CN1021609C - Capacitor phase-shift triggered current converter - Google Patents

Abstract

The present invention relates to an AC-DC current converter for capacitive phase shifting trigger control, which is provided with a 2N-phase zero type current converter. For a three-phase network, the AC-DC current converter is in a six-phase zero type. A switch element of the AC-DC current converter can be controlled to be switched on or off. A phase shifting direction is opposite to a three-phase fully controlled bridge of a traditional common triode thyristor. The switch element shifts left from alpha which is from 0 degree to-150 degrees, and the negative sign represents left shift. The alpha is more than or equal to-60 degrees and is less than or equal to 0 degree, which is a controllable rectification operating state. The alpha is more than or equal to-150 degrees and is less than or equal to-60 degrees, which is a controllable inversion or waiting for inversion state. As the phase shifting direction is left shift, the phase position of the current fundamental waves of the AC-DC current converter is advanced to a homonymous supply voltage, and thus, advanced wattless power is generated.

Description

Capacitor phase-shift triggered current converter

The invention belongs to a kind of phase shift and trigger the AC-DC current transformer of controlling, it is adjustable, and direct current is exported the dc motor variable voltage control.

The switch element of existing AC-DC current transformer all is common thyristor, because the shutoff of triode thyristor can only lean on nature cutout or switch element negative electrode to the reverse voltage of anode to force shutoff, from the three-phase voltage oscillogram, have only when α＞0 °, force the condition of turn-off reversal voltage just to possess, therefore, the phase shift range of triode thyristor AC-DC phase shift trigger converter is without exception without exception all is α＞0 °.Like this, from power supply, triode thyristor AC-DC current transformer to power supply grid always show as the perception.

Direct Current Governor System with Flow varying power supply provides the precedent of leading reactive power to have to power supply grid.For example, the patent CN87106578A of Hitachi promptly is an example, what yet this patent was discussed is a variable duration impulse system, but the current transformer of forming a three-phase full-controlled bridge form with the stopcock element, in a grid cyclic wave, each switch carries out the several times unblank and turn-offs operation, the width of each pulse in the control impuls sequence, switching frequency for example 500HZ is above to 3KHZ, thereby realize that according to the pulse duty factor that the reactive power of general load in the detected same electric power system is controlled described converter system current transformer provides the purpose of leading reactive power, described converter system to belong to current source type to power supply grid.

The present invention is intended to design a kind of capacitor phase-shift triggered current converter, and it can provide leading reactive power to the supply and AC electrical network when speed-regulated DC motor provides adjustable dc voltage.

The capacitor phase-shift triggered current converter of the present invention's design is a 2N zero formula current transformer mutually with regard to its structure, power supply grid is the N phase, therefore between the zero formula current transformer primary/secondary being arranged from N phase electrical network mutually to 2N is the rectifier transformer that N phase/2N has zero line mutually, for common three phase network, described current transformer is six zero formula mutually, described rectifier transformer is that △/Y-goes into the mode of connection, all be connected to switch element Qi(i=1～6 of a controlled shutoff of controlled unblank on the six roots of sensation phase line), the switch element of the controlled shutoff of described controlled unblank can be diode that bears reverse voltage of GTR string, it can be diode that bears reverse voltage of GTO string, also can be one to be merely able to bear the GTO element of reverse voltage, the KG type GTO element that provides of Baotou Aluminium Co., Ltd. for example, six switch element outputs and the zero line that is connected into an output line and rectifier transformer constitute two DC leadouts of current transformer; It below all is the example narration with N=3.

If the switch element GTR of described current transformer, promptly high-power binode type compound transistor, its circuits for triggering are by synchronizing signal, phase sequence automatic identification unit and phase-shift trigger unit constitute; Synchronizing signal is by the secondary voltage u of synchrotrans TFSYa, b, c _A1, u _B1, and u _C1Provide, its phase place respectively with power supply grid line voltage u _AB, u _BCAnd u _CAIdentical; The phase sequence automatic identification unit is by isolating transformer TFIS1,2, comparator C MP _1～4, D door bolt circuit LT ₁, LT ₃With variable connector MTA _1～6Form; Phase-shift trigger unit is by phase-shifting unit APSTy, b, r, pulsewidth forms circuit MSi(i=1～6), no matter how phase sequence can both guarantee variable connector MTi(i=1～6 that last turn-on switch component trigger impulse is turn-offed in one unblank switch element trigger impulse forward position, back) and MT ' i(i=1～6), buffer circuit BFi(i=1～6), pulse power amplifier circuit QAi(i=1～6) and pulse transformer TFMAi(i=1～6) constitute.

The unit side (8) of described phase-shifting unit APSTy, b, r is introduced synchronizing signal, and end (9) is introduced shifted signal from 15K Ω resistance, and 10K Ω resistance is introduced control signal i _Out, the unit is inner to be produced by the timing slope sawtooth waveforms of synchronizing voltage control and the signal synthesis decision phase shift value of unit side (9) introducing; The width that unit side (1) and (15) are exported the 180 ° of electrical degrees of being separated by respectively is 0.4 millisecond pulse.0.4 millisecond of wide pulse of phase-shifting unit output totally six to trigger output pulse width respectively be that six pulsewidths more than 80 ° form monostable trigger-action circuit MSi(i=1～6), its Q output is by buffer BFi(i=1～6) to pulse power amplifier circuit.

Described pulse power amplifier circuit is by power tube QAi(i=1～6) and as pulse transformer TFMAi(i=1～6 of power tube collector load) form; At the beginning of the described pulse transformer on the level winding and be connected to a discharge paths by the series connection of diode and resistance, as long as resistance is suitably big, QAi is become by saturation conduction and ends when occurring behind trigger impulse, and the pulse transformer core energy storage releases energy by elementary discharge loop and turn-offs at the switch element that the sharp negative pulse of secondary generation duration 40 microsecond is beneficial to be triggered.

If the switch element GTO of described current transformer, i.e. turn-off thyristor, its circuits for triggering are by synchronizing signal, phase sequence automatic identification unit and phase-shift trigger unit constitute; Synchronizing signal is identical with the corresponding circuits that adopts above-mentioned GTR switch element circuits for triggering with the phase sequence automatic identification unit; Phase-shift trigger unit is by phase-shifting unit or claim phase shift signal comprehensive unit APSTy, b, r, and pulsewidth forms the unit, and the unblanking pulse control signal is turn-offed pulse control signal and drive circuit unit and formed; Phase-shifting unit or claim phase shift signal comprehensive unit APSTy, b, r wherein; Pulsewidth forms unit MS _11～16And variable connector MT _1～6, MT ' _1～6Identical with the corresponding circuits of phase-shift trigger unit in adopting GTR switch element circuits for triggering; MS1i(i=1～6) Q output is through inverter buffer BF1i(i=1～6) control corresponding binode type triode QA1i(i=1～6), binode type transistor collector output promptly is the unblanking pulse control signal, receives special-purpose GTO drive circuit DRCi(i=1～6) unblanking pulse control end ONC; MS1(i=1～6) Q output triggers MS2i(i=1～6) monostable, MS2i(i=1～6) Q output is through inverter buffer BF2i(i=1～6) control binode type triode QA2i(i=1～6), the output of the collector electrode of binode type triode QA2i promptly is to turn-off pulse control signal, receives above-mentioned GTO drive circuit DRCi(i=1～6) shutoff pulse control end OFFC; Corresponding GTO element Qi(i=1～6 are received in the output of drive circuit DRCi) gate pole on, make the reliable unblank of QAi when ONC DRCi when+15 volts of high level sends trigger impulse to Qi, when OFFC during for+15 volts of high level DRCi be that the negative pulse of 40 microseconds makes the GTO reliable turn-off to Qi gate pole injection element cut-off current nominal value 1/3rd width.

The present invention has designed a kind of capacitor phase-shift triggered current converter, and it can provide leading reactive power to the supply and AC electrical network when speed-regulated DC motor provides adjustable dc voltage.If these cover speed regulating device are parts of certain many motor-driven work mechanism, other drive motors is the three-phase alternating current mouse cage machine of using always, so, this work mechanism is because described speed regulating device produce the function of dynamic reactive power, be that DVG function (Dynamic Var Generation) keeps the power factor higher to power supply grid, reduce the reactive energy exchange of work mechanism and power supply grid, reached the purpose that reduces power transmission loss.

The system that the present invention relates to is a phase-shift trigger system, owing to adopted the switch element of the controlled cut-off device of controlled unblank as current transformer, the phase shift direction is opposite with traditional triode thyristor three-phase full-controlled bridge.Triode thyristor three-phase full-controlled bridge phase shift direction is for example ° to be shifted to the right to α=150 ° from α=0, wherein phase shifting angle α is at [0 °, 90 °] between the time current transformer be operated in the controlled rectification state, α is at [90 °, 150 °] between the time current transformer be operated in inverter mode, if the dc load of described current transformer has enough energy to want feedback to go into the Alternating Current Power Supply electrical network.The phase shift direction of current transformer of the present invention is for example ° to move left to α=-150 ° from α=0, wherein phase shifting angle α is at [60 °, 0 °] between the time current transformer be operated in the controlled rectification state, α is at [150 °,-60 °] between the time current transformer be operated in inverter mode, if the dc load of described current transformer has enough energy to want feedback to go into the Alternating Current Power Supply electrical network.Because this current transformer phase shift direction moves to left, so the current first harmonics phase place that current transformer provides is leading voltage of the same name, has realized sending to power supply grid the purpose of leading reactive power.Current transformer of the present invention is a 2N zero formula current transformer mutually with regard to its structure, if power supply grid is the N phase.For the three phase supply electrical network, this current transformer is six zero mutually formulas.Six roots of sensation phase line connects six controlled stopcocks of controlled unblank, and six switch outputs connect together as one of current transformer direct current output end, and the other end of direct current output promptly is a zero line.

First example of using the DVG function that lock of the present invention states will be the high-power high seam electrical haulage shearer of China drum shearer manufacturing enterprise exploitation during the 8th five-year plan.It is higher that the trailer system of coal-winning machine is updated to reliability by traditional hydraulic haulage drive system, the better electrical haulage drive system of adjusting function.State Council's decision, coal mine is divided into the power backup pressure and is kept 1140 volts, do not consider to boost (all having boosted to 2300 volts or 3000 volts abroad) during the 8th five-year plan.In addition, coal-winning machine is to be powered by the trailing cable of deflection as down-hole reciprocating motion type production equipment.Consider the fail safe of deflection and towing-can not split off cable core or because of bending failure cable insulation-cross-section of cable maximum can only be 3 * 95 square millimeters.

This kind outside diameter of cable has been 76 millimeters! The safe current that uses under coal mine can not surpass 260 peaces.Like this, magnitude of voltage and lowest high-current value determine that one 1140 volts, the maximum apparent power that the power cable in 3 * 95 square millimeters of cross sections can transmit equals:

$\sqrt{3}$ * 1140 * 260=513 kilovolt-ampere

The three-phase squirrel cage machine rated power factor of considering the coal-winning machine equipment is generally all about 0.85, so the active power that described cable can transmit is

531 * 0.85=436 kilowatt

From design point of view, it is generally acknowledged one 1140 volts, 3 * 95 square millimeters of power cables can transmit 400 kilowatts of active power bases under coal mine be this.So the technical staff of research and design coal-winning machine thinks that the electrical haulage shearer of developing during the 8th five-year plan of China is powered with two 3 * 95 square millimeters of power cables, the maximum power of design can be above 800 kilowatts.

Yet coal is the topmost primary energy of China, and development and national economy increases very fast to the requirement of coal.The coal production industry is badly in need of wanting the big as far as possible coal-winning machine of gross power, such as, the total installation of generating capacity high-power coal cutter greater than 900 kilowatts.This just forces people's door to go to seek a way and makes an issue of improving on the power factor of service cable.

In the coal-winning machine fuselage, install, for example, the patented product SVS of Xi-an Coal Mine Machinery Plant type state type reactive power automatic compensator compensates to the load power factor of seeing from service cable more than 0.99, and the output of coal-winning machine active power can still remain in 260 peaces by the service cable running current up to 1000 kilowatts like this.The capacity of but this SVS device is 620 kilovars at least, and device volume is bigger, is difficult to put in the coal-winning machine fuselage, does not also say the explosion-proof that running environment proposes under the coal mine, and shock resistance etc. are to other technical problem of building-out capacitor specific (special) requirements.

If the DVG technology that adopts the present invention to set forth, this problem promptly is readily solved.

If do not adopt the DVG technology, the following configuration of coal-winning machine electric power system: 3 * 95 square millimeters of cables carry 300 kilowatts of Rolling motors, 120 kilovolt-amperes of rectifier transformers, and this transformer carries two 40 kilowatts of dc traction motors by current transformer.This cable carries 380 kilowatts of burdens with power altogether, and cable power factor is 0.85 or lower.

Another cable also is 3 * 95 square millimeters, is with another 300 kilowatts of Rolling motors, 65 kilowatts of broken Rolling motor (short-term operation, often unloaded), a capacity below 15 kilowatts heighten pump motor (short-term operation, often unloaded).Like this, coal-winning machine overall apparatus capacity is 760 kilowatts.

If adopt the DVG technology, the coal-winning machine electric power system is configurable as follows: 3 * 95 square millimeters of cables carry 375 kilowatts of Rolling motors, 170 kilovolt-amperes of rectifier transformers, this transformer carries two 40 kilowatts of dc traction motors by the current transformer with DVG function that the present invention sets forth.This cable carries 455 kilowatts of active power loads altogether.According to computer simulation, this cable power factor is up to 0.93 even higher.Another 3 * 95 square millimeters of cables carry 375 kilowatts of Rolling motors, and 65 kilowatts of broken Rolling motor (short-term operation, often unloaded) and one heighten pump motor (short-term operation, often zero load) below 15 kilowatts.

Like this, coal-winning machine overall apparatus capacity is 910 kilowatts.Crucial problem is, the cable current that carries 455 kilowatts of burdens with power does not increase, when middling speed traction coal cutting work, and this cable current even also low during than the same operating mode of first kind of scheme, power factor is much higher.

Accompanying drawing 1A adopts the phase-shift triggered current converter schematic diagram of GTR switch element.

Accompanying drawing 1B adopts the phase-shift triggered current converter schematic diagram of GTQ serial connection diode as switch element.

When accompanying drawing 2 load currents equal direct current Id, power supply phase voltage, the elementary phase voltage winding current of rectifier transformer, the oscillogram of the elementary line current of rectifier transformer.

The secondary phase voltage waveform figure of accompanying drawing 3 rectifier transformers

The relation of accompanying drawing 4 current transformer bridge arm voltages and corresponding electric current

Corresponding driving circuit when accompanying drawing 5 converter switches elements are GTR

Accompanying drawing 6 the phase-shift trigger circuit that to be KJ004 slice, thin piece internal wirings constitute with outer auxiliary circuit with vertical controlled function.

Accompanying drawing 7 is as power supply A, B, when C is positive sequence, the temporal and logic relation figure of phase sequence automatic identification circuit

Accompanying drawing 8 is as power supply A, B, when C is negative phase-sequence, the temporal and logic relation figure of phase sequence automatic identification circuit

Accompanying drawing 9 is as power supply A, B, when C is positive sequence, and switch element triggers sequential logic figure

Accompanying drawing 10 is as power supply A, B, when C is negative phase-sequence, and switch element triggers sequential logic figure

Corresponding driving circuit when accompanying drawing 11 converter switches elements are GTO

The present invention was done the description in a step below in conjunction with accompanying drawing:

Its shift direction of capacitor phase-shift triggered current converter of the present invention's design is opposite with traditional AC-DC triode thyristor convertor assembly shift direction.From oscillogram, traditional triode thyristor phase-shift triggered current converter phase shifting angle can be shifted to the right to from α=0, for example, and α=150 °, or β=30 °.If this kind current transformer output current is the direct current of ripple-free, so, can proves from power supply grid and see that the phasor power factor of this kind convertor assembly input equals cos α.In other words, when α≤90 °, α is big more, and output dc voltage is low more, and the mains supply current first harmonics is big more to voltage delay of the same name angle, and power factor is low more.

By symbol and the implication that traditional AC-DC triode thyristor phase-shift triggered current converter uses, phase shift range of the present invention is that α=0 ° moves left to α=-150 °.During actual the use often is [120 °～0 °].

The rectifier transformer of this convertor assembly is △/Y-λ mode of connection.Current transformer is made up of the switch element of six controlled shutoffs of controlled unblank, can be GTR, also can be that GTO(sees accompanying drawing 1).The longest continuous conducting interval of each switch element is 60 ° of electrical degrees, for 50Hz electrical network, i.e. 3.33ms.

Accompanying drawing 2 is load currents when equaling direct current Id, power supply phase voltage, the elementary phase voltage winding current of rectifier transformer, the oscillogram of the elementary line current of rectifier transformer.

The direct voltage of current transformer output and the relation derivation of phase shift trigger angle are as follows, suppose that the current transformer output current is continuous, from accompanying drawing 3 as can be known: θ=2 π ft, f: mains frequency

V ₂（t）＝ $\sqrt{2}$ V ₂sin（θ+30°）

V _d＝ 3/(π) ${\∫}_{\alpha }^{\mathrm{\alpha +60°}}\sqrt{2}$ V ₂sin（θ+30°）dθ

＝ $\frac{3\sqrt{2}}{\pi }$ V ₂sin（α+60°）

＝1.35V ₂sin（α+60°）

So,

In other words, phase shift range current transformer in [60 °, 0 °] are interval is operated in rectification state, and phase shift range current transformer in [150 ° ,-60 °] are interval is operated in inverter mode.Here, continuous this prerequisite of current transformer output current is self-evident.

Can prove, if current transformer output numerical value constant DC stream I _d, the α angle moves to left more so, and described current transformer is big more to the leading reactive power that power supply grid provides.With the secondary a of rectifier transformer is example mutually, referring to accompanying drawing 4:

V _2a（t）＝ $\sqrt{2}$ V ₂sin（θ+30°）

θ=2 π ft wherein, f is the power supply grid frequency, amplitude is I _dThe square wave current width is that 60 ° of electrical degrees are by switch element Q ₁Provide.Amplitude is-I _dWidth is that the square wave current of 60 ° of electrical degrees is by switch element Q ₄Provide.Phase shift trigger angle α as shown in Figure 4.

For current wave being used cosine term Fourier series expression, Y axis Y is moved on to I _dThe square wave centre position, new coordinate system transverse axis variable is represented with φ.

Obviously, φ=θ-α-30 °

V _2a（t）＝ $\sqrt{2}$ V ₂sin（φ+α+60°）

Current wave function on new coordinate system is:

Be even function, be decided to be zero so have only the cosine term coefficient to differ.The cosine term fundamental factor

$A_1=\frac{2}{\pi }{\∫}_o^{\pi }\mathrm{i(\phi )cos\phi d\phi }$

$=\frac{2}{\pi }［{\∫}_o^{\frac{\pi }{6}}{I}_d\mathrm{cos\phi d\phi -}{\∫}_{\frac{5}{6}\pi }^{\pi }{I}_d\mathrm{cos\phi d\phi \; ］}$

＝ 2/(π) I _d

So the fundametal compoment of current wave is

i ₁（φ）＝ 2/(π) I _dcosφ

$i_1\mathrm{(t)=}\sqrt{2}\frac{\sqrt{2}}{\pi }{I}_d\mathrm{sin(\theta +60°-\alpha )}$

With corresponding commutating voltage function

V _2a（t）＝ $\sqrt{2}$ V ₂sin（θ+30°）

Compare as can be known (30 °-α) electrical degree of electric current leading voltages.

This has just proved that the α angle moves to left more, and current first harmonics is leading more.From contributing the leading reactive power this point to power supply grid, this convertor assembly is very desirable to the dc drive system power supply that drives the big torque load of middling speed.

This convertor assembly switch element is controlled shutoff.For avoiding the temporary overvoltage in the switch commutation course, the shutoff of previous element is depended in the unblank of a back element.The logical design of drive circuit has guaranteed this point.It guarantees that two switch elements in the commutation course have a conducting overlapping district, make the current transformer output current continuous.

If described converter switches element is GTR, i.e. High-power Semiconductor Triode, the corresponding driving circuit is as shown in Figure 5.Can be divided into following a few part by function describes:

1, synchronizing signal

2, phase sequence is discerned automatically

3, phase shift triggers

1, synchronizing signal: the phase shift function of described converter switches element circuits for triggering is to use the phase-shift trigger ic sheet, for example, finishes with KJ004.Accompanying drawing 6 the phase-shift trigger circuit that to be KJ004 slice, thin piece internal wirings constitute with outer auxiliary circuit with vertical controlled function.Produce a sawtooth waveforms by per half grid cyclic wave of the design of this circuit, synchronizing signal is sinusoidal wave.Because of the automatic needs of identification of phase sequence, synchronizing signal must be through multicircuit switch, and MC14016 for example receives the synchronous input end of KJ004, i.e. sheet pin＜8 〉.Synchronizing signal is by the secondary signal U of isolating transformer TFSYa, b and C _A1, U _B1And U _C1Form.The root-mean-square value of these three sinusoidal signals is 4.5 volts.

2, phase sequence is discerned automatically: phase sequence is by the line voltage U _ABAnd U _CAThrough isolating transformer TFIS _1,2Isolate then through reshaper CMP _1,2Be shaped to square wave then at d type flip flop, for example MC14013 discerns automatically.When power supply A, B and C are positive sequence, d type flip flop LT ₁Q be output as high level, make H with postscript, and Q is a low level, make L with postscript, because at d type flip flop LT ₁In clock input pulse rising edge constantly, its D input is H.Its temporal and logic relation is seen Fig. 7.When A, B and C are negative phase-sequence, LT ₁Q be output as L and Q is H.The temporal and logic relation of phase sequence is seen Fig. 8.

When A, B and C were positive sequence, converter switches conducting order should be Q ₁-Q ₂-Q ₃-Q ₄-Q ₅-Q ₆-Q ₁Circulation.When A, B and C were negative phase-sequence, converter switches conducting order should be Q ₆-Q ₅-Q ₄-Q ₃-Q ₂-Q ₁-Q ₆Circulation.The present invention guarantees the automatic realization of this order with the way of adjusting phase shift trigger corresponding synchronous voltage.

With reference to accompanying drawing 5, work as A, when B and C are positive sequence, variable connector MTA1,3,5 conductings and MTA2,4,6 disconnects.Phase-shift trigger ic sheet PSTy, the b and the synchronizing signal on the r that are added in model and are KJ004 are respectively U successively _C1, U _A1And U _B1Thereby, realized that switch unblank trigger impulse is Q in proper order ₁-Q ₂-Q ₃-Q ₄-Q ₅-Q ₆Circulation.When A, B and C were negative phase-sequence, variable connector MTA2,4,6 conductings and MAT1,3,5 disconnects made the synchronizing signal that is added on APSTy, b and the r become U successively respectively _B1, U _C1And U _A1Thereby, realized that switch unblank trigger impulse is Q in proper order ₆-Q ₅-Q ₄-Q ₃-Q ₂-Q ₁-Q ₆Circulation.

D type flip flop LT ₁Supply voltage is ± the 9v duplicate supply variable connector MTA _1～6The supply voltage of integrated circuit chip also is ± the 9v duplicate supply.

3, phase shift triggers: phase shift triggers function and is realized by phase shift trigger APSTy, b and the r that KJ004 phase shift triggering IC and outer auxiliary circuit constitute.Phase shifting angle is determined by three signal synthesis.These three signals are: the slope sawtooth waveforms is decided in the timing that the inner saw-toothed wave generator of KJ004 produces, and sawtooth waveforms length is about 170 ° of electrical degrees of the time between the synchronizing signal two adjacent zero crossings; By KJ004 sheet pin＜9〉on the 15K Ω resistance that connect introduce fixed offset voltage and introduce phase-shifted control signal with the 10K Ω resistance on a slice pin.Offset voltage is so adjusted: the offset voltage of adjusting under the null prerequisite of control signal makes trigger impulse occur in α=-60 ° moment.If the continuous DC component of output voltage so of current transformer output current this moment is zero just.The trigger impulse phase shift had just only been depended on control signal iout after skew was adjusted.If control signal is for negative, trigger impulse ° moves to right from α=-60, and promptly α becomes big, and current transformer is operated in controlled rectification state.If control signal is being for just, trigger impulse ° moves to left from α=-60, and promptly α diminishes.If this moment, external condition possessed, current transformer will be accepted to irritate direct current energy that electric current discharges load and be transformed into interchange and return power supply grid.

The switch element Q of current transformer _1～6Trigger pulse width be the broad pulse of 60 ° of electrical degrees.Pulsewidth is by six monostable MS _1～6Decision, monostable circuit can be the MC14528 integrated circuit.Monostable temporarily steady pulsewidth is adjusted about 80 ° of electrical degrees.The back edge of previous switch element trigger impulse is by the forward position control of a back switch element trigger impulse during real work, and purpose is to guarantee that two commutation switch have a conducting to overlap and distinguish.Its technology realizes: another d type flip flop LT ₃Q and Q output SYA ₁And SYA ₂The control sequence on edge behind the control trigger impulse.When A, B and C are positive sequence, LT ₃Q be H and Q is L, monostable like this MS _1～6The RESET input C _DLast variable connector MT _1～6Conducting and MT ' _1～6Turn-off.Like this, with Q ₁And Q ₂Commutation course is that so to say that example sets forth its process: from MS ₁Temporarily steady rising edge of a pulse begins, during 60 ° of electrical degrees, and MS ₂Q become H from L, switch element Q ₂Obtain trigger impulse, simultaneously MS ₂Q become L from H, pass through MT ₁Deliver to MS ₁C _DForce MS ₁Temporarily steady the end, if do not have this reset signal, MS ₁Surely will continue 80 ° of left and right sides electrical degrees temporarily.Like this, MS ₁Q become L, power tube QA ₁End pulse transformer TFMA ₁The positive triggering pulse of output finishes.The level winding forms discharge loop by resistance and the diode of suitably selecting at the beginning of the described pulse transformer.Like this, the pulse transformer secondary winding sends the sharp negative pulse acceleration switch element Q that amplitude continues tens of microseconds more greatly ₁Shutoff.When A, B and C are negative phase-sequence, LT ₃Q be L and Q is H, variable connector MT conducting and MT _1～6Turn-off.Still with Q ₁Be example, at MS ₁When surely continuing 60 ° of electrical degrees temporarily, MS ₆Q become H, switch element Q ₆Obtain trigger impulse, simultaneously MS ₆Q become L, by MT ' ₁And MS ₁C _DEnd forces MS ₁Steady temporarily the end.Switch element Q ₁The unblank trigger impulse obtain quickening turn-offing the situation of negative pulse and roughly the same preceding after finishing, repeat no more.

Clearly, phase-shift trigger ic sheet APSTy, b and r(KJ004 type in the accompanying drawing 5) in described drive circuit, have only two effects: the first, produce and control signal relative trigger pulse phase shift; The second, trigger the decision pulse duration and can realize that a back trigger impulse forward position controls the monostable circuit MS on edge behind the last trigger impulse _1～6Only 0.4 millisecond of the pulse duration of APSTy, b and r output itself is with switch element Q _1～6Trigger pulse width it doesn't matter.In addition,, also can not export width and reach 80 ° trigger impulse, so for example have to select for use the monostable IC sheet of MC14538 to realize this function because KJ004 can't realize that one trigger impulse forward position, back controls the function on edge behind the last trigger impulse.

Accompanying drawing 9 and 10 is respectively A, and B and C are that the switch element of positive sequence and negative phase-sequence triggers sequential logic figure.

Another some explanation is, why MS _1～6Temporarily steady pulsewidth fixes on greater than 80 ° of left and right sides electrical degrees.Six switch element Q of described current transformer _1～660 ° of electrical degrees of each element conductive in a grid cyclic wave, this is meant the situation when control voltage is a certain constant.And control signal is constantly changing to guarantee that operational system has the design objective of some regulation in the system of actual motion.Like this, two adjacent switch element ON time might be than 60 ° of weak points, also might be longer than 60 °.According to triode thyristor current transformer trigger impulse pattern (broad pulse or dipulse), MS _1～6Temporarily steady pulsewidth fixes on greater than 80 ° and has just met the demands less than 100 °.

If described converter switches element is GTO, i.e. turn-off thyristor, the corresponding driving circuit is as described in the accompanying drawing 11.It is by synchronizing signal, and phase sequence is discerned automatically and phase shift triggers three parts formation.It is identical with accompanying drawing 5 that synchronizing signal and phase sequence are discerned two parts automatically.The phase shift triggering part is comprehensive by phase shift signal, and pulsewidth forms, and the unblanking pulse control signal is turn-offed pulse control signal and drive circuit unit and formed.Phase shift signal is comprehensively at integrated APST of phase shift trigger _{Y, b, r}On carry out, comprehensively determine the phase shift value from the timing slope sawtooth waveforms of the control signal iout of sheet＜9〉end 15K Ω resistance input and sheet generation itself, the be separated by triggering signal of 180 ° of electrical degrees of generation is respectively held in sheet it＜1〉and＜15 〉.Pulsewidth forms: phase shift triggering signal rising edge is APST _{Y, b, r}It＜1〉and＜15〉end output signal removes to trigger each monostable MS respectively _11～16, monostable pulsewidth is more than 80 °, and the edge is by monostable C behind the actual trigger impulse _DEnd letter in reply signal deciding.With switch element Q ₁Trigger sequence is an example under power supply positive sequence condition, at this moment variable connector control signal SYA ₁Be high level, SYA ₂Be low level, so variable connector MT _1～6Logical, MT ' _1～6Disconnected.As switch element Q ₂The trigger impulse forward position occurs, MS ₁₂Q pulse trailing edge pass through MT ₁At MS ₁₁C _DEnd makes MS ₁₁Reset QA ₁₁Output step-down level, Q ₁The unblank trigger impulse finish.QA ₁₁Collector electrode output promptly is the special-purpose drive circuit DRCi(i=1 of GTO～6) the unblanking pulse control signal of (for example KGC drive circuit of Baotou Aluminium Co., Ltd.'s development), receive the ONC end of DRCi.Turn-off pulse control signal: MS ₁₁Q be MS ₂₁Triggering input, MS ₂₁Q output pass through BF ₂₁Make QA ₂₁Saturation conduction is exported the shutoff negative pulse control signal of 40 microsecond wide cut degree+15 volts, and this signal is received the special-purpose drive circuit DRCi(i=1 of GTO～6) shutoff pulse control end OFFC.Drive circuit is used for controlling GTO unblank and shutoff.With the KGC drive circuit is example, drive circuit triggers the GTO gate pole and makes its unblank when the unblanking pulse control signal is+15 volts, when turn-offing pulse control signal and be+15 volts, drive circuit to GTO gate pole injection element cut-off current nominal value 1/3rd and width to be the negative pulse of 40 microseconds make the GTO reliable turn-off.

Last point explanation is: general GTR or GTO have an anti-and diode, so to be a GTR connect with a diode that bears back-pressure or a GTO connects with a diode that bears back-pressure at the controlled cut-off device of controlled unblank described in this programme.Like this, by the voltage characteristic assurance of GTR or GTO, switch element reverse voltage ability to bear was guaranteed by described series diode reverse voltage ability to bear when switch element bore forward voltage.Certainly, if the KG type GTO element of employing Baotou Aluminium Co., Ltd. just can be without series diode.

The circuit connecting relation of capacitor phase-shift triggered current converter is as follows:

Capacitor phase-shift triggered current converter is made up of rectifier transformer and switch element, and described capacitor phase-shift triggered current converter is a 2N zero a formula current transformer mutually, and power supply grid is the N phase; Between the zero formula current transformer primary/secondary being arranged from N phase electrical network mutually to 2N is N phase/2N phase (zero line is arranged) rectifier transformer; For common three phase network, described current transformer is six zero formula mutually, and described rectifier transformer is △/Y-

The wiring direction, six roots of sensation phase line is respectively+a phase ,-the c phase ,+the b phase ,-a phase ,+c mutually with-b mutually, differ 60 ° of phase angles successively in twos; Secondary Y-

The asterism outlet is six zero lines of zero formula mutually; Below all be the example narration with N=3:

The switch element Q that a controlled shutoff of controlled unblank is all arranged on the six roots of sensation phase line _i(i=1～6), the switch element of the controlled shutoff of described controlled unblank are diodes that bears reverse voltage of high-power binode type compound transistor GTR series connection, and like this, switch element can be regarded the GTR element that can bear reverse voltage as; Six roots of sensation phase line+a ,-c ,+b ,-a ,+c and-b, be connected on Q successively respectively ₁, Q ₂, Q ₃, Q ₄, Q ₅And Q ₆Collector electrode on, the emitter-base bandgap grading of six GTR elements is connected together as the direct current positive output end of current transformer; The direct current negative output terminal of current transformer is the secondary zero line of rectifier transformer; Q _iThe base stage wire size of (i=1～6) is respectively 1,2,3,4,5 and 6 successively; The direct current positive-negative output end of current transformer connects load, such as, the armature of speed-regulated DC motor.

The switch element of described current transformer is GTR, and its circuits for triggering are by synchronizer, and phase sequence automatic identification unit and phase-shift trigger unit constitute.

Described synchronizer is made up of three synchrotrans TFSYa, b, c, and the elementary winding of synchrotrans TFSYa, b, c is connected on power supply grid line voltage U successively respectively _AB, U _BCAnd U _CAOn, its secondary winding has a public termination direct current common port (being common so-called direct current ground), TFSY _aThe secondary winding other end to the voltage U of direct current common port _A1With elementary line voltage U _ABHomophase, in like manner TFSY _bSecondary output voltage U _B1With U _BCHomophase, TFSY _cSecondary output voltage U _C1With U _CAHomophase.

Described phase sequence automatic identification unit is by isolating transformer TFIS_1.2., comparator C MP_1～4, D door bolt circuit LT₁、LT ₃, variable connector MTA_1～6，MT _1～6And MT '_1～6Form; TFIS₁Armature winding be connected on the power supply grid voltage U_ABOn, secondary windings one termination direct current common port, the other end meets comparator C MP by coupling resistance 10k Ω respectively₁、CMP ₄The same polarity input, heteropolarity input termination direct current common port, from alternating voltage and the power supply grid voltage U of same polarity input input_ABHomophase; CPM₁The square-wave voltage of output meets D door bolt circuit LT₁In clock input be the CK end; CMP₄The square-wave voltage of output meets D door bolt circuit LT₃In clock input be the CK end; TFIS₂Armature winding connect power supply grid line voltage U_CAOn, secondary windings one termination direct current common port, the other end meets comparator C MP by coupling resistance 10k Ω respectively₂、CMP ₃The same polarity input, heteropolarity input termination direct current common port, from alternating voltage and the power supply grid voltage U of same polarity input input_CAHomophase; Comparator C PM₂The square-wave voltage of output meets D door bolt circuit LT₁The D input, CPM₃The square-wave voltage of output meets D door bolt circuit LT₃The D input; Like this, work as LT₁And LT₃Q be output as high level interval scale electrical network phase sequence A, B, C are positive sequence, work as LT₁And LT₃Q be output as low level interval scale electrical network phase sequence A, B, C are negative phase-sequence; Use described LT₁And LT₃Output level control variable connector MTA_1～6、MT _1～6And MT '_1～6Be the different phase sequence time shift phase controls of tunable and pulse sequence, the mode of connection is as follows, LT₁Q output receive variable connector A_1、3、5Control end C, variable connector MTA is received in its Q output_2、4、6Control end C; MTA₁Input signal be synchronizing voltage U_c1，MTA ₂Input signal be synchronizing voltage U_b1，MTA ₁And MTA₂Output be connected together and receive phase shifter APST by coupling resistance 2k Ω_ySynchronizing voltage input (8); MTA₃Input signal be U_a1，MTA ₄Input signal be U_c1，MTA ₃And MTA₄Output be connected together and receive phase shifter APST by coupling resistance 2k Ω_bSynchronizing voltage input (8); MTA₅Input signal be U_b1，MTA ₆Input signal be U_a1，MTA ₅And MTA₆Output be connected together and receive phase shifter APST by coupling resistance 2k Ω_rSynchronizing voltage input (8); D door bolt circuit LT₃Q output be denoted as SYA₁, Q output is denoted as SYA₂, variable connector MT_1～6Six control termination SYA₁, variable connector MT '_1～6Six control termination SYA₂;MT ₁And MT '₁Output is connected together and receives trigger impulse pulsewidth formation circuit monostable MS₁Reset terminal C_D; In like manner for any i value (i=2～6), MT_iAnd MT '_iOutput is connected together and receives monostable MS_iReset terminal C_D; Described phase-shift trigger unit is by phase shift unit AP ST_y、b、r, pulsewidth forms circuit monostable MS_i(i=1～6), buffer circuit BF_i(i=1～6), pulse power amplifier circuit QA_i(i=1～6) and pulse transformer TFMA_i(i=1～6) form; Described phase shift unit AP ST_y、b、rThree unit internal structures are identical, and external cabling removes synchronous signal input end (8), pulse output end (1), and outside (15) difference, other terminated line is all identical; The indirect 0.015 microfarad electric capacity in the end of every unit (11) and (12), end (12) and end (13) indirect 33k Ω resistance, end (13) meets positive supply+V simultaneously; Above-mentioned resistance capacitance has determined that phase shift unit side (1) and end (15) output pulse width are 0.4 millisecond; End (7) connects the direct current common port, end (5) meets negative supply-V by 1k Ω resistance, end (4) and end (3) indirect 0.47 microfarad electric capacity make it produce 170 ° of sawtooth waveforms that electrical angle is wide in every half synchronizing voltage cycle, end (3) and 6.8k Ω potentiometer of the indirect 30k Ω resistance string of negative supply-V be used for adjusting slope of sawtooth waveforms, it is sawtooth voltage U that end (4) is exported_CL; At phase shift unit AP ST_y、b、rEnd (9) has three signals comprehensively to determine the phase shift value separately, and first signal is the sawtooth waveforms U by coupling resistance 10k Ω input_CL, second signal is that the negative bias by 2.2k Ω drift potential device wiping point and the input of 15k Ω resistance moves voltage, the 3rd signal is the phase shift controlling voltage U by the input of 10k Ω resistance_SHOr iout, symbol iout names from the angle of automatic control system; The drift potential device of three phase shift unit is same potentiometers, guarantee the uniformity of skew, equally, the phase-shifted control signal of three phase shift unit is also same signal iout, the phase shift that the size of iout and change in polarity can be controlled the current transformer trigger impulse makes the DC voltage of current transformer output change size or polarity, APST_y、b、rThe end of three unit (13) the pulse blocking signal U that is connected together_BLK，U _BLKExternal circuit from automatic control the same as iout, U_BLKBlock APST during for zero level_y、b、rThe trigger impulse of output, U_BLKAllow APST during for high level_y、b、rThe output trigger impulse; Pulsewidth forms circuit by six monostable circuit MS_i(i=1～6) form, MS_iThe T of (i=1～6)₁End and T₂Hold indirect 0.1 a microfarad electric capacity, T₁Termination direct current common port, T₂End also meets positive supply+V by a 47k Ω resistance, and like this, the monostable pulsewidth is 4.7 milliseconds; MS_iB termination+the V of (i=1～6), APST_yOutput (1) meet MS₁A end, output (15) meets MS₄A end; APST_bOutput (1) meet MS₃A end, output (15) meets MS₆A end; APST_rOutput (1) meet MS₅A end, output (15) meets MS₂A end; MS_iThe Q output of (i=1～6) meets respectively buffer circuit BF successively_iThe input of (i=1～6), MS₁Q output receive MT₆And MT '₂Input; MS₂Q output receive MT₁And MT '₃Input; MS₃Q output receive MT₂And MT '₄Input; MS₄Q output receive MT₃And MT '₅Input, MS₅Q output receive MT₄And MT '₆Input, MS₆Q output receive MT₅And MT '₁Input; This mode of connection guarantees no matter phase sequence is positive sequence or negative phase-sequence, and the trigger impulse of a converter switches element order all correct and unblank trigger impulse forward position rear turn-on switch component the shutoff that induces last turn-on switch component triggers negative pulse; Buffer circuit BF_i(i=1～6) are used for carrying out the impedance coupling, and its output is received respectively pulse amplifier pipe QA successively by coupling resistance 510 Ω_iThe base stage of (i=1～6), QA_i(i=1～6, basic emitter-base bandgap grading between be connected to a 10k Ω resistance, the protection power tube, emitter-base bandgap grading meets direct current common port, QA_iThe colelctor electrode of (i=1～6) meets respectively pulse transformer TFMA successively_iOne of the armature winding of (i=1～6) end, TFMA_iThe other end of (i=1～6) armature winding is all received high voltage positive supply+V₁，TFMA _iAlso be connected to the series arm of a diode and resistance between the armature winding two ends of (i=1～6), the direction prevention+V of diode₁To the electric current of power tube colelctor electrode, described resistance value is quite large, guarantees QA_iWhen the self-saturation conducting became cut-off, the shutoff negative pulse that produces tens volts of the tens microsecond amplitudes of continuing when the magnetic energy that pulse transformer stores discharges on secondary windings made the switch element reliable turn-off of this shutoff; TFMA_iThe secondary windings of (i=1～6) is received respectively current transformer GTR switch element Q successively_iBase stage and the emitter-base bandgap grading of (i=1～6), the polarity of its connection guarantee that the unblank trigger impulse is from switch element Q_iThe base stage of (i=1～6) is to the emitter injection base flow, the conducting of trigger switch element, the switch element of simultaneously last conducting obtains the strong oppositely base flow to base stage from emitter-base bandgap grading and makes it become cut-off by saturation conduction rapidly from its pulse transformer is secondary, oppositely about 40 microseconds of base flow pulse duration.

The switch element Q that a controlled shutoff of controlled unblank is all arranged on the six roots of sensation phase line of capacitor phase-shift triggered current converter _i(i=1～6), the switch element of the controlled shutoff of described controlled unblank also can be one to be merely able to bear the GTO element of reverse voltage; Like this, switch element can be regarded the GTO element that can bear reverse voltage as; Six roots of sensation phase line+a ,-c ,+b ,-a ,+c and-b is connected on GTO element Q successively respectively ₁, Q ₂, Q ₃, Q ₄, Q ₅And Q ₆Anode on, the negative electrode of six GTO elements is connected together as the direct current positive output end of current transformer, the direct current negative output terminal of current transformer is the secondary zero line of rectifier transformer; Q _iThe control utmost point of (i=1～6) and negative electrode are connected on special-purpose drive circuit piece DRC successively respectively _iThe trigger impulse output of (i=1～6); Polarity is, the drive circuit piece injects trigger current from the control utmost point of the GTO that is triggered to negative electrode and makes it open-minded during unblanking pulse, and the drive circuit piece is that 1/3rd reverse trigger current of GTO anode current makes GTO element reliable turn-off from the GTO negative electrode that is triggered to control utmost point injection intensity when turn-offing pulse;

Described converter switches element is controlled cutoff thyristor GTO, and its circuits for triggering are by synchronizer, and phase sequence automatic identification unit and phase-shift trigger unit constitute; Synchronizer is identical with corresponding circuits in the claim 1 with the phase sequence automatic identification unit; Phase-shift trigger unit is by phase-shifting unit APST _{Y, b, r}Pulsewidth forms unit monostable MS _11～16, turn-off pulsewidth and form unit monostable MS _21～26, swing to buffer BF _11～16, BF _21～26, power tube QA _11～16, QA _21～26With the special-purpose drive circuit piece of GTO DRC _1～6Form, wherein phase-shifting unit APST _{Y, b, r}Identical with claim 1, pulsewidth forms unit monostable MS _11～16With the MS in the claim 1 _1～6Identical;

Turn-off pulsewidth and form unit monostable MS _2i(i=1～6); The reset terminal C of monostable _DB meets positive supply+V with the negative pulse trigger end, T ₁End and T ₂Hold indirect 2200 pf capacitance value, T ₁Termination direct current common port, T ₁End is received positive source+V by 18k Ω resistance, and above-mentioned capacitance-resistance has determined that about 40 microseconds of shutoff pulse control signal are wide, MS _2iThe positive pulse trigger end A of (i=1～6) is connected on pulsewidth successively respectively and forms unit MS _1iThe Q output of (i=1～6);

Swing to buffer BF _1i, BF _2i(i=1～6); BF _1i, the input of (i=1～6) is connected on MS successively respectively _1iThe Q output of (i=1～6), BF _1i, the output of (i=1～6) is received power tube QA by coupling resistance 360 Ω respectively successively _1iThe base stage of (i=1～6); BF _2iThe output of (i=1～6) is connected on MS successively respectively _2iThe Q output of (i=1～6), BF _2iThe output of (i=1～6) is received power tube QA by coupling resistance 360 Ω respectively successively _2iThe base stage of (i=1～6);

Power tube QA _1i(i=1～6) and QA _2i(i=1～6) are positive-negative-positives, and emitter-base bandgap grading all meets positive supply+V, and collector electrode connects the direct current common port by 10k Ω resistance; QA _1i(i=1～6) collector electrode is received the special-purpose drive circuit piece of GTO DRC successively respectively _iThe unblanking pulse control end ONC of (i=1～6), wire size respectively is 110,120,130,140,150 and 160; QA _2i(i=1～6) collector electrode is received DRC successively respectively _iThe shutoff pulse control end OFFC of (i=1～6), wire size respectively is 210,220,230,240,250 and 260; DRC _i(i=1～6) and power tube QA _1i, QA _2i(i=1～6) have identical direct current common port, DRC _iThe pulse output of (i=1～6) and control end ONC, OFFC, be that electricity is isolated between the direct current common port, when ONC is high level, DRC output unblank trigger impulse, when OFFC was high level, it was the shutoff trigger impulse that is turned off the GTO element anode current 1/3rd of triggering that DRC exports 40 microsecond wide cut degree.Circuit design has guaranteed that ONC and OFFC can not be high level simultaneously, so logic can be not chaotic; The special-purpose drive circuit piece of GTO itself does not belong to present patent application, and multiple supply of commodities is arranged both at home and abroad.

Claims (2)

1, a kind of capacitor phase-shift triggered current converter is made up of rectifier transformer and switch element, and described capacitor phase-shift triggered current converter is a 2N zero a formula current transformer mutually, and power supply grid is the N phase; Between the zero formula current transformer primary/secondary being arranged from N phase electrical network mutually to 2N is N phase/2N phase (zero line is arranged) rectifier transformer; For common three phase network, described current transformer is six zero formula mutually, and described rectifier transformer is △/Y- The wiring direction, six roots of sensation phase line is respectively+a phase ,-the c phase ,+the b phase ,-a phase ,+c mutually with-b mutually, differ 60 ° of phase angles successively in twos; The outlet of secondary Y-asterism is six zero lines of zero formula mutually; Below all be the example narration, it is characterized in that with N=3:

The switch element Q that a controlled shutoff of controlled unblank is all arranged on the six roots of sensation phase line _i(i=1～6), the switch element of the controlled shutoff of described controlled unblank are diodes that bears reverse voltage of high-power binode type compound transistor GTR series connection, and switch element can be regarded the GTR element that can bear reverse voltage as; Six roots of sensation phase line+a ,-c ,+b ,-a ,+c and-b, be connected on Q successively respectively ₁, Q ₂, Q ₃, Q ₄, Q ₅And Q ₆Collector electrode on, the emitter-base bandgap grading of six GTR elements is connected together as the direct current positive output end of current transformer; The direct current negative output terminal of current transformer is the secondary zero line of rectifier transformer; Q _iThe base stage wire size of (i=1～6) is respectively 1,2,3,4,5 and 6 successively; The direct current positive-negative output end of current transformer connects load;

The switch element of described current transformer is GTR, and its circuits for triggering are by synchronizer, and phase sequence automatic identification unit and phase-shift trigger unit constitute;

Described synchronizer is made up of three synchrotrans TFSYa, b, c, and the elementary winding of synchrotrans TFSYa, b, c is connected on power supply grid line voltage U successively respectively _AB, U _BCAnd U _CAOn, its secondary winding has a public termination direct current common port (being common so-called direct current ground), TFSY _aThe secondary winding other end to the voltage U of direct current common port _AlWith elementary line voltage U _ABHomophase, in like manner TFSY _bSecondary output voltage U _BlWith U _BCHomophase, TFSY _cSecondary output voltage U _ClWith U _CAHomophase;

Described phase sequence automatic identification unit is by isolating transformer TFIS _1.2, comparator C MP _1～4, D door bolt circuit LT ₁, LT ₃, variable connector MTA _1～6, MT _1～6And MT ^' _1～6Form; TFIS ₁At the beginning of the level winding be connected on the power supply grid voltage U _ABOn, secondary winding one termination direct current common port, the other end meets comparator C MP by coupling resistance 10K Ω respectively ₁, CMP ₄The same polarity input, the heteropolarity end is gone into termination direct current common port, from the alternating voltage and the power supply grid voltage U of same polarity input input _ABHomophase; CPM ₁The square-wave voltage of output meets D door bolt circuit LT ₃In clock input be the CK end; CMP ₄The square-wave voltage of output meets D door bolt circuit LT ₃In clock input be the CK end; TFIS ₂At the beginning of the level winding connect power supply grid line voltage U _CAOn, secondary winding one termination direct current common port, the other end meets comparator C MP by coupling resistance 10K Ω respectively ₂, CMP ₃The same polarity input, heteropolarity input termination direct current common port is from the alternating voltage and the power supply grid voltage U of same polarity input input _CAHomophase; Comparator C PM ₂The square-wave voltage of output meets D door bolt circuit LT ₁The D input, CPM ₃The square-wave voltage of output meets D door bolt circuit LT ₃The D input; Use described LT ₁And LT ₃Output level control variable connector MTA _1～6, MT _1～6And MT _{' 1～6}, the mode of connection is as follows, LT ₁Q output receive variable connector A _1,3,5Control end C, variable connector MTA is received in its Q output _2,4,6Control end C; MTA ₁Input signal be synchronizing voltage U _CLMTA ₂Input signal be synchronizing voltage U _Bl, MTA ₁And MTA ₂Output be connected together and receive phase shifter APST by coupling resistance 2K Ω _YSynchronizing voltage input (8); MTA ₃Input signal be U _Al, MTA ₄Input signal be U _Cl, MTA ₃And MTA ₄Output be connected together and receive phase shifter APST by coupling resistance 2K Ω _bSynchronizing voltage input (8); MTA ₅Input signal be U _Bl, MTA ₆Input signal be U _Al, MTA ₅And MTA ₆Output be connected together and receive phase shifter APST by coupling resistance 2K Ω _cSynchronizing voltage input (8); D door bolt circuit LT ₃Q output note make SYA ₁, Q output note is made SYA ₂, variable connector MT _1～6Six control termination SYA ₁, variable connector MT ^' _1～6Six control termination SYA ₂MT ₁And MT ^' ₁Output is connected together and receives trigger impulse pulsewidth formation circuit monostable MS ₁Reset terminal C _DiIn like manner for any i value (i=2～6), MT _iAnd MT ^' _iOutput is connected together and receives monostable MS _iReset terminal C ₀

Described phase-shift trigger unit is by phase-shifting unit APST _{Y, b, r}, pulsewidth forms circuit monostable MS _i(i=1～6), buffer circuit BF _i(i=1～6), pulse power amplifier circuit QA _i(i=1～6) and pulse transformer TFMA _i(i=1～6) constitute; Described phase-shifting unit APST _{Y, b, r}Three unit internal structures are identical, and external cabling removes synchronous signal input end (8), pulse output end (1), and outside (15) difference, other terminated line is all identical; Indirect one the 0.015 microfarad electric capacity in the end of every unit (11) and (12), end (12) and end (13) indirect 33K Ω resistance, end (13) meets positive supply+V simultaneously; End (7) connects the direct current common port, end (5) meets negative supply-V by 1K Ω resistance, end (4) and end (3) indirect one 0.47 microfarad electric capacity make it produce 170 ° of sawtooth waveforms that electrical degree is wide in per half synchronizing voltage cycle, end (3) and a 6.8K Ω of the indirect 30K Ω resistance string of negative supply-V potentiometer be used for the adjusting slope of sawtooth waveforms, it is sawtooth voltage U that end (4) is exported _ClAt phase-shifting unit APST _{Y, b, r}End (9) has three signals comprehensively to determine the phase shift value separately, and first signal is the sawtooth waveforms U by coupling resistance 10K Ω input _Cl, second signal is that the negative bias by 2.2 Ω drift potential device wiping points and the input of 15K Ω resistance moves voltage, the 3rd signal is the phase shift controlling voltage U by the input of 10K Ω resistance _SHOr iout; The drift potential device of three phase-shifting units is same potentiometers, and same, the phase-shifted control signal of three phase-shifting units also is same signal iout, APST _{Y, b, r}The end of three unit (13) the pulse blocking signal U that is connected together _BLK, U _BLKThe same external circuit with iout from automatic control, U _BLKBlock APST during for zero level _{Y, b, r}The trigger impulse of output, U _BLKAllow APST during for high level _{Y, b, r}The output trigger impulse; Pulsewidth forms circuit by six monostable circuit MS _i(i=1～6) are formed, MS _iThe T of (i=1～6) ₁End and T ₂Hold indirect one 0.1 microfarad electric capacity, T ₁Termination direct current common port, T ₂End also meets positive supply+V, MS by a 47K Ω resistance _iB termination+the V of (i=1～6), APST _yOutput (1) meet MS ₁A end, output (15) meets MS ₄A end; APST _bOutput (1) meet MS ₃A end, output (15) meets MS ₆A end; APST _rOutput (1) meet MS ₅A end, output (15) meets MS ₂A end; MS _iThe Q output of (i=1～6) meets buffer circuit BF successively respectively _iThe input of (i=1～6), MS ₁Q output receive MT ₆And MT ^' ₂Input; MS ₂Q output receive MT ₁And MT ^' ₃Input; MS ₃Q output receive MT ^' ₂And MT ₄Input, MS ₄Q output receive MT ^' ₃And MT ^' ₅Input, MS ₅Q output receive MT ₄And MT ^' ₆Input, MS ₆Q output receive MT ₅And MT ^' ₁Input; Buffer circuit BF _i(i=1～6) are used for carrying out the impedance coupling, and its output is received pulse amplifier pipe QA respectively successively by coupling resistance 510 Ω _iThe base stage of (i=1～6), QA _i(i=1～6), basic emitter-base bandgap grading between be connected to a 10K Ω resistance, the protection power tube, emitter-base bandgap grading meets direct current common port, QA _iThe collector electrode of (i=1～6) meets pulse transformer TFMA successively respectively _iOne of level winding end at the beginning of (i=1～6), TFMA _iThe other end of (i=1～6) elementary winding is all received high voltage positive supply+V ₁, TFMA _iAlso be connected to the series arm of a diode and resistance at the beginning of (i=1～6) between level winding two ends, the direction prevention+V of diode ₁To the electric current of power tube collector electrode, described resistance value is quite big, guarantees QA _iThe self-saturation conducting becomes when ending, and the shutoff negative pulse that produces tens volts of the tens microsecond amplitudes of continuing when the magnetic energy that pulse transformer stores discharges on secondary winding makes the switch element reliable turn-off of this shutoff; TFMA _iThe secondary winding of (i=1～6) is received current transformer GTR switch element Q successively respectively _iThe base stage and the emitter-base bandgap grading of (i=1～6), the polarity of its connection guarantee that the unblank trigger impulse is from switch element Q _iThe base stage of (i=1～6) is to the emitter injection base flow, the trigger switch element conductive, the switch element of last conducting simultaneously rapidly by saturation conduction change is ended base from emitter-base bandgap grading to strong oppositely its stream of base stage from secondary the obtaining of its pulse transformer, oppositely about 40 microseconds of base flow pulse duration.

2, a kind of capacitor phase-shift triggered current converter as claimed in claim 1 is characterized in that:

The switch element Q of the controlled shutoff of described controlled unblank _i(i=1～6) also can be one to be merely able to bear the GTO element of reverse voltage; Q _iThe control utmost point of (i=1～6) and negative electrode are connected on special-purpose drive circuit piece DRC successively respectively _iThe trigger impulse output of (i=1～6);

Described shutoff pulsewidth forms unit monostable MS _2iThe reset terminal C of (i=1～6) _DB meets positive supply+V with the negative pulse trigger end, T ₁End and T ₂Hold indirect 2200 pf capacitance value, T ₁Termination direct current common port, T ₁End is received positive source+V, MS by 18K Ω resistance _2iThe positive pulse trigger end A of (i=1～6) is connected on pulsewidth successively respectively and forms unit MS _1iThe Q output of (i=1～6);

The described buffer BF that swings to _1i, Bb _2i(i=1～6); BF _1iThe input of (i=1～6) is connected on MS successively respectively _1iThe Q output of (i=1～6), BF _1iThe output of (i=1～6) is received power tube QA by coupling resistance 360 Ω respectively successively _1iThe base stage of (i=1～6); BF _2iThe output of (i=1～6) is connected on MS successively respectively _2iThe Q output of (i=1～6), BF _2iThe output of (i=1～6) is received power tube QA by coupling resistance 360 Ω respectively successively _2iThe base stage of (i=1～6);

Described power tube QA _1i(i=1～6) and QA _2i(i=1～6) are positive-negative-positives, and emitter-base bandgap grading all meets positive supply+V, and collector electrode connects the direct current common port by 10K Ω resistance; QA _1i(i=1～6) collector electrode is received the special-purpose drive circuit piece of GTO DRC successively respectively _iThe unblanking pulse control end ONC of (i=1～6), wire size respectively is 110,120,130,140,150 and 160; QA _2i(i=1～6) collector electrode is received DRC successively respectively _iThe shutoff pulse control end OFFC of (i=1～6), wire size respectively is 210,220,230,240,250 and 260; DRC _i(i=1～6) with; Power tube QAi _1i, QA _2i(i=1～6) have identical direct current common port, DRC _iThe pulse output of (i=1～6) and control end ONC, OFFC, be that electricity is isolated between the direct current common port, when ONC is high level, DRC output unblank trigger impulse, when OFFC was high level, it was the shutoff trigger impulse that is turned off the GTO element anode current 1/3rd of triggering that DRC exports 40 microsecond wide cut degree.

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