CN201708694U - Integrated high-power choppers and high-frequency switch power supply - Google Patents

Abstract

The utility model relates to integrated high-power choppers, and each integrated high-power chopper comprises a plurality of high-power choppers which are mutually and parallelly connected; in each high-power chopper, a plurality of high-power IGBT modules, a filter capacitor and a cooling device form an easily disassembling overall box-type part structure, and the gate of each high-power IGBT module is connected with a PWM control circuit board; the high-power IGBT modules, the cooling device and the filter capacitor are fixedly arranged in a first box body in a centralized way; and the PWM control circuit board is arranged in a second box body; and a plurality of openings are arranged in the first box body, so that the electrode conductor of the collector of each IGBT module and the electrode conductor of the filter capacitor can be exposed from the first box body, and the pipe interface of the cooling device is exposed from the first box body through the openings. A high-frequency switch power supply comprises a non-controlled rectifier and a filter circuit which is connected with the non-controlled rectifier; a plurality of integrated high-power choppers are arranged and are mutually and parallelly and/or serially connected; and the cooling devices of the integrated high-power choppers are connected with cooling medium pipes.

Description

Integrated high-power chopper and high frequency switch power

Technical field

The utility model relates to a kind of high-power chopper and high frequency switch power, particularly can suppress the integrated high-power chopper of switch burr and electromagnetic interference, and the high frequency switch power of using this high-power chopper.

Background technology

The high power DC chopper voltage stabilizer typically refers to: power output is tens of kilowatts---number megawatt, even more high-power high frequency switch power.This high power DC stabilized voltage power supply can be widely used in fields such as induction heating, metallurgy, mining, can satisfy high power DC electric machine speed governing and high-power communication and scientific research field application demand, for example: industrial occasions such as MW class long wave emission to large power supply.Especially aspect the medium-high frequency induction heating, the application of high power DC stabilized voltage power supply is very general.For example: in the occasion of medium-high frequency steel pipe welding, the high power DC stabilized voltage power supply is normally used for providing powerful direct current energy and heating Power Regulation purposes to inverter, do inversion by inverter after, export to welding or Equipment for Heating Processing.In the past, the HF switch electric energy of high power DC stabilized voltage power supply output mainly was by the rectifier bridge that high-power silicon controlled rectifier constitutes the three-phase main-frequency communication power supply to be carried out rectifying and pressure-regulating to obtain.Because controllable silicon belongs to the phase-shift voltage regulating device, use high-power silicon-controlled rectifying will inevitably cause power factor to descend.In order to improve power factor, reduce harmonic pollution in electric power net, improve the meritorious efficient of power supply, need reactive-load compensation equipment be set in transformer station's increase usually with electric unit, but can increase extra fund input like this.

In recent years, along with entire society to saves energy, requirements such as minimizing electric network pollution improve constantly, industry adopts pulse-width modulation (Pulse Width Modulation more and more, be called for short: PWM) technology, (Insulated Gate Bipolar Transistor is called for short: IGBT manufacturing high power DC stabilized voltage power supply to adopt the high-power insulated gate bipolar transistor; Wherein, IGBT is used to the buck circuit (Buck chopper) of high power DC stabilized voltage power supply, is core executive component wherein.The D.C. regulated power supply that this employing IGBT constitutes comes down to a kind of Switching Power Supply, and the voltage waveform of its output is a square wave.Adopt D.C. regulated power supply that IGBT makes than the DC power supply of using controllable silicon to make, employing be non-phase control rectifier supply power mode, its influence for electrical source power factor is very low, little to the wave distortion influence of electrical network, voltage regulation performance is better.Therefore, adopting IGBT to make Switching Power Supply is the development trend of high power DC stabilized voltage power supply.

Referring to Fig. 1, it is a schematic diagram one typical, that adopt the Switching Power Supply that high-power IGBT constitutes.Wherein, IGBT module 2 and capacitor 1 connect into buck single module high-power chopper 9.The input electric energy of this single module high-power chopper 9 is provided by external direct voltage source 8.In concrete industrial occasions, this external direct voltage source 8 normally three-phase main-frequency alternating current obtains after not controlling the rectifier bridge rectification through high-power.This is not controlled rectifier bridge and adopts the power rectifier diode to constitute usually.The pwm control signal of pwm control circuit plate (not shown) output is carried out switch motion through the control end that a resistance Rg is connected to IGBT module 2 with control IGBT module 2.IGBT module 2 is connected and composed by IGBT, sustained diode and blocking diode Dr.Wherein, sustained diode and IGBT are serially connected with on the major loop; When sustained diode disconnects at IGBT, bear the afterflow task of output current; Blocking diode Dr and IGBT reverse parallel connection.Circuit shown in Figure 1 when operate as normal, between the output 6,7 between the DirectCurrent Voltage Ratio input 4,5 of output the direct voltage of input lower, so the blocking diode Dr of IGBT bears reverse voltage and blocks.

Both having made is powerful IGBT, and owing to reasons such as device technology and heat radiations, its power output also is limited, and the electric current that passes through of common single IGBT has only hundreds of amperes.And in some industrial applications, single IGBT module can not satisfy high power output requirement.Therefore, industry usually adopts a plurality of single module high-power choppers 9 to carry out parallel connection, constitutes high-power chopper 10 as shown in Figure 2, so that bigger power output to be provided.Referring to Fig. 2, this high-power chopper 10 mainly is to constitute by single module high-power chopper shown in Figure 19 is parallel with one another.Wherein, mainly be to adopt copper polar plate, the input 4,5 of a plurality of single module high-power choppers 9 is connected with each other respectively, simultaneously that the output 6,7 of those single module high-power choppers 9 is connected with each other respectively; Constitute high-power chopper 10 thus.

By Fig. 1, Fig. 2 as can be seen: above-mentioned single module high-power chopper 9 or high-power chopper 10 are being born whole power loads in high power switching power supply, has the voltage height at some, electric current is big, and the industrial applications of gradient steep (changing suddenly) characteristics, for example: aspects such as medium-high frequency welding, high power DC electric machine speed governing, guaranteeing IGBT at high voltage (more than hundreds of volts), can reliability service be very difficult under the condition of big electric current (more than hundreds of peaces).

In the great power conversion circuit technology was used, transistors such as IGBT bore the limited in one's ability of overvoltage overcurrent, and its overcurrent amplitude is generally 2 times of rated value, and it is also shorter to bear time of overcurrent, only is about 1 millisecond usually; And bearing aspect the overvoltage, IGBT can not bear the impact that is higher than nominal voltage.For the overvoltage that prevents the IGBT device damages, should reduce the wiring inductance parameter of main circuit line as far as possible.But, owing to the current capacity that single IGBT can provide limited (only hundreds of ampere), provide the load capacity of bigger rated current, in fact must be with a plurality of single IGBT use in parallel.Because the parameter discrete of semiconductor device, IGBT device can produce uneven the pressure and not current-sharing when in parallel, and can threaten IGBT safety by the excessive switch spike voltage of unreasonable generation because major loop connects up.Referring to Fig. 3, its for adopt oscillograph recording to, output rated voltage is that the common chopper circuit of 240V is under 60% left and right sides rated voltage (about 150V), current capacity situation, the spike surge voltage that occurs when the IGBT device turn-offs (for this surge voltage, be called: waveform photo burr) by industry also custom.Abscissa express time among Fig. 3, ordinate is represented voltage magnitude; Wherein, on the ordinate direction, each little lattice is represented the voltage magnitude of 50V.As can be seen from Figure 3: only under the situation of about 60% load, the amplitude of turn-offing burr is bigger, for about 230V; Along with load current increases, burr can continue to increase, even exceeds the voltage that IGBT can bear.Obviously, this can threaten the security of operation of IGBT device.

In order to solve the excessive problem of above-mentioned burr amplitude, the way that industry is general is to adopt the fast Absorption buffer circuit to protect in the load major loop.But, in the often frequent application scenario that changes significantly of some loads, for example: high-frequency welding, DC motor speed-regulating etc., the effect of this means and limited.Based on above-mentioned all odjective causes; the high-power chopper that existing employing IGBT makes usually can still can be worked when load is lower; in case when load was increased near nominal load, it was excessive IGBT device Yin Maoci to occur, and causes permanent damage.Therefore, use IGBT to produce the high high-power chopper of reliability, objectively be difficult to realization.Up to the present this also be, industry does not also have the extensive main cause of making and using the high power DC Switching Power Supply that is made of the IGBT device.For this reason, some research institutions once carried out discussion specially in the technical papers of specialty, think: in the application scenario of high voltage, big electric current, the IGBT module is nothing like silicon controlled running status stability; But, as mentioned above:, certainly will cause adverse effects such as power factor reduction if use controllable silicon to make high-power chopper.Therefore, the problem of solution IGBT module operational reliability, fail safe is the target that industry is being made great efforts always.

The inventor is in making process of the present utility model, find through further investigation: although Fig. 1, circuit shown in Figure 2 can be realized on principle, to be electrically connected errorless be far from being enough but only be satisfied with, the reason of a lot of power of chopping exploitation failures is not the circuit design mistake, but the critical power ratio component placement of power main circuit and connection technological design are unreasonable, cause excessive switch burr, (Electromagnetic interference is called for short electromagnetic interference: existence EMI), (ElectroMagnetic Compatibility is called for short: EMC) can not meet the demands Electro Magnetic Compatibility.

Referring to Fig. 4, in the prior art, when the high-power chopper shown in the shop drawings 1,2, general only based on general cooling, conductive bus-bar line arrangement requirement, adopt and separate the mode of installing, parts such as a plurality of IGBT modules 2, pwm control circuit plate 60 are arranged in the Switching Power Supply cabinet 80; Wherein, in order to guarantee heat radiation, IGBT module 2 is arranged on (not shown) on the cooled plate usually; In such layout designs, properly do not consider aforementioned burr, problems such as EMI, EMC, the layout of IGBT module 2 constant power parts in Switching Power Supply cabinet 80 carried out the specific aim design, the distributed constant that causes the copped wave major loop thus is because of the big variation of stray inductance, the burr that causes increases with the increase of load current, threatens the safety of IGBT.

The utility model content

Aspect of the utility model provides a kind of integrated high-power chopper, it has the integrated structure that can suppress switch burr and electromagnetic interference, has the integrated structure high-power chopper, can be integrated a plurality of IGBT modules of connecting of series-parallel system, and then improve the power output of whole chopper, the unitary member structure that formation is convenient to install simultaneously can suppress the influence to the IGBT module of electromagnetic interference, burr with less distributed inductance, guarantees the security of operation of whole chopper.

In order to realize above-mentioned utility model purpose, the utility model provides such class integrated high-power chopper, and it is made of a plurality of high-power choppers parallel with one another.Wherein, so-called high-power chopper is connected and composed by high-power IGBT module, filter capacitor and cooling device.Aspect electric, the grid of high-power IGBT module connects the pwm control signal of pwm control circuit plate.In configuration aspects, high-power IGBT module and cooling device and filter capacitor concentrated area be installed in can first casing of shield electromagnetic interference in, the distributed inductance parameter that makes main circuit connect reduces significantly; Aforementioned pwm control circuit plate then be arranged on can second casing of shield electromagnetic interference in.On first casing, be provided with a plurality of perforates, like this, connect the electrode conductor of IGBT module output, can be based on the setting of these perforates, be exposed to outside first casing, so that aforementioned these electrode conductors are connected with DC power supply input, output cable or the terminal of high frequency switch power.In addition, the pipe interface of carrying coolant that is used to connect that is provided with on the cooling device is also exposed by first casing via aforesaid perforate.

Above-mentioned integrated high-power chopper, in terms of existing technologies, exactly high-power IGBT module and forceful electric power parts concentrated areas such as cooling device and filter capacitor are installed in can first casing of shield electromagnetic interference in, with the pwm control circuit plate be arranged on can second casing of shield electromagnetic interference in.Like this, make that on the one hand extraneous electromagnetic interference can cause any interference to parts in first casing and second casing and circuit hardly, thereby can suppress electromagnetic interference reliably, reduce the amplitude of burr greatly, guarantee the security of operation of whole chopper; On the other hand, based on this safe and reliable integrated high-power chopper, can adopt mode parallel with one another and/or series connection that a plurality of integrated high-power choppers are linked together, constitute integrated chopper with bigger power output, can satisfy more than tens of kilowatts in the direct-current switch power supply demand, can guarantee that the active power of power supply can not reduce on the one hand, also can reduce even exempt the investment that spends because of power back-off with electric unit simultaneously.

Another aspect of the present utility model provides a kind of high frequency switch power that adopts above-mentioned integrated high-power chopper, it adopts has the integrated structure high-power chopper and makes, the high power DC Switching Power Supply that is suitable for commercial Application can be provided safely, effectively, can improve simultaneously the meritorious efficient of power supply, saving or reduction are because of the fund input of reactive power compensation.

In order to realize the purpose of second aspect of the utility model, the utility model provides such class to comprise the high frequency switch power of above-mentioned integrated high-power chopper; Comprising the not control rectifier that is used for power frequency AC is carried out rectification, connect this not filter circuit of control rectifier; Aforesaid integrated high-power chopper is a plurality of, and parallel with one another and/or be connected in series; The cooling device of integrated high-power chopper is connected with the coolant transfer pipeline.

In view of the advantage of above-mentioned integrated high-power chopper with respect to prior art, high frequency switch power of the present utility model can be guaranteed security of operation; Meanwhile, based on above-mentioned safe and reliable integrated high-power chopper, adopt mode parallel with one another and/or series connection that a plurality of integrated high-power choppers are linked together, just can obtain to have the high frequency switch power of bigger power output, can satisfy more than tens of kilowatts in the direct-current switch power supply demand, can guarantee that the active power of power supply can not reduce on the one hand, also can reduce even exempt the investment that spends because of power back-off with electric unit simultaneously.

For making the utility model help more understanding,, technical schemes more of the present utility model are described in further detail below in conjunction with some embodiment and accompanying drawing.

Description of drawings

Fig. 1 is the schematic diagram that adopts the high-power chopper of high-power IGBT formation;

Fig. 2 is the schematic diagram by the chopper shown in Figure 1 high-power chopper that constitutes parallel with one another;

Fig. 3 is the waveform photo of common chopper circuit that oscilloscope shows surge voltage when turn-offing the IGBT device;

Fig. 4 is that chopper separates the schematic diagram that is provided with in the prior art in power cabinet;

Fig. 5 is the schematic diagram of integrated high-power chopper first casing of the utility model;

Fig. 6 is the schematic diagram of integrated high-power chopper second casing of the utility model;

Fig. 7 is the waveform photo of the utility model first execution mode chopper output 150V direct voltage of oscilloscope demonstration;

Fig. 8 is the waveform photo of the utility model first execution mode chopper output 240V direct voltage of oscilloscope demonstration;

Fig. 9 is that the integral body of integrated high-power chopper in another execution mode of the utility model is launched schematic diagram;

Figure 10 is the inner critical piece structural relation of a reflection Fig. 9 schematic diagram;

Figure 11 is the first box house parts assembly structure schematic diagram in Fig. 9;

Figure 12 is the schematic diagram of the complete assembling of integrated high-power chopper shown in Figure 9;

Figure 13 is the whole deployed configuration schematic diagram of integrated high-power chopper in the another embodiment of the utility model;

Figure 14 is the schematic diagram of the complete assembling of integrated high-power chopper shown in Figure 13.

Embodiment

Referring to Fig. 5 and Fig. 6, a class execution mode of the integrated high-power chopper of the utility model specifically comprises: two can shield electromagnetic interference casing, first casing 40 and second casing 41; Wherein, fixedly install a plurality of high-power chopper (not shown) parallel with one another in first casing 40 compactly, these high-power choppers are made of high-power IGBT module, filter capacitor and cooling device.The pwm control circuit plate 60 that is used to produce pwm control signal is arranged in second casing 41 shown in Figure 6.

Owing to be mounted on the electrode conductor 55,57 and the electrode conductor 61,62 that is connected filter capacitor of the high-power IGBT module output of first casing 40, the pipe interface 48a that connects cooling device need expose first casing 40, so that these parts are connected with other circuit or coolant pipeline, on first casing 40, offer a plurality of perforate 40a, 40b.

In addition, in order to reduce distributed inductance,, the common port that is input between the output of DC power supply in first casing and the integrated high-power chopper of the utility model can be connected in same inner conductor, for example: the electrode copper coin at first box house; But connect at the two ends of this battery lead plate respectively.With the present embodiment is example: the electrode conductor 62 of supposition filter capacitor connects the negative pole of input DC power, the negative pole connection electrode conductor 55 of high-power IGBT module output.In first casing, 40 inside, electrode conductor 62,55 is connected in the two ends of same electrode copper coin; That is: the common port of DC power supply input with chopper output separately is connected.Do the spike burr that can significantly reduce integrated high-power chopper like this.

Aforesaid high-power IGBT module each other and and pwm control signal between electric connecting relation same as the prior art.Separate with second casing 41 when being provided with at first casing 40, because high-power IGBT module and pwm control circuit plate branch are in the first separate casing 40 and second casing 41, therefore, on first casing 40 and second casing 41, also need to offer respectively via hole 40b, 41b, pass this via hole 40b, 41b so that connect the lead of the pwm control signal of IGBT module grid and pwm control circuit plate, guarantee that pwm control signal can be connected to the high-power IGBT module.

The utility model above-mentioned can first casing 40 of shield electromagnetic interference in, concentrate, be provided with compactly and constitute high-power IGBT module, filter capacitor and cooling device.Like this structure is set, guaranteed that on the one hand the high-power IGBT module under the operating state of rated power output, still can access sufficient cooling.Simultaneously, of paramount importancely be: the electromagnetic interference environment that produces in IGBT module and the high frequency switch power cabinet is kept apart, electromagnetic interference shield outside first casing 40, is improved the structure of chopper distributed constant, reduced the amplitude of surge voltage (burr) significantly.In addition and since the pwm control circuit plate that will produce pwm control signal be arranged at can second casing 41 of shield electromagnetic interference in, make aforesaid electromagnetic interference fall minimumly as much as possible to the influence of weakness parts such as pwm control circuit plate.

Referring to Fig. 7, the waveform photo when it exports the 150V direct voltage for the integrated high-power chopper that adopts the above-mentioned embodiment of the utility model to make.The 150V VD only is about 60% of a rated output voltage in above-mentioned embodiment.Why selecting the 150V output voltage to test, is directly to compare for the burr with prior art chopper output noted earlier.As can be seen from Figure 7: export the direct voltage of 150V equally, the amplitude of the integrated high-power chopper IGBT of the utility model module upper punch burr when opening when turn-offing, only is about 25V towards burr only for about 20V down.And the common chopper circuit of prior art is under the situation of 60% left and right sides rated voltage (about 150V), and following when it turn-offs reaches about 230 towards burr, is equivalent to about 11 times of the integrated high-power chopper burr of the utility model amplitude.This shows, adopt the common chopper of the high-power chopper of integrated structure manufacturing of the present utility model, suppressing to have very remarkable advantages aspect the burr than prior art.

Please further referring to Fig. 8, the waveform photo that it records during for integrated high-power chopper output 240V direct voltage of adopting the above-mentioned embodiment of the utility model to make (at full capacity, that is the most abominable ruuning situation).From the shown waveform of Fig. 8 as can be seen: upper punch burr and following when turn-offing of the integrated high-power chopper of the utility model when the IGBT module is opened is about 25V towards burr.This explanation: the major loop distributed constant (stray inductance) of the integrated high-power chopper of the utility model is very little, makes that burr has obtained very well suppressing.

Referring to Fig. 9,10,11,12, it is the assembly structure detailed maps of the another embodiment of the integrated high-power chopper of the utility model.This integrated high-power chopper is mainly by first casing and inner high-power IGBT module 49, cooling device 48, filter capacitor and electrode conductor 61,62,55,57 thereof, and close fit such as second casing 45 constitutes.

Referring to Fig. 9, first casing 40 is made of the first tank skirt 40x and base plate 46 on the whole; Slide rail 46a and slideway 40d are set respectively on the first tank skirt 40x and base plate 46, win tank skirt 40x and base plate 46 can be slidingly connected mutually by means of slide rail 46a and slideway 40d.

Referring to Figure 10, Figure 11, IGBT module 49, cooling device 48, filter capacitor and electrode conductor 61,62,55,57 etc. are installed on the base plate 46; Wherein, a plurality of IGBT modules 49 are fixed on the cooling device 48 side by side, and the radiating surface of IGBT module 49 fits on the heat-exchange surface of cooling device 48, constitute power cell.The emitter of a plurality of IGBT modules 49 is by copper coin 50 connections parallel with one another, and copper coin 50 further is connected in electrode conductor 57 through copper coin 58 again; This electrode conductor 57 is the positive electrode output 6 in the chopper circuit shown in Figure 1.Filter capacitor is by a plurality of electric capacity 54 parallel connections; Wherein, first electrode of electric capacity 54 is connected in first conductive plate, also is positive plate 53, and second electrode of electric capacity 54 is connected to second conductive plate, also is negative plate 51; Be folded with insulation board 52 between positive plate 53 and the negative plate 51, to prevent positive plate 53 and negative plate 51 short circuits.Then be connected respectively to positive plate 53 and negative plate 51 from the positive and negative electrode of control rectifier direct-current input power supplying not by electrode conductor 61,62.Negative plate 51 also is connected with electrode conductor 55, constitutes the negative electrode of integrated high-power chopper output in the present embodiment.Electrode conductor 61,62 mutually insulateds connect conductive plate 62a on electrode conductor 62, be used to make negative plate 51 to be connected with electrode conductor 62.Each parts that are provided with in above-mentioned first casing 40, all be fixedly arranged on the base plate 46 directly or indirectly, for the pipe interface 48a that can make electrode conductor 61,62,55,57 and connection cooling device can expose first casing 40, on base plate 46, also be provided with perforate 46b and 46c.In addition, in order to strengthen to being arranged on the mechanical support power of each parts on the base plate 46, all right fixed insulation plate 63 on base plate 46.In order further to strengthen mechanical support power, shown in Figure 10,11, can set up supporting bracket 59 to cooling device 48.Each above-mentioned conductive electrode can use copper coin or be similar to metal or the alloy formation that copper, silver etc. have excellent conductive performance.

Referring to Fig. 9, Figure 10, second casing 41 is to be made of a grooved face shield 45 plates on the whole, in these grooved face shield 45 plates, set firmly pwm control circuit plate 60, in addition, also be provided with on the channel profile cover plate 45 and be used for the channel profile cover plate 45 and the first tank skirt 40x are fixedly coupled the 41a of portion.

When concrete the installation, by the fixed part 40c on the first tank skirt 40x the first tank skirt 40x is fixed in appointed positions in the power cabinet earlier usually; Then, will fixedly mount the base plate 46 aforesaid slide rail 46a of process and the slideway 40d of each parts such as IGBT module 49, cooling device 48, be slidingly installed within first tank skirt that is fixed to assigned address in the power cabinet also fixing.Need to prove: being connected between the first tank skirt 40x and the base plate 46, except adopting the above-mentioned mode that is slidingly connected, can also adopt the mode of fastening to connect, the buckle of mutual coupling promptly is set respectively at the first tank skirt 40x and base plate 46; Can certainly select to screw togather and wait other any first tank skirt 40x can connections with the mode that base plate 46 firmly connects as one.At last, after the pwm control signal of pwm control circuit plate 60 connected each IGBT module 49 respectively, via the connecting portion 41a on second casing 41 second casing 41 is fixed on first tank skirt, forms integrated high-power chopper as shown in figure 12.Equally, first tank skirt also can adopt the above-mentioned first tank skirt 40x to fixedly connected with the connected mode between the base plate 46 with the channel profile cover plate 45 of above-mentioned second casing 41.

Referring to Figure 10 and Figure 11, be provided with a plurality of open-work 51a at negative plate 51 near the zone at the edge of conductive electrodes 55, and open-work 51a outside avris, be provided with disconnection breach 51b.The branch balancing of electric current on each IGBT module 49 that is arranged so that negative plate 51 outputs of these open-works 51a and disconnection breach 51b, and can obtain better to suppress the burr effect.

Above-mentioned first casing 40, second casing 41 that can shield electromagnetic interference should be made by the material with good magnetic property; Because steel plate, expanded metal lath, in be provided with steel mesh sheet material, sheet alloy etc. have good magnetic conduction effect, can be used for making aforesaid first casing and second casing.Particularly steel plate and expanded metal lath belong to cheap, are easy to obtain and processing and manufacturing, have the material of sufficient intensity, are particularly useful for integrated high-power chopper of the present utility model.

In the above-described embodiment, second casing 41 only adopts a channel profile cover plate 45 to be fastened on the first tank skirt 40x.This belongs to and is connected fairly simple a kind of mode with second casing and first casing are integrated.According to concrete power cabinet designing requirement and with strong, weak electricity actual needs such as separately, also second casing can be separated setting with first casing.Like this, just need individually two casings to be adopted above-mentioned made with good magnetic property respectively.They can adopt the mode that is slidingly connected or is fastened and connected to constitute respectively.

Launch the schematic diagram that schematic diagram and assembling are finished referring to Figure 13,14 its overall structures for integrated high-power chopper in this another embodiment of the utility model.With the difference of the integrated high-power chopper shown in Fig. 9-12 be: the integrated high-power chopper shown in Fig. 9-12 is made up of two groups of power cells and two groups of filter capacitors, and its integrated level is higher.And have only one group of power cell and one group of filter capacitor among Figure 13,14, structure is simple relatively.

Among Figure 13, the structure of filter capacitor and power cell is basic identical in filter capacitor and power cell and the described execution mode of earlier figures 9-12.A plurality of IGBT modules 49 are fixed on the cooling device 48 side by side, and cooling device 48 is provided with the pipe interface 48a that exposes first casing; And the radiating surface of IGBT module 49 fits on the heat-exchange surface of cooling device 48, constitutes power cell.The emitter of a plurality of IGBT modules 49 is by copper coin 24 connections parallel with one another, and copper coin 24 further is connected to copper coin 25 again, forms the positive electrode output 6 in the chopper circuit shown in Figure 1.Filter capacitor is by a plurality of electric capacity 54 parallel connections; Wherein, first electrode of electric capacity 54 is connected in first conductive plate, also is positive plate 53, and second electrode of electric capacity 54 is connected to second conductive plate, also is negative plate 51; Be folded with insulation board 52 between positive plate 53 and the negative plate 51, to prevent positive plate 53 and negative plate 51 short circuits.Connect above-mentioned positive plate 53 and negative plate 51 respectively from the both positive and negative polarity of control rectifier direct-current input power supplying not.Negative plate 51 is connected with copper coin 26, constitutes the negative electrode of integrated high-power chopper output in the present embodiment, and copper coin 25 constitutes the positive electrode of integrated high-power chopper output.Each above-mentioned conductive electrode can use copper coin or be similar to metal or the alloy formation that copper, silver etc. have excellent conductive performance.

In the present embodiment, first casing is by end plate of outer cover 20,21, and supporting plate 18,19 connects and composes.The inboard that insulation board 22,23 is installed end plate of outer cover 20,21 is to strengthen the mechanical strength of 20,21 of end plate of outer cover.Cooling device 48 is arranged on the supporting plate 18, and the pipe interface 48a that connects cooling device is arranged on the cooling device 48, and exposes via the perforate 46b on the end plate of outer cover 20.Whole first casing can be affixed in the power cabinet by supporting plate 18,19.

Second casing 41 of present embodiment also is to be connected and composed by a trough plate and cover plate (not shown).Pwm control circuit plate 60 is fixedly installed in the trough plate, trough plate is provided with via hole 41b towards the bottom of second casing, its effect is that the lead of the pwm control signal that connects IGBT module 49 grids and pwm control circuit plate 60 is passed, and guarantees that pwm control signal can be connected to high-power IGBT module 49.Trough plate can be connected with end plate of outer cover 20,21 by means of its bottom, is fixed together.

Above-mentioned cooling device 48 specifically can adopt water-filled radiator, certainly, also can be the radiator that adopts modes air-cooled or other liquid cools to constitute, 49 applyings be provided with as long as corresponding cooling device 48 can be applicable to the IGBT module, and good heat radiating gets final product.

Each integrated high-power chopper that above-mentioned each embodiment is disclosed, since the high-power IGBT concentrated area can both be arranged on can first casing 40 of shield electromagnetic interference in, this concentrating, compactness is provided with and constitutes the high-power IGBT module, filter capacitor and cooling device structure is set, guaranteed that on the one hand the high-power IGBT module is under the operating state of rated power output, still can access sufficient cooling, simultaneously, inevitable electromagnetic interference environment in IGBT module and the high frequency switch power cabinet is kept apart, with electromagnetic interference shield outside first casing 40, improve the structure of chopper distributed constant, reduced the amplitude of surge voltage (burr) significantly.In addition and since the pwm control circuit plate that will produce pwm control signal be arranged at can second casing 41 of shield electromagnetic interference in, make aforesaid electromagnetic interference fall minimumly as much as possible to the influence of weakness parts such as pwm control circuit plate.Especially shown in Fig. 9-12, adopt multi-channel parallel and symmetrical expression process layout, the current balance of each IGBT module is guaranteed, adopt such structure, make distributed constant can be fallen very lowly, the chopper that helps using the IGBT module to make obtains tens of kilowatts to the number megawatt, even higher power output.

Load current hundreds of ampere in addition on the DC chopper of kiloampere, adopt the independent box mounting structure of above-mentioned similar frequency converter formula, especially adopt the high-power copped wave DC power supply of many IGBT module parallel connection, help realizing mass, standardized production, the structure that helps the rational deployment main element, improve the electromagnetic compatibility index, make the chopper steady operation.In addition, the utility model adopts integrated design, and the buck chopper device is manufactured the application component of an integral body, as a separate unit or standardized component, cooperates aerial lug just can realize required function easily in regulator cubicle; Be convenient to the installation and maintenance of high-power chopper, can guarantee the Electro Magnetic Compatibility and the mechanical strength of switch power supply equipment integral body.And adopt similar slide rail, slideway etc. to be similar to the drawer type assembly, and make that high-power chopper can be when obtaining full protection cabinet, compact conformation, be easy to realize that single casing two-way or multichannel assembly are installed in parallel.

Based on above-mentioned integrated high-power chopper, the utility model can also provide a kind of powerful high frequency switch power, and this high frequency switch power specifically is interconnected to constitute by rectifier, integrated high-power chopper.

This rectifier mainly is to be made of the high-power rectifier bridge of not controlling usually, and this input of not controlling rectifier bridge connects the three-phase main-frequency alternating current, its output through the filter circuit that mainly constitutes by inductor after, be transported to aforesaid integrated high-power chopper.Implement about rectifier and filter circuit etc. can adopt prior art, the utility model is not done too much giving unnecessary details at this.

This integrated high-power chopper mainly is made of a plurality of IGBT module series connection in inside and/or parallel connection, and whole high frequency switch power can be connected and/or parallel connection mutually by several integrated high-power choppers, constitutes the bigger high frequency switch power of power output.Wherein, mainly be in order to obtain higher output voltage with the series connection of a plurality of IGBT modules or integrated high-power chopper; And with a plurality of IGBT modules or integrated high-power chopper parallel connection, mainly be in order to obtain bigger output current.Owing in the integrated high-power chopper of the present utility model cooling device is set all, therefore, in high frequency switch power, also need with carrying the pipeline of coolant to be connected on the cooling device that is provided with in the integrated high-power chopper, so that enough cooling effects to be provided.

In view of above-mentioned integrated high-power chopper can effectively, stably work in rated voltage, therefore, industry can be utilized technical scheme provided by the utility model, when the power output of direct current high frequency switch power is increased substantially, stable, the operation reliably of high frequency switch power can also be made, the demand of various corresponding industrial occasions can be satisfied.Industry can thoroughly be broken away from the DC power supply of using controllable silicon to make simultaneously, avoids puzzlements such as power factor reduction, power pollution, when improving power consumption efficiency, can also reduce or exempt the investment that spends because of the reduction of offset supply power factor.

Claims (10)

1. integrated high-power chopper, comprise the high-power chopper that connects dc supply input, described high-power chopper is made of high-power IGBT module, filter capacitor and cooling device, and the grid of described high-power IGBT module connects the pwm control signal of pwm control circuit plate; It is characterized in that:

Described high-power IGBT module, cooling device and filter capacitor concentrate be installed in can first casing of shield electromagnetic interference in; Described pwm control circuit plate be arranged on can second casing of shield electromagnetic interference in;

Described first casing offers a plurality of perforates, make the electrode conductor that connects IGBT module output, and the electrode conductor that connects filter capacitor can expose by described first casing, and described cooling device connect, be used to carry the pipe interface of coolant to expose by described first casing via described perforate.

2. integrated high-power chopper according to claim 1 is characterized in that: described high-power IGBT module is fixedly arranged on the described cooling device, constitutes power cell with described cooling device.

3. integrated high-power chopper according to claim 1, it is characterized in that: the common port of described dc supply input and described IGBT module output is set to same inner conductor at described first box house, and the electrode conductor that connects described IGBT module and an electrode conductor that is connected described dc supply input are connected to the two ends of described inner conductor.

4. integrated high-power chopper according to claim 1, it is characterized in that: described filter capacitor is by a plurality of electric capacity parallel connections, first electrode of described electric capacity, second electrode connect first conductive plate and second conductive plate respectively, and mutually insulated between first conductive plate and second conductive plate; The electrode conductor of described filter capacitor comprises the first capacitance electrode conductor and the second capacitance electrode conductor, and the described first capacitance electrode conductor connects described first conductive plate, and the described second capacitance electrode conductor connects described second conductive plate.

5. integrated high-power chopper according to claim 4 is characterized in that: described first conductive plate or the submarginal zone of second conductive plate are provided with a plurality of open-works, and outside described open-work avris, be provided with breach.

6. integrated high-power chopper according to claim 1, it is characterized in that: described can shield electromagnetic interference first casing and/or second casing that can shield electromagnetic interference, by the steel plate with good magnetic property, expanded metal lath, in be provided with steel mesh sheet material and/or sheet alloy constitute.

7. according to claim 1 or 6 described integrated high-power choppers, it is characterized in that: described first casing is made of first cover body and first base plate, described first cover body adopts rail structure slidably to be connected with first base plate, perhaps adopts fastening structure to be fastened and connected; Described high-power IGBT module, cooling device and filter capacitor are concentrated and are installed on described first base plate; Described first cover body or first base plate are provided with and are used to connect this first cover body or first base plate syndeton in the power supply cabinet.

8. according to claim 1 or 6 described integrated high-power choppers, it is characterized in that: described second casing is made of second cover body and second base plate, described second cover body adopts rail structure slidably to be connected with second base plate, perhaps adopts fastening structure to be fastened and connected; Described pwm control circuit plate is arranged on described second base plate; Described second cover body or second base plate are provided with and are used to connect this described second cover body or second base plate syndeton on the power supply cabinet or first casing.

9. integrated high-power chopper according to claim 1 is characterized in that: described second Box Cover is located on first casing; Perhaps, described first casing separates setting with second casing, and offers via hole on described first casing and/or second casing, and this via hole is used to make the lead of the pwm control signal of the grid that connects described IGBT module and described pwm control circuit plate to pass.

10. high frequency switch power that comprises the described arbitrary integrated high-power chopper of claim 1-9; Comprise: be used for power frequency AC is carried out the not control rectifier of rectification, connect the filter circuit of described not control rectifier; It is characterized in that: described integrated high-power chopper is a plurality of, and parallel with one another and/or be connected in series; The cooling device of described integrated high-power chopper is connected with the coolant transfer pipeline.

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