CN105703689A - High-power brushless doubly-fed machine three-level bidirectional variable-frequency speed regulation system - Google Patents
High-power brushless doubly-fed machine three-level bidirectional variable-frequency speed regulation system Download PDFInfo
- Publication number
- CN105703689A CN105703689A CN201410686806.0A CN201410686806A CN105703689A CN 105703689 A CN105703689 A CN 105703689A CN 201410686806 A CN201410686806 A CN 201410686806A CN 105703689 A CN105703689 A CN 105703689A
- Authority
- CN
- China
- Prior art keywords
- level
- circuit
- pwm
- power
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a high-power brushless doubly-fed machine three-level bidirectional variable-frequency speed regulation system. The system is characterized in that the system consists of a brushless doubly-fed motor and a three-level dual-PWM alternating-current speed regulation system; and the three-level dual-PWM alternating current speed regulation system includes a brushless doubly-fed motor three-level PWM rectification unit and a brushless doubly-fed motor three-level inverter unit. According to the high-power brushless doubly-fed machine three-level bidirectional variable-frequency speed control system of the invention, in the main circuit structure of the three-level dual-PWM alternating current speed regulation system, as for each phase of bridge arm, four power devices are connected in series, and therefore, each power device bears lower voltage compared with a two-level main circuit structure; an rectification end adopts a three-level PWM rectifier, so that directional energy flow can be realized, and the recovery rate of energy can be improved, and the energy loss of the motor alternating-current speed regulation system can be decreased. The high-power brushless doubly-fed machine three-level bidirectional variable-frequency speed regulation system is suitable for high-voltage high-power motor driving application.
Description
Technical field
The present invention relates to the frequency conversion speed-adjusting system of a kind of brushless dual-feed motor, particularly to a kind of high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level, belong to Automated condtrol and numerical control field。
Background technology
Brushless dual-feed motor (referred to as BDFM) is a kind of novel AC induction motor。In its structure, stator terminal has the threephase stator winding of the separate different numbers of pole-pairs of two sets, is called power winding and controls winding。Powered by electrical network and variable-frequency power sources respectively。Two set stator winding share a set of unshakable in one's determination and do not have direct electromagnetic coupled。This motor structurally eliminates brush and slip ring, has the advantages such as simple in construction, sturdy and durable, power factor is adjustable。Motor has the rotor windings of a set of special construction。The various states such as rotor windings adopts special structure, and brushless dual-feed motor can run on synchronization, asynchronous and double-fed, therefore it has broad application prospects in the fields such as AC speed regulating governing system and variable speed constant frequency generator。The frequency conversion speed-adjusting system power factor of the double; two PWM structure of three level is adjustable, it may be achieved Two-way energy transfer, has that pressure degree is higher, output voltage waveforms quality advantages of higher simultaneously, it is adaptable to high-voltage large-capacity Alternating Current Governor System。At present, the research of brushless dual-feed motor design and control method has been had become as study hotspot。But owing to the more common AC induction motor structure of brushless double-fed motor model is complicated, therefore the exploitation of its Control system architecture and control algolithm has certain difficulty。
Summary of the invention
The purpose of the present invention is that the above-mentioned deficiency solving prior art, provides a kind of high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level and control method thereof after research and lot of experiments repeatedly。The present invention adopt three-level AC stream speed control system structure higher relative to two level block control accuracies, pressure better。Rectifier terminal adopts three-level PWM rectifier simultaneously, it is possible to achieve energy in bidirectional flow, improves energy recovery rate, reduces the energy loss of motor AC governing system, is suitably applied high-voltage high-power motor and drives occasion。
This high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level that the present invention provides, it is characterized in that this system is made up of the double; two PWM Alternating Current Governor System two large divisions of brushless dual-feed motor and three level, the double; two PWM Alternating Current Governor System of three level includes brushless dual-feed motor three-level pwm rectification unit and brushless dual-feed motor three-level inverter unit；
Described brushless dual-feed motor three-level pwm rectification unit: include control circuit Slab element, Hall element, rectifier terminal alternating voltage, current signal conditioning circuit unit, rectifier drive circuit unit；
Described brushless dual-feed motor three-level inverter unit: include converter main circuit unit, Hall element measure voltage & current unit, power winding alternating voltage, current signal conditioning circuit unit, control winding alternating voltage, current signal conditioning circuit unit, DC terminal voltage testing circuit unit, inverter driving circuit unit；
Wherein the power winding of brushless dual-feed motor connects common frequency power network, controls winding and connects Alternating Current Governor System；Three-level pwm rectification unit in Alternating Current Governor System connects common frequency power network and DC terminal electric capacity, it is unidirectional current by the AC rectification of common frequency power network, detection unit is connected common frequency power network by Hall element and gathers voltage and current information, signal after collection sends into the AD port of DSP in DSP control unit through the filtering of signal conditioning circuit, amplification, DSP calculates the pwm signal needed for rectification, pwm signal sends into drive circuit, and drive circuit controls the turn-on and turn-off of main circuit breaker in middle device according to pwm signal。To realize the switching process that AC rectification is direct current；
The AC current of common frequency power network after over commutation by the filter action of dc-link capacitance, send into three-level pwm inversion unit, inversion unit is respectively adopted Hall element and connects power winding terminal and control winding terminal, gather the voltage of power winding terminal, current signal, signal sends into signal conditioning circuit, amplify after filtering and send into DSP control unit AD port, dsp chip calculates the PWM ripple signal controlled needed for motor, pwm signal is sent into drive circuit, and drive circuit controls the turn-on and turn-off of main circuit switch device according to signal。To control motor。
Main circuit in the double; two PWM Alternating Current Governor System of three level is by three-level pwm rectification unit, DC terminal capacitor cell and three-level pwm inversion unit three part are constituted, rectifier terminal unit and inversion unit are respectively by main circuit unit, drive circuit unit, and signal deteching circuit unit is constituted。The stator winding end of brushless dual-feed motor is made up of power winding and control winding, and power winding is powered by common frequency power network, controls winding and is powered by the inversion unit of Alternating Current Governor System。
The Main Function of main circuit is that the alternating current realizing providing common frequency power network is converted into unidirectional current by three-level pwm fairing and realizes filtering by electric capacity, and being then passed through three-level pwm inverter bridge by unidirectional current rectification is frequency and the adjustable alternating current of voltage。Main circuit to include rectification, filtering and three unit of inverter circuit。System, control circuit is divided into rectifier terminal control circuit and inversion end control circuit。
Rectifier terminal control circuit is by electric current and voltage detecting circuit, electrical network end alternating voltage and electric current before detection rectification, deliver to DSP rectifier control circuit unit .DSP rectifier control circuit unit by outputting signals to drive circuit to realize the control of three-level pwm rectification main circuit by signal through modulate circuit filtering and amplification simultaneously。Finally realizing common frequency power network AC rectification is unidirectional current。
The unidirectional current filter action by electric capacity after over commutation, as the input of three-level pwm inversion unit。Realize unidirectional current rectification through three-level inverter and become the alternating current controlled needed for motor。The Hall element of inversion end gathers power winding and controls electric current and the voltage of winding。Electric current and voltage signal, after signal conditioning circuit, are fed to DSP control circuit。Control chip performs control algolithm, calculates torque and the magnetic linkage of motor according to detection electric current and voltage, by comparing its error。Obtain the PWM ripple controlled needed for motor。
1. inversion unit
Wherein the circuit of inversion unit is divided into the parts such as diode clamp type three-level inverter circuit, IGBT snubber circuit, charging current limiter circuit。In main circuit, every phase brachium pontis has 4 power devices, and 2 clamp diodes are constituted。Different on-off actions is coordinated with clamp diode so that each brachium pontis exports 3 kinds of voltage outputs by power device。
2. drive circuit
The drive circuit of power device adopts the PC929 chip that SHARP company of Japan produces, and chip has high speed, built-in short-circuit protection circuit, the feature such as easy to use, is that one is than more typical drive circuit chip。Electric current is driven to be 0.4A to the maximum；There is high-speed response time；Isolation voltage is up to 4kV, it is adaptable to the driving of Small And Medium Capacity IGBT。In based on the chip PC929 drive circuit built the 1 of PC929,2 pins connect pwm pulse through resistance, 3 pins connect pulse voltage, 10,14 pins connect the negative pole of power supply, positive pole connects 13 pins, and 12 pins are output stage feeder ear, and general and 13 pins connect altogether, 11 pins are outfan, switching tube is driven, if power is excessive, it is possible to through resistance R through resistance R66Connecing switching tube, 9 pins and peripheral circuit thereof after connecing amplifying circuit again and constitute protection circuit, when there being fault to occur, 8 pins meeting output low level signals, TLP521 internal illumination diode turns on, and produces high level signals at 3 pins, returns to main control chip。
Stabilivolt Z3 is by E point voltage clamper at 9V, and when inputting pwm pulse waveform and being low level, interior light emitting diodes turns on, and produces high level through optocoupler 11 pin, and the pressure drop with E point is 15V, through resistance R6Produce electric current, make switching tube turn on。When inputting pwm pulse waveform and being high level, Light-Emitting Diode ends, and produces the pressure drop of-9V between G, E, and switching tube ends。
3. ac voltage detection circuit
In order to meet control system to current detecting high speed and high-precision requirement, in system adopt be Lyme company produce Hall current sensor HBC10ES5 to detect stator current, current sensor HBC10ES5 is semicircle hollow, wire is traverse from middle circular hole, current signal can be measured, it is ensured that circuit safety when electric isolution。When there being electric current to pass through, its internal component can sense generation voltage signal automatically, by U0OUT pin output, HBC10ES5 is active device, must power before work, 1 pin V in deviceccFor its power supply, 2 pin ground connection, 3 pin direct voltage output signals.。
Its running voltage is ± 15V, and frequency bandwidth is 0-100kHz。The stator phase currents obtained due to sensor is the AC signal having positive and negative values, so needing the signal of sensor gained through voltage increase, signal is adjusted between 0-3.3V to meet the input standard of the AD interface of DSP, it is sent to again in the AD conversion module of DSP, motor control panel has the such current detecting passage of two-way, is respectively intended to detection motor A phase and C phase current。
Voltage detecting principle is identical with alternating current Cleaning Principle, and voltage sensor adopts and is both the LV28-P Hall voltage sensor that Lyme company produces, and it measures scope 10～500V, and former limit rated current is 10mA。
4. DC terminal voltage testing circuit
In main circuit, the stability of DC bus-bar voltage directly affects the performance of switching tube, it is therefore necessary to busbar voltage is collected in controller and is controlled by。Current signal is generally smaller, just can detect with Hall current sensor, and voltage signal is relatively larger, and high performance Hall voltage sensor involves great expense, impracticable。If the voltage signal of several hectovolts is input in controller after electric resistance partial pressure, Filtering Processing, if busbar voltage pulsation is relatively big, very easily controller is caused damage, have to power up in the middle of therefore air bound from。Using linear optical coupling TIL300 and LM324 to constitute voltage detecting circuit (Fig. 6) herein, in main circuit, the stability of DC bus-bar voltage directly affects the performance of switching tube, it is therefore necessary to busbar voltage is collected in controller and is controlled by。Current signal is generally smaller, just can detect with Hall current sensor, and voltage signal is relatively larger, and high performance Hall voltage sensor involves great expense, impracticable。If the voltage signal of several hectovolts is input in controller after electric resistance partial pressure, Filtering Processing, if busbar voltage pulsation is relatively big, very easily controller is caused damage, have to power up in the middle of therefore air bound from。
By voltage detecting circuit (Fig. 6) it can be seen that UDCThrough resistance R1、R2It is divided to 0 and arrives 3.3V, U1AFor voltage follower, the voltage signal after conversion is through U1ARear raising carrying load ability。U1BFor charge amplifying circuit, voltage signal inputs the 2 of TIL300 after this circuit and draws, 1 pin ground connection, and Light-Emitting Diode turns on, and TIL300 exports coupled voltages signal, through U1CExport after low-pass filtering。
Compared with prior art, beneficial effects of the present invention:
1., in brushless dual-feed motor three level two-way exchange governing system main circuit structure, every phase brachium pontis adopts four power device series connection。Compared with two level main circuit structures, it is less that each power device bears voltage, is therefore more suitable for high-power occasion。
2. in brushless dual-feed motor three level two-way exchange governing system, voltage vector is more, and therefore the waveform of inversion unit output is better。
3. brushless dual-feed motor three level two-way exchange governing system rectification unit and inversion unit all adopt pwm circuit structure, therefore can realize the four quadrant running of motor, it is possible to realize energy feedback, and power factor is close to 1, and harmonic content is less。
Accompanying drawing explanation
Fig. 1 is present system structured flowchart；
Fig. 2 is inverter structure circuit diagram of the present invention；
Fig. 3 is power device drive circuit figure of the present invention；
Fig. 4 is alternating current testing circuit figure of the present invention:
Fig. 5 is ac voltage detection circuit figure of the present invention:
Fig. 6 is DC voltage testing circuit figure of the present invention:
Fig. 7 is brushless dual-feed motor three level FUZZY ALGORITHMS FOR CONTROL block diagram of the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is specifically described
Fig. 1 is the two-way frequency conversion speed-adjusting system structured flowchart of high-power brushless double-fed machine three level designed by the present invention, and this system includes brushless dual-feed motor；Brushless dual-feed motor three-level pwm rectification unit: include control circuit Slab element, Hall element, rectifier terminal alternating voltage, current signal conditioning circuit unit, rectifier drive circuit unit；Brushless dual-feed motor three-level inverter unit: include converter main circuit unit, Hall element measure voltage & current unit, power winding alternating voltage, current signal conditioning circuit unit, control winding alternating voltage, current signal conditioning circuit unit, DC terminal voltage testing circuit unit, inverter driving circuit unit；
As it is shown in figure 1, the power winding of brushless dual-feed motor connects common frequency power network, control winding and connect Alternating Current Governor System；Three-level pwm rectification unit in Alternating Current Governor System connects common frequency power network and DC terminal electric capacity, it is unidirectional current by the AC rectification of common frequency power network, detection unit is connected common frequency power network by Hall element and gathers voltage and current information, signal after collection sends into the AD port of DSP in DSP control unit through the filtering of signal conditioning circuit, amplification, DSP calculates the pwm signal needed for rectification, pwm signal sends into drive circuit, and drive circuit controls the turn-on and turn-off of main circuit breaker in middle device according to pwm signal。To realize the switching process that AC rectification is direct current；
The AC current of common frequency power network after over commutation by the filter action of dc-link capacitance, send into three-level pwm inversion unit, inversion unit is respectively adopted Hall element and connects power winding terminal and control winding terminal, gather the voltage of power winding terminal, current signal, signal sends into signal conditioning circuit, amplify after filtering and send into DSP control unit AD port, dsp chip calculates the PWM ripple signal controlled needed for motor, pwm signal is sent into drive circuit, and drive circuit controls the turn-on and turn-off of main circuit switch device according to signal。To control motor。
Fig. 2 is inverter structure circuit diagram, and the structure that wherein inverter circuit is concrete is divided into the parts such as diode clamp type three-level inverter circuit, IGBT snubber circuit, charging current limiter circuit as shown in Figure 2。In main circuit, every phase brachium pontis has 4 power devices, and 2 clamp diodes are constituted。Different on-off actions is coordinated with clamp diode so that each brachium pontis exports 3 kinds of voltage outputs by power device。
Physical circuit principle and parameter designing are as follows:
Filter capacitor: owing to three-phase alternating current adopts first-harmonic to be 50Hz power frequency supply, if the voltage change range of input AC electricity is Vmin-Vmax, frequency fluctuation ranges for fmin-fmax, DC pulse after the employing three-phase alternating current rectified filtering of inputThen there is filter capacitor computing formula:
Wherein, Win=Pin/3fmin, in formula, Pin=Pout/ η, Pin、PoutWith η respectively inverter input power, output, system effectiveness。If f excursion is 47.5～52.5Hz, V fluctuation range is 323-437V。Numerical value substitutes into above formula, and to obtain C be 1754uF, consider that system power is bigger, for filtering for commutator better, galvanic current pressure is provided, keep derided capacitors neutral-point potential balance as far as possible, and two electric capacity are for being connected in series, take two derided capacitors C4, C11 respectively 3300uF, pressure can be selected for 450V。
Charging current limiter circuit design: in order to avoid excessive thus damaging rectifier tube in powered on moment filter capacitor charging current, adopts current-limiting resistance R1 to charge to electric capacity C4, C11。In conjunction with capacitance, charging interval, charging current design, taking current-limiting resistance R1 is 50, and power is 100W。When converter normal operation, owing to DC bus current is relatively big, resistance accesses for a long time and can produce pressure drop in DC loop, it is possible to can affect inverter output voltage amplitude, affect the foundation of motor-field, thus causing electromagnetic torque pulsation。Access catalyst KM1, when after electric capacity charging complete being after converter is started working by current-limiting resistance short circuit, it is to avoid the problems referred to above produce。
Inverter circuit designs: inverter circuit adopts NPC three-level inverter topology structure, adopts the mode of diode clamp to have 3 kinds of varying levels relative to the neutral point output voltage of DC partial voltage electric capacity。Below wherein each component parameters is designed, mainly includes clamp diode, IGBT switching device
The determination of clamp diode: set motor and adopt star-like connection, it is Rated motor electric current that inverter often exports electric current mutually。When output level is 0 level, no matter motor be in electric model or regeneration mode to flow separately through the average current of two clamp diodes be rated current, it is 10A, consider to leave certain allowance, select that to continue forward current be the clamp diode of 15A, the highest pressure half for DC bus-bar voltage and Udc/2。
RCD buffer circuit designs: in order to protect IGBT opening and eliminating peak voltage pulse shock when turning off better, designs based on discharge and recharge type RCD absorbing circuit, is particularly suitable for applying in large-power occasions。
Protection process analysis。Turn off process: when IGBT turns off, its both end voltage rises to pressure for Udc/2 off state from the conducting state that pressure drop is only small, for avoiding voltage increase rate, abatement peak voltage pulse, Cs, D1 series circuit being now connected in parallel on IGBT two ends charges to electric capacity Cs, reduce the overlap of raised voltage and drop-out current, thus reducing the turn-off power loss of IGBT。Opening process: when opening, both end voltage declines, circuit RsCs discharges to IGBT, and so advantageously allowing switching tube fast conducting current rise rate increases, and reduces switching tube ON time, thus reducing switching loss。
The determination of electric capacity Cs: determine charging capacitor Cs at turn off process, turning off energy is:
Can be released by above formula:
Wherein, IcMaximum collector current, VceFor colelctor electrode and emitter voltage, tr、tfRespectively the colelctor electrode maximum rise time, maximum fall time。
Resistance RSDetermination: the electric capacity C when IGBT opensSRequire over RC loop to discharge, for preventing from burning out switching tube, it is desirable to maximum discharge current and operating current sum should be less than the rated current of switching tube。If having discharged through 3 times of electric capacity electric discharge constants, all discharging as long as the discharge process time is determined to meet before next cycle switching tube turns off moment arriving, namely not affected the charging of next cycle electric capacity, it is possible to determine according to the switch periods time。Namely the selection meeting 3RsCs=ton, ton can be determined according to switching frequency, if switching frequency is 5kHz, taking buffer resistance is 10k Ω。
Fig. 3 is power device drive circuit figure, and the drive circuit of power device adopts the PC929 chip that SHARP company of Japan produces, and chip has high speed, built-in short-circuit protection circuit, the feature such as easy to use, is that one is than more typical drive circuit chip。Electric current is driven to be 0.4A to the maximum；There is high-speed response time；Isolation voltage is up to 4kV, it is adaptable to the driving of Small And Medium Capacity IGBT。Fig. 3 is based on the chip PC929 drive circuit built, the 1 of PC929,2 pins connect pwm pulse through resistance, 3 pins connect pulse voltage, and 10,14 pins connect the negative pole of power supply, and positive pole connects 13 pins, 12 pins are output stage feeder ear, general and 13 pins connect altogether, and 11 pins are outfan, drive switching tube through resistance R6, if power is excessive, it is possible to through resistance R6Connecing switching tube, 9 pins and peripheral circuit thereof after connecing amplifying circuit again and constitute protection circuit, when there being fault to occur, 8 pins meeting output low level signals, TLP521 internal illumination diode turns on, and produces high level signals at 3 pins, returns to main control chip。
Stabilivolt Z3 is by E point voltage clamper at 9V, and when inputting pwm pulse waveform and being low level, interior light emitting diodes turns on, and produces high level through optocoupler 11 pin, and the pressure drop with E point is 15V, through resistance R6Produce electric current, make switching tube turn on。When inputting pwm pulse waveform and being high level, Light-Emitting Diode ends, and produces the pressure drop of-9V between G, E, and switching tube ends。
Fig. 4 is alternating current testing circuit, Fig. 5 is ac voltage detection circuit, in order to meet control system to current detecting high speed and high-precision requirement, in system adopt be Lyme company produce Hall current sensor HBC10ES5 to detect stator current, current sensor HBC10ES5 is semicircle hollow, wire traverse from middle circular hole, can measure current signal when electric isolution, it is ensured that circuit safety。When there being electric current to pass through, its internal component can sense generation voltage signal automatically, by U0OUT pin output, HBC10ES5 is active device, must power before work, 1 pin V in deviceccFor its power supply, 2 pin ground connection, 3 pin direct voltage output signals.
Its running voltage is ± 15V, and frequency bandwidth is 0-100kHz。The stator phase currents obtained due to sensor is the AC signal having positive and negative values, so needing the signal of sensor gained through voltage increase, signal is adjusted between 0-3.3V to meet the input standard of the AD interface of DSP, it is sent to again in the AD conversion module of DSP, voltage detecting schematic diagram is as shown in Figure 5, current detection circuit schematic diagram as shown in Figure 4, motor control panel has the such current detecting passage of two-way, is respectively intended to detection motor A phase and C phase current。Fig. 5 voltage detecting principle is identical with alternating current Cleaning Principle, and voltage sensor adopts and is both the LV28-P Hall voltage sensor that Lyme company produces, and it measures scope 10～500V, and former limit rated current is 10mA。
As shown in Figure 5, UDCThrough resistance R1、R2It is divided to 0 and arrives 3.3V, U1AFor voltage follower, the voltage signal after conversion is through U1ARear raising carrying load ability。U1BFor charge amplifying circuit, voltage signal inputs the 2 of TIL300 after this circuit and draws, 1 pin ground connection, and Light-Emitting Diode turns on, and TIL300 exports coupled voltages signal, through U1CExport after low-pass filtering。
Fig. 6 is DC voltage testing circuit, and in main circuit, the stability of DC bus-bar voltage directly affects the performance of switching tube, it is therefore necessary to busbar voltage is collected in controller and is controlled by。Current signal is generally smaller, just can detect with Hall current sensor, and voltage signal is relatively larger, and high performance Hall voltage sensor involves great expense, impracticable。If the voltage signal of several hectovolts is input in controller after electric resistance partial pressure, Filtering Processing, if busbar voltage pulsation is relatively big, very easily controller is caused damage, have to power up in the middle of therefore air bound from。Using linear optical coupling TIL300 and LM324 to constitute voltage detecting circuit herein, its circuit diagram is as indicated with 6。
In main circuit, the stability of DC bus-bar voltage directly affects the performance of switching tube, it is therefore necessary to busbar voltage is collected in controller and is controlled by。Current signal is generally smaller, just can detect with Hall current sensor, and voltage signal is relatively larger, and high performance Hall voltage sensor involves great expense, impracticable。If the voltage signal of several hectovolts is input in controller after electric resistance partial pressure, Filtering Processing, if busbar voltage pulsation is relatively big, very easily controller is caused damage, have to power up in the middle of therefore air bound from。
Fig. 7 is brushless dual-feed motor three level FUZZY ALGORITHMS FOR CONTROL block diagram, electric current, voltage acquisition module, and flux observer and torque observer, voltage reconstruction unit, speed pi regulator and the module such as magnetic linkage Fuzzy Controller and torque Fuzzy Controller etc. form。Modular concept is similar with three level Direct Torque algorithms, adopts fuzzy control method to replace traditional stagnant ring comparative approach at magnetic linkage and torque adjustment link。In fuzzy control, eψAnd eTRespectively stator magnetic linkage error and electromagnetic torque error, namely Midpoint potential deviationIn formula:For stator magnetic linkage reference input；Input for torque reference。Square reference input；For the given meansigma methods of midpoint potential；VmFor midpoint potential measured value。By eψ, eT, emAnd stator magnetic linkage angular position thetaψAs the input of fuzzy controller, through obfuscation, rule-based reasoning, ambiguity solution, being output as inverter switching states signal, output is to NPC three-level inverter, and drive motor runs。
Claims (5)
1. the high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level, it is characterized in that this system is made up of the double; two PWM Alternating Current Governor System two large divisions of brushless dual-feed motor and three level, the double; two PWM Alternating Current Governor System of three level includes brushless dual-feed motor three-level pwm rectification unit and brushless dual-feed motor three-level inverter unit；
Described brushless dual-feed motor three-level pwm rectification unit: include control circuit Slab element, Hall element, rectifier terminal alternating voltage, current signal conditioning circuit unit, rectifier drive circuit unit；
Described brushless dual-feed motor three-level inverter unit: include converter main circuit unit, Hall element measure voltage & current unit, power winding alternating voltage, current signal conditioning circuit unit, control winding alternating voltage, current signal conditioning circuit unit, DC terminal voltage testing circuit unit, inverter driving circuit unit；
Wherein the power winding of brushless dual-feed motor connects common frequency power network, controls winding and connects Alternating Current Governor System；Three-level pwm rectification unit in Alternating Current Governor System connects common frequency power network and DC terminal electric capacity, it is unidirectional current by the AC rectification of common frequency power network, detection unit is connected common frequency power network by Hall element and gathers voltage and current information, signal after collection sends into the AD port of DSP in DSP control unit through the filtering of signal conditioning circuit, amplification, DSP calculates the pwm signal needed for rectification, pwm signal sends into drive circuit, drive circuit controls the turn-on and turn-off of main circuit breaker in middle device according to pwm signal, to realize the switching process that AC rectification is direct current；
The AC current of common frequency power network after over commutation by the filter action of dc-link capacitance, send into three-level pwm inversion unit, inversion unit is respectively adopted Hall element and connects power winding terminal and control winding terminal, gather the voltage of power winding terminal, current signal, signal sends into signal conditioning circuit, amplify after filtering and send into DSP control unit AD port, dsp chip calculates the PWM ripple signal controlled needed for motor, pwm signal is sent into drive circuit, drive circuit controls the turn-on and turn-off of main circuit switch device according to signal, to control motor。
2. the high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level according to claim 1, it is characterized in that the main circuit in the double, two PWM Alternating Current Governor System of three level is by three-level pwm rectification unit, DC terminal capacitor cell and three-level pwm inversion unit three part are constituted, rectifier terminal capacitor cell and three-level pwm inversion unit are respectively by main circuit unit, drive circuit unit, signal deteching circuit unit is constituted, the alternating current that common frequency power network is provided by main circuit is converted into unidirectional current by three-level pwm fairing and realizes filtering by electric capacity, being then passed through three-level pwm inverter bridge by unidirectional current rectification is frequency and the adjustable alternating current of voltage。
3. the high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level according to claim 1, it is characterized in that the stator winding end of brushless dual-feed motor is made up of power winding and control winding, power winding is powered by common frequency power network, controls winding and is powered by the inversion unit of Alternating Current Governor System。
4. the high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level according to claim 1, it is characterized in that the circuit of inversion unit is divided into diode clamp type three-level inverter circuit, IGBT snubber circuit, charging current limiter circuit part, in main circuit, every phase brachium pontis is made up of 4 power devices, 2 clamp diodes, different on-off actions is coordinated with clamp diode so that each brachium pontis exports 3 kinds of voltage outputs by power device。
5. the high-power brushless double-fed machine three two-way frequency conversion speed-adjusting system of level according to claim 1, it is characterized in that the drive circuit of power device adopts the PC929 chip that SHARP company of Japan produces, wherein the 1 of PC929, 2 pins connect pwm pulse through resistance, 3 pins connect pulse voltage, 10, 14 pins connect the negative pole of power supply, positive pole connects 13 pins, 12 pins are output stage feeder ear, general and 13 pins connect altogether, 11 pins are outfan, switching tube is driven through resistance R6, if power is excessive, switching tube can be connect again after resistance R6 connects amplifying circuit, 9 pins and peripheral circuit thereof constitute protection circuit, when there being fault to occur, 8 pins meeting output low level signals, TLP521 internal illumination diode turns on, high level signal is produced at 3 pins, return to main control chip。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410686806.0A CN105703689B (en) | 2014-11-25 | 2014-11-25 | The two-way frequency conversion speed-adjusting system of high-power brushless double-fed three level of machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410686806.0A CN105703689B (en) | 2014-11-25 | 2014-11-25 | The two-way frequency conversion speed-adjusting system of high-power brushless double-fed three level of machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105703689A true CN105703689A (en) | 2016-06-22 |
| CN105703689B CN105703689B (en) | 2019-07-02 |
Family
ID=56941746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410686806.0A Expired - Fee Related CN105703689B (en) | 2014-11-25 | 2014-11-25 | The two-way frequency conversion speed-adjusting system of high-power brushless double-fed three level of machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105703689B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787812A (en) * | 2017-02-23 | 2017-05-31 | 青岛天信电气有限公司 | A kind of mining permagnetic synchronous motor frequency converter |
| CN107070335A (en) * | 2016-12-30 | 2017-08-18 | 湖南大学 | Double PWM permanent magnetism power-driven system torque feed forward control methods and its control device |
| CN108988733A (en) * | 2017-05-31 | 2018-12-11 | 徐州安邦信汽车电机科技有限公司 | Vector-control frequency converter for motor |
| WO2019029176A1 (en) * | 2017-08-10 | 2019-02-14 | 深圳市道通智能航空技术有限公司 | Motor control circuit, motor system, electronic speed control and unmanned aerial vehicle |
| CN109818538A (en) * | 2017-11-21 | 2019-05-28 | 英飞凌科技奥地利有限公司 | For reducing the block commutation of the inverter losses of BLDC driver |
| CN112072969A (en) * | 2020-09-09 | 2020-12-11 | 北京金自天正智能控制股份有限公司 | Three-level double-PWM frequency converter driving synchronous motor rectification inversion coordination control method |
| CN112564466A (en) * | 2020-12-05 | 2021-03-26 | 青岛鼎信通讯股份有限公司 | IGBT turn-off spike suppression circuit of low-voltage static var generator |
| CN113708647A (en) * | 2021-08-30 | 2021-11-26 | 西安铁路职业技术学院 | Frequency conversion-power frequency combined driving system for large and medium-sized equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202586867U (en) * | 2011-12-20 | 2012-12-05 | 东北大学 | Brushless double-fed motor control device |
-
2014
- 2014-11-25 CN CN201410686806.0A patent/CN105703689B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202586867U (en) * | 2011-12-20 | 2012-12-05 | 东北大学 | Brushless double-fed motor control device |
Non-Patent Citations (1)
| Title |
|---|
| 刘岩: "一种改进式无刷双馈电机三电平直接转矩控制算法", 《东北大学学报（自然科学版）》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070335A (en) * | 2016-12-30 | 2017-08-18 | 湖南大学 | Double PWM permanent magnetism power-driven system torque feed forward control methods and its control device |
| CN107070335B (en) * | 2016-12-30 | 2019-05-24 | 湖南大学 | Double PWM permanent magnetism power-driven system torque feed forward control methods and its control device |
| CN106787812A (en) * | 2017-02-23 | 2017-05-31 | 青岛天信电气有限公司 | A kind of mining permagnetic synchronous motor frequency converter |
| CN108988733A (en) * | 2017-05-31 | 2018-12-11 | 徐州安邦信汽车电机科技有限公司 | Vector-control frequency converter for motor |
| WO2019029176A1 (en) * | 2017-08-10 | 2019-02-14 | 深圳市道通智能航空技术有限公司 | Motor control circuit, motor system, electronic speed control and unmanned aerial vehicle |
| CN109818538A (en) * | 2017-11-21 | 2019-05-28 | 英飞凌科技奥地利有限公司 | For reducing the block commutation of the inverter losses of BLDC driver |
| EP3493393A1 (en) * | 2017-11-21 | 2019-06-05 | Infineon Technologies Austria AG | Block commutation to reduce inverter losses for bldc drives |
| US10374533B2 (en) | 2017-11-21 | 2019-08-06 | Infineon Technologies Austria Ag | Block commutation to reduce inverter losses for BLDC drives |
| CN109818538B (en) * | 2017-11-21 | 2023-12-29 | 英飞凌科技奥地利有限公司 | Block commutation for reducing inverter losses in BLDC drives |
| CN112072969A (en) * | 2020-09-09 | 2020-12-11 | 北京金自天正智能控制股份有限公司 | Three-level double-PWM frequency converter driving synchronous motor rectification inversion coordination control method |
| CN112564466A (en) * | 2020-12-05 | 2021-03-26 | 青岛鼎信通讯股份有限公司 | IGBT turn-off spike suppression circuit of low-voltage static var generator |
| CN113708647A (en) * | 2021-08-30 | 2021-11-26 | 西安铁路职业技术学院 | Frequency conversion-power frequency combined driving system for large and medium-sized equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105703689B (en) | 2019-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105703689A (en) | High-power brushless doubly-fed machine three-level bidirectional variable-frequency speed regulation system | |
| CN101316074B (en) | Back-to-back three-power level midpoint clamping current transformer of wind power generation system | |
| CN101345423B (en) | 5-power level H-bridge cascade connection back-to-back current transformer used for wind power generation system | |
| CN100563086C (en) | Active bi-directional electric power adjuster | |
| TWI458235B (en) | Wind power generation system, and power circuit and converter structure thereof | |
| CN202841003U (en) | Novel three-phase photovoltaic grid-connected inverter system structure | |
| CN103280838A (en) | Wind power generation high-voltage direct current grid-connected system based on open coil structure and control method thereof | |
| CN102624016B (en) | Bidirectional energy flowing flow battery energy storage grid connection device and control method thereof | |
| CN102005772B (en) | Network combination inversion system and control method thereof | |
| CN104242345A (en) | High-power direct drive wind power converter circuit topological structure and application thereof | |
| CN102075107A (en) | Main circuit of three-phase four-wire DC/AC convertor and control method thereof | |
| CN108242816A (en) | A kind of Three-Phase Parallel multi-functional converter and its method of work | |
| CN110920422A (en) | High-power electric vehicle charging device based on current source and control method | |
| CN101599649B (en) | Directly-driven wind power generation system and mode for modulating SPWM inversion control signal in system | |
| CN202997986U (en) | Direct current brushless motor driving device | |
| CN1119850C (en) | Transformer equipment for increasing energy utilization rate of wind-driven electric generation | |
| CN104993712A (en) | Three-phase to single-phase AC converter control method | |
| CN106356889A (en) | Permanent magnet wind power generator set | |
| CN103582999A (en) | Apparatus for controlling rotor current in a wound-rotor type induction motor | |
| CN113251395A (en) | Steam generator's controlling means based on electromagnetic induction heating technique | |
| CN204334399U (en) | The operation control system of brushless ac compound rectifier excitation brshless DC motor | |
| CN104378034B (en) | The operation control system of brushless ac compound rectifier excitation brshless DC motor | |
| CN202841050U (en) | Cascaded high-voltage inverter speed regulating system with energy feedback function | |
| CN202004660U (en) | DC (Direct Current) over-voltage control system of rectification unit uncontrolled of high-voltage transducer | |
| CN110995017B (en) | High-voltage resonant network energy fluctuation control circuit and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190702 Termination date: 20191125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |