CN202150822U - Four-quadrant frequency-converter main circuit used for constant-power wide range speed control of permanent magnet synchronous motor - Google Patents
Four-quadrant frequency-converter main circuit used for constant-power wide range speed control of permanent magnet synchronous motor Download PDFInfo
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- CN202150822U CN202150822U CN201120220899U CN201120220899U CN202150822U CN 202150822 U CN202150822 U CN 202150822U CN 201120220899 U CN201120220899 U CN 201120220899U CN 201120220899 U CN201120220899 U CN 201120220899U CN 202150822 U CN202150822 U CN 202150822U
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- synchronous motor
- rectifier
- main circuit
- control
- permagnetic synchronous
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Abstract
The utility model belongs to the field of motor control and power electronic technology and specifically relates to a four-quadrant frequency-converter main circuit used for constant-power wide range speed control of a permanent magnet synchronous motor. The four-quadrant frequency-converter main circuit includes a high frequency rectifier, an inverter group and an energy storing capacitor. Two end of the energy storing capacitor are connected to DC buses between the high frequency rectifier and the inverter group to store energy generated from an inductance component of the high frequency rectifier. The four-quadrant frequency-converter main circuit used for constant-power wide range speed control of the permanent magnet synchronous motor can enlarge the speed regulation range of a constant power zone of the permanent magnet synchronous motor effectively.
Description
Technical field
The utility model belongs to Motor Control and electric and electronic technical field, is specifically related to be used for the four-quadrant frequency converter main circuit of the permanent power wide range speed control control of permagnetic synchronous motor.
Background technology
Permagnetic synchronous motor is applied to every field more and more widely with its excellent characteristic (volume is little, operational efficiency is high, power factor high or the like); In many application scenarios (like machine tool chief axis drive system, driving device for electric vehicle or the like), require the Heng Gongshuaiqu of permagnetic synchronous motor more than rated speed that the speed adjustable range of broad is arranged.Interval in constant-power speed regulation; Because the winding back-emf of magneto is near the motor outer power voltage; So need to adopt the weak-magnetic speed-regulating control method, promptly, reduce the back-emf of motor windings through weakening the permagnetic synchronous motor air-gap field; External power source could effectively provide permagnetic synchronous motor electric current and power, realizes the above permanent power district's speed governing of rated speed of permagnetic synchronous motor.But permagnetic synchronous motor adopts permanent magnet excitation, and permanent magnet has very strong magnetomotive force, and is limited to motor gas-gap degaussing effect through the magnetic potential that the control armature supply produces, and therefore limited the speed adjustable range of permagnetic synchronous motor at Heng Gongshuaiqu.
Summary of the invention
The purpose of the utility model is exactly to propose a kind of four-quadrant frequency converter main circuit that is used for the permanent power wide range speed control control of permagnetic synchronous motor, and this circuit can effectively be expanded the speed adjustable range of permagnetic synchronous motor Heng Gongshuaiqu.
The utility model is following for the technical scheme that realizes above-mentioned utility model purpose: the four-quadrant frequency converter main circuit that is used for the permanent power wide range speed control control of permagnetic synchronous motor; Its difference is: it comprises hf rectifier, inverter group, storage capacitor; The parallelly connected module that all is serially connected with inductance element in each input circuit of hf rectifier and is made up of break-make power tube and diode, the two ends of storage capacitor are connected to and are used to store the energy from the inductance element generation of hf rectifier between the dc bus between hf rectifier and the inverter group.
The contrast prior art; The beneficial effect of the utility model is following: after the permagnetic synchronous motor rotating speed surpasses more than the rated speed; The control hf rectifier is operated in the BOOST operating mode of boosting; Make the DC bus-bar voltage of four-quadrant frequency converter rise and constantly rising the demand of back-emf when satisfying the permagnetic synchronous motor high-speed cruising with motor speed.When realizing that hf rectifier is operated in BOOST and boosts operating mode; Various combination power tube break-make repeatedly in the control hf rectifier; Magnetic field energy in each input circuit inductance element will make the electric capacity charging, thereby DC bus-bar voltage is constantly raise, and reach the goal-setting magnitude of voltage.
Description of drawings
Fig. 1 is the four-quadrant frequency converter main circuit topology of the utility model permagnetic synchronous motor;
Fig. 2 is the circuit theory diagrams that the utility model promotes DC bus-bar voltage;
Line voltage, current waveform figure when Fig. 3 a is the utility model lifting DC bus-bar voltage;
Line voltage, current waveform figure when Fig. 3 b is the utility model permagnetic synchronous motor damped condition.
Embodiment
Further specify the utility model embodiment below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model provides a kind of four-quadrant frequency converter main circuit topology that drives permagnetic synchronous motor, and the four-quadrant frequency converter main circuit topology is mainly become with inverter group II by the storage capacitor C on hf rectifier I, the dc bus among Fig. 1.According to the running status of permagnetic synchronous motor, hf rectifier both can be operated in the rectification operating mode, can be operated in active inversion operating mode (being energy feedback operating mode) again.When permagnetic synchronous motor was operated in motoring condition, the control hf rectifier was operated in the rectification operating mode, and electrical network provides the permagnetic synchronous motor active energy through hf rectifier and changes mechanical energy into and drives load movement; When permagnetic synchronous motor was operated in on-position, the control hf rectifier was operated in energy feedback operating mode, permagnetic synchronous motor was braked the electric energy loopback of mechanical energy transformation and was given electrical network, can improve the operational efficiency of whole system greatly.
After the permagnetic synchronous motor rotating speed surpasses more than the rated speed; The control hf rectifier is operated in the BOOST operating mode of boosting; Make the DC bus-bar voltage of four-quadrant frequency converter rise and constantly rising the demand of back-emf when satisfying the permagnetic synchronous motor high-speed cruising with motor speed.Realize that hf rectifier is operated in the boost principle of operating mode of BOOST and is, when the grid line voltage U
ABDuring＞0 interval, power tube T4, T3 in the control hf rectifier are operated in copped wave state (seeing shown in Fig. 2 a), R among Fig. 2 a
LoadIt is the equivalent load of simulation inverter and permagnetic synchronous motor power consumption.When control T4, the conducting of T3 closure, inductance L
A, L
BMiddle electric current increases, i.e. inductance L
A, L
BMagnetic field energy increase; Control T4, T3 end when breaking off, inductance L
A, L
BMiddle electric current reduces, i.e. inductance L
A, L
BIn magnetic field energy discharge, to capacitor C 1 charging, force capacitance voltage is that DC bus-bar voltage raises to the magnetic field energy of release (electric current in the inductance) through D1, D6.When the grid line voltage U
ABDuring＜0 interval, power tube T1, T6 in the control hf rectifier are operated in copped wave state (seeing shown in Fig. 2 b), when control T1, the conducting of T6 closure, and inductance L
A, L
BMiddle electric current increases, i.e. inductance L
A, L
BMagnetic field energy increase; Control T1, T6 end when breaking off, inductance L
A, L
BMiddle electric current reduces, i.e. inductance L
A, L
BIn magnetic field energy discharge, to capacitor C 1 charging, force capacitance voltage is that DC bus-bar voltage raises to the magnetic field energy of release (electric current in the inductance) through D4, D3.In other 4 intervals of grid line voltage, various combination power tube break-make repeatedly in the control hf rectifier just can make DC bus-bar voltage constantly raise, and reaches the goal-setting magnitude of voltage.
After the four-quadrant frequency converter DC bus-bar voltage reaches maximum permissible voltage; Further raising along with the permagnetic synchronous motor speed setting value; Through control inverter permagnetic synchronous motor d axle demagnetizing current is provided; Weaken the permagnetic synchronous motor air-gap field, make permagnetic synchronous motor can reach wideer speed adjustable range.
When permagnetic synchronous motor is operated in damped condition; Permagnetic synchronous motor can change mechanical energy into the AC energy of changeable frequency; The AC energy that permagnetic synchronous motor is changed through inverter changes direct current energy into and is stored in the capacitor C1 on the frequency changer direct current bus; Through hf rectifier the direct current energy that stores among the C1 is become identically with mains frequency again, electrical network is given in the AC energy loopback that phase place is consistent, reaches the purpose of energy-saving run.
The utility model adopts four-quadrant frequency converter main circuit topology (Fig. 1), and the utility model is used for a 20KW permagnetic synchronous motor four-quadrant frequency converter and is made up of main circuit and control circuit.Main circuit comprises parts such as hf rectifier I, storage capacitor C1 and inverter II, sees shown in Figure 1; The core of control circuit is digital signal processor (DSP).Power switch pipe T1-T12 among main circuit medium-high frequency rectifier I and the inverter II selects the IGBT module of 100A/1700V for use, when DC bus-bar voltage rises to 1200V, still can guarantee the safe operation of IGBT module.The four-quadrant frequency converter DC bus-bar voltage changes the A/D conversion inlet that the 0-3V direct voltage that has an electrical isolation with main circuit is delivered to transducer control circuit into through zero magnetic flux voltage transducer, as the value of feedback Uf of control DC bus-bar voltage.According to rotary speed setting value, DSP calculates permagnetic synchronous motor terminal voltage and DC bus-bar voltage set-point UG.As the UG that calculates during less than the grid line voltage peak, the output of control hf rectifier, can be controlled permagnetic synchronous motor and obtain better torque factor because DC bus-bar voltage is constant a little more than the Constant Direct Current busbar voltage of grid line voltage peak.After the UG that calculates was higher than the grid line voltage peak, the DC bus-bar voltage of control hf rectifier output was grown simultaneously with motor speed.In the present embodiment; Consider the permagnetic synchronous motor maximum voltage value that can bear and the power switch pipe magnitude of voltage of selecting for use of 380V electric pressure, control DC bus-bar voltage peak is 1100V, promptly greater than 2 times of 380V line voltage peak values; Under this supply power voltage; Permagnetic synchronous motor all can be exported rated power in the interval of 2 times of specified back-emfs, even therefore do not adopt weak magnetic control system technology, also can control the speed regulation by constant torque district that permagnetic synchronous motor obtains 2 times of rated speeds.After permagnetic synchronous motor reaches more than 2 times of rated speeds; Pass through vector control; Make permagnetic synchronous motor equivalence d shaft current greater than zero, realize the weak magnetic control system of permagnetic synchronous motor, can control permagnetic synchronous motor and reach the above constant-power speed regulation scope of 4 times of rated speeds.
Hf rectifier is operated in the BOOST operating mode of boosting and adopts the two closed-loop controls of voltage and current.Given rotating speed according to permagnetic synchronous motor; Calculate corresponding DC bus-bar voltage set-point; Regulate through voltage close loop and to improve DC bus-bar voltage to set-point, the voltage regulator output valve is exactly the given amplitude of electric current of current closed-loop, again the phase place of detection of grid voltage and through the coordinate transform realization power network current control strategy consistent with electric network voltage phase; Satisfying under the condition that DC bus-bar voltage equals set point, reaching the current control mode of minimum harmonic wave.Concrete, in the present embodiment, voltage, current double closed-loop control are adopted in the control of hf rectifier; At first poor according to DC bus-bar voltage set-point and Voltage Feedback value realized voltage close loop control, obtains the given amplitude of control power network current, again according to the line voltage synchronizing signal, calculates the instantaneous value of control three phase network electric current; Through coordinate transform, realize current closed-loop control at last to power network current.
Adopt the control method of the utility model; Not only can obtain wideer motor constant-power speed regulation scope; Can also make power network current be approximately sinusoidal wave, and change mechanical energy into the electric energy loopback to electrical network, reach the advantage of energy-saving run in the permagnetic synchronous motor braking.In this example; Permagnetic synchronous motor is operated in the voltage, current waveform of electronic operating mode shown in Fig. 3 a; Current waveform and line voltage same-phase, frequency converter is absorbed with power power, and permagnetic synchronous motor is operated in the voltage, current waveform of damped condition shown in Fig. 3 b; Current waveform and line voltage antiphase, frequency converter has been seen power power off.
Above content is the further explain that combines concrete execution mode that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection range of the utility model.
Claims (1)
1. the four-quadrant frequency converter main circuit that is used for the permanent power wide range speed control control of permagnetic synchronous motor; It is characterized in that: it comprises hf rectifier, inverter group, storage capacitor; The parallelly connected module that all is serially connected with inductance element in each input circuit of hf rectifier and is made up of break-make power tube and diode, the two ends of storage capacitor are connected to and are used to store the energy from the inductance element generation of hf rectifier between the dc bus between hf rectifier and the inverter group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220899U CN202150822U (en) | 2011-06-27 | 2011-06-27 | Four-quadrant frequency-converter main circuit used for constant-power wide range speed control of permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220899U CN202150822U (en) | 2011-06-27 | 2011-06-27 | Four-quadrant frequency-converter main circuit used for constant-power wide range speed control of permanent magnet synchronous motor |
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| CN202150822U true CN202150822U (en) | 2012-02-22 |
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| CN201120220899U Expired - Fee Related CN202150822U (en) | 2011-06-27 | 2011-06-27 | Four-quadrant frequency-converter main circuit used for constant-power wide range speed control of permanent magnet synchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545754A (en) * | 2012-02-29 | 2012-07-04 | 南京航空航天大学 | Winding open circuit type permanent magnet double-salient-pole starting power generation system |
| CN102710145A (en) * | 2012-06-19 | 2012-10-03 | 深圳市英威腾电气股份有限公司 | Large-power four-quadrant converter and electric power transformation device |
-
2011
- 2011-06-27 CN CN201120220899U patent/CN202150822U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545754A (en) * | 2012-02-29 | 2012-07-04 | 南京航空航天大学 | Winding open circuit type permanent magnet double-salient-pole starting power generation system |
| CN102545754B (en) * | 2012-02-29 | 2014-04-16 | 南京航空航天大学 | Winding open circuit type permanent magnet double-salient-pole starting power generation system |
| CN102710145A (en) * | 2012-06-19 | 2012-10-03 | 深圳市英威腾电气股份有限公司 | Large-power four-quadrant converter and electric power transformation device |
| CN102710145B (en) * | 2012-06-19 | 2016-02-03 | 深圳市英威腾电气股份有限公司 | A kind of high-power four-quadrant frequency converter and power-converting device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN DAYU ELECTRIC CO., LTD. Free format text: FORMER OWNER: DAYU ELECTRICAL TECHNOLOGY CO., LTD. Effective date: 20120726 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 430000 XIAOGAN, HUBEI PROVINCE TO: 430205 WUHAN, HUBEI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120726 Address after: 12, building 430205, building A3, Optics Valley finance port, 77 Optics Valley Avenue, East Lake hi tech Development Zone, Wuhan, Hubei Patentee after: Dayu Electrical Technology Co., Ltd. Address before: 12, building 430000, building A3, Optics Valley finance port, 77 Optics Valley Avenue, East Lake hi tech Development Zone, Xiaogan, Hubei Patentee before: Dayu Electric Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20190627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |