CN103253150B - Car permanent magnet synchronous motor control system inefficacy response control mehtod - Google Patents
Car permanent magnet synchronous motor control system inefficacy response control mehtod Download PDFInfo
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- CN103253150B CN103253150B CN201210571701.1A CN201210571701A CN103253150B CN 103253150 B CN103253150 B CN 103253150B CN 201210571701 A CN201210571701 A CN 201210571701A CN 103253150 B CN103253150 B CN 103253150B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a kind of car permanent magnet synchronous motor control system inefficacy response control mehtod; Comprise the following steps: step 1, detection motor speed and electric machine phase current; If step 2 motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling, losing efficacy appears in system, and six switching valves that controller controls three-phase permanent magnet synchronous motor are all opened; If step 3 motor speed is greater than the setting ratio TBD% of the maximum speed of revolution of coupling, losing efficacy appears in system, and six switching valves of motor controller controls three-phase permanent magnet synchronous motor all open n millisecond, controls lower three tube short circuits subsequently, goes up three pipes simultaneously and disconnect; If motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling after step 4, m second, six switching valves that controller controls three-phase permanent magnet synchronous motor are all opened.Protection controller internal components of the present invention can not affect the life-span due to the too high counter potential of motor, and motor can not produce too high instantaneous peak current simultaneously, prevents magnet steel from demagnetizing and occurs, affect motor performance.
Description
Technical field
The present invention relates to a kind of inefficacy response control mehtod of permagnetic synchronous motor, be particularly useful for super high power used in new energy vehicles permagnetic synchronous motor.
Background technology
When occurring when losing efficacy, power is no more than to the permagnetic synchronous motor of 60kW, common response method has the following two kinds:
1) motor controller controls switching valve enters flywheel pattern (Freewheeling), and namely six switching valves are all opened, and carries out afterflow by six diodes.
The advantage of this control method is: when entering flywheel pattern (Freewheeling), do not have very large instantaneous peak current to produce, magnetic steel of motor without demagnetization risk, thus when electric machine design, the magnet steel that HCJ is lower can be adopted, thus save cost.
But for the super high power automobile permanent magnet synchronous motor of >80kW, this method has the hidden danger of device secure context when motor height rotating speed.
Now, higher winding back emf can make motor charge to high-tension battery with certain power.High pressure main relay, in order to protect high-tension battery, will disconnect within some seconds.Subsequently, motor winding will, to DC-link capacitor charging, likely make its voltage transient promote, more than DC-link electric capacity the withstand voltage upper limit and cannot discharge rapidly, easily cause electric capacity to puncture, this is by damage electric machine controller or reduce its life-span, and then may bring hidden danger to the personal safety in car.If improve the voltage withstand class of DC-link, the corresponding cost that can increase electric machine controller.
2) motor controller controls switching valve directly enters ASC pattern, i.e. lower three tube short circuits, upper three pipe Disconnected modes.
The advantage of the method is: can not produce larger charge power and negative torque, and in electric machine controller, each device is without puncturing risk.
But for the super high power automobile permanent magnet synchronous motor of >80kW, this method may cause magnet steel to demagnetize, and makes motor performance reduce.
When pattern switches, will produce instantaneous peak current in motor winding and impact, especially for the super high power permagnetic synchronous motor of >80kW, instantaneous peak current likely exceedes kiloampere.If the HCJ of permanent magnetic steel is less, then magnet steel will demagnetize, and motor performance significantly declines; If prevent demagnetization, select larger intrinsic coercitive magnet steel, then the cost of magnet steel will significantly increase.Under this situation sharp risen in rare earth price, motor assembly originally significantly increases, and certainly will affect the price of hybrid vehicle and pure electric automobile, seriously hinders the universal of new-energy automobile.
Therefore, need a set of inefficacy response method of super high power designing permanent-magnet synchronous motor for >80kW, under making each operating mode, the damage of electric machine controller internal components can not be caused due to the counter potential that motor is too high; Due to too high instantaneous peak current, can not cause the demagnetization of motor internal magnet steel, motor performance declines simultaneously.
Due to the particularity of super high power automobile permanent magnet synchronous motor.No matter existing conventional inefficacy response method is flywheel pattern (Freewheeling), or ASC pattern all cannot carry out the protection of most actv. to whole system.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of car permanent magnet synchronous motor control system inefficacy response control mehtod; It can protect electric machine controller internal components can not affect the life-span due to the too high counter potential of motor, and motor can not produce too high instantaneous peak current simultaneously, prevents magnet steel from demagnetizing and occurs, affect motor performance.
In order to solve above technical matters, the invention provides a kind of car permanent magnet synchronous motor control system inefficacy response control mehtod; Comprise the following steps: step 1, detection motor speed and electric machine phase current; If step 2 motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling, losing efficacy appears in system, and such as detect that electric machine phase current exceedes threshold value, six switching valves of motor controller controls three-phase permanent magnet synchronous motor are all opened; If step 3 motor speed is greater than the setting ratio TBD% of the maximum speed of revolution of coupling, losing efficacy appears in system, and six switching valves of motor controller controls three-phase permanent magnet synchronous motor all open n millisecond, controls lower three tube short circuits subsequently, go up three pipes to disconnect simultaneously, and keep m second; Within this m second, the power-transfer clutch between motor and change speed gear box disconnects by entire car controller; Meanwhile, high-tension battery main relay is opened; If motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling after step 4, m second, six switching valves of motor controller controls three-phase permanent magnet synchronous motor are all opened; If motor speed is still greater than the setting ratio TBD% of the maximum speed of revolution of coupling, then repeat above-mentioned steps 3, until motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling, six switching valves of motor controller controls three-phase permanent magnet synchronous motor are all opened.
Beneficial effect of the present invention is: protection electric machine controller internal components can not affect the life-span due to the too high counter potential of motor, and motor can not produce too high instantaneous peak current simultaneously, prevents from magnet steel from demagnetizing to occur, and affects motor performance.
If in step 3, system disposition has initiatively brake auxiliary device, then now start this device, car load speed is reduced rapidly.
If in step 3, there is the hybrid architecture of driving engine and motor coaxle in vehicle, then by engine controller limiting engine rotating speed, car load speed is reduced rapidly.
In described step 2, TBD numerical value mates according to practical application; N millisecond in described step 3 mates according to practical application; In described step 2, electric machine phase current threshold value is mated according to practical application.
Described switching valve is insulated gate bipolar transistor IGBT.
When occurring in described step 2 to lose efficacy, breakdown signal enters electric machine controller and complex programmable logic device (CPLD) simultaneously, this breakdown signal of complex programmable logic device (CPLD) identification, and logical triggering fault interrupting.
Six of three-phase permanent magnet synchronous motor insulated gate bipolar transistor IGBTs are all opened by this interruption of electric machine controller identification in described step 2.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Accompanying drawing illustrates:
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is further detailed explanation:
Fig. 1 is inefficacy correlation method diagram of circuit described in the invention;
Fig. 2 is the control method schematic diagram that flywheel pattern (Freewheeling) switches to ASC pattern;
Fig. 3 controls be directly switch into ASC pattern and be introduced into the instantaneous current waveform schematic diagram that n millisecond flywheel pattern (Freewheeling) enters ASC again from PWM;
Fig. 4 is after m second, instantaneous current waveform when switching back flywheel pattern (Freewheeling) from ASC pattern and the change waveform schematic diagram of DC-link voltage.
Detailed description of the invention
The technical problem to be solved in the present invention is to provide the control method of a set of super high power used in new energy vehicles permagnetic synchronous motor when losing efficacy response; protection electric machine controller internal components can not affect the life-span due to the too high counter potential of motor; motor can not produce too high instantaneous peak current simultaneously; prevent from magnet steel from demagnetizing to occur, affect motor performance.
Inefficacy response method described in the invention; fully take into account inefficacy response method to demands such as the impact of each device such as DC-link electric capacity, high-tension battery, high-voltage relay in electric machine controller and occupant safeties; and combine the functions such as initiatively brake is auxiliary, governed engine speed; system is carried out to its fail-safe mode, in full range of speed, available protecting can be carried out to power drive system.Both due to the counter potential produced during motor high speed, the impact on device lifetimes such as high-tension battery, DC-link electric capacity can not be caused, also can not produce the instantaneous peak current exceeding kiloampere, cause magnet steel to demagnetize, motor performance is declined.
For super high power automobile permanent magnet synchronous motor; potential risk when its generation was lost efficacy is much larger than middle low power permagnetic synchronous motor; need to consider that inefficacy response method is on demands such as the impact of each device such as DC-link electric capacity, high-tension battery, high-voltage relay in electric machine controller and occupant safeties; and combine the functions such as initiatively brake is auxiliary, governed engine speed, system is carried out to its fail-safe mode.
Specific embodiment of the invention method is as follows:
The novel inefficacy response method flow process for super high power automobile permanent magnet synchronous motor that the present invention protects, as shown in Figure 1.Concrete steps are described as:
1. (the current rotating speed <TBD% maximum speed of revolution when motor operates in low, medium speed district, TBD numerical value can mate according to practical application) system appearance inefficacy, as detected, electric machine phase current exceedes threshold value, now electric machine controller enters flywheel pattern (Freewheeling), namely control six switching valves all to open, carry out afterflow by six diodes.
2. when motor operates in high rotating speed district, losing efficacy appears in (current rotating speed >TBD% maximum speed of revolution) system, responds as follows:
(1) first, electric machine controller enters n millisecond flywheel pattern (Freewheeling), switches to ASC pattern subsequently, namely controls lower three tube short circuits, go up three pipes disconnections simultaneously, and keeps this mode m second.
(2) within this m second, the power-transfer clutch (clutch) between motor and change speed gear box disconnects by entire car controller (VCU).Meanwhile, high-tension battery main relay (mainrelay) is opened.
(3) if Full Vehicle System is equipped with initiatively brake auxiliary device (Activebraking), then now start this function, car load speed is reduced rapidly.
(4) if car load is the hybrid architecture of driving engine and motor coaxle, by engine controller (ECU) limiting engine rotating speed, reach the synchronous object reducing motor speed, and then car load speed is reduced rapidly.
(5), after m second, if motor current rotating speed <TBD% maximum speed of revolution, electric machine controller enters flywheel pattern (Freewheeling) again.If motor speed is >TBD% maximum speed of revolution still, then counting m judges rotating speed after second again, if motor speed <TBD% maximum speed of revolution, electric machine controller enters flywheel pattern (Freewheeling) again.
If 3. there is the inefficacy that collision (Crash/emergency) causes; response method is now switch to ASC pattern after system carries out n millisecond flywheel pattern (Freewheeling) and keep; carry out rapid discharge; to prevent the insulation protection of impact wreckage motor, the counter potential that the motor of High Rotation Speed produces will cause passenger or rescuer's electric shock of coming.
Wherein:
In step 1, TBD, n, m tri-numerical value need to mate according to practical application, and during to ensure to enter flywheel pattern (Freewheeling) under this rotating speed, winding back emf is lower, can not charge to high-tension battery.
In step 2 (1), n millisecond flywheel pattern (Freewheeling) before ASC pattern can make phase current reduce to 0 rapidly, and effectively reduces the instantaneous peak current that ASC pattern subsequently produces, and prevents rotor magnetic steel from demagnetizing.Flywheel pattern (Freewheeling) switches to the control method schematic diagram of ASC pattern, as shown in Figure 2.Control be directly switch into ASC pattern and be introduced into the instantaneous current waveform that n millisecond flywheel pattern (Freewheeling) enters ASC again from PWMRun, as shown in Figure 3.
In step 2 (2), need the power-transfer clutch between motor and change speed gear box to disconnect.Utilize the rotor inertia that rotor is lower, and ASC pattern produces certain negative torque, make rotor be down to rapidly <TBD% maximum speed of revolution.High-tension battery main relay is opened simultaneously, the life-span can not be affected by the high-power charging of motor to protect high-tension battery.Meanwhile, high-voltage relay also can not affect its life-span owing to turning off when passing into big current.
In step 2 (5), because winding back emf reduces with rotating speed, can not puncture DC-link electric capacity, it is safe for therefore entering long-time flywheel pattern (Freewheeling), can not have an impact to DC-link or high-tension battery life-span.After m second, instantaneous current waveform when switching back flywheel pattern (Freewheeling) from ASC pattern and the change waveform of DC-link voltage, as shown in Figure 4.
The related software/hardware implementation procedure of new type of control method described in the invention is as follows:
1., when occurring to lose efficacy, entire car controller (VCU) sends fault (Failure) signal, enters electric machine controller and CPLD (CPLD) simultaneously.
2. this signal of complex programmable logic device (CPLD) identification, and logical triggering fault interrupting.
3. this interruption of electric machine controller identification, and judge current motor rotating speed n, if n<TBD% maximum speed of revolution, perform flywheel pattern (Freewheeling), six insulated gate bipolar transistor IGBTs are all opened.
4. if, motor current rotating speed >TBD% maximum speed of revolution, electric machine controller performs flywheel pattern (Freewheeling), after n millisecond counting, and pattern (Freewheeling) instruction of release flywheel.
4.1. this flywheel pattern (Freewheeling) instruction of complex programmable logic device (CPLD) identification, exits this state, by three tube short circuits under driving circuit, enters ASC pattern.
4.2. electric machine controller now sends request to entire car controller VCU, is opened by mainrelay, is disconnected by clutch simultaneously.
If 4.3. Full Vehicle System is equipped with Activebraking module, entire car controller VCU sends instruction, opens Activebraking function.
If 4.4. car load is the hybrid architecture of driving engine and motor coaxle, entire car controller VCU sends instruction by CAN to control unit of engine (ECU), limiting engine rotating speed.
4.5. electric machine controller is after m counts second, judges current rotating speed whether <TBD% maximum speed of revolution, if, release ASC instruction, exit this state, six insulated gate bipolar transistor IGBTs are all opened, reenter flywheel pattern (Freewheeling).
If 4.6. n still >TBD% maximum speed of revolution, then keep ASC pattern, and rejudge after counting m second, circulation is until motor current rotating speed <TBD% maximum speed of revolution, release ASC instruction, exit this state, six insulated gate bipolar transistor IGBTs are all opened, reenter flywheel pattern (Freewheeling).
If 5. electric machine controller receives the Failure signal of Crash/emergency, regardless of motor speed, electric machine controller all performs flywheel pattern (Freewheeling), after n millisecond counting, and pattern (Freewheeling) instruction of release flywheel.
5.1. this flywheel pattern (Freewheeling) instruction of complex programmable logic device (CPLD) identification, exits this state, by three tube short circuits under driving circuit, enters ASC pattern.
5.2. electric machine controller now sends request to entire car controller VCU, is opened by high-tension battery main relay main-relay, disconnects clutch simultaneously.
5.3. keep asc state ever since, no longer enter flywheel pattern (Freewheeling).
Wherein, because n millisecond flywheel pattern (Freewheeling) needs speed of response very fast, complex programmable logic device (CPLD) need be adopted to pass through to interrupt performing.M ASC second afterwards requires comparatively loose to time precision, can directly be performed by electric machine controller.
Inefficacy response method described in the invention, also can backward compatible middle and high power (as 30kW ~ 60kW) car permanent magnet synchronous motor control system.
Inefficacy response method described in the invention, also can according to the seriousness lost efficacy, in conjunction with parameters such as temperature of rotor, with existing direct flywheel pattern (Freewheeling) or directly enter ASC pattern and combine, design the inefficacy response method of distortion.
Be to be understood that, according to above-mentioned implementation method, the present invention can carry out other amendments that those skilled in the art can expect and distortion.The present invention is not limited to embodiment discussed above.Above the description of detailed description of the invention is intended to describe and the technical scheme that the present invention relates to being described.Based on the present invention enlightenment apparent conversion or substitute also should be considered to fall into protection scope of the present invention.Above detailed description of the invention is used for disclosing best implementation method of the present invention, can apply numerous embodiments of the present invention and multiple alternative to reach object of the present invention to make those of ordinary skill in the art.
Claims (7)
1. a car permanent magnet synchronous motor control system inefficacy response control mehtod; It is characterized in that, comprise the following steps:
Step 1, detection motor speed and electric machine phase current;
If step 2 motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling, losing efficacy appears in system, and as detected, electric machine phase current exceedes threshold value, and six switching valves of motor controller controls three-phase permanent magnet synchronous motor are all opened;
If step 3 motor speed is greater than the setting ratio TBD% of the maximum speed of revolution of coupling, losing efficacy appears in system, and six switching valves of motor controller controls three-phase permanent magnet synchronous motor all open n millisecond, controls lower three tube short circuits subsequently, go up three pipes to disconnect simultaneously, and keep m second;
Within this m second, the power-transfer clutch between motor and change speed gear box disconnects by entire car controller; Meanwhile, high-tension battery main relay is opened;
If motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling after step 4, m second, six switching valves of motor controller controls three-phase permanent magnet synchronous motor are all opened; If motor speed is still greater than the setting ratio TBD% of the maximum speed of revolution of coupling, then repeat above-mentioned steps 3, until motor speed is less than the setting ratio TBD% of the maximum speed of revolution of coupling, six switching valves of motor controller controls three-phase permanent magnet synchronous motor are all opened.
2. car permanent magnet synchronous motor control system inefficacy response control mehtod as claimed in claim 1, is characterized in that, if in step 3, system disposition has initiatively brake auxiliary device, then now start this device, car load speed is reduced rapidly.
3. car permanent magnet synchronous motor control system inefficacy response control mehtod as claimed in claim 1, it is characterized in that, if in step 3, there is the hybrid architecture of driving engine and motor coaxle in vehicle, then by engine controller limiting engine rotating speed.
4., as the car permanent magnet synchronous motor control system inefficacy response control mehtod in claim 1-3 as described in any one, it is characterized in that, in described step 2, TBD numerical value mates according to practical application; N millisecond in described step 3 mates according to practical application; In described step 2, the threshold value of electric machine phase current is mated according to practical application.
5. as the car permanent magnet synchronous motor control system inefficacy response control mehtod in claim 1-3 as described in any one, it is characterized in that, described switching valve is insulated gate bipolar transistor IGBT.
6. car permanent magnet synchronous motor control system inefficacy response control mehtod as claimed in claim 1, it is characterized in that, when occurring in described step 2 to lose efficacy, breakdown signal enters electric machine controller and complex programmable logic device (CPLD) simultaneously, this breakdown signal of complex programmable logic device (CPLD) identification, and logical triggering fault interrupting.
7. car permanent magnet synchronous motor control system inefficacy response control mehtod as claimed in claim 6, is characterized in that six of three-phase permanent magnet synchronous motor insulated gate bipolar transistor IGBTs are all opened by this interruption of electric machine controller identification in described step 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210571701.1A CN103253150B (en) | 2012-12-25 | 2012-12-25 | Car permanent magnet synchronous motor control system inefficacy response control mehtod |
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| CN201210571701.1A CN103253150B (en) | 2012-12-25 | 2012-12-25 | Car permanent magnet synchronous motor control system inefficacy response control mehtod |
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| CN103253150B true CN103253150B (en) | 2015-11-18 |
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| CN110098779A (en) * | 2014-11-14 | 2019-08-06 | 爱信艾达株式会社 | Control device for inverter |
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| US5119000A (en) * | 1991-02-25 | 1992-06-02 | Motorola, Inc. | Low noise motor drive circuit |
| CN101227163A (en) * | 2007-01-15 | 2008-07-23 | 深圳国际技术创新研究院 | Control system and control method of brushless DC motor |
| CN201656439U (en) * | 2010-04-06 | 2010-11-24 | 徐俊亚 | Generator failure protection circuit of regulator and voltage regulator thereof |
| CN102148517A (en) * | 2011-02-24 | 2011-08-10 | 珠海市洁源电器有限公司 | Miniature wind-solar hybrid power generation controller and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2484289B (en) * | 2010-10-04 | 2013-11-20 | Dyson Technology Ltd | Control of an electrical machine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119000A (en) * | 1991-02-25 | 1992-06-02 | Motorola, Inc. | Low noise motor drive circuit |
| CN101227163A (en) * | 2007-01-15 | 2008-07-23 | 深圳国际技术创新研究院 | Control system and control method of brushless DC motor |
| CN201656439U (en) * | 2010-04-06 | 2010-11-24 | 徐俊亚 | Generator failure protection circuit of regulator and voltage regulator thereof |
| CN102148517A (en) * | 2011-02-24 | 2011-08-10 | 珠海市洁源电器有限公司 | Miniature wind-solar hybrid power generation controller and control method |
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