CN105450107A - Bus capacitor discharge control method for automotive permanent magnet synchronous motor - Google Patents
Bus capacitor discharge control method for automotive permanent magnet synchronous motor Download PDFInfo
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- CN105450107A CN105450107A CN201511014205.6A CN201511014205A CN105450107A CN 105450107 A CN105450107 A CN 105450107A CN 201511014205 A CN201511014205 A CN 201511014205A CN 105450107 A CN105450107 A CN 105450107A
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- Prior art keywords
- bus capacitor
- voltage
- motor
- permanent magnet
- control method
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/24—Arrangements for stopping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a bus capacitor discharge control method for an automotive permanent magnet synchronous motor. The method comprises the steps as follows: a motor controller receives a discharge instruction and judges the state of a main contactor; after a motor rotor is fixed, the controller outputs a voltage vector to a three-phase stator of the motor according to a rest position angle of the rotor after detecting that the main contactor is cut off, so that a quadrature-axis current Iq of the stator of the motor is zero and a direct-axis current Id is greater than zero; the voltage of a bus capacitor is judged; after the condition that the voltage of the bus capacitor is lower than a threshold is detected, the discharge process is exited; an inverter and the motor generate controllable currents and do not generate an electromagnetic torque; electric charges stored in the bus capacitor are quickly consumed on a three-phase resistor of the motor; an extra part is not added; and bus capacitor discharging can be quickly finished.
Description
Technical field
the present invention relates to a kind of bus capacitor charging method of automobile permanent magnet synchronous motor, be specifically related to the bus capacitor discharge control method of the Permanent Magnet Synchronous Motor Controller of a kind of high pressure mixing power or pure electric vehicle.
Background technology
power drive system can be added or directly replace drive system completely with power drive system in new energy vehicle in drive system, to obtaining better discharge and oil consumption.General power drive system is made up of storage battery, motor and electric machine controller.Electric machine controller power section is made up of electronic power parts such as bus capacitor, three phase full bridge power model, absorbing circuits.Wherein the effect of bus capacitor is filtering, for level and smooth busbar voltage.When the rated voltage of power drive system is more than 60V, even if storage battery disconnects high tension loop, due to the energy storage characteristic of capacitor, there is high pressure risk to operation or maintenance personal in the voltage at capacitor two ends.Therefore after vehicle is shut down, system need rapidly by the tension discharge at capacitor two ends to being less than 60V.According to the laws and regulations requirement of GB18488, repid discharge needs to complete in 5s.
in addition, be different from commercial power drive system, new energy vehicle has strict volume and power density requirements to motor and electric machine controller.In order to meet this requirement, new energy vehicle motor normally permagnetic synchronous motor.The reverse electromotive force that permanent magnet produces in rotary course can be charged by the diode pair bus capacitor of three phase full bridge inside, therefore also may produce potential high pressure risk.
at present, bus capacitor common way of discharging is at the capacitor two ends parallel connection discharge loop that can disconnect.Discharge loop is made up of switch element and arresting element.Switch element disconnects when system works, when needs discharge, discharge loop is parallel to capacitor two ends.The energy that capacitor stores is changed into heat exhaustion on self body by arresting element in discharge process.Therefore high-power resistance or high-power positive temperature coefficient (PTC) resistance is usually needed.Because arresting element needs all energy of absorption capacitor, therefore the design of arresting element needs to consider the factors such as volume, heat radiation, power consumption.Therefore, often design cost is larger, and the discharge effect of capacitor cannot reach best.
Summary of the invention
for above-mentioned technical problem, the present invention proposes a kind of bus capacitor discharge control method of automobile permanent magnet synchronous motor, the method is by controlling the switch of power model, make inverter and motor produce controllable current, and can not electromagnetic torque be produced, the electric charge that bus capacitor stores is consumed fast on motor three-phase resistance, does not increase any additional parts, bus capacitor electric discharge can be completed fast.
technical scheme of the present invention is:
a bus capacitor discharge control method for automobile permanent magnet synchronous motor, is characterized in that, comprise the following steps:
s01: electric machine controller receives electric discharge instruction, judges the state of main contactor;
s02: after rotor is static, and controller detect main contactor disconnect after, according to the rest position angle setting of rotor, a voltage vector is exported to motor threephase stator, makes the stator quadrature axis current Iq=0 of motor, direct-axis current Id>0;
s03: the voltage judging bus capacitor, after detecting that the voltage of bus capacitor is lower than threshold value, exits discharge process.
preferably, described step S02 also comprises the rest position angle setting R calculating three-phase voltage value according to rotor, described voltage vector is that the controller of electric current loop exports direct-axis voltage Ud, quadrature-axis voltage Uq, carry out anti-Park conversion according to position angle R to convert with anti-Clark, obtain corresponding three-phase voltage value Ua, Ub, Uc;
Ua=sqrt（2/3）（Ud*cosR-Uq*sinR）；
Ub=sqrt（2/3）（Ud*cos(R-120°)-Uq*sin(R-120°)）；
Uc=sqrt（2/3）（Ud*cos(R+120°)-Uq*sin(R+120°)）。
preferably, control Ud<60V, and limit Id<10A.
preferably, detect the voltage of bus capacitor in real time, do not produce downward trend within a certain period of time when voltage or do not reach scheduled voltage, electric machine controller needs to exit electric discharge.
advantage of the present invention is:
1, the method is by controlling the switch of power model, makes inverter and motor produce controllable current, and can not produce electromagnetic torque, consumes fast on motor three-phase resistance by the electric charge that bus capacitor stores, safer, quick.
2, do not increase any additional parts, cost is low, convenient to be realized, and can complete bus capacitor electric discharge fast.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
fig. 1 is the circuit diagram of power drive system;
fig. 2 is the flow chart of the bus capacitor discharge control method of automobile permanent magnet synchronous motor of the present invention.
Embodiment
for making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment also with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
embodiment:
below in conjunction with accompanying drawing, preferred embodiment of the present invention is described further.
as shown in Figure 1, power drive system comprises Vehicular battery 1, main contactor 2, inverter 3, motor 4, control circuit 5, bus capacitor 6 and battery management system 7, and wherein inverter 3, control circuit 5 and bus capacitor 6 form electric machine controller 8.
bus capacitor discharge control method of the present invention, as shown in Figure 2.
s01: when electric machine controller detects electric discharge instruction or require electric discharge because of faults itself, by checking whether the condition adjudgement of main contactor activates discharging function.Only when main contactor disconnects, just allow activation discharging function.
s02: after rotor is static, and after controller detects major loop power-off, rest position angle setting R according to rotor calculates three-phase voltage value, target voltage vector is that the controller of electric current loop exports direct-axis voltage Ud, quadrature-axis voltage Uq, carry out anti-Park conversion according to position angle R to convert with anti-Clark, obtain corresponding three-phase voltage value Ua, Ub, Uc;
Ua=sqrt（2/3）（Ud*cosR-Uq*sinR）
Ub=sqrt（2/3）（Ud*cos(R-120°)-Uq*sin(R-120°)）
Uc=sqrt（2/3）（Ud*cos(R+120°)-Uq*sin(R+120°)）
also need to carry out SVPWM or SPWM in working control to control, the corresponding waveform of a, b, c three-phase voltage is not the sine wave of a standard, different controller possibility proportionality coefficient sqrt(2/3) also different.
a voltage vector is exported to motor threephase stator, makes the stator quadrature axis current Iq=0 of motor, direct-axis current Id>0; Now, the stator current vector of motor is consistent with rotor flux linkage vector direction, and both interactions can not produce electromagnetic torque.
s03: after detecting that busbar voltage is lower than threshold value, exit discharge process.
in step S02, for preventing the excessive inverter that causes of electric current from damaging, should control Ud size, Ud<60V, and Id electric current is limited, general Id<10A.
for failure and special situation, as battery management system issues state that main contactor disconnected and main contactor still closes physically.Now discharge loop is to storage battery continuous discharge, can accumulate a large amount of heat energy on discharge loop, damages discharge loop.Therefore in discharge process, need the voltage at real-time sensing capacitor two ends, judge whether discharge process works or discharge loop whether fault.Voltage when capacitor two ends does not produce downward trend or does not reach scheduled voltage in special time, and electric machine controller needs to exit discharge process.
the energy of bus capacitor major part can consume on motor three-phase resistance by the method, by the electric charge stored in bus capacitor release to evade the potential risk that high pressure brings.
should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (4)
1. a bus capacitor discharge control method for automobile permanent magnet synchronous motor, is characterized in that, comprise the following steps:
S01: electric machine controller receives electric discharge instruction, judges the state of main contactor;
S02: after rotor is static, and controller detect main contactor disconnect after, according to the rest position angle setting of rotor, a voltage vector is exported to motor threephase stator, makes the stator quadrature axis current Iq=0 of motor, direct-axis current Id>0;
S03: the voltage judging bus capacitor, after detecting that the voltage of bus capacitor is lower than threshold value, exits discharge process.
2. the bus capacitor discharge control method of automobile permanent magnet synchronous motor according to claim 1, it is characterized in that, described step S02 also comprises the rest position angle setting R calculating three-phase voltage value according to rotor, described voltage vector is that the controller of electric current loop exports direct-axis voltage Ud, quadrature-axis voltage Uq, carry out anti-Park conversion according to position angle R to convert with anti-Clark, obtain corresponding three-phase voltage value Ua, Ub, Uc;
Ua=sqrt（2/3）（Ud*cosR-Uq*sinR）；
Ub=sqrt（2/3）（Ud*cos(R-120°)-Uq*sin(R-120°)）；
Uc=sqrt（2/3）（Ud*cos(R+120°)-Uq*sin(R+120°)）。
3. the bus capacitor discharge control method of automobile permanent magnet synchronous motor according to claim 2, is characterized in that, control Ud<60V, and limits Id<10A.
4. the bus capacitor discharge control method of automobile permanent magnet synchronous motor according to claim 1, it is characterized in that, the voltage of real-time detection bus capacitor, do not produce downward trend within a certain period of time when voltage or do not reach scheduled voltage, electric machine controller needs to exit electric discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511014205.6A CN105450107A (en) | 2015-12-31 | 2015-12-31 | Bus capacitor discharge control method for automotive permanent magnet synchronous motor |
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| CN201511014205.6A CN105450107A (en) | 2015-12-31 | 2015-12-31 | Bus capacitor discharge control method for automotive permanent magnet synchronous motor |
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| CN105450107A true CN105450107A (en) | 2016-03-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515459A (en) * | 2016-12-15 | 2017-03-22 | 简式国际汽车设计（北京）有限公司 | Active discharging method of double-motor controller of battery electric vehicle |
| CN108123428A (en) * | 2016-11-29 | 2018-06-05 | 长城汽车股份有限公司 | Voltage drainage method, system and the vehicle of electric machine controller |
| CN108482160A (en) * | 2018-04-17 | 2018-09-04 | 浙江吉利控股集团有限公司 | A kind of repid discharge method, apparatus and system |
| CN109995306A (en) * | 2017-12-29 | 2019-07-09 | 郑州宇通客车股份有限公司 | A kind of electric machine controller discharge control method and device |
| CN111071048A (en) * | 2019-12-30 | 2020-04-28 | 智车优行科技（上海）有限公司 | Capacitor discharge method and device, electronic device and storage medium |
| CN111106744A (en) * | 2018-10-26 | 2020-05-05 | 上海汽车集团股份有限公司 | Active discharge method and device for inverter |
| CN111431156A (en) * | 2020-03-31 | 2020-07-17 | 无锡飞翎电子有限公司 | Bus capacitor discharge control method, control device, household electrical appliance and storage medium |
| CN112838751A (en) * | 2019-11-22 | 2021-05-25 | 比亚迪股份有限公司 | Active discharge circuit of motor controller and discharge control method thereof |
Citations (4)
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| JPH1014273A (en) * | 1996-06-24 | 1998-01-16 | Railway Technical Res Inst | Controller for permanent magnet synchronous motor for driving vehicle |
| CN101534084A (en) * | 2008-03-12 | 2009-09-16 | 通用汽车环球科技运作公司 | Redundant DC bus discharge for an electric motor system |
| CN102088187A (en) * | 2009-12-07 | 2011-06-08 | 通用汽车环球科技运作有限责任公司 | Systems and methods for discharging bus voltage using semiconductor devices |
| CN103738197A (en) * | 2013-12-12 | 2014-04-23 | 清华大学 | Discharging method of bus capacitor for electric automobile |
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2015
- 2015-12-31 CN CN201511014205.6A patent/CN105450107A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1014273A (en) * | 1996-06-24 | 1998-01-16 | Railway Technical Res Inst | Controller for permanent magnet synchronous motor for driving vehicle |
| CN101534084A (en) * | 2008-03-12 | 2009-09-16 | 通用汽车环球科技运作公司 | Redundant DC bus discharge for an electric motor system |
| CN102088187A (en) * | 2009-12-07 | 2011-06-08 | 通用汽车环球科技运作有限责任公司 | Systems and methods for discharging bus voltage using semiconductor devices |
| CN103738197A (en) * | 2013-12-12 | 2014-04-23 | 清华大学 | Discharging method of bus capacitor for electric automobile |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123428A (en) * | 2016-11-29 | 2018-06-05 | 长城汽车股份有限公司 | Voltage drainage method, system and the vehicle of electric machine controller |
| CN108123428B (en) * | 2016-11-29 | 2020-03-03 | 长城汽车股份有限公司 | Voltage discharge method and system of motor controller and vehicle |
| CN106515459A (en) * | 2016-12-15 | 2017-03-22 | 简式国际汽车设计（北京）有限公司 | Active discharging method of double-motor controller of battery electric vehicle |
| CN109995306A (en) * | 2017-12-29 | 2019-07-09 | 郑州宇通客车股份有限公司 | A kind of electric machine controller discharge control method and device |
| CN108482160A (en) * | 2018-04-17 | 2018-09-04 | 浙江吉利控股集团有限公司 | A kind of repid discharge method, apparatus and system |
| CN111106744A (en) * | 2018-10-26 | 2020-05-05 | 上海汽车集团股份有限公司 | Active discharge method and device for inverter |
| CN112838751A (en) * | 2019-11-22 | 2021-05-25 | 比亚迪股份有限公司 | Active discharge circuit of motor controller and discharge control method thereof |
| CN111071048A (en) * | 2019-12-30 | 2020-04-28 | 智车优行科技（上海）有限公司 | Capacitor discharge method and device, electronic device and storage medium |
| CN111431156A (en) * | 2020-03-31 | 2020-07-17 | 无锡飞翎电子有限公司 | Bus capacitor discharge control method, control device, household electrical appliance and storage medium |
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Application publication date: 20160330 |