CN102700417A - Locked-rotor protection method for driving motor of electric vehicle - Google Patents
Locked-rotor protection method for driving motor of electric vehicle Download PDFInfo
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Abstract
The invention provides a locked-rotor protection method for a driving motor of an electric vehicle, which covers the full output range of a control torque of the driving motor. The method comprises the following steps of: dividing the control torque of the driving motor into N regions from 0 to the largest control torque according to a rotating speed signal of the driving motor and a control torque signal of a whole vehicle controller to the driving motor; setting a locked-rotor judging condition for each region and judging whether the driving motor enters into a locked-rotor state or not; if so, intervening the control torque of the driving motor by the whole vehicle controller, wherein an intervening quitting condition of the whole vehicle controller is that a rotating speed of the driving motor is more than a set rotating speed threshold value of a motor locked-rotor state. The locked-rotor protection method covers the condition that the locked-rotor may happen in the full output range of the control torque of the driving motor so as to ensure the driving motor not to be damaged by locked rotor.
Description
Technical field
The present invention relates to electric vehicle motor control technology field, specifically design a kind of driving motor of electric vehicle rotation-clogging protection method.
Background technology
The traditional combustion engine vehicle driving engine often occurs and suppresses flame-out phenomenon in actual use, mainly contains starting and the time does not in time unclamp parking brake, and power-transfer clutch does not step down timely during brake, the situation such as too early of brake pine during uphill starting.Electronlmobil the phenomenon that drive motor is suppressed can occur equally under above-mentioned situation, be commonly referred to as motor rotation blockage.Among the GB GB/T 18488.2-2006, the experimental technique of motor rotation blockage is described in detail.Power factor is low during motor rotation blockage, and locked rotor current raises rapidly, and the inverter temperature is fast rise also, the time slightly length will burn out drive motor and electric machine controller (MCU:Motor Control Unit).
Can know the definition of stall according to the GB standard; The stall moment of torsion generally is exactly the peak torque of motor; But in the electronlmobil use; Causing the moment of torsion of drive motor generation stall is not only peak torque, in its moment of torsion output area, all possibly cause drive motor generation stall on any point.Simultaneously, under the varying environment temperature, use, the temperature characteristic difference that drive motor generation stall is showed is very big.So, in Control of Electric Vehicles, should take different rotation-clogging protection measures according to different stall conditions, but also will consider the influence of ambient temperature, also must take into account the traveling comfort and the safety of car load simultaneously.
Summary of the invention
The objective of the invention is to propose a kind of rotation-clogging protection method that contains the full output area of drive motor control torque, fully included the situation of drive motor generation stall, avoid the drive motor stall to damage.
The driving motor of electric vehicle rotation-clogging protection method that proposes according to the present invention; Key is according to the tach signal of drive motor and the entire car controller control torque signal to drive motor; The control torque of drive motor is interval to being divided into N the maximum control moment of torsion from 0; Each interval is provided with the stall Rule of judgment, judges whether drive motor gets into the stall state, if; Then entire car controller is intervened the control torque of drive motor, and the intervention exit criteria of entire car controller is the motor rotation blockage state rotating speed threshold values of the rotating speed of drive motor greater than setting.
Driving motor of electric vehicle rotation-clogging protection method of the present invention; Be divided into a plurality of intervals through output area at whole drive motor control torque; Each interval is provided with corresponding stall Rule of judgment, and when the stall Rule of judgment was set up, entire car controller was intervened the control torque of drive motor immediately; Contain the situation that stall possibly take place in the full output area of protection drive motor control torque, guarantee that drive motor can not damage because of stall.
Further, the control torque of the corresponding different interval stall Rule of judgment of said entire car controller is intervened the frequency difference.Because different interval stall intensity are different in the electric machine control moment of torsion output area, the frequency of the mandatory control torque intervention of corresponding entire car controller also will be complementary.
Further, drive motor and inverter temperature are high more, and said entire car controller is big more to the intervention amplitude of the control torque of drive motor, and frequency is more little.Relative, under the low situation of drive motor and inverter temperature, entire car controller is wanted soon the intervention frequency of drive motor control torque, and the amplitude of reduction is less relatively.
Further, when drive motor and inverter temperature arrived the safety value of setting, entire car controller directly was reduced to 0 with the control torque of drive motor, and recovered after keeping Preset Time again.Can give drive motor and certain heat radiation time of inverter like this, the protection electronics package burns because of stall.
Further, after the judgement drive motor got into the stall state, entire car controller was opened the cooling system of car load.The heat that the stall that leaves so as much as possible produces, the components and parts in protection drive motor and the drive motor controller.
Further, after said judgement drive motor got into the stall state, entire car controller showed current car load stall status information through instrument, with the stall state of easily and effectively prompting chaufeur drive motor.
Further, the tach signal of said drive motor is provided by the drive motor position transduser.The car load speed that provides of recombination velocity sensor and the electrokinetic cell real-time power relevant information on the CAN bus just can calculate the drive motor control torque like this.
Description of drawings
Fig. 1 is the electric vehicle system structural representation.
Fig. 2 is that entire car controller is intervened scheme drawing to the drive motor control torque.
Fig. 3 is drive motor and inverter temperature are intervened process to control torque the scheme drawing that influences.
The specific embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify.
Like Fig. 1, VMS (entire car controller) 7 detects the demand of chaufeur acceleration pedal 3 and brake pedal 1, parses the request of chaufeur to driving or brake torque.VMS (entire car controller) 7 can parse the request of chaufeur gear according to the signal of gear detector 5; Can calculate car speed and drive motor rotating speed according to speed sensor 11 and drive motor position transduser 14 signals; Again according to receiving the relevant status information of electrokinetic cell 16 etc. on the CAN bus, calculate finally that car load drives or the request of brake torque.VMS (entire car controller) 7 is designated as the drive motor control torque with the request of car load driving torque; Send to MCU (drive motor controller) 9 through the CAN bus, the power of final car load request is realized by MCU (drive motor controller) 9 control inverters 15 and drive motor 13.Under car load moved ready situation, chaufeur unclamped parking brake 6, and gear detector 5 is placed forward position, bend the throttle 3, and the propulsive effort of drive motor 13 outputs is greater than the vehicle stiction, and vehicle just can be realized starting to walk forward.If in the above-mentioned situation, chaufeur parking brake 6 does not unclamp, bend the throttle 3; The propulsive effort of drive motor 13 outputs is less than the car load stiction, and vehicle can't be realized starting to walk forward, at this moment; Drive motor 13 rotating speeds are almost nil, are in the stall state, and 13 works of drive motor all will be converted into heat and exist and drive motor 13 and MCU (drive motor controller) 9 inside; Time length is long slightly, will burn its inner components and parts, so; When the stall state takes place drive motor 13, should in time take safety method, in order to avoid cause the vehicle electric components and parts to damage.
Driving motor of electric vehicle rotation-clogging protection method of the present invention; According to the tach signal of drive motor and entire car controller control torque signal to drive motor; The control torque of drive motor is interval to being divided into N the maximum control moment of torsion from 0; Each interval is provided with the stall Rule of judgment, judges whether drive motor gets into the stall state, if; Then entire car controller is intervened the control torque of drive motor, and the intervention exit criteria of entire car controller is the motor rotation blockage state rotating speed threshold values of the rotating speed of drive motor greater than setting.During application, the present invention is realized by entire car controller software.The program of setting in the entire car controller system real-time monitoring driving rotating speed of motor signal and entire car controller are to the control torque signal of drive motor, and when system judged that drive motor gets into the stall state, system can produce a stall state flag bit signal.Like Fig. 2, the first half is a stall state flag bit signal, and the latter half is the drive motor control torque.When the stall state flag bit was 1, corresponding entire car controller carried out mandatory intervention to the control torque of drive motor immediately.Because the interval stall intensity difference of difference in the electric machine control moment of torsion output area is so the control torque of corresponding different interval stall Rule of judgment is intervened the frequency difference.
As shown in Figure 3, the first half is drive motor and inverter temperature when low, the control torque after entire car controller is intervened the drive motor control torque; The latter half is drive motor and inverter temperature when high, the control torque after entire car controller is intervened the drive motor control torque.Comparison by Fig. 3 can know, under the low situation of drive motor and inverter temperature, entire car controller wants fast to the intervention frequency of drive motor control torque, and the amplitude of reduction is less relatively, just the drive motor control torque has been increased some sawtooth waves influences; Under the high situation of drive motor and inverter temperature, entire car controller is much bigger to the intervention amplitude of drive motor control torque.When drive motor and inverter temperature arrive the safety value of setting, just drive motor and inverter can bear safety temperature scope maxim the time, entire car controller directly is reduced to 0 with the control torque of drive motor, and keeps recovery again behind the Preset Time.Can give drive motor and certain heat radiation time of inverter like this, the protection electronics package burns because of stall.
After judging that drive motor gets into the stall state; Gone out the drive motor control torque intervened outside; After comprising that also the judgement drive motor gets into the stall state; Entire car controller is opened the cooling system of car load, with the heat that the stall that leaves as much as possible produces, the components and parts in protection drive motor and the drive motor controller; Show current car load stall status information through instrument simultaneously, with the stall state of easily and effectively prompting chaufeur drive motor.
Claims (7)
1. driving motor of electric vehicle rotation-clogging protection method; It is characterized in that according to the tach signal of drive motor and entire car controller control torque signal drive motor; The control torque of drive motor is interval to being divided into N the maximum control moment of torsion from 0; Each interval is provided with the stall Rule of judgment, judges whether drive motor gets into the stall state, if; Then entire car controller is intervened the control torque of drive motor, and the intervention exit criteria of entire car controller is the motor rotation blockage state rotating speed threshold values of the rotating speed of drive motor greater than setting.
2. driving motor of electric vehicle rotation-clogging protection method according to claim 1 is characterized in that the control torque intervention amplitude of the corresponding different interval stall Rule of judgment of said entire car controller is different with frequency.
3. driving motor of electric vehicle rotation-clogging protection method according to claim 2 is characterized in that drive motor and inverter temperature are high more, and said entire car controller is big more to the intervention amplitude of the control torque of drive motor, and frequency is more little.
4. driving motor of electric vehicle rotation-clogging protection method according to claim 3; It is characterized in that when drive motor and inverter temperature are brought up to the safety value of setting; Entire car controller directly is reduced to 0 with the control torque of drive motor, and recovers after keeping Preset Time again.
5. driving motor of electric vehicle rotation-clogging protection method according to claim 4, it is characterized in that judging that drive motor gets into the stall state after, entire car controller is opened the cooling system of car load.
6. driving motor of electric vehicle rotation-clogging protection method according to claim 4, it is characterized in that said judgement drive motor gets into the stall state after, entire car controller shows current car load stall status information through instrument.
7. driving motor of electric vehicle rotation-clogging protection method according to claim 4 is characterized in that the tach signal of said drive motor is provided by the drive motor position transduser.
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| CN201210158707.6A CN102700417B (en) | 2012-05-22 | 2012-05-22 | Locked-rotor protection method for driving motor of electric vehicle |
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| CN201210158707.6A CN102700417B (en) | 2012-05-22 | 2012-05-22 | Locked-rotor protection method for driving motor of electric vehicle |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085680A (en) * | 2012-12-18 | 2013-05-08 | 联合汽车电子有限公司 | Control method of new energy automobile in motor-stalling working condition |
| CN104986054A (en) * | 2015-06-17 | 2015-10-21 | 安徽江淮汽车股份有限公司 | Locked rotor frequency conversion control method and device for drive motors |
| CN107117076A (en) * | 2017-05-23 | 2017-09-01 | 合肥巨动力系统有限公司 | A kind of drive system of electric automobile rotation-clogging protection method based on threshold value |
| CN107306108A (en) * | 2016-04-21 | 2017-10-31 | 宝沃汽车（中国）有限公司 | Treating method and apparatus under motor rotation blockage state |
| CN108092596A (en) * | 2016-11-21 | 2018-05-29 | 德昌电机(深圳)有限公司 | Motor application equipment and its control method |
| CN109591602A (en) * | 2018-12-24 | 2019-04-09 | 浙江合众新能源汽车有限公司 | A kind of driving motor rotation-clogging protection system and method for electric car |
| CN110313129A (en) * | 2018-05-29 | 2019-10-08 | 深圳市大疆创新科技有限公司 | Holder and motor control method, device |
| CN111130428A (en) * | 2018-10-15 | 2020-05-08 | 株洲中车时代电气股份有限公司 | Locked rotor diagnosis and protection method of electric drive system |
| CN111907341A (en) * | 2020-07-31 | 2020-11-10 | 合肥巨一动力系统有限公司 | Locked-rotor protection system and method of motor drive controller for electric vehicle |
| CN112217444A (en) * | 2020-10-13 | 2021-01-12 | 东风汽车有限公司 | Electric automobile water pump control method, electronic equipment and storage medium |
| CN114312317A (en) * | 2020-09-30 | 2022-04-12 | 比亚迪股份有限公司 | Automobile motor locked-rotor protection method and device and automobile |
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| CN102350958A (en) * | 2011-06-30 | 2012-02-15 | 奇瑞汽车股份有限公司 | Motor locked-rotor protecting method of electric car electric driving system |
| CN102390285A (en) * | 2011-08-19 | 2012-03-28 | 奇瑞汽车股份有限公司 | Electrically-driven system locked-rotor protecting and torque-limiting method |
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2012
- 2012-05-22 CN CN201210158707.6A patent/CN102700417B/en active Active
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| JPH10201013A (en) * | 1997-01-10 | 1998-07-31 | Mitsubishi Motors Corp | Motor controller for electric vehicle |
| CN101462496A (en) * | 2007-12-19 | 2009-06-24 | 中国第一汽车集团公司 | Control method for preventing overheat of electric automobile drive motor |
| CN102350958A (en) * | 2011-06-30 | 2012-02-15 | 奇瑞汽车股份有限公司 | Motor locked-rotor protecting method of electric car electric driving system |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085680A (en) * | 2012-12-18 | 2013-05-08 | 联合汽车电子有限公司 | Control method of new energy automobile in motor-stalling working condition |
| CN103085680B (en) * | 2012-12-18 | 2015-11-18 | 联合汽车电子有限公司 | The control method of new-energy automobile under motor rotation blockage operating mode |
| CN104986054A (en) * | 2015-06-17 | 2015-10-21 | 安徽江淮汽车股份有限公司 | Locked rotor frequency conversion control method and device for drive motors |
| CN107306108A (en) * | 2016-04-21 | 2017-10-31 | 宝沃汽车（中国）有限公司 | Treating method and apparatus under motor rotation blockage state |
| CN107306108B (en) * | 2016-04-21 | 2020-03-24 | 宝沃汽车（中国）有限公司 | Method and device for processing motor in locked-rotor state |
| CN108092596A (en) * | 2016-11-21 | 2018-05-29 | 德昌电机(深圳)有限公司 | Motor application equipment and its control method |
| CN107117076A (en) * | 2017-05-23 | 2017-09-01 | 合肥巨动力系统有限公司 | A kind of drive system of electric automobile rotation-clogging protection method based on threshold value |
| CN107117076B (en) * | 2017-05-23 | 2019-08-23 | 合肥巨一动力系统有限公司 | A kind of drive system of electric automobile rotation-clogging protection method based on threshold value |
| CN110313129A (en) * | 2018-05-29 | 2019-10-08 | 深圳市大疆创新科技有限公司 | Holder and motor control method, device |
| CN111130428A (en) * | 2018-10-15 | 2020-05-08 | 株洲中车时代电气股份有限公司 | Locked rotor diagnosis and protection method of electric drive system |
| CN111130428B (en) * | 2018-10-15 | 2021-10-12 | 株洲中车时代电气股份有限公司 | Locked rotor diagnosis and protection method of electric drive system |
| CN109591602A (en) * | 2018-12-24 | 2019-04-09 | 浙江合众新能源汽车有限公司 | A kind of driving motor rotation-clogging protection system and method for electric car |
| CN111907341A (en) * | 2020-07-31 | 2020-11-10 | 合肥巨一动力系统有限公司 | Locked-rotor protection system and method of motor drive controller for electric vehicle |
| CN111907341B (en) * | 2020-07-31 | 2022-05-31 | 合肥巨一动力系统有限公司 | Locked-rotor protection system and method of motor drive controller for electric vehicle |
| CN114312317A (en) * | 2020-09-30 | 2022-04-12 | 比亚迪股份有限公司 | Automobile motor locked-rotor protection method and device and automobile |
| CN114312317B (en) * | 2020-09-30 | 2023-11-14 | 比亚迪股份有限公司 | Automobile motor locked rotor protection method and device and automobile |
| CN112217444A (en) * | 2020-10-13 | 2021-01-12 | 东风汽车有限公司 | Electric automobile water pump control method, electronic equipment and storage medium |
| CN112217444B (en) * | 2020-10-13 | 2022-07-08 | 东风汽车有限公司 | Electric automobile water pump control method, electronic equipment and storage medium |
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