CN101462496A - Control method for preventing overheat of electric automobile drive motor - Google Patents
Control method for preventing overheat of electric automobile drive motor Download PDFInfo
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- CN101462496A CN101462496A CNA2007101935783A CN200710193578A CN101462496A CN 101462496 A CN101462496 A CN 101462496A CN A2007101935783 A CNA2007101935783 A CN A2007101935783A CN 200710193578 A CN200710193578 A CN 200710193578A CN 101462496 A CN101462496 A CN 101462496A
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- temperature
- electric automobile
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Abstract
The invention relates to a controlling method for preventing a driving motor of an electric automobile from overheating. The method is characterized in that a cooling liquid temperature signal WTM and motor rotating speed NM are used as input references; a safe torque value TMW of the maximum output is obtained through a 3D data table by taking a motor temperature not higher than 70 DEG C as a standard when the motor is at different speeds and temperatures; and in a control program, if a driver needs a torque which is more than the TMW, the torque output by commanding the motor finally is TMW. The method can control the torque when the driving motor overheats and protect the motor from not being damaged by overheating on the premise that the motor is guaranteed to have continuous torque output.
Description
Technical field
The present invention relates to a kind of control method that prevents overheat of electric automobile drive motor, belong to the hybrid vehicle control system.
Background technology
Adopt the automobile of hybrid power system that a common characteristic is arranged: to need combustion engine and electrical motor alternation, drive engine as car load.No matter combustion engine still be electrical motor when work, overheat protector is to deal with problems.For traditional internal-combustion engines vehicle, general using by possessing enough modes of the radiator of big heat-sinking capability, is cooled off refrigerant fluid with combustion engine; But for electrical motor, running hours, temperature generally can not surpass 70 ℃, and with respect to the actual environment for use of automobile, even if adopt the water cooled mode, also needing to adopt simultaneously suitable control method to guarantee still can trouble free service when motor overheating.This protection is essential especially when motor is worked with peak power.
Summary of the invention
The object of the present invention is to provide a kind of control method that prevents overheat of electric automobile drive motor; it is a kind of torque control method when drive motor is overheated; this method can guarantee that motor possesses under the prerequisite of continuous moment of torsion output, and the protection motor does not damage because of overheated.
Technical scheme of the present invention is achieved in that the control method that prevents overheat of electric automobile drive motor, N
M: rotating speed of motor is the numerical value of having distinguished;
T
M: the max. output torque of electrical motor is the inherent characteristic of electrical motor, and is relevant with rotating speed of motor;
T
MW: consider the influence of electric machine temperature rise, the max. output torque of electrical motor;
T
PM1: the target torque of the actual execution of electrical motor;
T
DSR: when not considering the motor overheating protection, the moment of torsion of wishing motor output;
WT
M: the temperature of motor refrigerant fluid is the numerical value of having distinguished.
It is characterized in that: cooling-liquid temperature signal WT
MWith motor speed N
MAs the input reference, being no more than 70 degrees centigrade with motor temperature is standard, obtains motor when different rotating speeds and the temperature by 3 dimension data tables, the safe torque value T of peak output
MWIn control program, if the chaufeur demand torque is greater than T
MW, so finally ordering the moment of torsion of motor output is T
MW
Good effect of the present invention is a kind of torque control method when drive motor is overheated, and this method can guarantee that motor possesses under the prerequisite of continuous moment of torsion output, and the protection motor does not damage because of overheated.
Description of drawings
Fig. 1 is a motor output torque characteristic curve of the present invention;
Fig. 2 is the characteristic curve of motor max. output torque of the present invention and cooling-liquid temperature and rotation speed relation;
Fig. 3 is the output torque MAP table of motor temperature characteristic of the present invention;
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing: as shown in Figure 1, 2, prevent the control method of overheat of electric automobile drive motor, the variable-definition that will be referred to is as follows:
N
M: rotating speed of motor is the numerical value of having distinguished;
T
M: the max. output torque of electrical motor is the inherent characteristic of electrical motor, and is relevant with rotating speed of motor;
T
MW: consider the influence of electric machine temperature rise, the max. output torque of electrical motor;
T
PM1: the target torque of the actual execution of electrical motor;
T
DSR: when not considering the motor overheating protection, the moment of torsion of wishing motor output;
WT
M: the temperature of motor refrigerant fluid is the numerical value of having distinguished.
The temperature rise of drive motor is depended on by motor output torque size; And output torque is the driving intention calculating of car-mounted computer according to chaufeur, is called chaufeur demand torque T
DSRIn order to protect motor in the course of the work, do not damage because of overheated, design one 3 dimension data table, introduce motor cooling-liquid temperature signal WT
M, cooling-liquid temperature signal WT
MWith motor speed N
MAs the input reference, according to motor characteristic, in real vehicle rating test process, by the actual temperature rise of monitoring motor, revise the data of this 3 dimension data table, being no more than 70 degrees centigrade with motor temperature is standard, obtain motor when different rotating speeds and temperature, the safe torque value T of peak output
MWIn control program, if the chaufeur demand torque is greater than T
MW, so finally ordering the moment of torsion of motor output is T
MWThereby: the purpose that reaches the protection drive motor.
As shown in Figure 3, in the output torque MAP of certain the motor temperature characteristic table, when at motor speed N
M=1000rpm, chaufeur demand torque T
DSRDuring=120Nm, if motor cooling-liquid temperature WT
MIn the time of=20 degrees centigrade, through computation of table lookup, the actual torque T that requires motor output of control system
PM1=120Nm, if but this moment motor cooling-liquid temperature WT
M=70 degrees centigrade, through computation of table lookup, the actual torque T that requires motor output of control system
PM1=75Nm.
In the output torque MAP of certain motor temperature characteristic table, as motor speed N
M=2000rpm, chaufeur demand torque T
DSRDuring=180Nm, if motor cooling-liquid temperature WT
MIn the time of=40 degrees centigrade, through computation of table lookup, the actual torque T that requires motor output of control system
PM1=180Nm, if but this moment motor cooling-liquid temperature WT
M=60 degrees centigrade, through computation of table lookup, the actual torque T that requires motor output of control system
PM1=142Nm.
Claims (1)
1, prevent the control method of overheat of electric automobile drive motor, the variable-definition that will be referred to is as follows:
N
M: rotating speed of motor is the numerical value of having distinguished; T
M: the max. output torque of electrical motor is the inherent characteristic of electrical motor, and is relevant with rotating speed of motor; T
MW: consider the influence of electric machine temperature rise, the max. output torque of electrical motor; T
PM1: the target torque of the actual execution of electrical motor; T
DSR: when not considering the motor overheating protection, the moment of torsion of wishing motor output; W
TM: the temperature of motor refrigerant fluid is the numerical value of having distinguished; It is characterized in that: cooling-liquid temperature signal W
TMWith motor speed N
MAs the input reference, being no more than 70 degrees centigrade with motor temperature is standard, obtains motor when different rotating speeds and the temperature by 3 dimension data tables, the safe torque value T of peak output
MWIn control program, if the chaufeur demand torque is greater than T
MW, so finally ordering the moment of torsion of motor output is T
MW
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101935783A CN101462496A (en) | 2007-12-19 | 2007-12-19 | Control method for preventing overheat of electric automobile drive motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101935783A CN101462496A (en) | 2007-12-19 | 2007-12-19 | Control method for preventing overheat of electric automobile drive motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101462496A true CN101462496A (en) | 2009-06-24 |
Family
ID=40803361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101935783A Pending CN101462496A (en) | 2007-12-19 | 2007-12-19 | Control method for preventing overheat of electric automobile drive motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101462496A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700417A (en) * | 2012-05-22 | 2012-10-03 | 奇瑞汽车股份有限公司 | Locked-rotor protection method for driving motor of electric vehicle |
| CN104713605A (en) * | 2013-12-16 | 2015-06-17 | 联合汽车电子有限公司 | Insufficient coolant flow fault diagnosis method for electric automobile cooling system |
| CN106707164A (en) * | 2017-01-03 | 2017-05-24 | 重庆长安汽车股份有限公司 | ISG motor temperature field experiment method and system |
| CN107315433A (en) * | 2017-06-23 | 2017-11-03 | 北京新能源汽车股份有限公司 | The method for acquiring temperature and device of motor |
| CN108099693A (en) * | 2017-11-29 | 2018-06-01 | 宁波吉利汽车研究开发有限公司 | motor torque control method, device and electric vehicle |
| CN108216461A (en) * | 2017-12-22 | 2018-06-29 | 深圳天轮科技有限公司 | Balancing bicycle motor method of controlling security and device |
| CN110739902A (en) * | 2018-07-20 | 2020-01-31 | 郑州宇通客车股份有限公司 | motor temperature sensor fault processing method and device |
| CN110949283A (en) * | 2019-10-12 | 2020-04-03 | 南京汽车集团有限公司 | Control method based on overload protection strategy of electric truck |
| CN113031673A (en) * | 2021-01-28 | 2021-06-25 | 浙江合众新能源汽车有限公司 | Temperature control method for pure electric vehicle driving system |
-
2007
- 2007-12-19 CN CNA2007101935783A patent/CN101462496A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700417A (en) * | 2012-05-22 | 2012-10-03 | 奇瑞汽车股份有限公司 | Locked-rotor protection method for driving motor of electric vehicle |
| CN102700417B (en) * | 2012-05-22 | 2014-12-10 | 奇瑞汽车股份有限公司 | Locked-rotor protection method for driving motor of electric vehicle |
| CN104713605A (en) * | 2013-12-16 | 2015-06-17 | 联合汽车电子有限公司 | Insufficient coolant flow fault diagnosis method for electric automobile cooling system |
| CN104713605B (en) * | 2013-12-16 | 2018-04-13 | 联合汽车电子有限公司 | Electric automobile cooling system coolant rate deficiency method for diagnosing faults |
| CN106707164A (en) * | 2017-01-03 | 2017-05-24 | 重庆长安汽车股份有限公司 | ISG motor temperature field experiment method and system |
| CN107315433A (en) * | 2017-06-23 | 2017-11-03 | 北京新能源汽车股份有限公司 | The method for acquiring temperature and device of motor |
| CN108099693A (en) * | 2017-11-29 | 2018-06-01 | 宁波吉利汽车研究开发有限公司 | motor torque control method, device and electric vehicle |
| CN108216461A (en) * | 2017-12-22 | 2018-06-29 | 深圳天轮科技有限公司 | Balancing bicycle motor method of controlling security and device |
| CN110739902A (en) * | 2018-07-20 | 2020-01-31 | 郑州宇通客车股份有限公司 | motor temperature sensor fault processing method and device |
| CN110739902B (en) * | 2018-07-20 | 2021-08-06 | 郑州宇通客车股份有限公司 | Motor temperature sensor fault processing method and device |
| CN110949283A (en) * | 2019-10-12 | 2020-04-03 | 南京汽车集团有限公司 | Control method based on overload protection strategy of electric truck |
| CN110949283B (en) * | 2019-10-12 | 2023-09-08 | 南京汽车集团有限公司 | Control method based on overload protection strategy of electric truck |
| CN113031673A (en) * | 2021-01-28 | 2021-06-25 | 浙江合众新能源汽车有限公司 | Temperature control method for pure electric vehicle driving system |
| CN113031673B (en) * | 2021-01-28 | 2022-04-12 | 浙江合众新能源汽车有限公司 | Temperature control method for pure electric vehicle driving system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: CHINESE AUTO GROUP CO NO.1 Effective date: 20120105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20120105 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Applicant after: China FAW Group Corporation Address before: 130011 Dongfeng Street, Jilin, Changchun, No. 2259 Applicant before: China FAW Group Corporation |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090624 |