CN110808705B - Multi-parameter input thermal protection method for hydrogen fuel cell automobile driving motor - Google Patents
Multi-parameter input thermal protection method for hydrogen fuel cell automobile driving motor Download PDFInfo
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- CN110808705B CN110808705B CN201911032811.9A CN201911032811A CN110808705B CN 110808705 B CN110808705 B CN 110808705B CN 201911032811 A CN201911032811 A CN 201911032811A CN 110808705 B CN110808705 B CN 110808705B
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0805—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for synchronous motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0856—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load characterised by the protection measure taken
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a multi-parameter input thermal protection method for a hydrogen fuel cell automobile driving motor. The multi-parameter input thermal protection method for the driving motor of the hydrogen fuel cell automobile, disclosed by the invention, comprises the steps of establishing a thermal model, monitoring a plurality of temperature variables and parameter information of the driving motor in real time, acquiring the highest temperature of the driving motor in real time through a corresponding software algorithm, and immediately implementing overheating protection by a control unit. According to the multi-parameter input thermal protection method for the driving motor of the hydrogen fuel cell automobile, disclosed by the invention, a thermal model is established, a plurality of real-time temperature variables and parameter information of a motor system can be obtained, the current highest temperature value of the driving motor is determined, necessary conditions are provided for accurately, immediately and effectively implementing an overheat protection function, any one or combination of the temperature variables and the parameter information of the driving motor reaches a set temperature limit value, namely, a safety protection strategy for starting motor output power derating or completely stopping output is started, and the reliability and the service life performance of the motor system are improved.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cell automobiles, in particular to a multi-parameter input thermal protection method for a driving motor of a hydrogen fuel cell automobile.
Background
At present, the technology of a motor system of a new energy automobile is still immature, and a plurality of defects exist in the aspects of some key technologies, particularly thermal design, overheat protection design and the like (for example, the motor system usually only monitors a single temperature variable: the motor temperature, in the design of the overheat protection function, the motor temperature is usually adopted as the input condition of overheat protection, but in the practical application, once the limit temperature is exceeded, the motor system, particularly a permanent magnet synchronous motor, can cause the damage of devices until the product fails, and the defects seriously affect the reliability and the service life performance of a driving motor, and the main problems are as follows:
1. lack of thermal design model of the system, the monitored temperature parameter of the motor system is single: usually, a thermistor is tightly attached to a radiator to obtain the real-time temperature of the radiator, and the temperature is used as the temperature of the controller and is also used as an input condition of an overheat protection function, but the parameter cannot sufficiently reflect the overall temperature of the controller, and the highest temperature in a future period cannot be predicted.
2. When the temperature of the driving motor can not be accurately and instantly obtained to reach the overtemperature alarm protection threshold value, the driving motor can already exceed the maximum temperature and be damaged or failed, so that the overheating protection function can not be effectively realized, the product is failed, and the reliability and the service life are low.
Disclosure of Invention
The invention aims to provide a multi-parameter input thermal protection method for a driving motor of a hydrogen fuel cell automobile, which can implement an overheat protection function in real time and effectively in order to overcome the defects in the prior art.
The multi-parameter input thermal protection method for the driving motor of the hydrogen fuel cell automobile, disclosed by the invention, comprises the steps of establishing a thermal model, monitoring a plurality of temperature variables and parameter information of the driving motor in real time, acquiring the highest temperature of the driving motor in real time through a corresponding software algorithm, and immediately implementing overheating protection by a control unit.
Preferably, the temperature variable includes junction temperature inside the power device, temperature of a freewheeling diode inside the power device, temperature of a bus capacitor, temperature of the PCB and temperature of the heat sink; the parameter information includes a phase current value, a phase current average value, a motor rotation speed parameter, and a value of a d-axis or q-axis current.
Preferably, the internal junction temperature of the power device and the temperature of the freewheeling diode are estimated by combining the characteristics of the power module of the driving motor with the current operating condition, wherein the current operating condition comprises a phase current value and a phase current average value.
Preferably, the temperature of the bus capacitor is obtained by the phase current value and the average value of the phase current and the current characteristic of the bus capacitor.
Preferably, the phase current average value is obtained by obtaining a plurality of phase current values through a three-phase current sensor of the motor, and then calculating the average value.
Preferably, the motor speed parameter is obtained by a motor position sensor.
Preferably, the value of the d-axis or q-axis current is obtained by obtaining a phase current value, inputting the phase current value into the motor control model and then transforming the phase current value.
Preferably, the overheating protection is implemented when any one of the temperature variable and the parameter information reaches or exceeds a maximum limit value.
Preferably, the implementation process of implementing the overheating protection is as follows:
s1: the control unit calculates the power and the torque required to be output at the current moment and the next moment;
s2: multiplying the power and torque obtained in S1 by a reduction factor β according to the limits on the temperature variables and parameter information;
s3: carrying out PID regulation of the PWM of the power module according to a value obtained by multiplying the reduction coefficient beta in the S2 by the power and the torque;
s4: the above-mentioned S1 to S2 are repeated until the temperature variable and the parameter information are not equal to or cannot reach the maximum limit value.
Preferably, the subtraction coefficient beta can be selected after calibration in the practical application process, wherein beta is more than or equal to 0 and less than or equal to 1.
According to the multi-parameter input thermal protection method for the driving motor of the hydrogen fuel cell automobile, disclosed by the invention, a thermal model is established, a plurality of real-time temperature variables and parameter information of a motor system can be obtained, the current highest temperature value of the driving motor is determined, necessary conditions are provided for accurately, immediately and effectively implementing an overheat protection function, any one or combination of the temperature variables and the parameter information of the driving motor reaches a set temperature limit value, namely, a safety protection strategy for starting motor output power derating or completely stopping output is started, and the reliability and the service life performance of the motor system are improved.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
The multi-parameter input thermal protection method for the driving motor of the hydrogen fuel cell automobile, disclosed by the invention, comprises the steps of establishing a thermal model, monitoring a plurality of temperature variables and parameter information of the driving motor in real time, acquiring the highest temperature of the driving motor in real time through a corresponding software algorithm, and immediately implementing overheating protection by a control unit.
According to the multi-parameter input thermal protection method for the driving motor of the hydrogen fuel cell automobile, disclosed by the invention, a thermal model is established, a plurality of real-time temperature variables and parameter information of a motor system can be obtained, the current highest temperature value of the driving motor is determined, necessary conditions are provided for accurately, immediately and effectively implementing an overheat protection function, any one or combination of the temperature variables and the parameter information of the driving motor reaches a set temperature limit value, namely, a safety protection strategy for starting motor output power derating or completely stopping output is started, and the reliability and the service life performance of the motor system are improved.
The temperature variable can comprise the internal junction temperature of the power device, the temperature of a freewheeling diode inside the power device, the temperature of a bus capacitor, the temperature of a PCB (printed circuit board) and the temperature of a radiator; the parameter information includes a phase current value, a phase current average value, a motor rotation speed parameter, and a value of a d-axis or q-axis current.
The temperature variation can be obtained as follows: and estimating the internal junction temperature of the power device and the temperature of the freewheeling diode by combining the characteristics of the power module of the driving motor with the current operating condition, wherein the current operating condition comprises a phase current value and a phase current average value. And obtaining the temperature of the bus capacitor through the phase current value, the phase current average value and the current characteristics of the bus capacitor. The temperature sensor attached to the surface of the PCB obtains the temperature of the PCB, and the temperature sensor arranged on the radiator obtains the temperature of the radiator.
The parameter information may be obtained as follows: the average value of the phase current can be obtained by obtaining the multiple phase current values through a three-phase current sensor of the motor and then calculating the average value. The motor speed parameter can be obtained by a motor position sensor. The value of the d-axis or q-axis current can be obtained by obtaining the phase current value and inputting the phase current value into the motor control model through transformation.
Over-temperature protection is implemented when any one of the temperature variable and the parameter information reaches or exceeds a maximum limit value. The process of implementing the overheat protection is as follows:
s1: the control unit calculates the power and the torque required to be output at the current moment and the next moment;
s2: multiplying the power and torque obtained in S1 by a reduction factor β according to the limits on the temperature variables and parameter information;
s3: carrying out PID regulation of the PWM of the power module according to a value obtained by multiplying the reduction coefficient beta in the S2 by the power and the torque;
s4: the above-mentioned S1 to S2 are repeated until the temperature variable and the parameter information are not equal to or cannot reach the maximum limit value.
The subtraction coefficient beta can be selected after calibration in the practical application process, wherein beta is more than or equal to 0 and less than or equal to 1.
When any one of the temperature variable and the parameter information reaches or exceeds the maximum limit value, the safety protection strategy of starting the motor to reduce the output power or completely stop the output provides necessary conditions for the motor to accurately, real-timely and effectively implement an overheat protection function so as to ensure that the controller can immediately and effectively implement protection control when the temperature reaches an overheat protection threshold value, thereby improving the reliability and the service life performance of the motor system.
The above is not relevant and is applicable to the prior art.
While certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing is illustrative only and is not limiting of the scope of the invention, as various modifications or additions may be made to the specific embodiments described and substituted in a similar manner by those skilled in the art without departing from the scope of the invention as defined in the appending claims. It should be understood by those skilled in the art that any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention are included in the scope of the present invention.
Claims (5)
1. A multi-parameter input thermal protection method for a hydrogen fuel cell automobile driving motor is characterized by comprising the following steps: establishing a thermal model, monitoring a plurality of temperature variables and parameter information of the driving motor in real time, acquiring the maximum temperature of the driving motor in real time through a corresponding software algorithm, and immediately implementing overheating protection by a control unit;
implementing overheating protection when any one of the temperature variable and the parameter information reaches or exceeds a maximum limit value;
the process of implementing the overheat protection is as follows:
s1: the control unit calculates the power and the torque required to be output at the current moment and the next moment;
s2: multiplying the power and torque obtained in S1 by a reduction factor β according to the limits on the temperature variables and parameter information;
s3: carrying out PID regulation of the PWM of the power module according to a value obtained by multiplying the reduction coefficient beta in the S2 by the power and the torque;
s4: repeating the steps S1-S2 until the temperature variable and the parameter information are not equal to or can not reach the maximum limit value;
the temperature variables comprise the internal junction temperature of the power device, the temperature of a freewheeling diode inside the power device, the temperature of a bus capacitor, the temperature of a PCB (printed Circuit Board) and the temperature of a radiator; the parameter information comprises a phase current value, a phase current average value, a motor rotating speed parameter and a value of d-axis or q-axis current;
estimating the internal junction temperature of the power device and the temperature of the freewheeling diode by combining the characteristics of a power module of the driving motor with the current operation condition, wherein the current operation condition comprises a phase current value and a phase current average value;
and obtaining the temperature of the bus capacitor through the phase current value, the phase current average value and the current characteristics of the bus capacitor.
2. The multi-parameter input thermal protection method for the hydrogen fuel cell automobile driving motor as claimed in claim 1, characterized in that: the phase current average value is obtained by obtaining a plurality of times of phase current values through a three-phase current sensor of the motor and then calculating the average value.
3. The multi-parameter input thermal protection method for the hydrogen fuel cell automobile driving motor as claimed in claim 2, characterized in that: and the motor rotating speed parameter is obtained through a motor position sensor.
4. The multi-parameter input thermal protection method for the hydrogen fuel cell automobile driving motor according to claim 3, characterized in that: the value of the d-axis or q-axis current is obtained by converting the obtained phase current value after being input into the motor control model.
5. The multi-parameter input thermal protection method for the hydrogen fuel cell automobile driving motor as claimed in claim 1, characterized in that: the subtraction coefficient beta can be selected after calibration in the practical application process, wherein beta is more than or equal to 0 and less than or equal to 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911032811.9A CN110808705B (en) | 2019-10-28 | 2019-10-28 | Multi-parameter input thermal protection method for hydrogen fuel cell automobile driving motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911032811.9A CN110808705B (en) | 2019-10-28 | 2019-10-28 | Multi-parameter input thermal protection method for hydrogen fuel cell automobile driving motor |
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| Publication Number | Publication Date |
|---|---|
| CN110808705A CN110808705A (en) | 2020-02-18 |
| CN110808705B true CN110808705B (en) | 2022-01-11 |
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| CN201911032811.9A Active CN110808705B (en) | 2019-10-28 | 2019-10-28 | Multi-parameter input thermal protection method for hydrogen fuel cell automobile driving motor |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107599890A (en) * | 2017-08-30 | 2018-01-19 | 北京新能源汽车股份有限公司 | A kind of temprature control method of driving motor for electric automobile, device and electric automobile |
| CN108667392A (en) * | 2017-03-29 | 2018-10-16 | 联合汽车电子有限公司 | Electric machine controller and its control method |
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2019
- 2019-10-28 CN CN201911032811.9A patent/CN110808705B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667392A (en) * | 2017-03-29 | 2018-10-16 | 联合汽车电子有限公司 | Electric machine controller and its control method |
| CN107599890A (en) * | 2017-08-30 | 2018-01-19 | 北京新能源汽车股份有限公司 | A kind of temprature control method of driving motor for electric automobile, device and electric automobile |
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| CN110808705A (en) | 2020-02-18 |
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Effective date of registration: 20210220 Address after: 046000 7th floor, block a, Yuecheng financial service center, No.36 zhuomaxi street, Changzhi City, Shanxi Province Applicant after: Zhongji hydrogen energy automobile (Changzhi) Co.,Ltd. Address before: Room 101, 1 / F, building 13, phase I, industrial incubation base, east of future third road and south of Keji fifth road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Applicant before: WUHAN LUOGEFU HYDROGEN ENERGY AUTOMOBILE Co.,Ltd. |
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