CN110829948A - Locked-rotor protection method and device for motor system, vehicle and storage medium - Google Patents
Locked-rotor protection method and device for motor system, vehicle and storage medium Download PDFInfo
- Publication number
- CN110829948A CN110829948A CN201911016513.0A CN201911016513A CN110829948A CN 110829948 A CN110829948 A CN 110829948A CN 201911016513 A CN201911016513 A CN 201911016513A CN 110829948 A CN110829948 A CN 110829948A
- Authority
- CN
- China
- Prior art keywords
- motor system
- torque
- coefficient
- locked
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The embodiment of the invention discloses a locked rotor protection method and device of a motor system, a vehicle and a storage medium. Wherein, the method comprises the following steps: calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked-rotor torque coefficient of the motor system and a conversion relation between torque and current; and if the accumulated heat of the motor system exceeds the heat calibration upper limit, adjusting the running torque of the motor system by adopting a preset derating coefficient, wherein the accumulated heat of the motor system is caused by the current overload coefficient. According to the technical scheme provided by the embodiment of the invention, the running torque of the motor during the locked-rotor process is adjusted from the angle of heat generated by the motor system, so that the motor system is prevented from being out of order due to the locked-rotor process of the motor, and the safety and the reliability of the motor system are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle data processing, in particular to a locked-rotor protection method and device for a motor system, a vehicle and a storage medium.
Background
At present, along with the shortage of energy and the deterioration of the environment, the electric automobile is more and more paid attention by people, particularly a pure electric automobile, and the motor system is used as the only power source of the pure electric automobile, so that the reliability and the safety of the pure electric automobile are more important. The motor system includes a motor control unit, and as shown in fig. 1, the motor control unit controls a corresponding driving control unit and an Insulated Gate Bipolar Transistor (IGBT) module by generating a six-path Pulse Width Modulation (PWM) control signal to drive the motor system to operate. At this moment in the vehicle operation in-process, when meetting the barrier or climbing, the condition of stalling can appear in the motor system, and 6 IGBT can not change current again this moment, and two IGBT can open always under the same moment, and do not switch to other IGBT, if the stalling time overlength then can lead to the IGBT to overheat and burn out, integrated power module cost is higher this moment, has greatly increased motor system's maintenance cost.
In the prior art, the locked-rotor condition of a motor system is generally judged from different dimensions of signals such as the rotating speed, the torque and the like of the motor, and at the moment, if the judgment dimension of the locked-rotor condition is small, the judgment condition is incomplete, so that the locked-rotor misjudgment is easily caused; if the judgment dimensionality of the locked-rotor condition is large, the data volume needing to be calibrated is overlarge, and the development difficulty of the motor system is increased to a certain extent.
Disclosure of Invention
The embodiment of the invention provides a locked-rotor protection method and device for a motor system, a vehicle and a storage medium, which can adjust the running torque of the motor during locked-rotor from the perspective of heat generated by the motor system, avoid the motor system from being out of order due to locked-rotor of the motor, and improve the safety and reliability of the motor system.
In a first aspect, an embodiment of the present invention provides a blocking protection method for an electric machine system, where the method includes:
calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked-rotor torque coefficient of the motor system and a conversion relation between torque and current;
and if the accumulated heat of the motor system exceeds the heat calibration upper limit, adjusting the running torque of the motor system by adopting a preset derating coefficient, wherein the accumulated heat of the motor system is caused by the current overload coefficient.
In a second aspect, an embodiment of the present invention provides a locked-rotor protection device for a motor system, where the device includes:
the current overload coefficient calculation module is used for calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked rotor torque coefficient of the motor system and a conversion relation between torque and current;
and the running torque adjusting module is used for adjusting the running torque of the motor system by adopting a preset derating coefficient if the accumulated heat of the motor system exceeds the heat calibration upper limit, wherein the accumulated heat of the motor system is caused by the current overload coefficient.
In a third aspect, an embodiment of the present invention provides a vehicle including:
one or more processors;
storage means for storing one or more programs;
the motor system is used for controlling the vehicle to run;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the stalling protection method of the motor system according to any of the embodiments of the invention.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a locked rotor protection method for an electric machine system according to any embodiment of the present invention.
The embodiment of the invention provides a locked-rotor protection method, a device, equipment and a storage medium of a motor system, wherein the corresponding current overload coefficients of the motor system at different working moments are calculated according to the torque overload coefficient, the locked-rotor torque coefficient and the conversion relation between torque and current of the motor system, the accumulated heat caused by the current overload coefficients at different working moments exceeds the heat calibration upper limit, the running torque of the motor system is adjusted by adopting a preset derating coefficient, so that the motor system is protected by controlling the running of the motor system by adopting the reduced running torque when the motor is locked-rotor, the motor system dissipates heat, the running torque when the motor is locked-rotor is adjusted from the angle of the heat generated by the motor system, the motor system is prevented from being out of order due to the locked-rotor of the motor, and the safety and the reliability of the motor system are improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic diagram of the operation of a prior art motor system;
fig. 2 is a flowchart of a locked rotor protection method for a motor system according to an embodiment of the present invention;
fig. 3A is a flowchart of a locked rotor protection method for a motor system according to a second embodiment of the present invention;
fig. 3B is a schematic diagram of a motor system according to a second embodiment of the present invention, where the running torque is adjusted under a locked-rotor condition;
fig. 4 is a schematic structural diagram of a locked rotor protection device of a motor system according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 2 is a flowchart of a locked-rotor protection method for a motor system according to an embodiment of the present invention. The present embodiment is applicable to any vehicle having a motor system as a power source. The locked-rotor protection method for the motor system provided by the embodiment of the invention can be executed by the locked-rotor protection device for the motor system provided by the embodiment of the invention, and the device can be realized in a software and/or hardware manner and is integrated in a vehicle executing the method.
Specifically, referring to fig. 2, the method specifically includes the following steps:
and S210, calculating a corresponding current overload coefficient according to the torque overload coefficient and the locked-rotor torque coefficient of the motor system and the conversion relation between the torque and the current.
The motor system is a motor device which is configured in a vehicle and used as a power source of the motor device, and can be composed of a motor control unit, a drive control unit, an IGBT module, a motor and the like, and because the IGBT power tube in the motor system is burnt out due to overhigh heat when the motor system is blocked for too long time, the motor system is taken as a whole in the embodiment, and the motor system is protected mainly from the perspective of the heat generated by the motor system in the motor blocking process.
Meanwhile, the torque overload coefficient of the motor system represents the difference degree between the actual torque and the rated torque of the motor in the rotating process, and the locked-rotor torque coefficient represents the difference degree between the locked-rotor torque and the rated torque when the motor is locked.
Specifically, since the heat generated by the motor system during the motor stalling can be calculated by the corresponding current, in this embodiment, the corresponding torque variation situation in the motor system can be calculated according to the torque overload coefficient and the stalling torque coefficient of the motor system, and then the torque variation situation is correspondingly converted into the current variation according to the conversion relationship between the torque and the current, so as to obtain the corresponding current overload coefficient, so that the heat generated by the motor system caused by the correspondence can be calculated according to the current overload coefficient.
In this embodiment, before calculating the corresponding current overload coefficient, the torque overload coefficient and the locked-rotor torque coefficient of the motor system need to be calculated correspondingly, as follows:
1) and calculating a corresponding torque overload coefficient according to the actual torque and the rated torque of the motor system.
The calculation formula of the torque overload coefficient is as follows: n is T _ act/T _ rtd;
n is a torque overload coefficient, T _ act is the actual torque of the motor system, and T _ rtd is the rated torque of the motor system.
2) Determining a corresponding locked-rotor adjustment coefficient according to the rotating speed of the motor system; and calculating a corresponding locked rotor torque coefficient according to the locked rotor adjusting coefficient, and the locked rotor torque and the rated torque of the motor system.
The calculation formula of the locked-rotor torque coefficient is as follows: m is K T _ lck/T _ rtd;
m is a locked-rotor torque coefficient, K is a locked-rotor adjusting coefficient, and T _ lck is the locked-rotor torque of the motor system; at this time, the locked-rotor adjustment coefficient K is related to the rotation speed of the motor system, and the smaller the rotation speed is, the larger the locked-rotor adjustment coefficient is, in this embodiment, the corresponding locked-rotor adjustment coefficient may be found according to the current rotation speed of the motor system through the corresponding relationship between the rotation speed of the motor system and the locked-rotor adjustment coefficient set in the system simulation or the rack calibration in advance, and then the corresponding locked-rotor adjustment coefficient is calculated through the locked-rotor adjustment coefficient, the locked-rotor torque of the motor system, and the rated torque by using the above formula.
At this time, in this embodiment, calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked-rotor torque coefficient of the motor system and a conversion relationship between the torque and the current may specifically include: superposing the torque overload coefficient and the locked-rotor torque coefficient of the motor system to obtain a corresponding integrated torque overload coefficient; and converting the integrated torque overload coefficient according to the conversion relation between the torque and the current to obtain a corresponding current overload coefficient.
Specifically, because the torque overload coefficient and the locked-rotor torque coefficient of the motor system both belong to the change corresponding to the torque in the motor system, the torque overload coefficient and the locked-rotor torque coefficient of the motor system can be superimposed in a certain manner to integrate the torque change condition in the motor system to obtain a corresponding integrated torque overload coefficient, and then the integrated torque overload coefficient is correspondingly converted into the change condition of the current to obtain a corresponding current overload coefficient through the conversion relationship between the torque and the current, such as T ═ f (I), where T is the torque and I is the current; for example, after the above processes are unified, the current overload coefficient J may be obtained as g (M, N), where g is the inverse transformation of the transformation relationship between the torque and the current, and in this embodiment, the torque overload coefficient and the locked-rotor torque coefficient of the motor system may be directly substituted into the above calculation formula to calculate, so as to obtain the corresponding current overload coefficient.
And S220, if the accumulated heat of the motor system exceeds the heat calibration upper limit, adjusting the running torque of the motor system by adopting a preset derating coefficient.
Specifically, the accumulated heat of the motor system is caused by a current overload coefficient, and when the current of the motor system is too large, corresponding heat is generated. The upper limit of the heat calibration is the preset upper limit value which can be reached by the heat of the motor system, and if the accumulated heat generated by the motor system exceeds the upper limit value, a power tube in the motor system is burnt out due to overhigh temperature caused by continuous heat generation; the derating factor is an adjusting parameter for reducing the operating torque of the motor system to the rated torque or below the rated torque when the accumulated heat generated by the motor system is too high, and the heat generated by the motor system is slowly reduced when the operating torque of the motor system is below the rated torque or the rated torque.
It should be noted that, in this embodiment, for the motor systems arranged in different vehicles, the upper limit and the derating coefficient of the heat calibration corresponding to the vehicle calibration may be implemented.
In this embodiment, after the motor system normally works, the heat caused by the current at each moment is calculated in real time, it is set that if the motor system is not in the motor stalling state and the operating torque is lower than the rated torque, the heat caused by the current in the motor system can be ignored, after the motor system is in the motor stalling state or the operating torque is higher than the rated torque, the current in the motor system gradually accumulates to generate corresponding heat, and the heat generated by the motor system cannot be dissipated because the torque command issued by the driver to the motor system in the motor stalling state is too large, so that the corresponding power tube is burned out due to too high temperature in the motor system, therefore, the heat generated by the motor system at each moment is calculated in this embodiment, and then the accumulated heat at the current moment is obtained, if the accumulated heat of the motor system exceeds the corresponding heat calibration upper limit, the running torque of the motor system is adjusted by adopting a preset derating coefficient, namely, the torque instruction of the whole vehicle is reduced to be below the rated torque or the rated torque through the derating coefficient, and the subsequent motor system works by adopting the adjusted running torque, so that the heat of the motor system is slowly reduced, the temperature of the motor system caused by the heat is reduced, a power tube in the motor system is prevented from being burnt out, and the normal running of the motor system is ensured.
According to the technical scheme provided by the embodiment, the corresponding current overload coefficients of the motor system at different working moments are calculated according to the torque overload coefficient and the locked-rotor torque coefficient of the motor system and the conversion relation between the torque and the current, the running torque of the motor system is adjusted by adopting the preset derating coefficient when the accumulated heat caused by the current overload coefficients at different working moments exceeds the heat calibration upper limit, so that the reduced running torque is adopted to control the running of the motor system to protect the motor system when the motor is locked-rotor, the motor system is enabled to dissipate heat, the running torque when the motor is locked-rotor is adjusted from the angle of the heat generated by the motor system, the motor system is prevented from being out of order due to the locked-rotor of the motor, and the safety and the reliability of the motor system are improved.
Example two
Fig. 3A is a flowchart of a locked rotor protection method for a motor system according to a second embodiment of the present invention. The embodiment of the invention is optimized on the basis of the embodiment. Alternatively, the present embodiment mainly explains the specific process of adjusting the operating torque of the motor system in detail.
Specifically, referring to fig. 3A, the method of this embodiment may specifically include:
and S310, calculating a corresponding torque overload coefficient according to the actual torque and the rated torque of the motor system.
S320, determining a corresponding locked rotor adjustment coefficient according to the rotating speed of the motor system; and calculating a corresponding locked rotor torque coefficient according to the locked rotor adjusting coefficient, and the locked rotor torque and the rated torque of the motor system.
And S330, superposing the torque overload coefficient and the locked-rotor torque coefficient of the motor system to obtain a corresponding integrated torque overload coefficient.
And S340, converting the integrated torque overload coefficient according to the conversion relation between the torque and the current to obtain a corresponding current overload coefficient.
And S350, if the length of time that the motor system is in the locked-rotor working condition reaches the preset locked-rotor length, controlling the motor system to enter a derating protection stage until the accumulated heat of the motor system is dissipated to be lower than the preset heat, and controlling the motor system to enter a derating removing stage.
Optionally, in order to perform detailed division on the working state of the motor system and the corresponding locked-rotor condition, this embodiment may detect whether the motor system enters the locked-rotor state in real time, as shown in fig. 3B, when it is detected that the motor system is in the locked-rotor state of the motor, it is described that the motor system enters the locked-rotor state of the motor, at this time, it starts to detect the duration of the locked-rotor state of the motor system, after the duration of the locked-rotor state of the motor system reaches a preset locked-rotor duration, the motor system is controlled to enter a derating protection stage, in the derating protection stage, if the accumulated heat of the motor system exceeds the upper limit of the heat calibration, the running torque of the motor system is reduced by using a preset derating coefficient, so that the heat of the motor system slowly decreases until the accumulated heat of the motor system is dissipated below the preset heat, and it is ensured that a power, and controlling the motor system to enter a derating removing stage, wherein the operating power of the motor system cannot be adjusted in the derating removing stage.
And S360, in the derating protection stage, if the accumulated heat of the motor system exceeds the heat calibration upper limit and the running torque of the motor system exceeds the rated torque, adjusting the running torque of the motor system according to a preset derating coefficient, and controlling the motor system to work by adopting the adjusted running torque so as to enable the motor system to dissipate heat.
For example, as shown in fig. 3B, in the derating protection phase, if the accumulated heat of the motor system exceeds the upper limit of the heat calibration, the running torque may be reduced by the derating coefficient to dissipate heat, and if the accumulated heat is not dissipated below the preset heat and the torque command of the motor system still exceeds the rated torque, in order to not generate new heat, the embodiment may reduce the running torque of the motor system by using the preset derating coefficient, and control the motor system to operate by using the reduced running torque, so that the motor system continuously dissipates heat; and when the torque instruction of the motor system does not exceed the rated torque, the running torque can not generate new heat, so that in the derating protection stage, if the torque instruction of the motor system does not exceed the rated torque, no adjustment is made on the running torque, and the running torque is directly adopted to control the motor system to work.
And S370, in the derating removing stage, controlling the motor system to work by adopting a torque command of the motor system.
For example, as shown in fig. 3B, in the derating removing stage, since the accumulated heat of the motor system is reduced to below the preset heat, the normal operation of the motor system is not affected, and therefore, the torque command of the motor system does not need to be adjusted, and the torque command of the motor system can be directly used to control the operation of the motor system.
According to the technical scheme provided by the embodiment, the corresponding current overload coefficients of the motor system at different working moments are calculated according to the torque overload coefficient and the locked-rotor torque coefficient of the motor system and the conversion relation between the torque and the current, the running torque of the motor system is adjusted by adopting the preset derating coefficient when the accumulated heat caused by the current overload coefficients at different working moments exceeds the heat calibration upper limit, so that the reduced running torque is adopted to control the running of the motor system to protect the motor system when the motor is locked-rotor, the motor system is enabled to dissipate heat, the running torque when the motor is locked-rotor is adjusted from the angle of the heat generated by the motor system, the motor system is prevented from being out of order due to the locked-rotor of the motor, and the safety and the reliability of the motor system are improved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a locked-rotor protection device of a motor system according to a third embodiment of the present invention, and as shown in fig. 4, the locked-rotor protection device may include:
the current overload coefficient calculation module 410 is configured to calculate a corresponding current overload coefficient according to a torque overload coefficient and a locked-rotor torque coefficient of the motor system and a conversion relationship between a torque and a current;
and the running torque adjusting module 420 is configured to adjust the running torque of the motor system by using a preset derating coefficient if the accumulated heat of the motor system exceeds the heat calibration upper limit, where the accumulated heat of the motor system is caused by a current overload coefficient.
According to the technical scheme provided by the embodiment, the corresponding current overload coefficients of the motor system at different working moments are calculated according to the torque overload coefficient and the locked-rotor torque coefficient of the motor system and the conversion relation between the torque and the current, the running torque of the motor system is adjusted by adopting the preset derating coefficient when the accumulated heat caused by the current overload coefficients at different working moments exceeds the heat calibration upper limit, so that the reduced running torque is adopted to control the running of the motor system to protect the motor system when the motor is locked-rotor, the motor system is enabled to dissipate heat, the running torque when the motor is locked-rotor is adjusted from the angle of the heat generated by the motor system, the motor system is prevented from being out of order due to the locked-rotor of the motor, and the safety and the reliability of the motor system are improved.
Further, the locked rotor protection device of the motor system may further include:
and the working state control module is used for controlling the motor system to enter a derating protection stage if the length of the motor system under the locked-rotor working condition reaches the preset locked-rotor length, and controlling the motor system to enter a derating removing stage until the accumulated heat of the motor system is dissipated to be below the preset heat.
Further, the running torque adjusting module 420 may be specifically configured to:
in the derating protection stage, if the accumulated heat of the motor system exceeds the heat calibration upper limit and the running torque of the motor system exceeds the rated torque, the running torque of the motor system is adjusted according to a preset derating coefficient, and the adjusted running torque is adopted to control the motor system to work so as to enable the motor system to dissipate heat.
Further, the locked rotor protection device of the motor system may further include:
and the motor system control module is used for controlling the motor system to work by adopting a torque instruction of the motor system in the derating removing stage.
Further, the current overload coefficient calculating module 410 may be specifically configured to:
superposing the torque overload coefficient and the locked-rotor torque coefficient of the motor system to obtain a corresponding integrated torque overload coefficient;
and converting the integrated torque overload coefficient according to the conversion relation between the torque and the current to obtain a corresponding current overload coefficient.
Further, the locked rotor protection device of the motor system may further include:
and the torque overload calculation module is used for calculating a corresponding torque overload coefficient according to the actual torque and the rated torque of the motor system.
Further, the locked rotor protection device of the motor system may further include:
the locked rotor coefficient calculation module is used for determining a corresponding locked rotor adjustment coefficient according to the rotating speed of the motor system; and calculating a corresponding locked rotor torque coefficient according to the locked rotor adjusting coefficient, and the locked rotor torque and the rated torque of the motor system.
The locked rotor protection device of the motor system provided by the embodiment can be applied to the locked rotor protection method of the motor system provided by any embodiment, and has corresponding functions and beneficial effects.
Example four
Fig. 5 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention. As shown in fig. 5, the vehicle includes a processor 50, a storage device 51, and a motor system 52; the number of processors 50 in the vehicle may be one or more, and one processor 50 is illustrated in fig. 5; the processor 50, the storage device 51 and the motor system 52 of the vehicle may be connected by a bus or other means, as exemplified by the bus connection in fig. 5.
The storage device 51, which is a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as modules corresponding to the locked rotor protection method of the motor system in the embodiment of the present invention (for example, the current overload coefficient calculation module 410 and the running torque adjustment module 420 in the locked rotor protection device for the motor system). The processor 50 executes various functional applications and data processing of the vehicle by running software programs, instructions and modules stored in the storage device 51, that is, implements the stall protection method of the motor system described above.
The storage device 51 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the storage 51 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage device 51 may further include memory located remotely from the processor 50, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The motor system 52 may be used to control vehicle operation to power the vehicle.
The vehicle provided by the embodiment can be used for executing the locked rotor protection method of the motor system provided by any embodiment, and has corresponding functions and beneficial effects.
EXAMPLE five
Fifth, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, can implement the locked rotor protection method for the motor system in any of the above embodiments. The method specifically comprises the following steps:
calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked-rotor torque coefficient of the motor system and a conversion relation between torque and current;
and if the accumulated heat of the motor system exceeds the heat calibration upper limit, adjusting the running torque of the motor system by adopting a preset derating coefficient, wherein the accumulated heat of the motor system is caused by a current overload coefficient.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the locked rotor protection method for the motor system provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the locked-rotor protection device for an electric motor system, the included units and modules are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A locked-rotor protection method of a motor system is characterized by comprising the following steps:
calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked-rotor torque coefficient of the motor system and a conversion relation between torque and current;
and if the accumulated heat of the motor system exceeds the heat calibration upper limit, adjusting the running torque of the motor system by adopting a preset derating coefficient, wherein the accumulated heat of the motor system is caused by the current overload coefficient.
2. The method of claim 1, further comprising:
and if the length of time that the motor system is in the locked-rotor working condition reaches the preset locked-rotor length, controlling the motor system to enter a derating protection stage until the accumulated heat of the motor system is dissipated to a preset heat, and controlling the motor system to enter a derating removing stage.
3. The method of claim 2, wherein adjusting the operating torque of the electric machine system using a preset derating factor comprises:
in the derating protection stage, if the accumulated heat of the motor system exceeds the heat calibration upper limit and the running torque of the motor system exceeds the rated torque, the running torque of the motor system is adjusted according to a preset derating coefficient, and the adjusted running torque is adopted to control the motor system to work so as to enable the motor system to dissipate heat.
4. The method of claim 3, further comprising:
and in the derating removing stage, controlling the motor system to work by adopting a torque command of the motor system.
5. The method of claim 1, wherein calculating a corresponding current overload factor based on a torque overload factor and a locked rotor torque factor of the electric machine system and a transfer relationship between torque and current comprises:
superposing the torque overload coefficient and the locked-rotor torque coefficient of the motor system to obtain a corresponding integrated torque overload coefficient;
and converting the integrated torque overload coefficient according to the conversion relation between the torque and the current to obtain a corresponding current overload coefficient.
6. The method of claim 1 or 5, further comprising:
and calculating a corresponding torque overload coefficient according to the actual torque and the rated torque of the motor system.
7. The method of claim 1 or 5, further comprising:
determining a corresponding locked-rotor adjustment coefficient according to the rotating speed of the motor system;
and calculating a corresponding locked rotor torque coefficient according to the locked rotor adjusting coefficient, and the locked rotor torque and the rated torque of the motor system.
8. A locked rotor protection device of a motor system is characterized by comprising:
the current overload coefficient calculation module is used for calculating a corresponding current overload coefficient according to a torque overload coefficient and a locked rotor torque coefficient of the motor system and a conversion relation between torque and current;
and the running torque adjusting module is used for adjusting the running torque of the motor system by adopting a preset derating coefficient if the accumulated heat of the motor system exceeds the heat calibration upper limit, wherein the accumulated heat of the motor system is caused by the current overload coefficient.
9. A vehicle, characterized in that the vehicle comprises:
one or more processors;
storage means for storing one or more programs;
the motor system is used for controlling the vehicle to run;
when executed by the one or more processors, cause the one or more processors to implement the stall protection method for an electric motor system of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a method for stall protection of an electric machine system according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016513.0A CN110829948B (en) | 2019-10-24 | 2019-10-24 | Locked-rotor protection method and device for motor system, vehicle and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016513.0A CN110829948B (en) | 2019-10-24 | 2019-10-24 | Locked-rotor protection method and device for motor system, vehicle and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110829948A true CN110829948A (en) | 2020-02-21 |
| CN110829948B CN110829948B (en) | 2021-06-22 |
Family
ID=69550362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911016513.0A Active CN110829948B (en) | 2019-10-24 | 2019-10-24 | Locked-rotor protection method and device for motor system, vehicle and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110829948B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111572349A (en) * | 2020-05-18 | 2020-08-25 | 安徽江淮汽车集团股份有限公司 | Electric vehicle locked-rotor fault detection method, device, equipment and storage medium |
| 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 |
| CN112366655A (en) * | 2020-11-04 | 2021-02-12 | 浙江万里扬股份有限公司 | Motor locked-rotor protection method, vehicle and computer-readable storage medium |
| CN113422348A (en) * | 2021-06-08 | 2021-09-21 | 浙江大学 | Temperature limit value determining method and device and permanent magnet synchronous motor control method and device |
| CN114083989A (en) * | 2021-12-24 | 2022-02-25 | 天津英捷利汽车技术有限责任公司 | Current inverse time limit protection method for pure electric vehicle |
| CN115158030A (en) * | 2022-06-28 | 2022-10-11 | 一汽奔腾轿车有限公司 | New energy automobile driving motor controller inverse time limit derating method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7034499B2 (en) * | 2003-10-03 | 2006-04-25 | Rt Patent Company, Inc. | Electromagnetic motor |
| US9641122B2 (en) * | 2012-06-26 | 2017-05-02 | Johnson Controls Technology Company | HVAC actuator with automatic end stop recalibration |
| CN106627741A (en) * | 2016-09-14 | 2017-05-10 | 浙江吉利控股集团有限公司 | Motor thermal protection system and method based on motor and ECU separated type electric power steering system |
| CN107240906A (en) * | 2017-08-02 | 2017-10-10 | 欧瑞传动电气股份有限公司 | Motor rotation blockage protects control method |
| CN109532514A (en) * | 2018-12-18 | 2019-03-29 | 深圳市英威腾电动汽车驱动技术有限公司 | A kind of power drive system rotation-clogging protection method, electric machine controller and electric car |
-
2019
- 2019-10-24 CN CN201911016513.0A patent/CN110829948B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7034499B2 (en) * | 2003-10-03 | 2006-04-25 | Rt Patent Company, Inc. | Electromagnetic motor |
| US9641122B2 (en) * | 2012-06-26 | 2017-05-02 | Johnson Controls Technology Company | HVAC actuator with automatic end stop recalibration |
| CN106627741A (en) * | 2016-09-14 | 2017-05-10 | 浙江吉利控股集团有限公司 | Motor thermal protection system and method based on motor and ECU separated type electric power steering system |
| CN107240906A (en) * | 2017-08-02 | 2017-10-10 | 欧瑞传动电气股份有限公司 | Motor rotation blockage protects control method |
| CN109532514A (en) * | 2018-12-18 | 2019-03-29 | 深圳市英威腾电动汽车驱动技术有限公司 | A kind of power drive system rotation-clogging protection method, electric machine controller and electric car |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111572349A (en) * | 2020-05-18 | 2020-08-25 | 安徽江淮汽车集团股份有限公司 | Electric vehicle locked-rotor fault detection method, device, equipment and storage medium |
| CN111572349B (en) * | 2020-05-18 | 2021-07-30 | 安徽江淮汽车集团股份有限公司 | Electric vehicle locked-rotor fault detection method, device, equipment and storage medium |
| 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 |
| CN112366655A (en) * | 2020-11-04 | 2021-02-12 | 浙江万里扬股份有限公司 | Motor locked-rotor protection method, vehicle and computer-readable storage medium |
| CN112366655B (en) * | 2020-11-04 | 2022-12-13 | 浙江万里扬股份有限公司 | Motor locked-rotor protection method, vehicle and computer-readable storage medium |
| CN113422348A (en) * | 2021-06-08 | 2021-09-21 | 浙江大学 | Temperature limit value determining method and device and permanent magnet synchronous motor control method and device |
| CN113422348B (en) * | 2021-06-08 | 2023-06-27 | 浙江大学 | Temperature limit value determining method, permanent magnet synchronous motor control method and device |
| CN114083989A (en) * | 2021-12-24 | 2022-02-25 | 天津英捷利汽车技术有限责任公司 | Current inverse time limit protection method for pure electric vehicle |
| CN115158030A (en) * | 2022-06-28 | 2022-10-11 | 一汽奔腾轿车有限公司 | New energy automobile driving motor controller inverse time limit derating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110829948B (en) | 2021-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110829948B (en) | Locked-rotor protection method and device for motor system, vehicle and storage medium | |
| US9018878B2 (en) | Derating vehicle electric drive motor and generator components | |
| US6268986B1 (en) | Motor control unit | |
| CN109532514B (en) | Locked-rotor protection method for electric drive system, motor controller and electric vehicle | |
| DE112006003016T5 (en) | Motor driving device | |
| CN109823193B (en) | Electric automobile operation control method and device, controller and storage medium | |
| JP6072290B2 (en) | Inverter protection device for vehicle | |
| CN103166540B (en) | A kind of conservation treatment method of brake resistance in AC servo drive system | |
| DE112018000652T5 (en) | Motor controller | |
| CN110518550A (en) | Power module method for excessive heating protection, computer installation and computer readable storage medium | |
| JP6962455B2 (en) | Equipment protection device and equipment protection method | |
| JP6844702B2 (en) | Equipment protection device and equipment protection method | |
| JP4848976B2 (en) | Electric motor control device | |
| CN110556793B (en) | Real-time IGBT overload protection method | |
| CN115764808A (en) | Locked-rotor protection method, device, equipment and storage medium for electric drive system | |
| JP3430907B2 (en) | Inverter thermal protection device and thermal protection method for conductive heating element | |
| JP7142719B2 (en) | motor controller | |
| CN112874313B (en) | Method for controlling a vehicle, vehicle and medium | |
| JP2008228447A (en) | Drive device of switching element | |
| KR102056156B1 (en) | Inverter Protecting Method of Electric Vehicle | |
| DE10255371A1 (en) | 3-phase AC motor controller with an overcurrent protection function | |
| JP5724653B2 (en) | Electric vehicle motor control device | |
| JP2019118192A (en) | Control device for inverter | |
| CN114665761B (en) | Wind power yaw brake resistor overheating protection control method, circuit, device and equipment | |
| JP3364361B2 (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |