CN115173753A - Bus voltage reduction processing method for pump type permanent magnet synchronous motor - Google Patents
Bus voltage reduction processing method for pump type permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN115173753A CN115173753A CN202210673482.1A CN202210673482A CN115173753A CN 115173753 A CN115173753 A CN 115173753A CN 202210673482 A CN202210673482 A CN 202210673482A CN 115173753 A CN115173753 A CN 115173753A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- synchronous motor
- magnet synchronous
- type permanent
- pump type
- 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.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 151
- 238000003672 processing method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 11
- 238000005461 lubrication Methods 0.000 abstract description 6
- 230000010355 oscillation Effects 0.000 abstract description 4
- 230000001174 ascending effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
-
- 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
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
-
- 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)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a bus voltage reduction processing method of a pump permanent magnet synchronous motor, which is used for adjusting the rotating speed of the pump permanent magnet synchronous motor in real time by detecting the actual value of the bus voltage of an electric drive vehicle, and particularly, in the rotating speed adjusting process, the rotating speed is switched only when the bus voltage is lower than or higher than a set voltage value in the descending stage and the ascending stage of the bus voltage by setting a bus voltage critical value cross zone of the electric drive vehicle, so that the phenomena of unstable rotating speed, oscillation and frequent switching of the rotating speed of the pump permanent magnet synchronous motor near the voltage critical value can be effectively avoided, and the serious faults such as insufficient system cooling, over-temperature fault of key electrical components, pressure loss of a brake system, insufficient lubrication of a transmission system, even gear shifting of a transmission and the like and other relevance problems can be avoided when the undervoltage of the electric drive vehicle permanent magnet synchronous motor is subjected to undervoltage fault on the premise of meeting the functional requirements of an electric drive system.
Description
Technical Field
The invention belongs to the technical field of fault processing control of permanent magnet synchronous motors for vehicles, and particularly relates to a bus voltage reduction processing method of a pump permanent magnet synchronous motor.
Background
The motor and a control system thereof are key parts of an electrically driven vehicle, and a control algorithm and a fault emergency protection strategy thereof have direct influence on the performance of the vehicle. The permanent magnet synchronous motor control technology is one of the core technologies of an electric drive vehicle, and the research of the permanent magnet synchronous motor and the application of the permanent magnet synchronous motor in an electric drive vehicle system are more and more extensive due to the unique performance advantages of the permanent magnet synchronous motor and the abundant raw material reserves of permanent magnets in China.
The application scenario of the vehicle pump type permanent magnet synchronous motor is that key equipment such as an oil pump and a water pump for driving an engine, a gearbox and a brake works, when the pump type motor breaks down, the pump type motor stops working immediately, so that the equipment such as the oil pump and the water pump stops rotating rapidly, serious faults such as insufficient cooling of a vehicle system, over-temperature fault of key electrical components, pressure loss of a brake system, insufficient lubrication of a transmission system, even gear disengagement of a transmission and the like can be caused, and other related problems are caused, so that the fault processing control technology of the vehicle pump type permanent magnet synchronous motor is very important.
When the pump type permanent magnet synchronous motor has an undervoltage fault, the general processing mode is to close the IGBT, stop the motor, and prevent the controller from fault caused by overlarge current. The electric drive vehicle has more electronic components which are sensitive to temperature, the gear shifting of the gearbox also depends heavily on the pump type permanent magnet synchronous motor to drive the oil pump to establish oil pressure, the pump has the characteristic that the load torque is reduced along with the reduction of the rotating speed, and as the load of the pump motor is large and the reduction time is short, once the oil pump and the water pump stop working, a cooling system and a hydraulic system of the electric drive vehicle stop working immediately, and the serious fault of the electric drive vehicle is easily caused, so the traditional method for processing the undervoltage fault of the pump type permanent magnet synchronous motor for the vehicle is not suitable for the pump type permanent magnet synchronous motor for the electric drive vehicle.
Disclosure of Invention
In order to solve the problems, the invention provides a bus voltage reduction processing method of a pump type permanent magnet synchronous motor, which can effectively avoid the phenomena of unstable rotating speed, oscillation and frequent switching of the rotating speed of the pump type permanent magnet synchronous motor near a voltage critical value by setting a bus voltage critical value cross zone of an electric drive vehicle.
A bus voltage reduction processing method of a pump type permanent magnet synchronous motor is characterized in that the rotating speed of the pump type permanent magnet synchronous motor is adjusted in real time by detecting the bus voltage U of an electrically driven vehicle, so that the undervoltage fault processing of the pump type permanent magnet synchronous motor is realized;
when the bus voltage U is not less than a set value U0, the pump type permanent magnet synchronous motor keeps working at a rated rotating speed value n0; when the bus voltage U is reduced to be smaller than the set value U0, judging the size of the bus voltage U and the set value U1 again, if the bus voltage U is not smaller than U1, continuously maintaining the pump type permanent magnet synchronous motor to work at a rated rotating speed value n0, wherein U1 is smaller than U0; when the bus voltage U is reduced to be smaller than a set value U1, judging the size of the bus voltage U and a set value U2 again, if the bus voltage U is not smaller than U2, continuously maintaining the pump type permanent magnet synchronous motor to work at a rated rotating speed value n0, wherein U2 is smaller than U1; when the bus voltage U is reduced to be smaller than U2, judging the size of the bus voltage U and a set value U3 again, wherein U3 is smaller than U2, if the bus voltage U is not smaller than U3, the pump type permanent magnet synchronous motor is maintained to work at a set lowest rotating speed value n1 and is continuously compared with the set value U1, and when the bus voltage U is higher than U1, the rotating speed of the pump type permanent magnet synchronous motor is recovered to a rated rotating speed value n0; and when the bus voltage U is reduced to be less than U3, the pump type permanent magnet synchronous motor stops working.
Further, when the pump type permanent magnet synchronous motor is used for driving a transmission oil pump on an electric drive vehicle, determining a rated rotating speed value n0 of the pump type permanent magnet synchronous motor according to a relation curve between the flow rate and the rotating speed of the transmission oil pump; and determining the lowest rotating speed value n1 of the pump permanent magnet synchronous motor according to the lowest flow demand of the gearbox hydraulic system.
Further, when the pump type permanent magnet synchronous motor is used for driving a brake oil pump on an electric drive vehicle, determining a rated rotating speed value n0 of the pump type permanent magnet synchronous motor according to the hydraulic system flow required by brake pressure of a brake; and determining the lowest rotating speed value n1 of the pump type permanent magnet synchronous motor according to the lowest flow demand of the brake hydraulic system.
Further, when the pump type permanent magnet synchronous motor is used for driving a cooling water circulating pump on an electric drive vehicle, determining a rated rotating speed value n0 of the pump type permanent magnet synchronous motor according to a relation curve between the flow rate and the rotating speed of the cooling water circulating pump; and determining the minimum rotating speed value n1 of the pump type permanent magnet synchronous motor according to the minimum flow demand of the parts needing cooling on the electrically driven vehicle.
Further, the set value U0 is a normal bus voltage value of the pump-type permanent magnet synchronous motor, and U0 is determined according to a voltage system adopted by the electrically driven vehicle; the set value U1 is the lowest voltage value of the pump type permanent magnet synchronous motor in normal operation, and the U1 is determined according to the back electromotive force of the rated rotating speed value n0 of the pump type permanent magnet synchronous motor; the set value U2 is determined according to the counter potential of the pump type permanent magnet synchronous motor and the lowest rotating speed value n1 of the pump type permanent magnet synchronous motor; the set value U3 is determined according to the IGBT capacity of the pump permanent magnet synchronous motor controller.
Has the advantages that:
1. the invention provides a bus voltage reduction processing method of a pump permanent magnet synchronous motor, which is used for adjusting the rotating speed of the pump permanent magnet synchronous motor in real time by detecting the actual value of the bus voltage of an electric drive vehicle, and particularly, in the rotating speed adjusting process, the rotating speed is switched only when the bus voltage is lower than or higher than a set voltage value in the descending stage and the ascending stage of the bus voltage by setting a bus voltage critical value cross zone of the electric drive vehicle, so that the phenomena of unstable rotating speed, oscillation and frequent switching of the rotating speed of the pump permanent magnet synchronous motor near the voltage critical value can be effectively avoided, and the serious faults such as insufficient system cooling, over-temperature fault of key electrical components, pressure loss of a brake system, insufficient lubrication of a transmission system, even gear shifting of a transmission and the like and other relevance problems can be avoided when the undervoltage of the electric drive vehicle permanent magnet synchronous motor is subjected to undervoltage fault on the premise of meeting the functional requirements of an electric drive system.
2. The invention provides a bus voltage reduction processing method of a pump permanent magnet synchronous motor, which determines a rated rotating speed value n0 of the pump permanent magnet synchronous motor and a minimum rotating speed value n1 of the pump permanent magnet synchronous motor according to the application of the pump permanent magnet synchronous motor on an electric drive vehicle, and can better solve the problem of the undervoltage fault of the pump permanent magnet synchronous motor of the electric drive vehicle under different working conditions.
3. The invention provides a bus voltage reduction processing method of a pump permanent magnet synchronous motor, which is used for grading the bus voltage of the pump permanent magnet synchronous motor and providing a determination method of each grading voltage critical value, so that the problem of undervoltage faults of the pump permanent magnet synchronous motor of an electrically driven vehicle under different working conditions can be better solved.
Drawings
Fig. 1 is a flowchart of a bus voltage reduction processing method for a pump type permanent magnet synchronous motor according to the present invention;
FIG. 2 is a schematic diagram of the speed conversion of the cross-over zone of the bus voltage threshold provided by the present invention;
fig. 3 is a schematic diagram of a method for controlling the rotation speed recovery of a pump-type permanent magnet synchronous motor according to the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
The invention provides a bus voltage reduction processing method for a pump type permanent magnet synchronous motor, which aims to reduce the working capacity of the pump type permanent magnet synchronous motor on the premise of meeting the functional requirements of an electric drive system, and avoid serious faults such as insufficient system cooling, over-temperature faults of key electrical components, pressure loss of a brake system, insufficient lubrication of a transmission system, even gear disengagement of a transmission and the like and other relevance problems when the pump type permanent magnet synchronous motor of an electric drive vehicle is in an undervoltage fault as far as possible.
Specifically, as shown in fig. 1, a bus voltage reduction processing method for a pump type permanent magnet synchronous motor includes the following steps:
firstly, performing power-on self-test on a pump permanent magnet synchronous motor and a control system thereof;
after self-checking is completed, the pump type permanent magnet synchronous motor works in a state of normal bus voltage U0 of the electrically driven vehicle, and the rotating speed of the pump type permanent magnet synchronous motor is maintained at n0;
a pump type permanent magnet synchronous motor control system circularly acquires a bus voltage signal of an electrically driven vehicle and a rotating speed signal of a pump type permanent magnet synchronous motor and carries out system fault diagnosis;
that is to say, the invention adjusts the rotating speed of the pump type permanent magnet synchronous motor in real time by detecting the bus voltage U of the electrically driven vehicle, thereby realizing the undervoltage fault treatment of the pump type permanent magnet synchronous motor;
as shown in fig. 2, when the bus voltage U is not less than the set value U0, the pump type permanent magnet synchronous motor is maintained at the rated rotation speed value n0 to operate; when the bus voltage U is reduced to be smaller than a set value U0, judging the size of the bus voltage U and the set value U1 again, if the bus voltage U is not smaller than U1, continuously maintaining the pump type permanent magnet synchronous motor to work at a rated rotating speed value n0, wherein U1 is smaller than U0; when the bus voltage U is reduced to be smaller than a set value U1, judging the size of the bus voltage U and a set value U2 again, if the bus voltage U is not smaller than U2, continuously maintaining the pump type permanent magnet synchronous motor to work at a rated rotating speed value n0, wherein U2 is smaller than U1; when the bus voltage U is reduced to be smaller than U2, judging the size of the bus voltage U and a set value U3 again, wherein U3 is smaller than U2, if the bus voltage U is not smaller than U3, the pump type permanent magnet synchronous motor is maintained to work at a set lowest rotating speed value n1 and is continuously compared with the set value U1, and when the bus voltage U is higher than U1, the rotating speed of the pump type permanent magnet synchronous motor is recovered to a rated rotating speed value n0; and when the bus voltage U is reduced to be less than U3, the pump type permanent magnet synchronous motor stops working.
It should be noted that the invention adopts voltage set values U0, U1, U2, U3 to realize the classification of the bus voltage of the pump type permanent magnet synchronous motor, wherein the invention determines the normal bus voltage value U0 of the pump type permanent magnet synchronous motor according to the voltage system adopted by the electrically driven vehicle; determining a lowest voltage value U1 of normal operation according to the back electromotive force of a rated rotating speed value n0 of the pump permanent magnet synchronous motor, wherein the design value of the back electromotive force of the motor is generally required to be not more than the normal fluctuation value of bus voltage; the voltage value U2 is determined according to the counter potential of the pump type permanent magnet synchronous motor and the lowest rotating speed value n1 of the pump type permanent magnet synchronous motor; the voltage value U3 is determined according to the capacity of the IGBT of the pump permanent magnet synchronous motor controller.
How to obtain the rated rotation speed value n0, the minimum rotation speed value n1 and the rotation speed value n2 when the pump type permanent magnet synchronous motor stops working is described below.
The rated rotating speed value n0 of the pump type permanent magnet synchronous motor, the minimum rotating speed value n1 of the pump type permanent magnet synchronous motor and the stop working rotating speed value n2 of the pump type permanent magnet synchronous motor are determined according to the application of the pump type permanent magnet synchronous motor on an electric drive vehicle, and it should be noted that when the pump type permanent magnet synchronous motor stops working, the stop working rotating speed value n2 is usually 0.
The first purpose is as follows: when the pump type permanent magnet synchronous motor is used for driving an oil pump of a gearbox on an electrically driven vehicle, determining a rated rotating speed value n0 of the pump type permanent magnet synchronous motor by combining a relation curve of the flow of the oil pump and the rotating speed according to the pressure of a hydraulic system meeting the requirement of establishing a gear of the gearbox, the flow of the hydraulic system meeting the lubricating requirement of the gearbox and the flow of the oil pump meeting other requirements of the gearbox; and determining the minimum rotating speed value n1 of the pump permanent magnet synchronous motor according to the minimum flow requirement of the hydraulic system of the gearbox.
The second purpose is as follows: when the pump type permanent magnet synchronous motor is used for driving a brake oil pump on an electrically driven vehicle, determining a rated rotating speed value n0 of the pump type permanent magnet synchronous motor according to the flow of a hydraulic system meeting the brake pressure requirement of a brake; and determining the minimum rotating speed value n1 of the pump type permanent magnet synchronous motor according to the minimum flow requirement of the hydraulic system of the brake.
The third purpose is as follows: when the pump type permanent magnet synchronous motor is used for driving a cooling water circulating pump on an electric drive vehicle, determining a rated rotating speed value n0 of the pump type permanent magnet synchronous motor according to circulating water flow meeting the requirements of an engine, a motor controller, a power battery and other components needing cooling on the electric drive vehicle and a relation curve of water pump flow and rotating speed; and determining the minimum rotating speed value n1 of the permanent magnet synchronous motor of the pump according to the minimum flow demand of the parts needing cooling on the electric drive vehicle.
It should be noted that the invention adjusts the rotating speed of the pump type permanent magnet synchronous motor in real time by detecting the actual value of the bus voltage of the electric drive vehicle, thereby avoiding serious faults such as insufficient system cooling, over-temperature fault of key electrical components, pressure loss of a braking system, insufficient lubrication of a transmission system, even gear disengagement of a transmission and the like and other relevance problems when the pump type permanent magnet synchronous motor of the electric drive vehicle has an under-voltage fault as much as possible.
When detecting that the bus voltage of the electrically driven vehicle is a voltage value U0, the pump type permanent magnet synchronous motor works at a rotating speed value n0; in the continuous reduction stage of the bus voltage, before the bus voltage of the electric drive vehicle is reduced to a voltage value U1, the rotating speed of the pump type permanent magnet synchronous motor is maintained at a rotating speed value n0, the rotating speed of the pump type permanent magnet synchronous motor is not interfered, and the rotating speed of the pump type permanent magnet synchronous motor is reduced to a rotating speed value n1 until the bus voltage of the electric drive vehicle is reduced to a voltage value U2; when the voltage of the bus of the electric drive vehicle is reduced to a voltage value U3, the IGBT of the pump type permanent magnet synchronous motor controller is turned off, the pump type permanent magnet synchronous motor stops working, and the rotating speed of the pump type permanent magnet synchronous motor is reduced to a rotating speed value n2, namely the rotating speed is 0.
Further, when the voltage of the bus of the electric drive vehicle is lower than the normal voltage value U0, undervoltage fault processing is carried out on the pump type permanent magnet synchronous motor according to the method. In order not to affect the normal work of a hydraulic system and a cooling system of the electric drive vehicle, when the bus voltage of the electric drive vehicle is recovered to a normal voltage value U0, the rotating speed of the pump permanent magnet synchronous motor should be recovered to a rated rotating speed value n0. When the bus voltage of the electric drive vehicle is in a critical value, namely voltage set values U0, U1, U2 and U3, the rotation speed of the pump type permanent magnet synchronous motor may be unstable and oscillatory along with small fluctuation of the voltage, and even the phenomenon of frequent switching of the rotation speed may occur.
To prevent this, a bus voltage threshold crossing zone of the electrically driven vehicle is set, the bus voltage crossing zone having a range of [ U2, U1], as shown in fig. 2. When the bus voltage of the electrically driven vehicle is in a range [ U2, U0], the pump type permanent magnet synchronous motor works at a rotating speed value n0; when the bus voltage of the electrically driven vehicle is in a range [ U1, U3], the pump type permanent magnet synchronous motor works at a rotating speed value n1; when the voltage of the electric drive vehicle bus is lower than the voltage value U3, the pump type permanent magnet synchronous motor works at a rotating speed value n2. It should be noted that, in the phase of bus voltage decrease, when the bus voltage of the electric drive vehicle is lower than the voltage value U2, the rotation speed of the pump type permanent magnet synchronous motor will decrease to n1, in the phase of bus voltage increase, when the bus voltage of the electric drive vehicle is higher than the voltage value U1, the rotation speed of the pump type permanent magnet synchronous motor will recover to n0, and when the bus voltage of the electric drive vehicle is lower than the voltage value U3, the rotation speed of the pump type permanent magnet synchronous motor cannot recover.
In summary, as shown in fig. 3, the present invention specifically provides a method for determining a rotation speed of a pump-type permanent magnet synchronous motor, a method for processing a bus voltage step-by-step release, an undervoltage fault, and a method for controlling a rotation speed recovery, and compared with the prior art, the present invention provides a method for processing a bus voltage reduction of a pump-type permanent magnet synchronous motor, which detects an actual bus voltage value of an electrically driven vehicle to adjust the rotation speed of the pump-type permanent magnet synchronous motor in real time to reduce the working capacity of the pump-type permanent magnet synchronous motor when the bus voltage of the electrically driven vehicle is lower than a normal working voltage, and avoids serious faults such as insufficient system cooling, excessive temperature fault of a key electrical component, pressure loss of a brake system, insufficient lubrication of a transmission system, even a transmission gear shift, and other related problems when the undervoltage fault of the electrically driven vehicle pump-type permanent magnet synchronous motor occurs on the premise of satisfying a functional requirement of the electrically driven system. When the bus voltage of the electrically driven vehicle is recovered, the rotating speed of the pump type permanent magnet synchronous motor is recovered to a normal working state by the rotating speed recovery control method of the pump type permanent magnet synchronous motor. According to the invention, through setting the bus voltage critical value crossing zone of the electrically driven vehicle, the phenomena of unstable rotating speed, oscillation and frequent rotating speed switching of the pump type permanent magnet synchronous motor near the voltage critical value can be effectively avoided.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it will be understood by those skilled in the art that various changes and modifications may be made herein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A bus voltage reduction processing method of a pump type permanent magnet synchronous motor is characterized in that the rotating speed of the pump type permanent magnet synchronous motor is adjusted in real time by detecting the bus voltage U of an electrically driven vehicle, so that the undervoltage fault processing of the pump type permanent magnet synchronous motor is realized;
when the bus voltage U is not less than a set value U0, the pump type permanent magnet synchronous motor keeps working at a rated rotating speed value n0; when the bus voltage U is reduced to be smaller than a set value U0, judging the size of the bus voltage U and the set value U1 again, if the bus voltage U is not smaller than U1, continuously maintaining the pump type permanent magnet synchronous motor to work at a rated rotating speed value n0, wherein U1 is smaller than U0; when the bus voltage U is reduced to be smaller than a set value U1, judging the size of the bus voltage U and a set value U2 again, if the bus voltage U is not smaller than U2, continuously maintaining the pump type permanent magnet synchronous motor to work at a rated rotating speed value n0, wherein U2 is smaller than U1; when the bus voltage U is reduced to be smaller than U2, judging the size of the bus voltage U and a set value U3 again, wherein U3 is smaller than U2, if the bus voltage U is not smaller than U3, maintaining the pump type permanent magnet synchronous motor to work at a set minimum rotating speed value n1, continuously comparing the pump type permanent magnet synchronous motor with the set value U1, and when the bus voltage U is higher than U1, recovering the rotating speed of the pump type permanent magnet synchronous motor to a rated rotating speed value n0; and when the bus voltage U is reduced to be less than U3, the pump type permanent magnet synchronous motor stops working.
2. The bus bar voltage reduction processing method of the pump type permanent magnet synchronous motor according to claim 1, wherein when the pump type permanent magnet synchronous motor is used for driving a transmission oil pump on an electrically driven vehicle, a rated rotating speed value n0 of the pump type permanent magnet synchronous motor is determined according to a relation curve between the flow rate and the rotating speed of the transmission oil pump; and determining the lowest rotating speed value n1 of the pump permanent magnet synchronous motor according to the lowest flow demand of the gearbox hydraulic system.
3. The bus bar voltage reduction processing method of the pump type permanent magnet synchronous motor according to claim 1, characterized in that when the pump type permanent magnet synchronous motor is used for driving a brake oil pump on an electrically driven vehicle, a rated rotating speed value n0 of the pump type permanent magnet synchronous motor is determined according to a hydraulic system flow required by brake pressure of a brake; and determining the lowest rotating speed value n1 of the pump type permanent magnet synchronous motor according to the lowest flow demand of the brake hydraulic system.
4. The bus bar voltage reduction processing method of the pump type permanent magnet synchronous motor according to claim 1, characterized in that when the pump type permanent magnet synchronous motor is used for driving a cooling water circulating pump on an electrically driven vehicle, a rated rotating speed value n0 of the pump type permanent magnet synchronous motor is determined according to a relation curve between the flow rate and the rotating speed of the cooling water circulating pump; and determining the minimum rotating speed value n1 of the pump type permanent magnet synchronous motor according to the minimum flow demand of the parts needing cooling on the electrically driven vehicle.
5. The bus bar voltage reduction processing method of the pump type permanent magnet synchronous motor according to any one of claims 1 to 4, wherein the set value U0 is a normal bus bar voltage value of the pump type permanent magnet synchronous motor, and U0 is determined according to a voltage system adopted by an electrically driven vehicle; the set value U1 is the lowest voltage value of the pump type permanent magnet synchronous motor in normal operation, and the U1 is determined according to the back electromotive force of the rated rotating speed value n0 of the pump type permanent magnet synchronous motor; the set value U2 is determined according to the counter potential of the pump type permanent magnet synchronous motor and the lowest rotating speed value n1 of the pump type permanent magnet synchronous motor; the set value U3 is determined according to the IGBT capacity of the pump permanent magnet synchronous motor controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210673482.1A CN115173753A (en) | 2022-06-14 | 2022-06-14 | Bus voltage reduction processing method for pump type permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210673482.1A CN115173753A (en) | 2022-06-14 | 2022-06-14 | Bus voltage reduction processing method for pump type permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115173753A true CN115173753A (en) | 2022-10-11 |
Family
ID=83486237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210673482.1A Pending CN115173753A (en) | 2022-06-14 | 2022-06-14 | Bus voltage reduction processing method for pump type permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115173753A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607155A (en) * | 2013-10-28 | 2014-02-26 | 浙江大学 | Permanent-magnet synchronous-motor position-free-sensor control method based on rotating-current vectors |
| WO2015025886A1 (en) * | 2013-08-22 | 2015-02-26 | 日立建機株式会社 | Construction machine |
-
2022
- 2022-06-14 CN CN202210673482.1A patent/CN115173753A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015025886A1 (en) * | 2013-08-22 | 2015-02-26 | 日立建機株式会社 | Construction machine |
| CN103607155A (en) * | 2013-10-28 | 2014-02-26 | 浙江大学 | Permanent-magnet synchronous-motor position-free-sensor control method based on rotating-current vectors |
Non-Patent Citations (2)
| Title |
|---|
| 刘亚成;周广明;李慎龙;唐沛;: "车用永磁同步电机控制系统研究与仿真分析", 机电技术, no. 05, 30 October 2015 (2015-10-30) * |
| 黄堃;张楠;黄麟;: "双Y移30°永磁同步电机逆变器开路故障诊断方法", 微电机, no. 01, 28 January 2020 (2020-01-28) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7956560B2 (en) | Control apparatus for rotational electric machine and driving apparatus for vehicle | |
| CN108023524A (en) | The open PMSM Drive System of winding and winding switchover policy | |
| CN111108681A (en) | Inverter control device | |
| CN111619351A (en) | Safety state control method and device and automobile | |
| DE112017007550T5 (en) | Multi-group multi-phase electric rotary machine operating device | |
| CN205951709U (en) | Anti - protection device that drags of permanent -magnet machine drive car | |
| CN105799541B (en) | Self-healing method for overcurrent fault of driving motor of electric automobile | |
| CN113787913B (en) | Fault response method and system for new energy automobile main drive controller | |
| CN103490681B (en) | Control the method and system of attached brushless DC motor of electric vehicle | |
| CN102336141A (en) | System and method for monitoring torque of electric automobile | |
| CN115173753A (en) | Bus voltage reduction processing method for pump type permanent magnet synchronous motor | |
| CN114771264A (en) | Electric drive system and control method and control device thereof | |
| CN103204081B (en) | Motor control system and method for electric cars | |
| CN107046381B (en) | A kind of switched reluctance machines varied angle PI control method, controller and speed-regulating system | |
| CN116653632A (en) | Control method and device for pure electric vehicle, pure electric vehicle and storage medium | |
| CN108528184B (en) | Electric drive cooling system and electric drive cooling control method | |
| CN113954656B (en) | Control method and device | |
| CN202076978U (en) | Intelligent brushless motor controller | |
| CN112428823B (en) | Method and system for restraining back electromotive force of permanent magnet synchronous motor of electric vehicle | |
| CN111559254B (en) | Multi-power coupling drive control device and method | |
| CN108928262B (en) | Steering and braking priority control system and control method for pure electric vehicle | |
| CN111987936B (en) | Method for realizing intelligent control of rotor string resistance of wound asynchronous motor | |
| CN108973684B (en) | Control method of vehicle auxiliary system | |
| CN113266557A (en) | Active band-type brake system of polyester melt metering pump for chemical industry | |
| CN217463181U (en) | Two-gear electric drive system for electric automobile |
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 |