CN109560746B - Overload protection method and device for electric vehicle driving system - Google Patents
Overload protection method and device for electric vehicle driving system Download PDFInfo
- Publication number
- CN109560746B CN109560746B CN201710877083.6A CN201710877083A CN109560746B CN 109560746 B CN109560746 B CN 109560746B CN 201710877083 A CN201710877083 A CN 201710877083A CN 109560746 B CN109560746 B CN 109560746B
- Authority
- CN
- China
- Prior art keywords
- current
- current value
- value
- maximum duration
- driving motor
- 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.)
- Active
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
-
- 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
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides an overload protection method and device for a driving system of an electric vehicle, which comprises the following steps of firstly detecting an actual current value actually input when a driving motor works and the continuous accumulated time when the current actually input by the driving motor is the current value; then determining the maximum duration when the output current of the motor controller is the actual current value and the maximum duration when the input current of the driving motor is the actual current value, and taking the smaller of the two as the maximum duration threshold when the working current of the driving system is the actual current value; and finally, judging whether the accumulated time is greater than a maximum duration threshold, and if so, starting overload protection. Because the maximum duration threshold of the overload protection of the driving system is smaller than the maximum duration of the driving motor and the maximum duration of the motor controller, the comprehensive control requirement of the driving system can be met simultaneously, and the reliability of the driving system is improved.
Description
Technical Field
The invention belongs to the technical field of electric vehicle protection control, and particularly relates to an overload protection method and device for an electric vehicle driving system.
Background
The electric vehicle is a vehicle using a power battery as a power source, and has the advantages of low noise, no pollution and the like compared with a vehicle using a traditional energy source as power, and the electric vehicle is more and more popularized in use today when the traditional energy storage amount is increasingly reduced and the environmental problem is more and more serious.
A drive system of an electric vehicle is generally provided with a drive motor and a motor controller, as shown in fig. 1, which controls an operation state of the drive motor by controlling voltage and current to the drive motor. In the running process of the vehicle, in order to prevent the motor controller and the driving motor from exceeding the maximum capacity of the motor controller and the driving motor to work, overload protection is set on corresponding devices in the motor controller and the driving motor. The overload protection of the driving motor controller means that when the output current of the motor controller exceeds the rated current of the motor controller, the motor controller can still continuously work for a period of time, but the junction temperature of an IGBT in the motor controller cannot be overhigh; the overload protection of the driving motor is a protection action that when the input current of the stator winding exceeds the rated current of the stator winding, the driving motor can still continuously work for a certain time, but the temperature of the winding cannot be overhigh.
Therefore, the overload protection of the driving system of the electric vehicle has important significance for safe and stable operation of the electric vehicle. However, manufacturers of motor controllers are often not unified with motor manufacturers, and the motor controllers cannot know the overload capacity of the driving motors, so that the overload protection of the driving system of the electric vehicle at present mainly aims at the motor controllers, such as a motor controller overload protection method and system disclosed in the patent application publication No. CN 105790677A. However, the technical solution disclosed in the above patent can only perform overload protection on the motor controller, but cannot perform comprehensive overload protection on the entire drive system, so that the reliability of overload protection of the drive system is reduced.
Disclosure of Invention
The invention aims to provide an overload protection method and device for an electric vehicle driving system, which are used for improving the reliability of the overload protection of the electric vehicle driving system.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
an overload protection method for a driving system of an electric vehicle comprises the following steps:
(1) detecting an actual current value actually input when the driving motor works and the accumulated time when the current actually input by the driving motor is the current value;
(2) determining the maximum duration when the output current of the motor controller is the actual current value and the maximum duration when the input current of the driving motor is the actual current value, and taking the smaller of the two as the maximum duration threshold when the working current of the driving system is the actual current value;
the maximum duration time when the output current of the motor controller is the actual current value is the time for a device on the motor controller to increase from a first set temperature value to a second set temperature value when the output current of the motor controller is the actual current value;
the maximum duration time when the input current of the driving motor is the actual current value is the time for the stator winding of the driving motor to rise from the third set temperature value to the fourth set temperature value when the input current of the driving motor is the actual current value;
(3) and judging whether the accumulated time is greater than a maximum duration threshold value, and if so, starting overload protection.
The technical scheme provided by the invention comprises the steps of firstly detecting the actual input current value of the driving motor, then determining the maximum duration time of the driving motor and the maximum duration time of the motor controller corresponding to the actual input current value of the driving motor, taking the smaller value of the maximum duration time as the maximum duration time threshold value of the overload protection of the driving system, and sending an overload alarm when the working time of the driving system under the current reaches the threshold value. The determined maximum duration threshold of the overload protection of the driving system is not more than the maximum duration of the driving motor and not more than the maximum duration of the motor controller, so that the overload protection requirements of the motor controller and the driving motor can be met simultaneously, the driving system is comprehensively controlled, and the reliability of the driving system is improved.
Further, dividing the current value which is larger than the rated current of the motor controller into a set number of continuous current intervals;
when the input current of the motor controller is tested to be the current value in each current interval, the time for the temperature of a device on the motor controller to rise from a first temperature value to a second temperature value is respectively used as the maximum duration time when the output current of the motor controller is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the output current of the motor controller is the actual current value.
Through actual test, the maximum duration of the motor controller under each output current is determined, and then the maximum duration when the output current of the motor controller is the actual current value is judged, so that the obtained data is more accurate.
Further, dividing the current value larger than the rated current of the driving motor into a set number of associated current intervals;
when the input current of the driving motor is tested to be the current value in each current interval, the time for increasing the temperature of a stator winding in the driving motor from a third set temperature value to a fourth set temperature value is taken as the maximum duration time when the input current of the driving motor is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the input current of the driving motor is the actual current value.
Through actual test, the maximum duration of the driving motor under each output current is determined, and then the maximum duration when the output current of the driving motor is the actual current value is judged, so that the obtained data are more accurate.
Further, the actual current value actually input when the driving motor works is a space phase current value calculated by a vector transformation rule according to a three-phase current value actually input when the driving motor works.
The driving motor is a three-phase motor, the current values of three phases need to be tested, and then the space phase current value is obtained through vector transformation and is used as the actual current value of the driving motor during working.
Further, the starting of the overload protection means that the output current of the motor controller is reduced to a set multiple of the actual current value within a set time period, wherein the set multiple is smaller than 1.
The output current of the motor controller is reduced, the working efficiency of the driving motor can be reduced, the motor controller or the driving motor is prevented from generating over-temperature, and the safety of a driving system is ensured.
An overload protection device of an electric vehicle driving system comprises a processor, wherein the processor is connected with a current detection device and is used for detecting the input current value of a driving motor;
the processor is provided with an overload protection module, and the overload protection module is used for:
detecting an actual current value actually input when the driving motor works and the accumulated time when the current actually input by the driving motor is the current value;
determining the maximum duration when the output current of the motor controller is the actual current value and the maximum duration when the input current of the driving motor is the actual current value, and taking the smaller of the two as the maximum duration threshold when the working current of the driving system is the actual current value;
the maximum duration time when the output current of the motor controller is the actual current value is the time for a device on the motor controller to increase from a first set temperature value to a second set temperature value when the output current of the motor controller is the actual current value;
the maximum duration time when the input current of the driving motor is the actual current value is the time for the stator winding of the driving motor to rise from the third set temperature value to the fourth set temperature value when the input current of the driving motor is the actual current value;
and judging whether the accumulated time is greater than a maximum duration threshold value, and if so, starting overload protection.
Further, dividing the current value which is larger than the rated current of the motor controller into a set number of continuous current intervals;
when the input current of the motor controller is tested to be the current value in each current interval, the time for the temperature of a device on the motor controller to rise from a first temperature value to a second temperature value is respectively used as the maximum duration time when the output current of the motor controller is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the output current of the motor controller is the actual current value.
Further, dividing the current value larger than the rated current of the driving motor into a set number of associated current intervals;
when the input current of the driving motor is tested to be the current value in each current interval, the time for increasing the temperature of a stator winding in the driving motor from a third set temperature value to a fourth set temperature value is taken as the maximum duration time when the input current of the driving motor is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the input current of the driving motor is the actual current value.
Further, the actual current value actually input when the driving motor works is a space phase current value calculated by a vector transformation rule according to a three-phase current value actually input when the driving motor works.
Further, the starting of the overload protection means that the output current of the motor controller is reduced to a set multiple of the actual current value within a set time period, wherein the set multiple is smaller than 1.
Further, the processor is integrated on the motor controller.
Drawings
FIG. 1 is a schematic diagram of a motor controller connected to a drive motor;
fig. 2 is a flowchart of an overload protection method of a driving system in an embodiment.
Detailed Description
The invention aims to provide an overload protection method and device for an electric vehicle driving system, which are used for improving the reliability of the overload protection of the electric vehicle driving system.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
(1) detecting an actual current value actually input when the driving motor works and the accumulated time when the current actually input by the driving motor is the current value;
(2) determining the maximum duration when the output current of the motor controller is the actual current value and the maximum duration when the input current of the driving motor is the actual current value, and taking the smaller of the two as the maximum duration threshold when the working current of the driving system is the actual current value;
the maximum duration time when the output current of the motor controller is the actual current value is the time for a device on the motor controller to increase from a first set temperature value to a second set temperature value when the output current of the motor controller is the actual current value;
the maximum duration time when the input current of the driving motor is the actual current value is the time for the stator winding of the driving motor to rise from the third set temperature value to the fourth set temperature value when the input current of the driving motor is the actual current value;
(3) and judging whether the accumulated time is greater than a maximum duration threshold value, and if so, starting overload protection.
The technical solution of the present invention is further illustrated by the following specific examples.
This embodiment provides an electric vehicle actuating system overload protection device, and the device includes the treater, is connected with current sensor on the treater, and current sensor is used for detecting driving motor's input current, and the treater can be the treater of solitary setting, also can integrate to set up on motor controller, is equipped with overload protection module, and this module is software module for carry out overload protection to actuating system according to driving motor's input current.
The control flow of the overload protection method of the overload protection module is shown in fig. 2, and the specific steps are as follows:
(1) establishing an overload characteristic table of the driving motor, as shown in table 1, wherein one part is a motor controller overload characteristic table, and the other part is a driving motor overload characteristic table;
the motor controller overload characteristic table is recorded in a table, and is the relationship between the output current of the motor controller and the maximum duration time measured by a bench test; on a test bed, controlling a motor controller to output 1.1-2 times of rated current of the motor controller; testing the time for the IGBT junction temperature of the motor controller to rise from a first set temperature value to a second set temperature value under the working condition that the output current of the motor controller is a certain current value, namely the maximum duration time of the motor controller under the current value; if the rated current of the motor controller is set to be Im, when the output current of the motor controller is between 1.1 & ltIm & gt and 1.2 & ltIm & gt, the time taken for the IGBT junction temperature of the motor controller to rise from a first set temperature value to a second set temperature value is t1, and the maximum duration time of the motor controller is determined to be t1 when the output current of the motor controller is between 1.1 & ltIm & gt and 1.2 & ltIm & gt; in the embodiment, the second set temperature value is 0.8-0.9 times of the maximum value of the junction temperature of the IGBT on the motor controller, and as other embodiments, the margin of the second set temperature value can be adjusted as required;
the motor controller overload characteristic table is recorded in a relationship between the input current of the driving motor and the maximum duration measured by a bench test; inputting 1.1-2 times of rated current of a motor controller to a driving motor on a test bench; testing the time for the driving motor to rise the temperature of the winding of the driving motor from a third set temperature value to a fourth set temperature value under the working condition that each input current is a certain current value, namely the maximum duration time of the driving motor under the current value; if the rated current of the driving motor is In, and when the input current of the driving motor is between 1.1 In and 1.2 In, the time taken for the temperature value of the winding of the driving motor to rise from the third set temperature value to the fourth set temperature value is T1, the maximum duration time of the driving motor is determined to be T2 when the input current of the driving motor is between 1.1 In and 1.2 In;
TABLE 1
(2) In the actual running process of the vehicle, three-phase input currents Ia, Ib and Ic of the driving motor are detected in real time through a current sensor, the effective value of each phase Is calculated, and the space phase current Is of the driving motor Is calculated through a vector transformation rule;
(3) finding out the maximum duration time tx of the motor controller when the output current of the motor controller Is in the motor controller overload characteristic table part of the drive motor overload characteristic table; finding out the maximum duration Tx of the driving motor when the input current of the driving motor Is in the driving motor overload characteristic table part of the driving motor overload characteristic table;
(4) judging the sizes of Tx and Tx, and if Tx is larger than Tx, taking Tx as the maximum duration threshold of the driving system; if Tx is less than Tx, then Tx is taken as the maximum duration threshold of the drive system;
calculating the duration time t of the driving motor under the working condition that the input current Is, if the duration time t Is greater than the maximum duration time threshold value of the driving system, sending an overload alarm of the driving system, simultaneously controlling the output current of the motor controller to be reduced, and clearing the value of t after the duration setting time; in the embodiment, the duration time t Is 3-5min, and after the overload alarm of the driving system Is sent out, the output current value of the motor controller Is reduced to 0.25 time of Is.
As another embodiment, when the maximum duration time when the output current of the motor controller is the current values and the maximum duration time when the input current of the driving motor is the current values are obtained through a bench test, the range of each interval may be adjusted according to the actual situation, and it is required that the difference between the maximum duration times corresponding to the current values in each interval is not greater than the set time threshold.
As another embodiment, when performing overload protection, the output current and the duration of the motor controller may be adjusted as needed, and it Is required to satisfy that in the overload protection, the output current of the motor controller Is lower than Is, and after the duration, the temperatures of the motor controller and the driving motor are both reduced to the corresponding set temperature values.
Claims (11)
1. An overload protection method for a driving system of an electric vehicle is characterized by comprising the following steps:
(1) detecting an actual current value actually input when the driving motor works and the accumulated time when the current actually input by the driving motor is the current value;
(2) determining the maximum duration when the output current of the motor controller is the actual current value and the maximum duration when the input current of the driving motor is the actual current value, and taking the smaller of the two as the maximum duration threshold when the working current of the driving system is the actual current value;
the maximum duration time when the output current of the motor controller is the actual current value is the time for a device on the motor controller to increase from a first set temperature value to a second set temperature value when the output current of the motor controller is the actual current value;
the maximum duration time when the input current of the driving motor is the actual current value is the time for the stator winding of the driving motor to rise from the third set temperature value to the fourth set temperature value when the input current of the driving motor is the actual current value;
(3) and judging whether the accumulated time is greater than a maximum duration threshold value, and if so, starting overload protection.
2. The overload protection method for the driving system of the electric vehicle as claimed in claim 1, wherein the current value larger than the rated current of the motor controller is divided into a set number of continuous current intervals;
when the output current of the motor controller is tested to be the current value in each current interval, the time for the temperature of a device on the motor controller to be increased from a first set temperature value to a second set temperature value is taken as the maximum duration time when the output current of the motor controller is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the output current of the motor controller is the actual current value.
3. The overload protection method for the driving system of the electric vehicle as claimed in claim 1, wherein the current value larger than the rated current of the driving motor is divided into a set number of continuous current intervals;
when the input current of the driving motor is tested to be the current value in each current interval, the time for increasing the temperature of a stator winding in the driving motor from a third set temperature value to a fourth set temperature value is taken as the maximum duration time when the input current of the driving motor is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the input current of the driving motor is the actual current value.
4. The overload protection method for the driving system of the electric vehicle according to claim 1, wherein the actual current value actually input when the driving motor operates is a space phase current value calculated by a vector transformation rule based on a three-phase current value actually input when the driving motor operates.
5. The overload protection method for the driving system of the electric vehicle as claimed in claim 1, wherein the starting of the overload protection is to reduce the output current of the motor controller to a set multiple of the actual current value within a set time period, and the set multiple is smaller than 1.
6. The overload protection device of the electric vehicle driving system is characterized by comprising a processor, wherein the processor is connected with a current detection device and is used for detecting the input current value of a driving motor;
the processor is provided with an overload protection module, and the overload protection module is used for:
detecting an actual current value actually input when the driving motor works and the accumulated time when the current actually input by the driving motor is the current value;
determining the maximum duration when the output current of the motor controller is the actual current value and the maximum duration when the input current of the driving motor is the actual current value, and taking the smaller of the two as the maximum duration threshold when the working current of the driving system is the actual current value;
the maximum duration time when the output current of the motor controller is the actual current value is the time for a device on the motor controller to increase from a first set temperature value to a second set temperature value when the output current of the motor controller is the actual current value;
the maximum duration time when the input current of the driving motor is the actual current value is the time for the stator winding of the driving motor to rise from the third set temperature value to the fourth set temperature value when the input current of the driving motor is the actual current value;
and judging whether the accumulated time is greater than a maximum duration threshold value, and if so, starting overload protection.
7. The overload protection device for the driving system of the electric vehicle as claimed in claim 6, wherein the current value larger than the rated current of the motor controller is divided into a set number of continuous current intervals;
when the output current of the motor controller is tested to be the current value in each current interval, the time for the temperature of a device on the motor controller to be increased from a first set temperature value to a second set temperature value is taken as the maximum duration time when the output current of the motor controller is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the output current of the motor controller is the actual current value.
8. The overload protection device for the driving system of the electric vehicle as claimed in claim 6, wherein the current value larger than the rated current of the driving motor is divided into a set number of continuous current intervals;
when the input current of the driving motor is tested to be the current value in each current interval, the time for increasing the temperature of a stator winding in the driving motor from a third set temperature value to a fourth set temperature value is taken as the maximum duration time when the input current of the driving motor is the current value in the corresponding current interval;
and judging the current interval where the actual current value is located, wherein the maximum duration corresponding to the current interval is the maximum duration when the input current of the driving motor is the actual current value.
9. The overload protection device for the driving system of the electric vehicle according to claim 6, wherein the actual current value actually input when the driving motor operates is a space phase current value calculated by a vector transformation rule based on a three-phase current value actually input when the driving motor operates.
10. The overload protection device for the driving system of the electric vehicle as claimed in claim 6, wherein the starting of the overload protection is to reduce the output current of the motor controller to a set multiple of the actual current value within a set time period, and the set multiple is smaller than 1.
11. The overload protection apparatus for an electric vehicle drive system according to claim 6, wherein the processor is integrated with the motor controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710877083.6A CN109560746B (en) | 2017-09-25 | 2017-09-25 | Overload protection method and device for electric vehicle driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710877083.6A CN109560746B (en) | 2017-09-25 | 2017-09-25 | Overload protection method and device for electric vehicle driving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109560746A CN109560746A (en) | 2019-04-02 |
| CN109560746B true CN109560746B (en) | 2020-09-01 |
Family
ID=65863131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710877083.6A Active CN109560746B (en) | 2017-09-25 | 2017-09-25 | Overload protection method and device for electric vehicle driving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109560746B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835323A (en) * | 2019-04-17 | 2020-10-27 | 联合汽车电子有限公司 | Internal drive ignition IGBT overload protection method and device |
| CN112953356B (en) * | 2019-12-11 | 2023-12-15 | 武汉杰开科技有限公司 | Method, system and readable storage medium based on motor locked rotor protection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205105139U (en) * | 2015-10-14 | 2016-03-23 | 国胜丰工具机股份有限公司 | Structure of motor overload protection device for drilling machine |
| CN106301130A (en) * | 2015-05-13 | 2017-01-04 | 北京和利时电机技术有限公司 | The control method of a kind of automatic load shedding of motor-driven dynamic overload and system |
| CN107124131A (en) * | 2017-06-08 | 2017-09-01 | 南京理工大学 | A kind of motor control method of new-energy automobile |
| CN107147349A (en) * | 2017-06-08 | 2017-09-08 | 南京理工大学 | A method for active thermal control of an induction motor |
| JP2017163774A (en) * | 2016-03-11 | 2017-09-14 | 日本精工株式会社 | Motor controller, and electric power steering device mounted with the same |
-
2017
- 2017-09-25 CN CN201710877083.6A patent/CN109560746B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301130A (en) * | 2015-05-13 | 2017-01-04 | 北京和利时电机技术有限公司 | The control method of a kind of automatic load shedding of motor-driven dynamic overload and system |
| CN205105139U (en) * | 2015-10-14 | 2016-03-23 | 国胜丰工具机股份有限公司 | Structure of motor overload protection device for drilling machine |
| JP2017163774A (en) * | 2016-03-11 | 2017-09-14 | 日本精工株式会社 | Motor controller, and electric power steering device mounted with the same |
| CN107124131A (en) * | 2017-06-08 | 2017-09-01 | 南京理工大学 | A kind of motor control method of new-energy automobile |
| CN107147349A (en) * | 2017-06-08 | 2017-09-08 | 南京理工大学 | A method for active thermal control of an induction motor |
Non-Patent Citations (1)
| Title |
|---|
| 11kW三相异步电动机故障保护装置的研究;孙磊;《中国优秀硕士学位论文全文数据库（工程科技Ⅱ辑）》;20151115(第11期);第C042-30页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109560746A (en) | 2019-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111572349B (en) | Electric vehicle locked-rotor fault detection method, device, equipment and storage medium | |
| EP3217539A1 (en) | Temperature monitoring device, temperature monitoring method, information processing program and recording medium | |
| EP2381573A1 (en) | Apparatus for protecting power supply circuit of three-phase inverter | |
| CN110356245B (en) | Motor over-temperature protection method and device | |
| CN103109460A (en) | Temperature protection device | |
| US8736234B2 (en) | Power converter control apparatus | |
| CN110265974B (en) | Temperature detection method and device | |
| US11043830B2 (en) | Vehicle and electric power control device for vehicle | |
| CN109067307B (en) | Temperature detection and protection method, system and device of motor drive circuit and motor protection system | |
| CN103424277A (en) | Diagnosis method for heat radiation system | |
| CN109560746B (en) | Overload protection method and device for electric vehicle driving system | |
| CN103944485A (en) | Protection method for over-temperature of permanent magnet motor in pure electric vehicle | |
| CN103166540A (en) | Protection processing method for brake resistor in alternating current servo driving system | |
| CN105141214A (en) | Method used by motor controller for treating bus voltage fault | |
| CN112208383B (en) | Method, system and device for controlling internal temperature of silicon carbide charging pile and application | |
| CN111865186A (en) | Fault detection method, motor control method and related equipment | |
| US9884559B2 (en) | Device and method for controlling a high side DC/DC converter of a hybrid vehicle | |
| EP3661049B1 (en) | Apparatus protection device and apparatus protection method | |
| CN111446696B (en) | Automobile motor protection method, device, equipment and storage medium | |
| CN112918273A (en) | Method for protecting power device for vehicle, motor control device, and storage medium | |
| CN107508515B (en) | Security control method and device for permanent magnet synchronous motor | |
| CN105406796A (en) | Variable-frequency compressor frequency control method, system and variable-frequency air conditioner | |
| CN206211901U (en) | Motor vehicle electric rotating machine and voltage regulator controller | |
| CN115764808A (en) | Locked-rotor protection method, device, equipment and storage medium for electric drive system | |
| CN208971121U (en) | Short circuit protective circuit of motor controller, motor control assembly and electric car |
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 | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |