CN113489424A

CN113489424A - Motor controller, control method and device thereof, storage medium and processor

Info

Publication number: CN113489424A
Application number: CN202110925257.8A
Authority: CN
Inventors: 牛高产; 陈建清; 周奇聪
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-10-08
Anticipated expiration: 2041-08-12
Also published as: CN113489424B

Abstract

The invention discloses a control method and a control device of a motor controller, the motor controller, a storage medium and a processor, wherein the method comprises the following steps: acquiring a first temperature value sampled by a first temperature sampling unit as a first temperature value of a first temperature line of the motor; acquiring a first temperature value sampled by a second temperature sampling unit as a second temperature value of a second temperature line of the motor; acquiring a third temperature value sampled by a third temperature sampling unit; and controlling the working states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value and the third temperature value of the second temperature line of the motor and the set temperature control strategy flag bit of the motor controller. According to the scheme, redundancy setting is carried out on the sampling of the motor temperature, and a winter control strategy is added, so that the working efficiency of a controller (such as a motor controller) can be improved.

Description

Motor controller, control method and device thereof, storage medium and processor

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a control method and device of a motor controller, the motor controller, a storage medium and a processor, in particular to a processing method and device for low-temperature work of a new energy automobile controller, the motor controller, the storage medium and the processor.

Background

The normal working conditions of the controller (such as a motor controller) and the motor are as follows: both operating temperatures are within a defined range. When the difference between the temperature of the controller (such as a motor controller) and the temperature of the motor is not in the limited difference range, the controller (such as the motor controller) enters a fault protection state, the motor limits the power torque, and the working efficiency of the controller (such as the motor controller) is influenced.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention aims to provide a control method and a control device of a motor controller, the motor controller, a storage medium and a processor, so as to solve the problems that when the difference value between the temperature of the controller (such as the motor controller) and the temperature of a motor is not in a limited difference value range, the controller (such as the motor controller) enters a fault protection state, the motor limits power torque, and the working efficiency of the controller (such as the motor controller) is influenced, and achieve the effects that the working efficiency of the controller (such as the motor controller) can be improved by performing redundancy setting on the sampling of the temperature of the motor and adding a winter control strategy.

The invention provides a control method of a motor controller, wherein a motor is provided with a first temperature sampling unit and a second temperature sampling unit; the motor controller is provided with a third temperature sampling unit; the control method of the motor controller comprises the following steps: acquiring a first temperature value sampled by the first temperature sampling unit, and taking the first temperature value as a first temperature value of a first temperature line of the motor; acquiring a first temperature value sampled by the second temperature sampling unit, and taking the first temperature value as a second temperature value of a second temperature line of the motor; acquiring a third temperature value sampled by the third temperature sampling unit; and controlling the working states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value and the set temperature control strategy flag bit of the motor controller.

In some embodiments, the first temperature sampling unit and the second temperature sampling unit both sample from an output voltage signal of a built-in voltage-dividing resistor of the motor to obtain a temperature value of a corresponding temperature line; and the third temperature sampling unit can sample the temperature from the IGBT module of the motor controller to obtain the temperature of the IGBT module of the motor controller.

In some embodiments, controlling the operating states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value, and the set temperature control strategy flag of the motor controller includes: in the first temperature line and the second temperature line, a second temperature value of the second temperature line is firstly used for judgment; under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line; and in the process of judging by using the first temperature value of the first temperature line, judging by combining a set temperature control strategy flag bit of the motor controller.

In some embodiments, the determining using the second temperature value of the second temperature line comprises: under the condition that the first temperature sampling unit and the second temperature sampling unit sample from the output voltage signal of the built-in voltage division resistor of the motor, determining whether a voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than a first set voltage or not, and determining whether a third temperature value is larger than a first set temperature or not; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the second temperature line is normal; under the condition that the second temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is greater than or equal to the first set voltage, and/or the third temperature value is less than or equal to the first set temperature, determining that the second temperature line has a fault; under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line; wherein, judge in combination with the temperature control strategy flag bit of setting of machine controller, include: and judging by using the third temperature value and a set temperature control strategy flag bit of the motor controller, or judging by using a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor and the set temperature control strategy flag bit of the motor controller.

In some embodiments, the determining using the third temperature value and a set temperature control strategy flag of the motor controller includes: determining whether the third temperature value is less than a second set temperature; if the third temperature value is less than the second set temperature, setting a set temperature control strategy flag bit of the motor controller; determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal; determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is detected; if the third temperature value is less than or equal to the second set temperature, clearing a set temperature control strategy flag bit of the motor controller; when the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the first temperature line has a fault, and under the condition that the first temperature line has a fault, determining that the motor and the motor controller have a working fault according to a set working mode; when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is larger than or equal to the first set voltage and/or the third temperature value is smaller than or equal to the first set temperature, determining that the first temperature line is normal, and when the first temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode; or, the determining using the voltage value corresponding to the output voltage signal of the built-in voltage-dividing resistor of the motor and the set temperature control strategy flag bit of the motor controller includes: determining whether a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than a second set voltage; the second set voltage is greater than the first set voltage; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the second set voltage, setting a set temperature control strategy flag bit of the motor controller; determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal; determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is detected; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is less than or equal to the second set voltage, resetting the set temperature control strategy flag bit of the motor controller; when the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the first temperature line has a fault, and under the condition that the first temperature line has a fault, determining that the motor and the motor controller have a working fault according to a set working mode; and determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal.

In accordance with the above method, another aspect of the present invention provides a control apparatus for a motor controller, wherein the motor has a first temperature sampling unit and a second temperature sampling unit; the motor controller is provided with a third temperature sampling unit; the control device of the motor controller comprises: an acquisition unit configured to acquire a first temperature value sampled by the first temperature sampling unit as a first temperature value of a first temperature line of the motor; acquiring a first temperature value sampled by the second temperature sampling unit, and taking the first temperature value as a second temperature value of a second temperature line of the motor; acquiring a third temperature value sampled by the third temperature sampling unit; the control unit is configured to control the working states of the motor and the motor controller according to a first temperature value of a first temperature line of the motor, a second temperature value of a second temperature line of the motor, the third temperature value and a set temperature control strategy flag bit of the motor controller.

In some embodiments, the controlling unit controls the operating states of the motor and the motor controller according to a first temperature value of a first temperature line of the motor, a second temperature value of a second temperature line of the motor, the third temperature value, and a set temperature control strategy flag of the motor controller, including: in the first temperature line and the second temperature line, a second temperature value of the second temperature line is firstly used for judgment; under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line; and in the process of judging by using the first temperature value of the first temperature line, judging by combining a set temperature control strategy flag bit of the motor controller.

In some embodiments, the determining, by the control unit, using the second temperature value of the second temperature line includes: under the condition that the first temperature sampling unit and the second temperature sampling unit sample from the output voltage signal of the built-in voltage division resistor of the motor, determining whether a voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than a first set voltage or not, and determining whether a third temperature value is larger than a first set temperature or not; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the second temperature line is normal; under the condition that the second temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is greater than or equal to the first set voltage, and/or the third temperature value is less than or equal to the first set temperature, determining that the second temperature line has a fault; under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line; wherein, judge in combination with the temperature control strategy flag bit of setting of machine controller, include: and judging by using the third temperature value and a set temperature control strategy flag bit of the motor controller, or judging by using a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor and the set temperature control strategy flag bit of the motor controller.

In some embodiments, the determining, by the control unit, using the third temperature value and a set temperature control strategy flag of the motor controller includes: determining whether the third temperature value is less than a second set temperature; if the third temperature value is less than the second set temperature, setting a set temperature control strategy flag bit of the motor controller; determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal; determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is detected; if the third temperature value is less than or equal to the second set temperature, clearing a set temperature control strategy flag bit of the motor controller; when the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the first temperature line has a fault, and under the condition that the first temperature line has a fault, determining that the motor and the motor controller have a working fault according to a set working mode; when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is larger than or equal to the first set voltage and/or the third temperature value is smaller than or equal to the first set temperature, determining that the first temperature line is normal, and when the first temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode; alternatively, the control unit, which performs determination using a voltage value corresponding to an output voltage signal of a built-in voltage-dividing resistor of the motor and a set temperature control strategy flag bit of the motor controller, includes: determining whether a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than a second set voltage; the second set voltage is greater than the first set voltage; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the second set voltage, setting a set temperature control strategy flag bit of the motor controller; determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal; determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is detected; if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is less than or equal to the second set voltage, resetting the set temperature control strategy flag bit of the motor controller; when the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the first temperature line has a fault, and under the condition that the first temperature line has a fault, determining that the motor and the motor controller have a working fault according to a set working mode; and determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal.

In accordance with another aspect of the present invention, there is provided a motor controller, including: the control device of the motor controller described above.

In accordance with the above method, a further aspect of the present invention provides a storage medium, which includes a stored program, wherein when the program runs, an apparatus in which the storage medium is located is controlled to execute the above control method of the motor controller.

In accordance with the above method, a further aspect of the present invention provides a processor for running a program, wherein the program is run to execute the above control method of the motor controller.

Therefore, according to the scheme of the invention, the selection of the environment temperature and the motor control strategy is realized by arranging two motor temperature sampling circuits and one controller (such as a motor controller) temperature sampling circuit, adding a winter control strategy and utilizing two motor temperature lines, one controller (such as a motor controller) temperature line and the winter control strategy; therefore, the working efficiency of the controller (such as a motor controller) can be improved by carrying out redundancy setting on the sampling of the motor temperature and adding a winter control strategy.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a control method of a motor controller according to the present invention;

FIG. 2 is a schematic flow chart illustrating an embodiment of determining by first using the second temperature value of the second temperature line in the method of the present invention;

fig. 3 is a schematic flowchart of an embodiment of determining by using the third temperature value and the set temperature control strategy flag of the motor controller in the method of the present invention;

fig. 4 is a schematic flowchart of an embodiment of the method of the present invention, in which a voltage value corresponding to an output voltage signal of a built-in voltage-dividing resistor of the motor and a flag bit of a set temperature control strategy of the motor controller are used for determination;

FIG. 5 is a schematic structural diagram of a control device of a motor controller according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an embodiment of a temperature sampling circuit of the motor;

fig. 7 is a schematic structural diagram of an embodiment of a temperature sampling circuit of an IGBT module;

fig. 8 is a schematic view of a determination process of an embodiment of a low-temperature operating condition of a new energy automobile controller.

The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:

102-an obtaining unit; 104-control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the south-north areas, the temperature difference in summer is not different, but the temperature difference in winter is overlarge. In northern areas, the temperature is lowest to minus 50 ℃ in winter, so that the temperature difference all the year around is too large, and when extremely cold weather occurs, the normal working temperature range of a controller (such as a motor controller) and a motor limited by a program cannot meet the requirements of summer and winter simultaneously.

According to an embodiment of the present invention, a control method of a motor controller is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The motor has a first temperature sampling unit and a second temperature sampling unit. The motor controller has a third temperature sampling unit. For example: the automobile, comprising: an electric motor. The motor is provided with a first temperature sampling unit and a second temperature sampling unit; the automobile controller includes: a motor controller; the motor controller has a third temperature sampling unit. The temperature sampling circuit comprises a first temperature sampling unit and a second temperature sampling unit, such as two motor temperature sampling circuits. And a third temperature sampling unit, such as a temperature sampling circuit of the IGBT module.

The control method of the motor controller comprises the following steps: step S110 and step S120.

In step S110, a first temperature value sampled by the first temperature sampling unit is obtained as a first temperature value of a first temperature line of the motor. And acquiring a first temperature value sampled by the second temperature sampling unit as a second temperature value of a second temperature line of the motor. And acquiring a third temperature value sampled by the third temperature sampling unit.

In some embodiments, the first temperature sampling unit and the second temperature sampling unit both sample from an output voltage signal of a built-in voltage-dividing resistor of the motor to obtain a temperature value of a corresponding temperature line.

Fig. 6 is a schematic structural diagram of an embodiment of a temperature sampling circuit of a motor. In the temperature sampling circuit of the motor shown in fig. 6, one temperature sampling circuit is added. When the program adopts the default motor temperature sampling circuit (namely the first temperature sampling circuit) to acquire the temperature line judgment result corresponding to the result, the judgment result is abandoned, and the program continues to adopt the result acquired by the second temperature sampling circuit to further judge the temperature line. Therefore, the possibility of hardware faults of the default motor temperature sampling circuit can be eliminated by adopting a redundancy design method, so that the reliability of the hardware motor temperature sampling circuit is ensured, and the accuracy of a judgment result is also ensured.

The first temperature sampling circuit and the second temperature sampling circuit can be identical in structure, and sampling positions can be identical when the motor temperature is sampled.

As shown in fig. 6, the two temperature sampling circuits have the same structure. Wherein, a temperature sampling circuit includes: the circuit comprises a capacitor C77, a capacitor C121, a capacitor C251, a common mode inductor L2, resistors R38, R39 and R301 and a clamping diode D9. The two ends of the capacitor C77 are connected to the output voltage signals (such as the MOTORT2+ end and the MOTORT 2-end) of the built-in voltage-dividing resistor of the motor. The two ends of the capacitor C77 are also connected to the 1 st pin and the 2 nd pin of the common mode inductor L2. The 3 rd pin of the common mode inductor L2 is connected to the +5VA.M power supply through the resistor R39. The 4 th pin of the common mode inductor L2 is grounded gnd.m through the resistor R38 and the capacitor C121 connected in parallel, and is grounded GND through the resistor R301 and the capacitor C251, and is further connected to the clamping diode D9. And the common end of the resistor R301 and the capacitor C251 serves as an output end M.TEM2 of the motor temperature sampling value. The cathode of the clamping diode D9 is grounded GND, and the cathode of the clamping diode D9 is connected with a DC power supply +3.3 VA.

Another temperature sampling circuit, comprising: the circuit comprises a capacitor C90, a capacitor C155, a capacitor C85, a common mode inductor L1, resistors R225, R226 and R36 and a clamping diode D15. The two ends of the capacitor C90 are connected to the output voltage signals (such as the MOTORT1+ end and the MOTORT 1-end) of the built-in voltage-dividing resistor of the motor. The two ends of the capacitor C90 are also connected to the 1 st pin and the 2 nd pin of the common mode inductor L1. The 3 rd pin of the common mode inductor L1 is connected to the +5VA.M power supply through the resistor R226. The 4 th pin of the common mode inductor L1 is grounded gnd.m through the resistor R225 and the capacitor C155 connected in parallel, and is grounded GND through the resistor R36 and the capacitor C85, and is further connected to the clamping diode D15. And the common end of the resistor R36 and the capacitor C85 serves as an output end M.TEM1 of the motor temperature sampling value. The cathode of the clamping diode D15 is grounded GND, and the cathode of the clamping diode D15 is connected with a DC power supply +3.3 VA.

The third temperature sampling unit can sample the temperature from the IGBT module of the motor controller to obtain the IGBT module temperature of the motor controller, such as the IGBT module temperature temp.

Fig. 7 is a schematic structural diagram of an embodiment of a temperature sampling circuit of an IGBT module. The temperature sampling circuit of the IGBT module shown in fig. 7 is a circuit diagram of a new energy automobile controller (e.g., a motor controller) sampling a natural temperature in a current environment, and is used as one of conditions for judging whether the controller (e.g., the motor controller) can normally operate.

As shown in fig. 7, the temperature sampling circuit of the IGBT module includes: the circuit comprises a capacitor C56, a capacitor C66, a capacitor C72, a resistor R25, a resistor R47, a resistor R50 and a clamping diode D12. One end of the capacitor C56 is connected with a temperature sampling end TEM _ V end of a controller (such as a motor controller), and the other end of the capacitor C56 is grounded. The capacitor C56, the capacitor C66, and the resistor R47 and the resistor 25 which are connected in series are connected in parallel. The common end of the resistor R47 and the resistor 25 is grounded GND after passing through the capacitor C72 after passing through the resistor R50, and is connected to the clamping diode D12, and an output end V.DSP.TEM1 of a temperature sampling value of a controller (such as a motor controller) is output.

In the solution of the invention, in the normal operation mode, the approach of the controller (e.g. motor controller) temperature to the motor temperature allows a range of differences. In order to ensure the reliability of the controller (e.g., a motor controller) and the motor during the design, the controller (e.g., the motor controller) and the motor need to be subjected to temperature acquisition and difference calculation and judgment respectively, and a design method of a motor temperature sampling circuit and an IGBT module temperature sampling circuit is used, which is specifically referred to as the example shown in fig. 6 and 7.

In step S120, the operating states of the motor and the motor controller are controlled according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value, and the set temperature control strategy flag bit of the motor controller, so as to control the operating state of the vehicle controller. The operating state refers to a state of normal operation or a state of a fault shutdown.

The problem that the power torque of the motor is limited due to the fact that the controller (such as a motor controller) triggers low-temperature protection due to the fact that the difference between the temperature of the controller (such as the motor controller) and the temperature of the motor is large under the condition of low air temperature of the new energy automobile is considered. The scheme of the invention provides a processing method based on low-temperature work of a new energy automobile controller (such as a motor controller). hardware adopts a redundancy design method, and motor temperature sampling circuits are added from 1 to 2. And the program increases a winter control judgment flag bit. The judgment of the temperature line is more accurate when the controller (such as a motor controller) and the motor work normally, and the control strategy of the controller (such as the motor controller) is automatically switched to the winter control strategy in winter, so that the judgment accuracy of the temperature line in summer is ensured, and the judgment condition of the working temperature line in winter is met.

Therefore, the method adopting the winter control strategy can ensure the original temperature detection accuracy of the controller (such as a motor controller) under the normal temperature condition and ensure the working temperature detection accuracy of the controller (such as the motor controller). The limited working temperature range is properly released under the condition of lower air temperature, the working capacity of the controller (such as a motor controller) under different temperature environments is realized, the operable temperature range of the controller (such as the motor controller) is expanded, the utilization efficiency of the controller (such as the motor controller) is improved, the condition that the temperature is too low to cause low-temperature protection of the controller (such as the motor controller) to limit the work of the controller (such as the motor controller) is prevented, and the working safety of the controller (such as the motor controller) is improved.

In some embodiments, the controlling the operating states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value, and the set temperature control strategy flag of the motor controller in step S120 includes: and in the first temperature line and the second temperature line, firstly, judging by using a second temperature value of the second temperature line. And under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line.

And in the process of judging by using the first temperature value of the first temperature line, judging by combining a set temperature control strategy flag bit of the motor controller.

The temperature of the motor is sampled by an output voltage signal of a voltage dividing resistor built in the motor (as shown in the example of fig. 6), and the temperature of a controller (such as a motor controller) is sampled by an IGBT module temperature sampling circuit (as shown in the example of fig. 7). The temperature of the motor is always in inverse proportion to the value of the built-in voltage-dividing resistor. The built-in voltage-dividing resistor of the motor is 10K. In order to ensure the reliability and safety of the motor and the controller (such as a motor controller), a redundancy design method is adopted, namely two groups of judgment motor temperature lines are adopted, and a second temperature line is used by default. When the second temperature line has a fault, the first temperature line is used for judging the temperature difference. When the difference between the temperature of the controller (such as a motor controller) and the temperature of the motor exceeds a limit value, the controller (such as the motor controller) enters a fault protection mode to limit the power torque of the motor.

And obtaining the condition of the judged temperature line according to the temperature detection value.

When the motor acquires the output voltage value V of the built-in voltage-dividing resistor is less than 0.056 and the temperature temp of the IGBT module is greater than 25, the low-temperature fault flag bit of the second temperature line is set, and then the temperature line of the motor is judged by using the first temperature line. The voltage value V is a motor temperature value obtained by conversion calculation. The first temperature line and the second temperature line are sampled based on the voltage value V.

In some embodiments, with reference to the schematic flow chart of an embodiment of the method of the present invention shown in fig. 2, in which the second temperature value of the second temperature line is first used for determining, a specific process of determining by using the second temperature value of the second temperature line is further described, including: step S210 to step S230.

Step S210, determining whether a voltage value corresponding to an output voltage signal of a built-in voltage-dividing resistor of the motor is less than a first set voltage and determining whether the third temperature value is greater than a first set temperature, when the first temperature sampling unit and the second temperature sampling unit both sample from the output voltage signal of the built-in voltage-dividing resistor of the motor.

Step S220, if the voltage value corresponding to the output voltage signal of the built-in voltage-dividing resistor of the motor is smaller than the first set voltage, and the third temperature value is greater than the first set temperature, it is determined that the second temperature line is normal. And under the condition that the second temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode.

Step S230, if a voltage value corresponding to an output voltage signal of a built-in voltage-dividing resistor of the motor is greater than or equal to the first set voltage, and/or the third temperature value is less than or equal to the first set temperature, determining that the second temperature line is faulty. And under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line.

Wherein, in the process of judging by using the first temperature value of the first temperature line, the judgment is carried out by combining the set temperature control strategy flag bit of the motor controller, and the method comprises the following steps: in the process of judging by using the first temperature value of the first temperature line, the third temperature value and the set temperature control strategy flag bit of the motor controller are used for judging, or in the case that the first temperature sampling unit and the second temperature sampling unit sample from the output voltage signal of the built-in voltage division resistor of the motor, the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor and the set temperature control strategy flag bit of the motor controller are used for judging.

In the scheme of the invention, a winter control strategy judgment is added to a first temperature line judgment logic, when the temperature sampling value temp of the IGBT module is less than 0, a winter control strategy flag bit (bFlagwinter) is set, a controller (such as a motor controller) selects to enter the winter control strategy, the first temperature line does not carry out low-temperature judgment on the temperature difference between the motor and the controller (such as the motor controller), and the state of the first temperature line is normal. And processing according to the judged temperature line condition, wherein when the second temperature line state is normal, the motor and the controller (such as a motor controller) work normally. When the second temperature line is in fault and the first temperature line is normal, the first temperature line is selected for temperature difference judgment, namely the first temperature line has no fault mark, at the moment, the low-temperature working temperature range value is amplified, and a controller (such as a motor controller) and a motor can normally work under the low-temperature condition. When the second temperature line fails and the first temperature line fails, the controller (such as a motor controller) limits the power torque of the motor, and the controller (such as the motor controller) and the motor can not work normally.

In some embodiments, referring to a flowchart of an example of the method of the present invention shown in fig. 3, where the third temperature value and the set temperature control strategy flag bit of the motor controller are used for determining, a specific process of determining using the third temperature value and the set temperature control strategy flag bit of the motor controller is further described, where the specific process includes: step S310 to step S330.

Step S310, determining whether the third temperature value is less than a second set temperature.

And step S320, if the third temperature value is less than the second set temperature, setting a set temperature control strategy flag bit of the motor controller. And determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal. And determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is.

And step S330, if the third temperature value is less than or equal to the second set temperature, clearing a set temperature control strategy flag bit of the motor controller. And determining that the first temperature line is failed when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is greater than the first set temperature, and determining that the motor and the motor controller are failed according to a set working mode under the condition that the first temperature line is failed. And determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal.

Fig. 8 is a schematic view of a determination process of an embodiment of a low-temperature operating condition of a new energy automobile controller. The discrimination flow chart of the low-temperature operation of the new energy automobile controller (such as a motor controller) is shown in fig. 8. As shown in fig. 8, the process for determining the low-temperature working condition of the new energy automobile controller includes:

step 1, collecting voltage V of a motor divider resistor and collecting temperature temp of an IGBT module.

And 2, judging whether the output voltage value V of the built-in voltage-dividing resistor acquired by the motor is smaller than a first set voltage such as 0.056 and whether the temperature temp of the IGBT module is greater than a first set temperature such as 25.

If yes, determining that the second temperature line is in fault, and executing the step 3.

Otherwise, determining that the second temperature line is normal, determining that the motor and the controller work normally, and finishing the judgment of the low-temperature working condition of the new energy automobile controller at present.

Wherein the first temperature line and the second temperature line are two variables defined in the program for storing the results of the above two sets of logical judgments. The first temperature line and the second temperature line respectively correspond to the first motor temperature sampling circuit and the second motor temperature sampling circuit, the first motor temperature sampling circuit and the second motor temperature sampling circuit sample a voltage dividing resistor (the same resistor) built in the motor, and the voltage dividing resistor and the same resistor are converted according to sampled voltage values to obtain the motor temperature. The first temperature line corresponds to the first motor temperature sampling circuit and the IGBT module temperature temp. The second temperature line corresponds to the temperature temp of the second motor sampling circuit and the IGBT module temp. Whether the temperature line is normal or not is related to whether the motor temperature and the IGBT module temperature temp are normal or not.

Whether the temperature line is normal or not is related to whether the controller and the motor can work normally or not. If the judgment results of the two temperature lines are faults, the fault between the controller and the motor is indicated, and the motor and the controller cannot work at the moment, so that the automobile is applied to the automobile, and the automobile fails to run normally.

And 3, under the condition that the second temperature line has a fault, judging whether the temperature temp of the IGBT module is less than a second set temperature, such as 0.

If yes, setting a winter control strategy flag bit (bFlagWindow) and executing the step 4.

Otherwise, the winter control strategy flag bit (bFlagWinter) is cleared, and step 5 is executed.

And 4, judging whether the flag bit (bFlagWindow) of the winter control strategy is equal to 1.

If so, determining that the first temperature line is normal, determining that the motor and the controller work normally, and finishing the judgment of the low-temperature working condition of the new energy automobile controller at present.

Otherwise, determining the fault of the first temperature line, determining the fault of the motor and the control work, and finishing the judgment of the low-temperature work condition of the new energy automobile controller at present.

And 5, judging whether the output voltage value V of the built-in voltage-dividing resistor collected by the motor is smaller than a first set voltage such as 0.056 and whether the temperature temp of the IGBT module is greater than a first set temperature such as 25 again.

If so, determining the fault of the first temperature line, determining the fault of the motor and the control work, and finishing the judgment of the low-temperature work condition of the new energy automobile controller at present.

Otherwise, determining that the first temperature line is normal, determining that the motor and the controller work normally, and finishing the judgment of the low-temperature working condition of the new energy automobile controller at present.

In some embodiments, referring to a flowchart of an embodiment of the method shown in fig. 4, in which the voltage value corresponding to the output voltage signal of the built-in voltage dividing resistor of the motor and the set temperature control strategy flag bit of the motor controller are used for determining, a specific process of determining by using the voltage value corresponding to the output voltage signal of the built-in voltage dividing resistor of the motor and the set temperature control strategy flag bit of the motor controller is further described, where the specific process includes: step S410 to step S430.

Step S410, determining whether a voltage value corresponding to an output voltage signal of a built-in voltage-dividing resistor of the motor is less than a second set voltage. The second setting voltage is greater than the first setting voltage.

Step S420, if the voltage value corresponding to the output voltage signal of the built-in voltage-dividing resistor of the motor is smaller than the second set voltage, setting a set temperature control strategy flag bit of the motor controller. And determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal. And determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is.

And step S430, if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is less than or equal to the second set voltage, clearing the set temperature control strategy flag bit of the motor controller. And determining that the first temperature line is failed when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is greater than the first set temperature, and determining that the motor and the motor controller are failed according to a set working mode under the condition that the first temperature line is failed. And determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal.

Specifically, referring to the example shown in fig. 8, in step 3, if the winter control strategy prejudgment is performed without using whether the IGBT module temperature sampling value temp is less than 0, the winter control strategy prejudgment may be performed instead according to whether the motor voltage-dividing resistor voltage V is less than the second set voltage, e.g., 0.13, i.e., the motor temperature is zero. The second setting voltage is greater than the first setting voltage.

In the scheme of the invention, a winter control strategy is newly added, a winter control strategy flag bit (bFlagwinter) is adopted to prejudge whether the current air temperature is winter, the environment temperature detection and control strategy accurate selection of a new energy automobile controller (such as a motor controller) are realized, the low-temperature working capacity of the new energy automobile controller (such as the motor controller) is improved, the operable temperature range of the controller (such as the motor controller) is expanded, and the utilization efficiency of the controller (such as the motor controller) is improved. Therefore, the problem that a low-temperature fault is easily reported by a section controller (such as a motor controller) in winter in northern areas and the section controller enters a low-temperature protection state is solved, and the problem that the power torque is limited by the low-temperature fault of the motor in winter in northern areas is solved.

Through a large number of tests, the technical scheme of the embodiment is adopted, two motor temperature sampling circuits and one controller (such as a motor controller) temperature sampling circuit are arranged, a winter control strategy is added, and the selection of the environment temperature and the motor control strategy is realized by utilizing two motor temperature lines, one controller (such as the motor controller) temperature line and the winter control strategy. Therefore, the working efficiency of the controller (such as a motor controller) can be improved by carrying out redundancy setting on the sampling of the motor temperature and adding a winter control strategy.

According to an embodiment of the present invention, there is also provided a control apparatus of a motor controller corresponding to the control method of the motor controller. Referring to fig. 5, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The motor has a first temperature sampling unit and a second temperature sampling unit. The motor controller has a third temperature sampling unit. For example: the automobile, comprising: an electric motor. The motor is provided with a first temperature sampling unit and a second temperature sampling unit; the automobile controller includes: a motor controller; the motor controller has a third temperature sampling unit. The temperature sampling circuit comprises a first temperature sampling unit and a second temperature sampling unit, such as two motor temperature sampling circuits. And a third temperature sampling unit, such as a temperature sampling circuit of the IGBT module.

The control device of the motor controller comprises: an acquisition unit 102 and a control unit 104.

Wherein the obtaining unit 102 is configured to obtain the first temperature value sampled by the first temperature sampling unit as the first temperature value of the first temperature line of the motor. And acquiring a first temperature value sampled by the second temperature sampling unit as a second temperature value of a second temperature line of the motor. And acquiring a third temperature value sampled by the third temperature sampling unit. The specific functions and processes of the acquiring unit 102 are referred to in step S110.

Fig. 6 is a schematic structural diagram of an embodiment of a temperature sampling circuit of a motor. In the temperature sampling circuit of the motor shown in fig. 6, one temperature sampling circuit is added. When the program adopts the default motor temperature sampling circuit (namely the first temperature sampling circuit) to acquire the temperature line judgment result corresponding to the result, the judgment result is abandoned, and the program continues to adopt the result acquired by the second temperature sampling circuit to further judge the temperature line. Therefore, the redundant design device is adopted, the possibility of hardware faults of the default adopted motor temperature sampling circuit can be eliminated, the reliability of the hardware motor temperature sampling circuit is ensured, and the accuracy of the judgment result is also ensured.

Another temperature sampling circuit, comprising: the circuit comprises a capacitor C90, a capacitor C155, a capacitor C85, a common mode inductor L2, resistors R225, R226 and R36 and a clamping diode D15. The two ends of the capacitor C90 are connected to the output voltage signals (such as the MOTORT1+ end and the MOTORT 1-end) of the built-in voltage-dividing resistor of the motor. The two ends of the capacitor C90 are also connected to the 1 st pin and the 2 nd pin of the common mode inductor L1. The 3 rd pin of the common mode inductor L1 is connected to the +5VA.M power supply through the resistor R226. The 4 th pin of the common mode inductor L1 is grounded gnd.m through the resistor R225 and the capacitor C155 connected in parallel, and is grounded GND through the resistor R36 and the capacitor C85, and is further connected to the clamping diode D15. And the common end of the resistor R36 and the capacitor C85 serves as an output end M.TEM1 of the motor temperature sampling value. The cathode of the clamping diode D15 is grounded GND, and the cathode of the clamping diode D15 is connected with a DC power supply +3.3 VA.

In the solution of the invention, in the normal operation mode, the approach of the controller (e.g. motor controller) temperature to the motor temperature allows a range of differences. In order to ensure the reliability of the controller (e.g., a motor controller) and the motor during the design, the controller (e.g., the motor controller) and the motor need to be subjected to temperature acquisition and difference calculation and judgment, and a design apparatus using a motor temperature sampling circuit and an IGBT module temperature sampling circuit is used, which is specifically referred to as the example shown in fig. 6 and 7.

The control unit 104 is configured to control the operating states of the motor and the motor controller according to a first temperature value of a first temperature line of the motor, a second temperature value of a second temperature line of the motor, the third temperature value, and a set temperature control strategy flag bit of the motor controller, so as to control the operating state of the automobile controller. The operating state refers to a state of normal operation or a state of a fault shutdown. The specific function and processing of the control unit 104 are referred to in step S120.

The problem that the power torque of the motor is limited due to the fact that the controller (such as a motor controller) triggers low-temperature protection due to the fact that the difference between the temperature of the controller (such as the motor controller) and the temperature of the motor is large under the condition of low air temperature of the new energy automobile is considered. The invention provides a processing device based on low-temperature work of a new energy automobile controller (such as a motor controller). hardware adopts a redundancy design device, and motor temperature sampling circuits are added from 1 to 2. And the program increases a winter control judgment flag bit. The judgment of the temperature line is more accurate when the controller (such as a motor controller) and the motor work normally, and the control strategy of the controller (such as the motor controller) is automatically switched to the winter control strategy in winter, so that the judgment accuracy of the temperature line in summer is ensured, and the judgment condition of the working temperature line in winter is met.

Therefore, the device adopting the winter control strategy can ensure the original temperature detection accuracy of the controller (such as a motor controller) under the normal temperature condition and ensure the working temperature detection accuracy of the controller (such as the motor controller). The limited working temperature range is properly released under the condition of lower air temperature, the working capacity of the controller (such as a motor controller) under different temperature environments is realized, the operable temperature range of the controller (such as the motor controller) is expanded, the utilization efficiency of the controller (such as the motor controller) is improved, the condition that the temperature is too low to cause low-temperature protection of the controller (such as the motor controller) to limit the work of the controller (such as the motor controller) is prevented, and the working safety of the controller (such as the motor controller) is improved.

In some embodiments, the controlling unit 104 controls the operating states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value, and the set temperature control strategy flag bit of the motor controller, including: the control unit 104 is specifically further configured to perform a determination by using a second temperature value of the second temperature line in the first temperature line and the second temperature line. And under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line.

The temperature of the motor is sampled by an output voltage signal of a voltage dividing resistor built in the motor (as shown in the example of fig. 6), and the temperature of a controller (such as a motor controller) is sampled by an IGBT module temperature sampling circuit (as shown in the example of fig. 7). The temperature of the motor is always in inverse proportion to the value of the built-in voltage-dividing resistor. The built-in voltage-dividing resistor of the motor is 10K. In order to ensure the reliability and safety of the operation of the motor and a controller (such as a motor controller), a redundancy design device is adopted, namely two groups of judgment motor temperature lines are adopted, and a second temperature line is used by default. When the second temperature line has a fault, the first temperature line is used for judging the temperature difference. When the difference between the temperature of the controller (such as a motor controller) and the temperature of the motor exceeds a limit value, the controller (such as the motor controller) enters a fault protection mode to limit the power torque of the motor.

When the motor acquires the output voltage value V of the built-in voltage-dividing resistor is less than 0.056 and the temperature temp of the IGBT module is greater than 25, the low-temperature fault flag bit of the second temperature line is set, and then the temperature line of the motor is judged by using the first temperature line.

In some embodiments, the determining, by the control unit 104, using the second temperature value of the second temperature line includes:

the control unit 104 is specifically further configured to determine whether a voltage value corresponding to the output voltage signal of the internal voltage-dividing resistor of the motor is smaller than a first set voltage and determine whether the third temperature value is greater than a first set temperature, when the first temperature sampling unit and the second temperature sampling unit both sample from the output voltage signal of the internal voltage-dividing resistor of the motor. The specific functions and processes of the control unit 104 are also referred to in step S210.

The control unit 104 is specifically configured to determine that the second temperature line is normal if a voltage value corresponding to an output voltage signal of a built-in voltage-dividing resistor of the motor is less than the first set voltage and the third temperature value is greater than the first set temperature. And under the condition that the second temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode. The specific functions and processes of the control unit 104 are also referred to in step S220.

The control unit 104 is specifically further configured to determine that the second temperature line is faulty if a voltage value corresponding to an output voltage signal of the built-in voltage-dividing resistor of the motor is greater than or equal to the first set voltage, and/or the third temperature value is less than or equal to the first set temperature. And under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line. The specific function and processing of the control unit 104 are also referred to in step S230.

In some embodiments, the determining, by the control unit 104, using the third temperature value and a set temperature control strategy flag of the motor controller includes:

the control unit 104 is specifically further configured to determine whether the third temperature value is smaller than a second set temperature. The specific functions and processes of the control unit 104 are also referred to in step S310.

The control unit 104 is specifically further configured to set a set temperature control strategy flag bit of the motor controller if the third temperature value is less than the second set temperature. And determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal. And determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is. The specific functions and processes of the control unit 104 are also referred to in step S320.

The control unit 104 is specifically further configured to clear a set temperature control strategy flag of the motor controller if the third temperature value is less than or equal to the second set temperature. And determining that the first temperature line is failed when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is greater than the first set temperature, and determining that the motor and the motor controller are failed according to a set working mode under the condition that the first temperature line is failed. And determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal. The specific functions and processes of the control unit 104 are also referred to in step S330.

In some embodiments, the determining by the control unit 104 using the voltage value corresponding to the output voltage signal of the built-in voltage-dividing resistor of the motor and the set temperature control strategy flag bit of the motor controller includes:

the control unit 104 is specifically further configured to determine whether a voltage value corresponding to an output voltage signal of the built-in voltage dividing resistor of the motor is smaller than a second set voltage. The second setting voltage is greater than the first setting voltage. The specific functions and processes of the control unit 104 are also referred to in step S410.

The control unit 104 is further specifically configured to set a set temperature control strategy flag bit of the motor controller if a voltage value corresponding to an output voltage signal of the built-in voltage-dividing resistor of the motor is smaller than the second set voltage. And determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal. And determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is. The specific function and processing of the control unit 104 are also referred to in step S420.

The control unit 104 is specifically further configured to clear the set temperature control strategy flag bit of the motor controller if the voltage value corresponding to the output voltage signal of the built-in voltage-dividing resistor of the motor is smaller than or equal to the second set voltage. And determining that the first temperature line is failed when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is greater than the first set temperature, and determining that the motor and the motor controller are failed according to a set working mode under the condition that the first temperature line is failed. And determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal. The specific functions and processes of the control unit 104 are also referred to in step S430.

Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method, reference may be made to the related descriptions in the embodiments without being detailed in the description of this embodiment, which is not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, two motor temperature sampling circuits and one controller (such as a motor controller) temperature sampling circuit are arranged, a winter control strategy is added, and two motor temperature lines, one controller (such as a motor controller) temperature line and the winter control strategy are utilized to realize the selection of the environment temperature and the motor control strategy, so that the low-temperature working capacity of a new energy automobile controller (such as a motor controller) can be improved, the working temperature range of the controller (such as a motor controller) is expanded, and the utilization efficiency of the controller (such as a motor controller) is improved.

According to an embodiment of the present invention, there is also provided a motor controller corresponding to the control device of the motor controller. The motor controller may include: the control device of the motor controller described above.

Since the processes and functions implemented by the motor controller of this embodiment substantially correspond to the embodiments, principles, and examples of the foregoing devices, the descriptions of this embodiment are omitted for brevity, and refer to the related descriptions in the foregoing embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, two motor temperature sampling circuits and one controller (such as a motor controller) temperature sampling circuit are arranged, a winter control strategy is added, and two motor temperature lines, one controller (such as a motor controller) temperature line and the winter control strategy are utilized to realize the selection of the environmental temperature and the motor control strategy, so that the problems that the controller (such as the motor controller) is easy to report low-temperature faults and enters a low-temperature protection state in winter in the northern area can be solved, and the problems that the motor low-temperature faults and the limited power torque are caused in winter in the northern area are solved.

According to an embodiment of the present invention, there is also provided a storage medium corresponding to a control method of a motor controller, the storage medium including a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the control method of the motor controller described above when the program is executed.

Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the foregoing method, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.

Through a large number of tests, the technical scheme of the invention is adopted, two motor temperature sampling circuits and one controller (such as a motor controller) temperature sampling circuit are arranged, a winter control strategy is added, and two motor temperature lines, one controller (such as a motor controller) temperature line and the winter control strategy are utilized to realize the selection of the environment temperature and the motor control strategy, so that the possibility of hardware faults of the default adopted motor temperature sampling circuit can be eliminated, the reliability of the hardware motor temperature sampling circuit is ensured, and the accuracy of a judgment result is also ensured.

According to an embodiment of the present invention, there is also provided a processor corresponding to a control method of a motor controller, the processor being configured to run a program, wherein the program is configured to execute the control method of the motor controller described above when running.

Since the processing and functions implemented by the processor of this embodiment substantially correspond to the embodiments, principles, and examples of the foregoing method, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.

Through a large number of tests, the technical scheme of the invention is adopted, two motor temperature sampling circuits and one controller (such as a motor controller) temperature sampling circuit are arranged, a winter control strategy is added, and two motor temperature lines, one controller (such as a motor controller) temperature line and the winter control strategy are utilized to realize the selection of the environmental temperature and the motor control strategy, so that the utilization efficiency of the controller (such as the motor controller) can be improved, and the controller (such as the motor controller) is prevented from being limited to work due to low-temperature protection of the controller (such as the motor controller) caused by low temperature.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The control method of the motor controller is characterized in that the motor is provided with a first temperature sampling unit and a second temperature sampling unit; the motor controller is provided with a third temperature sampling unit;

the control method of the motor controller comprises the following steps:

acquiring a first temperature value sampled by the first temperature sampling unit, and taking the first temperature value as a first temperature value of a first temperature line of the motor; acquiring a first temperature value sampled by the second temperature sampling unit, and taking the first temperature value as a second temperature value of a second temperature line of the motor; acquiring a third temperature value sampled by the third temperature sampling unit;

and controlling the working states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value and the set temperature control strategy flag bit of the motor controller.

2. The control method of the motor controller according to claim 1, wherein the first temperature sampling unit and the second temperature sampling unit sample an output voltage signal of a built-in voltage dividing resistor of the motor to obtain a temperature value of a corresponding temperature line;

and the third temperature sampling unit can sample the temperature from the IGBT module of the motor controller to obtain the temperature of the IGBT module of the motor controller.

3. The method according to claim 1 or 2, wherein controlling the operating states of the motor and the motor controller according to the first temperature value of the first temperature line of the motor, the second temperature value of the second temperature line of the motor, the third temperature value, and the set temperature control strategy flag bit of the motor controller comprises:

in the first temperature line and the second temperature line, a second temperature value of the second temperature line is firstly used for judgment; under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line;

4. The method of claim 3, wherein determining using the second temperature value of the second temperature line comprises:

under the condition that the first temperature sampling unit and the second temperature sampling unit sample from the output voltage signal of the built-in voltage division resistor of the motor, determining whether a voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than a first set voltage or not, and determining whether a third temperature value is larger than a first set temperature or not;

if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the second temperature line is normal; under the condition that the second temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode;

if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is greater than or equal to the first set voltage, and/or the third temperature value is less than or equal to the first set temperature, determining that the second temperature line has a fault; under the condition that the second temperature line has a fault, judging by using the first temperature value of the first temperature line;

wherein, judge in combination with the temperature control strategy flag bit of setting of machine controller, include: and judging by using the third temperature value and a set temperature control strategy flag bit of the motor controller, or judging by using a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor and the set temperature control strategy flag bit of the motor controller.

5. The control method of a motor controller according to claim 4, wherein,

using the third temperature value and a set temperature control strategy flag bit of the motor controller for judgment, comprising:

determining whether the third temperature value is less than a second set temperature;

if the third temperature value is less than the second set temperature, setting a set temperature control strategy flag bit of the motor controller; determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal; determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is detected;

if the third temperature value is less than or equal to the second set temperature, clearing a set temperature control strategy flag bit of the motor controller; when the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the first temperature line has a fault, and under the condition that the first temperature line has a fault, determining that the motor and the motor controller have a working fault according to a set working mode; when a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is larger than or equal to the first set voltage and/or the third temperature value is smaller than or equal to the first set temperature, determining that the first temperature line is normal, and when the first temperature line is normal, determining that the motor and the motor controller work normally according to a set working mode;

alternatively, the first and second electrodes may be,

the method for judging by using the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor and the set temperature control strategy flag bit of the motor controller comprises the following steps:

determining whether a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is smaller than a second set voltage; the second set voltage is greater than the first set voltage;

if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the second set voltage, setting a set temperature control strategy flag bit of the motor controller; determining that the first temperature line is normal under the condition that a set temperature control strategy flag bit of the motor controller is 1, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal; determining the first temperature line fault under the condition that a set temperature control strategy flag bit of the motor controller is 0, and determining the working faults of the motor and the motor controller according to a set working mode under the condition that the first temperature line fault is detected;

if the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is less than or equal to the second set voltage, resetting the set temperature control strategy flag bit of the motor controller; when the voltage value corresponding to the output voltage signal of the built-in voltage division resistor of the motor is smaller than the first set voltage and the third temperature value is larger than the first set temperature, determining that the first temperature line has a fault, and under the condition that the first temperature line has a fault, determining that the motor and the motor controller have a working fault according to a set working mode; and determining that the first temperature line is normal under the condition that a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor is greater than or equal to the first set voltage and/or the third temperature value is less than or equal to the first set temperature, and determining that the motor and the motor controller work normally according to a set working mode under the condition that the first temperature line is normal.

6. The control device of the motor controller is characterized in that the motor is provided with a first temperature sampling unit and a second temperature sampling unit; the motor controller is provided with a third temperature sampling unit;

the control device of the motor controller comprises:

an acquisition unit configured to acquire a first temperature value sampled by the first temperature sampling unit as a first temperature value of a first temperature line of the motor; acquiring a first temperature value sampled by the second temperature sampling unit, and taking the first temperature value as a second temperature value of a second temperature line of the motor; acquiring a third temperature value sampled by the third temperature sampling unit;

the control unit is configured to control the working states of the motor and the motor controller according to a first temperature value of a first temperature line of the motor, a second temperature value of a second temperature line of the motor, the third temperature value and a set temperature control strategy flag bit of the motor controller.

7. The control device of the motor controller according to claim 6, wherein the first temperature sampling unit and the second temperature sampling unit sample an output voltage signal of a built-in voltage dividing resistor of the motor to obtain a temperature value of a corresponding temperature line;

8. The apparatus according to claim 6 or 7, wherein the control unit controls the operating states of the motor and the motor controller according to a first temperature value of a first temperature line of the motor, a second temperature value of a second temperature line of the motor, the third temperature value, and a set temperature control strategy flag of the motor controller, and includes:

9. The control device of a motor controller according to claim 8, wherein the control unit performs determination using the second temperature value of the second temperature line, and includes:

10. The control device of a motor controller according to claim 9, wherein,

the control unit, use the third temperature value and the temperature control strategy flag bit of setting of the motor controller to judge, include:

alternatively, the first and second electrodes may be,

the control unit judges by using a voltage value corresponding to an output voltage signal of a built-in voltage division resistor of the motor and a set temperature control strategy flag bit of the motor controller, and includes:

11. A motor controller, comprising: the control device of a motor controller according to any one of claims 6 to 10.

12. A storage medium characterized by comprising a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the control method of the motor controller according to any one of claims 1 to 5 when the program is executed.

13. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the control method of the motor controller according to any one of claims 1 to 5 when running.