KR-102961106-B1 - Active heating method, device, apparatus, storage medium, and program product of a motor

KR102961106B1KR 102961106 B1KR102961106 B1KR 102961106B1KR-102961106-B1

Abstract

The present invention provides a method, device, apparatus, storage medium, and program product for active heating of a motor. The method comprises the steps of: receiving a heating command sent from a thermal management system, wherein the heating command includes heating power; inputting current to the motor based on the heating power and adjusting the phase of a three-phase pulse; continuously detecting the motor iron loss power, determining the difference between the motor iron loss power and the heating power, and, based on the difference between the motor iron loss power and the heating power, adjusting the phase difference of the three-phase pulse until the difference between the motor iron loss power and the heating power is smaller than a preset value, thereby implementing active heating of the motor.

Inventors

리, 밍푸
쉬, 쉰진
장, 윈후이

Assignees

비리디 이-모빌리티 테크놀로지(닝보) 컴퍼니 리미티드
지커 오토모빌 (닝보 항저우 베이 뉴 존) 컴퍼니 리미티드
쩌지앙 길리 홀딩 그룹 씨오., 엘티디.

Dates

Publication Date: 20260507
Application Date: 20230313
Priority Date: 20220317

Claims (14)

In an active heating method for a motor, A step of receiving a heating command sent from a thermal management system, wherein the heating command includes heating power; A step of determining the current value of each phase of the three-phase pulse of the motor based on the heating power; A step of increasing the copper loss of the motor by changing the duty cycle of at least one phase of the above three-phase pulses; A step of measuring the actual copper loss power, and based on the actual copper loss power and the heating power, adjusting the phase difference of the three-phase pulse to adjust the phase of the three-phase pulse, thereby increasing the iron loss of the motor; The method includes the step of continuously detecting the total power loss of the motor caused by copper loss and iron loss, determining the difference between the total power loss and the heating power, and adjusting the phase difference of the three-phase pulse based on the difference between the total power loss and the heating power until the difference between the total power loss and the heating power is smaller than a preset value, thereby enabling the motor to be actively heated. Herein, the step of adjusting the phase difference of the three-phase pulse is characterized by adjusting the phase of at least one phase of the three-phase pulse to indicate the phase difference in the three-phase pulse.
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In paragraph 1, The step of determining the current value of each phase of the three-phase pulse of the motor based on the heating power is, An active heating method for a motor, characterized by including the step of determining the current value of each phase of the three-phase pulse of the motor based on the motor resistance, the conduction voltage drop of the built-in power transistor, the switching loss of the unit current of the built-in power transistor, the switching frequency of the built-in power transistor, and the current relationship of the three-phase pulse.
In Paragraph 7, Based on the above motor resistance, the conduction voltage drop of the built-in power transistor, the switching loss of the built-in power transistor per unit current, the switching frequency of the built-in power transistor, and the current relationship of the three-phase pulse, the calculation formula for the step of determining the current value of each phase of the three-phase pulse of the motor is as follows, and Here, And, An active heating method for a motor characterized in that, in the equation, I a is the a-phase current, I b is the b-phase current, I c is the c-phase current, R is the motor resistance, V ce is the conduction voltage drop of the built-in power transistor, Q is the switching loss of the built-in power transistor per unit current, F is the switching frequency of the built-in power transistor, and k is a constant determined based on the rotor position.
In paragraph 1, The step of measuring the actual copper loss power above is, A step of measuring the current and voltage values input to the motor in the electric vehicle electronic control unit, and determining the actual copper loss power based on the current and voltage values; An active heating method for a motor characterized by including
In paragraph 1, The step of implementing the adjustment of the phase of the three-phase pulse by adjusting the phase difference of the three-phase pulse based on the actual copper loss power and the heating power is as follows: A step of calculating the difference between the actual copper loss power and the heating power, and based on the difference between the actual copper loss power and the heating power, querying a second comparison table to obtain a corresponding phase difference, wherein the second comparison table includes the corresponding relationship between the difference between each actual copper loss power and the heating power and the phase difference; A step of implementing phase adjustment of the three-phase pulse by adjusting the phase difference of the three-phase pulse using the corresponding phase difference; An active heating method for a motor characterized by including
In an active heating device for a motor, A command receiving module that receives a heating command sent from a thermal management system, wherein the heating command includes heating power; A current determination module that determines the current value of each phase of the three-phase pulse of the motor based on the heating power; A third adjustment module that increases the copper loss of the motor by changing the duty cycle of at least one phase of the above three-phase pulses; A fourth adjustment module that measures actual copper loss power and, based on the actual copper loss power and the heating power, adjusts the phase difference of the three-phase pulse to adjust the phase of the three-phase pulse, thereby increasing the iron loss of the motor; and It includes a fifth adjustment module that continuously detects the total power loss of the motor caused by copper loss and iron loss, determines the difference between the total power loss and the heating power, and, based on the difference between the total power loss and the heating power, adjusts the phase difference of the three-phase pulse until the difference between the total power loss and the heating power is smaller than a preset value, thereby causing the motor to be actively heated. Herein, the step of adjusting the phase difference of the three-phase pulse is characterized by adjusting the phase of at least one phase of the three-phase pulse to indicate the phase difference in the three-phase pulse.
In electronic devices, It includes a processor and a memory connected to the processor in communication; The above memory stores computer execution commands; An electronic device characterized in that the processor executes a computer execution command stored in the memory, thereby causing the processor to perform an active heating method of a motor according to any one of claims 1 and 7 to 10.
In a computer-readable storage medium, A computer-readable storage medium characterized in that a computer execution command is stored in the computer-readable storage medium, and the computer execution command is intended to implement an active heating method of a motor according to any one of claims 1 and 7 to 10 when executed by a processor.
In computer programs, A computer program stored on a computer-readable storage medium, characterized in that the computer program implements an active heating method of a motor according to any one of claims 1 and 7 to 10 when executed by a processor.

Description

Active heating method, device, apparatus, storage medium, and program product of a motor The present application relates to the field of electric vehicles, and in particular to a method, apparatus, device, storage medium, and program product for active heating of a motor. The present application claims priority to a Chinese patent application filed with the Chinese Patent Office on March 17, 2022, with application number 202210264853.0 and titled "Method, apparatus, device, storage medium and program product for active heating of a motor," all of which are incorporated by reference into the present application. Electric vehicle technology is currently advancing rapidly, and electric vehicles are gradually replacing traditional fuel-powered vehicles; however, current electric vehicle development faces many challenges, such as battery performance degradation due to low temperatures during winter. Actively heating the battery is an important means of improving battery performance. Currently, in the relevant technology for actively heating a battery, the purpose of improving battery performance is achieved by generally changing the duty cycle of one of the three phases of the motor's current to increase the copper loss of the motor, thereby generating heat in the motor, and then transferring the heat from the motor to the battery to raise the temperature of the battery. However, the inventors discovered that the related technology has a technical problem in that, at least when implementing motor heat generation by increasing the duty cycle, the heat generation efficiency is low, resulting in a slow temperature rise of the battery. FIG. 1 is a diagram showing an application scenario of the active heating method of a motor provided in an embodiment of the present application. FIG. 2 is a flowchart of an active heating method for a motor provided in an embodiment of the present application. FIG. 3 is a diagram showing the three-phase pulse phase provided in an embodiment of the present application. FIG. 4 is a diagram showing a three-phase pulse duty cycle provided in an embodiment of the present application. FIG. 5 is a drawing showing an active heating device for a motor provided in an embodiment of the present application. FIG. 6 is a configuration diagram of an electronic device of an embodiment of the present application. Exemplary embodiments are described in detail herein, and examples are shown in the accompanying drawings. When the following description relates to the accompanying drawings, identical numbers in different drawings represent identical or similar elements unless otherwise specified. The embodiments described in the exemplary embodiments below do not represent all embodiments consistent with this application. On the contrary, they are merely examples of apparatuses and methods consistent with those described in detail in the appended claims and some aspects of this application. Electric vehicle technology is currently advancing rapidly, and electric vehicles can frequently be seen on city streets. Electric vehicles have the advantages of low noise, a simple structure, and zero emissions. At the same time, however, electric vehicles face many challenges, such as the need to increase the number of chargers and the degradation of battery performance in low-temperature conditions. Regarding the problem of battery performance degradation, the current major solution involves heating the motor by increasing the motor's copper losses through adjusting the duty cycle of one of the three phases of the motor's current, and further heating the battery by transferring the heat from the motor to the battery through a device such as a pipeline filled with coolant. However, the current method of heating the motor using the duty cycle has low heating efficiency and a slow rate of increase in battery temperature. Regarding the technical problem described above, the present application provides a technical concept for implementing active heating of a motor by receiving a heating command, inputting a three-phase pulse to the motor, and increasing the iron loss of the motor by changing the phase difference of the three-phase pulse. FIG. 1 is a diagram illustrating an application scenario of an active heating method for a motor provided in an embodiment of the present application. As shown in FIG. 1, the scenario includes a thermal management system (101), an electric vehicle electronic control unit (102), and a motor (103). In the specific implementation process, the thermal management system (101) sends a heating command to the electric vehicle electronic control unit (102), and the heating command may be sent when the temperature is lower than a preset temperature, or may be sent after receiving a control command from an external device, and the external device may be, for example, a server, a computer, a mobile phone, etc. After receiving a heating command, the electric vehicle electronic control unit (102) in