CN-122021423-A - Motor temperature field simulation method, system, equipment and storage medium

CN122021423ACN 122021423 ACN122021423 ACN 122021423ACN-122021423-A

Abstract

The application discloses a motor temperature field simulation method, a system, equipment and a storage medium, which belong to the technical field of motors, and the motor temperature field simulation method provided by the embodiment of the application determines a simulation result of three-dimensional spray transient simulation of a stator of the motor and a simulation result of three-dimensional oil throwing transient simulation in a rotor of the motor through a first simulation result of flow distribution of a cooling oil way of the motor, and calculates a heat exchange coefficient of the motor and cooling oil in a simulation manner according to the simulation result of three-dimensional spray transient simulation of the stator of the motor and the simulation result of three-dimensional oil throwing transient simulation in the rotor of the motor. And the heat exchange coefficient between the stator and the rotor is further determined by combining a one-dimensional thermal management model of the motor. And finally, carrying out three-dimensional temperature field simulation on the motor according to the heat exchange coefficient between the stator and the rotor and the heat exchange coefficient between the motor and cooling oil to obtain the temperature field distribution of the motor, thereby realizing the simulation of the temperature field of the oil-cooled motor.

Inventors

LU JUNJIE
WANG ZHIHAO
LIANG QIQI
CAO XIAO
WU YUANQIANG

Assignees

浙江凌昇动力科技有限公司
浙江零跑科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260122

Claims (10)

1. The motor temperature field simulation method is characterized by comprising a stator, a rotor and a cooling oil path, wherein cooling oil flows in the cooling oil path, and the simulation method comprises the following steps: Acquiring a first simulation result of the flow distribution of the cooling oil way; Determining a second simulation result and a third simulation result according to the first simulation result, wherein the second simulation result is a simulation result of three-dimensional spraying transient simulation of a stator of the motor, and the third simulation result is a simulation result of three-dimensional oil throwing transient simulation in a rotor of the motor; determining a heat exchange coefficient of the motor and the cooling oil according to the second simulation result and the third simulation result; determining a heat exchange coefficient between the stator and the rotor according to the one-dimensional heat management model and the heat exchange coefficient between the motor and the cooling oil; And loading the loss of the motor by using the heat exchange coefficient of the motor and the cooling oil and the heat exchange coefficient between the stator and the rotor, and carrying out three-dimensional temperature field simulation on the motor to determine the temperature field distribution of the motor.
2. The method of claim 1, wherein determining a second simulation result and a third simulation result from the first simulation result comprises: determining the flow of each outlet of the spray pipe in the cooling oil circuit according to the first simulation result; determining a first flow boundary and a second flow boundary according to the flow of each outlet of the spray pipe; and determining the second simulation result and the third simulation result according to the first flow boundary and the second flow boundary.
3. The method of claim 2, wherein the determining the second simulation result and the third simulation result from the first flow boundary and the second flow boundary comprises: inputting the first flow boundary as a boundary of the three-dimensional spraying transient simulation of the stator to simulate to obtain the second simulation result; and taking the second flow boundary as a boundary input of the three-dimensional oil slinging transient simulation in the rotor to simulate and obtain the third simulation result.
4. The method of claim 1, wherein the heat transfer coefficient of the electric machine with the cooling oil comprises a first heat transfer coefficient of the stator with the cooling oil and a second heat transfer coefficient of the rotor with the cooling oil.
5. The method of claim 4, wherein said determining a heat transfer coefficient of the motor and the cooling oil based on the second simulation result and the third simulation result comprises: And determining the first heat exchange coefficient according to the second simulation result, and determining the second heat exchange coefficient according to the third simulation result.
6. The method of claim 1, wherein said determining a heat transfer coefficient between the stator and the rotor based on the one-dimensional thermal management model and the heat transfer coefficient of the motor and the cooling oil comprises: and taking the heat exchange coefficient of the motor and the cooling oil as the boundary of the one-dimensional thermal management model to simulate and obtain the heat exchange coefficient between the stator and the rotor.
7. The method of claim 1, wherein loading the losses of the motor using the heat transfer coefficients of the motor and the cooling oil and the heat transfer coefficients between the stator and the rotor and performing a three-dimensional temperature field simulation of the motor to determine a temperature field distribution of the motor comprises: And taking the heat exchange coefficient of the motor and the cooling oil, the heat exchange coefficient between the stator and the rotor and the loss of the motor as inputs of the three-dimensional temperature field simulation, and calculating the temperature field distribution of the motor in the three-dimensional temperature field simulation according to a preset heat conduction differential equation.
8. The motor temperature field simulation system is characterized by comprising a stator, a rotor and a cooling oil path, wherein cooling oil flows in the cooling oil path, and the simulation system comprises: the first acquisition module is used for acquiring a first simulation result of the flow distribution of the cooling oil way; The first determining module is used for determining a second simulation result and a third simulation result according to the first simulation result, wherein the second simulation result is a simulation result of three-dimensional spraying transient simulation of a stator of the motor, and the third simulation result is a simulation result of three-dimensional oil throwing transient simulation in a rotor of the motor; the second determining module is used for determining the heat exchange coefficient of the motor and the cooling oil according to the second simulation result and the third simulation result; the second acquisition module is used for acquiring a one-dimensional thermal management model of the motor; The third determining module is used for determining the heat exchange coefficient between the stator and the rotor according to the one-dimensional heat management model and the heat exchange coefficient between the motor and the cooling oil; And the fourth determining module is used for loading the loss of the motor by utilizing the heat exchange coefficient of the motor and the cooling oil and the heat exchange coefficient between the stator and the rotor, and carrying out three-dimensional temperature field simulation on the motor so as to determine the temperature field distribution of the motor.
9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program which, when executed by the processor, implements the method of any of claims 1-7.
10. A computer readable storage medium, having stored thereon a computer program, the computer program being loaded by a processor to perform the steps of the method according to any of claims 1-7.

Description

Motor temperature field simulation method, system, equipment and storage medium Technical Field The application relates to the technical field of motors, in particular to a motor temperature field simulation method, a system, equipment and a storage medium. Background With the increase of motor power, the water-cooled motor can not meet the heat dissipation requirement of the motor, and most of motors are directly cooled in an oil cooling mode. The oil in the oil-cooled motor has good insulativity and high heat dissipation efficiency, and can be used as a motor cooling medium. The oil liquid takes away the heat generated in the motor through circulation, so that the working temperature of the motor can be effectively reduced, moving parts such as bearings and gears of the motor can be lubricated, abrasion and friction are reduced, and the service life is prolonged. In the early stage of motor design, how to quickly identify the high temperature point of a motor is a problem faced in motor development. The motor temperature field simulation method in the related art mainly comprises a fluid-solid coupling method through steady state solving, wherein the steady state solving method cannot reflect an actual physical process, and a complex multiphase flow problem cannot be solved by a steady state in terms of physical principles. This is because spray cooling is involved in oil cooled motors, the process is multi-phase flow, the multiphase flow problem itself is a transient problem, and some non-physical consequences can occur with steady state solutions. Therefore, a solution is needed that enables simulation of the temperature field of an oil cooled motor. Disclosure of Invention A motor temperature field simulation method, system, equipment and storage medium are provided to realize the simulation of an oil cooling motor temperature field. In a first aspect, a method for simulating a temperature field of a motor is provided, the motor includes a stator, a rotor and a cooling oil path, cooling oil flows in the cooling oil path, and the simulation method includes: obtaining a first simulation result of flow distribution of a cooling oil way; Determining a second simulation result and a third simulation result according to the first simulation result, wherein the second simulation result is a simulation result of three-dimensional spraying transient simulation of a stator of the motor, and the third simulation result is a simulation result of three-dimensional oil throwing transient simulation in a rotor of the motor; Determining the heat exchange coefficient of the motor and the cooling oil according to the second simulation result and the third simulation result; determining a heat exchange coefficient between a stator and a rotor according to the one-dimensional heat management model and the heat exchange coefficient between the motor and cooling oil; and loading the loss of the motor by using the heat exchange coefficient of the motor and the cooling oil and the heat exchange coefficient between the stator and the rotor, and carrying out three-dimensional temperature field simulation on the motor to determine the temperature field distribution of the motor. In some embodiments, determining the second simulation result and the third simulation result from the first simulation result includes: determining the flow of each outlet of the spray pipe in the cooling oil circuit according to the first simulation result; determining a first flow boundary and a second flow boundary according to the flow of each outlet of the spray pipe; and determining a second simulation result and a third simulation result according to the first flow boundary and the second flow boundary. In some embodiments, determining the second simulation result and the third simulation result from the first flow boundary and the second flow boundary comprises: inputting the first flow boundary as a boundary of the three-dimensional spray transient simulation of the stator to obtain a second simulation result through simulation; And taking the second flow boundary as the boundary input of the three-dimensional oil slinging transient simulation in the rotor to obtain a third simulation result through simulation. In some embodiments, the heat transfer coefficients of the motor and the cooling oil include a first heat transfer coefficient of the stator and the cooling oil, and a second heat transfer coefficient of the rotor and the cooling oil. In some embodiments, determining the heat exchange coefficient of the motor and the cooling oil according to the second simulation result and the third simulation result includes: and determining the first heat exchange coefficient according to the second simulation result, and determining the second heat exchange coefficient according to the third simulation result. In some embodiments, determining the heat transfer coefficient between the stator and the rotor from the one-dimensional thermal management mo