Cooling medium flow control method and device for thermal management system of permanent magnet synchronous motor

By acquiring the temperature and turbulent kinetic energy deviation values ​​and their rate of change, PID calculation model instructions are generated to adjust the cooling medium flow rate, thus solving the problem of low cooling efficiency and accuracy in the thermal management system of permanent magnet synchronous motors and achieving efficient and accurate flow control.

CN121012411BActive Publication Date: 2026-07-17CHONGQING SOKON POWER CO LTD
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Patent Information

Application Number
CN202511035321.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-25
Publication Date
2026-07-17
Estimated Expiration
2045-07-25

AI Technical Summary

Technical Problem

Traditional methods for controlling the cooling medium flow in thermal management systems for permanent magnet synchronous motors suffer from low cooling efficiency or low control accuracy.

Method used

By acquiring temperature deviation, turbulent kinetic energy deviation, and temperature change rate, parameter adjustment instructions for the PID calculation model are generated. The PID calculation model is then adjusted to determine the cooling medium flow rate regulation and control the pump speed of the variable frequency oil pump. Fuzzy logic and k-ε model are combined to improve control accuracy.

Benefits of technology

It improves cooling efficiency and control accuracy, reduces cooling medium flow control errors, avoids local overheating of permanent magnet synchronous motors, and enhances adaptive capability.

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Abstract

This application relates to a cooling medium flow control method, apparatus, computer equipment, and storage medium for a permanent magnet synchronous motor thermal management system. The method includes: acquiring a temperature deviation value, a turbulent kinetic energy deviation value, and a temperature change rate; in response to a temperature deviation value being less than a temperature deviation threshold, generating a parameter adjustment command for a PID calculation model based on the temperature deviation value, turbulent kinetic energy deviation value, and temperature change rate; adjusting the parameters of the PID calculation model according to the parameter adjustment command to obtain an adjusted PID calculation model; determining the cooling medium flow rate adjustment amount based on the temperature deviation value and the adjusted PID calculation model; and controlling the pump speed of a variable frequency oil pump based on the cooling medium flow rate adjustment amount. This method can improve cooling efficiency and control accuracy.
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