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Method, device, motor and storage medium for estimating motor rotor temperature

A technology for motor rotor and transient temperature, which is used in the estimation/correction of motor parameters, temperature measurement of moving solids, design optimization/simulation, etc. Deviation and other problems to achieve the effect of ensuring the success rate, reducing the cost increase, and improving the accuracy

Active Publication Date: 2021-11-05
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The permanent magnets in the motor are located inside the rotor, so it is difficult to install a temperature sensor configured to detect the permanent magnets. If a wireless transmission temperature sensor is used, the cost will be very high
[0003] Existing motor rotor temperature estimation generally only refers to individual parameters such as motor stator loss and rotor loss, and does not analyze the parameters related to the change of motor rotor temperature, which leads to a certain deviation in the accuracy of the estimated motor rotor temperature

Method used

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  • Method, device, motor and storage medium for estimating motor rotor temperature
  • Method, device, motor and storage medium for estimating motor rotor temperature
  • Method, device, motor and storage medium for estimating motor rotor temperature

Examples

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Embodiment 1

[0027] Figure 1A It is a flowchart of a method for estimating the rotor temperature of a motor provided in Embodiment 1 of the present invention. This embodiment can be applied to any kind of permanent magnet synchronous motor. The method for estimating the rotor temperature of a motor provided in this embodiment can be executed by the device for estimating the rotor temperature of a motor provided in an embodiment of the present invention, which can be realized by software and / or hardware, and integrated into the device for executing the method In this embodiment, the device implementing the method may be a permanent magnet synchronous motor.

[0028] Specifically, refer to Figure 1A , the method specifically includes the following steps:

[0029] S110. Calculate the steady-state temperature of the motor rotor according to the power loss of the motor rotor, the power loss of the physical components in the associated components of the motor rotor, the temperature of the ext...

Embodiment 2

[0046] figure 2 It is a flowchart of a method for estimating the rotor temperature of a motor provided by Embodiment 2 of the present invention. The embodiments of the present invention are optimized on the basis of the foregoing embodiments. Optionally, this embodiment explains in detail the calculation process of the steady-state temperature and the transient temperature of the motor rotor.

[0047] Specifically, see figure 2 , the method of this embodiment may specifically include:

[0048] S210, detecting the temperature of the external component, and calculating the power loss of the motor rotor and the physical component respectively according to the load parameter of the motor rotor.

[0049] Specifically, the external component in this embodiment is a stator cooling water component, and a corresponding water temperature sensor can be installed on the stator cooling water component in advance to detect the temperature of the stator cooling water component in real t...

Embodiment 3

[0081] image 3 A schematic structural diagram of a device for estimating the rotor temperature of a motor provided in Embodiment 3 of the present invention, as shown in image 3 As shown, the device may include:

[0082]The steady-state temperature calculation module 310 is used to calculate the temperature of the motor rotor according to the power loss of the motor rotor, the power loss of the physical components in the associated components of the motor rotor, the temperature of the external components in the associated components, and the thermal conductance of the motor rotor and the associated components. steady state temperature;

[0083] The calibration parameter search module 320 is used to find out the corresponding temperature transfer calibration parameters according to the load parameters of the motor rotor;

[0084] The transient temperature estimation module 330 is configured to adjust the steady-state temperature of the motor rotor according to the temperatur...

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Abstract

The embodiment of the invention discloses a method, a device, a motor and a storage medium for estimating the rotor temperature of a motor. Wherein, the method includes: calculating the steady-state temperature of the motor rotor according to the power loss of the motor rotor, the power loss of the physical components in the associated components of the motor rotor, the temperature of the external components in the associated components, and the thermal conductance of the motor rotor and the associated components Find the corresponding temperature transfer calibration parameters according to the load parameters of the motor rotor; adjust the steady-state temperature of the motor rotor according to the temperature transfer calibration parameters to obtain the transient temperature of the motor rotor. The technical solution provided by the embodiment of the present invention enables the estimated transient temperature of the motor rotor to follow the corresponding actual temperature in real time, realizes real-time monitoring of the motor rotor temperature, improves the accuracy of the motor rotor temperature, and reduces the use of temperature sensors to detect The increase in cost and failure rate caused by the temperature of the motor rotor ensures the success rate of motor operation.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of vehicle data processing, and in particular to a method, device, motor and storage medium for estimating the rotor temperature of a motor. Background technique [0002] At present, a permanent magnet synchronous motor includes a stator and a rotor, the stator refers to a fixed part of the motor, and the rotor is a rotatable part of the motor. Under the load condition of the permanent magnet synchronous motor, the rotor temperature will change with time. The change of the rotor temperature will cause the permanent magnet flux linkage in the motor to change accordingly, and the change of the motor flux linkage will affect the torque accuracy of the motor output. The permanent magnets in the motor are located inside the rotor, so it is difficult to install a temperature sensor configured to detect the permanent magnets. If a temperature sensor for wireless transmission is used, the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K13/08G06F30/23H02P23/14
CPCG01K13/08H02P23/14
Inventor 潘忠亮李帅刘亚川范雨卉李岩李伟亮李芝炳
Owner CHINA FIRST AUTOMOBILE