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Motor rotor temperature detection method

A technology of rotor temperature and detection method, which is applied in the control of generators, motor generators, electronic commutation motor control, etc. Effect

Active Publication Date: 2021-02-19
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for detecting the rotor temperature of a motor, so as to solve the defects of the existing rotor temperature detection method that it takes a long time and has low precision

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Embodiment Construction

[0065] The method for detecting the temperature of the motor rotor proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0066] figure 1 It is a schematic flow chart of the detection method of the rotor temperature of the motor in an embodiment of the present invention, combined below figure 1 As shown, each step of the method for detecting the rotor temperature in this embodiment will be described in detail.

[0067] In step S100, the factor items related to the d-axis current Id, the q-axis current Iq and the rotational speed n in the q-axis voltage equation are...

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Abstract

The invention provides a method for detecting the temperature of a rotor of a motor. The method comprises the steps: converting a q-axis voltage equation, calibrating the converted q-axis voltage equation by using the reference motor, so that when the to-be-detected motor is detected, the flux linkage value of the to-be-detected motor can be calculated according to the calibration result in combination with the converted q-axis voltage equation, and the rotor temperature of the motor can be calculated. Namely, the rotor temperature detection method is combined with function conversion, the detection process is relatively simple, the detection precision is relatively high, and the consumed time is relatively short.

Description

technical field [0001] The invention relates to the field of motors, in particular to a method for detecting the rotor temperature of a motor. Background technique [0002] Generally speaking, the main function of the motor is to generate driving torque as a power source for electrical devices or various machines. Commonly used motors include, for example, permanent magnet synchronous motors. [0003] Among them, the rotor temperature of the motor will directly affect the output torque of the motor, and when the rotor temperature changes, the output torque will change accordingly. And, by correcting the rotor flux linkage in real time through the rotor temperature, the torque accuracy can be improved. At the same time, the rotor temperature can also be used to prevent the irreversible demagnetization of the permanent magnet steel. If the rotor temperature is not monitored, the irreversible demagnetization will cause a large permanent decline in the performance of the motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 刘翔杨红周奇
Owner UNITED AUTOMOTIVE ELECTRONICS SYST