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Demagnetization environment simulation device and method for predicting timeliness demagnetization risk of permanent magnet motor

A kind of environment simulation device, permanent magnet motor technology

Pending Publication Date: 2021-12-10
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a demagnetization environment simulation device and a method for predicting the time-dependent demagnetization risk of permanent magnet motors, solve the difficult problem of predicting the time-sensitive demagnetization risks of permanent magnet motors, and consider temperature, mechanical vibration, DC reverse magnetic field and alternating current. Effect of magnetic field on demagnetization of tested sample

Method used

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  • Demagnetization environment simulation device and method for predicting timeliness demagnetization risk of permanent magnet motor
  • Demagnetization environment simulation device and method for predicting timeliness demagnetization risk of permanent magnet motor
  • Demagnetization environment simulation device and method for predicting timeliness demagnetization risk of permanent magnet motor

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Embodiment 1

[0034] Such as Figure 1-Figure 4As shown: this embodiment provides a demagnetization environment simulation device 100, including an iron core 1, a DC demagnetization coil, an AC demagnetization coil 7, a vibration mechanism 2, and a heating mechanism 3. The iron core 1 is provided with an air gap, and the tested sample 10 Set in the groove of the iron core 1, the DC demagnetization coil and the AC demagnetization coil 7 are both wound on the iron core 1, and the DC demagnetization coil and the AC demagnetization coil 7 are used to apply the DC demagnetization magnetic field and the AC demagnetization magnetic field to the tested sample 10, The vibrating mechanism 2 is arranged under the tested sample 10, the vibrating mechanism 2 is used to provide mechanical vibration to the tested sample 10, the heating mechanism 3 is in contact with the tested sample 10, the heating mechanism 3 is used to heat the tested sample 10, and is Test sample 10 is the same as the permanent magnet...

Embodiment 2

[0040] Such as Figure 5-Figure 6 As shown: this embodiment provides a method for predicting the time-dependent demagnetization risk of a permanent magnet motor, including the following steps:

[0041] S1, according to the initial demagnetization curve of the tested sample 10, establish the electromagnetic analysis model, temperature analysis model and mechanical vibration analysis model of the permanent magnet motor, bring in the rated current and voltage, and calculate the demagnetization risk criterion index and working environment of the permanent magnet motor index;

[0042] In S1, establishing the analytical model of the electromagnetic, temperature and mechanical vibration of the permanent magnet motor specifically includes the following steps: using the initial demagnetization curve of the tested sample 10 and the magnetic permeability characteristics of the permanent magnet motor material, establishing an electromagnetic analytical model of the permanent magnet motor;...

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Abstract

The invention discloses a demagnetization environment simulation device and a method for predicting the timeliness demagnetization risk of a permanent magnet motor, and relates to the technical field of motor performance evaluation. The demagnetization environment simulation device comprises an iron core, a direct-current demagnetization coil, an alternating-current demagnetization coil, a vibration mechanism and a heating mechanism;a tested sample is arranged in the groove of the iron core; the direct-current demagnetization coil and the alternating-current demagnetization coil are both wound on the iron core, the direct-current demagnetization coil and the alternating-current demagnetization coil are used for applying a direct-current demagnetizing magnetic field and an alternating-current demagnetizing magnetic field to a tested sample, the vibration mechanism is used for providing mechanical vibration for the tested sample, and the heating mechanism is used for heating the tested sample. The influence of temperature, mechanical vibration, a direct-current demagnetization magnetic field and an alternating demagnetization magnetic field on demagnetization of the tested sample is considered, the actual working state of the permanent magnet motor can be simulated, and the demagnetization risk and reliability of the permanent magnet motor can be accurately predicted. In addition, the invention relates to a method for predicting the timeliness demagnetization risk of the permanent magnet motor, and the method is implemented based on the demagnetization environment simulation device.

Description

technical field [0001] The invention relates to the technical field of motor performance evaluation, in particular to a demagnetization environment simulation device and a method for predicting the time-dependent demagnetization risk of a permanent magnet motor. Background technique [0002] At this stage, permanent magnet motors are more and more used in transportation vehicles, such as automobiles and airplanes. Permanent magnets are important components of permanent magnet motors, and their demagnetization risk is directly related to the safety and reliability of permanent magnet motor operation. Due to the pursuit of high torque density and high power density, the working environment of permanent magnets is becoming increasingly harsh, so it is very important to estimate the risk of permanent magnet demagnetization. However, most of the existing estimation methods only consider the demagnetization effect of temperature in the design stage, and do not analyze the timelin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G01R33/12
CPCG01R31/34G01R33/12
Inventor 马伊光曹继伟张成明李立毅
Owner HARBIN INST OF TECH
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