A method for real-time monitoring of motor temperature distribution

A technology of motor temperature and boundary temperature, applied in electrical digital data processing, instruments, calculations, etc., can solve the problems of finite element method calculation complexity, time-consuming, unsuitable for real-time monitoring, etc., to achieve real-time monitoring and simple model , the effect of fast calculation speed

Inactive Publication Date: 2016-09-14
WUHAN UNIV
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Problems solved by technology

However, the calculation of finite element method is complex and time-consuming, so it is not suitable for real-time monitoring

Method used

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  • A method for real-time monitoring of motor temperature distribution
  • A method for real-time monitoring of motor temperature distribution
  • A method for real-time monitoring of motor temperature distribution

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Embodiment Construction

[0052] The basic idea of ​​the invention is as follows: starting from the heat conduction equation (1), adopting the Green's function to represent the heat-conducting equation; using the finite element method to calculate the Green's functions corresponding to different heat transfer coefficients off-line, and forming a Green's function library; real-time acquisition from the actual operating load of the motor The heat source in the motor, and the appropriate Green's function is selected according to the heat source in the motor to calculate the temperature distribution inside the motor. The invention can provide the calculation accuracy very close to that of the finite element method, at the same time, the temperature of the motor at any position can be obtained, the calculation speed is fast, and it is suitable for the real-time monitoring of the motor temperature.

[0053] The present invention is based on the thermal conductivity equation and boundary conditions. For a motor...

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Abstract

The invention discloses a motor temperature distribution real-time monitoring method. The motor temperature distribution real-time monitoring method includes the steps that (1) a Green function library is established, (2) the distribution of internal heat sources of a motor is obtained and the distribution of internal heat points of the motor is determined, (3) the temperature distribution of the motor is obtained according to the distribution of the internal heat sources of the motor and the Green function library, and the temperature distribution of the motor includes the temperature of motor optional position, the average temperature and the temperature of the heat points. The motor temperature distribution real-time monitoring method can accurately simulate the practical work state of the motor, has the advantages of being simple in model, high in computational accuracy, rapid in calculation and the like, and is suitable for real-time monitoring. By means of the motor temperature distribution real-time monitoring method, the variation information of the temperature inside the motor can be accurately monitored in real time, overtemperature accidents are avoided, and therefore the operating safety of the motor is protected.

Description

technical field [0001] The invention relates to a real-time monitoring method for motor hot spot temperature and average temperature. Background technique [0002] The temperature rise of the motor directly affects the insulation life of the winding, which is related to the operating life and reliability of the motor. The design of modern high-performance motors mostly uses higher electromagnetic loads, which leads to a significant increase in the temperature rise of the motor during operation. The low temperature rise of the motor is one of the important indicators to measure the performance of the motor. It is directly related to the service life of the motor, and also affects the motor. Output, efficiency and other performance have a certain impact. Therefore, during the use of the motor, it is particularly important to conduct a comprehensive thermal analysis inside the motor. Real-time monitoring of the global temperature, especially the hot spot temperature, in the mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 张恒良
Owner WUHAN UNIV
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