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Estimation method of rotor temperature of electric motor

A rotor temperature, motor technology, applied in the direction of temperature measurement, thermometer, temperature measurement of moving solids in the motor, etc., can solve the problems of the influence of motor accidents, the estimation results are not accurate enough, etc., to achieve the performance temperature, the estimation results are accurate and reliable Effect

Active Publication Date: 2016-09-21
TONGJI UNIV +1
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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the present invention provides a method for estimating the rotor temperature of a motor, which is used to solve the problem that the estimation result of the rotor temperature estimation method in the prior art is not accurate enough and is easily affected by unexpected conditions of the motor question

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  • Estimation method of rotor temperature of electric motor
  • Estimation method of rotor temperature of electric motor
  • Estimation method of rotor temperature of electric motor

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Embodiment Construction

[0042] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0043] see Figure 1 to Figure 6 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic concept of the present invention, although only the components related to the present invention are shown in the diagrams rather than the number, shape and Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and t...

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Abstract

The present invention provides an estimation method of the rotor temperature of an electric motor. The estimation method comprises a step of calculating the rotor loss and the stator winding loss of the electric motor through a rotor loss model and a stator winding loss model according to an electric motor operation state parameter, and a step of estimating the rotor temperature of the electric motor through a thermal model according to the rotor loss and the stator winding loss of the electric motor and a stator iron core temperature. According to the method, through establishing the thermal model among a stator iron core, a stator winding and a rotor, the estimation result of the estimation method is more accurate and reliable and is not influenced by the accident of the motor, and the performance is more stable.

Description

technical field [0001] The invention relates to a method for estimating the rotor temperature of an electric motor, in particular to a method for estimating the rotor temperature of an electric motor based on a thermal model. Background technique [0002] In the prior art, a motor includes a stator and a rotor. The stator refers to the fixed part of the motor, including the iron core supporting the current coil and the frame on which the iron core is installed; the rotor is the rotatable part of the motor, including the permanent magnet and the iron core. Since the permanent magnet is located inside the rotor, it is difficult to install and configure a temperature sensor for detecting the permanent magnet. Therefore, methods for estimating the rotor temperature have been widely proposed in the industry. [0003] Patent 201410478933.1 provides a system and method for estimating the rotor temperature of an electric motor. The method calculates a temperature change of the roto...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/08
CPCG01K13/08G01K2205/00
Inventor 朱元陆科吴志红廖忠义陈长艺韩伟
Owner TONGJI UNIV
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