Method and system for acquiring electromagnetic force waveform of motor end winding

Abstract

The invention discloses a method and system for obtaining the electromagnetic force waveform of the end winding of a motor. Due to the complex structure of the end of the motor, the magnitude of the electromagnetic force received by different positions such as the straight line portion of the end portion, the involute portion of the end portion, and the welding end, etc. The directions are different. The present invention performs three-dimensional modeling on the end winding of the motor, and segments the end of the stator winding in the obtained end model, and performs finite element calculation on the segmented model to obtain the motor in one operating cycle. Compared with the existing method, the electromagnetic force waveform at different positions of the motor end winding can be obtained, and the electromagnetic force waveform of the obtained motor is more accurate, which is beneficial to the stator end The selection of different position fixing methods further guides the structural design of the motor.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a method and system for acquiring electromagnetic force waveforms of motor end windings. Background technique [0002] China's thermal power generation accounts for about 75% of the total power generation, most of which are completed by large-scale generators. With the development of science and technology and society, the capacity of generators is increasing, and the requirements for stable operation of the power grid are also increasing. Therefore, The safe operation of large generators is closely related to the safety and stability of the entire power grid. Most of the stator windings of turbogenerators are formed windings, and the end protruding end is very long, so its fixation is relatively weak, which becomes an important factor for the safe and stable operation of the generator. The internal electromagnetic force also increases, and the vibration problem caused by i...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method and system for obtaining the electromagnetic force waveform of the end winding of the motor. The directions are all different, and the accuracy of the obtained electromagnetic force waveform is not high due to the winding as a whole to obtain the electromagnetic force waveform.

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