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

Abstract

The invention discloses a method and a system for acquiring electromagnetic force waveform of a motor end winding. The end part of the motor is complex in structure and the electromagnetic forces applied to different positions such as the end straight line part, the end involute part and the welding end are different in magnitude and direction,so the method comprises the steps: carrying out three-dimensional modeling on the end winding of the motor; segmenting the end part of the stator winding in the obtained end part model; performing finite element calculation on the segmented model; obtaining electromagnetic force waveforms of each section of the end part of the stator winding of the motor in different directions in one operation period. Compared with an existing method, the method canobtainelectromagnetic force waveforms of different positions of the motor end winding, the obtained electromagnetic force waveforms of the motor are more accurate, the selection of fixing modes of different positions of the stator end is facilitated, and the structural design of the motor is further guided.

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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