Journal of Harbin University of Science and Technology (Apr 2021)
Electromagnetic Force Analysis of Double Three-phase Induction Motor Operating in Fault-tolerant State
Abstract
The electromagnetic force of double three-phase asynchronous induction motor before and after fault tolerance and during fault operation will produce electromagnetic torque and vibration noise． In order to analyze the influence of electromagnetic force on the motor， the tangential electromagnetic force density and radial electromagnetic force density of double three-phase induction motor at rated，phase-absent and fault-tolerant conditions are calculated by combining finite element magnetic field analysis and Maxwell tensor method，and the frequency spectrum analysis is carried out to compare and summarize the variation law． Simultaneously，by comparing the finite element analysis results of electromagnetic torque and prototype test，the accuracy of the calculation method of electromagnetic force density is verified，and the natural frequency of the whole double three- phase induction motor is analyzed，and passed the motor test，so as to verify the rationality of the motor for vibration and noise． The analysis method and results of electromagnetic force provide a reference for the calculation of electromagnetic force of similar motors，and have important theoretical and practical significance．
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