New Equivalent model and Modal Analysis of Stator Core-Winding System of Permanent Magnet Motor With Concentrated Winding

Abstract

An accurate prediction of modal characteristics of motor stator is essential in order to design a low vibration motor and to operate it quietly. Scholars have done a lot of research on the modal analysis of stator core and winding. However, there are few papers for the 0th-order mode shape and frequency of the stator system. This paper aims to propose a new stator system analysis model, which can effectively analyze the 0th-order mode and improve the model calculation efficiency. Firstly, the modal of stator core and stator core-winding system were analyzed theoretically. Secondly, four stator system finite element analysis models were established. The modal analysis of the stator core and stator core-winding system were carried out using the four models. The validity and computational efficiency of the four models of the stator core and stator core-winding system were compared. A new stator system analysis model was proposed. Thirdly, the modal tests of the stator core and stator core-winding system were carried out by hammering method, and the validity of the finite element analysis model was verified. Compared with the traditional model, the newly proposed model can analyze the 0th-order mode more effectively and improve the computational efficiency.

Noise and vibration modelling of Permanent Magnet Synchronous Motors - a review

“…In order to model this component, two different approaches are currently employed. They refer to two dimensional and tridimensional models, respectively [98], [101].…”

Investigation of Noise Sources in Fractional-Slot Concentrated Winding Motors Considering High-Order Radial/Tangential Electromagnetic Force Combination and Modulation

“…When establishing the winding FE model, the internal structure of the winding is not considered, and it is assumed that the stator teeth and winding are in close contact. The winding, tightly wound within the stator tooth slot and fixed by insulation bracket, can be equivalently modeled as a continuous elastomer with orthotropic material parameters for simplified FE modeling [31], [32].…”

Simulation, Verification and Optimization Design of Electromagnetic Vibration and Noise of Permanent Magnet Synchronous Motor for Vehicle

“…The intrinsic mode of a motor is the inherent vibration characteristic of a mechanical structure, and each mode order has its own specific intrinsic frequency, damping ratio and mode vibration patterns. When the motor electromagnetic force order and the modal order are the same, and the electromagnetic force frequency and the modal inherent frequency are close to each other, a smaller electromagnetic force can produce a larger vibration noise [3]. Therefore, it is important to study the effect of motor structure on the modal's inherent frequency in order to avoid the resonant frequency of the motor and suppress the motor vibration noise.…”