Abstract
The lightweight design of the electric vehicle motor brought about more serious vibration and noise problem of the motor. An accurate modal calculation was the basis for the study of the vibration and noise characteristics of the electric vehicle motor. The finite element method was used to perform the modal simulation of the PMSM. Through the reasonable simplification and equivalence of the motor stator model, the first 7 orders natural frequencies and corresponding modes of the motor stator under the free state were calculated. After that, the accuracy of the finite element model was verified by the hammering modal experiment of the prototype. Furthermore, the above results will provide the theoretical basis for the electric vehicle motor’s vibration control and NVH improvement.
Highlights
As a core component of electric vehicle, the research and development of the driving motor has attracted great attention at home and abroad
Finite Element Method (FEM) will be used to conduct modal analysis on a driving motor of electric vehicle with a rated power of 42 kW, and the natural frequency and vibration mode of the motor will be obtained by simulation
The driving motor for electric vehicles studied in this paper is a forced water-cooled permanent magnet synchronous motor (PMSM), which is mainly composed of a front-end cover, a casing, a stator rotor with a copper wire and a rear end cover
Summary
As a core component of electric vehicle, the research and development of the driving motor has attracted great attention at home and abroad. There are three main methods for modal analysis of motors: analytical method and Finite Element Method (FEM) and test method. The FEM method can be used for modal calculation of irregular motor structure with high precision and wide application. The modal parameters obtained by the modal test method are relatively accurate, but the cost is high because a large number of sensors need to be placed on the motor surface and more instrument channels are needed. ANALYSIS ON THE VIBRATION MODES OF THE ELECTRIC VEHICLE MOTOR STATOR. FEM will be used to conduct modal analysis on a driving motor of electric vehicle with a rated power of 42 kW, and the natural frequency and vibration mode of the motor will be obtained by simulation. The improved design of stator structure is given according to the modal parameters of the motor stator
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