Analysis of Modal and Vibration Reduction of an Interior Permanent Magnet Synchronous Motor

Abstract

Interior permanent magnet synchronous motors (IPMSMs) have been widely used in a variety of applications. The IPMSM will generate vibration as well as functioning like other traditional motors, which will affect the performance and the durability of the motor itself. The modal and vibration characteristics of the IPMSM and an optimization design to reduce vibration are researched in this paper. The formulas of electromagnetic force are deduced and analyzed, and a finite element model is established. The model is used for modal calculation, and the low order natural frequency is obtained. Then, the modal test is carried out by the hammering method, and the resonance frequency is found by analyzing the results. Eventually, the electromagnetic vibration is analyzed by taking the electromagnetic force as the load condition, the vibration displacement waveform is obtained, and the correctness of the dynamic calculation is verified by vibration tests. In addition, an eccentric tooth edge design is proposed to weaken the dominant radial electromagnetic force and the vibration displacement is compared with the designed prototype. This design method, which could help to reduce the vibration and noise of the IPMSM, has great potential in future applications.

High Efficient Permanent Magnet Synchronous Motor Design, Electromagnetic and Noise-Vibration Analyzes

“…Since electromagnetic forces cannot be eliminated theoretically and practically, minimizing these forces is very important for the life of the motor and driven load. Radial electromagnetic force density in the air gap according to the 'Maxwell Stress Tensor' equation (3) it is calculated from the formula [4]. Where θ is the angular position of the stator, t time, μ0 air gap magnetic permeability, air gap radial flux density .…”

“…Noise and vibration in these motors are examined under three main titles as electromagnetic, mechanical and aerodynamic as shown figure2. Especially in the electric vehicles, aviation and servo industry, the generation of noise and vibration have high importance [3,4,5]. Electromagnetic noise and vibration occurs when radial electromagnetic forces in the air gap effect on the stator teeth.…”

“…It is not possible to eliminate these forces, but these forces can be minimized. These forces cause the stator stack and the frame to be deformed over time due to the vibration effect [3,4,5].…”

Analytical modeling‐based optimal design of multilayered and multisegmented D‐type interior permanent magnet synchronous motor

“…A similar research is performed to optimize the single‐layer tangential‐type IPMSM presented in Ref. 20.…”

Analysis and comparison of performance of permanent magnet servo motors after stator shifting combination

“…In order to reduce cogging torque, stator slotting, unequal pole arc coefficient and axial sectional staggered splicing of the rotor are often used [10]. The methods of modification or slotting of stator tooth are focused by some scholars to reduce the vibration noise caused by MMF [11–13]. Although it works effective, one of the above methods can only solve a single problem.…”