Motor vibration and noise is an important index to measure motor performance. How to reduce vibration and noise is one of the important topics in the field of motor design. Analysis, calculation, and reduction of motor vibration and noise have attracted more and more attention from motor designers. Based on the three main types of noise sources of motors, this paper firstly analyzes their causes and mechanisms and secondly introduces their main research methods. Although there are many summary articles on the research of motor vibration and noise, most of the theories and research methods on the causes of various kinds of noise are not comprehensive enough, lacking theoretical calculation and analysis, especially for mechanical noise and aerodynamic noise. This paper summarizes the research in the recent ten years, especially in the recent five years, with a view to providing a reference for the future development of this field.

Permanent magnetization of electric windlass and mooring winch (EWMW) has become a research trend in the development of new generation deck machinery. The paper investigates the development of a low-speed and high-efficiency permanent magnet synchronous motor (PMSM) and its drive system based on the load characteristics and special requirements of an EWMW. Firstly, the design specifications and key points of the motor drive system are analyzed. Secondly, a design method of parameter matching is proposed to design a 110 kW 75 r/min PMSM based on finite element method, field circuit coupling, and co-simulation. Finally, a prototype is developed and applied to a 45 T EWMW. The test results show that the PMSM can attain an efficiency of 94.3% at the rated operation, good traction characteristics with high torque at low speed, and 3 times wide flux-weakening region at constant power. Therefore, the matching design method is effective in the design of PMSM and drive system for EWMW.

The development of an external rotor permanent magnet synchronous motor (ERPMSM) with integer slots involving winding temperature rise and vibration noise was presented in this paper. Based on analyzing the characteristics and influence of different winding forms, a 710 kW 76.5 RPM ERPMSM with different pole slots with 72s/60p and 108s/36p for a coal-mine belt conveyor was calculated and analyzed using electromagnetic field and temperature and fluid field,and the structure mechanics of the PMSM with 108s/36p was also analyzed. Finally, the new prototype was developed and tested. The test results show that the maximum temperature of the winding is 94 °C, and the Vibration intensity is 1.12 mm/s, which is less than the relevant standard value. Major performance comparison tests also meets design expectations, it was verified that the low-speed high torque ERPMSM with integer slots has lower winding temperature and vibration noise.

The low vibration and noise of the integrated PMSM for electric canned pump design are presented in this paper.Based on analyzing the characteristics of the main excitation vibration sources characteristics of the integrated canned pump, a finite element simulation model and optimization design method of “electromagnetic-fluid-mechanical” multi-physics coupling are established and proposed.Then,two different structural schemes with the same inner and outer diameter and power were compared and optimized. Finally,the new prototype was developed and tested. The test results show that the motor runs normally at synchronous speed, the vibration mechanical acceleration is reduced by 13 dB, the noise is reduced by 5 dB(A), and efficiency is increased by 3.5% under the rated load. The validity and correctness of the low-noise design method are verified.