A Noise Reduction Method For A Permanent Magnet Brushless Motor For A Washing Machine

Into the 21 st century,the rapid development of science and technology,effectively promote the socio-economic development,The motor is called "industrial grain" and provides the necessary impetus to promote the rapid development of industry.DC brushless permanent magnet motor is a new motor,it has many advantages of DC motor and the use of electronic commutation technology to increase the reliability of the motor running to extend the life of the motor and maintenance cycle,so once it will be able to develop rapidly,in the field of home appliances and industrial challenges continue to exchange the dominant position of induction motor.Now a new generation of air conditioners,washing machines and other household equipment have used DC brushless permanent magnet motor to replace the induction motor,which is the trend of science and technology development trend.In this paper,the noise and vibration problems of a DC brushless permanent magnet motor for an 8P / 36 S drum washing machine are analyzed.First of all,a brief description of the DC brushless permanent magnet motor vibration noise at home and abroad research status,to understand the pioneers in improving their vibration noise made unremitting efforts.Secondly,the basic structure,classification and basic working principle of DC brushless permanent magnet motor are introduced.Then the basic concepts and hazards of noise are introduced.The classification and improvement of motor noise are summarized.Then,the vibration of DC brushless permanent magnet motor the main features of noise,the source of vibration noise and how to suppress its vibration and noise.Finally,combined with a DC brushless motor body,with Speed2012 electromagnetic finite element analysis software for the motor steady-state and transient performance simulation,the use of modified mechanical structure and stator core crown open auxiliary groove and other methods,the production of motor samples,To verify the results of the experimental comparison.Through the experimental results,we can find that the above measures can effectively reduce the vibration and noise of DC brushless permanent magnet motor for washing machine,which also provides some reference value for the future research on the noise vibration of brushless permanent magnet motor in accordance with.