Study on Electromagnetic Exciting Force Characteristics and Electromagnetic Noise of Permanent Magnet DC Motor
Electromagnetic exciting force is the key to generate electromagnetic noise. The characteristics of electromagnetic exciting force and the causing of electromagnetic noise were analyzed after the power was off for cooling fan Permanent Magnet DC (PMDC) motor. Time-stepping finite element method was selected to calculate its several parameters, such as air gap magnetic density harmonics generated by the stator and rotor, torque ripple and unbalanced magnetic pull at its different speed.Experiment on unloading vibration noise was carried out to confirm the validity of electromagnetic exciting force analysis. The results show: electromagnetic force amplitude keeps constant while the motor speed changing. Torque ripple decreases while the motor speed down. A kind of electromagnetic noise called howling noise produced by PMDC motor used in car cooling fan is mainly due to resonance. So the best way to eliminate this motors noise is to improve the order of electromagnetic waves and avoid the electromagnetic resonance.
Permanent Magnet DC Motor Electromagnetic Exciting Force Air Gap Magnetic Flux Density Harmonic Torque Ripple Unbalanced Magnetic Pull Electromagnetic Noise
Manlan Liu Tianda Yu Shumei Cui David He
School of Mechatronic Engineering, Harbin Institute of Technology Department of Mechanical & Industr School of Electric Engineering, Harbin Institute of Technology, Harbin 150001, China Department of Mechanical & Industrial Engineering, University of Illinois at Chicago, Chicago,IL,606
国际会议
三亚
英文
323-328
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）