A novel control strategy for vibration reduction in the permanent magnet motor drive system with eccentric load

Rotary eccentric loads often lead to vibration problems in motors, which may reduced their reliability and operating life. In order to reduce the radial vibration in permanent magnet motors, a real time detection method for rotary eccentric load based on the theoretical analysis of the motor vibration and the mechanical analysis was given, and a novel control strategy based on FOC (field oriented control) was proposed, which could produce the artificial pulsating torque to suppress the impact of eccentric load. The control algorithm was investigated and tested on a real time permanent magnet motor drive system platform. The experimental results indicate that the proposed methods were simple and easy to be applied in the digital control system and the control strategy is feasible.