关键词: 无刷直流电机, PWM变频调速, 谐波, RLC滤波器

Abstract:

Based on the analysis and research of the PWM variable frequency speed regulating system of brushless DC motor, this paper introduces a new kind of RLC filter which can be installed on the PWM inverter output end to improve running stability of the motorand reduce vibration and noise brought by the harmonic. After optimization of RLC filter makes the motor end higher harmonic content is significantly reduced, voltage, current pulsation phenomenon is suppressed, and the simulation results in Matlab/Simulink platform, verify the validity and reliability of the designed filter in this paper.