【作者】 李海珍； 巨永锋； 雷旭；

【Author】 LI Haizhen;JU Yongfeng;LEI Xu;School of Electronics and Control engineering,Chang’an University;

【机构】 长安大学电子与控制工程学院；

【摘要】 永磁无刷直流电机在换相的过程中会产生较大的转矩脉动。为了解决这一问题,提出一种适用于实际生产的新型控制策略,即改进重叠换相法。该策略从定量的角度确定了脉宽调制(PWM)方式和重叠换相法有效抑制脉动的适用范围,并且基于定频采样非换相电流确定了换相时间。通过仿真,对比分析波形及实验数据,验证了改进后的重叠换相法可以有效地减少无刷直流电机换相转矩脉动。更多还原

【Abstract】 The permanent magnet brushless DC motor can cause higher torque ripple when it commutates. In order to solve this problem, a new control strategy applying for the actual production was proposed, namely the improved overlay commutation. This strategy ascertained quantitatively the applicable range of the effective suppression of pulsation of pulse width modulation(PWM) method and overlay commutation and the commutation time was determined based on the non-commutation phase current in fixed frequency sampling. It is verified that the improved overlay commutation can effectively reduce commutation torque ripple of brushless DC motor by simulation and comparative analysis of the experimental waveforms and data.更多还原