摘要
提出了基于小波分析的无刷直流电机的PWM波形生成方法。在对电机的电流数据进行采样以后,利用离散小波变换分析和逆变换来分析电机电流得到高频分量,分析了PWM与生成的高频分量的关系。并利用高频分量抑止电流的谐波分量。构造了一个逆变换器来实现对高频分量的抑止效果。仿真结果看来,这种控制方法很好的抑止了电机的电流脉动,使之更加接近于方波,并且电机转速也相应的更加趋于平稳。
The paper presents a PWM strategy based on wavelet analysis for BLDCM. The detailed components are acquired by wavelet analysis and inverse transform on the current of the motor. The paper analyzes the relationship between PWM and acquired high-frequency components. An inverter is constructed to improve the harmonic spectrum of the current by damping the high-frequency components using these components. The simulation shows that the approach in the paper can decrease current ripple so well that the current is almost square wave and that the speed of the motor is more stable correspondingly.
出处
《系统仿真学报》
CAS
CSCD
2004年第8期1857-1860,共4页
Journal of System Simulation
基金
安徽省"十五"攻关项目资助(01012010)
