摘要
提出了一种应用于交流斩波器的新型谐波抑制脉宽调制技术。它通过开环方式,对交流斩波器的输出占空比进行实时调节。和已有的恒定占空比控制相比,实现了对交流输入电压中低次谐波的完全消除,并且不要求计算相应的谐波分量,这简化了控制策略,同时显著降低了系统对控制器带宽的要求。文中分析和推导了调制函数的解析式,并给出了详细的实现方案。理论分析和仿真表明其在电压谐波消除中的优越性能。2kVA 样机的实验结果验证了该调制技术对交流系统侧谐波电压具有良好的抑制能力。
An advanced harmonic elimination pulse widthmodulation (PWM) technique for ac choppers is proposed.Through open-loop operation, it regulates the output pulsewidth dynamically. Compared with previous constant dutycycle control, the new PWM technique can eliminate all loworder harmonic voltage contained in ac mains. And harmonicfrequency proceeding is not required, which simplifies controlscheme and reduces greatly the demand for bandwidth ofcontroller. Operation principles and realization of the proposedPWM technique are discussed. Theoretical analysis andsimulation results indicate its superiority over existing constantduty cycle control. Experimental results obtained from a 2kVAprototype show that it has good performance in harmonicvoltage suppression.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第5期68-73,共6页
Proceedings of the CSEE
