基于模型预测变开关频率PWM的EMI主动抑制技术

Active EMI Suppression Technologies Based on Model Predictive Variable Switching Frequency PWM

脉宽调制(PWM)是电力电子技术的重要基础领域,是当前电力电子变换器实现交直流电能变换与控制的主要方式。模型预测变开关频率PWM技术是经典脉宽调制技术理论在电力电子变换器领域的重要发展,也是扩频调制技术的一个新兴分支,融合了微秒级时间尺度的开关纹波时域预测模型,可主动控制PWM开关频率自由度,在实现电磁干扰主动抑制的同时,综合权衡了电力电子变换器开关纹波、开关损耗等重要因素。文章综述了基于模型预测变开关频率PWM的传导电磁干扰主动抑制技术的研究进展,回顾了基于不同预测模型的变开关频率PWM技术的实现方法,探讨了模型预测变开关频率PWM技术应用过程中的关键共性问题,进而展望了此技术在电力电子变换器领域的发展方向与机遇。

Pulse width modulation(PWM)technology is an important basic field in the power electronics technology.Model predictive variable switching frequency PWM is an important progress of PWM theory in the field of power electronic converter and a new branch of spread spectrum modulation to reduce the conducted EMI peak noise,which incorporates the time-domain switching ripple prediction model ofμs time scale,and actively controls the switching frequency freedom of PWM,realizing active conducted EMI suppression and weighing a comprehensive balance of switching ripple and switching losses in power electronic converters.This paper mainly summarizes the development of conducted EMI suppression technologies based on model predictive variable switching frequency PWM,and reviews the realization method of variable switching frequency PWM technology based on different prediction models,and discusses the key common problems in the application process of model predictive variable switching frequency PWM technology.Finally,the future development and opportunity of model predictive variable switching frequency PWM technology in power electronic converter field are prospected.