PWM電機驅(qū)動系統(tǒng)傳導共模EMI抑制技術(shù)的研究現(xiàn)狀

現(xiàn)代工業(yè)領(lǐng)域中廣泛采用的PwM電機驅(qū)動系統(tǒng)，因功率變換器調(diào)制策略的原因，將不可避免地形成傳導共模EMI，并且其危害程度要遠大于差模EMI的危害程度，是EMI問題的研究熱點。詳細分析了PwM電機驅(qū)動系統(tǒng)傳導共模EMl抑制技術(shù)的研究現(xiàn)狀，并在此基礎(chǔ)上給出了典型方法存在的不足，及抑制技術(shù)的發(fā)展趨勢。
關(guān)鍵詞：傳導共模EMI；PWM功率變換器；EMI發(fā)射強度；EMI傳播途徑；EMI濾波器

Abstmct：PWM motor drive system is widely applied to industrial domai兒However，owing to power converter adopts pulse width modulation，which inevitably causes conducted common mode EMI． Hamful degree of common mode EMI is much greater than that of differential mode EMI，so common mode interference is the research focus of EMI．The study status arld development trend of conducted common mode EMI suppression technology of PWM motor drive system was analyzed and the deficiency of typical suppression method was
presented．