Generation and suppression of conducted EMI from inverter-fed motor drives

This paper focuses on a systematic analysis of the conducted electromagnetic interference (EMI) from an inverter-fed motor drive system. It proposes a theory to explain how the conducted EMI is generated. The theory states that the EMI can be produced from the system by two different mechanisms: parasitic capacitive coupling and inductive load current switching. Each of the EMI mechanisms is discussed in detail. Suppression methods are also suggested to help effectively reduce the EMI emission. Validation of the theory and suppression methods are then performed experimentally based on a brushless PM motor drive.

[1]  Thomas A. Lipo,et al.  Source of induction motor bearing currents caused by PWM inverters , 1996 .

[2]  A. Wallace,et al.  An evaluation of mitigation techniques for bearing currents, EMI and over-voltages in ASD applications , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[3]  Alfio Consoli,et al.  Reduction of common mode currents in PWM inverter motor drives , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[4]  Gary L. Skibinski,et al.  Generation, control and regulation of EMI from AC drives , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[5]  Thomas A. Lipo,et al.  Improvements in EMI performance of inverter-fed motor drives , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[6]  Y. Murai,et al.  Leakage current reduction for a high-frequency carrier inverter feeding an induction motor , 1992 .

[7]  Thomas A. Lipo,et al.  Circulating type motor bearing current in inverter drives , 1998 .

[8]  T. Lipo,et al.  Elimination of common mode voltage in three phase sinusoidal power converters , 1996, PESC Record. 27th Annual IEEE Power Electronics Specialists Conference.