Power-Loss Evaluation in CM Active EMI Filters for Bearing Current Suppression

This paper is focused on the analysis of the power losses in a common-mode (CM) active electromagnetic-interference filter for induction-motor drives. The studied filter works according to a feedforward voltage-sensing-voltage-compensating scheme; it performs the compensation of the CM voltage at the motor terminals. In this way, the shaft voltage is dramatically reduced and the resulting bearing currents are practically eliminated. The contributions to the total power losses associated to the active filter are assessed with reference to medium-power induction-motor drives with different rated powers and switching frequencies. The single terms of power losses due to each part of the active filter are accounted for, and their dependence on the motor-drive size is addressed. Furthermore, the influence of the active-filter losses on the drive efficiency is evaluated.

[1]  S. Sangwongwanich,et al.  Design and Implementation of A Hybrid Output EMI Filter for High Frequency Common-Mode Voltage Compensation in PWM Inverters , 2007, 2007 Power Conversion Conference - Nagoya.

[2]  Zhaoan Wang,et al.  A Novel Hybrid Common-Mode EMI Filter With Active Impedance Multiplication , 2011, IEEE Transactions on Industrial Electronics.

[3]  Annette Muetze,et al.  Calculation of Circulating Bearing Currents in Machines of Inverter-Based Drive Systems , 2004, IEEE Transactions on Industrial Electronics.

[4]  W. Roshen,et al.  Magnetic loss in soft ferrites , 2007 .

[5]  M.C. Di Piazza,et al.  Design of Grid-Side Electromagnetic Interference Filters in AC Motor Drives With Motor-Side Common Mode Active Compensation , 2009, IEEE Transactions on Electromagnetic Compatibility.

[6]  C. Choochuan.  A survey of output filter topologies to minimize the impact of PWM inverter waveforms on three-phase AC induction motors , 2005, 2005 International Power Engineering Conference.

[7]  A. Esmaeli,et al.  Investigation and Suppression of Conducted EMI and Shaft Voltage in Induction Motor Drive System , 2006, 2006 6th World Congress on Intelligent Control and Automation.

[8]  Anthony John Moses,et al.  Power loss of non oriented electrical steel under square wave excitation , 2001 .

[9]  Thomas A. Lipo,et al.  Bearing currents and shaft voltages of an induction motor under hard and soft switching inverter excitation , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[10]  Andrea Cavagnino,et al.  Predicting iron losses in soft magnetic materials with arbitrary voltage supply: an engineering approach , 2003 .

[11]  Johann W. Kolar,et al.  Implementation of a Transformerless Common-Mode Active Filter for Offline Converter Systems , 2010, IEEE Transactions on Industrial Electronics.

[12]  Surapong Suwankawin,et al.  Design and Implementation of a Hybrid Output EMI Filter for High-Frequency Common-Mode Voltage Compensation in PWM Inverters , 2009 .

[13]  D. Boroyevich,et al.  Loss Characterization and Calculation of Nanocrystalline Cores for High-Frequency Magnetics Applications , 2007, IEEE Transactions on Power Electronics.

[14]  Yo-Chan Son,et al.  Generalization of active filters for EMI reduction and harmonics compensation , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[15]  Dushan Boroyevich,et al.  Parasitic Effects of Grounding Paths on Common-Mode EMI Filter's Performance in Power Electronics Systems , 2010, IEEE Transactions on Industrial Electronics.

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

[17]  G. Vitale,et al.  Theoretical and experimental evaluation of the power losses in CM active EMI filters , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[18]  J.C. Balda,et al.  Cancellation of common-mode Voltages for induction motor drives using active method , 2006, IEEE Transactions on Energy Conversion.

[19]  Ramesh Oruganti,et al.  Conducted EMI Mitigation Techniques for Switch-Mode Power Converters: A Survey , 2010, IEEE Transactions on Power Electronics.

[20]  Chung-Yuen Won,et al.  Output filter design for conducted EMI reduction of PWM inverter-fed induction motor system , 2001, 4th IEEE International Conference on Power Electronics and Drive Systems. IEEE PEDS 2001 - Indonesia. Proceedings (Cat. No.01TH8594).

[21]  Gianpaolo Vitale,et al.  An Improved Active Common-Mode Voltage Compensation Device for Induction Motor Drives , 2008, IEEE Transactions on Industrial Electronics.

[22]  Seung-Ki Sul,et al.  Generalization of active filters for EMI reduction and harmonics compensation , 2003 .

[23]  Hirofumi Akagi,et al.  An active circuit for cancellation of common-mode voltage generated by a PWM inverter , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[24]  Pertti Silventoinen,et al.  A New Passive Hybrid Air-Core Foil Filter for Modern Power Drives , 2011, IEEE Transactions on Industrial Electronics.

[25]  Annette Muetze,et al.  Practical Rules for Assessment of Inverter-Induced Bearing Currents in Inverter-Fed AC Motors up to 500 kW , 2007, IEEE Transactions on Industrial Electronics.

[26]  Dianguo Xu,et al.  A Novel Inverter-Output Passive Filter for Reducing Both Differential- and Common-Mode $dv/dt$ at the Motor Terminals in PWM Drive Systems , 2007, IEEE Transactions on Industrial Electronics.