Determination of flux density produced by multilevel inverters in CM voltage filter

Purpose – The purpose of this paper is to evaluate the conditions in which a saturation of the common mode (CM) choke might appear to be essential for proper design of the CM voltage filters. This paper presents a method for the determination of a CM choke flux density produced by multilevel inverters with carrier‐based modulations.Design/methodology/approach – The proposed combination of secant and tangent methods allows efficient and high‐resolution determination of the CM voltage waveforms produced at the output of the multilevel inverters with commonly used carrier‐based modulations.Findings – The presented results show that the application of a five‐level inverter with specific modulation causes a decrease of the maximum flux density, down to 15 per cent of the maximum level of the flux density reached in a two‐level inverter. The proposed, dedicated approximation method provides an accuracy of the root estimation better by about three orders for a comparable number of the function calls in compariso...

[1]  H. Akagi,et al.  Attenuation of Conducted EMI Emissions From an Inverter-Driven Motor , 2008, IEEE Transactions on Power Electronics.

[2]  Thomas A. Lipo,et al.  Pulse Width Modulation for Power Converters: Principles and Practice , 2003 .

[3]  T.A. Lipo,et al.  Implementation and control of distributed PWM cascaded multilevel inverters with minimal harmonic distortion and common-mode voltage , 2005, IEEE Transactions on Power Electronics.

[4]  Holmes,et al.  Pulse width modulation for power converters , 2003 .

[5]  R.W. De Doncker,et al.  Typical impulses in power electronics and their EMI characteristics , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[6]  Michael A. Malcolm,et al.  Computer methods for mathematical computations , 1977 .

[7]  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.

[8]  Grzegorz Benysek,et al.  Multilevel voltage source power quality conditioner , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[9]  Grzegorz Benysek,et al.  Power Electronics in Smart Electrical Energy Networks , 2010 .

[10]  H. Akagi,et al.  A Passive EMI Filter for Eliminating Both Bearing Current and Ground Leakage Current From an Inverter-Driven Motor , 2005, IEEE Transactions on Power Electronics.

[11]  A. Binder,et al.  Scaling Effects of Inverter-Induced Bearing Currents in AC Machines , 2008, IEEE Transactions on Industry Applications.

[12]  Jacek Bojarski,et al.  Statistical approach to discharge bearing currents , 2010 .

[13]  H. Akagi,et al.  Design and performance of a passive EMI filter for use with a voltage-source PWM inverter having sinusoidal output voltage and zero common-mode voltage , 2004, IEEE Transactions on Power Electronics.

[14]  H. Akagi,et al.  A Specific Filter for Eliminating High-Frequency Leakage Current From the Grounded Heat Sink in a Motor Drive With an Active Front End , 2008, IEEE Transactions on Power Electronics.

[15]  F. Blaabjerg,et al.  An EMC evaluation of the use of unshielded motor cables in AC adjustable speed drive applications , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[16]  R. Strzelecki,et al.  Series Passive Compensation of Common Mode Voltage in Multilevel Inverter Drives , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.