Asymptotic Time Domain Evaluation of a Multilevel Multiphase PWM Converter Voltage Quality

Voltage total harmonic distortion and quadratic voltage ripple criteria are accepted figures of merit of a multilevel pulse width modulation (PWM) converter voltage quality. The dominating frequency domain approach does not deliver simple closed-form expressions and practically requires accounting up to 40-50 switching harmonics. Assuming infinitely high switching frequency, suggested time domain approach to a multilevel multiphase PWM voltage quality evaluation provides closed-form piece-wise analytical solutions. These simple formulas clearly reveal the dependence on modulation index for arbitrary voltage level and odd phase numbers. The results are applicable to any type of multilevel converters (including interleaved, open winding and other) operated with nearest level/nearest space vector modulation and relatively high switching frequency.

[1]  S. Busquets-Monge,et al.  Pulsewidth Modulations for the Comprehensive Capacitor Voltage Balance of $n$-Level Three-Leg Diode-Clamped Converters , 2009, IEEE Transactions on Power Electronics.

[2]  Rainer Marquardt,et al.  An innovative modular multilevel converter topology suitable for a wide power range , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[3]  J.M. Carrasco,et al.  Generalized analytical approach of the calculation of the harmonic effects of single phase multilevel PWM inverters , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[4]  Marc Hiller,et al.  Modulation, Losses, and Semiconductor Requirements of Modular Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[5]  Alex Q. Huang,et al.  Multilevel active NPC converter for filterless grid-connection for large wind turbines , 2009 .

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

[7]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.

[8]  M. Jones,et al.  Analysis of Output Current Ripple rms in Multiphase Drives Using Space Vector Approach , 2009, IEEE Transactions on Power Electronics.

[9]  Johann W. Kolar,et al.  High efficiency drive system with 3-level T-type inverter , 2011, Proceedings of the 2011 14th European Conference on Power Electronics and Applications.

[10]  Mariusz Malinowski,et al.  A Survey on Cascaded Multilevel Inverters , 2010, IEEE Transactions on Industrial Electronics.

[11]  Marcelo A. Pérez,et al.  Multilevel Converters: An Enabling Technology for High-Power Applications , 2009, Proceedings of the IEEE.

[12]  Ruifang Liu,et al.  Modeling of Iron Losses of Electrical Machines and Transformers Fed by PWM Inverters , 2007, 2007 IEEE Power Engineering Society General Meeting.

[13]  S. Halasz,et al.  PWM strategies of multi-phase inverters , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[14]  Bin Wu,et al.  Recent Advances and Industrial Applications of Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[15]  José R. Rodríguez,et al.  A Survey on Neutral-Point-Clamped Inverters , 2010, IEEE Transactions on Industrial Electronics.

[16]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..

[17]  Katsumi Yamazaki,et al.  Iron Loss Model for Rotating Machines Using Direct Eddy Current Analysis in Electrical Steel Sheets , 2010, IEEE Transactions on Energy Conversion.

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

[19]  L.G. Franquelo,et al.  The age of multilevel converters arrives , 2008, IEEE Industrial Electronics Magazine.

[20]  Baoming Ge,et al.  Medium-Voltage Multilevel Converters—State of the Art, Challenges, and Requirements in Industrial Applications , 2010, IEEE Transactions on Industrial Electronics.

[21]  Bin Wu,et al.  Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives , 2007, IEEE Transactions on Industrial Electronics.