Fault-tolerant operating analysis of a quad-inverter multiphase multilevel AC motor drive

This paper investigates a new fault-tolerant strategy of a multi-phase multi-level ac motor drive. The proposed approach is based on four conventional 2-level three-phase voltage source inverters (VSIs) supplying the open-end windings of a dual three-phase motor (asymmetric six-phase machine), quadrupling the power capability of a single VSI with given voltage and current ratings. The developed fault-tolerant control algorithm is able to generate multi-level voltage waveforms, equivalent to the ones of a 3-level inverter, and to share the total motor power among the four dc sources within each switching period. The investigated ac motor drive has been numerically implemented, under healthy and for three degraded modes of the system, are given to prove the effectiveness of the whole strategy.

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

[2]  Gérard-André Capolino,et al.  Advances in Diagnostic Techniques for Induction Machines , 2008, IEEE Transactions on Industrial Electronics.

[3]  G Grandi,et al.  Multi-phase multi-level AC motor drive based on four three-phase two-level inverters , 2010, SPEEDAM 2010.

[4]  D. Casadei,et al.  Multilevel Operation and Input Power Balancing for a Dual Two-Level Inverter with Insulated DC Sources , 2008, IEEE Transactions on Industry Applications.

[5]  Emil Levi,et al.  Multiphase Electric Machines for Variable-Speed Applications , 2008, IEEE Transactions on Industrial Electronics.

[6]  F. Profumo,et al.  Dual-Source Fed Multi-phase Induction Motor Drive for Fuel Cell Vehicles: Topology and Control , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[7]  K. Gopakumar,et al.  Three-Level Inverter Scheme With Common Mode Voltage Elimination and DC Link Capacitor Voltage Balancing for an Open-End Winding Induction Motor Drive , 2006, IEEE Transactions on Power Electronics.

[8]  Peter Tavner,et al.  An industry-based survey of reliability in power electronic converters , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[9]  Peter Tavner,et al.  Condition Monitoring for Device Reliability in Power Electronic Converters: A Review , 2010, IEEE Transactions on Power Electronics.

[10]  A. Tani,et al.  Space Vector Modulation of a Six-Phase VSI based on three-phase decomposition , 2008, 2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion.

[11]  Yifan Zhao,et al.  Space vector PWM control of dual three phase induction machine using vector space decomposition , 1994 .

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

[13]  A.H. Bonnett,et al.  Increased Efficiency Versus Increased Reliability , 2008, IEEE Industry Applications Magazine.

[14]  Kwanghee Nam,et al.  Dual-inverter control strategy for high-speed operation of EV induction motors , 2004, IEEE Transactions on Industrial Electronics.

[15]  B. Singh,et al.  A review of stator fault monitoring techniques of induction motors , 2005, IEEE Transactions on Energy Conversion.

[16]  Takao Kawabata,et al.  High-efficiency and low acoustic noise drive system using open-winding AC motor and two space-vector-modulated inverters , 2002, IEEE Trans. Ind. Electron..

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

[18]  G. Oriti,et al.  A Comparison of Redundant Inverter Topologies to Improve Voltage Source Inverter Reliability , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

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