Experimental investigation of fault-tolerant control strategies for quad-inverter converters

Fault-tolerant control strategies for quad-inverter based multiphase-multilevel converters are proposed and experimentally verified in this paper. Explicitly, the conversion scheme consists of four standard 2-level three-phase voltage source inverters (VSIs), able to supply a dual three-phase induction motor in open-end stator winding configuration (asymmetric six-phase machine), quadrupling the utility power of a single VSI within given voltage and current ratings. The developed modulation scheme has the capability to generate multilevel output voltage waveforms in healthy conditions, equivalent to the one of a 3-level VSI, and to share the total motor power among the four dc sources in each switching cycle. This sharing potentiality is investigated under post-fault operating conditions, when one VSI completely insulated due to a severe failure on it. In such circumstances, the quad-inverter system can perform with reduced power rating by a proper modulation of the remaining three healthy VSIs. The complete multi-phase-multilevel conversion system with the proposed control algorithm under healthy and post-fault operating conditions has been verified by experimental implementation in open-loop control aspect using two dsp TMS320-F2812 processors with two three-phase passive loads in open-end configuration.

[1]  Padmanaban Sanjeevikumar,et al.  Preliminary hardware implementation of a six-phase quad-inverter induction motor drive , 2011, Proceedings of the 2011 14th European Conference on Power Electronics and Applications.

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

[3]  Dawei Xiang,et al.  An Industry-Based Survey of Reliability in Power Electronic Converters , 2011, IEEE Transactions on Industry Applications.

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

[5]  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.

[6]  Y. Gritli,et al.  Fault-tolerant operating analysis of a quad-inverter multiphase multilevel AC motor drive , 2011, 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics & Drives.

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

[8]  Gabriele Grandi,et al.  Dual inverter space vector modulation with power balancing capability , 2009, IEEE EUROCON 2009.

[9]  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.

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

[12]  Y. Gritli,et al.  Fault-tolerant control strategies for quad inverter induction motor drives with one failed inverter , 2012, 2012 XXth International Conference on Electrical Machines.

[13]  Edison Roberto Cabral da Silva,et al.  Fault-tolerant voltage-fed PWM inverter AC motor drive systems , 2004, IEEE Transactions on Industrial Electronics.

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

[15]  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.

[16]  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.

[17]  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..

[18]  Giovanni Serra,et al.  General Analysis of Multi-Phase Systems Based on Space Vector Approach , 2006, 2006 12th International Power Electronics and Motion Control Conference.

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

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

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

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

[23]  Silverio Bolognani,et al.  Experimental fault-tolerant control of a PMSM drive , 1998, IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200).

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

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