Compensation of Nonlinearities in Diode-Clamped Multilevel Converters

The application of multilevel converters for exciting permanent-magnet machines with low-phase inductance to dc-link voltage ratios facilitates a reduction in high-frequency switching harmonics. However, converter nonlinearities and, in-particular, on-state device voltage drops, create additional low-frequency harmonics. This paper therefore proposes a generic compensation scheme to accommodate the effects of such converter nonlinearities and, in doing so, improve the harmonic quality of the machine phase currents. Experimental results gathered from a prototype five-level diode-clamped converter validate the benefits of the proposed scheme by showing quantitative reductions in low-frequency harmonics.

[1]  D. Boroyevich,et al.  Voltage-balancing strategies for diode-clamped multilevel converters , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[2]  Jorge Pontt,et al.  A new modulation method to reduce common-mode voltages in multilevel inverters , 2004, IEEE Transactions on Industrial Electronics.

[3]  T.A. Lipo,et al.  On-line dead time compensation technique for open-loop PWM-VSI drives , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[4]  D.G. Xu,et al.  A novel strategy of dead-time compensation for PWM voltage-source inverter , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[5]  Lazhar Ben-Brahim,et al.  On the compensation of dead time and zero-current crossing for a PWM-inverter-controlled AC servo drive , 2004, IEEE Transactions on Industrial Electronics.

[6]  Seung-Gi Jeong,et al.  The analysis and compensation of dead-time effects in PWM inverters , 1991 .

[7]  Hyun-Soo Kim,et al.  On-line dead-time compensation method using disturbance observer , 2003 .

[8]  Cursino Brandão Jacobina,et al.  Improved Dead-Time Compensation for Sinusoidal PWM Inverters Operating at High Switching Frequencies , 2007, IEEE Transactions on Industrial Electronics.

[9]  D.A. Stone,et al.  A back to back multilevel converter for driving low inductance brushless AC machines , 2007, 2007 European Conference on Power Electronics and Applications.

[10]  Jeffrey Ewanchuk,et al.  Performance of a High Speed Motor Drive System Using a Novel Multi-Level Inverter Topology , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[11]  Iustin Radu Bojoi,et al.  Self-Commissioning Algorithm for Inverter Non-Linearity Compensation in Sensorless Induction Motor Drives , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[12]  Myung-Joong Youn,et al.  New Voltage Distortion Observer of PWM VSI for PMSM , 2005, IEEE Trans. Ind. Electron..

[13]  Russel J. Kerkman,et al.  Pulse based dead time compensator for PWM voltage inverters , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[14]  M. Renge,et al.  Five-Level Diode Clamped Inverter to EliminateCommon Mode Voltage and Reduce $dv/dt$ inMedium Voltage Rating Induction Motor Drives , 2008, IEEE Transactions on Power Electronics.

[15]  Dongsheng Zhou,et al.  Dead-time effect and compensations of three level neutral point clamp inverters for high performance drive applications , 1997, Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066).

[16]  Yoshihiro Murai,et al.  Waveform Distortion and Correction Circuit for PWM Inverters with Switching Lag-Times , 1987, IEEE Transactions on Industry Applications.

[17]  Reza Iravani,et al.  A Space Vector Modulation Strategy for a Back-to-Back Five-Level HVDC Converter System , 2009, IEEE Transactions on Industrial Electronics.

[18]  D. Boroyevich,et al.  Efficient Space-Vector Modulation Algorithm for Multilevel Converters with Low Switching Frequencies in the Devices , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[19]  T. Funabashi,et al.  Adaptive Dead-Time Compensation Strategy for Permanent Magnet Synchronous Motor Drive , 2007, IEEE Transactions on Energy Conversion.

[20]  Seung-Ki Sul,et al.  Inverter output voltage synthesis using novel dead time compensation , 1996 .

[21]  Mario Marchesoni,et al.  Diode-clamped multilevel converters: a practicable way to balance DC-link voltages , 2002, IEEE Trans. Ind. Electron..