A four level inverter based drive with a passive front end

Multilevel inverters are suited for high power drive applications due to their increased voltage capability. A four level inverter is able to synthesize better waveforms and attain higher voltages while reducing the device ratings. While converter device count and kVA are high, a conventional diode bridge rectifier is a low cost multilevel drive solution for the input rectifier if suitable inverter side DC voltage balancing schemes can be devised. This paper investigates the operation of four level rectifier/inverter based drives under commonly used modulation schemes. Link voltage balancing and output voltage capability are analyzed for a four level inverter. Simulation results are presented to verify the link voltage balancing strategy in the absence of any balancing action from the rectifier.

[1]  Thomas A. Lipo,et al.  A four level rectifier-inverter system for drive applications , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[2]  Nobuyuki Matsui,et al.  PWM control and input characteristics of three-phase multi-level AC/DC converter , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[3]  G. Sciutto,et al.  A new multilevel PWM method: a theoretical analysis , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[4]  S. Ogasawara,et al.  A vector control system using a neutral-point-clamped voltage source PWM inverter , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[5]  Hirofumi Akagi,et al.  A Novel Control Scheme for Current-Controlled PWM Inverters , 1986, IEEE Transactions on Industry Applications.

[6]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.

[7]  Jie Zhang.  High performance control of a three-level IGBT inverter fed AC drive , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[8]  Yifan Zhao,et al.  Force Commutated Three Level Boost Type Rectifier , 1993, IEEE Transactions on Industry Applications.

[9]  Yifan Zhao,et al.  Current control of a 3-level rectifier/inverter drive system , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[10]  Thomas A. Lipo,et al.  Rectifier current regulation in four level drives , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[11]  M. Fracchia,et al.  Optimized modulation techniques for the generalized N-level converter , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[12]  Thomas A. Lipo,et al.  Comparison of multilevel inverters for static VAr compensation , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[13]  Thomas A. Lipo,et al.  A new modulation strategy for improved DC bus utilization in hard and soft switched multilevel inverters , 1997, Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066).

[14]  Hirofumi Akagi,et al.  A vector control system using a neutral-point-clamped voltage source PWM inverter , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[15]  J. K. Steinke,et al.  Control strategy for a three phase AC traction drive with three-level GTO PWM inverter , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[16]  Fang Zheng Peng,et al.  A multilevel voltage-source inverter with separate DC sources for static VAr generation , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.