High-Power Machine Drive, Using Nonredundant 27-Level Inverters and Active Front End Rectifiers

A nonredundant 27-level inverter using ldquoHrdquo converters is being analyzed for high power machine drive applications. The main advantage of this kind of converter is the minimum harmonic distortion obtained at the machine side. The drawbacks are the large number of isolated dc power supplies required for each one of the three stages of the multistage converter. In this paper this problem has been overcome in two ways: 1) by using independent windings for each phase of the motor and 2) by using independent input transformers. Special configurations and combinations of diode rectifiers and active front end rectifiers for one of the stages of the drive are used to eliminate input harmonics. The topology can also keep high power factor at the input terminals. Simulation results are shown and some experiments with small three-stage prototype are displayed. The control of this multiconverter is being implemented using DSP controllers, which give flexibility to the system.

[1]  Fang Zheng Peng,et al.  A generalized multilevel inverter topology with self voltage balancing , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[2]  Keiju Matsui,et al.  Application of parallel connected NPC-PWM inverters with multilevel modulation for AC motor drive , 2000 .

[3]  Seung-Ki Sul,et al.  Unified voltage modulation technique for real time three-phase power conversion , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[4]  Joachim Holtz,et al.  Fast current trajectory tracking control based on synchronous optimal pulsewidth modulation , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

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

[6]  Juan Dixon,et al.  A clean four-quadrant sinusoidal power rectifier using multistage converters for subway applications , 2005, IEEE Transactions on Industrial Electronics.

[7]  Bimal K. Bose,et al.  Power electronics and motion control-technology status and recent trends , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[8]  L. Moran,et al.  Multilevel inverter, based on multi-stage connection of three-level converters scaled in power of three , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[9]  J. Dixon,et al.  High-level multistep inverter optimization using a minimum number of power transistors , 2006, IEEE Transactions on Power Electronics.

[10]  Hirofumi Akagi.  The state-of-the-art of power electronics in Japan , 1998 .

[11]  Samir Kouro,et al.  Modeling and analysis of common-mode voltages generated in medium voltage PWM-CSI drives , 2003 .