Dynamic overmodulation characteristics of triangle intersection PWM methods

In this paper, the dynamic overmodulation characteristics of current regulated carrier-based high-performance PWM-VSI drives are investigated. Dynamic and steady state overmodulation operating modes are clearly distinguished, and the requirements for obtaining high performance in each mode are shown to be significantly different. Dynamic overmodulation characteristics of the popular triangle intersection PWM methods are modeled and shown to be unique for each method. The study reveals that space vector PWM (SVPWM) exhibits a minimum voltage magnitude error characteristic. It also indicates all the advanced triangle intersection PWM methods including SVPWM have limited dynamic overmodulation performance. To enhance the performance, an algorithm with superior performance is adapted from the direct digital PWM approach. Detailed induction motor drive simulations illustrate the deficiency of popular triangle intersection PWM methods and the performance gained with the new dynamic overmodulation algorithm.

[1]  G. B. Indri,et al.  Improvement of pulse width modulation techniques , 1975 .

[2]  S. R. Bowes,et al.  Suboptimal switching strategies for microprocessor-controlled PWM inverter drives , 1985 .

[3]  Thomas A. Lipo,et al.  Operation of Naturally Sampled Current Regulators in the Transition Mode , 1987, IEEE Transactions on Industry Applications.

[4]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.

[5]  K. Taniguchi,et al.  PWM technique for power MOSFET inverter , 1988 .

[6]  A. Nabae,et al.  A novel PWM scheme of voltage source inverters based on space vector theory , 1990 .

[7]  Robert D. Lorenz,et al.  One-step optimal space vector PWM current regulation using a neural network , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[8]  J. Holtz,et al.  Pulsewidth modulation for electronic power conversion , 1994, Proc. IEEE.

[9]  Ahmet M. Hava,et al.  Simple analytical and graphical tools for carrier based PWM methods , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[10]  Ahmet M. Hava,et al.  Carrier-based PWM-VSI overmodulation strategies: analysis, comparison, and design , 1998 .