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IN THREE-PHASE PW INVERTER

Shigeyuki Funabiki, Yuuichirou Sawada

Abstract

A new PWM technique is proposed for a three- phase sin-wave PWM inverter. The pulse width is decided to produce a sin-wave output voltage by numerical calculation based on a geometrical technique. The accuracy of output voltage and the harmonics in an output voltage waveform are discussed as compared with the conventional triangulation method. Further, a modified method is introduced for a PWM inverter with fluctuating input voltage. The validity of the proposed method for the PWM inverter is verified in an experiment using a microprocessor-based control system.

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Available abstract

Key concepts: Inverter, Pulse-width modulation, Waveform, Harmonics, Voltage, Control theory (sociology), Three-phase, Computer science