Kabushiki Kaisha Yaskawa Denki

Hiroshi Suetake

Yoichi Yamamoto

Masashiro Tanaka

Shigekazu Nakamura

A simple and accurate dead time dispersion measurement method and a voltage source inverter control method that can prevent the occurrence of an unstable phenomenon are provided. The control method controls a voltage source inverter of a PWM system, which includes a power semiconductor device controlling a level of a voltage, a frequency and a phase. According to the control method, before operation, voltage error information for each polarity of respective phase currents of the inverter is stored. And during the operation, the voltage error information is read to compensate for a voltage instruction value or a pulse width of a PWM instruction signal, so that a voltage error can be corrected.

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Fukuoka, Japan

Hiroshi Suetake