| 摘要 |
The IGBT drive signal to a power converter comprising power semiconductor elements, such as IGBT, is supplied by a PWM controller which performs pulse width modulation of voltage references. A DC offset voltage Vd is generated by a DC offset generator in accordance with the output frequency f and output phase theta, and this voltage Vd and the voltage references are added together by adders 22-24, and supplied to the PWM controller to form IGBT drive signals. Thereby, it is possible to reduce the amount of loss generated by the power semiconductor elements used in the control device of a power converter for converting DC voltage to AC voltage, or AC voltage to DC voltage.
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