CONTROL DEVICE FOR POWER CONVERSION DEVICE, POWER CONVERSION DEVICE, MOTOR DRIVE SYSTEM USING THEM, COMPRESSOR DRIVE SYSTEM, GAS TURBIN

摘要

A control device (7 A) for a power conversion device that controls the power conversion device in a system driven by a power conversion device (3 A) that outputs AC power by an electric motor (5), the control device The apparatus (7A) includes control pulse generators (70-73) for generating control pulses of the power converter (3A), pulse signal output from the control pulse generator and rotational speed information () of the motor, And a negative phase creating section (74) for inputting the pulse signal of the control pulse generating section and generating an inverted signal of the output signal of the control pulse generating section, wherein a half cycle pulse signal And the pulse signal of the next half cycle in one cycle of the voltage generated by the negative phase creating section are symmetrical in the positive / negative relationship of the voltage.