Power conversion device, motor drive control device including the power conversion device, blower and compressor including the motor drive control device, and air conditioner including the blower or compressor

摘要

In a configuration having a plurality of chopper circuit portions, to obtain a power conversion device capable of enhancing the suppression effect of harmonic currents with a simpler configuration regardless of the operation mode. A switching control means 10 for controlling each switching element constituting a plurality of chopper circuit sections, a rectified voltage detection means, a bus voltage detection means, and a bus current detection means, and the switching control means 10 includes a bus voltage and On-duty calculation means 20 for calculating a reference on-duty of each drive pulse for a plurality of switching elements based on the bus current, and a reference so that the amount of change in each reactor current is substantially equal based on the bus current. On-duty correction means 23 that corrects the on-duty and outputs the on-duty of each drive pulse, and a drive pulse generation means 24 that generates each drive pulse based on each on-duty.