電力変換器の制御装置

摘要

PROBLEM TO BE SOLVED: To provide a control device of a power converter capable of suppressing a leakage current without adding a circuit for suppressing a leakage current.;SOLUTION: The control device of a power converter includes: a rectifier PWM control unit 19; an inverter PWM control unit 25; and a zero-phase modulation deviation correction unit 40. The zero-phase modulation deviation correction unit 40 generates a corrected rectifier zero-phase modulation signal Vz_rec* and a corrected inverter zero-phase modulation signal Vz_inv* that result in the same zero-phase modulation signal on the basis of a rectifier zero-phase modulation signal Vz_rec and an inverter zero-phase modulation signal Vz_inv. A rectifier PWM modulation unit 34a performs PWM control on the basis of a rectifier PWM modulation signal obtained by adding the corrected rectifier zero-phase modulation signal Vz_rec* to a voltage command value Vref_rec of a rectifier. An inverter PWM modulation unit 34b performs PWM control on the basis of an inverter PWM modulation signal obtained by adding the corrected inverter zero-phase modulation signal Vz_inv* to a voltage command value Vref_inv of an inverter.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT