CONVERTER CONTROL METHOD

摘要

It is possible to control a DC voltage in accordance with fluctuation of a power source voltage without requiring detection of an effective power source voltage value. A PI control unit (702) performs PI control for a difference (?Vdc) between a DC voltage instruction (Vdc*) and a DC voltage (Vdc) and outputs a d-axis current instruction value (Id*). A PI control unit (704) performs PI control for a difference (?Id) between a d-axis current instruction value (Id*) and a d-axis current (Id) and outputs a d-axis voltage instruction value (Vd*). A PWM control unit (709) outputs a switching control signal (G1) which controls a converter switching operation according to the d-axis voltage instruction value (Vd*) and a q-axis voltage instruction value (Vq*). A DC voltage instruction (Vdc*) is generated by a voltage instruction calculation unit (710) according to the d-axis voltage instruction value (Vd*).