POWER CONVERTER SYSTEM, ELECTRIC ENGINE STARTUP SYSTEM, CONTROL METHOD OF AC MOTOR, AND CONTROL METHOD OF PWM RECTIFIER

摘要

PPROBLEM TO BE SOLVED: To provide a system and a method for controlling ripples in a DC link between an active rectifier and an inverter. PSOLUTION: An active rectifier control part 16 makes ripple current to be minimum by relating DC link voltage generated by the active rectifier 14 to speed of an AC motor to which a converter supplies power. On the other side, the active rectifier control part makes ripple current to be minimum by using a harmonic compensator for deciding DC link voltage generated by the active rectifier. On the other side, the active rectifier control part makes ripple current to be minimum by tuning a switching frequency of the active rectifier based on a switching frequency used in a PWM inverter control part. PCOPYRIGHT: (C)2007,JPO&INPIT