PWM INVERTER CONTROL DEVICE AND RAILROAD VEHICLE PROVIDED WITH PWM INVERTER CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide harmonic suppressing means which can modulate an output of a PWM pulse from an asynchronous PWM toward a synchronization PWM and suppresses an electromagnetic noise generated from an electric motor in a railroad vehicle.;SOLUTION: A PWM inverter control device 9 comprises: a speed detection part 101; a vector control calculation part 102; a PWM control calculation part 103; a carrier frequency calculation part 104; a modulation rate control amount generation part 105. The PWM inverter control device 9 adds a modulation rate control amount ΔVc which is characterized in that a value is made to be changed, and a sign is made to be reversed for every half cycle of a carrier on the basis of a table in which an average value ≒0 discontinuously and irregularly to a modulation rate reference value Vc0, and inputs it into the PWM control calculating part.;COPYRIGHT: (C)2012,JPO&INPIT