CONTROL METHOD FOR PWM CONVERTER

摘要

PURPOSE:To reduce the equivalent disturbance current by restraining a main transformer from being divided in order to reduce the harmonics and to reduce the weight of a vehicle-mounted power supply by reducing the weight of the main transformer and decreasing the total number of elements in converters. CONSTITUTION:Vehicles, each mounting a power supply and composing a train, are divided into a plurality of groups and the modulation wave being employed in PWM control for all PWM converters in same composition of train is in- phase with a power supply voltage. A predetermined phase difference is set between the groups for the carrier being employed in PWM control of the PWM converters.