CHOPPER CONTROL UNIT

摘要

There is disclosed a programmed microprocessor control apparatus and method for transit vehicle electric motor through operation of a chopper apparatus. The microprocessor program establishes a boost signal for every program cycle of operation, including an ON control pulse positioned within the boost signal. The chopper operation monitors the provision of the boost signal to maintain the operation of the chopper motor control apparatus as determined by keeping the power supply line switch closed.