Abstract
The application of the Presidents' Conference Committee (PCC) car in rapid transit service led to the development of a new control known as type MCM. This is primarily an all-cam control system comprising two motor-operated controllers. One controller, called the circuit controller, establishes various main and control circuits for power, breaking cushioning, field shunting, and reversing. A second similar controller, called the resistance controller, varies the main motor circuit resistance to hold rate of accelerating or braking as desired.
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Schedule a callMore From: Transactions of the American Institute of Electrical Engineers
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