A-C Multiple-Unit Car Motor

A major factor in the development of the 4-motor equipment for use on a-c multiple-unit cars was the design of a suitable truck-mounted traction motor. Numerous electrical and mechanical problems had to be solved. The resultant design differs radically from the conventional axle-hung motor employed in such applications for the past 20 years. Preliminary operating experience indicates advantages comparable to those being realized with similar d-c equipment.