Why a Standard for Chopper Controlled DC Motors for Electric Vehicles?

Chopper controlled DC motors, because of the high harmonic content of the current require special consideration from the standpoint of test procedures, instrumentation and specifying test results and motor parameters. IEEE Std #113 “Test Code for DC Machines” does not address these problems. This paper discusses the problem areas and suggests items to be included in a supplementary standard to use with IEEE #113.