A Reconfigurable Load Emulator for Multiple Quadrant Motor Drives

摘要

Motor drives are required to be tested under various loading conditions so as to ascertain the effectiveness of their speed control schemes and the ability of the machine to withstand sudden load changes. This paper presents the modeling and design of a reconfigurable load emulator which can apply typical load torque profiles on the shaft of the motor under test. The proposed system uses a current-controlled dc chopper driven dc machine, and does not require torque measurement. Simulation tests confirm the ability of the load emulator to produce commonly encountered torque-speed characteristics and bidirectional step load profiles for multiple quadrant operation.