Straight and chopped dc performance data for a Reliance EV-250AT motor with a General Electric EV-1 Controller
This report is intended to supply the electric vehicle manufacturer with performance data on the Reliance EV-150AT shunt wound dc motor and General Electric EV-1 Chopper Controller. Data is provided for both straight and chopped dc input to the motor, at 2 motor temperature levels. Straight and chopped dc testing was done in the armature control mode at full field current for six values of armature voltage and one value of controller voltage. Straight dc testing was also done in the field control mode at full armature voltage for four values of field current. Data results are presented in both tabular and graphical forms. Tabular information includes motor voltage and current input data, motor speed and torque output data, power data and temperature data. Graphical information includes torque-speed, motor power output-speed, torque-current, and efficiency-speed plots under the various operating conditions. The data resulting from this testing shows the speed-torque plots to have the most variance with operating temperature. The maximum motor efficiency is approximately 85% at low operating temperatures in the straight dc mode. When the chopper is utilized, maximum motor efficiency occurs when the chopper duty cycle approaches 100%. At low duty cycles the motor efficiency may be considerably less than the efficiency for straight dc. Chopper efficiency may be assumed to be 95% under all operating conditions. For equal speeds at a given voltage level, the motor operated in the chopped mode develops sightly more torque than it does in the straight dc mode.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center; Eaton Corp., Southfield, MI (USA). Engineering and Research Center
- DOE Contract Number:
- AI01-77CS51044
- OSTI ID:
- 5267286
- Report Number(s):
- DOE/NASA/0123-3; NASA-CR-165447; ERC-TR-8175; ON: DE82011263
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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