Motor Designed To Aid Environment

This motor uses novel windings and control electronics to produce substantially greater start-up and continuous torque than conventional ac induction motors of the same frame size and heating limits. In tests, the two-pole TEFC Chorus motor with a 215T frame has provided 41.5 ft.-lb. of peak torque over twelve minutes of operation versus 31.3 ft.-lb. from a 3-phase ac induction motor of the same size, with the same temperature limits. Over short periods of 30 seconds, Chorus motors can produce 3-5 times the peak torque of comparable conventional motors. Continuous torque tests show a Chorus motor running at 1,200 rpm providing 22 ft.-lb. of torque against only 14.6 ft.-lb. for a comparable ac induction motor using square waves and the same power control electronics and thermal limits. The Chorus motor is designed for both traction and continuous applications such as automation, elevators, electric vehicles, hoists, conveyors, and fans. The motor comes in sizes ranging from fractional horsepower to megawatt scale units.