Flux Vector Drive, AC

A high performance adjustable speed drive for an AC induction motor. By a combination of user-entered motor data and information that the drive senses from the motor, typical speed accuracy of +/-0.5% of base speed, even under changing load conditions, and a speed range of 40:1 or higher is achieved without the use of a feedback device. Used with a motor with encoder, speed accuracy to +/- 0.01% of base speed, and infinite speed range, including full torque at zero speed, is achieved. Typical applications include smaller bull blocks and dead blocks (under 150 HP), take-ups, spoolers and multi-pass draw machines.