Four-quadrant brushless motor controller

Burlingame, Calif.— 4-Q-EC provides electronic commutation and speed control for three-phase brushless dc motors. Being a four-quadrant controller means speed control is maintained whether accelerating or braking in both CW or CCW directions. Commutation and velocity feedback is achieved via Hall effect sensors and an encoder respectively. Speed and direction are determined by external signal voltage or a potentiometer. Additional inputs are designed to set current limit or to disable power using TTL, CMOS, or a switch. Maxon Precision Motors

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