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About Motor Speed Controllers
Motor speed controllers are electronic devices that control motor speed. They carry specifications for drive type, product classification, electrical ratings, and operating parameters. Drive type describes the category of motor or system that is driven or controlled. Choices for alternating current (AC) products include induction motors, synchronous motors, pole number control drives, sensor-less vector drives, vector or feedback drives, and servos or brushless motors. Choices for direct current (DC) motors include brushed motors, brushless motors, and servomotors. Drive-type categories for stepper motors include unipolar stepper, bipolar stepper, permanent magnet stepper, variable reluctance stepper, and hybrid stepper. Full-step, half-step, mini-step and micro-step products are also available. Suppliers of motor speed controllers may also offer products for linear, voice coil, pneumatic, and hydraulic motors.
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Engineering Web: Motor Speed Controllers - Machine Design
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Programmable Logic Controller (PLCS) - Servo Control -... reference information about programmable logic controllers ( PLCS), servo control units, motor controllers and many other types of controllers. |
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AC Controllers | Machine Design More sophisticated controllers, sometimes called drives, regulate motor torque, speed, or horsepower in response to remote commands. |
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Correcting errors that never happen | Machine Design Today's modern controllers have the processing power needed to map servo errors at the first (acceleration) and second (jerk) derivatives of speed. |

