Definition
A servo motor is an electric motor specifically designed for precise, dynamic control, typically built with low rotor inertia, high torque density, and often an integrated feedback device (encoder or resolver), paired with a servo drive that closes a real-time control loop around it. It is the specialized motor design; the servo drive is the control electronics that make its closed-loop precision possible.
Key facts
- Designed specifically for closed-loop position, speed, or torque control, unlike a general-purpose electric motor.
- Typically features low rotor inertia and high torque density, optimized for rapid acceleration and precise positioning.
- Commonly integrates or is closely paired with a feedback device (encoder or resolver) that a servo drive uses for its control loop.
- Requires a servo drive rather than a standard VFD to achieve its intended closed-loop precision.
How does Servo motor work or appear?
A servo motor is distinguished from a general-purpose electric motor by its design focus on dynamic response and positioning precision: lower rotor inertia for faster acceleration, higher torque density, and typically an integrated or closely coupled feedback device that reports actual position or speed back to its controlling drive.
What should technicians inspect for Servo motor?
A servo motor is the physical machine; a servo drive is the control electronics that closes the feedback loop around it, continuously comparing the motor's actual position or speed (from its encoder or resolver) against a commanded value and adjusting output accordingly: the two are designed as a matched pair for precise motion control.
FAQ
Frequently asked questions
What role does a servo motor take on in a controlled movement?
A servo motor provides precise, dynamic rotational motion, working with an integrated or coupled feedback device and a servo drive that closes a real-time control loop around it to hold or follow a commanded position, speed, or torque.
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