Testing Systems for Servo Motors
A Servo Motor is a closed-loop servomechanism that uses position feedback (like encoder) to control its motion and final position. The input to its control is a signal (either analog or digital) representing the position commanded for the output shaft. Servo Motors are used in radio-controlled airplanes to position control surfaces like elevators, rudders, walking a robot, or operating grippers.
Advantages
• Excel at position and speed control.
• High output power relative to motor size and weight.
• Encoder determines accuracy and resolution.
• High efficiency. It can approach 90% at light loads.
• High torque to inertia ratio. Servo Motors can rapidly accelerate loads.
• Achieve high speeds at high torque values.
• Quiet at high speeds.
Disadvantages
• Requires tuning to stabilize the feedback loop.
• Will become unpredictable when something breaks, so safety circuits are required.
• Complex controller requires encoder and electronic support.
• Peak torque is limited to a 1% duty cycle. Servo Motors can be damaged by sustained overload.
• Gear boxes are often required to deliver power at higher speeds.
• Higher overall system cost and the installation cost of a Servo Motor system may be higher than that of a stepper motor due to the requirement for feedback components.
Maximizing Precision
Leveraging Motomea for Servo Motor Testing
The Motomea Regenerative Dynamometer System (Motomea RDS) enables:
• Complete load performance testing:
Torque, Speed, Current, Efficiency, Power Input, Power Output.
• Standard electrical parameters testing:
HV, Vibration, Noise, and others.