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Learn about the key differences between AC and DC Servo motor on the basis of important real-world factors such as efficiency, speed & torque adaptability, size, operational stability, noise, maintenance, and output power.
Power Source is the key difference between AC and DC Servo motors. AC servo motors depend on an AC power source whereas DC Servo motors depend on DC power source (like Batteries). AC servo motors performance is dependent upon voltage as well as frequency whereas DC servo motors performance mainly relies upon voltage alone. The following table explains the key differences between AC Servo motor and DC Servo motor.
Difference between AC Servo Motor and DC Servo Motor
| Characteristics | AC Servo Motor | DC Servo Motor |
|---|---|---|
| Efficiency | Low (about 5-20%) | High |
| Speed & Torque | Adaptable to strong torque and high-sped working condition. | Adaptable to a limited torque and speed. |
| Stability | Less stability issues | More problems of stability |
| Noise | No radio frequency noise | Brushes cause radio frequency noise |
| Operation | Have stable and smooth operation | Noisy operation |
| Weight & Size | Lighter weight and small in size | Heavy weight and large in size |
| Repair & Maintenance | Since no commutators, Less maintenance is required | Because of commutation process, regular maintenance is needed. |
| Output Power | Deliver low power normally between 0.5W and 100W | Provide high power |
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