What is a 1-Phase AC Servo Drive?
It is a servo drive device powered by a single-phase AC power supply (typically 220V) for precise control of the position, speed, and torque of an AC servo motor.
Compared to three-phase servo drives, single-phase AC servo drives offer the following advantages:
Simple installation, no three-phase power supply required
Smaller size, lower wiring costs
Ideal for small to medium power automation equipment
Widely used in light industrial automation, stand-alone equipment, OEM standardized equipment, and space-constrained control cabinet systems.
Servo driver parameters
| Project | Parameter Range |
|---|---|
| Input Power | AC 220V (Single Phase) |
| Control Mode | Position / Speed / Torque |
| Control Method | Fully Digital Servo Control |
| Output Power | 0.1 kW – Small to Medium Power Range |
| Feedback Type | Incremental Encoder / 17bit / 23bit Absolute Value |
| Communication Interface | Pulse / RS485 / CANopen / EtherCAT |
| I/O | Multi-channel Digital Input / Output |
| Protection Functions | Overcurrent, Overvoltage, Overload, Overtemperature, Encoder Malfunction |
| Operating Characteristics | Low-speed Stability, Low Noise, Fast Response |
Matching AC servo motor parameters
| Project | Typical Range |
|---|---|
| Motor Type | Permanent Magnet Synchronous AC Servo Motor |
| Power Range | 0.1 kW – 1.5 kW (Typical) |
| Rated Speed | 2000 / 3000 RPM |
| Maximum Speed | ≥ 3000 RPM |
| Torque Characteristics | Smooth Start-up, No Jitter at Low Speeds |
| Inertia Selection | Low / Medium Inertia |
What is the difference between 1 Phase and 3 Phase AC Servo Drives?
The main difference lies in power supply and application scope:
| Item | 1 Phase AC Servo Drive | 3 Phase AC Servo Drive |
|---|---|---|
| Power Input | Single-phase 220V | Three-phase 380V |
| Power Range | Small to medium | Medium to high |
| Installation | Simple, low cost | Higher infrastructure requirement |
| Typical Use | OEM machines, compact systems | Heavy industrial equipment |
What voltage does a single phase AC servo drive require?
Most 1 Phase AC Servo Drives operate at AC 220V (±10%), which allows them to be used in factories, workshops, and export markets where three-phase power is unavailable.
What motor types are compatible with 1 Phase AC Servo Drives?
They are designed to work with AC permanent magnet servo motors, supporting:
Incremental encoders
17-bit absolute encoders
23-bit absolute encoders
This ensures stable closed-loop control and high positioning accuracy.
Is a 1 Phase AC Servo Drive suitable for precision positioning?
Yes.
With high-resolution encoder feedback and digital control algorithms, single phase AC servo drives deliver smooth low-speed performance, accurate positioning, and fast dynamic response, suitable for CNC light machines and precision automation.
What control modes does a 1 Phase AC Servo Drive support?
Standard control modes include:
Position Control
Speed Control
Torque Control
This allows flexible integration into different automation systems.
What communication methods are supported?
Depending on the model, 1 Phase AC Servo Drives support:
Pulse + Direction
RS485
CANopen
EtherCAT (low-power segment)
This ensures compatibility with PLC, motion controllers, and CNC systems.
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