Description

Siemens Servo Drive & Motor: High-Precision Industrial Automation Solutions

Name: Servo Drive &amp; Motor Solutions
SKU: 534
Availability: InStock

Definition

Siemens AC servo motors feature a stator design similar to capacitor-phase-separated single-phase asynchronous motors. The stator contains two windings spaced 90° apart: an excitation winding (Rf) connected to AC voltage (Uf), and a control winding (L) connected to the control signal voltage (Uc). This dual-winding structure enables precise speed and position control for industrial automation applications.

Basic Information

AC servo motors are widely recognized as high-performance two-phase servo systems. Unlike standard motors, they are engineered with high rotor resistance and low rotational inertia to deliver:

Wide speed range capabilities
Linear mechanical characteristics
Zero self-rotation phenomenon
Fast response performance

Two common rotor designs meet these requirements:

High-resistivity squirrel-cage rotor: Constructed from conductive materials with high-resistance bars, optimized for low inertia.
Hollow cup-shaped rotor: Made of thin aluminum alloy (0.2–0.3mm wall thickness), offering extremely low inertia, rapid response, and smooth operation.

When no control voltage is applied, only the excitation winding generates a pulsating magnetic field, keeping the rotor stationary. When control voltage is applied, a rotating magnetic field drives the rotor in the corresponding direction. Under constant load, speed varies proportionally with control voltage magnitude, and reversing the voltage phase reverses rotation direction.

Key Technical Characteristics

Siemens servo motors operate on principles similar to phase-separated single-phase asynchronous motors but with significantly higher rotor resistance, delivering three critical advantages:

High Starting Torque & Fast Response: Elevated rotor resistance shifts the critical slip rate (S₀ > 1), linearizing torque characteristics and enabling immediate rotation upon voltage application, ensuring high sensitivity and quick start-up.
Wide Operating Range: The high-resistance rotor design supports stable performance across broad speed ranges, suitable for diverse industrial automation tasks.
No Self-Rotation & Safe Shutdown: The motor stops immediately when control voltage is lost, eliminating unintended rotation and enhancing system safety.

Technical Specifications

Output Power: 0.1–100W (ideal for low-power control systems)
Voltage & Frequency Options:
- 50Hz: 36V, 110V, 220V, 380V
- 400Hz: Customized voltage options available
Physical Note: Compared to DC servo motors of equivalent capacity, AC servo motors are slightly bulkier, making them best suited for low-power (0.5–100W) industrial applications.