How do servo voltage stabilizers work?
Servo voltage stabilizers work by continuously monitoring the input voltage and adjusting it to provide a stable output voltage using a servo motor and a variable transformer. They are known for their high accuracy and reliability, especially in industrial or sensitive applications.
š§ How It Works ā Step by Step:
- Voltage Sensing:
- An internal electronic control circuit constantly monitors the incoming voltage.
- Error Detection:
- If the input voltage deviates from the desired output level (e.g., 230V), the control circuit detects the error.
- Servo Motor Activation:
- A servo motor is triggered to rotate a brush arm connected to a variable transformer (variac).
- Voltage Adjustment:
- The brush adjusts the transformer’s tap to increase or decrease the voltage being supplied to the output.
- This is done smoothly and continuously, not in steps like relay-based stabilizers.
- Buck/Boost Transformer (if used):
- In some designs, a buck-boost transformer works in tandem with the variac to fine-tune and stabilize the voltage.
- Stable Output Delivered:
- The corrected, stable voltage is then supplied to the connected equipment, typically within Ā±1% of the target.
š Key Features of Servo Voltage Stabilizers:
| Feature | Description |
|---|---|
| High Precision | Voltage regulation accuracy Ā±1ā2%. |
| Wide Input Range | Often handles 140Vā280V or even wider. |
| Continuous Regulation | Smooth voltage correction, not stepped. |
| Overload Protection | Built-in protection against excess load. |
| Delay Function | Prevents immediate startup after outages. |
| Thermal Overload Trip | Shuts down if internal components overheat. |
ā Advantages:
- Ideal for sensitive equipment (medical devices, CNC machines, labs).
- More reliable than relay-based types for large or dynamic loads.
- Longer lifespan of connected equipment due to steady voltage.
ā Disadvantages:
- Slower than static stabilizers (response time ~1ā2 seconds).
- Contains moving parts (servo motor), which may need maintenance.
- Higher cost than basic relay types.
Would you like a simple diagram showing how the components are connected in a servo stabilizer?