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Differences Between Servo Stabilizer and Static Stabilizer
In the field of electrical and electronics, a stabilizer is an electronic device that is employed for regulation and stabilization of voltage supplied to the connected load devices. The primary function of a stabilizer is to provide a constant and steady voltage to the connected devices; hence it is also known as voltage stabilizer.
As we know, we receive fluctuating voltages many times from our main power grid. These fluctuating voltages can damage sensitive electronic devices like laptops, computers, TVs, and other appliances. Hence, we need to provide a stable voltage to protect all these devices. For this purpose, a voltage stabilizer is used between supply mains and the load device.
Today, several different types of stabilizers are available, such as static voltage stabilizer and servo voltage stabilizer. In this article, we will explore servo stabilizer and static stabilizer along with their significant differences. So, let’s get started with the basic introduction of servo stabilizer and static stabilizer.
What is a Servo Stabilizer?
A servo stabilizer is an electronic device used to provide a stable and constant output voltage required to drive sensitive electrical and electronic devices. It is also known as AVS (Automatic Voltage Stabilizer) or AVR (Automatic Voltage Regulator).
Servo stabilizer is capable to compensate the voltage fluctuations present in the mains input power supply to provide a constant voltage at the output side. Therefore, it ensures that the connected load devices receive a constant voltage and work efficiently.
To provide constant output voltage, a servo stabilizer uses an auto transformer controlled by a servo motor. The servo motor continuously monitors the input supply voltage for fluctuations, and adjust the auto transformer taps to maintain the output voltage at a constant level.
Servo stabilizers are commonly used in applications, including data centers, telecom systems, labs, residential and commercial buildings, industrial machinery, medical facilities, etc.
What is a Static Stabilizer?
A static stabilizer is an electronic device that provides a constant output voltage by regulating and stabilizing the input supply voltage. For this purpose, it uses solid-state or semiconductor electronic components like transistors, diodes, MOSFET, etc. Therefore, it is also known as electronic voltage stabilizer or solid-state voltage stabilizer.
The electronic circuit of a static stabilizer is capable to monitor and regulate the voltage levels to produce a constant and stable voltage at output. The major advantage of a static stabilizer is that it does not contain any moving components like servo motor, auto transformer, etc. instead it uses power electronic components, such as transistors, thyristors, diodes, etc. The static stabilizer is also relatively faster and more precise in voltage regulation.
The chief advantages of static stabilizers include longer lifespan, faster response, high precision and accuracy, high load handling capacity, etc. Static stabilizers are commonly being used with computers, medical equipment, telecommunication devices, data centers and servers, and other sensitive electronic devices.
After getting a brief overview of servo stabilizer and static stabilizer. Let us now discuss the important differences between servo stabilizer and static stabilizer in detail.
Difference between Servo Stabilizer and Static Stabilizer
The following table highlights all the significant differences between servo stabilizer and static stabilizer −
Parameter |
Servo Stabilizer |
Static Stabilizer |
|---|---|---|
Basic |
A type of voltage stabilizer that uses servo motor-controlled auto transformer to provide a stable and constant output voltage to the connected load devices is called a servo stabilizer. |
A type of voltage stabilizer that uses power electronic components and solid-state control circuit to regulate the voltage to provide a constant output voltage is called a static stabilizer. |
Also known as |
Servo stabilizer is also known as Automatic Voltage Stabilizer (AVS) or Automatic Voltage Regulator (AVR). |
Static stabilizer is also known as electronic stabilizer or solid-state stabilizer. |
Moving components |
Servo stabilizer consists of moving components like servo motor, auto transformer, etc. |
Static stabilizer does not consist of any moving components, instead it consists of solid-state components. |
Type of device |
Servo stabilizer is a type of electro mechanical device. |
Static stabilizer is a type of electronic device. |
Maintenance |
Servo stabilizer requires regular maintenance due to presence of moving parts. |
Static stabilizer is almost maintenance free, as it contains static components. |
Voltage regulation mechanism |
Servo stabilizer provides voltage regulation by adjusting the position of servo motor and auto transformer taps. |
Static stabilizer provides voltage regulation by using an electronic control circuit. |
Response |
Servo stabilizers have slower response at voltage regulation. |
Static stabilizers are faster in terms of voltage regulation. |
Input voltage range |
Servo stabilizer can handle a limited range of input voltages. |
Static stabilizers can handle a wider range of input voltages. |
Noise filtering feature |
Servo stabilizer does not have built-in noising filtering feature; hence it requires an external noise filter circuit. |
Static stabilizer has built-in noise filtering feature. |
Precision & accuracy |
Servo stabilizers are relatively less precise and accurate at voltage regulation. |
Static stabilizers provide more precise and accurate voltage regulation. |
Efficiency |
Servo stabilizers are less efficient due to mechanical losses in moving parts. |
Static stabilizers are more efficient. |
Reliability |
Servo stabilizers are less reliable due to use of servo motor. |
Static stabilizers are more reliable. |
Correction time |
Servo stabilizers have longer correction time, typically from 50 ms to 5 seconds. |
Static stabilizers have a shorter correction time, typically from 20 ms to 30 ms. |
Short circuit handling capability |
Servo stabilizers are not capable to handle short-circuit at output stage; hence extra equipment is required for this purpose. |
Static stabilizers are able to handle short circuits at output stage. |
Weight and size |
Servo stabilizers are generally heavier and larger due to inclusion of auto transformer and servo motor. |
Static stabilizers are lighter and compact as compared to servo stabilizers. |
Cost |
Servo stabilizers are more expensive. |
Static stabilizers are less expensive than servo stabilizers. |
Lifespan |
Servo stabilizers have a shorter lifespan. |
Static stabilizers have a longer lifespan. |
Applications |
Servo stabilizers are mostly used for voltage regulation in industrial and heavy machinery. |
Static stabilizers are used in most residential, commercial, and industrial applications to provide constant voltage to sensitive electronic devices. |
Conclusion
Both servo stabilizer and static stabilizer are types of voltage stabilizers used in a variety of applications to provide a stable and constant output voltage. The most significant difference that you should note here is that servo stabilizers use servo motor-controlled auto transformer, whereas static stabilizers use solid-state power electronic components as their main circuit components.
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