Ultimate Guide: Voltage Stabilizer Block Diagram, Working Principle and Its Types

This article will show you the functional block diagram for the voltage stabilizer. This article will cover the basic concepts of the stabilizer functioning principle, stabilizer block diagram, and types of voltage stabilizers.

A voltage stabilizer's main purpose is to maintain a steady voltage for electronic and electrical appliances. The voltage stabilizer provides a stable voltage at its output regardless of whether it receives an unstable or stable input voltage.

A voltage stabilizer, for example, is designed to deliver 230V at its output. It will therefore provide continuous 230V output, regardless of whether it is receiving input voltages 200V or 300V.

Stabilizer Block Diagram and Work

A voltage stabilizer works on a simple principle. Its main purpose is to maintain stable output voltage by increasing/ decreasing the voltage level depending on the unstable input voltage. The block diagram for Voltage Stabilizer can be seen in the following figure.

Diagram of the voltage stabilizer block

The Autotransformer, as you can see from the block diagram above, is the main component of any stabilizer that allows voltage to increase or decrease.

Some electronic circuitry is also used to detect fluctuations in input voltage, and to control the electromagnetic relay. The Comparator is a device that measures the input voltage and output voltage and then compares them to decide how much voltage to increase or decrease to maintain the output voltage constant.

If the input voltage drops below the normal value, the comparator will sense this and send the signal to the switch circuit to activate the electromagnetic relay to add more voltage to the transformer. The output voltage will not change if the input voltage drops below the normal value.

If the input voltage is higher than normal, an electromagnetic relay will switch on. It steps down the voltage by the autotransformer to normal and then the output voltage stays stable at the normal.

Two operations are used to operate the voltage stabilizer: Buck operation and Boost operation.

The Boost operation is when the input voltage drops to stabilize the output voltage.

Buck operation is when the input voltage exceeds the normal value. The stabilizer reduces the voltage to maintain the output voltage constant.

Stabilizer Types

There are three main types of voltage stabilizers.

1. Relay types Voltage Stabilizer

2. Servo Controlled Voltage Stabilizer

3. Static Voltage Stabilizer

Many electromagnetic relays are used in a relay-type voltage stabilizer. They are connected to the transformer tapping. They are turned on one at a time to control the output voltage and maintain it.

Relay types stabilizers do not allow for accurate voltage stabilization.

The Servo-controlled stabilizer uses the Servomotor to move the tap on the secondary side of the transformer. The servo motor controls the tap on the secondary side of the transformer. The servo-controlled voltage stabilizer provides more accurate voltage stabilizing than the traditional relay type stabilizer.

The static voltage stabilizer doesn't have moving parts. It uses semiconductor devices like IGBT, SCR, and Microcontroller to control the transformer that stabilizes the voltage. Static voltage stabilizers provide greater precision in voltage stabilizing.

What is a step-up transformer? How does it work?

The step-up transformer, as its name suggests, is a device that increases or controls the output voltage more than its input voltage. However, it keeps the current constant without any variables. These devices are used primarily in power generation stations and power transmission.

1. What is a step-up transformer?

A transformer is an electrostatic device that converts electric energy (from the primary winding), into magnetic energy (in the transformer's magnet core), and back into electricity (on the secondary side).

A type of transformer that converts low voltage (LV), high current (HV) from the transformer's primary to high voltage(HV), and low current value (TSU) on the transformers' secondary sides.

2. Construction of the Step-up transformer

The windings, transformer enclosure and core are the components of the step-up transformer.

a. Core

The transformer core is constructed of highly waterproof material.

This material allows for a magnetic pass to flow through the material with fewer losses. The core material has a higher permeability than the surrounding air.

This material will reduce the magnetic field lines in the main material. This allows the transformer to perform better by minimising losses.

The magnetic core allows flux to flow within it, which can lead to root damage such as eddy current losses due to hysteresis.

To make the core comparable to silicon steel or ferrite, we used a low-conductivity and high-hysteresis metal.

To keep eddy currents at a minimum, the transformer core is laminated. This prevents core heating.

A significant amount of electric energy is lost when the core heats up. The transformer's performance may also be affected.

b. Winding

The cascading transformer's windings will transmit the current to it.

These windings have been specially designed to cool the transformer and withstand all conditions.

The gauge thickness is applied to the primary side. Its number of turns is less than the secondary.

Similar to the primary, the secondary uses a thin coil and turns more than it does the primary.

It is designed so that the primary supply voltage can be lower than the secondary.

Most often, the material used for transformer windings is copper or aluminium.

Copper is more expensive than aluminium, but copper can extend the life of a transformer.

Different types of coatings are available for transformers to reduce eddy currents.

3. The working theory of the Step-up transformer

Below is a symbolic representation of the step-up transformer. The input and output voltages of the step-up transformer are shown in the following illustration. V1 and V2 respectively are depicted. The turns on the windings are T1 and T2. The input coil is primary, while the output coil is secondary.

Because the primary winding has fewer turns than the secondary, the output voltage is greater than the input voltage. The alternating current in the transformer flows once, then it stops and flows in the opposite direction.

An electric current will create a magnetic field around the coil. Once the current direction changes, the direction of the magnetic poles can be altered.

The magnetic field is used to induce the voltage in the coils. The secondary coil will also generate the voltage in a magnetic field called mutual-induction. The secondary voltage is inducible by the moving magnetic field created by the alternating current from the primary coil.

This step-up transformer formula can show the primary relationship between voltage and the number of turns per winding.

V2 /V1 = T2/T1

Where V2 is the secondary coil's voltage

"V1" is the voltage of the primary coil.

The secondary coil is turned on by 'T2".

The primary coil turns on when 'T1" is turned

4. The advantages of the Step-up Transformer

These are some of the benefits of step-up transformers.

• They can be used in commercial and residential settings.
• Power Transmitter
• Maintenance
• Efficiency
• Continuous Working
• Quick Start

5. The disadvantages of the Step-up transformer

These are the disadvantages of step-up transformers:

• It needs a cooling system
• Works for Alternate Current
• These transformers are huge.

6. These are the benefits of Step-up Transformers.

These transformers are used to stabilize low-to-high voltage stability in electronic equipment, such as Inverters & Voltage Stabilizers.

• It is used for the distribution of electrical energy.
• This transformer is used for changing the voltage in power transmission lines that are generated by generators.
• This transformer can also be used to turn on electric motors, X-ray machines, microwave ovens and other devices.
• It is used to improve electrical and electronic equipment.

7. Consider these factors when selecting a step-up transformer

When choosing a step-up transformer, there are many things to consider.

• Transformers Efficiency
• There are many phases
• Transformers Rating
• Cooling Medium
• Material for Windings