Transformers of automatic voltage regulators are a type of power auxiliary equipment that can change voltage. They are all electrical instruments that can convert one voltage into another voltage value.

A. Common points of automatic voltage regulator and transformer:

Automatic voltage regulator and transformer are both power auxiliary equipment that convert one voltage value into another. The internal of automatic voltage regulator is also composed of multiple transformers. When the voltage changes, automatic voltage regulator stabilizes the voltage by changing the coil turns position of the internal transformer.

B.  The difference between automatic voltage regulator and transformer:

1. Different definitions: Transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Automatic voltage regulator is a device that stabilizes the output voltage.

2. Different compositions: The main components of a transformer are the primary coil, secondary coil, and iron core (magnetic core). The automatic voltage regulator consists of a voltage regulating circuit, a control circuit, and a servo motor.

3. Different functions: The main functions of transformers are voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. The function of an automatic voltage regulator is to stabilize the power supply voltage that fluctuates greatly and does not meet the requirements of electrical equipment within its set value range, so that various circuits or electrical equipment can work normally at the rated working voltage.

4. Different principles: Transformers are static electrical appliances made using the principle of electromagnetic induction. The principle of an automatic voltage regulator is that some electrical appliances contain coil components, which can generate eddy currents that obstruct the current during the initial stage of power on. The generation of eddy currents not only weakens the instantaneous voltage at the time of electrical start-up, resulting in slow start-up, but also strengthens the instantaneous voltage generated after a circuit breaker, which may cause spark damage to the circuit. At this point, an automatic voltage regulator is needed to protect the normal operation of the circuit.

C. When to use transformers and automatic voltage regulators:

When the voltage is unstable and fluctuates frequently, and the operating voltage of the equipment is the same as the mains supply voltage, use an automatic voltage regulator.

When the voltage is stable and the voltage used by the equipment is different from the mains supply voltage, we need to choose a transformer.

When the equipment voltage is different from the mains supply voltage and fluctuates frequently and unstably, we need to choose a combination of automatic voltage regulator and transformer for use. You can also choose a stable transformer that integrates stabilization and transformation to solve the problem.