Types of AC Voltage Stabilizers

1. Ferromagnetic resonant AC voltage stabilizer

An AC voltage stabilizer device is made of a combination of a saturated choke coil and a corresponding capacitor with constant voltage and volt-ampere characteristics. The magnetic saturation type is the early typical structure of this kind of regulator. It has a simple structure, convenient manufacture, a wide allowable variation range of input voltage, reliable operation, and strong overload capacity. But the waveform distortion is large and the stability is not high. The recently developed voltage stabilizer transformer is also a power supply device that realizes voltage stabilization by nonlinear electromagnetic components. The difference between it and the magnetic saturation regulator lies in the difference in the structure of the magnetic circuit, and the basic working principle is the same. It realizes the dual functions of voltage regulation and voltage transformation at the same time on one iron core, so it is superior to ordinary power transformers and magnetic saturation voltage regulators.

2. Magnetic amplifier AC voltage stabilizer

A device that connects magnetic amplifier and auto-transformer in series, and uses electronic circuits to change the impedance of the magnetic amplifier to stabilize the output voltage. Its circuit form can be linear amplification or pulse width modulation. This type of stabilizer has a closed-loop system with feedback control, so it has high stability and good output waveform. However, due to the use of magnetic amplifiers with larger inertia, the recovery time is longer. Because of the self-coupling method, the anti-interference ability is poor.

Types of voltage stabilizer
Different types of AC voltage stabilizers

3. Sliding AC voltage stabilizer

A device that changes the position of the sliding contact of the transformer to obtain a stable output voltage is an automatic voltage regulating AC voltage stabilizer driven by a servo motor. This type of regulator has high efficiency, good output voltage waveform, and no special requirements for the nature of the load. But the stability is low and the recovery time is long.

4. Inductive AC voltage stabilizer

A device that stabilizes the output AC voltage by changing the phase difference between the secondary voltage of the transformer and the primary voltage. It is similar in structure to a wire-wound asynchronous motor, and in principle is similar to an induction voltage regulator. Its voltage regulation range is wide, the output voltage waveform is good, and the power can reach hundreds of kilowatts. However, because the rotor is often locked, the power consumption is large and the efficiency is low. In addition, due to a large amount of copper and iron materials, less production is required.

5. Thyristor AC voltage stabilizer

AC voltage stabilizer using thyristor as power adjustment element. It has the advantages of high stability, fast response, and no noise. However, due to the damage to the mains waveform, it will cause interference to communication equipment and electronic equipment.

6. Relay AC voltage stabilizer

Relays are used as AC voltage stabilizers to regulate auto-transformer winding. It has the advantages of a wide voltage regulation range, fast response speed, and low production cost. It is used for street lighting and remote home use.

Different types of AC voltage stabilizers
Different types of AC voltage stabilizers

New AC stabilized power supply

Compensated AC voltage stabilizer

Also known as an automatic servo-based voltage stabilizer. The additional voltage of the compensation transformer is connected in series between the power supply and the load. With the level of the input voltage, an intermittent AC switch (contactor or thyristor) or a continuous servo motor is used to change the size or polarity of the additional voltage. To achieve the purpose of voltage regulation, subtract (or add) the higher part (or insufficient part) of the input voltage. The capacity of the compensation transformer is only about 1/7 of the output power, which has the advantages of simple structure and low cost, but it is not very stable.

Numerical control AC voltage stabilizer and stepping voltage stabilizer

The control circuit is composed of logic elements or microprocessors, and the primary turns of the transformer are converted according to the input voltage so that the output voltage can be stabilized.

Purified AC voltage stabilizer

It can eliminate the peak interference from the power grid through its high isolation.

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