Difference Between Voltage Stabilizer and Voltage Regulator

Voltage Stabilizer

A voltage stabilizer is mainly a device to stabilize the voltage output. Almost all voltage stabilizers use the same process technology to ensure the stability of the output voltage, that is, connect the input voltage to the error amplifier for sampling by the voltage divider resistor, and then the error amplifier forces the voltage across the input and output terminals to maintain equal. In this way, the purpose of providing a stable current to the load device and ensuring a stable output voltage is achieved.

The voltage stabilizer consists of a voltage regulation circuit, a control circuit, and a servo motor. When the input voltage or load changes, the control circuit performs sampling, comparison, and amplification, and then drives the servo motor to rotate, so that the position of the carbon brush of the voltage regulator changes, and the coil turns ratio is automatically adjusted to maintain the stability of the output voltage.

Voltage stabilizer vs. Voltage regulator
Voltage stabilizer vs. Voltage regulator

Voltage Regulator

The voltage regulator is a voltage regulating power supply that can adjust the voltage to the electrical load, and its function is to transform the unadjustable power grid distribution voltage. The voltage regulator is an autotransformer with a continuously adjustable turns ratio, and the brushes closely match the polished surface of the coil under the action of spring pressure. When operating the control “up/down” button to drive the synchronous motor to drive the carbon brush of the voltage regulator to slide along the polished surface of the coil, the turns ratio can be changed continuously, so that the output voltage can be adjusted steplessly and smoothly.

Automatic voltage regulation: You can preset a voltage (any fixed point within the adjustment range) value, adjust the potentiometer to the required voltage point, observe the set voltage value through an external voltmeter, and adjust the voltage value after the voltage value is set. The voltage regulator will automatically adjust the set voltage, and if the external voltage fluctuates, it can also automatically adjust the voltage stabilizer voltage.

The internal structure of the voltage regulator is similar to that of a wire-wound asynchronous motor. Since it often works under braking, it is similar in principle to that of a transformer. Simply put, the voltage regulator needs to be adjusted manually (except for the power adapter of course). When the supply voltage is lower than our electricity demand, it is manually increased, and when the supply voltage is higher than our electricity demand, it is reduced. Most of the voltage stabilizers are automatically adjusted and controlled. Regardless of the level of the input voltage, it will automatically adjust to the output voltage we set. Of course, it is impossible to fix this value. It will fluctuate up and down within a range. Naturally, the less the fluctuation range is for our equipment, the better it is for our electrical equipment.

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