What is the working principle of voltage regulator?

A voltage regulator is a device for stabilizing the output voltage. The voltage regulator consists of voltage regulator, control circuit and servo motor. When the input voltage or load changes, the control circuit samples, compares and amplifies, and then drives the servo motor to rotate, so that the position of the carbon brush of the voltage regulator changes. By automatically adjusting the turns ratio of the coil, the output voltage remains stable. Scope of application: The voltage regulator can be widely used in industrial and mining enterprises, oil fields, railways, construction sites, schools, hospitals, posts and telecommunications, hotels, scientific research and other departments, precision machine tools, CT, precision instruments, test equipment, elevator lighting, imported equipment, production lines and other places that need stable power supply voltage. It is also suitable for low-voltage distribution network end users with low or high power supply voltage and large fluctuation range, as well as electrical equipment with large load fluctuation, especially suitable for all places with high requirements for power grid waveform. The high-power compensation power regulator can be connected with thermal power, hydropower and small generators. Function: Voltage regulator is a power supply circuit or equipment that can automatically adjust the output voltage. Its function is to stabilize the power supply voltage that fluctuates greatly and cannot meet the requirements of electrical equipment within its set value range, so that all kinds of circuits or electrical equipment can work normally under the rated working voltage. First of all, the power regulator stabilizes the voltage through the jump of relay. When the grid voltage fluctuates, the automatic correction circuit of the power regulator is started to make the internal relay act. Forcing the output voltage to keep near the set value, this circuit has the advantages of simple circuit and low voltage stabilization accuracy. Every time the relay jumps, the power supply will be interrupted instantly, resulting in spark interference. This greatly interferes with the reading and writing work of computer equipment and is easy to cause computer error signals. In severe cases, the hard disk will be damaged. High-quality small voltage regulators mostly use motor to drag carbon brush to stabilize voltage, which has little interference to electrical equipment and relatively high voltage stabilization accuracy.