A voltage regulator is a device that stabilizes the output voltage. The voltage regulator is composed of a voltage regulating 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 is changed. By automatically adjusting the coil turns ratio, the output voltage is kept stable.
Voltage stabilizer is a kind of power supply circuit or power supply equipment that can automatically adjust the output voltage. Its role is to stabilize the power supply voltage that fluctuates greatly and does not meet the requirements of electrical equipment within its set value range. The equipment can work normally under the rated working voltage.
The first power regulators stabilized the voltage with the bounce of a relay. When the grid voltage fluctuates, the automatic correction circuit of the power regulator starts, causing the internal relay to act. Forcing the output voltage to stay near the set value, this circuit has the advantages of simple circuit, the disadvantage is that the voltage regulation accuracy is not high and every time the relay jumps and shifts, it will cause a momentary interruption of the power supply and spark interference.
This has a great impact on the reading and writing of computer equipment, which can easily cause the computer to have an error signal, and in severe cases, it can also damage the hard disk.
Most of the high-quality small voltage regulators use a motor to drag a carbon brush to stabilize the voltage. Such voltage regulators have little interference with electrical equipment and the voltage regulation accuracy is relatively high.
Use the core material saturation characteristics to show that the output voltage is basically stable. Advantages: reliable operation, strong overload capacity, automatic protection when output short circuit, simple structure, large voltage stabilization range, strong anti-interference ability.
Disadvantages: heavy weight, large size, high price, high noise, high core temperature, high requirements for input power supply frequency.
Applications: computer-related products, medical monitoring systems, program control systems, automatic test equipment, radio and television equipment, post and telecommunications equipment, automatic plug-in machines, production lines, printing equipment, plastic injection equipment, ATMs, SMT equipment, scientific research experiments, etc.
Basic structure of magnetically amplified AC voltage regulator The output voltage is stabilized by changing the magnetic resistance of the magnetic amplifier transformer connected in series to the primary circuit of the self-propagating transformer.
Advantages: high voltage regulation accuracy and fast response time.
Disadvantages: heavy weight, large size and high price.
Application: Precision electronic equipment, medical equipment, computer room, laboratory, product aging and testing.
Voltage stabilizers can be widely used in: computers, precision machine tools, computed tomography (CT), precision instruments, test equipment, computers, industrial and mining enterprises, oil fields, railways, construction sites, schools, hospitals, Elevator lighting, imported equipment, production lines and other places that require stable power supply voltage. It is also suitable for users at the end of low-voltage distribution networks with low or high power supply voltages and large fluctuations, and electrical equipment with large load fluctuations. It is particularly suitable for all voltage-stabilized electrical places that require high grid waveform requirements. The high-power compensating power regulator can be connected to firepower, hydraulic power, and small generators.