The working principle of the voltage regulator is to use the circuit voltage regulation and control of the circuit into the control of the current, generally in the voltage input changes, the voltage regulator of the voltage regulator will be through the control circuit to sample than in driving the servo motor's rotation, thus changing the position of the regulator carbon brushes, through the automatic adjustment of the coils, so that the output voltage is more stable, so that electrical appliances can be used in the The voltage is not stable in the case of normal use.
The voltage regulator consists of a voltage regulator circuit, a control circuit, and a servo motor, etc. 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 regulator carbon brushes change their position, and the turns ratio of the coils is automatically adjusted to keep the output voltage stable. Larger capacity regulator, but also use the principle of voltage compensation work.
Voltage regulator role : voltage regulator is a power supply circuit or power supply equipment to automatically adjust the output voltage, its role is to fluctuate and not up to the requirements of electrical equipment power supply voltage stabilization in its set value range, so that a variety of circuits or electrical equipment in the rated working voltage normal operation.
Voltage regulator features : reliable, strong overload capacity, output short-circuit automatic protection, simple structure, voltage range. Anti-interference ability. But the weight is large, large volume, high price, high noise, iron core temperature rise, the input power supply operating frequency requirements.
Voltage regulator for the following range : computer-related products, medical monitoring systems, program control systems, automatic test equipment, radio and television equipment, post and telecommunications equipment, automatic plug-ins, production lines, printing equipment, plastic injection equipment, ATM, SMT equipment, scientific research and testing.
There are more types of voltage regulators, common voltage regulators are: automatic voltage regulator, purified power AC voltage regulator, parametric voltage regulator, its advantages and disadvantages are as follows:
1, automatic voltage regulator
This regulator is simple in structure, inexpensive, but the reliability is poor. Because it relies on the movement of carbon brushes (sliding or rolling) to stabilize the voltage. The control circuit controls the M-point to move up and down according to the output setting so that the output voltage meets the requirements of the load. The disadvantages of this circuit are low reliability and slow dynamic response, not isolated from interference.
2, purified power AC voltage regulator
The emergence of this AC voltage regulator is mainly to replace the original electromagnetic compensation type 614 regulator. Reliability is very high, there is the ability to isolate the interference. But this circuit has a narrow adjustment range, generally only adapted to the rated grid voltage ± 10%, the power is not easy to do, which obviously can not meet the requirements of the telecommunications sector, so generally not under consideration.
3, parametric voltage regulator
Parametric voltage regulator is the early application of the more common voltage regulator, high reliability, due to parametric voltage regulator is working in resonance, so the isolation of interference ability is relatively strong, but due to the work in the circuit is a large amount of internal storage of reactive power, so the input power factor is low, can not take full advantage of the input of the utility power, taking up valuable power resources! The newest addition to the system is a new type of power supply, which is more likely to be used in telecommunication applications where the power supply is more demanding.
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