Single-phase AC (Alternating Current) full-automatic non-contact voltage stabilizer

Abstract

The invention belongs to the field of the application of an electronic technology and relates to a single-phase AC (Alternating Current) full-automatic non-contact voltage stabilizer, consisting of a commercial power supply, a full-bridge rectifying circuit, a self-coupled voltage regulator, and a half-wave DC (Direct Current) circuit and a relaxation-oscillator circuit for controlling silicon controlled rectifier (SCR), wherein the model of a unijunction transistor in the relaxation-oscillator circuit is BT33. By taking the working principle of the servo motor AC voltage stabilizer as reference, the single-phase AC full-automatic non-contact voltage stabilizer provided by the invention has the advantages of simple structure of circuit, realization of non-contact voltage regulation, rapid and accurate response to voltage regulation, no waveform distortion and suitableness for the commercial AC voltage range from 160 V to 290 V; and a large number of copper materials are saved. The voltage stabilizer has no voltage switching contact, so that no electromagnetic interference generated by contact sparking occurs, and no pollution is caused to the power grid; and in particular, the voltage stabilizer provided by the invention is suitable for regions with larger voltage fluctuation range of a power grid and can replace various traditional high-power AC voltage-stabilized sources in the market.

Description

technical field [0001] The invention belongs to the field of electronic technology application and relates to a fully automatic non-contact voltage stabilizer for single-phase alternating current. Background technique [0002] AC regulated power supplies are widely used in computers, test equipment, communication systems, medical equipment, industrial automation and other equipment with high voltage requirements. At present, the main types of AC regulated power supplies on the market are relay switching type, magnetic saturation type, and servo motor type. Their advantages and disadvantages are: the relay switching type has simple circuit structure and low cost, but The voltage classification is rough, the contacts are prone to sparks and electromagnetic interference when the voltage gear is switched, the switching response speed is slow, and there is an instantaneous power failure phenomenon. It is not suitable for use on equipment with high power requirements; the magneti...

AI Technical Summary

Problems solved by technology

At present, the main types of AC regulated power supplies on the market are relay switching type, magnetic saturation type, and servo motor type. Their advantages and disadvantages are: the relay switching type has simple circuit structure and low cost, but The voltage classification is rough, the contacts are prone to sparks and electromagnetic interference when the voltage gear is switched, the switching response speed is slow, and there is an instantaneous power failure phenomenon

It is not suitable for use on equipment with high power requirements; the magnetic saturation type has the characteristics of simple circuit structure and non-contact voltage stabilization, but it is not suitable for making AC voltage stabilizers with power greater than 150W; servo motor type AC voltage stabilizer The voltage sends a signal through the sampling control circuit to drive the servo motor, and automatically adjusts the position of the carbon brush of the auto-coupling regulator to adjust the output voltage to the rated value and reach a stable state. There is no distortion, no instantaneous power failure and no contact during the voltage switching process. The phenomenon of electromagnetic interference caused by ignition has high precision of voltage regulation and no noise during operation, but the circuit structure is complex, the response speed is slow, the voltage regulation range is narrow, the carbon brush of the autotransformer is easy to wear, and the consumption of copper materials is more

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