Single-phase AC voltage stabilizer

Abstract

A single-phase AC voltage stabilizer comprises a compensation main circuit, an analog-digital conversion coding unit, a delay protection unit, an interlocking control unit, a trigger unit and an errordetection control unit, wherein the compensation main circuit comprises a compensation transformer group, a thyristor bridge and a relay protection switch, the analog-digital conversion coding unit is used for performing voltage sampling on a voltage of an AC power supply, a voltage class code value is output by the analog-digital conversion coding unit, the delay protection unit is used for outputting the voltage class code value after delay and a control signal of a non-trigger region to the interlocking control unit, and the interlocking control unit is used for outputting the trigger control signal to control on / off of a thyristor in the main circuit thyristor bridge. Interlocking control is achieved, meanwhile, open-circuit protection is performed on the thyristor bridge by the errordetection control unit according to a fact whether a logic error occurs in the analog-digital conversion coding unit or the interlocking control unit, the abnormal protection effort of the single-phase AC voltage stabilizer during the working process is effectively improved, and the working of the single-phase AC voltage stabilizer is more stable and reliable.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a single-phase AC voltage stabilizer. Background technique [0002] The existing compensated AC voltage stabilizer has the advantages of wide voltage stabilization range, almost no waveform distortion, high overall efficiency and strong load adaptability. The principle is to automatically control the switching of different winding coils of the primary winding on the compensation transformer according to the level of the input voltage, using the ratio relationship between the primary side working winding and the secondary winding, or by adjusting the voltage applied to the primary winding , providing bidirectional and multi-level voltage compensation, so as to achieve the purpose of voltage regulation and stabilization. [0003] The disadvantage of the existing compensated AC voltage stabilizer is that when the motor is used to control the movement of the carbon brush to c...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the existing compensated AC voltage stabilizer, the present invention provides a compensated single-phase AC voltage stabilizer, which includes a compensated main circuit, an analog-to-digital conversion coding unit, a delay protection unit, and an interlock control unit, trigger unit, error detection control unit

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