Adjustable single-phase AC voltage regulator

Abstract

The invention provides an inductance adjusting type single-phase alternating current voltage stabilizer. The inductance adjusting type single-phase alternating current voltage stabilizer comprises an auto-transformer B, an inductance coil L and a voltage stabilizing control circuit. A primary coil of the inductance coil is connected into a primary side loop of the autotransformer in series, voltage across the secondary side of the auto-transformer is output voltage, a secondary coil of the inductance coil is connected with the voltage stabilizing control circuit, equivalent impedance of the inductance coil is adjusted through comparison of reference voltage and the output voltage, and voltage stabilizing is achieved. The circuit structure of the inductance adjusting type single-phase alternating current voltage stabilizer is simple, the voltage stabilizing accuracy of the voltage stabilizer is + / -2% of the output voltage, the voltage stabilizing process is free of lag, the voltage adjusting range is between 130 V and 380 V, stepless voltage adjustment can be achieved, and the adopted auto-transformer is free of an electric brush.

Description

technical field

[0001] The invention relates to an AC voltage stabilizer, which includes an autotransformer, an inductance coil is connected in series in the primary circuit of the autotransformer, the secondary side of the autotransformer outputs an AC voltage, and the output AC voltage is realized by changing the inductance of the inductance coil voltage regulation and stabilization. Background technique

[0002] The structure of a commonly used single-phase AC voltage stabilizer includes an autotransformer, a stepping motor, and the secondary output AC voltage of the autotransformer. By comparing the output voltage of the secondary side with the set voltage, the stepper is driven according to the comparison result. The motor rotates the brush to adjust the voltage output by the secondary side to achieve voltage stabilization. The structure of this kind of AC voltage stabilizer is relatively complicated, the voltage regulation has a certain hysteresis, and the precision o...

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