Full-automatic non-contact AC voltage stabilizer circuit

Published:2011/7/5 19:27:00 Author:Christina | Keyword: Full-automatic, non-contact, AC, voltage stabilizer | From:SeekIC

When the city electricity voltage is in the range of 150V~300V, this circuit can adjust the output voltage accurately and quickly. The circuit is as shown in the figure. The city electricity is rectified by the VD1~VD4 and then adds to the thyristor VT, the conduction angle of VT is controlled by the BT33. The relaxation oscillator is composed of the BT33, C, R1, R2, R3 and KP, you can change the oscillation cycle by changing KP. When the city electricity voltage increases, the voltage of BT33 increases too, the oscillation speed becomes faster, the conduction angle of VT decreases, the voltage of VT increases, so the voltage of L1 will not change. On the contrary, when the voltage of VT decreases, the voltage of L1 will not change too.



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