AC Voltage Regulator One

Published:2011/5/7 5:16:00 Author:Joyce | Keyword: AC Voltage Regulator, One | From:SeekIC

Here is an introduction of an automatic non-contactor compensating AC stabilizer.It changes second offset voltage by controlling primary voltage of the transformer,thus solving the power outages problems in regulating the circuit.The input voltage of AC stabilizer is 167 - 264V,and output voltage is 220 (1土5%) V.Operating principleThe AC stabilizer circuit consists of a power supply voltage-stabilising circuit,an input comparison circuit, a coding control circuit,a compensating output circuit and overvoltage/undervoltage protection circuit , as shown in figure 5-40. The power supply voltage-stablising circuit consists of power transformer T3, commutation diode VDl- VD4, filter capacitor Cl - C3 and three-terminal integrated regulator IC1,IC2. The Input comparison circuit consists of resistors Rl,potentiometerRPl - RP9, capacitorsC6 - Cl4 and N1- Ng within integrated circuit lC3-1C5 of operational amplifiers .The Coding control circuit consists of NOT gate integrated circuitIC6 -1C8 , NAND gate integrated circuit IC9, IC10，glaze diode VD8 - VDl5， resistorsR4 - Rll and capacitors C15 -C22 .The compensating output circuit consists of integrated circuit ICl (Sl - S4), ( IC17S5 - S8) of electronic switch ,thyristor VTl-VT8, main compensating transformer Tl, assistant compensating transformer T2, AC contactors KM and voltmeter PV, ammeter PA .The over-voltage/under-voltage protection circuit consists ofNOT gate D9 witin IC7 , diodes VD5 - VD7, resistors R2, R3, transistor V and relay K.The assistant compensating transformer is a bodying transformer, which would provide different primary voltages to fulfill different second compensating voltages of T1 .



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