SU864265A1 - Ac voltage stabilizer - Google Patents

Description

(54) AC VOLTAGE STABILIZER

one

The invention relates to electrical engineering, and more specifically to electromagnetic technology, to automation devices, and can be used to stabilize the voltage when powering electrical and radio devices.

Known ferroresonant stabilizer, containing a linear element and a nonlinear choke with a capacitor and windings compensation P 1.

The disadvantages of this device are a lot of weight, low QDC and distortion of the current waveform.

Closest to the proposed device is a device that contains two transformers, four relays, two higher voltages, four variable resistors and a fuse 2.

Its disadvantages are a significant mass, the magnitude of which is determined by the presence of two transformers, the overall power of which is equal to the output power of the stabilizer and, consequently, the high metal intensity of the structures is 0.025 kg / VA; low QDC - 95%, which is explained by the need to feed a large number of control elements and losses in transformers with large overall power; energy consumption during the shutdown period of the load, which complicates its operation, leads to the rapid destruction of the network

10 sockets and cord, and also reduces efficiency.

The purpose of the invention is to increase efficiency, reduce weight and size parameters and increase reliability.

The goal is achieved by

IS that a current transformer is inserted in it, the primary winding of which is connected between the first input terminal and the first output of the secondary winding of the first transformer, and the secondary winding

20 is connected to the input of the input additional mittel, the output of which is connected to the solenoid of the entered reed switch, the second output of the secondary winding of the first transformer is connected to the first output terminal, the beginning of the first primary winding of the first transformer is connected to the second output and input terminals, and the end of this winding is connected through the closing the contact of the first contact group of the first relay to the beginning of the second primary winding, which, in turn, through the opening contact of this contact group is connected to the first the output of the secondary winding of the first transformer, the end of the second primary winding is connected via the opening contact of the first group of the second relay and the first output terminal, and through the closing contact of this contact group to the second output terminal, the beginning of the primary terminal of the second transformer is connected to the first input terminal, the end through the fuse is to the second output terminal, the first secondary winding of the second transformer is connected to the input of the first rectifier, the output of which is through a chain of first second variable group of the first relay, and the second resistor are connected to the winding of the third relay, and through the chain of the third variable resistor shunted by the disconnecting contacts of the second contact group of the second relay, and the fourth variable resistor is connected to the winding of the fourth relay, the second secondary winding of the second transformer is connected to the input of the second rectifier, one output terminal of which is connected to the first terminals of the windings of the first and second relays, and toro terminal of the first relay is connected through the break contacts of the third relay to the other output terminal of the second rectifier, which also through the closing contact of a relay connected chertvertogo second terminal of the second winding

relay.

FIG. 1 is a schematic diagram of a stabilizer; 2 (a, b, c) is a circuit for turning on the windings of the first transformer at various mains voltages, making it possible to use relays for voltage regulation purposes,

The stabilizer includes a Current transformer 1, the primary winding of which is connected in series to the circuit.

The wiring is connected to the load, and is secondary to rectifier 2, which supplies voltage to the solenoid 3 of the reed switch 4, the contacts of which include the primary winding of the transformer 5, rectifier 6 of the relay power only when current flows through the primary winding, when the load is on.

In the absence of load, the rectifier 6 of the power supply relay is not turned on and the windings of the transformer 5 are turned on (Fig. 2b), i.e. The stabilizer is converted into a low impedance connection device that does not consume power from the network.

When a load of 40 V or more is turned on, the reed switch connects the primary winding of the transformer to the power supply rectifier and the relay is energized.

During stabilizer operation with a voltage of 200-230 V, relay 7 is interrupted and contacts 8 open the power supply circuit of the second relay 9, the second contact group 10 of which opens the variable resistor 11, as a result of which the current in the winding of the relay 7 decreases to a value close to the current releasing, so reducing the network voltage to 198 volts causes the relay to release 7.

The windings of the first transformer are connected (Fig. 2b) in antiphase and the voltage at the output of the stabilizer is equal to the supply voltage.

When the supply voltage exceeds 231 V, relay 12 trips, contacts 13 close and relay 14 operates, the first transformer switches for operation (Fig. 2c), and the voltage of the secondary winding is subtracted from the supply voltage and at the output of the stabilizer the voltage is equal to the voltage network minus 10%. When the relay 14 trips, the contacts 15, shunting the first variable resistor 16, open, and the current through the winding of the relay 12 is set such that when the supply voltage drops to 229-230 V, the relay core is lowered, and therefore the relay 14 is turned off and the stabilizer switches to work in the mode of 200-230 V.

When the network voltage drops to 198 V, the relay core 7 is lowered, which leads to switching on the relay 9 and switching the windings of the first transformer 21 (Fig. 2a)

Claims (2)

The voltage at the output of the stabilizer is equal to the network voltage plus 13%. To the windings of the third and fourth relays, capacitors 17, 18 are connected, increasing the response and release times of the relay. Pins 19, 20 are protected by sparkling chains. Switching the stabilizer to operation with a voltage of 127 V is made by switching the primary winding of the second transformer. The present invention allows to obtain a device with high efficiency with reduced weight and size indicators and to increase reliability due to the fact that there is no energy consumption during the shutdown period. Moreover, due to a decrease in the number of variable elements, the cost of the product is reduced. Claims An alternating voltage stabilizer containing two transformers, four relays, two rectifiers, four variable resistors and a fuse, characterized in that, in order to increase efficiency, reduce mass and size parameters and increase reliability, a current transformer is inserted into it, the primary winding which is connected between the first input terminal and the first output of the secondary winding of the first transformer, and the secondary winding is connected to the input of the introduced additional terminal, the output of which is connected To the solenoid of the entered reed switch, the second secondary winding of the first transformer is connected to the first output terminal, the first primary winding of the first transformer is connected to the second output and input terminals, and the end of this winding is connected through the closing contact of the first contact group of the first relay to the beginning of the second primary winding which in turn. 656 through the break contact of this contact group is connected to the first output of the secondary winding of the first transformer, the end of the second primary is connected through the break contact of the first contact group of the second relay to the first output terminal, and through the closing contact of this contact group to the second output terminal, the beginning of the primary winding of the second transformer through the contacts of the reed switch connected to the first input terminal, the end through the fuse to the second output terminal, the first secondary winding of the second transformer By connecting to the input of a first rectifier, the output of which through a chain of the first variable resistor shunted break contacts the second contact of the first relay group and a second variable resistor connected to the coil of the third relay. through a chain of the third variable resistor shunted by the opening contacts of the second contact group of the second relay, and the fourth variable resistor is connected to the winding., the fourth relay, the second secondary winding of the second transformer is connected to IKCHOHN4 of the second rectifier, one output terminal of which is connected to the first terminals of the first winding and the second relay, and the second output of the first relay is connected via the disconnecting contacts of the third relay to another output terminal of the second top, where also through the closing e contacts of the fourth relay connected to the second winding terminal of the second relay. Sources of information taken into account in the examination. Bogdanov D.I. Ferroresonant voltage regulators. M., Energie, 1972, p. 8-P. 2. Kuzinets L.M. Rymanov E.A. Additional equipment and accessories for TVs. Publishing House of Holy H. 1970, p. 7-And. A Network