SU1191891A1 - A.c.voltage stabilizer - Google Patents

Abstract

AC VOLTAGE STABILIZER containing the first choke, connected between the first input and output pins, a capacitor connected between the first and second output pins, a series circuit consisting of a second throttle and two anti-parallel thyristors connected to the control unit, one output connected to the second output terminal, characterized in that, in order to reduce the mass and volume, the first throttle is provided with an additional winding connected in accordance with the main winding between the first input terminal ode and other output of the specified serial circuit.

Description

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The invention relates to electrical engineering and is intended to supply electrical equipment with stabilized and controlled alternating voltages.

The aim of the invention is to reduce the mass and volume of the stabilizer.

The drawing shows an electrical circuit of a voltage regulator.

The alternating voltage stabilizer contains the first choke 1, the main winding 2 of which is connected to the first output with the first input output, and the second output to the first output of the additional winding 3 and output output. The second terminal of the winding 3 is connected to the first terminal of the winding of the second drossel 4, the second terminal of which is connected to the anti-parallel connected thyristors 5 and 6. The other output of the circuit from the anti-parallel connected thyristors is connected to the second input and output terminals. A capacitor 7 is connected between the first and second output pins, the output control node 8 is connected to the control electrodes of the thyristors 5 and 6, and the inputs to the output pins.

The stabilizer works as follows.

The alternating voltage of the primary source is fed to the input pins. The choke 1 and the capacitor 7 form a circuit whose natural frequency is close to the frequency of the input voltage. The control unit 8 controls the phase of switching on the thyristors 5 and 6. In this case, the larger the nominal value of the output voltage, the longer the thyristors 5 and 6 turn on, which leads to a decrease in the output voltage. The reference voltage setting in the control node 8 is variable, the output voltage can be adjusted. by changing the thyristor switching phase. When a capacitor discharge current occurs, through the additional winding 3, the second choke 4 and the parallel-connected thyristors 5 and 6, self-induced EMF occurs, which prevents an increase in the discharge current. The occurrence of the discharge current causes an additional voltage drop across the main winding 2 droplets 1. An additional voltage drop, equal to U fMT, linearly depends on the discharge current of the capacitor, where and is the voltage drop

winding 2 droplets 1, due to the EMF of mutual induction; SU - circular frequency; M is the coefficient of mutual induction between the main winding 2 and the additional winding 3. Since the main 2 and additional 3 windings are included according to,

the occurrence of mutual induction emf causes a decrease in the capacitor current. Therefore, when the load current decreases, the input voltage increases, the output voltage is adjusted below the nominal value, causing an increase in the discharge current of the capacitor, the latter increases significantly less than in the prototype. By selecting the turns of the main 2 and additional 3 windings, the discharge current of the capacitor can also be reduced. Therefore, the dimensions of the core of the second throttle 4 can be reduced.

Thus, the device allows to significantly reduce the dimensions of the second throttle while maintaining the weight and dimensions of the remaining stabilizer elements,

This reduces the mass and volume of the stabilizer as a whole.

Claims (1)

CHANGE STABILIZER NO VOLTAGE containing a first inductor connected between the first input and output terminals, a capacitor connected between the first and second output terminals, a series circuit consisting of a second inductor and two counter-parallel connected thyristors with a control unit, one output connected to the second output output, characterized in that, in order to reduce the mass and volume, the first inductor is equipped with an additional winding included in accordance with the main winding between the first input terminal and another output of the decree Noah daisy chain.