SU800986A1 - Ac voltage stabilizer by effective value - Google Patents

Description

The invention relates to electrical engineering and can be used to power filament circuits in radar stations.

A device is known that contains two multivibrators, a saturation inductor, a transformer and a voltage-period converter [1].

Closest to the proposed one is a stabilizer, which contains a regulating element made on a throttle with a control winding and a bias winding and connected between the corresponding input and output terminals, a bias voltage source, the negative terminal of which is connected to the end of the bias winding, a variable resistor and a transformer, a primary winding which is connected in parallel with the output terminals, and the secondary winding, made with a midpoint, is connected to the input of the rectifier [2].

A disadvantage of the known devices is the low stability of the output voltage.

The purpose of the invention is to increase the stability of the output voltage without compromising efficiency.

This goal is achieved by the fact that a thermostable quadratic detector, the input of which is connected to the midpoint of the secondary winding of the transformer, and the output is connected to the end of the control winding pein of the gating element, the beginning of which is connected to the output of the rectifier, is inserted into the known AC voltage stabilizer by the effective value, plus the bias voltage source is connected through the variable resistor to the beginning. the bias windings of the regulating element, wherein the quadratic detector contains a capacitor η-parallel chains, each of which consists of a resistor and p-1 zener diodes connected in series with it, and a 20-key capacitor parallel to the control winding of the regulating element.

The drawing shows a circuit diagram of an AC voltage stabilizer at 25 effective value.

The effective value of the AC voltage stabilizer contains a regulating element 1, for example, a magnetic amplifier having in its composition 30 working windings 2 and 3, control windings 4 and bias 5, internal feedback diodes 6 and 7, a transformer 8, the primary winding of which is connected in parallel the output of the AC voltage stabilizer by the effective value, the rectifier on the diodes 9 and 10 is connected to the secondary winding. The anodes of the rectifier diodes 9 and 10 are connected to the beginning of the control winding 4, the end of which is connected to the output m of a quadratic detector 11, the input of which is connected to the midpoint of the secondary winding of the transformer 8. The quadratic detector 11 consists of n-parallel chains: the first consists of a resistor 12, the second chain 13 consists of a resistor 14 and a zener diode 15 connected in series with it, the third chain 16 - from a resistor 17 connected in series with two zener diodes 18 and 19 connected in series, the nth chain 20 - from a resistor-21 connected in series with cn-1 zener diodes 22 and 23 connected in series. At the output of the quadratic detector 11 there is a capacitor 24, one output of which is connected to the output of the detector, and the other output is connected to the anodes of the rectifier diodes 9 and 10. Plus source voltage. Zhenya bias 25 is connected through a variable resistor 26 to the beginning of the bias winding 5 of the control element 1, the end of which is connected to the minus of the bias voltage source 25.

The AC voltage stabilizer for the effective value works as follows.

With increasing output voltage, the current flowing through the quadratic detector 11 increases according to the law of the quadratic parabola, which is proportional to the change in the effective value of the output voltage. The capacitance of the capacitor 24 integrates the change signal obtained at the output of the quadratic de-sector 11, so that the voltage across the capacitor 24 changes in proportion to the effective value of the output voltage. The control winding 4 is connected in series with the quadratic detector 11; therefore, the same flows through the control winding 4 _; as through the quadratic detector 11, an increasing current, which in turn leads to an increase in the voltage drop across the working windings 2 and 3 of the control element 1 and to a decrease in the output voltage.

Claims (2)

(54) an AC voltage regulator FOR EFFECTIVE VALUE controlling coils 4 and 5 biasing diodes internal feedback 6 and 7, a transformer 8 whose primary is connected -parallel vyho do AC voltage stabilizer, neither of the effective value, to Auto ary winding connected rectifier diodes 9 and 10, anodes of diodes 9 and 10 rectifier connected to the beginning of the control winding 4, the end of which is connected to the output of a quadratic detector 11, the input of which is connected to the midpoint of the secondary winding of the transformer 8 The quadratic detector 11 consists of n-parallel chains: the first consists of resistor 12, the second chain 13 is from resistor 14 and zener diode 15 connected in series with it, the third chain 1 from resistor 17 is connected in series with two Zener diodes 18 and 19 connected. sequentially, the p-and chain 20 of resistor 21, connected in series by ch-1 by zener diodes 22 and 23 connected in series. At the output of the quadratic detector 11 there is a capacitor 24, one output of which is connected to the output of the detector, the other output to the anodes of diodes 9 and 10 of the rectifier. The bias voltage source 25 is connected via a variable resistor 26 to the beginning of the bias winding 5 of the regulating element 1, the end of which is connected to the bias source of the bias voltage 25. The variable voltage stabilizer operates on the following way. With an increase in the output voltage, the current flowing through the quadratic detector 11 increases according to the law of the quadratic parabola, which is proportional to the change in the effective value of the output voltage. The capacitor 24 capacitance integrates the resulting quadratic yes-; of the change signal, so the voltage on the capacitor 24 varies in proportion to the effective output voltage. Control winding 4 is connected in series with quadratic detector 11, therefore through control winding 4 flows the same as through quadratic detector 11, increasing current, which in turn, it leads to an increase in the voltage drop across the working windings 2 and 3 of the regulating element 1 and to a decrease in the output voltage. Claims of an alternating voltage stabilizer with an effective value, comprising a regulating element formed on a choke with a control winding and an bias winding and connected between the respective input and output terminals, a bias voltage source, the negative terminal of which is connected to the bias end of the bias variable resistor and transformer The primary winding of which is connected in parallel to the output pins, and the secondary winding, made with a midpoint, is connected to the input of the rectifier, it is different In order to increase stability without deteriorating the efficiency, a thermally stable quadratic detector is inserted into it, the input of which is connected to the middle point of the secondary winding of the transformer, and the output is connected to the end of the control winding of the regulating element, the beginning of which is connected to the output of the rectifier, the positive output the bias voltage source is connected through a variable resistor to the beginning of the bias winding of the regulating element, and the quadratic detector contains a capacitor of n-parallel circuits, each of which The circuit consists of a resistor and p-1 zener diodes connected in series with it, and a capacitor connected in parallel to the control winding of the regulating element. Sources of information taken into account during the examination 1. USSR author's certificate No. 535560, cl. G.05 P 1/56, 1976, 2. USSR author's certificate number 377754, cl. G05 F 3/04, 1978, VBM.