SU1539752A1 - Variable power stabilizer - Google Patents

Abstract

The invention relates to secondary power sources of radio equipment. The aim of the invention is to expand the stabilization range and increase the accuracy of power measurement at the load. The goal is achieved by introducing into the control circuit of two analogue converters — code 14 and 17, two current amplifiers 15 and 16, and two voltage amplifiers 18 and 19. When the current and voltage on the load change, a synchronous change occurs in the transmission coefficients of amplifiers 15, 16 and 18, 19. This eliminates a significant change in the multipliers at the inputs of the multiplier 20. As a result, the influence of the multiplier nonlinearity on the stabilization factor and the accuracy of the power measurement at the load is reduced. 1 hp ff, 2 ill.

Description

figl

The invention relates to electrical engineering and can be used in power sources with adjustable power stabilization at a load varying within wide limits, for example, electrophoretic fission chamber.

The purpose of the invention is to expand the power feedback unit 13. The amplified error signal between the set and the current power values from the output of the amplifier 11 is fed to the input of the comparator 9, which controls the regulating element 3, the output of which provides the required output power at

the stabilization zone and the increase in the JQ load by adjusting the duty ratio of the power measurement at the load; Fig. 1 shows a functional diagram of a stabilized power source; Fig. 2 shows a variant of the functional diagram of the power feedback unit.

 The adjustable power regulator contains a rectifier 1, an input connected to the output terminals, a filter 2, a regulating element 3 providing the required output power, an LC filter 4 for filtering the output voltage, a voltage sensor 5, a current sensor 6, a load 7 connected to the output pins, adder 8, comparator 9, sawtooth generator 10, feedback amplifier 1, adjustable support element 12, power feedback unit 13, including analog-to-code converter 14, force Variable-current transmitters 15 and 16, analog-to-code converter 17, variable-voltage amplifiers 18 and 19, multiplier 20, and power meter 21.

The power feedback unit (FIG. 2) contains an operational amplifier 22, a resistor 23, large-scale resistors 24-1 ... 24-p, controllable switches 25-1.c.25-p, an operational amplifier 26, resistor 27 , scale resistors 28-1 ... 28-p, controllable keys 29-1 .., 29-n, operational amplifier 30, resistor 31, scale resistors 32-1,., 32-n, controllable switches 33- 1 ... ZZ-n, operational amplifier 34, resistor 35, large-scale resistors 36-1 ... Zb-n, controlled keys 37-1 ..t37-n,

Adjustable power regulator works as follows

From the adjustable support 12, a voltage is applied that is proportional to the power to be stabilized at the load, to one ich rokhod the amplifier 11 of the reverse fit, and to the other from the output

nosti. If the change in the signal from the voltage sensor from the output of the adder 8 does not exceed a certain value, then the output of the converters

5 analog - the code is generated by the position code, in which the keys 25-1, 29-1,33-1 and 37-1 are closed, and 25-2 ...,., 25-n, 29-2 ... 29- p, 33-2 ... 33-p and 37-2 ... 37-p open, at the same time.

0 the gain of the amplifiers 15, 16, 18 and 19 is, for example, -1.

At the output of the power feedback unit 13, we have

5 (uT.K, 5 (VK, e) .K, -K, 9,

where T1t, in

0

five

п „к, K1t, к16

and K,

0

five

0

voltage output from the current sensor and voltage sensor, respectively; the output voltage of the power feedback unit 13;

multiplier gain 20;

nineteen

the transmission coefficients of amplifiers are 15, 16, 18, and 19, respectively.

The gain transfer factors of the amplifiers are chosen so that, with any change in the current and voltage signals, the relations:

 -K, fc const;

K, in- Kw const,

t, e, the current signal amplifier 16 performs the inverse function of the amplifier 15, and the voltage signal amplifier 19 performs the inverse function of the amplifier 18,

When changing, for example, decreasing the current, i.e. UT is less than a certain value, the converter 14 analogue - the code generates a signal at which synchronous opening of the key 25-1 and closing of the switch 25-2 in the amplifiers 15 occur and - synchronous opening of the switch 33-1 and closing of the switch 33-2 in the amplifier 16. When this changes (increases) the transmission coefficient of the amplifier 15 and decreases the transmission coefficient of the amplifier 16 by the same amount, i.e. To (5 К1Ь 1, the transmission coefficient of the power feedback unit 13 remains the same. With a further decrease in UT, a further synchronous change in the transmission coefficients of the amplifiers 15 and 16 occurs.

When voltage changes, IIu less

g

of a certain value, the analogue converter 17 — the code generates a positional code, at which a synchronous change of the transmission coefficients in the voltage channel of the amplifiers 8 and 19 occurs due to the operation (opening and closing) of the keys 29 and 37.

With a joint change in the values of II and Uu, synchronous

Mr. N

a change in the transmission coefficients of amplifiers 15 and 16 in the current channel and amplifiers 18 and 19 in the voltage channel. This technical solution makes it possible to exclude a significant change in the factors at the inputs of the multiplier 20, thereby reducing the influence of the non-linearity of the multiplier on the stabilization factor and the accuracy of power measurement at the load,

Claims (2)

1. Adjustable power regulator containing a rectifier, the input connected to the input terminals, and the output through the filter to the input of the regulating element, the output of which through the LC filter and the current sensor connected in series with it is connected to the output terminals, the control input of the regulating element with the output of a comparator, one of the inputs of which is connected to the output of a sawtooth generator, and the other with the output of a feedback amplifier, one of the inputs of which is connected to an adjustable support element, to you The LC sensor is connected to a voltage sensor input, the output of which is 15. 1539752 It is connected to the first input of the adder, the second input of which is connected to the output of the current sensor and multiply, characterized in that, in order to expand the stabilization range and increase the accuracy of power measurement at the load, it is equipped with two analog-to-code converters, TWO current amplifiers with an adjustable transmission coefficient, two voltage amplifiers with an adjustable transmission coefficient, the current sensor output being connected to the input of one of the analogue converters - the code and to the input of one of the current amplifiers, the output of which is connected to one of the multiplier inputs, the output of the adder is connected to the input of another converter analogue – code and with the input of one of the voltage amplifiers whose output is connected to another input of the multiplier, the output of the latter is connected to the input of the other l 5 current, the output of which is connected to the input of another voltage amplifier, the output of which is connected to another input of the feedback amplifier, the control inputs of the current amplifiers are connected to the output of the first of the analog-to-voltage converters, the control inputs of the voltage amplifiers are connected to the output of the second from analogue converters - code for this KIi KTi const; five 0 five TO where KT1, K U (Ku const, one Chg KSh K ig. 0 adjustable transmission ratios of one and another current amplifiers, respectively adjustable gains of one and the other voltage amplifiers, respectively, 2. A stabilizer according to claim 2, characterized in that it is provided with a power meter connected in parallel to another input of the feedback amplifier. g , TF / r 1 $ -PG No. lh-i Compiled by S. Chernysheva Editor M. Petrova Tehred M. Didyk Proofreader V. Girn to 1P order Circulation 637 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Fi & .g Subscription