SU628477A1

SU628477A1 - Dc voltage supply source

Info

Publication number: SU628477A1
Application number: SU772472860A
Authority: SU
Inventors: Вячеслав Антонович Кусков; Олег Николаевич Красников
Original assignee: Предприятие П/Я А-7160
Priority date: 1977-04-11
Filing date: 1977-04-11
Publication date: 1978-10-15

Description

Изобретение относитс к электротехнике и может быть использовано в цеп х питаии различной раднотехнической аппаратуры .This invention relates to electrical engineering and can be used in the power circuits of various radio technical equipment.

Известны источники питани посто нно го напр жени l 2.Food sources of constant voltage l 2 are known.

Первое из известных устройств содержит стабилизированный преобразователь напр жени с выходным трансформа тором, выходной выпр митель и фильтр, цепь обратной св зи по выходу, состо щий из схемы управлени и устройства гальванической разв зки входа и выхода.The first of the known devices comprises a stabilized voltage converter with an output transformer, an output rectifier and a filter, an output feedback circuit comprising a control circuit and a device for galvanic isolation of input and output.

Второе из известных устройств, вл ющеес наиболее близким техническим решением к данному изобретению, содержит регулирующий элемент, входом поаключен- ный к первой входной клемме, а выходом ко входу преобразовател , выход которого соединен с первичной обмоткой первого трансформатора, вторична обмотка этого трансформатора подключена через выпр митель к сглаживающему фильтру, выход которого соединен с выходными клеммами И первым входом блока управлени , который через узел гальванической раэвазки подключен к управтг ющему входу регулирующего элемента, и второй трансформ тор ,The second known device, which is the closest technical solution to this invention, contains a regulating element, the input is connected to the first input terminal, and the output to the input of the converter, the output of which is connected to the primary winding of the first transformer, the secondary winding of this transformer is connected via rectifier the driver to the smoothing filter, the output of which is connected to the output terminals AND to the first input of the control unit, which is connected to the control input of the control unit through the galvanic ravazki node Uhlir element and second transforms torus,

Недостатком этих устройств вл ет с малое быстродействие и стабильность при резком изменении входного напр жени , что св зано с запаздыванием обрабрт ки сигнала ошибки из-за наличи в аепиThe disadvantage of these devices is the low speed and stability with an abrupt change in the input voltage, which is due to the delay in processing the error signal due to the presence of

передачи накопительного фильтра, обладав ющего большой посто нной времени.transmitting a cumulative filter having a long time constant.

Целью изобретени вл етс увеличение быстродействи и повышение стабильности .The aim of the invention is to increase speed and increase stability.

Claims

The goal is achieved by the fact that a compensating voltage node, a divider, a modulator, a demodulator and a filter are additionally introduced into the DC power source, the input of the compensating voltage node being connected to the first input terminal, and the output to one of the inputs the divider, the second input of which is connected to the second input terminal, the output of the divider is connected to the input of the modulator, the output connected to the primary winding of the second transformer, the secondary winding of which is connected through a series of demodulator and filter By connecting to the second input of the control unit. The increase in speed when changing the input voltage and increasing the stability of the output voltage of the devices in the proposed scheme is achieved by transmitting the input voltage disturbances to the control unit through a circuit having a shorter time constant (a; therefore contributing to a smaller delay),. compared to the power circuit, due to the high modulation frequency. The drawing shows a block diagram of the proposed power source. The source contains a DC / AC converter 1 with an output transformer 2 and a regulating element 3 at the input, a rectifier 4 with a smoothing filter 5, a control unit 6, a galvanic isolation unit 7 and a direct connection to the input source a marriage consisting of a compensating voltage node 8, a voltage divider 9, a modulator 1O, a transformer 11, a demodulator 12, and a filter 13. The voltage value of the compensating voltage node S to decrease the magnitude of the constant component modulator 12 choose with no more than a minimal value of the input voltage source voltage. On the voltage cell 9, a voltage equal to the difference of the voltages of the sources of the applied and compensating voltages is indicated. For the liver of galvanic isolation in the direct circuit, its differential voltage is modulated (converted to AC) by the modulator 1O and transmitted through the transformer 11 to the demodulator 12. The output voltage of the demodulator 12 is fed through a filter 13 to one of the inputs of the unit control 6. The change in the voltage of the input voltage source is proportional to the change in pressure on the filter 13 and, consequently, on the corresponding input of the control unit 6, and through the galvanic isolation node 7, the control signal proportional to It changes the input voltage and acts on the regulating element 3. Transmission of this disturbance to the input occurs along a direct connection circuit with a much smaller delay, since the frequency of the modulator 1O is chosen no less than 5–10 times greater than with the frequency of conversion of the main sludge part, and therefore the constant time of the direct connection chain, no less, it is 5–1 times smaller than the total time of the power circuit. Thus, the proposed device, in comparison with the known, allows to increase the speed of the circuit when the voltage of the input voltage source changes and by 5-1O times to reduce the change in the output voltage of the power source when the voltage of the input voltage source changes abruptly, due to input voltage disturbances in a direct connection circuit with a small delay, determined by the frequency of the modulator, which can also be chosen arbitrarily large. The formula of the invention and the power source of a constant voltage, containing a regulating element with an input connected to the first input terminal, and an output to the converter head, the output of which is connected to the primary winding of the first transformer, the secondary winding of this transformer is connected to the filter, the output of which is connected to the gate terminals and the first input of the control unit, which is connected to the control input of the regulating element and the second rail A transformer, characterized in that, in order to increase speed and increase stability, a compensating voltage node, a divider, a modulator, a demodulator and a filter are additionally introduced into it, the input of the compensating voltage node being connected to the first input terminal, and the output with one of the inputs of the divider, the second input of which is connected to the second input terminal, the output of the divider is connected to the input of the modulator, the output connected to the primary winding of the second transformer, the secondary winding of which is connected in series Inonii demodulator and a filter connected to the second input of the control unit. Sources of information taken into consideration in the examination: 1. US Patent No. 37О1937, 321-2, 1972.

2. US patent number 38183O6, 321-2, 1974.