SU729570A1

SU729570A1 - Stabilized dc source

Info

Publication number: SU729570A1
Application number: SU782617739A
Authority: SU
Inventors: Валерий Тимофеевич Тарасов
Original assignee: Предприятие П/Я Г-4695
Priority date: 1978-05-10
Filing date: 1978-05-10
Publication date: 1980-04-25

Description

(54) СТАБИЛИЗИРОВАННЫЙ ИСТОЧНИК ПОСТОЯННОГО ТОКА(54) STABILIZED DC SOURCE

1one

Изобретение относитс к электротехнике и может быть использовано, например, дл питани устройств гальванотехники.The invention relates to electrical engineering and can be used, for example, to power electroplating devices.

Известны стабилизированные источ- 5 НИКИ питани , содержащие выпр митель с фильтрсм, регулирующий узел в первичной цепи переменного тока, узел обратной св зи (1J.There are known stabilized power supply sources containing a rectifier with a filter, a regulating node in the primary AC circuit, a feedback node (1J.

Наиболее близким к изобретению Ю техническим ранением вл етс стабилизированный источник посто нного тока, содержащий трехфазный силовой трансформатор, начала первичных обмоток которого соединены,с входными |5 выводами источника, силовой выпр мительный мост, выход которого соединен с выгодными выводами источника, а вход - с началами вторичных обмоток трансформатора, регулирующий 20 узел, выходом соединенный через вспомогательный выпр мительный мост с концами первичных обмоток трансФорматора , усилитель посто нного тока цепи обратной св зи, выходом 25 соединенный со входом регулирующего узла, измерительный узел, состо щий из датчика тока нагрузки, преобразовател напр жени , выпр мительн9го моста, делител напр жени преобра- 30The closest to the invention of Yu technical injury is a stabilized DC source containing a three-phase power transformer, the onset of the primary windings of which is connected to the input | 5 source terminals, a power rectifying bridge, the output of which is connected to the profitable source terminals, and the input the beginnings of the secondary windings of the transformer, the regulating node 20, the output connected via an auxiliary rectifying bridge to the ends of the primary windings of the transformer, the DC amplifier of the circuit hydrochloric communication output 25 coupled to the input of the regulating unit, a measuring unit consisting of a load current sensor, voltage transformer, rectifying miteln9go bridge voltage divider 30 transformed

зовател , источника опорного напр жени , причем вход преобразовател напр жени соединен с датчиком тока нагрузки, а выходы делител напр жени и источника опорного напр жени соединены со входом усилител посто нного тока 2.the receiver, a voltage source, the input of the voltage converter connected to the load current sensor, and the outputs of the voltage divider and the voltage source connected to the input of the DC amplifier 2.

Heдocтaткa tи известных устройств . вл ютс большие габариты и инерционность из-за наличи выходного фильтра.Devices are known devices. are large size and inertia due to the presence of the output filter.

Цешь изобретени - умёныпение габаритов и инерционности источника .The invention is based on the size and inertia of the source.

Claims

This is achieved by the fact that in a stabilized source of direct current, the voltage converter is made in the form of a three-phase measuring transformer with a star connecting the ends of the primary and secondary windings, and a load current sensor on three resistors, and some of the terminals of the resistors are interconnected and the others pins of Lodklyucheny resistors respectively to the ends of the secondary windings of the power transformer and the beginnings of the primary windings of the measuring transformer, the beginnings of the secondary windings of which through auxiliary gatelny rectifier bridge is connected to the inlet 1y voltage divider. The drawing shows a circuit diagram of a stabilized DC source. It contains a three-phase power transformer 1, a measuring step-up three-phase transformer 2, a load current sensor on resistors 3, 4 and 5 included in the zero phase of the secondary windings of transformer 1, auxiliary rectifying bridges b and 7, voltage divider 8, transistor regulating node 9 , DC amplifier 10, the reference voltage source 11, the power rectifying bridge 12. The stabilized DC source works as follows When increasing the supply voltage or decrease the load resistance The load voltage increases at the resistors 3, 4 and 5 of the load current sensor, which is increased by the transformer 2, is rectified by washing the power supply 7 and is fed through the voltage divider to the input of the DC amplifier 10. The latter, depending on the deviation from the reference value reduces the conductivity of the regulating node, which leads to a decrease in the voltage on the primary windings of the power transformer I and, consequently, to a decrease in the voltage on the secondary windings, resulting in a load current value and, therefore, The voltage across resistors 3, 4 and 5 is reduced to a predetermined value with an accuracy determined by the gain of the feedback circuit. This circuit allows one to reduce the output current ripple several times and, thus, in a number of cases, dispense with the cumbersome power filter, which also leads to a decrease in the inertia of the source. The stabilized DC source is easily converted to a DC source. To do this, it is enough to remove the resistors 3, 4 and 5, connect the ends of the secondary windings of the trans Formator 1, and connect the beginnings of the primary windings of the measuring transformer 2 to the beginnings of the secondary windings of the power transformer 1. Claims of the invention A stabilized DC source containing a three-phase power transformer The beginnings of the primary windings of which are connected to the input pins of the source, the power rectifying bridge, the output of which is connected to the output pins of the source, and the input to the beginnings of the secondary a coil, a regulating node, an output connected via an auxiliary rectifying bridge to the ends of the transformer primary windings, a DC amplifier of the feedback circuit, an output connected to the input of the regulating node, a measuring node consisting of a load current sensor, a voltage converter, rectifying the bridge, the voltage divider of the converter, the source of the reference voltage, the input of the voltage converter connected to the load current sensor, and the outputs of the voltage divider and the source of the reference voltage connected to the input of a DC amplifier, characterized in that, in order to reduce the size and inertia of the source, the voltage converter is made in the form of a three-phase measuring transformer with a connection of the ends of the primary and secondary windings according to the star circuit, and the load current sensor on three resistors , and one of the terminals of the resistors are interconnected, and the other terminals of the resistors are connected respectively to the ends of the secondary windings of the power transformer and the primary windings of the measuring transformer of the inverter / start of the secondary windings of which is connected via an auxiliary rectifying bridge to the input of the voltage divider. Sources of information taken into account during the examination 1. Belopolsky I.I., Tikhonov V.I. Transistor stabilizers for high and high voltages. M., Energia 1971. 2 t Factsheet No. 73-0276 IL-11.73-.0276 ./. K.1 / 1007.