SU853620A1

SU853620A1 - Device for regulating alternating current

Info

Publication number: SU853620A1
Application number: SU792782850A
Authority: SU
Inventors: Константин Павлович Алексахин; Арвид Антонович Юргенс
Original assignee: Предприятие П/Я А-7306
Priority date: 1979-06-18
Filing date: 1979-06-18
Publication date: 1981-08-07

Description

(54) УСТРОЙСТВО ДЛЯ РЕГУЛИРОВАНИЯ ПЕРЕМЕННОГО ТОКА(54) DEVICE FOR REGULATING AC VOLTAGE

II

Изобретение относитс к области электротехники и может быть использовано , например, в блоках питани накала мосцных электровакуумных приборов .The invention relates to the field of electrical engineering and can be used, for example, in power units for the heating of mosquito vacuum tubes.

Известны устройства дл регулировани переменного тока, содержащие трансформатор с управл ющими и силовыми обмотками ij и 2 .Devices for regulating alternating current are known, comprising a transformer with control and power windings ij and 2.

Наиболее близким к предлагаемому вл етс устройство, содержащее трансформатор с четырехстержневым магнитопроводом, имеющий обмотки управлени , первичные обмотки, расположенные на центрсшьном стержне, и вторичную обмотку/ расположенную н основном боковом стержне магнитопровода 2 .Closest to the present invention is a device comprising a transformer with a four-core magnetic core, having control windings, primary windings located on a center rod, and a secondary winding / located on the main side core of the magnetic circuit 2.

Однако при включении нагрузки в известном устройстве наблюдаютс броски тока, которые в отдельных случа х могут привести к выходу ее из стро (р частности, при включении на холодный катод электровакуумных приборов) , а следовательно, к недостаточной надежности и низкому качеству регулировани .However, when a load is turned on, current surges are observed in the known device, which in some cases can lead to its release (especially when switching on vacuum cathodes of electrovacuum devices) and, consequently, to insufficient reliability and poor quality of regulation.

Целью изобретени вл етс повышение нсщежности и качества регулировани .The aim of the invention is to improve the accuracy and quality of regulation.

Поставленна цель достигаетс тем, что трансформатор снабжен обмоткой обратной св зи, котора размещена на; одном стержне со вторичной обмоткой трансфсфматора, что обеспечивает плавное нарастание тока нагрузки от. нул до требуемого значени в зависимости от ее сопротивлени .The goal is achieved by the fact that the transformer is provided with a feedback winding which is placed on the; one rod with the secondary winding of the transformer, which ensures a smooth increase of the load current from. zero to the desired value depending on its resistance.

На.чертеже приведена функциональ10 на схема устройства, содержащг1 трансформатс 1, вспомогательные 2, 3, центральный 4 и основной боковой 5 стержни магнитопровода трансформатора 1, соответственно обмогки б, 7, The drawing shows the functional 10 on the device diagram containing 1 transformer 1, auxiliary 2, 3, central 4 and main lateral 5 rods of the transformer 1 magnetic circuit, respectively, b, 7,

15 ;8 управлени , рекуперации и обратной св зи, первична 9 и вторичные 10 обмотки трансформатора 1; усилитель 11, выпр митель 12 усилител 11; фазочувствительиый выпр митель 13; на20 грузка 14, входные 15 и 16 и выходные 17 и 18 выводы устройства.15; 8 control, recovery, and feedback, primary 9 and secondary 10 windings of transformer 1; amplifier 11, rectifier 12 amplifier 11; phase-sensitive rectifier 13; 20 load 14, input 15 and 16 and output 17 and 18 of the device.

Устройство работает следующим образом .The device works as follows.

При подаче питающего напр жени When applying the supply voltage

25 на входные выводы 15, 16 устройства, на нагрузке 14 по вл етс напр жение, значение которого определ етс ее сопротивлением в данный момент.25 a voltage appears on the input terminals 15, 16 of the device, on the load 14, the value of which is determined by its resistance at the given moment.

При сопротивлении нагрузки 14, With a load resistance of 14,

Claims

30 is equal to zero, which corresponds to the short-circuit mode or the inclusion of electrovacuum devices on the cold cathode, the voltage on the feedback winding 8 is close to zero. In this case, the amplifier 11 is locked and the current through the control windings b does not flow, which causes the closure of the entire magnetic flux through the central and auxiliary 2 and 3 rods of the magnetic circuit. As the load resistance increases, for example, heating the cathode of vacuum devices, the voltage on the feedback coil 8 increases, which leads to an increase in the bias current in the control winding 6. An increase in the bias current, in turn, leads to a redistribution of the magnetic flux of the central rod 4 through the auxiliary 2, 3 and main side rod 5 of the magnetic circuit, which causes a corresponding increase in voltage on the output pins 17 and 18- to which the load 14 is connected. In this way, the load current 14 smoothly increases from zero to the desired value. Similarly, the load current is controlled depending on the change in the value of the supply voltage, when a total change in the mains flow through the main side core 5 of the magnetic circuit leads to a change in voltage on the feedback winding 8, and therefore a bias current in the coil pack so that the change in the magnetic flux into the rod 5 due to the change in the supply voltage is fully compensated. In order to recover excess energy, and therefore increase the efficiency, the recovery winding 7 is used in the device circuit connected in series with one of the primary winding sections 9. Generally, the proposed device simultaneously improves the reliability and quality of regulation and, consequently, increases the service life of costly electrovacuum devices by eliminating the short circuit mode and ensuring a smooth increase of the load current from zero to the required value. Claims An alternating current control device comprising a four-core transformer with a magnetic core, having control windings, primary windings located on the central and side rods of the magnetic circuit, and a secondary winding located on the main side core of the magnetic circuit, characterized in that reliability and quality of regulation; the transformer is provided with a feedback winding, which is placed on the same terminal with the secondary winding of the transformer. Sources of information taken into account during the examination 1. USSR author's certificate No. 320895, cl. H 02 M 3/24, 1971.

2. For the message 2722386/07,. G 05 F 1/24, 1979.15 0 / v // yifff