SU551624A1

SU551624A1 - DC Compensation Voltage Regulator

Info

Publication number: SU551624A1
Application number: SU2048891A
Authority: SU
Inventors: Владимир Алексеевич Бычков
Original assignee: Предприятие П/Я В-2655
Priority date: 1974-07-18
Filing date: 1974-07-18
Publication date: 1977-03-25

Description

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Изобретение относитс к электротехнике , в частности, к стабилизированным источникам электропитани .The invention relates to electrical engineering, in particular, to stabilized power sources.

Известен стабилизатор напр жени посто нного тока, содержавхий несколько регулирующих транзисторов, в коллекторные цепи; некоторых из них включены балластные резисторы, и управл ющий орган, задающий очередность отпирани транзисторов jl . В таком стабилизаторе достигнуто оп реДеленИое сокращение габаритов теплоот- воДа, на котором установлены регулирук шие транзист.оры, за счет переноса избытка рассеиваемой мощности на балластные резисторы, а также благодар очередности прохождени максимума рассеиваемой транзисторами мощности.A DC voltage regulator, containing several control transistors, in a collector circuit is known; Some of them included ballast resistors, and a governing body that sets the order of unlocking transistors jl. Such a stabilizer has achieved a definite reduction in the dimensions of the heat transfer, on which the control transistors are installed, due to the transfer of excess dissipated power to the ballast resistors, as well as due to the order of power passing through the maximum power dissipated by the transistors.

Известен также компенсационный стабилизатор напр жени посто нного тока, содержащий последовательный регулирующий орган, состо щий из регулирующих тразисторов одинакового типа проводимости, одногоосновного и, по крайней мере, двух вспомогательных, и резисторного балластного элемента в силовой цепи регулирующего органаJуправл ющий орган в базовойг,цепи регулиро юшего органа и усилитель цепи обратной св зи на транзисторе 23,A compensating DC voltage regulator is also known, which contains a series regulator consisting of regulating resistances of the same type of conductivity, one main and at least two auxiliary, and a resistor ballast element in the power circuit of the regulating authority; Your body and the feedback amplifier of the transistor 23,

Недостатком известных стабилизаторов вл етс неэквнпотенциальность коллекторов регулирующих транзисторов, что требует гальванической изол ции корпусов регулирующих транзисторов от общего теплоотвода с помощью какой-либо изол ционной пленки, что приводит к увеличению теплового сопротивлени переход-корпус, из-за чего габариты теплоотвода должны быть увличены . Выбор тонкой изол ционной пленки ограничен ее механической прочностью, а само применение пленки усложн ет технологию .A disadvantage of the known stabilizers is the inefficiency of the collectors of control transistors, which requires galvanic isolation of the control transistor cases from the common heat sink using any insulating film, which leads to an increase in junction-to-heat resistance, due to which the heat sink dimensions must be increased. The choice of a thin insulating film is limited by its mechanical strength, and the use of the film itself complicates the technology.

Цель изобретени - повышение надежности и улучшение весо-габаритных характеристик компенсационного стабилизатора напр жени посто нного тока.The purpose of the invention is to increase the reliability and improve the weight-dimensional characteristics of a compensating DC voltage regulator.

Claims

This is achieved by the fact that in a compensating DC voltage regulator containing a serial regulator consisting of regulating transistors of the same type nccvotsimestn, one main and at least auxiliary, and a resistor of the ballast element in the power circuit of the regulator, the control unit in the basic circuit of the regulator n the feedback amplifier at the transistor, the control unit is made on three trajectories of the same conductivity type with pei-emitter and ,; connected to the output terminal of the feedback circuit amplifier, collectors to the bases of the corresponding control transistors and through the load resistors to the additional stabilizer supply terminal, the ballast element is made on two pairs of series-connected resistors, one pair connected between the emitter of the main control transistor and a point connecting one of the output terminals of the stabilizer with the base of one of the transistors of the control unit, the second pair - between the emitter of the first auxiliary of the control transistor and the connection point of the midpoint of the first pair of resistors with the base of the second transistor of the control body, and the base of the second auxiliary control transistor is connected to the middle point of the second lara of the transistors, and the collectors of the control transistors are connected to one of the main supply terminals in the stabilizer, and the emitter the last auxiliary regulating transistor is connected to the base of the first transistor of the controlling organ. The principal circuit of the compensation stabilizer The voltage clamp of the current circuit is shown in the drawing. The stabilizer contains the main 1 and two auxiliary 2, 3 control transistors, which are composed of compound transistors with a large amount of stabilizer. In the emitter circuit of the main 1 and the first auxiliary 2 transistors included a pair of series-connected resistors 4, 5 and b, 7 of the ballast element. The bases of the control transistors are connected to the control unit on transistors 8–10, whose collector circuits include load resistors 11–13. The emitter circuit of the transistor 8-10 of the control element is connected to the collector of the transistor 14 of the feedback circuit amplifier. The sequence of exit from the saturation mode of the transistors 8-10 of the control device is given by resistors 5, 7. The DC voltage compensation regulator operates as follows. Mri is the absence of a load current through the pi, at random, the transistors 1, 2 and 3 a small collector current flows, equal to the consumption by the measuring device of the stabilizer and the feedback circuit amplifier. The mode close to the locked state TpaHaijcto 1, 2 and 3 is provided by the transistor 8-10 of the control device of the device bypassing most of the current entering the bases of transistors 1-3 through resistors 11-13. As the load current of the stabilizer increases, the potentials of the emitters of the transistors 8.9, 1O increase due to the feedback circuit amplifier. As a result of a decrease in the opening voltage at the input of the transistor 8, the current in the collector circuit of the control transistor 1 increases. The power of the control transistor 1 is unloaded by switching it to saturation mode as the load current increases. The current flowing in the load circuit creates a voltage drop across the resistors 5, 7, which maintains the transistors 9, 10 of the control element in a saturated state. When, as a result of the saturation of the transistor 1, an increase in the current through its circuit becomes impossible, the amplifier of the feedback circuit further increases the potential of the emitters of the transistors 8, 9, 10, as a result of which the transistor 9 comes out of the saturation state and the current in the load circuit flows through reg switching transistor

2. The current, creating a voltage drop across the resistor 5, will continue to maintain the transistor 10 in a saturated state. When the supply voltage is high, the control transistor 3, which does not have a ballast resistor in the emitter circuit, does not participate in the stabilizer. The current in its circuit arises when the supply voltage is low, when all previous control transistors 1 and 2 enter saturation mode, and the circulating current flowing through them will not reach the value of the current consumed by the load. The control principle of these control transistors is similar to the previous one. The invention is promising for use in stabilizers of integral design, ensuring the removal of excess power dissipated by the regulator to the ballast resistors removed from the integral assembly. Compensation Claim, a stabilizer of direct current voltage, containing subsequently