SU691824A1

SU691824A1 - Protected rectifier-type d-c voltage stabilizer

Info

Publication number: SU691824A1
Application number: SU772508327A
Authority: SU
Inventors: Юрий Евгеньевич Синегубко; Анатолий Петрович Вуколов; Валентин Евлампиевич Малахов
Original assignee: Предприятие П/Я Г-4421
Priority date: 1977-07-21
Filing date: 1977-07-21
Publication date: 1979-10-15

Description

Изобретение относитс к электротехнике и может быть использовано в устройства} электропитани различной радиотехнической аппаратуры.The invention relates to electrical engineering and can be used in power supply devices for various radio engineering equipment.

Известны ключевые стабилизаторы посго нного напр жени с защитой. .Key stabilizers of constant voltage with protection are known. .

Первое из известных устройств содержит последовательный ключевой элемент (f фильтром на выходе, узел управлени и узеЛ защиты, состо щий из предохранител пос- .ле которого параллельно входу включаетс цепочка из последовательно соединенных тиристора и ограничивающего резистеуа (1).The first of the known devices contains a serial key element (f with an output filter, a control node and a protection node consisting of a fuse after which a chain of series-connected thyristors and a limiting resistor (1) is connected in parallel to the input.

Второе из известных устройств, вл ющеес наиболее близким техническим рещением к данному изобретению, содержит клю чевой транзистор, эмиттер-коЛлекторным переходом вклк)ченный между первой входной и выходной клеммами, а базой соединенный с выводом дл подключени импульсного блока управлени , LC-фильтр, выхбдом соединенный с выходными клеммами, демпфирующий, диод, анод которого соедицен с первой выходной клеммой, и учел защиты , состо щий из предохранител , однимThe second known device, which is the closest technical solution to this invention, contains a key transistor, an emitter-collector transition included between the first input and output terminals, and a base connected to an output for connecting a pulse control unit, an LC filter, an output connected to the output terminals, damping, a diode, the anode of which is connected to the first output terminal, and took into account the protection consisting of a fuse, one

выводом соединённый со второй входной Клеммой, а другим выводом - с первым выводом ограничивающего резистора и анодом первого тиристора, катодом подклк ченного ко входу LC-фильтра, и второго тиристора, катод кот(ф6го соединен с первой входной клеммой-(2).the output is connected to the second input terminal, and the other output to the first output of the limiting resistor and the anode of the first thyristor, the cathode of the LC filter connected to the input, and the second thyristor, the cathode (f6go connected to the first input terminal- (2).

Недостатком известных устройств в| ютс большие габариты и большой расход мощности стабилизатора.A disadvantage of the known devices in | large size and high power consumption of the stabilizer.

Цель и зобретени - уменьшение габаритов и расхода мощности стабилизатораПоставленна цель достигаетс тем, что в ключевом стабилизаторе посто нного напр жени с защитой в узел защиты введенThe goal and the invention is to reduce the size and power consumption of the stabilizer. The aim is achieved by the fact that in the key constant-voltage stabilizer with protection, the protection unit is inserted

дополнительный диод, включенный в пр мом направлении между вторым выводом ограничивающего резистора rt входом LCфильтра , причем анод второго тиристора подключен ко второму выводу ограничивающего резистора, а к его первому выводу -an additional diode connected in the forward direction between the second output of the limiting resistor rt and the input of the LC filter, the anode of the second thyristor connected to the second output of the limiting resistor, and to its first output -

.катод демпфирующего диода.cathode damping diode.

На чертеже приведена принципиальна «Уема устройства.The drawing shows the principal “device MEMORY.

Claims

The stabilizer contains a fuse 4, a thyristor 2, a limiting resistor J, an additional diode 4, a thyristor 5, a key transistor 6, an LC filter 7 and a damping diode 8. In normal operation, the load current flows through the fuse 1, the thyristor 2, the 1C filter choke 7 and the key transistor 6. The current through the limiting resistor 3, the additional diode 4 and the thyristor 5 does not flow. The diode 8 maintains the current through the crystal 2 continuous. In case of overload (overcurrent or overvoltage), the device operates as follows. The thyristor 5 is given a control signal. The circuit opens and along the circuit - fuse i, the limiting resistor 3, the thyristor 5 begins to flow a significant current, the magnitude of which is sufficient; to melt the smooth inset fuse I and is determined by the resistance of the resistor 3 and the internal resistance of the source from which the device is powered. As a result, fuse 1 and blows off. switches the protection node and the key transistor from an external power source. At the time of starting (switching on) the circuit across the circuit - fuse 1, limiting resistor 3, additional diode 4, choke LG filter 7, key transistor 6. The current is limited by the resistor 3. As the voltage of the capacitor LC filter 7 reaches a certain (pre-installed) 8 are visible, the thyristor 2 opens and the stabilizer goes into normal operation; ; . ; .. ... Thus, when the protection against overloads is used and when the protection against inrush currents is used, the same resistor 3 is used as a limiting one. If it is necessary to increase the current for overheating overcurrent of the fuse, the limiting resistor 3 can disconnect consecutively connected resistors and 5 In this case, the resistor is connected to the safety point of this resistor, while the output power of the resistive resistors remains the same. The application of the invention allows to reduce the mass and dimensions of the article; bilizer due to the same resistance of the same resistor for limiting inrush currents and for limiting the current through: the thyristor when forcing the fuse to blow. The newly introduced additional diode has considerably less masses and dimensions than the second limiting resistor excluded from the device. Connecting a damping diode 8 to the point of connection of a fuse with a limiting resistor eliminates intermittent currents through the thyristor, bypassing the limiting resistor, which facilitates the operation of this thyristor and also improves the efficiency of the circuit, A control signal can be removed from it. Claims A key stabilizer for a voltage of a protective voltage containing a key transistor emitter-collector junction connected between the first input and the output one terminal, and a base connected to an output for connecting a pulse control unit; an LC filter, an output connected to output terminals, a damping diode, the anode of which is connected to the first output terminal, a protection node consisting of a fuse, one output connected to the second input terminal and the other output is with the first terminal of the First Resistor I and the anode of the first thyristor, the cathode connected to the 1C-fIe input, and the second thyristor, the cathode of which is connected to the first input terminal, which is In order to reduce the size and power consumption of the stabilizer, an additional diode is inserted in the protection node, connected in the forward direction between the output of the limiting resistor and the input of the LC filter, the anode of the second thyristor is connected diode. Sources of information taken into account in the examination. 1. Agapov M.V. and Pikuta A.V. Electrici. Protection of semiconductor sources: “power supply, M.,“ Energie, 1966, p. 138.

2. US Patent No. 3781637, cl. And 02 M 1/18, 1973.

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