SU902009A1 - Pulsed stabilized power supply source - Google Patents

Description

(54) PILOT STABILIZED POWER SUPPLY

one

The invention relates to electrical engineering and may find application in power supply devices for electronic equipment.

A pulsed power source is known that contains a regulating element, a control unit and a protection unit 1.

The disadvantage of this source is the limited load capacity, since the known device does not provide protection against power overloads.

The closest to the present invention is a pulsed stabilized power source containing a transistor regulating element connected in series to the power bus and an output choke of a U-C-B filter and a control unit consisting of a feedback unit and a pulmonary motor. control unit with (one with output terminal G23.

A disadvantage of the known device is the high power dissipation in the regulator power transistor at

significant current loads. To eliminate this drawback, especially in high voltage 1x and high current circuits, the power of the power transistor is significantly increased, which is associated with a lowering and an increase in the cost of the power source.

The purpose of the invention is to increase the load capacity.

The goal is achieved by introducing a thyristor and a waiting pulse generator into the pulse stabilized power source, the thyristor being connected parallel to the transistor control element, and the control electrode of the thyristor connected to the output of the control module pulse and modulator and to the input of the waiting generator and pulses connected to the control input of the Transiotor regulating element.

Claims (2)

The drawing also shows: a pulsed stabilized power source, a principle schema. The tztan source contains a power switch connected in parallel to a tiriotor 1 and a serial transistor regulating element 2, an output filter 3 connected in series with a key, a control unit 4, which includes a feedback node and a pulse-wave modulator, and a standby generator 5 im1t lsov. At the same time, the output of the pulse-width modulator is connected via corresponding uncoupling circuits with the control electrode of the 1 V thyristor to the generator 5. The output of the generator 5 is connected to the control input of the element 2. The device operates as follows. The control unit .4 generates a control pulse depending on the feedback signals. The front edge of the pulse is a thyristor, which forms the main part of the power pulse of the key, the front T1M11 of the control pulse triggers a waiting generator 5, which is 1mpuls with a certain duration. In this case, the thyristor 2 goes over D saturation and short-circuits the thyristor 1 by a certain time interval sufficient to turn off the latter and restore its shuffling properties, IloKOTopoe increasing the passage of the key state. During the turn-on state of transistor 2, the feedback is continuously being applied and not affects the power source settings. After the termination of the pulse from the output of the generator 5, the transistor 2 is locked, and the thyristor. remains locked until the next pulse emerges from the pulse-width modulator output. In this way, the main regulation is realized by the T1fistor, and the transiotor is turned on for a short time (at the time of the thyristor shutdown), which allows a significant increase in the permissible current overloads. The invention increases the load capacity not due to an increase in the number of expensive power transiators connected in parallel, but due to the introduction of a single power element of the thyristor. There is no need to complicate the control circuit of the transistor controller to introduce additional static and dynamic equalizing circuits, which reduces material costs in high-power pulsed stabilized power supply sources. Claims of the invention: An impulse stabilized power supply containing a transistor regulating element and an output L-C-D filter chopper and a control unit consisting of a feedback angle and a pulse-width modulator in series, and a control unit input It is connected to the output terminal, outgoing and outgoing by the fact that, in order to increase the load capacity of the power source, a thyristor and a waiting pulse generator were inserted into it, the thyristor being connected in parallel to a transistor .re- "gulufuyuschemu element, and a control electrode connected to the output thyristor schirotno-width modulator control unit and to the input of monostable pulse generator, whose output is connected to a control input of the transistor of the adjusting member. Sources of information taken into account during the examination 1. USSR author's certificate No. 469965, кп. G 05 F 1/58, 1978 2. USSR author's certificate number 598196, cl. O 05 F 1/58, 1975. R . ... ten j I 0-0