SU1684893A1 - Device for starting transducer - Google Patents

Description

one

(21) 4115322/07

(22) 06.24.86

(46) 10/15/91. Bul №38

(71) Research Institute of Automation and Electromechanics at the Tomsk Institute of Automated Control Systems and Radioelectronics

(72) V.P. Layer, V.N. Mishin and S.A.Selin (53) 621.314.58 (088.8)

(56) USSR Author's Certificate Ik 634437, cl. H 02 M 7/537, 1976,

For the application of the Federal Republic of Germany No. 1948919, cl. H 02 M 7/537, 1975.

USSR author's certificate N 615466, cl. H 02 M 7/537, 1977. (54) DEVICE START-UP OF THE CONVERTER

(57) The invention relates to electrical engineering and is intended for starting autonomous

constant voltage converters, The goal is to reduce the weight and size. The device implements the start-up of a converter using a capacitive energy storage device with the subsequent discharge through a transistor switch to the primary winding of a pulse transformer, the secondary winding of which is connected to a load via a full-wave rectifier. Energy is transferred to the load at the stage of charge-discharge and subsequent metering of the storage capacitor, which increases the efficiency of using the storage capacitor and expands the range of induction variation of the core of the switching transistor. 1 il.

Yo

The invention relates to electrical engineering and can be used in the sources of secondary power supply systems of radio engineering, automation and computer technology.

The purpose of the invention is to reduce the weight and size of the converter start-up device.

The drawing is an electrical schematic of the starting device.

The device contains a three-winding transformer 1. connected to the first input terminal through a resistor 2. a rectifier 3. a capacitor 4, a transistor 5, a series circuit of a zener diode 6

and resistor 7, multivibrator 8, thyristor 9, as well as the first 10, second 11 and third 12 diode-resistive circuits.

The device works as follows.

When the supply voltage arrives, the storage capacitor 4 starts to charge through resistor 2 and the first winding of transformer 1. Energy is transferred to the load through rectifier 3 connected to the second winding of transformer 1, and simultaneously the capacitor 4 is charged. the capacitor 4 is preparing for the operation of the multivibrator 8. After some 00

4 00 O CO

After the power supply voltage is applied, the multivibrator 8 is triggered and with ei a pulse is sent to the control input of transistor 5, which triggers transistor 5. When the transistor is unlocked, the voltage applied to the first capacitor 4 is applied to the first winding of the transformer 1 and simultaneously The third winding of the transformer 1 goes through the first 10 and second 11 dT5-resistive circuits to the control inputs of the thyristor and transistor 5. Under the action of the unlocking voltage, the thyristor 9 shunts the power input of the multivibrator O, Redirecting the continuation of the oscillatory processes of the multivibrator 8. Uniformly unlocking the voltage from the third winding of the transformer 1 keeps the transistor 5 in the open state until the capacitor 4 is discharged or the transformer 1 is saturated. When the voltage of the third winding of the transformer 1 depletes transistor 5 and a new charge cycle begins for capacitor 4 through the first winding of transformer 1 and resistor 2.

Thus, the energy in the load is also delivered to three cycles, the charge - discharge - the charge of the capacitor 4. When the converter is in operation, the starting device draws current at the level of the holding current of the thyristor 6, which ensures minimum energy consumption.

Thus, the proposed device improves the efficiency of using the storage capacitor, the core of a pulse transformer, and improves the weight and size parameters due to the fact that the transfer of energy to the load

performed at three time intervals; z dd - discharge - doses of the rald storage capacitor; the core of the pulse transformer operates with a large differential induction; efficiency is attempted using circuit elements.

Claims (1)

The invention The prebrazopatel start device containing a three-bore transformer, the first terminal of which is first connected through a resistor. To the first input terminal, the second winding is connected via a rectifier with output terminals, a capacitor, the first terminal of which is connected to the second input terminal and to the transistor emitter a zener diode and a resistor, so that, in order to reduce masses and tabarites, a multivibrator, first, second and third diode-resistive circuits and a shunt power supply input of the vibrator, a thyristor connected in series with a circuit of a stabilizer and a resistor between the first and second input terminals, and a third winding of the rank of the formator first output connected to the second input zone, and the second output connected through the first and second diode-resistive circuits with control inputs, respectively, of the thyristor and transistor, the collector of which is connected to the first terminal of the first transformer, the second terminal of which is connected to the second terminal of the capacitor, and the output of the multivibrator is connected to the control input of the transistor via a third diode-resistive circuit.