SU1465993A1 - Switching device - Google Patents

Description

(21) 4208406 / 24-21

(22) 03/11/87

(46) 15.03.89. Bul PIG

(72} Yu, N.Tsybin and S.V.Fedorova

(53) 621.382 (088.8)

(56) German Patent No. 2915322 Cl. H 01 FI 9/30, 1980.

Patent of Germany No. 2613929, cl. H 01 H 9/30, 1979, FIG.

(54) COMMUNICATING DEVICE

() The invention relates to a pulse technique and can be used in devices requiring the use of hybrid switching devices. The purpose of the invention is to increase reliability. The switching device contains the first and second transistors 1, 13, the first and second resistors -, U, capacitor 3, diode-transistor optocoupler 4, diode 5, switch 6, winding 7 of relay with closing contact 8, input and output buses 9 , 10, current driver 11, common bus 14. As a result of introduction of the current driver, the second resistor. The second transistor, connecting the relay to the power bus through the collector-emitter junction of the first and second transistors and forming the second transistor unlocking after unlocking the first transistor creates a stable relay and closure of its contact, which increases the reliability of the switching device. 1 il.

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The invention relates to the use of this technique. It can be used in a hybrid apparatus of a gutation apparatus.

The purpose of the invention is to increase reliability.

The drawing shows a circuit diagram of a switching device. .

The switching device contains the first transistor 1 ,. first resistor 2, capacitor 3, diode transistor optocoupler 4 "diode 5 key 6, winding 7 relays with closing contact 8 ,, input 9, output, bus line tOj driver t1 TOKaj second resistor t2, second transistor 13 The same conductivity as. The first, common tire T4, with. In this case, the closing contact 8 of the relay is connected in parallel to the collector-emitter junction of the first transistor T, the collector of which is connected to the shield pin 9 and the first transistor

1, a current 1T body whose second terminal is connected to the first output of the first resistor 2, the first capacitor 3j, the base of the first transistor 1 and through the second resistor 12 to the base of the second transistor 13, the collector of which is connected through the winding 7 of the relay to the emitter of the first transistor 1 and An emitter bus 10, an emitter with a common bus 14 and an emitter of an optocoupler transistor 4, the collector of which is connected to the base of the second transistor 13, the cathode of an optocoupler 4 is connected to a common bus 14 and the anode of the diode 5, the cathode of which is connected to the anode of the optocouple P ry 4 and the second terminal of the second capacitor 3s vgaod nepisor resistor 2 is connected through the switch 6

common bus 14,

The switching device operates as follows.

In the initial state, the first and second transistors 1, 13 are locked, since from the second output of the current driver 11 connected via the first resistor 2 by a closed key 6 to the common bus 14, a blocking voltage is applied to the bases of the transistors. The charge circuit of the capacitor 3 B1 is mounted by the low impedance resistor 2, and there is practically no current in the capacitor circuit. Winding 7 relays de-energized, and its closing contact

0 "

five

five

0

five

8 is open. The voltage on the output bus 10 is missing.

When key 6 is opened, the capacitor 3 is charged, the charge current flows from the current driver 11 through; the capacitor and the diode of the optocoupler 4 to the common bus 14. As the capacitor 3 charges, the base potential of the first transistor T linearly increases, which leads to its unlocking and the appearance of a linearly increasing voltage on the output bus 10 and one of the terminals of the relay winding. The flow of current through the diode of the optocoupler 4 leads to the unlocking of the transistor of the optocoupler 4, which holds the second transistor 13 in a non-conducting state, and the winding 7 of the relay remains de-energized. At the end of the charge of the capacitor 3, an optocoupler transistor. 4 is locked and the current shaper It through the second resistor 12 unlocks the second transistor TZ. As a result, a current flows through the winding 7 of the relay, the relay operates and shunts with its 1m terminal 8 the collector-emitter junction of the first transistor, t ..

When key 6 returns to the closed state, the capacitor 3 is expanded through diode 5. And the first resistor 2j transistors are locked, the relay is de-energized, and the circuit returns to its original state.

Thus, the introduction of the current driver, the second resistor and the second transistor, as well as new connections for connecting the relay coil and transistor control, ensures a stable relay operation and increases the reliability of the switching device.

Formula of Invention

A switching device containing a first transistor, a first resistor, a capacitor, the first output of which is connected to the first output of the first resistor, a diode-transistor optocoupler pair, a diode, the anode of which is connected to the cathode of the optocoupler diode, a switch, a relay, whose closing contact is connected in parallel the junction of the collector-emitter of the first transistor, the collector of which is connected to the input bus, the emitter - to the output, characterized in that, in order to increase 1D65993A

no reliability, introduced form-connected to the base of the first transistor current, the second resistor and the second and through the second resistor with the base

a transistor of the same conductivity type, a second transistor and a collector

whose collector is connected through an optocoupler transistor, the first

relay coil with output bus, emit- and second current driver terminals

TER - with a common bus, with the emitter connected respectively to the collector of the optocoupler pair and the cathode of the first transistor. And the first

its diode, the anode of which is connected with the output of the first resistor, the second

the cathode of the diode and with the second output whose output is connected via a key

a capacitor, the first pin is a common bus.

Claims (1)

Claim A switching device comprising a first transistor, a first resistor, a capacitor, the first output of which is connected to the first output of the first resistor, a diode-transistor optocoupler pair, a diode whose anode is connected to the cathode of the optocoupler diode, a key, a relay, a make contact which is connected in parallel with the collector junction the emitter of the first transistor, the collector of which is connected to the input bus, the emitter is the output one, characterized in that, in order to increase reliability, a current driver, a second resistor, and a second transistor are introduced of the same type of conductivity, the collector of which is connected through the relay winding to the output bus, the emitter to the common bus, to the emitter of the optocoupler transistor and the cathode of its diode, the anode of which is connected to the cathode of the diode and to the second output of the capacitor, the first output of which 1465993 4 is connected to the base of the first transistor and through the second resistor to the base of the second transistor and the collector _{5 of the} optocoupler transistor, the first and second terminals of the current driver are connected respectively to the collector of the first transistor and the first output of the first resistor, the second 10 output of which is connected via a key to a common bus .