SU1239698A1 - Bipolar power source - Google Patents

Abstract

This invention relates to direct current power sources. The aim of the invention is to provide self-protection against short circuits. The power source consists of. two stabilizers 1.2c common bus 3; When voltage is applied to pins 17 and 18, stabilizer 1 is opened through resistor 16. Voltage appears at pin I2 through resistor 10, transistor 7, resistor 15 and bus 3 2. If pin 12 is shorted to gaine 3 or pin 13, then the starting current of the stabilizer 2 will not flow and the transistor 5 will not open. This will lead to the locking of the transistor 4. When a short circuit of the output 13 on the bus 3 or the terminal 12 transistor 4 will also be blocked by the current of the saturated transistor 6 and the starting current of the stabilizer 2 will not flow, 1 Il. about (L with tSS GO CO Oi with OO

Description

one

The invention relates to electrical engineering and can be used in radio engineering devices as a secondary power source.

The purpose of the invention is to provide self-protection against short circuits.

The drawing shows a circuit diagram of a bipolar power source.

The source contains stabilizers 1 and 2 of constant voltage with a common bus 3. Stabilizer 1 is made on regulating transistor 4, and stabilizer 2 is on p, its control transistor 5. Stabilizer 1 is made on control transistor 6, and stabilizer 2 is on control transistor 7. Stabilizer 1 includes a linear voltage divider on resistors 8 and 9. Stabilizer 2 includes a non-linear voltage divider on resistor 10 and reference zener diode 11. The emitter of transistor 4 and resistors 8 and 10 are connected to the first output terminal 12 out The output terminal 13 is connected to the collector of transistor 5, the zener diode 11 and the resistor 14 of the linear divider of the second stabilizer 2, the other resistor 15 of which is connected to a common pin 3, to which the emitter of the transistor 6 of the stabilizer 1 is connected to the stabilizer 1 between the base of transistor 4 and the first input terminal 17, to which the collector of transistor 4 is connected. In stabilizer 2, the emitter of transistor 5 is connected to the second input terminal of remote control 18,

The double power source operates as follows.

When the input voltage is applied to the input terminals 17 and 18, the stabilizer triggered current through the resistor 16 opens the transistor 4. In this case, a voltage appears on pin 12, and in the circuit pin 12, resistor 10, the emitter junction is the base of transistor 7, resistor 15 , ishna 3, the stabilizer start current 2, which opens the transistors 7 and 5, and the source enters the stabilization operating mode,

If pin 12 is shorted to bus 1-bus pin 13, then the mentioned starting current of stabilizer 2 does not flow and therefore transistor 5 does not open.

396982

This leads to the isolation of the resistor 9

from pin 18 and the current of the transistor 6 flowing through the resistor 8, which leads to the locking of the 5 transistor 4. When the output circuit 13 is short-circuited on pin 3 or output 12, transistor 4 is also blocked by the current of the saturated transistor 6. Therefore, the starting current of the stabilizer 2 from the output 10 yes 17 through the closed transistor 4 to the bus 3 does not flow, as a result of which the residual short circuit current through the transistor 5 also does not flow.

tS Thanks to the means introduced, self-defense of a two-sided power source against short circuits at the output without special means of self-defense or self-starting is provided.

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Claims (1)

Formula A bipolar pH supply source,, contains fy two output raznopol p; 5 terminals and a common plate of two voltage stabilizers, the first of which is made on the regulator; the thin and control transistors of the same conductivity and linear divide 30 le voltage, connected between the output pins, and the output connected to the transci- Topci control base, the regulating transistor being connected to the first by an emitter 35 output terminal, and control the transistor is connected between the base of the regulator: / t of the transistor and the common bus, which is such that, in order to provide self-defense 40 short circuit, the second voltage regulator is applied to the regulating and controlling transistors with a different type of conductivity and linear and nonlinear dividers ;} 5 voltages, the first of which is connected between the second output terminal and the common bus, and the output is connected to the base of the specified control transistor, and the second is connected between the high voltage outputs, the second of which is connected to the reference stub of the non-linear divider, moreover, in the second stabilizer there is a regulating transistor, the collector is connected to the second pin, and the base is connected to the collector of the control transistor, the emitter of which is connected to the input of the nonlinear divider.