SU543929A1 - DC Compensation Stabilizer - Google Patents

Description

one

The invention relates to power sources, in particular, semiconductor protection devices.

DC compensating stabilizers J1, 2j are known.

The known DC compensatory stabilizer, which contains a current sensor, a multivibrating standby, a delay circuit, and a load ij, has a number of drawbacks: the standby multivibrator continuously consumes power from the power supply even during normal operation of the compensatory voltage stabilizer, which reduces efficiency devices in general;

the separation of functions between the current sensor, standby, multivibrator and delay circuit leads to complication of the protection device, an increase in the number of its elements, which reduces the reliability of the entire device.

The closest technical solution to this invention is a DC compensating voltage regulator containing connected in series to the positive bus of the supply source

The coupling transistor, the base of which is connected to the output of the DC amplifier, feedback circuit and to the collector of the regulating transistor, through the current stabilizing node, the control input connected to the overcurrent and short circuit protection unit in the output circuit consisting of a resistor current sensor included in the circuit for the load current, an amplifier, a threshold element and a delay circuit 2.

A disadvantage of the known device is circuit complexity and low efficiency.

The aim of the invention is to increase the xpd. and simplification of the stabilizer circuit.

Claims (2)

The goal is achieved by the fact that the amplifier, the threshold node and the delay circuit of the protection unit are made in the form of a live multivibrator on two transistors with different conductivity, firstly the base of the pnp transistor is connected via serially connected first resistor and resistor current sensor to positive The supply source bus, as well as to one of the capacitor terminals, the emitter of this transistor is connected via the second resistor also to the plus bus of the supply source, and the collector through the third negative busbar resistor itayuschego source and a transistor base kotorog collector connected to the other terminal of the capacitor and via a fourth resistor - to the regulating transistor collector and an emitter does not indirectly connected to the negative rail of the supply source. The drawing shows a circuit diagram of a compensating constant voltage regulator made in accordance with this invention. The stabilizer contains a regulating transistor 1, the base of which is connected to the output of the DC amplifier 2 and to the collector of the regulating transistor 1 through the current stabilizing node 3, the control input 4 assembled at the transistor 5 and the zener diode 6 connected to the protection block 7j consisting of resistor sensor current 8 and standby multivibrator assembled on two transistors 9 and 1O, resistors 11, 12, 13, 14 and capacitor 15, load 16. The device works as follows In the absence of overcurrent mode or short circuit b approx protection 7, which is a standby multivib Rhatore configured transistors 9, 10 different types of reducibility is in the closed (stable) state, i.e. transistors 9 and 10 are closed. The capacitor 15 is charged to the magnitude of the voltage drop across the resistor 14, as a result of which the zener diode b is turned on and the transistor 5 is in saturation, which ensures the normal operation of the current stabilizer. Thus, the compensating voltage regulator is in a working condition. in the case of an overcurrent or short circuit mode, the voltage drop across the rheistor current sensor 8 is sufficient to open the transistor 9, which in turn leads to the opening of the transistor 10. Due to the positive feedback between the transistors 9 and 10 in the unit protection 7, an avalanche-like process occurs, which leads to saturation of transistors 9, 10 and its transition to a quasi-stable state. As a result of the saturation of the transistor Yu, the zener diode 6 is turned off and the transistor 5 is closed, which leads to the closure of the current-stabilizing unit 3 and the regulating transistor 1. The load 16 is disconnected from the cedon circuit. The capacitor 15 is charged to the magnitude of the input voltage. The dosage of capacitor 15 and the absence of current flowing through the resistor 8, due to the fact that the regulating transistor 1 is in the closed state, causes the transistors 9 and 10 to close and the block is protected 7 in a stable (closed) state. The capacitor 15 begins to discharge its discharge time is determined by resistors 11, 14), which leads to the inclusion of Zener diode 6 and the opening of the regulating transistor 1. When an overcurrent or short circuit occurs, the protection circuit will turn on again - the stabilizer will go into a pulse test No load, and only in the absence of overcurrent or short circuit, it will restore its normal operating mode. Claim Compensation DC Voltage Stabilizer Containing a control transistor connected in series to the positive bus of the supply source, the base of which is connected to the output of the DC amplifier of the feedback circuit and to the collector of the regulating transistor through a current stabilizing node controlling the input connected to the unit protection against current overloads and short circuits in the output circuit, consisting of a resistor current sensor connected to the circuit for the flow of load current bodies, a threshold element and a delay circuit characterized in that, in order to increase the efficiency and simplify the stabilizer circuit, the amplifier, the threshold node and the delay circuit of the protection unit are made in the form of a waiting multivibrator on two transistors with different conductivity, the p-pf transistor base is connected via the first resistor connected in series and the resistor current sensor to the positive bus of the supply source, as well as to one of the capacitor terminals, the emitter of this transistor is connected to the second resistor also with the positive one the supply source, and the collector through the third resistor - with the minus bus of the supply source and with the base of the pnp transistor, the collector of which is connected to another output of the capacitor and through the fourth resistor - to the collector of the regulating transistor, and the emlter is directly connected to the minus bus of the supply source. Sources of information taken into account in the examination 1. Abstract review of the materials of domestic and foreign press for 196468 Protection and functional control of 5 power sources and some other electronic devices, issue 8, 1968, p. 13, fig. 9. 2. Application No. 2109299/07 dated February 28, 75, for which a decision was made to issue an author's certificate (prototype). 1 / g