SU594494A1 - Continuous-operation dc voltage stabilizer - Google Patents

Description

between the collector of the second protective transistor and the common bus.

The drawing shows an irincipital diagram of a continuous dc voltage regulator.

The device contains a composite control transistor pa transistors 1 and 2, measuring and amplifying node 3 feedback circuit with a load resistor 4, a protective element on the load current sensor 5, a resistor 6, protective transistors 7, 8 and a resistor 9, from which the signal entering the external device when the stabilizer is overloaded.

The continuous DC voltage regulator operates as follows.

In normal operation, when there is no current regulator overload, the voltage applied from the load current sensor 5 to the base of the protective transistor 8 is not enough to open it, and the closed protective transistor 8 opens the current circuit through the resistor 6 and the emitter-base transition of the protective transistor 7, which is also in the closed state. The collector current of the transistor 7 is absent, and the voltage across the resistor 9 is zero.

As the load current increases beyond the predetermined values on the load current sensor 5, a voltage appears at which the transistor 8 begins to open. The collector current of the transistor 8, the flow through the resistor 6 and the emitter-base junction of transistor 7, bypasses the emitter-base junction of transistor 1, and transistors 1 and 2 begin to close. Transistor 7, when current appears in its base circuit, also begins to open and creates the main shunt effect on the emitter-base transition of transistor 1, which contributes to sharper closing of transistors 1 and 2 and reducing the current flowing through them. Branched from resistor 4, the collector current of transistor 7 flows through resistor 9 and creates a positive voltage drop across it, which signals the occurrence of an accident.

Thus, the performance of the main function associated with the issuance of a malfunction signal to the real-time device when the stabilizer is overloaded is automatically combined with an increase in the effectiveness of the response of the protective element of the stabilizer.

The external device, fed with respect to the common area, processes the signals coming from the voltage regulators, providing the output of the address of the faulty power channel and other functions assigned to it, depending on the specific requirements imposed on the power supply system.

The proposed stabilizer ensures that the functions assigned to it and

when the load is supplied with a negative voltage (when the community is connected to the positive output of the stabilizer). In this case, when the stabilizer is overloaded, the positive voltage is also removed from the resistor 9, since the current flowing through the resistor is created by the stabilizer's power supply. The level of the output signals taken from the resistor 9 is determined by the magnitude of the resistance of the resistor 4 and the voltage

acting between the input of the control transistor and the common bus. If necessary, to have the same size output signals, instead of resistor 4, a current-stabilized two-port network is used. In this case, the current through the resistor 9 will be determined by the current set by the current-stabilizing two-pole network, which is chosen to be the same for all stabilizers. The output of unipolar signals from stabilizers with different polarities of the output voltage makes it possible to unify the external devices that receive these signals.

The proposed stabilizer works in the same way when the protective transistor is connected to the negative output terminal or to the output of an auxiliary rectifier connected by another pole to the emitter of the regulating transistor.

Claims (2)

1. Author's certificate number 365696, cl. G 05 F 1/58, 1973. 2. The author's certificate number 428372, cl. 5 G 05 F 1/58, 1974.