SU744512A1 - Switch-type dc voltage stabilizer - Google Patents

Description

one

The invention relates to electrical engineering and can be used in secondary power sources.

The known stabilizer contains regulating and control transistors, a time setting C-chain, an LC filter, a reference voltage source, a feedback amplifier, and a protective zener diode

1J.

In the indicated stabilizer, an increase in the delay in closing the control transistor relative to the moment of response of the feedback amplifier due to inertia, the time of the specifying C-chain with an increase in the supply voltage will lead to a significant increase in the output voltage of the stabilizer.

The closest technical solution to the invention is a stabilizer containing regulating and controlling transistors, emitters connected to the input terminal, the collector of the regulating transistor is connected via an LDC filter to the output terminal, and after a time the reference / C-chain is connected to the base of the control transistor the collector of which is connected to the base of the regulating transistor, and through the first resistor - with a common length, the comparison transistor, the emitter of which is connected to the output of the reference source

voltage input connected to the output pins, the collector is connected to the base of the control transistor, two divider resistors, the first of which is included

5 between the common bus and one output of the feedback resistor, the other output of which is connected to the input output.

At the moment the power is turned on in the specified stabilizer, the supply voltage goes to the output voltage stabilizing resistor. the midpoint of the voltage divider connected to the base of the voltage comparison transistor. In this case, on the basis of the voltage comparison transistor, a voltage jump appears that is proportional to the value of the supply voltage. If the voltage jump exceeds the opening threshold value, the voltage comparison transistor opens and causes the control transistor to open, which bypasses the base-to-emitter transition of the control transistor, prohibiting it from opening. Consequently, when the supply voltage exceeds a certain threshold value, the stabilizer

It will not work.

The aim of the invention is to expand

Claims (2)

range of allowable voltage The goal is achieved by the fact that in a stabilizer containing regulating and regulating transistors, emitters connected to the input terminal, the collector of the regulating transistor through the LD C-filter is connected to the output terminal, and after a time specifying the C-center to the base of the control transistor, the collector which is connected to the base of the regulating transistor, and through the nerve resistor with a common length, the comparison transistor, the emitter of which is connected to the output of the on-voltage source, the input connected to the output pins, a collector connected to the base of the control transistor, two splitter resistors, the first of which is connected between the base of the comparison transistor and the output terminal, the second between the total length and one output of the feedback resistor, the other output of which is connected to the input terminal, a diode is additionally inserted, the anode of which is connected to the base of the reference transistor, and the cathode to the connection point of the second resistor of the divider and the feedback resistor. The drawing shows the principal stabilizer circuit. The stabilizer contains regulating 1 and controlling 2 transistors, the emitters of which are connected to the input terminal. The base of the transistor 1 is connected to the collector of the transistor 2 and through the nerve resistor 3 to the common length. The base of the transistor 2 is connected to the collector of the voltage comparison transistor 4 and through a series-connected capacitor 5 and resistor 6 the timing of the driver / C-chain to the collector of the transistor 1. The collector of transistor 1 is connected to the cathode of the diode 7 and the Drossel 8 / .OC filter. Iodiode diode 7 connect with a common bus. A filter capacitor 9 is installed between the output terminal and the total length. The emitter of the transistor is connected to the cathode of the reference Zener diode 10 and the resistor 11 of the source of the reference voltage. Anode Zener diode 10 connect with a total length. The base of the transistor 4 is connected to the anode of the additional diode 12 and through the first resistor 13 of the voltage divider to the output terminal. The cathode of diode 12 is connected through a feedback resistor 14 to an input terminal and through a second resistor 15 of a voltage divider to a common bus. The voltage regulator operates as follows. When the supply voltage reaches the stabilizer input, the voltage from the output of resistors 14-15 goes to the cathode of diode 12 and is not passed to the base of resistor 14. The base of transistor 4 is curved to ground through series-connected resistor 13 and an uncharged capacitor 9 of the filter. The transistor 4 remains in the closed state. This opens the transistor 1. A linearly increasing current flows through the filter choke 8, which flows into the load and charges the capacitor. The output voltage of the stabilizer increases. When the output voltage reaches a given magnitude, the tracer 4 opens, causing the opening of transistor 2 and closing of transistor 1. The jump on the collector of transistor 1 abruptly changes to zero. The capacitor 5 starts charging through the resistor 6 and the base-to-emitter transition of the transistor 2. The transistor 2 is maintained in the open state and the transistor 1 in the closed state. In this case, the energy stored in the choke 8 and the capacitor 9 is consumed in the load. Output Disappearance is suppressed. 11After charging the co-sensor 5, the transistor 1 opens. The process then repeats. Consequently, the circuit of switching on the power supply is not passed to the base of the transistor of the voltage comparison and does not prevent the start of the stabilizer when the supply voltage rises, which ensures the widening of the range of permissible supply voltages. Claims of Invention The key voltage regulator, containing regulating and controlling transistors, emitters connected to the input terminal, the collector of the regulating transistor through the LLC-filter is connected to the output terminal, and after a time setting the ./iJC-point with the base of the controlling transistor, the collector of which is connected to the base of the regulating transistor, and through the first resistor with a common length, the comparison transistor, the emitter of which is connected to the output of the voltage source, the input connected to the output By the outputs, a collector connected to the base of the control transistor, two splitter resistors, the first of which is connected between the base of the comparison transistor and the output terminal, the second between the total thickness and one output of the reverse connection resistor, the other output of which is connected to the input terminal. that, in order to expand the range of permissible supply voltages, a diode is inserted into it, the anode of which is connected to the base of the comparison transistor, and the cathode is connected to the junction point of the second divider and feedback resistor. Sources of information taken into account in the examination 1. USSR author's certificate number 334563, cl. G 05F 1/58, 19. 2. E. S. Graver. Key stabilizers of direct current. “Holy Day, 1970, p. 136, fig. 6.22 (prototype).