SU1244782A1 - Device for controlling voltage of rectifier synchronous generator - Google Patents

Abstract

The invention relates to electrical engineering, in particular to automobile and agricultural generating sets. for real machines. The goal of the invention is to increase reliability. The device contains a synchronous valve generator (SG) 1 with excitation winding 5, transistor switch 2, damping diode, 6, intermediate transistor (T 7, input T 10, resistive divider (RD) 12, T protection 13, capacitor 15 and diode I6 protection, measuring zener diode (C) 17. Enhancement; T 13 of the same conductivity as the intermediate T 7, and connecting the medium output of the RD 12 to the base T 10, connecting the protection diode 16 to the opposite control transition T 7 eliminates false positives of the device. SG 1 self-excitation mode at current - excitation close to zero , the output voltage has a sawtooth shape. When this voltage rises, the capacitor 15 is charged, but T 7 does not open until the voltage is low enough for breakdown C. 17. Opening the T 13 does not cause false operating voltage of the SG 1 close the transistor switch 2, which prevents the growth of the excitation current, which will improve the self-excitation of the SG 1 and increase the reliability. 2 ill. With (O (/) s. Fy

Description

The invention relates to electrical engineering, and is referred to as generator sets for automobiles and agricultural machines.

The purpose of the invention is to increase the reliability of the device for regulating the voltage of the synchronous valve generator by eliminating its false operating conditions.

Figs. I and 2 show electrical circuits of a power source — a direct current comprising a device for controlling the voltage of a gate synchronous generator, implemented on transistors with different types of conductivity.

The DC power source contains a synchronous valve generator 1 and a device for regulating the voltage of the valve synchronous generator, which includes an output transistor switch 2 connected between the right 3 and second 4 power synchronous generator synchronous generators through a winding generator 5, shunted a diode in, intermediate transistor 7 connected by the emitter directly, and the base through the first resistor 8 to the first power output 3 of the gate syn generator, the collector through the limiting resistor 9 to the second power output 4 of the ventilator synchronous generator, emitter-collector junction parallel to the control junction of the output transistor switch 2, the inverse transistor 10 of the intermediate transistor 7 connected by the collector through the second resistor 11 to the base of the intermediate transistor, the base is connected with the middle output of the resistive divider 12, the extreme outputs of which are connected to the first and second. Odam synchronous generator generator, emitter - with the second power output of the synchronous valve generator, protection transistor 13 connected by a base through protection resistor 14 to first types of protection capacitor 15 and protection diode 16, measuring zener diode 17, Protection transistor 13 is filled with the same conductivity as intermediate transistor 7 connected by a collector

ten,

to the emn: the input transistor tter lu and em: the tter is connected to the input transistor collector, the connection between the emitter of the input transistor 10 and the second power terminal 4 of the valve synchronous generator is made through the measuring zener diode 17, and the base of the input transistor 10 and the middle of the resistive divider 12 directly connected, the second terminal of the protection capacitor 15; connected to the output 18 of the field winding of the synchronous valve generator connected to the output

5 with a switch 2, and the second output of the protection diode 16 is connected to the base of the intermediate transistor 7, the control transition of which is turned on by the protection diode 16,

0 A DC power supply with a device for regulating the voltage of a valve synchronous generator operates as follows. When the voltage at the output of the synchronous valve generator is less than a predetermined level, the measuring zener diode 17 is closed. Therefore, the input 10 and intermediate 7 transistors are closed, and the output transistor switch

0 2 is open ,, When the voltage on a valve of a given level synchronous generator of a given level is transformed, the measuring zener diode opens, which leads to opening of the input and intermediate transistors, closing of the transistor switch, decrease of the excitation current and voltage at the output of the valve synchronous generator.

In the process of closing the output transistor switch 2, the voltage rises on it, causing the protection capacitor 15 to charge through the protection resistor 14, the control junction of the protection transistor 13, the second 11 and the first 8 resistors. In this case, the protection transistor opens, forcing the process of opening the intermediate transistor and closing the output transistor switch.

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When the voltage at the output of the synchronous valve is lower than a predetermined level, the measuring stabilizer closes, which entails opening the output transistor switch, increasing the excitation current and voltage at the output of the synchronous valve generator.

The process of opening and closing the output transistor key occurs

periodically, while the voltage at the output of the synchronous valve generator is kept constant.

In the mode in which the closure of the winding of the excitation of the synchronous valve generator, the voltage at the output transistor switch increases, which charges the protection capacitor 15 through the control junction of protection transistor 13, opening of protection transistor 13, intermediate transistor 7, closing of the output transistor switch. After the process of charging the protection capacitor is completed, the protection transistor closes and the output transistor switch opens, after which the discharge of the protection capacitor through the output transistor switch and the protection diode 16 begins. Further, until the short circuit is eliminated, the processes of opening and closing the output transistor switch will be repeated with a certain frequency. .

. The resistance of the charge circuit of a protection capacitor is many times greater than the resistance of its discharge circuit. Therefore, the charging process will take longer than the discharging process, the output transistor switch is a large switch and part of the time will be closed, and the average current through will not exceed the allowable value.

In the self-excitation mode of a synchronous valve generator without a battery with an excitation current close to zero, the voltage at the output of the synchronous generator has a sawtooth shape.

With the growth of this voltage from zero, the protection capacitor 15 is charged, but the measuring zener diode 17 does not transmit a signal to open the intermediate transistor 7, since the generator voltage will not be enough to break the measuring zener diode. Opening the protection transistor in this case will not cause a false triggering of the device for regulating the voltage of the synchronous valve generator to close the output transistor, which prevents the increase of the excitation current. Therefore, self-excited valve synchronous generator will improve, and the reliability of

devices for regulating the voltage of the synchronous valve generator will increase.

Claims (1)

J claims A device for regulating the voltage of the synchronous valve generator containing the output transistor key connected between the first and second power outputs of the synchronous generator of the generator through the excitation winding of the last, shunted by the extinguishing diode,. J5 intermediate transistor connected by the emitter directly, and the base through the first resistor - to the first power output of the valve synchronous generator, the collector through the limiting resistor - to the second power output of the valve synchronous generator, emitter-collector junction - in parallel a control junction of the output transistor switch, the input transistor with conductivity, the reverse conduction of the intermediate transistor connected to the base of the intermediate transistor through the second resistor to the base of the intermediate transistor, a resistive divider output, the extreme terminals of which are connected to the first and second power outputs of the valve synchronous generator, an emitter - with the second power output of the gate synchronous generator, a protection transistor connected by a base through the protection resistor to the first terminals of the protection capacitor and the protection diode, measuring zener diode , characterized in that, in order to increase the reliability of operation by eliminating false positives, the protection transistor is of the same conductivity as the intermediate transistor, The collector is connected to the emitter of the input transistor, and the emitter is connected to the collector of the input transistor, the connection between the emitter of the input transistor and the second power output of the gate synchronous generator is made through the measuring zener diode, and the base of the input transistor and the middle output of the resistive divider are connected directly, the second the output of the protection capacitor is connected to the output of the excitation winding of the synchronous valve generator connected to the output five 0 five 0 $ 124D7826 a transistor key, and the second output transistor, the control transition of the protection diode, is connected to the base, the intermediate of which is switched on opposite to the protection diode. U2I .2 Editor M.Tovtin Compiled by A. Akimov Tehred N. Bonkalr Order 3927/58. Circulation 631 Subscription. VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, 4/5 Raushsk nab. Production and printing company, Uzhgorod, st. Design, 4. Proofreader L. Patay,