SU1206921A1 - One-step transistor converter with transformer current feedback - Google Patents

Description

The invention relates to a converter technique and can be used in pulsed stabilizers and voltage converters.

The purpose of the invention is to improve the overall dimensions.

The drawing shows a diagram of the device.

The device contains a power transistor 1 connected by a collector circuit to a current winding of a current transformer 2, the first winding of which through a parallel circuit consisting of a capacitor 3 and a diode 4 is included in the base circuit of the power transistor 1, two auxiliary transistors 5 and a reverse 6 conductivity whose emitters and bases are interconnected. The collector of the auxiliary transistor 6 reverse conduction is connected to the second winding of the current transformer 2. An additional capacitor 7 is connected between the point of connection of the emitters of the auxiliary transistors 5 and 6 and the connection point of the second winding of the current transformer 2 with the first isolation diode 8, which is connected to the collector of the auxiliary transistor 5 direct. conduction and through the power supply 9 and the limiting resistor 10 to the collector of the auxiliary transistor 6 of the inverse conductivity, and the limiting resistor 10 is shunted by the second decoupling diode 11,

The device works as follows.

ten

12069212

With the corresponding polarity of the control pulses, the auxiliary direct-conducting transistor 6 is turned on. When this second winding of the current transformer 2 is connected via the second decoupling diode 11, an additional capacitor 7 to the power supply 9 causes the power transistor 1 to turn on. The collector current of this transistor starts to increase, while passing the current transformer 2 current. When reaching the collector current of the power transistor 1

15 of a certain value, the second winding of the current transformer 2 can go from consumption mode to generation mode, which can lead to failure of 5 and 6

20 to reduce the efficiency of the device. To eliminate this, a first decoupling diode 8 and a limiting resistor 10, an additional capacitor 7, which is charged through 25 a direct conductive auxiliary transistor 5, is discharged to the second winding of the transformer reverse current conductor 6,

30 In this case, the power transistor 1 is turned off and the core of the current transformer 2 is remagnetized. Thus, by introducing an additional capacitor,

jr use a current transformer with only one control winding, which simplifies the transformer - and requires only one power supply to operate. The proposed device can be implemented on the element base of the known device.

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Compiler B, Handogin Editor N, Pushnenkova Tehred T. Tulik Proofreader A, Zimokoso in

Order 8731/57

Circulation 632

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Filial PIP Patent, g, Uzhgorod, st. Project, 4

Subscription

Claims (1)

A SINGLE-STROKE TRANSISTOR CONVERTER C. A CURRENT TRANSFORMER FEEDBACK, comprising a power transistor connected by a collector circuit to a current winding of a current transformer, the first winding of which through a parallel circuit consisting of a capacitor and a diode, is included in the base transistor of the auxiliary transistor and the inverse transistor and the auxiliary transistor conductivity, emitters and bases of which are interconnected, and the collector of the auxiliary transistor of reverse conductivity is connected to the second winding of the transformer a current, two decoupling diodes and a limiting resistor connected to a power source, characterized in that, in order to improve overall dimensions, an additional capacitor is inserted into it, connected between the connection point of the emitters of auxiliary transistors and the connection point of the second winding of the current transformer with the first decoupling diode, which is connected to the collector of the auxiliary transistor of direct conductivity and through the power source and the limiting resistor to the collector of the auxiliary transistor ra inverse conductivity, the limiting resistor shunted second decoupling diode.