SU1330620A1 - Impulse step-up direct voltage regulator - Google Patents

Abstract

The invention relates to secondary power sources of radio equipment. The aim of the invention is to expand the range of output voltage control. The goal is achieved by the fact that the filter choke 2 and transformer 6 are made with additional windings 12 and 14 connected to each other through diode 13. During the closed state of transistor B, the voltage on winding I2 changes its sign and through diode 13 goes to winding 14 In this case, a reverse magnetization reversal of the current transformer 6 occurs and the diode-resistor circuit 15 limits the voltage at the base-emitter junction of transistor 8 to the maximum allowable value. 1 il. h 3 (L

Description

The invention relates to electrotechnical engineering and can be used to power radio engineering devices with a constant voltage higher than that of a primary power source.

The purpose of the invention is to expand the range of output voltage control.

The drawing shows the electrical circuit of the proposed stabilizer.

A DC boost voltage regulator contains a filter choke 1, one output of winding 2 through power diode 3 connected to output terminal 4, another terminal to input terminal 5, current transformer 6, the primary winding 7 of which is connected between common point of throttles 1 and power diode 3 and the collector of the regulating transistor 8, the emitter of the regulating transistor 8, connected to the common bus, the base winding 9 of the current transformer 6, the control unit 10 connected by the input to the output terminals 4, and the output to the control guide 11 winding current transformer 6, additional winding 12 of the choke filter 1 connected via an isolating diode 13 to the additional winding 14 of the transformer 6 current diodnorezistornuyu circuit 15 connected to the transition bazoemitternomu regulating transistor 8, the output capacitor 16.

The device works as follows.

The control unit 10 controls, through the winding 11 of the current transformer 6, using short pulses, turning the control transistor 8 on and off. The control transistor 8 is kept open during the time t due to the positive feedback between the windings 7 and 9 of the current transformer 6. The process of energy accumulation in the filter choke 1, received from the primary power source through the input terminals 5, takes place. During the open state of the control transistor 8, the change in induction in the current transformer 6 is equal to LV. The voltage on the additional winding 12 droplets 1 is chosen greater than the winding 14 of the current transformer 6,

VI does not affect, due to the closed day 1 3, the value of B. When the closing impulse arrives from the control unit 10, the control transistor 8 closes and the energy accumulation in the filter choke 1 stops. The voltage on the winding 2 of the droplets 1 of the filter changes its sign and, summing up with the input voltage, through the diode 3 enters the output capacitor 16. The voltage on the winding 12 of droplets 1 changes its sign, through the diode 13 enters the winding 14

transformer 6 current. Going on

reverse magnetization reversal of the current transformer 6 by the value of induction LV. The diode-resistor circuit 15 limits the voltage at the base-emitter

transition during reverse reloading tf, to the maximum allowable.

For the normal operation of the device, it is necessary to perform equality

BH BG,

(one)

In case of equal turns of the windings 9. And 14 of the current transformer 6, equality 30 (1) can be represented as

Ug-t, and ,,. t.

(2)

where and and are the voltage across the windings 9 and 14 of the current transformer 6.

The voltage on the winding of 12 droplets 1 filter, and accordingly on the winding 14 during tfl closed from the side of the control transistor 8

40

and and. t tn with.

(3)

where is memory; - input voltage of the primary power source; g U) j- the number of turns on the windings

12 and 2 choke 1 filter. Substituting (3) into (2), we obtain

and.

and

W

P

sn U,

(four)

Thus, equality (1) holds for all ty and t, i.e. Hf: depends on output voltage.

The proposed DC voltage regulator provides wide limits for adjusting the output voltage higher than the voltage of the primary power source.

 1330620

while maintaining a high power secondary winding of the current transformer, the indicators and circuit are connected in series with the diode diode and the resistor to the common bus, the control unit,

The impulse step-up stabilization input of which is connected to the output torus of the direct current voltage, with the terminals, and the output to the control holding filter choke, one of the current transformer connectors whose input is connected to the input transformer, the capacitor connected to the output and another through the power diode, including the terminals in the forward direction, with the fact that, in order to expand the range terminal, the current transformer, the control area of the output voltage — the primary winding of which is the connection, the filter choke and transfo - to the common point between choke-fklt Matora provided with additional current and power diode Dr and the collector pe-, gobmotkami interconnected regulates transistor, the emitter-to paralelio inputted through Section - torogo directly and base chereztelny diode.

Claims (1)

Claim A pulsed step-up DC voltage regulator containing a choke filter, one of the terminals of which is connected to the input and the other through a power diode, turned on, θ in the forward direction, with an output terminal, a current transformer, the primary winding of which is connected between the common point of the filter inductor and the power diode and the collector pe-, g of the walking transistor, the emitter of which is directly, and the base through the secondary winding of the current transformer and a chain of series-connected diodes and resistors are connected to common bus, the control unit, the input of which is connected to the output terminals, and the output - with the control winding of the current transformer, a capacitor connected to the output terminals, characterized in that, in order to expand the range of regulation of the output voltage, the filter inductor and current transformer are equipped with additional windings interconnected in parallel through the input diode.