SU1474810A1 - Dc pulsed converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power sources. The purpose of the invention is to increase efficiency and improve weight and size parameters. The device contains a series circuit connected between the input and output pins from the control transistor 1, the first winding 2 of the additional drosel and the first winding 3 of the drosel of the filter 4. The filter capacitor 5 is connected in parallel with the load. Two strings are connected between the common terminal and the connection point of windings 2 and 3. The first consists of a series-connected reverse diode 7, a second winding 6 filter throttles, and an additional winding 10 introduced third winding 10. The second chain consists of the additionally introduced reverse diode 9 and the second winding 8 of additional chokes. The diode 9 and the winding 8 provide the return of energy stored in the additional choke to the load. In addition, the introduction of these elements eliminates the need for demagnetization of the magnetic circuit for additional drosellers. 1 hp f-ly, 1 ill.

Description

The invention relates to a converter technique and can be used to supply loads with controlled constant voltage.

The purpose of the invention is to increase the efficiency and improve the mass and size parameters of the converter.

The drawing is a diagram of the sentence rq converter.

The converter contains a control transistor 1 connected in series with the first winding 2 of the additional drosel and the first winding 3 of the drosel of the filter 4. Parallel to the load circuit, the filter capacitor 5 is turned on, and the second winding of the 6 drosel of the filter is connected in series with the reverse diode 7. The additional choke has a second winding 8, connected in series with the additionally introduced second reverse diode 9. A third winding 10 of additional chokes is connected in series with winding 6.

The device works as follows.

When the control transistor 1 is turned on, the reverse diode 7 is in a conducting state, and therefore a voltage equal to

.U,

and -i fi: ibi “+,

Uw. UllM TTT1 /

35

vi Un UTp

where U is the winding voltage of 2 additional chokes; UUn- power supply voltage;

willow - output voltage; 40

KTR-the transformation ratio of the droplet filter 4 „

The current of the diode begins to subside.

Due to the transformation with equal turns of the windings 2 and 8, an additional voltage, equal to the voltage of the power supply, is applied to the additional D5 reverse diode 9. After closing the reverse diode 7 due to the fact that the inductance of the additional drosel is much less than the inductance of the winding of the droplet of the filter, almost the entire voltage of the power supply is applied to the filter choke. After turning off the control transistor 1 55, the voltage on the windings of the chokes changes polarity and they begin to transfer the stored energy to the load.

Due to the magnetic coupling of the first 3 and second 6 windings of the throttles of the filter 4 on the cathodes of the return diodes, the voltage is set to (+ 1, which ensures the current drops of the additional throttles to zero during the off state of the transistor 1. At the moment of turning off the transistor, the windings of both The chokes are the same, and the winding current 3 of the chokes of the filter 4 cannot instantly change, so the additional reverse diode 9 is in the conducting state. Since the inductance of the additional chokes is much less more than the inductance of the filter throttles, so it drops more quickly.The total current of the return diodes remains equal to the winding current of the filter 3 droplets, i.e., as the current decreases linearly in diode 9, a proportional linear increase of the current dao-1 and 7 occurs. Thus, the reverse diode 7 is unloaded in power in each cycle, and at the beginning of its operation, when the throttle current is maximum.

The voltage across the control transistor L all the time while the additional reverse diode 9 conducts current is equal to the voltage of the power source. After the current drops to zero in it, the voltage across the control transistor is

 the device when turning on the transistor 1, in the stage of locking the reverse diode 7, an additional voltage is applied to the additional reverse diode 9

you

tt-ttt Јш tt uAon gh..h if and

H

one,

Wi

to.

KTf LW, + LW, lh

e LW is the inductance of the third winding 10 additional drosellers;

, Lw - inductance of primary 3 and secondary 6 windings of the throttle filter;

CT - the transformation ratio of the third and second windings of additional droplets. The voltage on the regulating transtor 1 after turning off the additional diode 9:

R

U u Uebj t-reg. i к, р, (i

+ U

you

 + Li

Wz

Krp

where is the transformation ratio

the first and third windings of additional throttle. Since the inductance of the third winding 10 of additional drosellers is significantly less than the inductance of the windings of the droplets of the filter 4, the voltage transformed into the windings 2, 8 is not large and does not affect significantly the operating mode of transistor 1 and diode 9. The third winding 10 is intended to continue demagnetization magnetic circuit additional throttle load current after locking additional reverse diode 9.

Claims (2)

1. A DC pulse converter containing 25 input, output and common leads for connecting respectively a power source and a load circuit, a series circuit connected between the input and output terminals and consisting of a series-connected regulating transistor, the first winding of an additional drossel and 0 5 o the first winding of the filter throttles, the filter capacitor connected in parallel to the load circuit, as well as a series circuit of the first reverse diode and the second winding of the filter throttles, connected between the common connection point of the winding end of the additional throttle with the beginning of the first winding of the filter throttles and the common output differing from that, in order to increase the efficiency and improve the overall dimensions, the additional choke is equipped with a second winding connected in series with the additionally introduced second inverse house and connected to the beginning of the common terminal, wherein the second electrode lead free Homo inverse diode is connected to the same electrode terminal of the first diode, and reverse the common point with the first additional choke filter choke coil winding compound. 2. The converter according to claim 1, stating that the additional choke is equipped with a third winding through which a serial circuit is connected from the first reverse diode and the second winding of the filter throttle to the common output, and the end of the third winding is connected to the common output .