SU1704245A1 - Dc/dc converter - Google Patents

Abstract

The invention relates to converter equipment and can be used in systems of secondary power supply for industrial installations, in particular, for charging a capacitive storage device. The purpose of the invention is to increase efficiency. The converter contains a power supply 1, a transformer 2 with a primary 3 and a secondary 4 windings, a transistor 5. diodes 6-8, capacitors 9.10 and choke 11. Throttle 11, capacitor 10 and diode 7 are connected according to a resonant circuit. The locking of the tramistor 5 takes place at a current lower than the maximum, which reduces switching losses. 2 Il. с с Ш 77 RH ч about 4 х ь СП

Description

Fig. /

Imo & p PeyI Z Pmoi | T; .ch to i: pt..3Oba-yulmol kg / pike and -ozhs., Oy. / / Use :.-.110 P SISGSM ;.X TORCHIFPS GODYFOLYUNIYA

promiotion of mouth; lk ;. for charging capacitive storage.

Goal isoorst; and. - position & efficiency efficiency, nose reduction and yy-bori-o -: - transducer.

FIG. 1 shows the circuit5 of the converter; in fig. 2 - vpdto / .i iolgss-to the mountain of the transistor.

Transform, co;, -: p - ;; ir source 1 ninai and -. ;;, transformer 2 with a cylinder 3 and secondary 4 ot.j oTKCMVi, trz: and; tor 5, first G. IT.sroy 7 1 : tracks / - o diodes, u also-9 and second 10 condepsyrs and throttle systems 11.

The product is as follows.

When the source is connected: on 1 of the power supply, the transistor 5 is opened and the source voltage is applied to the primary terminal 3 of the transformer 2. and 1 gg: I.I. EMF of the secondary winding 4 of the transformer 2 n is pplepleng, so that the transistor 5 is kept open. The charge of the second capacitor 10 on the circuit begins: the secondary winding 4 of the transformer 2, the choke 11, the third diode 8. the emitter transition - the base of the transistor 5. By the inclusion of the chokes 11, the charge current of the second capacitor 10 changes according to a law close to x sinusoidal. The collector current of the transistor 5 is made up of the douh components brought to the primary winding 3 of the charge current of the second capacitor 10 (i t) (Fig. 2) and the unresponsive current. transfer.) atorz (c;). The voltage on the second capacitor 10 begins to increase, and the hedgehog goes through no; o, kgk and the current of the bchza transistor 5 varies in a sinusoidal manner. With decreasing: 1 of the base transistor current 5 to a certain value, it goes tj the linear mode and .chiphope.

The magnetic field transfer module 2 includes a laser with low magnetic permeability (for example, alsiphsra), or with an air gap, therefore, when locking the trach cure, there is 5 electromagmitic energy, zapsennyy mnogropropod -. It begins to flow through the (first covered diode G D perpium comdemspore 9 and the load. At the same time, the torus is connected to the condenser from the 10th chor. 3 .n – yktypnoschich tornogo OG) MOT.-PI A 1 P, rpm. DC-D (3 N

capacitor 9 and nlg L .V. one ,)".;;. of the second .. throats i: and .. according to lacOn, OPI. OM To CiU .0..1D; -ABOUT ,

lioc ie komdepS PPG a 10 to iopopogo 1; /, pr / geni..- o. the second diode 7 is arrested and then /, through nopt) i.i.: diode b begins to change according to the following; 1: ps / law. After decreasing the ATC; -: about to zero, the transistor 5 is open and;; ::; ; ts and POC psozzos and the pattern are repeated. B april sn: .m; The paired capacitor 9 increases, and at a certain value of it, the voltage paapu /.-j of the condenser is 10 ate.

0 Novices 6o,; Luie Nooch. The second diode 7 is locked, and the current goes through ,. Globally, the capacitor 10 varies according to a law close to the segments of two sinusoids, with the current and charge and charge being determined

5 throttle; m 11, and the current: orem - B By the inductance of the secondary winding 4 of the transformer 2.

An appropriate design of transformer 2 for the drossel function 11 m0 (; m, the impedance of the leakage inductance trg -; c-) of the ormator 2 and the choke 11 can be reduced.

Ec.ni i DC converter operates on a 5 capacitive / Mi copy capacitor, the discharge voltage of which exceeds the voltage of power supply 1, the first capacitor 9 and the load should be connected to the other pole of the power source 1. NpeoSV coefficient

0 breaks when the atom rises by one.

In SR.LASI with the fact that the locking of the transformer 2 occurs at a current lower than the maximum (1 m). switching losses in the proposed onertor are much lower than in the known.

The combination of the resonant and classical modes of operation of the converter pos-ZE-ollet to increase the frequency of conversion,

0 which means that the size and weight of magnetic elements will decrease.

Tested: converter mock-ups according to the proposed and well-known circuit with the characteristics: primary

5 1pr; ; ein (; 12 V: 1PO microfarad storage capacity; charge energy 80 J; discharge frequency 1 Hz.

Tests have shown that the proposed efficiency has an efficiency of 7% more,

0 and the weight is 30% less than the known one at a specific cost of MOUVHGCTH of a thermoelectric thermoelectric generator 1000 rub / W.

Claims (1)

Invention Formula 5 Ploobrazoat.- constant voltage. soder; - D) trrnzpglor. the emitter of which is connected to the rgr. it go - 10,;, y, and kolg..chK r with dynon with you XOJJMUM output 1; -: ;;. ps ps match oG. -njivy tg-insfg rm.tgora. Mr. -.-. .. Py h (perturba The windings are connected through the first diode by the first output terminal and the first terminal of the first capacitor, the second terminal of which is connected to one of the similar terminals, the second capacitor shunted with a diode diode, the third diode connected by the first terminal to the base of the transistor, characterized in that increase efficiency. A choke is connected between the second output of the third diode and the first output of the secondary winding of the transformer, the second lead of which is connected to the first lead of the second capacitor, the second lead of which is connected to the first input lead connected to the second output lead. / to : 2