SU1345299A1 - Bridge-type voltage converter - Google Patents

Abstract

The invention relates to a regenerative technique and can be used as an uncontrolled or controlled secondary source of constant voltage power. The purpose of the invention is to expand the scope of application. Due to the formation of a new compound according to the P-scheme created by the introduction of additional sections, j Y provides an additional function of the phase shift. In the case of converting elements 1-12 controlled, it is possible to use a simplified control algorithm. 3 il. X a and I .. y / - / L L 4A V V 7 with s / U g 2 C J LJllzlill about 15 CO 4 cl with co with Fi. one

Description

The invention relates to a converter technique and can be used as an uncontrolled or controlled secondary power supply (VIN) of a constant voltage.

The purpose of the invention is to expand the scope.

Figure 1 shows the circuit diagram of the converter | Fig. 2 shows the same, in topological form; Fig. 3 shows a vector diagram of current-forming EMF, or sign-based L-shifted pulses 5, (, ui S 1 2) 5 representing in the phase plane the output voltage During one period of the converted EMF, At the same time, in Fig. 3 at S | C, the numbers of the bridge's currently open converting elements are indicated, as well as the connecting lines shown in FIG. 2 between the pair of which the largest EMF is formed in this time interval ). The converter of FIGS. 1 or 2 contains twelve conversion elements (PE) 1-12, assembled into a six-cell valve bridge 13, the DC outputs 14 and 15 of which form the output transducers. -The load 16 can be connected to it.

To the terminals of the alternating current of bridge 13 are connected: the three-phase valve winding 17 of the electromagnetic device (in particular, the transformer T). J and the winding 17 contains three sections ax in the frame of the three phases,

,; B, cz, the first of which are connected in a closed triangle., The second sections adjacent in phase are connected to the taps a, b 5 of the first sections, and ah in the direct order of the index sequence of the phases 5 a to the terminals a (i.msm) , b (or z), c (il1 1 x) of the first sections forming vertices of a triangle, the third additionally entered sections J ,, are also adjacent in phase to the data but connected to them in the order of inverse index sequence of phases and unlike in phase the first two sections that form a given vertex of the triangle O These complement nye section (for example) together with trv- ugoshznikom abc first sections form a compound which, when topology x, C2-7 ..

The image in the phase plane resembles the letter P, in connection with which such a connection scheme is referred to as the P-scheme.

It is due to the formation of a new connection by the P-scheme created by introducing additional sections into the device that an additional function is provided (phase shift j while simultaneously maintaining the important property of the known converter at the twelvefold frequency of their pulsation (), which is achieved by

5 possible choices are appropriate; their number of turns of individual winding sections and parts of the first sections. These numbers of turns of the first section and equal to the second and third sections, as well as 0 turns of the small part of the first section from the beginning to the retraction can be set in each phase in ratios ax; (): (2) 3-1) -and: t a. .

5 In actual voltage values, taken relative to the average value of V, the output voltage U in the idle mode, this corresponds to 7Г (2 + UZ) / 12У2: / 12 6 and:

0; iO, 691: 0, 1069 and 0.1069: 0.2138.

The device of FIG. 1 or 2 works in the following manner.

As follows from Fig. 2, the total number of linear emfs formed between each pair of connecting wires or 5, which is the same, any pair of lines connecting the winding 17 to the bridge 13 in Fig. 1, is equal to fifteen. Of these, only six am40 pounds more than the rest:,

r, b,

a ",,,,, topological image of the circuit in Fig. 2. Such EMFs are formed between diagonally located connecting terminals and exactly the data. After they are straightened, they are formed by means of a six-cell fan bridge 13 on its terminals 14 and 15. —constant voltage U It is co-50 (FIG. 3) holds twelve phase-shifted pulses S, (/ 11 1.12) for one period of the converted EMF.

The level of pulsation over its full gg swing, relative to V, in idle mode, is 3.45%, and this low level was achieved without introducing additional phase-shifting and filtering devices.

The converter (Figures 2 and 3) is provided with a phase shift of 15 electrons of the current-emf system relative to the system of convertible electromotive forces, which is shown in FIG. From the comparison of the amplitude of the DEDS equal in FIG. 2 to the distance between c, and b, and the puddle II

-. 2 and the determining am-, output voltage Ug with the amplitude of the emf in the first sections, equal in FIG. 2 to the side ah of the triangle abc, it follows that the device has a corresponding increase in the amplitude.

In the case of performing PE 1-12 controllers, it is possible to use a simplified control algorithm and control system as a whole, since the control signals (FIG. 3) can only be sent to each jt-th discreteness interval to one of the PEs, in particular when adopted in FIG. , 1 positional numbering - on PE 1,4,6,3, 5,8,10,7,9,12 and 2. It is possible to use pulse-width modulation, other methods.

Claims (1)

The invention The bridge voltage converter containing an electromagnetic device, the three-phase valve winding of which is divided in each phase into two sections with a ratio of turns 1: (2 // 3-1), the first sections are connected in a closed triangle and have Q in each phase is a tap to which the second section is connected in phase with one phase of the second section in the order of the index phase sequence, and the free terminals of the second sections are connected 5 to Tpej of the six AC terminals of the six cell valve bridge, characterized in that, in order to expand the field of application, a third is introduced in each phase The 0 section, which is made with the number of turns equal to the second section, is connected to the vertex of the triangle by the first sections of the given vertex opposite in phase, the second and third The 5 sections are connected to this first section in a different order of the index phase sequence, and the first section is retracted from the double number of turns relative to the turns of the second section. (pi / s.2 D7 - // GOKH; I. 2} b, -) (Y / (, -.9,2} .., (s, 2, .7.ha) 4 ..;) (bgCziff mS - $ b (.8) fig.Z