SU1654947A1 - Two-phase six-beam voltage converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used as a low-voltage secondary power source with a sixfold pulsation frequency of the sign-constant output voltage in the presence of two phases of the source

Description

is smiling

SL 4

to

Ј

1

Variable voltage with a phase shift of 120 e. hail. The purpose of the invention is to expand the circuit-functional capabilities and the field of application. The device contains six converting elements 1 - 6, one electrodes of the same name which form one, two, three and shi six output pins of one polarity, and a source of two EMF, divided into three phases in one phase and four sections in another. The midpoint of the first section of the first phase forms the output polarity of the other polarity, and the corresponding conclusions and taps of the sections of the invention relate to electrical engineering and can be used as a low-voltage secondary power supply with a sixfold pulsation frequency of the sign-variable output voltage with an alternating voltage source with a phase shift of 120 al.

P "

The purpose of the invention is the expansion

circuit functionality and the scope of the application

Figure 1 shows a circuit diagram of a two-phase six-beam voltage converter I providing a phase shift Cp of the output voltage envelope with respect to the EMF variables forming it in subrange 30 el. 2, a vector diagram of the formation in the phase plane of six pulses S / y ((U 1.6) of the output sign-constant voltage Ue, explaining the principle of the device of FIG. 1 during one period of the converted EMF, in Fig. 5 and 4 - the same, for the subrange of the angle Cf Ј 30, 60 ° el. of. in Fig. 5-8 - the same, private implementations at (0 0 and 60 e. deg, respectively, in Fig. 9 - dependence on the angle L0 of the total numbers of turns of all sections of the valve winding (VO) of the electromagnetic apparatus or the total amplitude of different EMFs, as well as individual total values EMF (VO turns) in phases a and b, in Fig. 10, are connected to each other and with other transducer electrodes of the same name - elements 1-6. The change in the position of the taps when the ratios of sections, half sections and their parts are established provides the phase shift of the output voltage envelope with respect to the EMF that forms it, which characterizes the achievement of the integration of a number of functions in one device and, consequently, the corresponding savings due to the absence of devices usually used to accomplish the same functions. 8 hp f-crystals, 2 tab., 16 ill.

0

five

0

five

0

five

the same for the relative values of the corresponding sections and their parts; in figures 11 and 12 - the same as in figures 1 and 2, for the particular case (0-30 °; in figures 13 and 14 - the same, a fragment of three transducer elements (PE) connected together through the United according to or opposite to the half-section of one magnetically connected (made on a single magnet conductor) current separation element with a midpoint forming the output terminal, in particular, through the winding of a two-phase equalization reactor (UR) or through two magnetically unrelated elements (in particular, through the windings of the chokes C and b), in Fig. 15 and 16 - the same, when connected through three drossel or one three-winding (three-phase) SD three times two combined PE.

The device (Fig. 1) contains six PEs 1-6, numbered in the order of their natural operation in a given circuit of the current path during one period of either of the two converted source EMF, shifted in phase by 120 eh.grad. The same electrodes of all PE 1-6 (the cathodes in figure 1) are combined with each other and form a positive output terminal 7. In general, these PE 1-6 electrodes can also serve as corresponding independent outputs.

The converter also contains a two-phase source of EMF variables, which can be implemented, in part

on the sections of the valve BO 8 electromagnetic apparatus (EMA). As an EMA, an electric machine, a transformer (in particular, two single-phase transformers), a parametric system, and other similar devices are used. The positive direction and the corresponding phase shift of the EMF are shown in FIG. 1 by large arrows at the phase sections of the BO.

In the first phase, the source of the EMF or VO 8 EMA is divided into three (ah, a, x, ayyyy), and the second - into four sections by, b, y, y, y, and, b, y are electroplated divided by semi-section of the first section with a midpoint, the retraction of which is converted into two outputs of separate half-sections. The middle point O of the first section ah of the first phase forms a different (negative in FIG. 1) output terminal 9. A load 10 may be connected between terminals 7 and 9.

Zyvody a and x of the first section ah of the first phase are connected to opposite terminals t of the y and b {second and third sections of the by and bfy, the second phase of the source EMF. To the terminals b and y of these sections, as well as to the outputs y and b3 of the first section of the second phase, divided into half sections and b3ue, four PEs 2, 5, 6 and 3 are connected by different electrodes (anodes in figure 1).

The second and third sections of the by and b, the second phase of the conclusions y and b are connected according to the conclusions a and x of the first section of the first phase of the first phase, to the input taps a and a of which are connected counter and b, respectively, according to the half section

L2U2. And b3u3.

The second and third sections afx, and the first phase, by one of the opposite leads a (and x, are connected one to the other electrodes (anodes in FIG. 1) and the rest of PE 1 and 4. The other leads hh and ag these sections are connected one by one according to , respectively, counter to two taps b and b (second and third sections by and bfy, second phase.

In this case, the second sections a, by the first and second phases can be equal to their third sections ay, b, y ,. Regarding each bayz half section,

The second phase, and from the entered.

 the first section of vt is also part b y (b, b,)

76

tap b1 (b,) of the second (third) section of it by (b, yf) to its output y (b () attached to the phase-adjacent section ax, specified sections a (x, and by can be set in ratios (a , x (a, xz) :( by bfy ():: (bty2 b3y3) :( b y b, b () sinq: cos (30 °): c..s (30 °)::, and a half section ao (oh) of the first section of the green phase and its part a o (oa) from the additional branch a (a) to the midpoint O – in the ratios (ao oh) :( a oa a) sy (y + 30 °): sin ( o, where (J b, ZODal.grad. is a certain phase angle determining the time shift of the envelope of a given output voltage pulse relative to the generator ED C, and the right bracket means that the angle value belonging to it belongs to this subband without excluding it. The data in Tables 1 and 2 clarify the operation of the proposed converter.

The device (figure 1) works as follows.

The alternating electromotive forces of the two phases VO EMA are converted by means of PE 1-6 to a constant voltage U0 containing, for one period of the emf, six enopacular pulses 3 / c (D 11b, Fig. 2). Each pulse is formed by adding different in size and the phase of the converted EMF, the principle of vector formation and the phase shifts of the pulses are dreams of FIG.

The constant voltage U0 (Fig. 2) at load 10, while respecting the specified ratio of these parts, emf pulses with a sixfold frequency relative to the ECS frequency (P 6) with a relatively low ripple level, theoretically equal to 14% in full span relative to V. Thereby constant value

at the load 0 blre to the amplitude value of the pulse vo 3 / Shiro 0.955 U0 (J.

When the position of the taps changes in accordance with the established ratios and directions of the small arrows (Fig. 1), the output voltage envelope is shifted in phase by the angle C within | B; 30 email hail, relative to the EMF forming it, which is shown in Fig.2 by the example of the first pulse S. This characterizes the combination or integration in one set of 10

15

20

A series of functions — transformations of the type of voltage, frequency, and level of the pulsation, as well as changes in the phase shift of its envelope, provided without the introduction of special phase-shifters, filpositions, and frequency multipliers.

Private implementations corresponding to the extreme values of the first angle subrange (I, are simpler than the general design shown in Fig. 5 and b 0 | 0) and Fig. 11 and 12 (Wed 30 °). Before this, the second and third sections of the first phase, as well as all parts of the first section and parts of both sections of the second phase (FIG. 11) are the same, and in Figure 5, the half sections of the first phase sections and the second and third sections of the second phase are the same.

The schemes at intermediate values of angle 4 in this диOj30J subband are similar. The specific values of the sections, half sections and their parts, as well as the nature of the change at different angles Cf, illustrate the curves in Fig. 10 using specific numerical data in Table. one.

Such a multitude of new basic circuits 30 with the same sixfold frequency of the voltage ripple on the load 10 also provides another general version of the converter (Fig. 3). Being an alternative to the previous one, it corresponds to another subband range of the Ts-30 angle, el. hail. Therefore, the principle of operation of the schemes of this subrange is similar to that considered. In spite of other connections than in Fig. 1, this version (Fig. 3) also partially combined the participation of the corresponding parts of sections B (in the work of different circuits for the formation of phase-shifted pulses (Fig. 4), as a result, the total number of turns of VO decreases

Dependencies (Fig.9) values

.g 6.11

 gaiwufi „WITH Јf“ fPiri arcctg (3-Ш “1.0,8934 ° to 11 ° and

C {C (X2 60 ° -CfXffc49, 1066 ° 49.1 °, respectively. Four times (two times in each sub-band)) the winding number is equal to the typical three-phase six-beam scheme: Ug-ar, 6 with Cf Cf , 0 °; IP 2fx, 21.7868 °, Cf 30 + (30) 60 -, 33.2132 °, and q% 60e, respectively.

At f C arctg (-j3Y2) 30 + + (fy. Ј 40.8934 ° fi, 41 ° the total turns or amplitudes of the ECS sevdg different phases ai b are the same ((Ј) 3.024. G0a Ya

In general, i.e. at any value, the turn number, which is the sum of the numbers of turns of the phases O and b, varies according to the cosine-coded law, and in the first subrange of 30 ° $

25 Wfcq (Cf) - Wzeq + Wgab- 4K1 / 4) cos (Cf- -30 °) + costol ".6,1 1 cos (cp-CPK (), and at V (, 60 ° 3 as 6.11 cus (which, for particular values of the angle Cf, is shown in the table and figure 9.

The relative values indicated in the table and in FIG. 10 are marked with a bar at the top (for example, ao, by, ...) differ from their absolute values (without a bar) by a factor of, i.e. n () n The effective values of voltages on the same parts of the VO sections relative to the average value V0 of the output voltage in mode XX are indicated in the table with an asterisk.

4Q Moreover, for any values of the angle ((i.e., (, 60 ° J), the value is (2U3– | e) gG O, 855p. Also, for any Cj, the equalities ao are observed

35

45

ox j a | xi Я2.Х1 by b, b / ja o

- by L4y,: L, Y3. But at 30 ° D the value of ao is: a

Oh

iAf t

ao

Oh,

}

and with VtpeDc; 60 ° J

i o. This is due to the comparative simplicity of the EMF values (FIG. 10) for this complementary set of circuit realities of the angle-p, which are a mirror image of the curves of the previous sub-band. Moreover, the number of Wy -s is minimal only once in the whole range Ц, G, 60, and

of FIG. 1 and 3.

Considered a double set of new basic circuits with a sixfold pulsation frequency (P "6) can be further increased by several

it is at Cp 30 °:) times, if you form not one, like paj U / -4 5,774. It is maximum twice (once in each subband), and both of these values are the same:

it (Figs. 1, 3, 5, and 11, and two, three, or six autonomous exits for connecting the corresponding number,

0

five

0

thirty

.g 6.11

 gaiwufi „WITH Јf“ fPiri arcctg (3-Ш “1.0,8934 ° to 11 ° and

C {C (X2 60 ° -CfXffc49, 1066 ° 49.1 °, respectively. Four times (two times in each sub-band)) the winding number is equal to the typical three-phase six-beam scheme: Ug-ar, 6 with Cf Cf , 0 °; IP 2fx, 21.7868 °, Cf 30 + (30) 60 -, 33.2132 °, and q% 60e, respectively.

At f C arctg (-j3Y2) 30 + + (fy. Ј 40.8934 ° fi, 41 ° the total turns or amplitudes of the ECS sevdg different phases ai b are the same ((Ј) 3.024. G0a Ya

In general, i.e. at any value, the turn number, which is the sum of the numbers of turns of the phases O and b, varies according to the cosine-coded law, and in the first subrange of 30 ° $

5 Wfcq (Cf) - Wzeq + Wgab- 4K1 / 4) cos (Cf- -30 °) + costol ".6,1 1 cos (cp-CPK (), and at V (, 60 ° 3 as 6.11 cus (which, for particular values of the angle Cf, is shown in the table and figure 9.

The relative values indicated in the table and in FIG. 10 are marked with a bar at the top (for example, ao, by, ...) differ from their absolute values (without a bar) by a factor of, i.e. n () n The effective values of voltages on the same parts of the VO sections relative to the average value V0 of the output voltage in mode XX are indicated in the table with an asterisk.

4Q Moreover, for any values of the angle ((i.e., (, 60 ° J), the value is (2U3– | e) gG O, 855p. Also, for any Cj, the equalities ao are observed

35

45

ox j a | xi Я2.Х1 by b, b / ja o

- by L4y,: L, Y3. But at 30 ° D the value of ao is: a

Oh

iAf t

ao

Oh,

}

and with VtpeDc; 60 ° J

i o. This is due to the comparative simplicity of a significant set of circuit implementations of FIG. 1 and 3.

Considered a double set of new basic circuits with a sixfold pulsation frequency (P "6) can be further increased by several

once, if you form not one, like pajraz, if you form not one, like pajne (Fig. 1, 3, 5 and 11, but two, three or six autonomous outputs to switch on the corresponding number -,

loads of either one load through two (Fig. 13 and 14), three (Fig. 15 and 16) or six current separation elements - chokes coils, a surge reactor, etc.

At the same time, when describing the principle of operation of the device in the case of a connection scheme, two PEs are twice (Fig. 13) in the designations of the forming pulses and the output voltage, the superscript (2) is used, and for the connection scheme three times two PEs (Fig. 15) superscript (3). The fragments of the compound (Figs. 13 and 15), taking into account the PE numbers indicated on them, refer to all possible basic realizations derived from Figs. 1 and 3 ie for any values of the angle C, but the vector diagram, which explains the essence of the operation of the circuit of FIG. 13, is given for the purpose of simplification and specification only for the case of U 30 (Fig. 11).

When forming this output -. The impulses Sn, (Figs. 13 and 14) and S (Figs. 15 and 16) simultaneously work in the first case two, and in the second three current circuits that are currently connected in parallel through the corresponding open PE one total load for them. Such simultaneous operation of the circuits is shown in Figs. 14 and 16 by two parallel lines (//) t placed on these diagrams between the numbers of PEs indicated on them that conduct the load current in a given time interval.

Introduced dividing inductive elements (two droplets L j, L2 or one two-phase UR, Fig. 13) create an additional phase shift of the output pulses S ", (Fig. 14) relative to the INITIAL PULS S flj

(Fig. 12). Moreover, this shift is in this case 30 el.

With the introduction of three separation chokes (or one triple UM) (Fig. 15), the output pulses sЈ (Fig. 16) coincide in phase with the initial ones (Fig. 12), but the amplitudes of the output voltages decrease in either case. (Fig. 14 and 16). In the first case, i.e. in the circuit with L |, zr (fig. 13), the amplitude U 0 (fig. 14) of the pulses is f5 / 2 relative to the amplitude Uao xx of the output voltage U0 in the circuit without

t

ten

15

20

,

25 10 11) or with them (Fig,

thirty

35

40

45

50

55

, f, L2 (fig. in mode xx).

Such a decrease in amplitudes is shown in Fig. 14 with two parallel dotted circles with equal larger circumference of the source shown in Figs. 2, 4, 8 and 12. In accordance with a decrease in pulse amplitudes, the average value V of the output voltage for any implementations of Fig. 1 and 3 with an inductive separator element for flg. 13 makes () (AO, 827UaoX) t and such a value, despite II 6, coincides with the well-known three-beam scheme with a threefold pulsation frequency (P 3), with a characteristic, however, negative effect - a constant magnetization of the magnetic circuit .

The reduced amplitude value of U0JQ in the circuits of FIG. 1 and 3 with elements of FIG. 15 is shown in FIG. 16 by a smaller circle, and such a value, despite P 6, is 2/3 k-0.67 with respect to Uao xx with an average value of the output voltage VЈ (2/1 G) iaoXx "0.637UaoXx, equals the nominee provided by the known two-beam scheme with the same value of aohx but with the characteristic only double pulsation frequency ().

In addition to expanding the functions by providing a multichannel power supply with one circuit-wise and structurally combined device, it is executed according to the type of connections in FIG. 13 and 15 allow additional functions to be implemented — an additional phase shift (FIG. 14), a decrease in the voltage amplitude at the load to levels of 0.866 (FIG. 13, 14) and 0.67 (FIG. 15, 16) relative to the amplitude provided by the absence of inductive-separating elements.

At the same time, the amplitude of the current through PE 1-6 and sections VO, respectively, decreases 2 (Fig. 13) and 3 times (Fig. 15) while simultaneously extending the duration of current pulses through each PE into 2 (up to 120 °, Fig. 13 and 14) and 3 times (up to 180 °, figs. 15 and 16). This leads to a decrease in the effective value of the current through the corresponding sections and their parts to 0.71 (Fig. 13) and 0.58 (Fig. 15) relative to their current in circuits with a common output with inductive or active

and

nature of the load and the same its current.

Reducing the current of the sections improves the use of the overall power of the source of EMF variables, for example, transformer equipment, and as a result, improves its weight, weight, and cost parameters.

Claims (8)

1. Two-phase neck-to-voltage voltage converter, containing six converter elements, one of the same electrodes of which form the output terminals of one field of the p-type, and a two-phase source of EMF variables shifted along the 1 phase by 120 el. hail, relative to each other, while the source contains in each phase three sections, the first of which in the first phase forms an output terminal of a different polarity from the middle point, and this section connects to the opposite terminals of the second and third sections of the second phase, the free terminals of which, as well as the terminals of its first section, are connected by one free electrode four of the indicated conversion elements, characterized in that, in order to expand the circuit-functional possibilities and the field of application , The first section of the first phase and the second and third sections of the second connected to it, the phases are interconnected according to or oppositely; the first section of the second phase is galvanically fold 12 divided into two equal half-sections, which are connected by free terminals oppositely or according to one to two additional taps introduced one into each half-section of the first section of the first phase, the second and third sections of which are connected to one of the opposite electrodes of the other two converting elements , and other opposite conclusions are connected one by one according to and respectively opposite to two taps, entered one by one into the second and third sections or into the first and second sections. s half-section of the second phase at the respective ratios of sections and parts of the other in the first and second input sections of the phase tap to the midpoint and output to, respectively, attached to an adjacent phase section set for two subbands angle U - p; 30Q and JJ30; 60J email hail, where (O is a phase angle, and the right bracket means that the digit belonging to it belongs to this sub-band 2. A converter according to claim 2, characterized in that when the first section of the first phase is connected by terminals according to the second and third sections of the second phase, and gadflies are opposed to separate half sections of the first section of the second phase. 3. The converter according to claim 1, is that, at 30, said sections and separate half-sections are connected by counterpins, and the outlets are in agreement with each other. 4. A transducer according to claim 1, characterized in that the sec sections of the first and second phases are equal to their third sections, as well as each half section of the first section of the second phase and part of the introduced second (third) section of its section to its output connected to adjacent n phase section, installed at (D  B, 60J el. hail, in terms of cos (30 °): cos (30 °) :. : sinU, the half section of the first section of the first phase and its part from the additional tap to the midpoint - in terms of cos (): sin cp with 13 -tO 301 and sin cos (U + 30 °) at H DO, 603 el.grad, 5. Converter according to claims 1-4, characterized in that The positive (negative) outputs form one, two, three or six independent output terminals, and "in the first three alternative cases such conclusions are formed by combining respectively six or two times three or three times two conclusions. 6. The converter according to Claims 2 and 5, characterized in that, in the case of combining two times three leads, three of the same electrodes of those transforming elements, the other electrodes of which are connected to the second section of the first phase, the first separate semi-section of the second phase and third its sections and, respectively, to the third section of the first phase, the second half-section of the second phase, and its second section. 7. The converter according to claim 3, 5 and 6, characterized in that one j ten 5494714 one electrodes of those converting elements are combined, the other electrodes of which are connected to the second section of the first phase, the second half section of the second phase and the third section, respectively, to the third section of the first phase, the first half section of the second phase and its second section. 8. The converter according to claims 2, 3, 5, characterized in that in the case of thrice thru two output pins (two interconnected electrodes of the same transducer elements, the other electrodes of which are connected respectively to the second and third sections to the first phase, the second and the third section of the second phase and the first and second half sections of its first section, 9, The converter according to claims 4, 5-8, which is characterized in that the autonomous leads are interconnected in parallel through magnetically coupled or not interconnected current-separating elements. Table 1 table 2 FIG. 2 US jbfc / v ss / jf a " . x w Fig.Z a y Sf (1) M  LNO (2) t.4 " % m w & IG.6 About 10 20 SO 40 $ 0 (& 40 20 30 40 Ј0 & 3 $ & A: 4Q X % () .eight (V FI.G AND 77 Ј FIG. ft but. ("WS / G} $ № I tf / i-сГ- $ l (№ #) Л; (№№) (з / №) Г $ з3 (2 / Phage. sixteen