CN2341319Y - Rectifying conversion speed regulator fed by phase-shift transformer - Google Patents
Rectifying conversion speed regulator fed by phase-shift transformer Download PDFInfo
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- CN2341319Y CN2341319Y CN 98219000 CN98219000U CN2341319Y CN 2341319 Y CN2341319 Y CN 2341319Y CN 98219000 CN98219000 CN 98219000 CN 98219000 U CN98219000 U CN 98219000U CN 2341319 Y CN2341319 Y CN 2341319Y
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Abstract
The utility model relates to a rectifying frequency conversion speed regulator fed by a phase shift transformer, which is suitable for the speed regulation of a high voltage and high power motor. The utility model is characterized in that a plurality of phase shifting electric potential can be offered by a plurality of phase shifting windings of a secondary side and each phase of a transformer, and the number of element of each phase in connection power of the rectifying frequency conversion speed regulator is n. The utility model has the advantages that waveform deviation factor of voltage and current can be lowered, the pollution to an electric network by harmonic waves can be effectively eliminated, and the service life and the power factor of the electric network can be increased.
Description
A kind of rectification RHVC of phase shifting transformer power supply belongs to the high pressure electrical technology field, particularly high-tension motor frequency control field.
As everyone knows, the alternating current motor rotating speed is relevant with the power supply frequency, so variable-frequency control technique has been widely used in controlling all many-sides such as manufacturing machine rotating speed.As shown in Figure 1, between power supply and alternating current motor M, install RHVC SF additional and can realize adjustment alternating current motor M rotating speed.
The objective of the invention is to adopt a kind of novel phase shift transformer, be the power supply of rectification RHVC,, reduce harmonic pollution, improve power factor and motor useful life to overcome above-mentioned defective.
The technical solution of the utility model is:
The rectification RHVC of a kind of phase shifting transformer power supply comprises that phase shifting transformer B, former limit winding Q, T unshakable in one's determination, variable-frequency governor SF, high voltage motor M, variable-frequency governor SF are every to be connected in series n power cell mutually that three-phase is connected to 3 altogether
nIndividual power cell: A
1-A
n, B
1-B
n, C
1-C
n, it is characterized in that: for producing every middle mutually certain phase shifting angle a of mutual deviation
nMany groups of balanced phase shift electromotive force, pay that the limit winding is every forms f by n
A1-f
An, f
B1-f
Bn, f
C1-f
Cn, every mutually every group is provided with 3 identical in structure independent winding f again
1A, f
1A', f
1A" f
NA, f
NA', f
NA", f
1B, f
1B', f
1B" f
NB, f
NB', f
NB", f
1C, f
1C', f
1C" f
NC, f
NC', f
NC" it is, every that to pay limit winding group number mutually be 3
n, three phase windings add up to 3 times 3
nf
1A, f
1B, f
1C-f
NA", f
NB", f
NC", the line voltage of each winding is known and equal, and phase shifting transformer is paid the several on the same group mutually corresponding winding f of every phase on limit
IA, f
IB, f
ICOr f
IA', f
IB', f
IC' or f
IA", f
IB", f
IC" be connected into three phase windings of a triangle or triangle extension star, per three identical windings are one group.Three-phase adds up to 3 times 3
nIndividual pair of limit winding is connected into 3
nIndividual three phase windings, each three phase winding go out the power cell A that three terminals are connected to variable-frequency governor SF
iOr B
iOr C
iOn, three independent winding that three-phase is counted mutually on the same group are connected into three three phase winding f
Ai, f
Bi, f
Ci, f
Ai', f
Bi', f
Ci', f
Ai", f
Bi", f
Ci" be connected respectively to one group of three three-phase converter module A of variable-frequency governor SF
i, B
i, C
iOn, promptly phase shifting transformer adds up to 3 times 3
nIndividual three-phase is paid the three-phase 3 that the limit winding is connected respectively to variable-frequency governor SF
nOn the individual power cell; The output terminals A of variable-frequency governor SF, B, C are connected to input D, E, the F of high voltage motor M.
Phase shifting transformer B pays the every phase winding group in limit, and to count n identical with the every phase power cell of variable-frequency governor SF number, three phase windings that the winding that every mutually every group is provided with three identical every group of correspondences of independent winding three-phase connects into triangle or triangle extension star are connected to respectively on the power cell of variable-frequency governor three-phase, the line voltage of each three phase winding equates, the electromotive force vectogram of each three phase winding is congruent electromotive force triangle, the number of turn of each winding, around to, centre tap position and the mode of connection by electromotive force phase shifting angle a
nSize and positive and negative decision, phase shifting angle a
nCount the ratio of n for 60 ° of power cells that whenever are in series with SF of optimal open angle of variable-frequency governor SF.
It can be 3,4,5,6 that the group that phase shifting transformer B pays limit phase shift winding is counted n, every phase electromotive force phase shifting angle a
nIt can be 20 °, 15 °, 12 °, 10 °.
Phase voltage, coil connection, centre tap position, the number of turn, the leading-out terminal of n group phase shift winding can be found the solution known conditions by each winding three-phase electromotive force vectogram or analytic method: pay limit winding group and count n, phase shifting angle a
nSize and positive and negative, the line voltage of each three phase winding equates and is determined by known load voltage, phase sequence is set and to be clockwise direction, and forward phase shift winding and 0 ° of winding be around to identical with the electromotive force vector direction, reverse phase shift winding and 0 ° of winding around to opposite with the electromotive force vector direction.The drafting principle of electromotive force vectogram: the electric potential direction of (1) every phase winding: winding around opposite in the opposite direction, is represented direction with vector arrow around identical to identical direction; (2) electromotive force size: represent that by the vector length that scale is identical the leg-of-mutton length of side of each electromotive force vectogram is represented the line voltage of this triphasic potential, pay the leg-of-mutton length of side of limit n group electromotive force and all equate; (3) phase shifting angle a
nPositive and negative: with 0 ° of vector is benchmark, the phase shifting angle a that turns to clockwise
nFor just, it is negative turning to phase shifting angle counterclockwise; (4) the leg-of-mutton direction of triphasic potential is all by the clockwise direction of a, b, c order, and promptly phase sequence is for just; (5) phase shifting angle a during n=5
nBy 0 °, ± 12 °, ± 24 ° of drawing that are as the criterion.
When phase shifting transformer B pays limit one phase shift phase winding n=5, triphasic potential phase shifting angle a
nBe 0 °, ± 12 °, ± the line voltage of 24 ° of each three phase windings is known and equate to be 380V, coil bears voltage 10V/ circle;
Three identical independent winding f of (1) 0 ° of winding
1A, f
1B, f
1C-f
1A", f
1B", f
1C" triangularity connection separately is by leading-out terminal a
0, b
0, c
0Be connected to variable-frequency governor SF power cell A
1, B
1, C
1, the triphasic potential vectogram is with a
3a
0Be as the criterion and be equilateral triangle △ a
0b
0c
0, line voltage c
0a
0Equal phase voltage a
3a
0Be 380V, three phase winding a
3a
0, b
3a
0, c
3c
0End to end, three winding number of turns are identical respectively to be 38 circles.
(2)+12 three identical independent winding f of ° winding
2A, f
2B, f
2C-f
2A", f
2B", f
2C" triangularity extension star connection also is head end a by leading-out terminal simultaneously separately
+ 12, b
+ 12, c
+ 12Be connected to variable-frequency governor SF power cell A
2, B
2, C
2, triangle extension star connection derives from △ a
0b
0c
0After rotating 12 °, each limit clockwise direction forms new △ a
+ 12b
+ 12c
+ 12, cross summit a respectively
+ 12, b
+ 12, make △ a
0b
0c
0Parallel lines can get three groups of intersection point a
2b
3, b
2c
3, c
2a
3, a
3, b
3, c
3Be respectively+tail end of 12 ° of winding a, b, c three phase windings, length is the phase voltage of each phase winding between its head and the tail, a
2, b
2, c
2Be respectively the tapping point of each phase winding, the line segment of cutting apart represents that respectively triangle meets the winding voltage value that connects part with extension star, winding number of turns W
A+12a2=W
B+12b2=W
C+12c2=9 circles, W
A2a3=W
B2b3=W
C2c3=24 circles;
(3)-12 three identical winding f of ° winding
4A, f
4B, f
4C-f
4A", f
4B", f
4C" respectively have reverse triangle extension star connection of one's own, by leading-out terminal a
-12, b
-12, c
-12Be connected to variable-frequency governor power cell A
4, B
4, C
4Oppositely triangle extension star connects winding and derives from △ a
0b
0c
0Each limit counterclockwise rotates the new △ a of 12 ° of formation
-12b
-12c
-12And former △ a
0b
0c
0A
3Point is a
-12Point is decided b by clockwise phase sequence
-12, c
-122 points are crossed summit a respectively
-12, b
-12Make △ a
0b
0c
0Parallel lines get three groups of intersection point a
3b
2, b
3c
2, c
3a
2, a
2, b
2, c
2Be coil tap point, coil turn W
A-12a2=W
B-12b2=W
C-12c2=9 circles, W
A2a3=W
B2b3=W
C2c3=24 circles;
(4)+24 three identical winding f of ° winding
3A, f
3B, f
3C-f
3A", f
3B", f
3C" triangularity extension star connection separately is by leading-out terminal a
+ 24, b
+ 24, c
+ 24Be connected to variable-frequency governor SF power cell A
3, B
3, C
3, triangle extension star connection is with+12 ° of windings, and just the anglec of rotation is 24 °, and getting three groups of intersection points after the rotation is a
2b
3, b
2c
3, c
2a
3, a
2, b
2, c
2Be coil tap point, coil turn W
A+24a2=W
B+24b2=W
C+24c2=16 circles, W
A2a3=W
B2b3=W
C2c3=8 circles.
(5)-24 three identical winding f of ° winding
5A, f
5B, f
5C-f
5A", f
5B", f
5C" respectively have reverse triangle extension star connection of one's own by leading-out terminal a
-24, b
-24, c
-24Be connected to variable-frequency governor SF power cell A
5, B
5, C
5Oppositely triangle extension star connects the winding source with-12 ° of windings, and just the anglec of rotation is 24 °, gets three groups of intersection point: a after rotate 24 °
3b
2, b
3c
2, c
3a
2, a
2, b
2, c
2Be coil tap point, coil turn W
A-24a2=W
B-24b2=W
C-24c2=16 circles, W
A2a3=W
B2b3=W
C2c3=8 circles.
Below in conjunction with accompanying drawing the utility model is illustrated:
The rectification RHVC of accompanying drawing 1 conventional transformer power supply
The rectification RHVC schematic diagram of accompanying drawing 2 phase shifting transformers power supply
The rectification RHVC electrical principle schematic diagram of phase shifting transformer power supply during accompanying drawing 3n=5
The rectification RHVC electrical principle winding diagram of phase shifting transformer power supply during accompanying drawing 4n=5
Phase shifting transformer is paid limit 0 ° of winding three-phase electromotive force vectogram during accompanying drawing 5n=5
Phase shifting transformer is paid limit+12 ° winding three-phase electromotive force vectogram during accompanying drawing 6n=5
Phase shifting transformer is paid limit-12 ° winding three-phase electromotive force vectogram during accompanying drawing 7n=5
Phase shifting transformer is paid limit+24 ° winding three-phase electromotive force vectogram during accompanying drawing 8n=5
Phase shifting transformer is paid limit-24 ° winding three-phase electromotive force vectogram during accompanying drawing 9n=5
Phase shifting transformer is paid limit winding one one group of line voltage oscillogram mutually during accompanying drawing 10n=5
The rectification RHVC electric hookup of phase shifting transformer power supply during accompanying drawing 11n=5
The utility model operation principle is as follows:
As previously mentioned, the rectification frequency conversion speed-adjusting system of conventional three-phase transformer power supply, transformer is paid the limit and is had only one group of three phase winding, hand over, straight, alternation comprises a large amount of harmonic wave compositions in the speed regulation process frequently, cause serious wave distortion, this mode of speed regulation reduces the power factor of electrical network to electrical network, motor is all produced very big harmonic pollution.
In the high voltage and high power electromotor governing system, electrical network harmonic wave free frequency-conversion device also adopts friendship, straight, the frequency converter of handing over formula, difference is that every the need mutually of the output of variable-frequency governor formed by several power unit cascades, referring to accompanying drawing 2 in order to obtain the high voltage of the required certain numerical value of high-tension motor.In order to obtain the line voltage of 3KV, its variable-frequency governor SF is every by 5 power cell A
1-A
5, B
1-B
5, C
1-C
5Serial connection forms.Referring to accompanying drawing 3, the voltage of each power cell is 380V, 5 power cell serial connections, and every phase output point A, B, C, voltage to neutral is 1900V, forms the phase voltage of 3KV motor, is the power supply of 3KV motor.
Produce the harmonic wave that pollutes electrical network in the conversion process for effectively eliminating, require the balanced phase shift of power supply, see accompanying drawing 2-4, every phase winding group number of balanced phase shift is counted n with the power cell that the rectification frequency converter whenever is in series and is equated, promptly phase shifting transformer B pays every the need mutually of limit winding and be made up of n.Variable-frequency governor SF is every as shown in Figure 3 forms A by 5 power cell serial connections
1-A
5, B
1-B
5, C
1-C
5, then phase shifting transformer B pays that the limit is every need 5 groups of windings mutually, and every group is connected into identical 3 three phase windings by 3 identical but separate windings again, as f
1A, f
1B, f
1C-f
1A＂, f
1B＂, f
1C＂ is to power cell A
1, B
1, C
1Power supply is shown in accompanying drawing 2,3, so the every phase winding of transformer adds up to 3
nPhase shifting transformer E pays the balanced phase shifting angle a of the every group of winding in limit
n, count the ratio of n for 60 ° of optimal open angles and the every power unit cascade mutually of frequency converter.For adapting to the actual needs of different loads and voltage, the variable-frequency governor SF power cell that whenever is in series is counted n and be can be 3,4,5,6, the phase shifting angle that phase shifting transformer B pays the limit winding can be 20 °, 15 °, 12 °, 10 ° respectively, pay the phase shift of limit winding, by the centre tap of paying the limit winding, around realizing to, mode of connection difference.
Embodiment is an example with the rectification RHVC of the phase shifting transformer of n=5 power supply, and the phase shifting transformer β of this device is required to be known 3KV motor power supply, and every phase voltage is 1900V, and variable-frequency governor SF is every to have 5 power cell A mutually
1-A
5, B
1-B
5, C
1-C
5, the voltage of each power cell is 380V, requiring phase shifting transformer to pay the limit line voltage that every mutually every group provides is 380V, phase shifting angle a
n Be 12 °, five groups of phase shift windings be 0 ° of winding, ± 12 ° of windings and ± the 24V winding.30 ° of windings are to power cell A
1B
1C
1Power supply is by A, B, three three identical winding f of C
1A, f
1B, f
1C-f
1A＂, f
1B＂, f
1C＂ is connected into, and each winding is the order delta connection.3+12 ° windings are to power cell A
2, B
2, C
2Power supply is by three identical winding f of A, B, C three-phase
2A, f
2B, f
2C-f
2A＂, f
2B＂, f
2C＂ connects into triangle extension star connection separately, and every group of outlet end of the same name is identical with 0 ° of winding.3-12 ° of windings are to bearing power unit A
4, B
4, C
4Power supply is by three identical winding f
4A, f
4B, f
4C-f
4A＂, f
4B＂, f
4C＂ connects into reverse triangle extension star connection separately, and every group of end of the same name is opposite with 0 ° of winding.3+24 ° windings are to bearing power unit A
3, B
3, C
3Power supply, connection, around to+12 ° of windings changes but the coil tap position change is the number of turn.3-24 ° of windings are to power cell A
5, B
5, C
5Power supply, connection be around to-12 ° of windings, coil tap position difference.Because each winding wire voltage is identical, so a
nThe total number of turns and the tapping point of the identical positive and negative winding of size are identical, around to difference.
Paying the concrete parameter of limit winding coil such as the number of turns, centre tap point etc. for the phase shifting transformer that obtains having 5 groups of phase shift electromotive forces can make and respectively organize winding three-phase electromotive force vectogram by doing the figure method, determines the magnitude of voltage size and the tap position of each phase shift winding; Calculate by general transformer, can determine respectively to organize the number of turn, tapping point, wiring relation and the outlet of winding.
Be example below with n=5, make 5 groups of winding three-phase electromotive force vectograms, determine electromotive force phase shifting angle a from 5 electromotive force triangles by doing the figure method
nBe 0 °, ± 12 °, each winding phase voltage value in the time of ± 24 °, and then bear 10V voltage from the every circle of known coil and determine to organize the number of turn of winding, tapping point, wiring relation and outlet.
Since n=5, the triphasic potential phase shifting angle a of pair limit winding
nBe 0 °, ± 12 ° and ± 24 °, the line voltage of each three phase winding is known and equal, is 380V, and phase sequence is clockwise direction, and forward phase shift winding and 0 ° of winding are around to identical, and the electromotive force vector direction is identical; Oppositely phase shift winding and 0 ° of winding are around to opposite, and the electromotive force vector direction is opposite.Known conditions can be drawn and pay limit phase shift winding electromotive force vectogram thus, its drafting principle is as follows: the electromotive force winding of (1) every phase winding is around identical to identical direction, around opposite in the opposite direction, represent direction with vector arrow, (2) the electromotive force size is represented by the identical vector length of scale, the leg-of-mutton length of side of each electromotive force vectogram is represented the line voltage of this triphasic potential, paying the 5 groups of leg-of-mutton length of sides of triphasic potential in limit all equates, (3) the positive and negative of phase shifting angle is benchmark 6 with 0 ° of vector, the phase shifting angle a that turns to clockwise
nFor just, it is negative turning to phase shifting angle counterclockwise, (4) the leg-of-mutton direction of triphasic potential is all by a, b, c clockwise direction in proper order, (5) pay the limit winding because be, potential A, B, C three-phase represent with lowercase a, b, c respectively, subscript 0 ,+12 ,-12 ,+24 ,-24 represent respectively 0 ° ,+12 ° ,-12 ° ,+24 ° ,-24 ° windings.See accompanying drawing 3-9, three triphasic potential vectograms of 0 ° of winding are equilateral triangle △ a
0b
0c
0, line voltage c
0a
0Equal phase voltage a
3a
0Be 380V, with c
0a
0Be as the criterion, press a, b, the placement clockwise of c order, a phase winding head end label is a
0, tail end is a
3, b, c phase winding two ends label is respectively b
0, b
3, c
0, c
3The electromotive force vectogram of 0 ° of winding is seen accompanying drawing 5, a
0With b
3, b
0With c
3, c
0With a
3, the end to end and a of difference
0, b
0, c
0The leading-out terminal of three phase windings for this reason, phase shifting angle is 0 °, vectorial a
3a
0Electromotive force vector for 0 ° of winding of a phase.
± 12 °, ± 24 ° of phase shift winding electromotive force vectograms are referring to accompanying drawing 6-9, and its winding head end label is respectively a
+ 12, b
+ 12, c
+ 12, a
-12, b
-12, c
-12, a
-24, b
+ 24, c
+ 24, a
-24, b
-24, c
-24A phase winding tail end label is a
3, b, c phase winding tail end label are respectively b
3, c
3, tapped label is a
2, b
2, c
2
Be determining the phase voltage size of each phase winding, is example with phase shifting angle for+12 ° winding, makes its electromotive force triangle as follows: △ a
0b
0c
0After rotating 12 °, each limit clockwise direction forms new △ a
+ 12b
+ 12c
+ 12, cross summit a respectively
+ 12, b
+ 12, make △ a
0b
0c
0Parallel lines can get three groups of intersection point a
2b
3, b
2c
3, c
2a
3, a
3, b
3, c
3Be respectively+tail end of 12 ° of winding a, b, c three phase windings, length is the phase voltage of each phase winding between its head and the tail, a
2, b
2, c
2Be respectively the tapping point of each phase winding, the line segment of cutting apart represents that respectively triangle meets the winding voltage value that connects part with extension star, winding number of turns W
A+12a2=W
B+12b2=W
C+12c2=9 circles, W
A2a3=W
B2b3=W
C2c3=24 circles or do vector
With
Parallel, the coiling direction of expression forward phase shift winding is identical with 0 ° of winding.With a
12Point is for the summit, with a
3a
+ 12Be the limit, make 12 ° of lines in the direction of the clock, on this line segment, intercept a
+ 12c
+ 12With 0 ° of winding triangle △ a
0b
0c
0Length of side a
3a
0Equate, represent that its magnitude of voltage is also for 380V, with a
+ 12, c
+ 122 are as the criterion, and are equilateral triangle a by a, b, c order for clockwise direction
+ 12b
+ 12c
+ 12, the method is identical with 0 ° of electromotive force triangle way.With c
+ 12Be the summit, c
+ 12b
+ 12For counterclockwise making 12 ° of lines on one side, be the c phase winding, this electromotive force vector and a
+ 12a
3Intersect at a
3The point.With b
+ 12Be the summit, b
+ 12a
+ 12For counterclockwise making 12 ° of lines on one side, these 12 ° of lines intersect at a respectively
3c
2Point, c
3b
2Point, b
3a
2Point forms phase shifting angle a
nFor the three-phase winding electromotive force vectogram that+12 ° positive triangle extension stars connect is seen accompanying drawing 6,
Vector is
Clockwise 12 ° of phase shifts of vector, promptly+12 °, a
+ 12, b
+ 12, c
+ 12Be respectively+head end of 12 ° of windings a
3, b
3, c
3Be respectively+tail end of 12 ° of winding a, b, c three phase windings, length is represented the phase voltage of each phase winding, a between head and the tail
2, b
2, c
2Be respectively the tapping point of each phase winding, the line segment of cutting apart represents that respectively triangle connects part and extension star meets winding voltage value partly, a
2a
3For triangle meets part phase voltage size, a
+ 12a
2For star connects the part phase voltage, three-phase is identical.Directly obtain+size and the tap position of 12 ° of phase shift winding phase voltages with graphing method like this, the winding coil number of turn that tap position is identical is identical, with analytic solution △ a
+ 12c
+ 12a
3Also can obtain identical result.
+ 24 ° ,-12 ° ,-24 ° winding electromotive force vectogram practices are same as described above, except that+24 ° of phase shifting angle rotation number of degrees increase,-12 ° ,-24 ° phase shift electromotive force vectogram practice differences are: (1) a phase electromotive force and reference vector are that 0 ° electromotive force differs 180 °, the back-roll of expression winding, (2) phase shifting angle is an example with a phase electromotive force, be rotated counterclockwise 12 ° and 24 °, (3) wiring difference, the tap a of the winding a phase of forward phase shift
2Point and b phase winding tail end b
3Point links to each other, and is followed successively by b
2c
3, c
2a
3, the tap a of the winding a phase of reverse phase shift
2Point and c phase winding tail end c
3Link to each other, be followed successively by b
2a
3, c
2b
3Other number of turn tap positions etc. are all identical with forward phase shift winding.
Accompanying drawing 11 for a mutually one group of n=5 be that example is paid limit winding connection figure, three-phase is identical, for clear, accompanying drawing 3 no longer with the power cell line, only the head and the tail numbering is labeled on the figure with end of the same name.In conjunction with referring to accompanying drawing 5-10,0 ° of three-phase winding wire voltage equates with phase voltage to be 380V that establish winding conducting wire 100V/ circle, 0 ° of winding is 38 circles, so W
A0a3=W
B0b3=W
C0c3=38 circles, leading-out terminal are a
0, b
0, c
0, be connected to variable-frequency governor SF three-phase converter module A
1, B
1, C
1+ 12 ° of three phase winding triangle connects the part phase voltage and known by mapping and be 240V, coil turn W
A2a3-W
B2b3=W
C2c3=24 circles; Star meets part a
+ 12a
2Phase voltage is 90V, W
A+12a
2=9 circles, same W
B+12b
2=W
+ c12c2=9 circles, leading-out terminal are a
+ 12, b
+ 12, c
+ 12Be connected to power cell A
2, B
2, C
2-12 ° of three-phase winding coil numbers of turn are identical with+12 °, and leading-out terminal is a
-12, b
-12, c
-12, be connected to power cell A
4, B
4, C
4+ 24 ° of three phase winding triangle connects the part phase voltage to be known by mapping and is 80V, so W
A2a3=W
B2b3=W
C2c3It is 160V that=8 circles, star connect the part phase voltage, W
A+24a2=W
B24b2=W
C+24b2=W
C+24c2=16 circles, leading-out terminal are a
+ 24, b
+ 24, c
+ 24, be connected to power cell A
3, B
3, C
3-24 ° of three-phase winding coil numbers of turn are identical with+24 °, and leading-out terminal is a
-24, b
-24, c
-24Be connected to power cell A
5, B
5, C
5
Phase shifting transformer was paid limit winding one one group of f mutually when accompanying drawing 10 was n=5
1A-f
5APotential waveform figure, two groups of waveforms are identical therewith in addition.With accompanying drawing 5-9 contrast, waveform 1 is an electromotive force
Oscillogram, be defined as 0 °, waveform 2 is an electromotive force
Oscillogram, phase shift+12 °, waveform 3 is an electromotive force
Oscillogram, phase shift+24 °, waveform 4 is an electromotive force
Oscillogram, phase shift-12 °, waveform 5 is an electromotive force
Oscillogram, phase shift-24 °, the two-phase potential waveform differs 120 ° respectively in addition.
The utility model is for the demand of the threephase load of satisfying a plurality of power cells that whenever are in series, phase shifting transformer pay the every phase coiling in limit organize more, every group comprise 3 same coils, reach the every purposes that many group outputs are arranged mutually of phase shifting transformer.
Fact proved that adopting the utility model is the device of variable-frequency governor power supply, its electric current.The irregularity of wave form of voltage＜4% (national standard 5%), power factor of electric network＞0.95 effectively reduces the harmonic pollution of electrical network, has not only reduced the infringement of harmonic wave to the high-tension motor insulation, energy-conservation economize on electricity, and guaranteed the safe operation of electrical network.
Claims (5)
1, a kind of rectification RHVC of phase shifting transformer power supply, comprising that phase shifting transformer (B), former limit winding (Q), (T), variable-frequency governor (SF) unshakable in one's determination, high voltage motor (M), variable-frequency governor (SF) are every is connected in series n power cell mutually, and three-phase is connected to 3n power cell: A altogether
1-A
n, B
1-B
n, C
1-C
n, it is characterized in that: for producing every middle mutually certain phase shifting angle a of mutual deviation
nMany groups of balanced phase shift electromotive force, pay that the limit winding is every forms f by n
A1-f
An, f
B1-f
Bn, f
C1-f
Cn, every mutually every group is provided with 3 identical in structure independent winding f again
1A, f
1A', f
1A" f
NA, f
NA', f
NA", f
1B, f
1B', f
1B" f
NB, f
NB', f
NB", f
1C, f
1C', f
1C" f
NC, f
NC', f
NC" it is, every that to pay limit winding group number mutually be 3
n, three phase windings add up to 3 times 3
nf
1A, f
1B, f
1C-f
NA", f
NB", f
NC", the line voltage of each winding is known and equal, and phase shifting transformer is paid the several on the same group mutually corresponding winding f of every phase on limit
IA, f
IB, f
ICOr f
IA', f
IB', f
IC' or f
IA", f
IB", f
IC" be connected into three phase windings of a triangle or triangle extension star, per three identical windings are one group.Three-phase adds up to 3 times 3
nIndividual pair of limit winding is connected into 3
nIndividual three phase windings, each three phase winding go out the power cell A that three terminals are connected to variable-frequency governor (SF)
iOr B
iOr C
iOn, three independent winding that three-phase is counted mutually on the same group are connected into three three phase winding f
Ai, f
Bi, f
Ci, f
Ai', f
Bi', f
Ci', f
Ai", f
Bi", f
Ci" be connected respectively to one group of three three-phase converter module A of variable-frequency governor SF
i, B
i, C
iOn, promptly phase shifting transformer adds up to 3 times 3
nIndividual three-phase is paid the three-phase 3 that the limit winding is connected respectively to variable-frequency governor (SF)
nOn the individual power cell; Output terminals A, B, the C of variable-frequency governor (SF) is connected to input D, E, the F of high voltage motor (M).
2, RHVC as claimed in claim 1, it is characterized in that: it is identical with the every phase power cell of variable-frequency governor (SF) number that phase shifting transformer (B) pair every phase winding group in limit is counted n, three phase windings that the winding that every mutually every group is provided with three identical every group of correspondences of independent winding three-phase connects into triangle or triangle extension star are connected to respectively on the power cell of variable-frequency governor three-phase, the line voltage of each three phase winding equates, the electromotive force vectogram of each three phase winding is congruent electromotive force triangle, the number of turn of each winding, around to, the centre tap position and the mode of connection are by electromotive force phase shifting angle a
nSize and positive and negative decision, phase shifting angle a
nCount the ratio of n for 60 ° of power cells that whenever are in series with SF of optimal open angle of variable-frequency governor SF.
3, RHVC as claimed in claim 2, it is characterized in that paying the group of limit phase shift winding by phase shifting transformer (E), to count n can be 3,4,5,6, every phase electromotive force phase shifting angle a
nIt can be 20 °, 15 °, 12 °, 10 °.
4, RHVC as claimed in claim 2, the phase voltage, coil connection, centre tap position, the number of turn, the leading-out terminal that it is characterized in that n group phase shift winding can be found the solution by each winding three-phase electromotive force vectogram or analytic method, known conditions: pay limit winding group and count n, phase shifting angle a
nSize and positive and negative, the line voltage of each three phase winding equates and is determined by known load voltage, phase sequence is set and to be clockwise direction, and forward phase shift winding and 0 ° of winding be around to identical with the electromotive force vector direction, reverse phase shift winding and 0 ° of winding around to opposite with the electromotive force vector direction.The drafting principle of electromotive force vectogram: the electric potential direction of (1) every phase winding: winding around opposite in the opposite direction, is represented direction with vector arrow around identical to identical direction; (2) electromotive force size: represent that by the vector length that scale is identical the leg-of-mutton length of side of each electromotive force vectogram is represented the line voltage of this triphasic potential, pay the leg-of-mutton length of side of limit n group electromotive force and all equate; (3) phase shifting angle a
nPositive and negative: with 0 ° of vector is benchmark, the phase shifting angle a that turns to clockwise
nFor just, it is negative turning to phase shifting angle counterclockwise; (4) the leg-of-mutton direction of triphasic potential is all by the clockwise direction of a, b, c order, and promptly phase sequence is for just; (5) phase shifting angle a during n=5
nConnect 0 °, ± 12 °, ± 24 ° of drawing that are as the criterion.
5, it is characterized in that as the described RHVC of claim 1-4: when phase shifting transformer (B) is paid limit one phase shift phase winding n=5, triphasic potential phase shifting angle a
nBe 0 °, ± 12 °, ± 24 °, the line voltage of each three phase winding is known and equate to be 380V, coil bears voltage 10V/ circle;
Three identical independent winding f of (1) 0 ° of winding
1A, f
1B, f
1C-f
1A", f
1B", f
1C" triangularity connection separately is by leading-out terminal a
0, b
0, c
0Be connected to variable-frequency governor (SF) power cell A
1, B
1, C
1, the triphasic potential vectogram is with a
3a
0Be as the criterion and be equilateral triangle △ a
0b
0c
0, line voltage c
0a
0Equal phase voltage a
3a
0Be 380V, three phase winding a
3a
0, b
3b
0, c
3c
0End to end, three winding number of turns are identical respectively to be 38 circles.
(2)+12 three identical independent winding f of ° winding
2A, f
2B, f
2C-f
2A", f
2B", f
2C" triangularity extension star connection also is head end a by leading-out terminal simultaneously separately
+ 12, b
+ 12, c
+ 12Be connected to variable-frequency governor (SF) power cell A
2, B
2, C
2, triangle extension star connection derives from △ a
0b
0c
0After rotating 12 °, each limit clockwise direction forms new △ a
+ 12b
+ 12c
+ 12, cross summit a respectively
+ 12, b
+ 12, make △ a
0b
0c
0Parallel lines can get three groups of intersection point a
2b
3, b
2c
3, c
2a
3, a
3, b
3, c
3Be respectively+tail end of 12 ° of winding a, b, c three phase windings, length is the phase voltage of each phase winding between its head and the tail, a
2, b
2, c
2Be respectively the tapping point of each phase winding, the line segment of cutting apart represents that respectively triangle meets the winding voltage value that connects part with extension star, winding number of turns W
A+12a2=W
B+12b2=W
C+12c2=9 circles, W
A2a3=W
B2b3=W
C2c3=24 circles;
(3)-12 three identical winding f of ° winding
4A, f
4B, f
4C-f
4A", f
4B", f
4C" respectively have reverse triangle extension star connection of one's own, by leading-out terminal a
-12, b
-12, c
-12Be connected to variable-frequency governor power cell A
4, B
4, C
4Oppositely triangle extension star connects winding and derives from △ a
0b
0c
0Each limit counterclockwise rotates the new △ a of 12 ° of formation
-12b
-12c
-12And former △ a
0b
0c
0A
3Point is a
-12Point is decided b by clockwise phase sequence
-12, c
-122 points are crossed summit a respectively
-12, b
-12Make △ a
0b
0c
0Parallel lines get three groups of intersection point a
3b
2, b
3c
2, c
3a
2, a
2, b
2, c
2Be coil tap point, coil turn W
A-12a2=W
B-12b2=W
C-12c2=9 circles, W
A2a3=W
B2b3=W
C2c3=24 circles;
(4)+24 three identical winding f of ° winding
3A, f
3B, f
3C-f
3A", f
3B", f
3C" triangularity extension star connection separately is by leading-out terminal a
+ 24, b
+ 24, c
+ 24Be connected to variable-frequency governor (SF) power cell A
3, B
3, C
3, triangle extension star connection is with+12 ° of windings, and just the anglec of rotation is 24 °, and getting three groups of intersection points after the rotation is a
2b
3, b
2c
3, c
2a
3, a
2, b
2, c
2Be coil tap point, coil turn W
A+24a2=W
B+24b2=W
C+24c2=16 circles, W
A2a3=W
B2b3=W
C2c3=8 circles.
(5)-24 three identical winding f of ° winding
5A, f
5B, f
5C-f
5A", f
5B", f
5C" respectively have reverse triangle extension star connection of one's own by leading-out terminal a
-24, b
-24, c
-24Be connected to variable-frequency governor SF power cell A
5, B
5, C
5Oppositely triangle extension star connects the winding source with-12 ° of windings, and just the anglec of rotation is 24 °, gets three groups of intersection point: a after rotate 24 °
3b
2, b
3c
2, c
3a
2, a
2, b
2, c
2Be coil tap point, coil turn W
A-24a2=W
B-24b2=W
C-24c2=16 circles, W
A2a3=W
B2b3=W
C2c3=8 circles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98219000 CN2341319Y (en) | 1998-09-09 | 1998-09-09 | Rectifying conversion speed regulator fed by phase-shift transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98219000 CN2341319Y (en) | 1998-09-09 | 1998-09-09 | Rectifying conversion speed regulator fed by phase-shift transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2341319Y true CN2341319Y (en) | 1999-09-29 |
Family
ID=33971207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98219000 Expired - Fee Related CN2341319Y (en) | 1998-09-09 | 1998-09-09 | Rectifying conversion speed regulator fed by phase-shift transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2341319Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385782C (en) * | 2000-12-27 | 2008-04-30 | 艾默生网络能源有限公司 | Multiple-level serially connected high-voltage inverter |
| CN101882906A (en) * | 2009-12-30 | 2010-11-10 | 王振民 | Novel power circuit of high-voltage SRD (Step Recovery Diode) |
| CN101924508A (en) * | 2010-08-20 | 2010-12-22 | 上海交通大学 | Variable-frequency speed regulating system for starting high-power pumped storage unit |
| CN101499757B (en) * | 2008-02-02 | 2011-05-18 | 北京中纺锐力机电有限公司 | Novel speed regulating apparatus for 3 phase high voltage switch reluctance motor |
| CN103199775A (en) * | 2013-03-26 | 2013-07-10 | 上海交通大学 | Five level single round high-power anti-explosion synchronous motor frequency conversion speed regulation system based on integrated gate commutated thyristor (IGCT) |
-
1998
- 1998-09-09 CN CN 98219000 patent/CN2341319Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385782C (en) * | 2000-12-27 | 2008-04-30 | 艾默生网络能源有限公司 | Multiple-level serially connected high-voltage inverter |
| CN101499757B (en) * | 2008-02-02 | 2011-05-18 | 北京中纺锐力机电有限公司 | Novel speed regulating apparatus for 3 phase high voltage switch reluctance motor |
| CN101882906A (en) * | 2009-12-30 | 2010-11-10 | 王振民 | Novel power circuit of high-voltage SRD (Step Recovery Diode) |
| CN101924508A (en) * | 2010-08-20 | 2010-12-22 | 上海交通大学 | Variable-frequency speed regulating system for starting high-power pumped storage unit |
| CN103199775A (en) * | 2013-03-26 | 2013-07-10 | 上海交通大学 | Five level single round high-power anti-explosion synchronous motor frequency conversion speed regulation system based on integrated gate commutated thyristor (IGCT) |
| CN103199775B (en) * | 2013-03-26 | 2016-05-04 | 上海交通大学 | Simplex winding high-power explosion-proof synchronous motor frequency conversion speed-adjusting system based on IGCT five level |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |