CN103531335A - Low-voltage lead structure of tridimensional toroidal-core transformer - Google Patents
Low-voltage lead structure of tridimensional toroidal-core transformer Download PDFInfo
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Abstract
The invention discloses a low-voltage lead structure of a tridimensional toroidal-core transformer. An initial-end lead a, an initial-end lead b and an initial-end lead c are connected with a low-voltage output terminal a1, a low-voltage output terminal b1 and a low-voltage output terminal c1 respectively through output leads, a tail-end lead x, a tail-end lead y and a tail-end lead z are connected into a y-shaped node through leads, the node is a neutral point n, and the neutral point n is connected with an output terminal 0 through an output lead; a connection busbar crosses an upper core iron yoke, extends to the side face N, and is stopped nearby the tail-end lead y of a low-voltage coil Lb, the distance between the tail-end lead y of the low-voltage coil Lb and the neutral point n is shortened, and therefore the total length of the leads of a low-voltage coil La, the total length of the leads of the low-voltage coil Lb and the total length of the leads of a low-voltage coil Lc are basically the same, and three-phase resistance is balanced. The low-voltage lead structure is simple, safe and beautiful, solves the problem that wiring is inconvenient because low-voltage terminals are not located on the same side and the problem that three-phase low-voltage resistance is unbalanced, also reduces cost of the busbar, and is very applicable to low-voltage lead structures of tridimensional toroidal-core transformers.
Description
Technical field
The present invention relates to a kind of three dimensional wound core transformer low-voltage lead structure, belong to power transformer manufacturing technology field.
Background technology
Transformer low voltage y connection is the most frequently used bind mode of distribution transformer low-pressure side.The transformer of plane formula core construction (comprising plane laminated type iron core and plane Winding iron core), mode due to three-phase low-voltage coil employing floor plan, high and low lead-in wire can thoroughly separate, and is fixed on separately on a side folder of transformer body (oil-filled transformer causes on fuel tank cover by sleeve pipe again).Three dimensional wound core transformer is due to core construction, and three-phase low-voltage coil should not adopt the mode of floor plan, must adopt " product " font arrangement according to the mode of the layout of three-phase stem, and three-phase low-voltage lead cannot be in the same side outlet.Current published scheme is (as number of patent application: 200910115511.7,200820189288.1) although solved the problem that three-phase low-voltage lead is caused to the same side, but wherein a phase terminal is long, cause three-phase resistance uneven, do not meet national standard, have to increase several fold the sectional area of this phase copper bar to reduce resistance, thereby increased widely the manufacturing cost of transformer.
Summary of the invention
The object of the invention is to: not only solve three dimensional wound core transformer low-voltage lead three-phase not in the problem of the same side, also must guarantee that, in the situation that not increasing any phase terminal cross section, three resistance unbalance rates comply with the national standard requirements.
The present invention realizes by following scheme:
A transformer low-voltage lead structure, the three-phase winding L a of this transformer, Lb, Lc are " product " font and arrange, make the exterior contour of three phase windings form three side M, N, L; The mode of connection of the low-voltage coil of described winding is " y " connection, head end lead-in wire a, the b of each phase low-voltage coil and c by output lead is connected with low pressure output wiring terminal a1, b1, c1 respectively, end leads x, y and z connect into " y " by lead-in wire and tie, node is neutral point n, and neutral point n is connected with output wiring terminal 0 by output lead; It is upper that described low pressure output wiring terminal a1, b1, c1,0 are arranged in side M, is in line; Concrete:
Head end lead-in wire c and the end leads z of the head end lead-in wire a of La low-voltage coil and end leads x, Lc low-voltage coil are arranged on side M, and head end lead-in wire b and the end leads y of Lb low-voltage coil are arranged on side N; The head end lead-in wire a of La low-voltage coil is connected to output wiring terminal a1 by output lead, the head end lead-in wire c of Lc low-voltage coil is connected to output wiring terminal c1 by output lead, and the head end lead-in wire b of Lb low-voltage coil connects output wiring terminal b1 by output lead; The end leads x, y, z of La, Lb, Lc low-voltage coil is jointly connected in parallel on and connects on busbar, forms neutral point n;
Described connection busbar is crossed upper yoke unshakable in one's determination, extend to side N, terminate near the end leads y of Lb low-voltage coil, shorten the end leads y of Lb low-voltage coil to the length of neutral point n, the total length that three-phase winding L a, Lb, Lc are gone between is separately substantially equal, three-phase resistance balance.
First section of output lead after described head end lead-in wire b is parallel with the iron yoke of side N; Extend in the top plane of iron yoke: first bend inwards 90 °, along extending perpendicular to the direction of side N, then bend 120 °, along the direction perpendicular to side M, extend; Finally extend in the M of side: 90-degree bent, along low pressure output wiring terminal setting party to being connected to output wiring terminal b1.
First section of connection busbar after described end leads y is parallel with the iron yoke of side N; Extend in the top plane of iron yoke: first bend inwards 90 °, along extending perpendicular to the direction of side N, then bend 120 °, along the direction perpendicular to side M, be connected to neutral point n.
Described end leads x is parallel with the iron yoke of side M with first section of connection busbar after z, extend in the top plane of iron yoke: first bend inwards 90 °, along the direction that is parallel to side M, extend, then 90-degree bent, along the direction perpendicular to side M, be connected to neutral point n.
The present invention is simple in structure, safe, attractive in appearance, has both solved low voltage terminal not in the problem of the same side, has solved again the problem of three-phase low-voltage resistance unbalance, has also saved the cost of busbar, is specially adapted to three dimensional wound core transformer low-voltage lead structure.
Accompanying drawing explanation
Fig. 1 is the front view of embodiment of the present invention three dimensional wound core oil-filled transformer low voltage lead structure
Fig. 2 is the vertical view of embodiment of the present invention three dimensional wound core oil-filled transformer low voltage lead structure
Fig. 3 is the front view of embodiment of the present invention three-dimensional wound core dry type transformer low voltage lead structure
Fig. 4 is the vertical view of the busbar horizontal positioned state perpendicular to the ground of embodiment of the present invention three-dimensional wound core dry type transformer low voltage lead structure
Fig. 5 is the busbar of embodiment of the present invention three-dimensional wound core dry type transformer low voltage lead structure and the vertical view of ground level laying state
Fig. 6 is the busbar of embodiment of the present invention three-dimensional wound core dry type transformer low voltage lead structure and the front view of ground level laying state
Number in the figure represents: 1-connects busbar, 2-output lead, 3-connection busbar, 4-connection busbar, 5-output lead, 6-c1 lug plate, 7-b1 lug plate, 8-a1 lug plate, 9-0 lug plate.
Embodiment
As shown in Fig. 1～6, the present invention is a kind of three dimensional wound core transformer low-voltage lead structure, and the three-phase winding L a of this transformer, Lb, Lc are " product " font and arrange, makes the exterior contour of three phase windings form three side M, N, L.The mode of connection of the low-voltage coil of winding is " y " connection, head end lead-in wire a, the b of each phase low-voltage coil, c by output lead is connected with low pressure output wiring terminal a1, b1, c1 respectively, end leads x, y, z connects into " y " by lead-in wire and ties, node is neutral point n, and neutral point n is connected with output wiring terminal 0 by output lead; It is upper that described low pressure output wiring terminal a1, b1, c1,0 are arranged in side M, is in line; Concrete:
Head end lead-in wire c and the end leads z of the head end lead-in wire a of La low-voltage coil and end leads x, Lc low-voltage coil are arranged on side M, and head end lead-in wire b and the end leads y of Lb low-voltage coil are arranged on side N.Meanwhile, lead-in wire a, c and y above three-phase low-voltage coil iron yoke, lead-in wire b, x and z below three-phase low-voltage coil iron yoke, the lead-in wire of Lb low-voltage coil and other two-phase be not at homonymy.
The head end lead-in wire a of La low-voltage coil is connected to output wiring terminal a1 by output lead, the head end lead-in wire c of Lc low-voltage coil is connected to output wiring terminal c1 by output lead, and the head end lead-in wire b of Lb low-voltage coil connects output wiring terminal b1 by output lead.Wherein:
First section of output lead after head end lead-in wire b is parallel with the iron yoke of side N; Extend in the top plane of iron yoke: first bend inwards 90 °, along extending perpendicular to the direction of side N, then bend 120 °, along the direction perpendicular to side M, extend; Finally extend in the M of side: 90-degree bent, along low pressure output wiring terminal setting party to being connected to output wiring terminal b1.
The topmost main innovation part of the present invention is: the end leads x, y, z of La, Lb, Lc low-voltage coil is jointly connected in parallel on and connects on busbar, forms neutral point n, and neutral point n connects output wiring terminal 0 by output lead.Wherein:
Connect busbar and cross upper yoke unshakable in one's determination, extend to side N, terminate near the end leads y of Lb low-voltage coil, shorten the end leads y of Lb low-voltage coil to the length of neutral point n, the total length that three-phase winding L a, Lb, Lc are gone between is separately substantially equal, three-phase resistance balance.
First section of connection busbar after end leads y is parallel with the iron yoke of side N; Extend in the top plane of iron yoke: first bend inwards 90 °, along extending perpendicular to the direction of side N, then bend 120 °, along the direction perpendicular to side M, be connected to neutral point n.
Described end leads x is parallel with the iron yoke of side M with first section of connection busbar after z, extend in the top plane of iron yoke: first bend inwards 90 °, along the direction that is parallel to side M, extend, then 90-degree bent, along the direction perpendicular to side M, be connected to neutral point n.
It should be noted that: the connection busbar after end leads x and z can be a copper bus-bar, its leading portion is divided into two parts, is connected with z with end x respectively, and back segment is connected with neutral point.The connection busbar of end x and z can be also two copper bus-bars, and its leading portion connects respectively end x and z, and upper and lower parallel staggering of back segment, end is used a copper bus-bar parallel connection.
By above-mentioned means, the present invention causes the corresponding position of homonymy of head end lead-in wire a and c by the head end lead-in wire b of three-phase low-voltage coil by connecting busbar, nearby, then logical output lead causes output wiring terminal 0 to the end leads y that the neutral point n that end leads x, y and z are linked together to formation moves to Lb low-voltage coil.The first end leads total length of La, Lb, Lc low-voltage coil is substantially equal like this, and 0 lead-in wire shares, and has guaranteed the in a basic balance of three-phase low-voltage resistance.
Connection between the lead-in wire of three-phase low-voltage coil of the present invention, connection busbar, lug plate (plate), comprises that various welding, standard component connect, riveted joint equijoin mode.The position that the present invention includes three-phase low-voltage coil is transferred respectively and forms the pin configuration that meets above-mentioned feature; The pin configuration that meets above-mentioned feature that also comprises head end lead-in wire a, b, c and end leads x, y, z to exchange respectively and form.
Above-mentioned connection busbar both can perpendicular to the groundly be placed, and also can place with ground level.
Below in conjunction with embodiment and with reference to accompanying drawing, the present invention is described in detail.
The low-voltage coil of three-phase stereo spiral iron core transformer is respectively La, Lb, Lc, and its head end lead-in wire is respectively a, b, c, and end is respectively x, y, z.Referring to Fig. 1～Fig. 2, the lead-in wire of Lb low-voltage coil and other two-phase be not at homonymy.The head end b that goes between is caused to the corresponding position of homonymy M of head end lead-in wire a and c and connect with b1 lug plate 7 by output lead 2, end leads x, z cause end leads y nearby by corresponding connection busbar 4,3 respectively simultaneously, again by end leads x, y, z corresponding connection busbar 4,1,3 be linked together and form neutral point n, so just shortened the distance of the end leads y of neutral point n to Lb low-voltage coil, then by output lead 5(low pressure zero busbar) cause 0 lug plate 9.Head end lead-in wire a is attached to corresponding a1 lug plate 8, and head end lead-in wire c is attached to corresponding c1 lug plate 6.
The joining output lead 2 of head end lead-in wire b, first section parallel with the iron yoke of its place side N, centre is curved in 90 ° again, then curves 120 °, after curved in 90 ° again, the go between iron yoke of homonymy M of a, c of its latter end and head end is parallel.
The joining connection busbar 1 of end leads y, first section is parallel with the iron yoke of its place side N, and centre is curved in 90 ° again, then curves 120 °, and its latter end is vertical with the iron yoke of the homonymy M of head end lead-in wire a, c.
The joining connection busbar 4 of end leads x and the joining connection busbar 3 of end leads z, first section is parallel with the iron yoke of its place side M, more curved in 90 °, and its latter end is vertical with the iron yoke of they lead-in wire homonymy M.
The low-voltage coil of three-phase stereo spiral iron core transformer is La, Lb, Lc, and its head end lead-in wire is respectively a, b, c, and end leads is respectively x, y, z.Referring to Fig. 3～Fig. 5, the lead-in wire of Lb high-tension coil and other two-phase be not at homonymy.The head end b that goes between is caused to the corresponding position of homonymy M of head end lead-in wire a, c and connect with b1 terminal block 7 by output lead 2, end leads x, z cause end leads y nearby by corresponding connection busbar 4,3 respectively simultaneously, again by end leads x, y, z corresponding connection busbar 4,1,3 be linked together and form neutral point n, so just shortened the distance of the end leads y of neutral point n to Lb high-tension coil.Head end lead-in wire a is attached to corresponding a1 terminal block 8, and head end lead-in wire c is attached to corresponding c1 terminal block 6.
The joining output lead 2 of head end lead-in wire b, first section parallel with the iron yoke of its place side N, centre is curved in 90 ° again, then curves 120 °, after curved in 90 ° again, the go between iron yoke of homonymy M of a, c of its latter end and head end is parallel.
The joining connection busbar 1 of end leads y, first section is parallel with the iron yoke of its place side N, and centre is curved in 90 ° again, then curves 120 °, and its latter end is vertical with the iron yoke of the homonymy M of head end lead-in wire a, c.
The joining connection busbar 4 of end leads x and the joining connection busbar 3 of end leads z, first section is parallel with the iron yoke of its place side M, more curved in 90 °, and its latter end is vertical with the iron yoke of they lead-in wire homonymy M.
By above scheme implementation, three-phase low-voltage lead all causes transformer the same side, and the first end leads total length of three-phase low-voltage lead is substantially equal, and 0 phase terminal shares, and has guaranteed that three-phase resistance is in a basic balance.
Claims (4)
1. a three dimensional wound core transformer low-voltage lead structure, the three-phase winding L a of this transformer, Lb, Lc are " product " font and arrange, make the exterior contour of three phase windings form three side M, N, L; The mode of connection of the low-voltage coil of described winding is " y " connection, head end lead-in wire a, the b of each phase low-voltage coil and c by output lead is connected with low pressure output wiring terminal a1, b1, c1 respectively, end leads x, y and z connect into " y " by lead-in wire and tie, node is neutral point n, and neutral point n is connected with output wiring terminal 0 by output lead; It is upper that described low pressure output wiring terminal a1, b1, c1,0 are arranged in side M, is in line; Concrete:
Head end lead-in wire c and the end leads z of the head end lead-in wire a of La low-voltage coil and end leads x, Lc low-voltage coil are arranged on side M, and head end lead-in wire b and the end leads y of Lb low-voltage coil are arranged on side N; The head end lead-in wire a of La low-voltage coil is connected to output wiring terminal a1 by output lead, the head end lead-in wire c of Lc low-voltage coil is connected to output wiring terminal c1 by output lead, and the head end lead-in wire b of Lb low-voltage coil connects output wiring terminal b1 by output lead; The end leads x, y, z of La, Lb, Lc low-voltage coil is jointly connected in parallel on and connects on busbar, forms neutral point n;
It is characterized in that: described connection busbar is crossed upper yoke unshakable in one's determination, extend to side N, terminate near the end leads y of Lb low-voltage coil, shorten the end leads y of Lb low-voltage coil to the length of neutral point n, the total length that three-phase winding L a, Lb, Lc are gone between is separately substantially equal, three-phase resistance balance.
2. three dimensional wound core transformer low-voltage lead structure according to claim 1, is characterized in that: first section of output lead after described head end lead-in wire b is parallel with the iron yoke of side N; Extend in the top plane of iron yoke: first bend inwards 90 °, along extending perpendicular to the direction of side N, then bend 120 °, along the direction perpendicular to side M, extend; Finally extend in the M of side: 90-degree bent, along low pressure output wiring terminal setting party to being connected to output wiring terminal b1.
3. three dimensional wound core transformer low-voltage lead structure according to claim 1, is characterized in that: first section of connection busbar after described end leads y is parallel with the iron yoke of side N; Extend in the top plane of iron yoke: first bend inwards 90 °, along extending perpendicular to the direction of side N, then bend 120 °, along the direction perpendicular to side M, be connected to neutral point n.
4. three dimensional wound core transformer low-voltage lead structure according to claim 1, it is characterized in that: described end leads x is parallel with the iron yoke of side M with first section of connection busbar after z, extend in the top plane of iron yoke: first bend inwards 90 °, along the direction that is parallel to side M, extend, then 90-degree bent, along the direction perpendicular to side M, be connected to neutral point n.
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Cited By (3)
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| CN105161261A (en) * | 2015-07-07 | 2015-12-16 | 广东广特电气有限公司 | Low-voltage Y-lead structure of three-dimensional wound core transformer |
| CN105161262A (en) * | 2015-07-07 | 2015-12-16 | 广东广特电气有限公司 | Low-voltage Y-lead structure of three-dimensional wound core transformer |
| CN106920654A (en) * | 2017-04-12 | 2017-07-04 | 江苏华辰变压器有限公司 | It is a kind of can balance resistance rate three-dimensional winding iron core pin configuration |
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| CN103117155A (en) * | 2013-03-05 | 2013-05-22 | 薛建仁 | Three-dimensional rolling iron core dry type transformer for non-magnetic clamp piece |
| CN203456252U (en) * | 2013-09-29 | 2014-02-26 | 四川风发电气科技有限公司 | Low-voltage lead structure of three-dimensional wound-core transformer |
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| US20030206087A1 (en) * | 2002-05-06 | 2003-11-06 | Square D Company | Magnetic system having three-dimensional symmetry for three phase transformers |
| US20090273431A1 (en) * | 2008-05-02 | 2009-11-05 | John Shirley Hurst | Lower cost continuous flux path transformer core and method of manufacture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105161261A (en) * | 2015-07-07 | 2015-12-16 | 广东广特电气有限公司 | Low-voltage Y-lead structure of three-dimensional wound core transformer |
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| CN106920654A (en) * | 2017-04-12 | 2017-07-04 | 江苏华辰变压器有限公司 | It is a kind of can balance resistance rate three-dimensional winding iron core pin configuration |
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Application publication date: 20140122 |