Winding structure of single-phase traction transformer
A technology for traction transformers and winding structures, applied in the direction of transformers, transformers/inductor coils/windings/connections, fixed transformers, etc., can solve the problem of small impedance requirements, achieve the effect of ensuring impedance requirements, reasonable design, and meeting use requirements
Active Publication Date: 2010-09-08
WOLONG ELECTRIC YINCHUAN TRANSFORMER
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Problems solved by technology
[0002] Due to the very small impedance requirements of single-phase traction transformers for AT power supply, the single winding structure of existing single-phase traction transformers cannot meet the following low-impedance requirements:
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[0013] The present invention mainly includes T winding 1 and F winding 2, T winding 1 and F winding 2 cross in the middle, the upper part of T winding 1 and the lower part of F winding 2 are placed in the inner winding cardboard tube 3 and the inner winding inner stay 4 above, together with the inner winding pad 5 and the inner winding outer stay 6 to form the inner winding; the lower part of the T winding 1 and the upper part of the F winding 2 are placed on the cardboard tube 7 of the outer winding and the inner stay 8 of the outer winding, and the outer The winding spacer 9 and the outer winding outer strut 10 together constitute the outer winding.
[0014] The struts and pads 3 in the windings 1 and 2 are all made of densified cardboard, which has a small elastic deformation to ensure the axial and radial dimensions of the windings, so that the impedance error of the transformer can meet the requirements.
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The invention relates to a winding structure for a single-phase traction transformer, belonging to the transformer manufacturing technical field. The invention mainly comprises a T winding (1) and an F winding (2), wherein, the T winding (1) is crossed with the F winding (2) on the central part; the upper part of the T winding (1) and the lower part of the F winding (2) are arranged on an inner winding hard paper cylinder (3) and an inner winding inner stay (4) and form an inner winding together with an inner winding cushion block (5) and an inner winding outer stay (6); the lower part of theT winding (1) and the upper part of the F winding (2) are arranged on an outer winding hard paper cylinder (7) and an outer winding inner stay (8) and form an outer winding together with an outer winding cushion block (9) and an outer winding outer stay (10). The stays and the cushion blocks in the windings guarantee the axial height of the windings; the inside diameters of the windings are provided with the hard paper cylinders, and the radial thickness of the windings is guaranteed by the inner stay and the outer stay, thereby the impedance requirement of the single-phase traction transformer for AT power supply and the use requirements of traction lines of railways can be met.
Description
technical field [0001] The invention relates to a winding structure of a single-phase traction transformer, which belongs to the technical field of transformer manufacturing. Background technique [0002] Due to the very small impedance requirements of single-phase traction transformers for AT power supply, the single winding structure of existing single-phase traction transformers cannot meet the following low-impedance requirements: [0003] For single-phase Ii wiring, (3Z 21 +Z 31 -Z 23-1 ) / 4<(0.45 / 4)Ω (error less than ±10%). [0004] in: [0005] Z 21 is the impedance seen from the secondary side (traction winding) after the primary side is short-circuited. [0006] Z 31 It is the impedance seen from the tertiary side (forward feeding winding) after the primary side is short-circuited. [0007] Z 23-1 It is the impedance seen from both ends of the series circuit of the secondary and tertiary windings after the primary side is short-circuited. Contents of th...
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IPC IPC(8): H01F27/28H01F30/10
Inventor 鲁玮周保军马君张健王海龙
Owner WOLONG ELECTRIC YINCHUAN TRANSFORMER