Novel transformer rectangular coil
A rectangular coil and transformer technology, applied in the direction of transformer/inductor coil/winding/connection, etc., can solve the problems of reducing the internal heat dissipation speed of the coil, losing its function, and large interlayer voltage, so as to ensure short-circuit resistance and reduce internal shrinkage and the effect of expanding
Inactive Publication Date: 2009-09-02
JIANGSU HAITIAN ELECTRIC SHARES
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Problems solved by technology
[0002] At present, the coil structure of most transformer products adopts the traditional multi-layer cylindrical coil, high and low voltage separate winding structure, and the amorphous alloy transformer is a rectangular coil. It is necessary to ensure the safety and reliability of the long-term operation of the amorphous alloy transformer. However, the coil structure has the following problems: 1. The interlayer voltage is too large, and the partial discharge is large; 2. The insulation distance between the high and low voltage coils is not easy to guarantee
However, this kind of rectangular coil still has the following problems. The high-voltage insulating cylinder is wrapped on the outside of the low-voltage coil, which reduces the heat dissipation rate inside the coil and shortens the service life of the transformer coil. Due to the short insulation distance, the high-voltage insulation between the high-voltage and low-voltage coils Layers are easily destroyed and lose their effect
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[0008] see figure 1 , the specific embodiment adopts the following technical scheme: it is composed of a molding insulating cylinder 1, a low-voltage coil 2, a high-voltage coil 3, a high-voltage insulating cylinder 4, and a reinforced heat dissipation layer 5. The low-voltage coil 2 is wound on the molding insulating cylinder 1, and the high-voltage insulation The barrel 4 is fixed on the outside of the low-voltage coil 2 , the high-voltage coil 3 is wound on the outside of the high-voltage insulating barrel 4 , and a reinforced heat dissipation layer 5 is arranged on the outside of the high-voltage insulating barrel 4 .
[0009] When this specific embodiment is assembled, the winding is supported on a separate winding system and pressed and fixed. When it is applied to an amorphous alloy transformer, the iron core can be free from pressure, and the radial shrinkage and expansion of the transformer when it is short-circuited is reduced, thereby effectively Ensure the short-ci...
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The invention provides a novel transformer rectangular coil, and relates to an improvement on a transformer coil structure, in particular to an improvement on a transformer rectangular coil. The novel transformer rectangular coil comprises a formed insulating cylinder (1), a low-voltage coil (2), a high-voltage coil (3), a high-voltage insulating cylinder (4) and a reinforced radiating layer (5); the low-voltage coil (2) is wound on the formed insulating cylinder (1); the high-voltage insulating cylinder (4) is fixed outside the low-voltage coil (2); the high-voltage coil (3) is wound outside the high-voltage insulating cylinder (4); and the reinforced radiating layer (5) is arranged outside the high-voltage insulating cylinder (4). The reinforced radiating layer (5) is arranged in the novel transformer rectangular coil so as to reinforce the radiating of the high-voltage coil, prolong the service life of the high-voltage coil, reinforce the radiating area of the coils and increase the insulating distance between the high-voltage coil and the low-voltage coil of the transformer.
Description
Technical field: [0001] The invention relates to an improvement of a transformer coil structure, in particular to an improvement of a transformer rectangular coil. Background technique: [0002] At present, the coil structure of most transformer products adopts the traditional multi-layer cylindrical coil, high and low voltage separate winding structure, while the amorphous alloy transformer is a rectangular coil. It is necessary to ensure the safety and reliability of the long-term operation of the amorphous alloy transformer. However, the coil structure has the following problems: 1. The interlayer voltage is too large, and the partial discharge is large; 2. The insulation distance between the high and low voltage coils is not easy to guarantee. [0003] Chinese patent 200720040423.1 discloses a high-voltage and low-voltage sleeve-wound rectangular coil. It first winds the low-voltage coil, press-fits the low-voltage coil, dips in paint, and solidifies it, then winds the h...
Claims
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IPC IPC(8): H01F27/28H01F27/30
Inventor 于越
Owner JIANGSU HAITIAN ELECTRIC SHARES