Entangled cylindrical coil
A cylindrical and coil technology, applied in the direction of transformer/inductor coil/winding/connection, etc., can solve the problems of adding capacitive screens and coils, adding insulation to wires, low production efficiency, and increasing manufacturing difficulty, etc., to achieve vertical capacitance increase Large, improved ability to resist lightning impulse voltage, high production efficiency
Inactive Publication Date: 2021-04-02
WUJIANG TRANSFORMER CO LTD
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Problems solved by technology
In actual production, the production efficiency of wire plus insulation is low, and adding additional capacitive screens and coils will increase the difficulty of manufacturing
Method used
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[0017] An entangled cylindrical coil, comprising multiple sections of multi-layer turns; the first layer of turns includes a first wire d1, a second wire d2 and a connecting wire 22; the first wire d1 is drawn from the second layer The original continuous winding wire; the second wire d2 is wound together with the first wire d1 on the left side of the first wire d1; the first wire d1 and the second wire d2 are cut after winding a specified number of turns to form The first wire end d3 and the second wire end d4; the second wire end d4 serves as the coil lead-out end A; the first wire end d3 is initially connected to the second wire through a connecting wire 22 .
[0018] When the number of turns in the first layer is an even number, take 10 turns as an example in this embodiment, such as figure 1 As shown, 1-5 is the winding of the first wire d1, and 6-10 is the winding of the second wire d2. The first wire d1 and the second wire d2 are cut together after the last turn to form...
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The invention relates to the technical field of transformer manufacturing, and discloses an entangled cylindrical coil which comprises multiple sections and multiple layers of wire turns; the first layer of wire turn comprises a first wire, a second wire and a connecting wire; the first wire is an original continuous winding wire led out from the second layer; the second wire is wound together with the first wire on the left side of the first wire; the first wire and the second wire are respectively cut off to form a first wire end and a second wire end after being wound for a specified numberof turns. The second wire end is used as a coil leading-out end; the first wire end is connected with the starting end of the second wire through a connecting wire. The number of turns of the first layer is an even number, and the first wire and the second wire are cut off together to form a first wire end and a second wire end after being wound by the last turn; the number of turns of the firstlayer is an odd number, and the second wire is cut off to form a second wire end after winding the last but one turn; the first wire is cut off to form a first wire end after the last turn of the first wire is wound.
Description
technical field [0001] The invention relates to a transformer assembly, in particular to an entangled cylindrical coil. Background technique [0002] The high-voltage coil of a 35kV epoxy cast dry-type distribution transformer is usually a segmented cylindrical structure. According to national standards, the lightning impulse test voltage on the high-voltage side is 170kV. When used at high altitudes, the lightning impulse test voltage will be higher. Under the action of impulse voltage, the inter-turn and interlayer voltages at the head and end of the high-voltage coil are high, and breakdown is prone to occur. The tangled cylindrical structure can increase the inter-turn longitudinal capacitance, improve the impact distribution of the coil, and improve the ability of the coil to resist lightning impulse voltage. The high-voltage coils of 35kV epoxy cast dry-type distribution transformers are usually wound by enamelled round wires or flat wires. Through continuous winding...
Claims
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IPC IPC(8): H01F27/30H01F27/29
CPCH01F27/30H01F27/29
Inventor 张新根石培兰吴国强
Owner WUJIANG TRANSFORMER CO LTD