A split coil of a motor

By designing the motor split coil, using multiple strands of softer copper wire connection and insulating layer bandage, the problems of difficult formation and insulation damage of megawatt-level motor coil are solved, and easy forming and improved insulation are achieved.

CN110504775BActive Publication Date: 2025-08-19JIANGSU CRRC ELECTRIC CO LTD
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Patent Information

Application Number
CN201910737883.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-08-12
Publication Date
2025-08-19
Estimated Expiration
2039-08-12

AI Technical Summary

Technical Problem

The coil forming of megawatt-level motors, especially the coil of the split-flap motor, is difficult to form, and easily lead to insulation damage, and the straight edges of the coil are easily deformed during forming.

Method used

A motor split coil is designed, including a first straight edge, a second straight edge, a head end end connection line and a non-head end end connection line. It is connected to the head end and the non-head end end by a multiple softer copper wire, and combined with the insulating layer bandaging process, so as to achieve easy forming of the coil.

Benefits of technology

It realizes easy forming of megawatt-level motor coils, especially the forming of split-flap motor coils, improving the insulation and forming stability of the coil.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention provides a split motor coil, comprising a first straight side, a second straight side, a parallel end connecting wire, and a non-parallel end connecting wire. The parallel end connecting wire is composed of multiple strands of relatively soft copper wire and is used to connect the parallel end copper flat wire of the first straight side and the parallel end copper flat wire of the second straight side. The non-parallel end connecting wire is composed of multiple strands of relatively soft copper wire and is used to connect the non-parallel end copper flat wire of the first straight side and the non-parallel end copper flat wire of the second straight side. The split motor coil of the present invention can facilitate the formation of coils for megawatt-class motors, and further facilitates the formation of split-type motor coils.
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Description

Technical Field

[0001] The present invention belongs to the field of megawatt-class motor split coils, and more particularly relates to a motor split coil. Background Art

[0002] The coil design and forming process of megawatt-class motors are the core technologies of motor manufacturing. The quality of coil insulation directly affects the operating life of the motor. The coil forming of megawatt-class motors is difficult, especially the forming of split-type motor coils. Split-type motors are generally composed of three types of coils. The angles between the coil ends and the straight edges of the coils are about 0°, 45°, and 90°, respectively. These three types of coils are difficult to form, and the insulation is easily damaged during coil forming. In addition, if the straight edge of the coil is too long, the straight edge is also relatively difficult to form and is prone to deformation. Therefore, the coil is designed as a split structure, divided into a straight edge and two ends. When embedding the core, the straight edge is embedded in the core, and then the two ends are connected to the straight edge respectively. Since the ends of a single coil are composed of multiple strands of softer copper wire, the ends are easy to plasticize, so it is relatively easy to shape the ends of adjacent coils. Summary of the Invention

[0003] The object of the present invention is to provide a motor split coil which can facilitate the shaping of the motor coil.

[0004] According to one aspect of the present invention, a motor split coil is provided, comprising a first straight edge, a second straight edge, a parallel end connecting line, and a non-parallel end connecting line.

[0005] The parallel end connecting wire is composed of multiple strands of relatively soft copper wires, and is used to connect the parallel end copper flat wire of the first straight edge and the parallel end copper flat wire of the second straight edge.

[0006] The non-parallel end connecting wires are composed of multiple strands of softer copper wires, and are used for the non-parallel end copper flat wires of the first straight edge and the non-parallel end copper flat wires of the second straight edge.

[0007] In some embodiments, the first straight edge is made of a plurality of larger-sized copper flat wires with insulation.

[0008] One or more flat copper wires or multiple strands of soft copper wires at the parallel ends of the first straight edge are longer than the other flat copper wires.

[0009] The longer one or more flat copper wires or multiple strands of softer copper wires at the parallel ends of the first straight line side are used for parallel connection between coils.

[0010] In some embodiments, the second straight edge is made of a plurality of larger-sized copper flat wires with insulation.

[0011] One or more flat copper wires or multiple strands of soft copper wires at the parallel ends of the second straight side are longer than the other flat copper wires.

[0012] The longer one or more flat copper wires or multiple strands of softer copper wires at the parallel ends of the second straight line side are used for parallel connection between coils.

[0013] In some embodiments, the connector between the end connection line and the first straight edge is covered with an insulating layer, the connector between the end connection line and the second straight edge is covered with an insulating layer, and the end connection line is covered with an insulating layer.

[0014] In some embodiments, the connector between the non-parallel end connecting wires and the first straight edge is covered with an insulating layer, the connector between the non-parallel end connecting wires and the second straight edge is covered with an insulating layer, and the non-parallel end connecting wires are covered with an insulating layer.

[0015] According to another aspect of the present invention, a method for manufacturing a split coil of a motor is provided, comprising:

[0016] Embed the first straight edge and the second straight edge into the core first;

[0017] Use the parallel end connecting wire to connect the parallel end copper flat wire of the first straight side and the parallel end copper flat wire of the second straight side, and after the connection is completed, perform insulation wrapping on the connection joint and the parallel end connecting wire;

[0018] Use the non-parallel end connecting wire to connect the non-parallel end copper flat wire on the first straight side and the non-parallel end copper flat wire on the second straight side, and after the connection is completed, perform insulation wrapping on the connection joint and the non-parallel end connecting wire;

[0019] According to another aspect of the present invention, a method for manufacturing a split coil of a motor is provided, comprising:

[0020] Use the parallel end connecting wire to connect the parallel end copper flat wire of the first straight side and the parallel end copper flat wire of the second straight side. After the connection, the connection joint and the parallel end connecting wire are insulated and wrapped.

[0021] Use the non-parallel end connecting wire to connect the non-parallel end copper flat wire on the first straight side and the non-parallel end copper flat wire on the second straight side. After the connection is completed, the connection joint and the non-parallel end connecting wire are insulated and wrapped.

[0022] After the motor split coil is manufactured as a whole, it is embedded in the iron core.

[0023] The beneficial effect is that the motor split coil of the present invention can make the coil of a megawatt-class motor easy to form, and can make the split-type motor coil easy to form. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a motor split coil according to one embodiment of the present invention. DETAILED DESCRIPTION

[0025] Figure 1 The figure schematically shows a motor split coil according to an embodiment of the present invention. Figure 1 As shown, the motor split coil includes a first straight edge 1, a second straight edge 2, a parallel end connecting line 3 and a non-parallel end connecting line 4.

[0026] Both the first straight side 1 and the second straight side 2 are made of multiple, larger, insulated copper flat wires. At the parallel ends of the first straight side 1, one or more copper flat wires or strands of relatively soft copper wire are longer than the other strands. The longer strands are used to connect the coils together. At the parallel ends of the second straight side 2, one or more copper flat wires or strands of relatively soft copper wire are longer than the other strands. The longer strands are used to connect the coils together. The parallel end connecting wires 3 are made of multiple strands of relatively soft copper wire and are used to connect the parallel end copper flat wires of the first straight side 1 to the parallel end copper flat wires of the second straight side 2. The connector between the parallel end connecting wire 3 and the first straight edge 1 is covered with an insulation layer. The connector between the parallel end connecting wire 3 and the second straight edge 2 is also covered with an insulation layer. The non-parallel end connecting wire is made of multiple strands of relatively soft copper wire. The non-parallel end connecting wire 4 is used to connect the non-parallel end copper flat wire of the first straight edge 1 and the non-parallel end copper flat wire of the second straight edge 2. The connector between the non-parallel end connecting wire 4 and the first straight edge 1 is also covered with an insulation layer. The connector between the non-parallel end connecting wire 4 and the second straight edge 2 is also covered with an insulation layer. The non-parallel end connecting wire 4 is also covered with an insulation layer.

[0027] A process for manufacturing a split motor coil is as follows: first, a first linear side 1 and a second linear side 2 are embedded in an iron core. A parallel-end connecting wire 3 is used to connect the parallel-end copper flat wires of the first linear side 1 and the parallel-end copper flat wires of the second linear side 2. After the connection is completed, the connecting joint and the parallel-end connecting wire 3 are insulated and wrapped. A non-parallel end connecting wire 4 is used to connect the non-parallel end copper flat wires of the first linear side 1 and the non-parallel end copper flat wires of the second linear side 2. After the connection is completed, the connecting joint and the non-parallel end connecting wire 4 are insulated and wrapped.

[0028] Another method for manufacturing a split motor coil is as follows: a parallel-end connecting wire 3 is used to connect the parallel-end copper flat wires of the first linear side 1 and the parallel-end copper flat wires of the second linear side 2. After the connection is complete, the connecting joint and the parallel-end connecting wire 3 are insulated and wrapped. A non-parallel-end connecting wire 4 is used to connect the non-parallel-end copper flat wires of the first linear side 1 and the non-parallel-end copper flat wires of the second linear side 2. After the connection is complete, the connecting joint and the non-parallel-end connecting wire 4 are insulated and wrapped. Once the split motor coil is manufactured as a whole, it is embedded in the core.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A motor split coil, characterized in that: including a first straight edge, a second straight edge, a parallel end connecting line, and a non-parallel end connecting line, The parallel end connecting wire is composed of multiple strands of relatively soft copper wires, and is used to connect the parallel end copper flat wire of the first straight edge and the parallel end copper flat wire of the second straight edge. The non-parallel end connecting wires are composed of multiple strands of softer copper wires, and are used for the non-parallel end copper flat wires of the first straight edge and the non-parallel end copper flat wires of the second straight edge.

2. The motor split coil according to claim 1, characterized in that: The first straight edge is made of various large-sized copper flat wires with insulation. One or more flat copper wires or multiple strands of soft copper wires at the parallel ends of the first straight edge are longer than the other flat copper wires. The longer one or more flat copper wires or multiple strands of softer copper wires at the parallel ends of the first straight line side are used for parallel connection between coils.

3. The motor split coil according to claim 1, characterized in that: The second straight edge is made of various larger copper flat wires with insulation. One or more flat copper wires or multiple strands of soft copper wires at the parallel ends of the second straight side are longer than the other flat copper wires. The longer one or more flat copper wires or multiple strands of softer copper wires at the parallel ends of the second straight line side are used for parallel connection between coils.

4. The motor split coil according to claim 1, characterized in that: The connecting head of the parallel end connecting wire and the first straight side is covered with an insulating layer, the connecting head of the parallel end connecting wire and the second straight side is covered with an insulating layer, and the connecting head of the parallel end connecting wire is covered with an insulating layer.

5. The motor split coil according to claim 1, characterized in that: The connectors of the non-parallel end connecting wires and the first straight edge are covered with an insulating layer, the connectors of the non-parallel end connecting wires and the second straight edge are covered with an insulating layer, and the non-parallel end connecting wires are covered with an insulating layer.

6. A method for manufacturing a motor split coil according to any one of claims 1 to 5, characterized in that: include: Embed the first straight edge and the second straight edge into the core first; Use the parallel end connecting wire to connect the parallel end copper flat wire of the first straight line side and the parallel end copper flat wire of the second straight line side. After the connection is completed, the connection joints and the connecting wires at the end of the parallel end should be insulated and wrapped; Use the non-parallel end connecting wire to connect the non-parallel end copper flat wire on the first straight side and the non-parallel end copper flat wire on the second straight side. After the connection is completed, the connection joint and the non-parallel end connecting wire are insulated and wrapped.

7. A method for manufacturing a motor split coil according to any one of claims 1 to 5, characterized in that: include: Use the parallel end connecting wire to connect the parallel end copper flat wire of the first straight line side and the parallel end copper flat wire of the second straight line side. After the connection is completed, the connection joints and the end connection wires should be insulated and wrapped. Use the non-parallel end connecting wire to connect the non-parallel end copper flat wire on the first straight side and the non-parallel end copper flat wire on the second straight side. After the connection is completed, the connection joint and the non-parallel end connecting wire are insulated and wrapped. After the motor split coil is manufactured as a whole, it is embedded in the iron core.

Citation Information

Patent Citations

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