Winding mode beneficial to winding of flat wire motor Busbar

Abstract

The invention relates to the technical field of flat wire motors, and discloses a winding method beneficial to a flat wire motor Busbar, which comprises a stator core and stator windings, a plurality of groups of stator windings pass through stator slots on the inner side of the stator core, and effective areas, connected with the stator slots on the inner side of the stator core, of two sides of each group of stator windings stretch across the same (A1-, A1 +, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1-, A1- A < 2-> and A < 2 + >) are arranged in the stator slots, the connection positions of the adjacent stator windings and the stator core are crossed pairwise, the connection points of the stator windings on the outer side and the inner side are gap bridge connection positions, the gap bridge connection positions are spaced by one stator slot, and the gap bridge connection positions are close to a neutral point and wire inlet and outlet positions. According to the winding mode beneficial to the Busbar winding of the flat wire motor, by changing the hairpin welding position, the distance between the neutral point and the three-phase outgoing line position is closer, and the neutral point, a gap bridge line and a three-phase outgoing line welding spot are closer, so that the welding process of the flat wire motor is simpler, the efficiency is higher, and Busbar integration is more facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of flat wire motors, and in particular to a winding method that is beneficial to a Busbar of a flat wire motor. Background Art

[0002] Carbon neutrality is a global consensus in the 21st century, and countries around the world are moving towards this goal. Electric energy, as a new type of clean energy, is currently widely used in the automotive field. Electric vehicles have gradually replaced traditional fuel vehicles and will become mainstream in the near future. As one of the core components of electric vehicles, motors are crucial. Major vehicle manufacturers have higher and higher requirements for motors. Higher integration, higher efficiency, smaller size, and lighter weight have become the development direction of motors. The use of round copper wire as windings in traditional motors can no longer meet the needs of the public. Flat wire motors that use flat copper wire as motor windings have emerged and will surely become the development trend of new energy electric vehicles. Compared with round wires, flat wire motors have higher efficiency and slot fill rate. Since flat wire motors can take smaller slot sizes, they can effectively reduce the cogging torque, thereby reducing motor noise. The internal gap of the flat wire motor winding is small, and the contact area between wires and between windings and core slots is larger, so the heat dissipation and thermal conductivity are better, the temperature rise is lower, and the overall performance of the motor is better.

[0003] The process of flat wire motor winding is more complicated than that of round wire. It adopts hairpin wave winding, and its winding methods are more diverse. However, in most winding methods, the neutral point is far away from the output end of each phase, and the welding is more complicated, which is not conducive to busbar integration. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a winding method that is beneficial to the Busbar of a flat wire motor, which has the advantages of reducing losses, reducing the height of the end windings, and improving the efficiency of the motor, and solves the problem of inconvenient Busbar integration.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: A winding method for a flat wire motor Busbar, comprising a stator core and a stator winding, wherein a plurality of groups of the stator windings pass through stator slots on the inner side of the stator core, and the effective area of ​​each group of the stator windings connected to the stator slots on the inner side of the stator core on both sides spans the same (A 1 -、A 1+ , A 2 -、A 2+) stator slots, the positions where adjacent stator windings are connected to the stator core cross each other, the connection points of the outer and inner stator windings are bridge connections, the bridge connections are separated by one stator slot, and the bridge connections are close to the neutral point and the input and output lines.

[0008] The neutral point, bridge line, and three-phase outgoing line welding points are closer, making the flat wire motor welding process simpler, more efficient, and more conducive to busbar integration.

[0009] Preferably, the neutral point is a common connection point where the head ends (or tail ends) of the stator windings are connected together.

[0010] Preferably, the inlet and outlet lines are locations where the stator winding is connected to the stator core.

[0011] Compared with the prior art, the present invention provides a winding method that is beneficial to the Busbar of a flat wire motor, and has the following beneficial effects:

[0012] This is beneficial to the winding winding method of the flat wire motor Busbar. By changing the welding position of the hairpin, the neutral point and the three-phase outgoing line position are closer, and the neutral point, the bridge line, and the three-phase outgoing line welding points are closer, making the flat wire motor welding process simpler and more efficient, and more conducive to Busbar integration. At the same time, the end winding height is reduced, the connection wire is reduced, the use of copper materials is reduced, the loss of the flat wire motor is reduced, and the heating of the winding is reduced, thereby improving the efficiency of the flat wire motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the winding unwinding method of the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 A winding method for a flat wire motor Busbar, comprising a stator core and a stator winding, wherein a plurality of groups of the stator windings pass through stator slots on the inner side of the stator core, and an effective area of ​​each group of the stator windings connected to the stator slots on the inner side of the stator core on both sides spans the same (A 1 -、A 1+ , A 2 -、A 2+) stator slots, the positions where adjacent stator windings are connected to the stator core are crossed in pairs, the connection points of the outer and inner stator windings are bridge connections, the bridge connections are separated by one stator slot, and the bridge connections are close to the neutral point and the input and output lines, the neutral point is the common connection point where the head ends (or tail ends) of the stator windings are connected together, and the input and output lines are the positions where the stator windings are connected to the stator core.

[0016] When in use, the effective area of ​​each group of stator windings connected to the stator slots inside the stator core spans the same (A 1 -、A 1+ , A 2 -、A 2+ ) of the stator slot, A 1 - to A 1+ , A 2 - to A 2+ The spacing areas are the same, and the positions where the adjacent stator windings are connected to the stator core are crossed in pairs. By changing the welding position of the stator winding and the stator core, the neutral point and the three-phase output line position are made closer, so that the neutral point, the bridge line, and the three-phase output line welding points are made closer, making the flat wire motor welding process simpler, more efficient, and more conducive to Busbar integration. At the same time, the end winding height is reduced, the connection wire is reduced, the use of copper materials is reduced, the loss of the flat wire motor is reduced, and the heating of the winding is reduced, thereby improving the efficiency of the flat wire motor.

[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winding method for a flat wire motor Busbar, comprising a stator core and a stator winding, characterized in that: Several groups of stator windings pass through the stator slots inside the stator core, and the effective area of ​​each group of stator windings connected to the stator slots inside the stator core on both sides spans the same (A1-, A 1+ , A2-, A 2+ ) stator slots, the positions where adjacent stator windings are connected to the stator core cross each other, the connection points of the outer and inner stator windings are bridge connections, the bridge connections are separated by one stator slot, and the bridge connections are close to the neutral point and the input and output lines.

2. A winding method for a flat wire motor Busbar according to claim 1, characterized in that: The neutral point is the common point where the head ends (or tail ends) of the stator windings are connected together.

3. The winding method for a flat wire motor Busbar according to claim 1 is characterized in that: The inlet and outlet lines are where the stator winding is connected to the stator core.

Images