Novel Litz conductor wire, motor and all-in-one driving assembly

Abstract

The utility model discloses a novel Litz conductor wire, a motor and an all-in-one driving assembly, the Litz conductor wire comprises a flat wire and at least one strand of thin wire which is spirally wound on the periphery of the flat wire side by side, and the thin wire is flush at two end parts of the flat wire and is electrically connected with the flat wire. The area outside the two ends of the flat wire is insulated from the thin wire, and the Litz conductor wire keeps a basic flat wire contour shape. According to the utility model, the motor winding is designed and adjusted, and the flat wire winding and the round wire winding are combined, so that the characteristic of high efficiency of the motor applying the flat wire winding is reserved, and meanwhile, the round wires are connected in parallel to reduce the sectional area of the flat wires, reduce the skin effect, further improve the efficiency and reduce the copper loss.

Description

Technical Field

[0001] This utility model relates to motor winding wires, and more particularly to a novel Litz conductor wire and a motor and all-in-one drive assembly using the Litz conductor wire. Background Technology

[0002] In the current design of motor windings for new energy vehicles, the winding wire type is generally divided into two types: traditional round wire windings and flat wire windings, which have emerged in recent years.

[0003] Compared to round wire windings, electric drives with flat wire windings offer advantages such as a larger high-efficiency area, higher heat dissipation efficiency, and higher power density. Currently, flat wires are generally made of high-purity oxygen-free copper, and multi-layer winding structures are designed in the form of hair-pin or I-pin according to the aspect ratio.

[0004] In existing technologies, flat wire windings, due to their larger cross-sectional area, cause uneven distribution of current in the three phases across the cross-section due to the skin effect. The current accumulates on the surface, resulting in increased winding resistance, increased copper losses, and reduced motor efficiency. In high-frequency alternating current, the proximity effect caused by mutual inductance further increases copper losses and reduces motor efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a novel Litz conductor wire to reduce the skin effect and the proximity effect caused by mutual inductance, thereby reducing copper losses in motors operating under high-level AC current.

[0006] Therefore, this utility model provides a novel Litz conductor wire, comprising a flat conductor and at least one thin conductor spirally wound around the outer periphery of the flat conductor, wherein the thin conductor is flush with both ends of the flat conductor and electrically connected to the flat conductor, the area outside the two ends of the flat conductor is insulated from the thin conductor, and the Litz conductor wire maintains the basic flat conductor outline shape.

[0007] Furthermore, the aforementioned thin conductor is a round wire.

[0008] Furthermore, the aforementioned thin conductor is a flat wire.

[0009] Furthermore, the thin wire and the flat wire are brazed together at their ends.

[0010] Furthermore, the number of the aforementioned fine wires can be 5-13 strands.

[0011] Furthermore, the cross-sectional shape of the aforementioned Liz conductor wire is rectangular or rounded rectangular.

[0012] This utility model also provides an electric motor, including motor winding wire, wherein the motor winding wire is the novel Litz conductor wire described above.

[0013] This utility model also provides an all-in-one drive assembly, including a reducer, a controller, and a motor, wherein the motor is the motor described above.

[0014] This invention redesigns and adjusts the motor windings by combining flat wire windings and round wire windings. This retains the high efficiency of motors using flat wire windings while reducing the cross-sectional area of ​​the flat wires by using parallel round wires, thus reducing the skin effect, further improving efficiency, and reducing copper losses.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is the Litz conductor wire for motor windings according to Embodiment 1 of this utility model;

[0018] Figure 2 The twisting method of the Litz conductor wire in Embodiment 1 of this utility model is shown;

[0019] Figure 3 The Litz conductor wire for motor windings according to Embodiment 2 of this utility model is shown. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Example 1

[0022] Combined with reference Figure 1 and Figure 2 The Litz conductor wire for motor winding in this embodiment includes a flat conductor 1 and multiple thin conductors 2 spirally wound around the outer periphery of the flat conductor. The multiple thin conductors are flush with both ends of the flat conductor and are electrically connected to the flat conductor. Both the flat conductor and the thin conductors are enameled wires. The area of ​​the flat conductor outside the two ends is insulated from the multiple thin conductors, and the motor winding assembly maintains the basic flat conductor outline shape.

[0023] In this embodiment, several strands of round wire are spirally wound in parallel around the flat conductor. The flat conductor and the surface of the spiral round wire are insulated by insulating varnish. In this way, the large current-carrying cross-section of the traditional flat wire is divided into a relatively small flat wire interface and several small independent circular cross-sections. The flat conductor and the multi-strand spirally wound round wire are connected in parallel, which retains the characteristics of low resistance and large total current-carrying cross-sectional area of ​​the combined conductor. At the same time, the surfaces of the flat conductor and the round wire are insulated from each other, effectively reducing the skin effect.

[0024] At the same time, the wound circular wire can effectively reduce the proximity effect caused by mutual inductance, reduce the copper loss of the motor in high-level AC, expand the high-efficiency range of the motor and increase the motor efficiency.

[0025] Example 2

[0026] like Figure 3 As shown, compared with Embodiment 1, the difference in this embodiment is that the wound wire is replaced with a flat enameled wire. This can further improve the filling rate of the wound wire and increase the heat dissipation efficiency while suppressing the traditional skin effect.

[0027] In addition to being used in motor windings, the Litz conductor wire of this invention can also be used in other applications, such as solenoids and coils.

[0028] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel Litz conductor wire, characterized in that, It includes a flat conductor and at least one thin conductor spirally wound around the periphery of the flat conductor, the thin conductor being flush with and electrically connected to the flat conductor at both ends of the flat conductor, the area outside the ends of the flat conductor being insulated from the thin conductor, and the Litz conductor maintaining the basic flat conductor outline shape.

2. The novel Litz conductor wire according to claim 1, characterized in that, The thin conductor is a round wire.

3. The novel Litz conductor wire according to claim 1, characterized in that, The thin conductor is a flat wire.

4. The novel Litz conductor wire according to claim 1, characterized in that, The thin wire and the flat wire are brazed together at their ends.

5. The novel Litz conductor wire according to claim 1, characterized in that, The number of fine wires can be 5-13 strands.

6. The novel Lids conductor wire according to claim 1, characterized in that, The cross-sectional shape of the Liz conductor wire is rectangular or rounded rectangle.

7. An electric motor, comprising motor winding wires, characterized in that, The motor winding wire is a novel Litz conductor wire according to any one of claims 1-6.

8. An all-in-one drive assembly, comprising a reducer, a controller, and a motor, characterized in that, The motor is the motor according to claim 7.

Images