Flat wire stator and flat wire motor

Abstract

This application proposes a flat wire stator and a flat wire motor. The flat wire stator includes a stator core and stator windings. The stator windings consist of a three-phase winding connected in a star configuration. Each phase winding includes two parallel first branches and a second branch. Each branch includes multiple alternately connected first and second flat wire conductors. The two insertion points of the same flat wire conductor are located in two conductor layers of the same winding layer. The two insertion points of the first flat wire conductor are spaced six stator slots apart, and the two insertion points of the second flat wire conductor are spaced four stator slots apart. Adjacent insertion points of the first and second flat wire conductors are spaced five stator slots apart. This allows for the use of flat wire conductors of the same wire type to form the flat wire windings, even with each phase winding having two parallel branches. This ensures a uniform manufacturing process for the flat wire stator, eliminating the need for tooling and molds for different wire types of flat wire conductors, thus saving overall production costs.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a flat wire stator and a flat wire motor. Background Technology

[0002] Currently, there are two main types of conductors used in motor stator windings: round copper wire and flat copper wire. Flat copper wire is increasingly favored due to its ability to achieve a higher slot fill factor. For example... Figure 1 As shown, the main shape of the flat copper wire in a hairpin flat wire stator winding is a standard gate shape. However, due to winding design considerations, most existing hairpin flat wire stator windings include some non-standard wire types, such as... Figure 2 and Figure 3 As shown. These flat copper wires require additional tooling and equipment during manufacturing, increasing the overall production cost. Summary of the Invention

[0003] This application aims to at least partially address one of the technical problems in the related art.

[0004] The first aspect of this application proposes a flat wire stator, including a stator core and stator windings. The inner wall of the stator core is uniformly provided with 12p axially penetrating stator slots along the circumference, where p is an odd number. The stator windings include a three-phase winding connected in a star configuration. Each phase winding is sequentially wound around the stator core in multiple stator slots and forms 2n conductor layers from the inside out. Every two adjacent conductor layers form a winding layer, where n is a positive integer. Each phase winding includes two parallel first branches and second branches. The winding directions of the first and second branches of each phase winding are opposite. The first and second branches of each phase winding are alternately arranged along the circumference in each winding layer.

[0005] Each branch includes multiple alternating first flat conductors and second flat conductors. Both the first and second flat conductors are gate-shaped structures, including a hairpin end and two solder ends. The hairpin end and the two solder ends are connected by two parallel plug-in portions, which are located in the stator slots. The two plug-in portions of the same flat conductor are located in two conductor layers of the same winding layer. The two plug-in portions of the first flat conductor are spaced six stator slots apart, and the two plug-in portions of the second flat conductor are spaced four stator slots apart. The two adjacent plug-in portions of the first and second flat conductors are spaced five stator slots apart.

[0006] Optionally, the three-phase winding includes a W-phase winding, a V-phase winding, and a U-phase winding. The first branch of the W-phase winding enters the stator core from the (N+1)th stator slot of the outermost conductor layer and exits the stator core from the (N-5)th stator slot of the innermost conductor layer. The second branch of the W-phase winding enters the stator core from the Nth stator slot of the innermost conductor layer and exits the stator core from the (N+6)th stator slot of the outermost conductor layer.

[0007] The first branch of the V-phase winding enters the stator core from the (N-3)th stator slot of the outermost conductor layer and exits the stator core from the (N-9)th stator slot of the innermost conductor layer. The second branch of the V-phase winding enters the stator core from the (N-4)th stator slot of the innermost conductor layer and exits the stator core from the (N+2)th stator slot of the outermost conductor layer.

[0008] The first branch of the U-phase winding enters the stator core from the (N+5)th stator slot of the outermost conductor layer and exits the stator core from the (N-1)th stator slot of the innermost conductor layer. The second branch of the U-phase winding enters the stator core from the (N+4)th stator slot of the innermost conductor layer and exits the stator core from the (N+10)th stator slot of the outermost conductor layer.

[0009] Wherein, the Nth stator slot is any stator slot of the stator core, and the stator slots arranged in a clockwise direction starting from the Nth stator slot are the (N+1)th stator slot, the (N+2)th stator slot, the (N+3)th stator slot, ... the (N+6p)th stator slot; and the stator slots arranged in a counterclockwise direction are the (N-1)th stator slot, the (N-2)th stator slot, the (N-3)th stator slot, ... the (N-6p-1)th stator slot.

[0010] Optionally, each phase winding's first branch and second branch each include an input terminal and an output terminal, with the output terminal of the first branch and the input terminal of the second branch located in the innermost conductor layer, and the input terminal of the first branch and the output terminal of the second branch located in the outermost conductor layer.

[0011] Optionally, the output terminals of the first branch of each phase winding and the output terminals of the second branch of each phase winding are connected by copper connecting pieces or copper wires to form a neutral point, and the input terminals of the first branch and the second branch of each phase winding are connected by copper connecting pieces or copper wires to form a terminal.

[0012] Optionally, the terminals of each phase winding in the three-phase winding are at the same height, and the neutral point of the three-phase winding is at a height lower than the terminals.

[0013] Optionally, the terminals of each phase winding in the three-phase winding and the neutral point are integrally wrapped with non-metallic injection molding material.

[0014] A second aspect of this application provides a flat wire motor, including a flat wire stator as described in the first aspect of this application.

[0015] The flat wire stator provided in this application has the following beneficial effects:

[0016] By creating 12 slots within the stator core and employing multiple alternating first and second flat wire conductors of the same wire type in the design of the flat wire stator winding, two parallel branches are formed for each phase winding. The two insertion points of the first flat wire conductor are spaced six stator slots apart, the two insertion points of the second flat wire conductor are spaced four stator slots apart, and adjacent insertion points of the first and second flat wire conductors are spaced five stator slots apart. The two insertion points of the same flat wire conductor are located in two conductor layers within the same winding layer. This achieves the goal of forming flat wire windings using flat wire conductors of the same wire type while ensuring two parallel branches in each phase winding. This standardizes the manufacturing process of the flat wire stator, eliminating the need for tooling and molds for different wire types of flat wire conductors, thus saving overall production costs.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a standard gate-type flat wire conductor;

[0020] Figure 2 It is a schematic diagram of the structure of a non-standard flat wire conductor;

[0021] Figure 3 This is a schematic diagram of another non-standard flat wire conductor.

[0022] Figure 4 This is a schematic diagram of the structure of a flat wire stator according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the stator winding structure according to an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the structure of the first flat wire conductor in the embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the structure of the second flat wire conductor in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the structure of the first half of the W-phase winding after it is unfolded and arranged along the circumferential direction in an embodiment of this application.

[0027] Figure 9 This is a schematic diagram of the rear half of the winding structure after unfolding the W-phase windings arranged along the circumferential direction in an embodiment of this application.

[0028] Figure 10 This is a schematic diagram of the stator winding terminals in an embodiment of this application;

[0029] Figure 11 This is a three-dimensional structural diagram of the stator winding terminals in an embodiment of this application. Detailed Implementation

[0030] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings, but these are not intended to limit the scope of this application.

[0031] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0032] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0033] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0034] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features of the claims and are therefore all within the scope of protection defined herein.

[0035] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0036] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0037] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0038] The flat wire stator of this application is described below with reference to the accompanying drawings.

[0039] Figure 4 This is a schematic diagram of a flat wire stator provided in an embodiment of this application.

[0040] like Figure 4 As shown, the flat wire stator may include: stator core 1 and stator winding 2.

[0041] In this embodiment, the inner wall of the stator core 1 is uniformly provided with 12p axially penetrating stator slots along the circumference, where p is an odd number. For example, the number of stator slots in the stator core can be 60, 84, 108, etc. The number of slots per pole per phase of the motor containing this flat wire stator is 2.

[0042] In this embodiment, the stator winding 2 includes a star-connected three-phase winding, namely a W-phase winding, a V-phase winding, and a U-phase winding. Each phase winding is sequentially wound around the stator core in multiple stator slots, forming 2n conductor layers from the inside out. Every two adjacent conductor layers form a winding layer, where n is a positive integer.

[0043] For example, the number of conductor layers in the stator slot can be 4, 6, 8, 10, 12, etc. Figure 5 As shown, taking a 4-layer conductor layer as an example, the innermost conductor layer of the stator winding is taken as the first conductor layer, and the layers increase sequentially from the inside out. The first and second conductor layers form the first winding layer, the third and fourth conductor layers form the second winding layer, and so on.

[0044] In this embodiment, each conductor layer in the stator slot is filled with each phase winding. Specifically, each phase winding includes two parallel first branches and second branches. The winding directions of the first and second branches of each phase winding are opposite. The first and second branches of each phase winding are alternately arranged in the circumferential direction in each winding layer to fill the stator slot.

[0045] Each branch of each phase winding includes multiple alternately connected first flat wire conductors 3 and second flat wire conductors 4. Both the first flat wire conductors 3 and the second flat wire conductors 4 are gate-type structures. For example... Figure 6 and Figure 7 As shown, both the first flat conductor 3 and the second flat conductor 4 include a hairpin end 5 and two welding ends 6, which are connected by two parallel plug-in portions 7. When the flat conductor is inserted into the stator slot, the hairpin end 5 is located at one end of the stator core, the welding end 6 is located at the other end of the stator core, and the two plug-in portions 7 are located in two different stator slots in two conductor layers of the same winding layer.

[0046] The distance between two adjacent stator slots is defined as the slot spacing. The two plug-in portions 7 of the first flat conductor 3 are spaced six stator slots apart, that is, spaced seven slot spacings L1 apart. For example, the two plug-in portions 7 of the first flat conductor 3 are located in the 1st stator slot and the 8th stator slot, respectively, with a gap of six stator slots in between.

[0047] Similarly, the two insertion portions 7 of the second flat conductor 4 are spaced four stator slots apart, that is, spaced five slot spacing L2 apart. For example, the two insertion portions 7 of the second flat conductor 4 are located in the second stator slot and the seventh stator slot, respectively, with a space of four stator slots in between.

[0048] When multiple first flat conductors 3 and second flat conductors 4 are connected alternately in sequence, the two adjacent plug-in parts 7 of two adjacent first flat conductors 3 and second flat conductors 4 are spaced five stator slots apart, that is, spaced six slots apart.

[0049] In this embodiment, the winding uses two flat wire conductors with different spans connected alternately, which has a certain optimization effect on the balance of resistance and inductance of the stator winding.

[0050] Taking a stator core with 60 stator slots as an example, the winding method of the first and second branches of the W-phase windings connected in parallel in the first winding layer is as follows: Figure 8 and Figure 9 As shown. Among them, Figure 8 This is a schematic diagram of the structure of the first half of the W-phase winding after it has been unfolded along the circumference. Figure 9 This is a schematic diagram of the latter half of the winding structure after unfolding the W-phase windings arranged along the circumference.

[0051] Take any stator slot of the stator core as the Nth stator slot, and define the stator slots arranged in a clockwise direction starting from the Nth stator slot as the N+1th stator slot, the N+2th stator slot, the N+3rd stator slot, ..., the N+6pth stator slot; and define the stator slots arranged in a counterclockwise direction as the N-1th stator slot, the N-2th stator slot, the N-3rd stator slot, ..., the N-6p-1st stator slot.

[0052] For example, when the stator core has 60 stator slots, if any one of the stator slots is taken as the Nth stator slot, then starting from the Nth stator slot, the stator slots arranged in a clockwise direction are the N+1st stator slot, the N+2nd stator slot, the N+3rd stator slot, ... the N+30th stator slot; and the stator slots arranged in a counterclockwise direction are the N-1st stator slot, the N-2nd stator slot, the N-3rd stator slot, ... the N-29th stator slot.

[0053] In this winding, the first branch of the W-phase winding is formed by alternating connections of 10 first flat wire conductors 3 and 10 second flat wire conductors 4 in the first winding layer. The first insertion part of the first first flat wire conductor 3 is located in the (N+1)th stator slot of the second conductor layer. Since the two insertion parts of the first flat wire conductor are separated by six stator slots, the second insertion part of the first first flat wire conductor 3 is located in the (N+7)th stator slot of the first conductor layer. Since the two adjacent insertion parts of the first flat wire conductor 3 and the second flat wire conductor 4 are separated by five stator slots, the first insertion part of the first second flat wire conductor 4 adjacent to the first first flat wire conductor 3 is located in the (N+12)th stator slot of the second conductor layer. Since the two insertion parts of the second flat wire conductor 4 are separated by four stator slots, the second insertion part of the first second flat wire conductor 4 is located in the (N+16)th stator slot of the first conductor layer. Similarly, the first branch of the W-phase winding is located in the N-5th stator slot of the N-5th conductor in the first winding layer, at the second insertion point of the 10th second flat conductor in the first winding layer.

[0054] The first branch of the W-phase winding is arranged in the same way as the first winding layer in the other winding layers. The first branch is formed by connecting the second weld of the 10th second flat conductor 4 in the adjacent outer winding layer to the first weld of the 1st first flat conductor 3 in the inner winding layer. In other words, the first branch of the W-phase winding enters the stator core from the (N+1)th stator slot in the outermost conductor layer and exits the stator core from the (N-5)th stator slot in the innermost conductor layer.

[0055] The second branch of the W-phase winding is formed by alternating connections of 10 first flat wire conductors 3 and 10 second flat wire conductors 4 in the first winding layer. The first insertion point of the first first flat wire conductor 3 is located in the Nth stator slot of the first conductor layer. Since the two insertion points of the first flat wire conductor 3 are separated by six stator slots, the second insertion point of the first first flat wire conductor 3 is located in the (N+6)th stator slot of the second conductor layer. Since the two adjacent insertion points of the first flat wire conductor 3 and the second flat wire conductor 4 are separated by five stator slots, the first insertion point of the first second flat wire conductor 4 adjacent to the first first flat wire conductor 3 is located in the (N+11)th stator slot of the first conductor layer. Since the two insertion points of the second flat wire conductor 4 are separated by four stator slots, the second insertion point of the first second flat wire conductor 4 is located in the (N+15)th stator slot of the second conductor layer. Similarly, the second branch of the W-phase winding is located in the N+6th stator slot of the N-phase conductor layer, at the second insertion point of the 10th second flat conductor in the first winding layer.

[0056] The second branch of the W-phase winding is arranged in the same way as the first winding layer in the other winding layers. The second branch is formed by connecting the second weld of the 10th second flat conductor 4 in the adjacent inner winding layer to the first weld of the 1st first flat conductor 3 in the outer winding layer. In other words, the second branch of the W-phase winding enters the stator core from the Nth stator slot in the innermost conductor layer and exits the stator core from the (N+6)th stator slot in the outermost conductor layer.

[0057] It should be noted that the winding direction and connection method of the V-phase winding and U-phase winding in each winding layer are the same as those of the W-phase winding, except that the stator slots they enter and exit are different. In this embodiment, the first branch of the V-phase winding enters the stator core from the (N-3)th stator slot of the outermost conductor layer and exits the stator core from the (N-9)th stator slot of the innermost conductor layer. The second branch of the V-phase winding enters the stator core from the (N-4)th stator slot of the innermost conductor layer and exits the stator core from the (N+2)th stator slot of the outermost conductor layer. The first branch of the U-phase winding enters the stator core from the (N+5)th stator slot of the outermost conductor layer and exits the stator core from the (N-1)th stator slot of the innermost conductor layer. The second branch of the U-phase winding enters the stator core from the (N+4)th stator slot of the innermost conductor layer and exits the stator core from the (N+10)th stator slot of the outermost conductor layer.

[0058] In this embodiment, the winding direction of the first branch of the U, V, and W three-phase windings is from the outside to the inside, and the winding direction of the second branch of the U, V, and W three-phase windings is from the inside to the outside. That is, the output terminal of the first branch and the input terminal of the second branch of the U, V, and W three-phase windings are located in the innermost conductor layer, and the input terminal of the first branch and the output terminal of the second branch of the U, V, and W three-phase windings are located in the outermost conductor layer.

[0059] like Figure 10 As shown, the output terminals of the first branch of the U, V, and W three-phase windings are led out from the (N-1), (N-9), and (N-5)th stator slots of the innermost conductor layer, respectively. The output terminals of the second branch of the U, V, and W three-phase windings are led out from the (N+10), (N+2), and (N+6)th stator slots of the outermost conductor layer, respectively. The six output terminals of the U, V, and W three-phase windings are connected to form the neutral point 8 through copper connecting pieces or copper wires.

[0060] The input terminal of the first branch of the U-phase winding is led out from the N+5th stator slot of the outermost conductor layer, and the input terminal of the second branch of the U-phase winding is led out from the N+4th stator slot of the innermost conductor layer. The two input terminals are connected as the terminal 9 of the U-phase winding through copper connecting pieces or copper wires.

[0061] Similarly, the input terminal of the first branch of the V-phase winding is led out from the N-3rd stator slot of the outermost conductor layer, and the input terminal of the second branch of the V-phase winding is led out from the N-4th stator slot of the innermost conductor layer. The two input terminals are connected as the terminal 10 of the V-phase winding through copper connecting pieces or copper wires.

[0062] Similarly, the input terminal of the first branch of the W-phase winding is led out from the (N+1)th stator slot of the outermost conductor layer, and the input terminal of the second branch of the W-phase winding is led out from the Nth stator slot of the innermost conductor layer. The two input terminals are connected as the terminal 11 of the W-phase winding through copper connecting pieces or copper wires.

[0063] In this embodiment, the connection points of each terminal of the three-phase winding are relatively concentrated, which is beneficial for the design and manufacture of the stator wiring. Furthermore, the terminal heights of each phase winding in the U, V, and W three-phase windings are the same, and the neutral point of the three-phase windings is lower than the terminal heights of each phase winding, ensuring safe electrical clearance. Figure 11 As shown, the terminals and neutral point of each phase winding in the three-phase winding are wrapped together by non-metallic injection molding material to form a whole, which facilitates the assembly of the motor stator.

[0064] The flat wire stator of this application embodiment uses 12p stator slots within the stator core and employs multiple alternating first and second flat wire conductors of the same wire type in the flat wire stator winding design to form two parallel branches for each phase winding. The two insertion portions of the first flat wire conductor are spaced six stator slots apart, the two insertion portions of the second flat wire conductor are spaced four stator slots apart, and adjacent insertion portions of the first and second flat wire conductors are spaced five stator slots apart. The two insertion portions of the same flat wire conductor are located in two conductor layers of the same winding layer. This achieves the goal of forming flat wire windings using flat wire conductors of the same wire type while ensuring that each phase winding includes two parallel branches. This results in a standardized manufacturing process for the flat wire stator, eliminating the need for tooling and molds for different wire types of flat wire conductors, thus saving overall production costs.

[0065] This application also proposes a flat wire motor, including a flat wire stator as described in the foregoing embodiments of this application.

[0066] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A flat wire stator, comprising a stator core and stator windings, characterized in that: The stator core has 12p axially penetrating stator slots evenly distributed along its circumference, where p is an odd number. The stator windings include a three-phase winding connected in a star configuration. Each phase winding is sequentially wound around the stator core in multiple stator slots and forms 2n conductor layers from the inside out. Every two adjacent conductor layers form a winding layer, where n is a positive integer. Each phase winding includes two parallel first branches and second branches. The first and second branches of each phase winding have opposite winding directions. The first and second branches of each phase winding are alternately arranged along the circumference in each winding layer. Each branch includes multiple alternating first flat conductors and second flat conductors. Both the first and second flat conductors are gate-type structures, including a hairpin end and two solder ends. The hairpin end and the two solder ends are connected by two parallel plug-in portions, which are located in the stator slots. The two plug-in portions of the same flat conductor are located in two conductor layers of the same winding layer. The two plug-in portions of the first flat conductor are spaced six stator slots apart, and the two plug-in portions of the second flat conductor are spaced four stator slots apart. The two adjacent plug-in portions of the first and second flat conductors are spaced five stator slots apart. The three-phase winding is composed only of conductors of the first and second flat conductor types.

2. The flat wire stator as described in claim 1, characterized in that, The three-phase winding includes a W-phase winding, a V-phase winding, and a U-phase winding. The first branch of the W-phase winding enters the stator core from the (N+1)th stator slot of the outermost conductor layer and exits the stator core from the (N-5)th stator slot of the innermost conductor layer. The second branch of the W-phase winding enters the stator core from the Nth stator slot of the innermost conductor layer and exits the stator core from the (N+6)th stator slot of the outermost conductor layer. The first branch of the V-phase winding enters the stator core from the (N-3)th stator slot of the outermost conductor layer and exits the stator core from the (N-9)th stator slot of the innermost conductor layer. The second branch of the V-phase winding enters the stator core from the (N-4)th stator slot of the innermost conductor layer and exits the stator core from the (N+2)th stator slot of the outermost conductor layer. The first branch of the U-phase winding enters the stator core from the (N+5)th stator slot of the outermost conductor layer and exits the stator core from the (N-1)th stator slot of the innermost conductor layer. The second branch of the U-phase winding enters the stator core from the (N+4)th stator slot of the innermost conductor layer and exits the stator core from the (N+10)th stator slot of the outermost conductor layer. Wherein, the Nth stator slot is any stator slot of the stator core, and the stator slots arranged in a clockwise direction starting from the Nth stator slot are the (N+1)th stator slot, the (N+2)th stator slot, the (N+3)th stator slot, ... the (N+6p)th stator slot; and the stator slots arranged in a counterclockwise direction are the (N-1)th stator slot, the (N-2)th stator slot, the (N-3)th stator slot, ... the (N-6p-1)th stator slot.

3. The flat wire stator as described in claim 1, characterized in that, Each phase winding has a first branch and a second branch, both of which include an input terminal and an output terminal. The output terminal of the first branch and the input terminal of the second branch are located in the innermost conductor layer, while the input terminal of the first branch and the output terminal of the second branch are located in the outermost conductor layer.

4. The flat wire stator as described in claim 3, characterized in that, In the three-phase winding, the output terminal of the first branch of each phase winding and the output terminal of the second branch of each phase winding are connected by copper connecting pieces or copper wires to form a neutral point. The input terminal of the first branch of each phase winding and the input terminal of the second branch are connected by copper connecting pieces or copper wires to form a terminal.

5. The flat wire stator as described in claim 4, characterized in that, The terminals of each phase winding in the three-phase winding are at the same height, and the neutral point of the three-phase winding is at a height lower than the terminals.

6. The flat wire stator as described in claim 5, characterized in that, The terminals of each phase winding in the three-phase winding and the neutral point are integrally wrapped with non-metallic injection molding material.

7. A flat wire motor, characterized in that, Includes the flat wire stator as described in any one of claims 1-6.

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