This application is based on Japanese Patent Application No. 2013-056296 filed with the Japan Patent Office on Mar. 19, 2013, the entire content of which is hereby incorporated by reference.
1. Technical Field
This disclosure relates to a wound member for manufacturing a coil, a coil, a rotating electrical machine, and a method for manufacturing a coil.
2. Related Art
Conventionally, there is known a rotating electrical machine with coils wound around slots of a stator (for example, see JP-A-2009-189078). In the publication, winding a wire rod around a spool with an approximately rectangular cross section forms an approximately rectangular coil (a wound member for manufacturing a coil). Afterwards, bending the approximately rectangular coil to an inner peripheral side or an outer peripheral side of a stator forms the coil. In addition, the end of the coil (coil end) bent to the inner peripheral side or the outer peripheral side of a stator is formed shifted in the radial direction (to the inner peripheral side or the outer peripheral side).
A wound member for manufacturing a coil is a wound member for manufacturing a coil wound around a slot of a stator core. The wound member for manufacturing a coil includes: a first side and a second side disposed opposite one another so as to be end sides of coil ends; and a third side and a fourth side that respectively couple the first side and the second side, wherein at least one of the first side and the second side is wrapped such that a side end at an outer peripheral side is shifted to an outer peripheral side to form a side end at an outer peripheral side to be an approximately flat surface when the first side and the second side become end sides of the coil ends.
In the following detailed description, for purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
A wound member for manufacturing a coil according to a first aspect is a wound member for manufacturing a coil wound around a slot of a stator core. The wound member for manufacturing a coil includes: a first side and a second side disposed opposite one another so as to be end sides of coil ends; and a third side and a fourth side that respectively couple the first side and the second side, wherein at least one of the first side and the second side is wrapped such that a side end at an outer peripheral side is shifted to an outer peripheral side to form a side end at an outer peripheral side to be an approximately flat surface when the first side and the second side become end sides of the coil ends.
In the wound member for manufacturing a coil of the first aspect, as described above, at least one of the first side and the second side is wrapped such that a side end at an outer peripheral side is shifted to an outer peripheral side to form a side end at the outer peripheral side to be an approximately flat surface when the first side and the second side become end sides of the coil ends opposing one another. This forms the side end at the outer peripheral side to be an approximately flat surface after the end sides of the coil ends are formed. This reduces an increase in the length of the coil in the radial direction, different from the case where the side end at the outer peripheral side after the end sides of the coil ends are formed is shifted to the inner peripheral side or the outer peripheral side.
A coil according to a second aspect is a coil wound around a slot of a stator core. The coil includes the wound member for manufacturing a coil according to the first aspect, wherein at least one of the first side and the second side of the wound member for manufacturing a coil is wrapped such that the side end at the outer peripheral side is shifted to the outer peripheral side, and at least one of the first side and the second side becomes an end side of the coil end with a side end at the outer peripheral side of an approximately flat surface by bending at least one of a part of the first-side side and a part of the second-side side of the wound member for manufacturing a coil.
In the wound member for manufacturing a coil of the second aspect, as described above, at least one of the first side and the second side is wrapped such that the side end at the outer peripheral side is shifted to the outer peripheral side. At least one of the first side and the second side becomes an end side of the coil end with a side end at an outer peripheral side of an approximately flat surface by bending at least one of a part of a first-side side and a part of a second-side side of the wound member for manufacturing a coil. Accordingly, the side end at the outer peripheral side after the end side of the coil end is formed becomes an approximately flat surface. This reduces an increase in the length of the coil in the radial direction, different from the case where the side end at the outer peripheral side after the end sides of the coil ends are formed is shifted to the inner peripheral side or the outer peripheral side.
A rotating electrical machine according to a third aspect includes a stator core and the coil according to the second aspect. The coil is wound around a slot of the stator core.
In the a rotating electrical machine of the third aspect, as described above, at least one of the first side and the second side is wrapped such that the side end at the outer peripheral side is shifted to the outer peripheral side. At least one of the first side and the second side becomes an end side of the coil end with a side end at an outer peripheral side of an approximately flat surface by bending at least one of a part of a first-side side and a part of a second-side side of the wound member for manufacturing a coil. Accordingly, the side end at the outer peripheral side after the end side of the coil end is formed becomes an approximately flat surface. This reduces an increase in the length of the coil in the radial direction, different from the case where the side end at the outer peripheral side after the end sides of the coil ends are formed is shifted to the inner peripheral side or the outer peripheral side.
A method for manufacturing a coil according to a fourth aspect is a method for manufacturing a coil wound around a slot of a stator core. The method includes: preparing a wound member for manufacturing a coil including a first side, a second side, a third side, and a fourth side, the first side and the second side opposing one another, the third side and the fourth side coupling the first side and the second side, at least one of the first side and the second side being wrapped such that a side end at an outer peripheral side is shifted to an outer peripheral side; and forming an end side of a coil end with a side end at an outer peripheral side of approximately flat surface, the end side being formed by bending at least one of a part of the first-side side and a part of the second-side side of the wound member for manufacturing a coil.
In the method for manufacturing a coil of the fourth aspect, as described above, at least one of the first side and the second side is wrapped such that the side end at the outer peripheral side is shifted to the outer peripheral side. At least one of the first side and the second side becomes an end side of the coil end with a side end at an outer peripheral side of an approximately flat surface by bending at least one of a part of a first-side side and a part of a second-side side of the wound member for manufacturing a coil. Accordingly, the side end at the outer peripheral side after the end side of the coil end is formed becomes an approximately flat surface. This reduces an increase in the length of the coil in the radial direction, different from the case where the side end at the outer peripheral side after the end sides of the coil ends are formed is shifted to the inner peripheral side or the outer peripheral side.
With the wound member for manufacturing a coil, the coil, the rotating electrical machine, and the method for manufacturing a coil, the reduction of an increase in length of the coil in the radial direction is ensured.
Hereinafter, a description will be given of this embodiment based on the drawings.
First, a description will be given of a constitution of an electric motor 100 according to the first embodiment with reference to
As illustrated in
The stator 1 includes a stator core 1a and a plurality of coils 1b. The stator core 1a includes a plurality of slots 11. The plurality of coils 1b is mounted to the respective slots 11. The stator core 1a is formed in a cylindrical shape. The stator core 1a includes a plurality of teeth 12 that extend to inside in a radial direction B at the inner peripheral side of the stator core 1a. The teeth 12 are equiangularly spaced along a circumferential direction C of the stator core 1a. The slots 11 are disposed between these teeth 12.
The electric motor 100 is a three-phase AC current rotating electrical machine. In the electric motor 100, three-phase coils are mounted to the respective slots 11 by concentric winding among distributed winding. For example, the electric motor 100 includes the rotating electrical machine with eight poles and 48 slots. This rotating electrical machine has the number of slots q:q=2 (=48/(3×8)) in every pole and every phase. The plurality of coils 1b include three types of coils: a U-phase coil 30, a V-phase coil 40, and a W-phase coil 50 corresponding to each phase of the three-phase AC current. As illustrated in
An exemplary coil arrangement in concentric winding is illustrated in
As illustrated in
Next, coils in each phase will be specifically described. In the following description, the axial direction A of the cylindrical-shaped stator core 1a is denoted as an “axial direction.” The radial direction B of the stator core 1a is denoted as a “radial direction.” The circumferential direction C of the stator core 1a is denoted as a “circumferential direction.”
As illustrated in
The pair of bent portions 32 has the same shape. Specifically, as illustrated in
As illustrated in
As illustrated in
An amount of projection L1 of the bent portion 35 to the inside in the radial direction of the stator core 1a is the smallest compared with an amount of projection L2 of the bent portion 43 of the V-phase coil 40 to the inside in the radial direction (see
The coupler 36 extends along the circumferential direction of the stator core 1a. For example, the coupler 36 extends in an arc shape along the circumferential direction of the stator core 1a. Length L4 of the coupler 36 in the circumferential direction is the longest compared with length L5 of the coupler 44 of the V-phase coil 40 in the circumferential direction (see
As illustrated in
The V-phase coil 40 includes a pair of bent portions 43 and a coupler 44 at one side of the coil end (the A2 direction side). The coupler 44 couples the tips of the pair of bent portions 43. The pair of bent portions 43 has an approximately S shape. The V-phase coil 40 is bent to the radial direction of the stator core 1a along the direction that the flat conductive wire is laminated. The V-phase coil 40 is bent so as to have a different shape from the U-phase coil 30 and the W-phase coil 50. The V-phase coil 40 is bent to the inside in the radial direction at the coil end at one side in the axial direction of the stator core 1a (the A2 direction side). Moreover, the V-phase coil 40 can be inserted to the slot 11 from the coil end side at one side in the axial direction of the stator core 1a (the A2 direction side) along the axial direction of the stator core 1a.
The amount of projection L2 of the bent portion 43 to the inside in the radial direction of the stator core 1a is the largest compared with the amount of projection L1 of the bent portion 35 of the U-phase coil 30 to the inside in the radial direction (see
The length L5 of the coupler 44 in the circumferential direction is the shortest compared with the length L4 of the coupler 36 of the U-phase coil 30 in the circumferential direction (see
As illustrated in
The W-phase coil 50 includes a pair of bent portions 54 and a coupler 55. The coupler 55 couples the pair of bent portions 54. The pair of bent portions 54 is bent in an approximately S shape to the inside in the radial direction at one side of the coil end (the A2 direction side). The W-phase coil 50 is bent to the radial direction of the stator core 1a along the direction that the flat conductive wire is laminated. The W-phase coil 50 is bent to have a different shape from the U-phase coil 30 and V-phase coil 40. The W-phase coil 50 is bent to the inside in the radial direction at the coil end at one side in the axial direction of the stator core 1a (the A2 direction side). Moreover, the W-phase coil 50 can be inserted to the slot 11 from the coil end side at one side in the axial direction of the stator core 1a (the A2 direction side) along the axial direction of the stator core 1a.
The amount of projection L3 of the bent portion 54 to the inside in the radial direction of the stator core 1a is larger than the amount of projection L1 of the bent portion 35 of the U-phase coil 30 to the inside in the radial direction (see
The bent portion 54 passes through the inside in the axial direction of the coupler 36 of the U-phase coil 30 without contacting the coupler 36. As illustrated in
The coupler 55 extends along the circumferential direction. The length L6 of the coupler 55 in the circumferential direction is shorter than the length L4 of the coupler 36 of the U-phase coil 30 in the circumferential direction (see
Thus, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are bent to the inside in the radial direction of the stator core 1a at the coil ends at one side in the axial direction of the stator core 1a. Furthermore, the coil end at the other side of the V-phase coil 40 extends along the axial direction of the stator core 1a. On the other hand, the U-phase coil 30 and the W-phase coil 50 are bent to the outside in the radial direction of the stator core 1a.
Next, with reference to
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
The length L11 of the first side 131 of the wound member for manufacturing a coil 130, the length L21 of the first side 141 of the wound member for manufacturing a coil 140, and the length L31 of the first side 151 of the wound member for manufacturing a coil 150 have the relationship of L11>L31>L21.
As illustrated in
As illustrated in
Next, a method for manufacturing the U-phase coil 30 will be described with reference to
First, as illustrated in
Next, as illustrated in
Then, the first side 131 and the second side 132 are pressed from the lateral sides of the first side 131 and the second side 132 (a S1 direction and a S2 direction). This curves the first side 131 and the second side 132 to be a convex shape to the outer peripheral side of the stator core 1a (the G2 direction). In view of this, as illustrated in
Next, a method for manufacturing the V-phase coil 40 will be described with reference to
First, as illustrated in
Then, the first side 141 and the second side 142 are pressed from the lateral sides of the first side 141 and the second side 142 (the S1 direction and the S2 direction). This curves the first side 141 and the second side 142 to be a convex shape to the outer peripheral side of the stator core 1a (the G2 direction). In view of this, as illustrated in
Next, a method for manufacturing the W-phase coil 50 will be described with reference to
First, as illustrated in
Next, as illustrated in
Then, the first side 151 and the second side 152 are pressed from the lateral sides of the first side 151 and the second side 152 (the S1 direction and the S2 direction). This curves the first side 151 and the second side 152 to be a convex shape to the outer peripheral side of the stator core 1a (the G2 direction). In view of this, as illustrated in
In the first embodiment, as described above, at least one of the first side 131 and the second side 132, which are the sides that become the end sides of the coil ends (the sides to be the end sides), is wrapped such that the side end 131a and/or the side end 132a at the outer peripheral side are/is shifted to the outer peripheral side. Accordingly, when the first side 131 and the second side 132 become the end sides of the coil ends (when bent), the side end(s) 131a and/or 132a at the outer peripheral side become/becomes an approximately flat surface. This reduces an increase in the length of the U-phase coil 30 in the radial direction, different from the case where the side ends 131a and/or 132a at the outer peripheral side after the end sides of the coil ends are formed are/is shifted to the inner peripheral side or the outer peripheral side.
In the first embodiment, as described above, the wound member for manufacturing a coil 130 is a strip-shaped edgewise coil around which the flat conductive wire is wrapped. Furthermore, at least one of the side end 131a and the side end 132a is shifted to the outer peripheral side. The side end 131a is at the outer peripheral side of the first side 131 that becomes the end side of the coil end. The side end 132a is at the outer peripheral side of the second side 132 that becomes the end side of the coil end. Thus, the U-phase coil 30 is configured with the edgewise coil. In view of this, the U-phase coil 30 can be disposed such that the slots 11 are formed with less gaps (a ratio of volume occupied by the slots 11 is increased). As a result, characteristics of the electric motor 100 (for example, torque) can be enhanced.
In the first embodiment, as described above, the wound member for manufacturing a coil 130 is employed for manufacturing the U-phase coil 30 for distributed winding to be distributed to and wound around a plurality of the slots 11. In the wound member for manufacturing a coil 130, at least one of the side end 131a, which is at the outer peripheral side of the first side 131 that becomes the end side of the coil end, and the side end 132a, which is at the outer peripheral side of the second side 132 that becomes the end side of the coil end, is shifted to the outer peripheral side. Thus, the U-phase coil 30 is wired in distributed winding. This allows bringing a form of magnetic field generated by the U-phase coil 30 close to a form of sine wave. Consequently, the characteristics of the electric motor 100 (for example, torque) can be enhanced in addition to reduction in torque pulsation.
In the first embodiment, as described above, the part of the first side 131 side of the wound member for manufacturing a coil 130 is bent once to the inner peripheral side of the stator core 1a. Thus, the first side 131 forms the end side of the coil end at the other side. The part of the second side 132 side of the wound member for manufacturing a coil 130 are bent multiple times to the outer peripheral side of the stator core 1a in the same direction. Thus, the second side 132 forms the end side of the coil end at the other side. Accordingly, even if the flat conductive wires are wrapped such that the side end 131a at the outer peripheral side of the first side 131 and the side end 132a at the outer peripheral side of the second side 132 are shifted to the outer peripheral side, the side end 131a at the outer peripheral side of the first side 131 and the side end 132a at the outer peripheral side of the second side 132 can be formed to be respective approximately flat surfaces after manufacturing the U-phase coil 30.
In the first embodiment, as described above, the side end 133a, which is at the outer peripheral side of the third side 133, and the side end 134a, which is at the outer peripheral side of the fourth side 134, form approximately flat surfaces. This ensures smooth insertion of the third side 133 and the fourth side 134 into the slot 11.
In the first embodiment, as described above, the first side 131, the second side 132, the third side 133, and the fourth side 134 of the wound member for manufacturing a coil 130 form an inverted approximately trapezoidal shape. Furthermore, the wound member for manufacturing a coil 130 is bent and configures the end sides of the coil ends. The wound member for manufacturing a coil 130 is wrapped such that at least one of the side end 131a and the side end 132a is shifted to the outer peripheral side. The side end 131a is the upper bottom at the outer peripheral side and the side end 132a is the lower bottom at the outer peripheral side of the wound member for manufacturing a coil 130 with the inverted approximately trapezoidal shape. Accordingly, the coupler 33 with the side ends at the outer peripheral side approximately flat surfaces can be easily formed with the second side 132 by bending the wound member for manufacturing a coil 130 to the inner peripheral side and the outer peripheral side. Therewith, the coupler 36 with the side ends at the outer peripheral side approximately flat surfaces can be easily formed with the first side 131.
Next, a description will be given of a constitution of an electric motor 400 with the second embodiment with reference to
As illustrated in
The coil for low/high speed 460 of the coil 401b is used for both in low-speed driving and high-speed driving of the electric motor 400. The coil for low speed 470 of the coil 401b is used in low-speed driving of the electric motor 400. A coupling state of these coils for low/high speed 460 and coil for low speed 470 can be switched with a coil switcher CS as illustrated in
Specifically, the electric motor 400 is coupled to a power supply BU and the coil switcher CS. The electric motor 400 is driven corresponding to a three-phase AC power supplied from the power supply BU.
The coil for low/high speed 460 and the coil for low speed 470 of each coil 401b are electrically coupled in series. Terminals TU1, TV1, and TW1 at one side of the coils for low/high speed 460 are coupled to the power supply BU. Terminals TU2, TV2, and TW2 at the other side of the coils for low/high speed 460 and at one side of the coils for low speed 470 are coupled to the coil switcher CS. Terminals TU3, TV3, and TW3 at the other side of the coils for low speed 470 are coupled to the coil switcher CS.
The coil switcher CS includes a switch for high speed SW1 and a switch for low speed SW2. The switch for high speed SW1 short-circuits the terminals TU2, TV2, and TW2 of the electric motor 400. The switch for low speed SW2 short-circuits the terminals TU3, TV3, and TW3 of the electric motor 400.
The coil switcher CS turns off the switch for high speed SW1 while turning on the switch for low speed SW2 in low speed driving. Consequently, the terminals TU3, TV3, and TW3 short-circuit. Then, a voltage is applied to both the coil for low/high speed 460 and the coil for low speed 470 in the coil 401b in each phase of the electric motor 400. This increases impedance of the coils 401b in each phase. Accordingly, a larger voltage can be applied to the coil 401b. As a result, torque of the electric motor 400 in low speed driving can be increased.
The coil switcher CS turns on the switch for high speed SW1 while turning off the switch for low speed SW2 in high speed driving. Consequently, the terminals TU2, TV2, and TW2 short-circuit. Then, a voltage is applied to the coil for low/high speed 460 in the coil 401b in each phase of the electric motor 400. This decreases impedance of the coils 401b in each phase compared with the impedance in low speed driving. As a result, the electric motor 400 can be driven at high speed.
Other configurations of the second embodiment are similar to those of the first embodiment.
Next, with reference to
As illustrated in
The part of a first side 511 side and the part of a second side 512 side of the wound member for manufacturing a coil 501 are bent, thus the end sides of the coil ends are formed. At least one of the first side 511 and the second side 512 is wrapped such that a side end 511a and/or a side end 512a at the outer peripheral side are/is shifted to the outer peripheral side. Accordingly, when the first side 511 and the second side 512 become the end sides of the coil ends (when bent), the side end 511a, which is at the outer peripheral side of the first side 511, and/or the side end 512a, which is at the outer peripheral side of the second side 512, become/becomes an approximately flat surface(s). The wound member for manufacturing a coil 501 for configuring the V-phase coil 40 and the W-phase coil 50 is configured such that the side end 511a at the outer peripheral side of the first side 511 and/or the side end 512a at the outer peripheral side of the second side 512 become/becomes approximately flat surface(s). The coil 401b is formed by the wound member for manufacturing a coil 501 by a manufacturing method similar to the manufacturing method for the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 of the first embodiment.
Therefore, the above-disclosed embodiments are all considered as illustrative and not restrictive. The scope of the disclosure is indicated by the appended claims rather than by the foregoing description. All variations falling within the equivalency range of the appended claims are intended to be embraced therein.
For example, the first and the second embodiments employ an electric motor as an example of a rotating electrical machine. However, the rotating electrical machine of this disclosure may be a rotating electrical machine other than the electric motor such as a generator.
In the examples shown in the first and the second embodiments, edgewise coils around which the flat conductive wires are wrapped and laminated are employed. However, the coil of this disclosure may be a coil formed by bundling round wires.
In the example shown in the first embodiment, the coil with the shape illustrated in
In the examples shown in the first and the second embodiments, the wound member for manufacturing a coil has an inverted approximately trapezoidal shape. However, it is only necessary that at least one of the first side and the second side, which become the end sides of the coil ends, be wrapped to be shifted to the outer peripheral side such that the side ends at the outer peripheral side become approximately flat surfaces when the first side and the second side become the end sides of the coil ends. Accordingly, the wound member for manufacturing a coil may have a shape other than the inverted approximately trapezoidal shape.
In the examples shown in the first and the second embodiments, the U-phase coil is formed by bending the wound member for manufacturing a coil once to the inner peripheral side and bending the wound member for manufacturing a coil twice to the outer peripheral side in the same direction. However, the U-phase coil may be formed by bending the wound member for manufacturing a coil once to the inner peripheral side in the same direction and bending the wound member for manufacturing a coil once to the outer peripheral side.
In the examples shown in the first and the second embodiments, both the first-side side part and the second-side side part of the wound member for manufacturing a coil are bent. However, the coil may be formed by bending one of the first-side side part and the second-side side part of the wound member for manufacturing a coil.
In the examples shown in the first and the second embodiments, the wound member for manufacturing a coil includes the strip-shaped edgewise coils around which the flat conductive wires are wrapped and laminated. However, to reduce the state of the flat conductive wires being wrapped to be released, for example, the flat conductive wire at each side of the wound member for manufacturing a coil may be bundled with a tape-shaped member. Alternatively, the flat conductive wires may be bonded by applying an adhesive material between the flat conductive wires.
In the example shown in the first embodiment, the first side is configured as the end side at one side of the coil end by bending the part of the first-side side of the wound member for manufacturing a coil once to the inner peripheral side of the stator core to the inner peripheral side. On the other hand, the second side is configured as the end side (U-phase coil) at the other side of the coil end by bending the wound member for manufacturing a coil twice to the outer peripheral side of the stator core in the same direction. However, the number of bending of the wound member for manufacturing a coil (the shape of the coil end) is not limited to this. For example, bending the part of the first-side side of the wound member for manufacturing a coil once to the inner peripheral side of the stator core may configure the first side as the end side of the coil end at one side. Then, bending the wound member for manufacturing a coil once to the outer peripheral side of the stator core or not bending the wound member for manufacturing a coil may configure the second side as the end side at the other side of the coil end.
In the example shown in the first embodiment, the projection height 112 of the coupler 42 of V-phase coil 40 from the core end face 1c is approximately equal to the projection height 113 of the coupler 53 of the W-phase coil 50 from the core end face 1c (H2=H3). However, the projection height of the coupler from the core end face 1c is not limited to this. For example, the projection height H3 of the coupler 53 of the W-phase coil 50 from the core end face 1c may be shorter than the projection height of the coupler 42 of V-phase coil 40 from the core end face 1c (H3<H2). Alternatively, the projection height H3 of the coupler 53 of the W-phase coil 50 from the core end face 1c may be taller than the projection height H2 of the coupler 42 of V-phase coil 40 from the core end face 1c (H3>H2).
In the example shown in the second embodiment, the coil for low/high speed and the coil for low speed are coupled in series (two in a series). Furthermore, four of the coils for low/high speed and the coils for low speed, which are coupled in series, are coupled in parallel in each phase. However, the number of coils coupled in series may be other than two, and the number of coils coupled in series of other than four may be coupled in parallel.
The wound member for manufacturing a coil, the coil, the rotating electrical machine, and the method for manufacturing a coil of this disclosure may be the following first to seventh wound members for manufacturing a coil, the first coil, the first rotating electrical machine, and the first method for manufacturing a coil.
The first wound member for manufacturing a coil is for manufacturing a coil wound around a slot of a stator core. The wound member for manufacturing a coil includes a first side, a second side, a third side, and a fourth side. The second side and the first side oppose one another. The third side and the fourth side couple the first side and the second side. At least one of the first side and the second side is to be an end side of a coil end by bending at least one of a part of the first-side side and a part of the second-side side of the wound member for manufacturing a coil. At least one of the first side and the second side to be the end side of the coil end is wrapped such that a side end at an outer peripheral side is shifted to an outer peripheral side to form a side end at an outer peripheral side to be an approximately flat surface after the end sides of the coil ends are configured.
In the first wound member for manufacturing a coil, the second wound member for manufacturing a coil is configured as follows. A strip-shaped edgewise coil is configured by wrapping and laminating a flat conductive wire such that the side ends at an outer peripheral side of at least one of the first side and the second side to be an end side of the coil end is shifted to an outer peripheral side.
In the first or the second wound member for manufacturing a coil, the third wound member for manufacturing a coil is configured as follows. At least one of the side end at an outer peripheral side of the first side and the second side to be an end side of the coil end for manufacturing a coil for distributed winding to be distributed to and wound around a plurality of the slots is configured so as to be shifted to the outer peripheral side.
In any of the first to the third wound members for manufacturing a coil, the fourth wound member for manufacturing a coil is configured as follows. The first side is to be an end side at one side of the coil end by bending a part of the first-side side of the wound member for manufacturing a coil once to an inner peripheral side of the stator core. The second side is to be an end side at another side of the coil end by bending a part of the second-side side of the wound member for manufacturing a coil multiple times to an outer peripheral side of the stator core in the same direction.
In any of the first to the fourth wound members for manufacturing a coil, the fifth wound member for manufacturing a coil is configured as follows. Side ends at an outer peripheral side of the third side and the fourth side are configured to be approximately flat surfaces.
In any of the first to the fifth wound members for manufacturing a coil, the sixth wound member for manufacturing a coil is configured as follows. The first side, the second side, the third side, and the fourth side constitute an inverted approximately trapezoidal shape. A side end at an outer peripheral side of at least one of an upper bottom at an upper side of the inverted approximately trapezoidal shape and a lower bottom at a lower side of the inverted approximately trapezoidal shape is wrapped to be shifted to an outer peripheral side. The side ends constitute end sides of the coil ends by bending the wound member for manufacturing a coil.
In any of the first to the sixth wound members for manufacturing a coil, the seventh wound member for manufacturing a coil is configured as follows. The first side is to be an end side at the one side of the coil end disposed at an inner peripheral side of the stator core by bending a part of the first-side side of the wound member for manufacturing a coil equal to or more than once to an inner peripheral side of the stator core. The second side is to be an end side at the other side of the coil end disposed at an outer peripheral side of the stator core by bending a part of the second-side side of the wound member for manufacturing a coil equal to or more than once to an outer peripheral side of the stator core or not bending the part.
The first coil is wound around a slot of a stator core. The first coil includes a first side, a second side, a third side, and a fourth side. The second side and the first side oppose one another. The third side and the fourth side couple the first side and the second side. At least one of a part of the first-side side and a part of the second-side side of the wound member for manufacturing a coil where at least one of the first side and the second side is wrapped such that the side end at the outer peripheral side is shifted to an outer peripheral side is bent. Accordingly, at least one of the first side and the second side becomes an end side of a coil end with a side end at an outer peripheral side of an approximately flat surface.
The first rotating electrical machine includes a stator core and a coil. The coil is wound around a slot of the stator core. The coil includes a first side, a second side, a third side, and a fourth side. The second side and the first side oppose one another. The third side and the fourth side couple the first side and the second side. At least one of a part of the first-side side and a part of the second-side side of the wound member for manufacturing a coil where at least one of the first side and the second side is wrapped such that the side end at the outer peripheral side is shifted to an outer peripheral side is bent. Accordingly, at least one of the first side and the second side becomes an end side of a coil end with a side end at an outer peripheral side of an approximately flat surface.
The method for manufacturing the first coil is a method for manufacturing a coil wound around a slot of a stator core. The method includes preparing a wound member for manufacturing a coil and forming an end side of a coil end. The preparing prepares a wound member for manufacturing a coil that includes a first side, a second side, a third side, and a fourth side. The first side and the second side oppose one another. The third side and the fourth side couple the first side and the second side. At least one of the first side and the second side is wrapped such that side end at an outer peripheral side is shifted to an outer peripheral side. The forming forms an end side of a coil end with a side end at an outer peripheral side of approximately flat surface in at least one of the first side and the second side. The end side is formed by bending at least one of a part of the first-side side and a part of the second-side side of the wound member for manufacturing a coil.
The foregoing detailed description has been presented for the purposes of illustration and description. Many modifications and variations are possible in light of the above teaching. It is not intended to be exhaustive or to limit the subject matter described herein to the precise form disclosed. Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims appended hereto.
Number | Date | Country | Kind |
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2013-056296 | Mar 2013 | JP | national |