JP2013223288A - Coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil which can be easily deformed more easily than conventional one.SOLUTION: A coil 10 fits into a tooth of a rotary electric machine. The coil 10 comprises a multilayer winding including: inner periphery windings 12(2), 12(3), 12(6), 12(7); and outer periphery windings 12(1), 12(4), 12(5), 12(8) which are wound around outer boundary of the inner periphery windings. The multilayer winding is formed in a multistage way to be a shape arranged along the tooth, and the shape is deformed when fitting into the tooth. A gap 16 is provided between the inner periphery windings 12(2), 12(3), 12(6), 12(7) and the outer periphery windings 12(1), 12(4), 12(5), 12(8) to secure the movement of the inner periphery windings into the outer periphery windings side during the deformation.

Description

  The present invention relates to a coil, and more particularly to a coil assembled to a tooth of a rotating electrical machine.

  Conventionally, a coil for concentrated winding, which is formed in a shape along a tooth, is known as a coil to be assembled to a tooth of a rotating electrical machine. When assembling, the coil is inserted into the teeth.

  The teeth are provided on the stator core of the rotating electrical machine. The stator core has a cylindrical shape with a hollow portion, and the teeth extend from the inner peripheral surface of the stator core toward the central axis. The teeth have a shape that tapers toward the central axis, and the teeth have a trapezoidal shape when viewed from the end face of the stator core. A plurality of teeth are formed around the stator core.

  In order to correspond to the shape of the teeth, the coil is also formed in a trapezoidal shape. In this case, when the coil is assembled to each tooth, it may be difficult to insert the last coil. That is, as shown in FIG. 3, when assembling N coils to N teeth, a gap L1 (opening) between the first coil 100 (1) and the last coil 100 (N-1) from the last. Width) becomes narrower than the uppermost width L2 (outer width) of the last coil 100 (N), and if the shape is unchanged, the last coil 100 (N) may not be inserted into the tooth 102. . Therefore, in Patent Document 1, as shown in FIG. 4, after the last coil 100 (N) is deformed, the coil 100 (N) is inserted into the teeth 102.

  In addition, as a coil for concentrated winding, instead of a so-called single layer coil as shown in FIGS. 3 and 4, it is wound around the inner circumference winding and the outer circumference of the inner circumference winding as shown in FIG. In some cases, a multi-layer winding coil is used in which multi-layer windings having outer peripheral windings are assembled in multiple stages.

JP 2008-220093 A

  By the way, when assembling the multilayer wound coil to the teeth, it may be difficult to deform the multilayer wound coil. For example, as shown in FIG. 5, consider a case where the inclination angle formed by the steps of the multi-layered wound coil 104 is changed from θ1 to θ2. In FIG. 5, the Nth winding 110 is represented by 110 (+ N) and 110 (−N). For example, the first winding is indicated by 110 (+1) and 110 (-1). Further,-indicates a winding extending from the paper surface to the back, and + indicates a winding extending from the paper surface to the near side. Further, in FIG. 5, for simplification, only windings extending from + to − are illustrated, and windings extending from − to + are not illustrated.

  If the winding side of the first turn is the upper stage and the winding side of the eighth turn is the lower stage, as shown in FIG. 6, the movement amount of the winding accompanying the deformation increases as the lower stage (D1 <D2 <D3). Further, as the right winding in FIG. 6 moves, the winding connected to the winding also moves. For example, when the winding 110 (−8) is moved by D3, the winding 110 (+8) and the winding 110 (+7) connected to the winding 110 (−8) are also moved by D3. Further, the winding 110 (-7) adjacent to the winding 110 (-8) is also pushed by the winding 110 (-8) and moves by D3. As a result, the winding 110 (+6) connected to the winding 110 (−7) moves by D3.

  Further, as the winding 110 (−5) is moved by D2, the winding 110 (+5) connected to the winding 110 (−5) is also moved by D2. At this time, the movement amount of the winding 110 (+5) that is the outer winding is D2, and the movement amount of the winding 110 (+6) that is the inner winding is D3. Since D2 <D3, the movement of the winding 110 (+6) is interfered with the winding 110 (+5). As a result of interference with the movement of the windings, it may be difficult to deform the multilayer wound coil.

  The present invention relates to a coil assembled to a tooth of a rotating electrical machine. The coil is formed in multiple stages so that a multilayer winding including an inner circumferential winding and an outer circumferential winding wound around the outer circumferential winding is formed in a shape along the teeth. At the time of assembling, the shape is deformed. Further, a gap is provided between the inner peripheral winding and the outer peripheral winding to ensure movement of the inner peripheral winding toward the outer peripheral winding during the deformation.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide a coil whose deformation | transformation is easier than before.

It is sectional drawing of the coil which concerns on this Embodiment. It is sectional drawing of the coil which concerns on this Embodiment. It is a figure explaining the assembly | attachment process of the coil to teeth. It is a figure explaining the assembly | attachment process of the coil to teeth. It is a figure explaining the deformation process of a coil. It is a figure explaining the deformation process of a coil.

  FIG. 1 illustrates a coil 10 according to the present embodiment. The coil 10 has a multilayer winding structure including an inner peripheral winding and an outer peripheral winding wound around the outer periphery of the inner peripheral winding. Furthermore, the coil 10 has a multi-stage structure in which the multilayer winding structure is assembled into a plurality of stages.

  1 and 2, the cross section of the Nth winding 12 is represented by 12 (+ N) and 12 (−N). For example, the windings for the first turn are indicated by 12 (+1) and 12 (-1). Further,-indicates a winding extending from the paper surface to the back, and + indicates a winding extending from the paper surface to the near side. Further, windings (crossover wires) from a predetermined cross section to the next cross section are indicated by solid lines. Further, in FIGS. 1 and 2, only the crossover line from + to − is shown for simplification, and the crossover line from − to + is not shown.

  Further, it is assumed that the number of steps of the coil 10 increases from the upper step to the lower step. For example, the windings 12 (−1), 12 (+1), 12 (−2), and 12 (+2) have the first stage, and the windings 12 (−7), 12 (+7), and 12 (− Steps 8) and 12 (+8) are the fourth step.

  The coil 10 may have a shape along the teeth of a rotating electric machine (not shown). Specifically, it may be a tapered shape in which the windings at each stage are wound in a substantially rectangular shape and the rectangular shape becomes smaller as the number of stages is increased.

  The winding of the coil 10 may be a so-called flat wire. Alternatively, the coil 10 may be formed by winding a single winding. Further, the winding order of the inner peripheral winding and the outer peripheral winding may be different at each stage. For example, the first and third stages may be wound with the inner winding after winding the outer winding, and the second and fourth stages may be wound with the outer winding after winding the inner winding. You may make it wind.

  The coil 10 may be deformable when inserted into the tooth. For example, when N coils 10 are inserted into N teeth, the last inserted coil 10 may be deformed and inserted into the teeth. Specifically, as shown in FIG. 1, the inclination angle θ <b> 1 composed of the steps of each step on the right side of the sheet may be modified to be θ <b> 2.

  Here, in order to ensure the movement of the inner peripheral winding toward the outer peripheral winding during the above deformation, a gap 16 is provided between the inner peripheral winding and the outer peripheral winding. For example, the coil 10 provided with the gap 16 can be manufactured by giving a command for providing the gap 16 to a program for operating the winding machine for forming the coil 10. The width a of the gap 16 between the outer winding and the inner winding may be a width that allows the inner winding to move without interfering with the outer winding when the coil 10 is deformed.

  FIG. 2 illustrates the coil 10 during deformation. The outermost winding 12 (−8) at the lowermost stage on the right side of the drawing moves by D3 when deformed. Accordingly, the winding 12 (+7) and the winding 12 (+8) connected to the winding 12 (−8) also move by D3.

  Further, the winding 12 (-7) adjacent to the winding 12 (-8) is pushed by the winding 12 (-8) and moves. Specifically, an amount D3-a obtained by subtracting the width a of the gap 16 from the amount of movement D3 of the winding 12 (-8) is the amount of movement of the winding 12 (-7). Furthermore, with the movement of the winding 12 (−7), the winding 12 (+6) connected to the winding 12 (−7) moves by the same D3-a as the winding 12 (−7).

  Further, the outer winding 12 (−5) at the third stage on the right side of the drawing moves by D2 during deformation. Along with this, the winding 12 (+5) connected to the winding 12 (−5) moves by D2.

  Here, paying attention to the third stage, the movement amount of the winding 12 (+6) that is the inner winding is D3-a, and the movement amount of the winding 12 (+5) that is the outer winding is D2. In order to allow the winding 12 (+6) to move only by D3-a without interfering with the winding 12 (+5), the amount of movement of each of the winding 12 (+5) and the winding 12 (+6), The width a of the gap 16 only needs to satisfy the relational expression of (D3-a) −D2 ≦ a. From the above relational expression, the width a of the gap 16 may be (D3-D2) / 2 or more.

  As the winding 12 (−5) moves, not only the winding 12 (+5) but also the winding 12 (+4) moves by D2. Further, the winding 12 (−4) at the second stage on the right side of the drawing moves by D1 during deformation. As a result, the winding 12 (+3) connected to the winding 12 (−4) moves by D1.

  Here, paying attention to the second stage, the movement amount of the winding 12 (+4) that is the outer winding is D2, and the movement amount of the winding 12 (+3) that is the inner winding is D1. Since D1 <D2, it is avoided for this stage that the movement of the inner winding is interfered with by the outer winding.

  Further, with the movement of the winding 12 (-4), the adjacent winding 12 (-3) is pushed and moved by the winding 12 (-4). Specifically, an amount D1-a obtained by subtracting the width a of the gap 16 from the moving amount D1 of the winding 12 (-4) is the moving amount of the winding 12 (-3). Further, as the winding 12 (-3) moves, the winding 12 (+2) connected to the winding 12 (-3) moves by the same D1-a as the winding 12 (-3).

  In the first stage, since the winding 12 (-1), which is the outer winding on the right side of the drawing, does not move, the winding 12 (+1) and the winding 12 (-1) connected to the winding 12 (-1). Winding 12 (-2) adjacent to) hardly moves

  Here, paying attention to the first stage, the movement amount of the winding 12 (+1) that is the outer winding is 0, and the movement amount of the winding 12 (+2) that is the inner winding is D1-a. In order to allow the winding 12 (+2) to move by D1-a without interfering with the winding 12 (+1), the amount of movement of the winding 12 (+2) and the width a of the gap 16 are (D1 As long as the relational expression -a) ≦ a is satisfied. From the above relational expression, the width a of the gap 16 may be D1 / 2 or more.

  From the above, the width a of the gap 16 is determined so that the condition a ≧ D1 / 2 of the gap 16 in the first stage and the condition a ≧ (D3-D2) / 2 of the gap 16 in the third stage are simultaneously satisfied. It is preferred that

  In the above-described embodiment, the gap 16 is provided in the inner and outer windings of all stages, but the present invention is not limited to this configuration. The gap 16 may be provided only in a stage where the movement of the inner winding may be interfered by the outer winding. For example, the gap 16 may be provided only in the first and third stages. Thus, by providing the gap 16 selectively, the possibility that adjacent coils 10 come into contact with each other after the coil 10 is assembled to the teeth is reduced.

  That is, when the coil 10 is assembled to the tooth, the lowermost stage of the coil 10 (fourth stage in FIG. 2) has a smaller interval between the adjacent coils 10 than the other stages. By not providing the gap 16 in the lowermost winding, the width of the outermost winding 12 (8) can be reduced. As a result, it is possible to prevent contact between adjacent coils 10. In this way, in order to selectively provide the gap 16, for example, a program that specifies the width a of the gap 16 for each stage may be given to the winding machine that forms the coil 10.

  10 coils, 12 windings, 16 gaps.

Claims (1)

A coil assembled to the teeth of a rotating electric machine,
A multi-layer winding including an inner winding and an outer winding wound around the outer circumference of the inner winding is formed in multiple stages so as to have a shape along the teeth, and when assembled to the teeth The shape is deformed,
A gap is provided between the inner peripheral winding and the outer peripheral winding to ensure the movement of the inner peripheral winding toward the outer peripheral winding during the deformation. To the coil.

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