JP2010154619A - Manufacturing method of armature and armature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an armature, which reduces the number of coil connecting points at longitudinal both ends of a core even if a distributed winding is employed, in the method for manufacturing the armature by using the substantially rectangular parallelepiped core, and by molding the armature into a cylindrical shape after winding a coil around the core. <P>SOLUTION: The manufacturing method of the armature 1 has: a winding process in which a plurality of slots S are wound with the coil 3 in a wave winding manner so that the coil 3 of each phase is cut at longitudinal L-both ends of the core 2 by using the substantially rectangular parallelepiped core 2 which is formed at one face of one of the plurality of slots S which extends to the other end 26 from one end 25 in the width direction W; a molding process at which the core 2 is bent to be formed into the cylindrical shape so that both the ends 23, 24 in longitudinal directions L abut on each other after the winding process; and a connecting process at which cut parts 33 being portions to be cut are electrically connected to each other so that a clearance between a connecting end 31 connected to the outside and a neutral point 32 becomes conductive with respect to the coil 3 of each phase. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an armature used for a rotating electrical machine and a manufacturing method thereof, and more particularly, to an armature manufacturing method and a manufacturing method thereof in which a coil is wound around a substantially rectangular parallelepiped core and then the core is formed into a cylindrical shape. The manufactured armature.

  A method of manufacturing an armature by using a substantially rectangular parallelepiped core, winding a coil around the core, and then forming it into a cylindrical shape is already known (for example, Patent Documents 1 and 2 below). Such an armature manufacturing method is advantageous in that the coil can be easily wound and the occupancy rate of the conductor in the slot can be increased as compared with the method in which the coil is wound around the cylindrical core. is there.

JP 48-009201 A JP 2001-186728 A

  However, when such an armature manufacturing method is adopted, connection of coils at both ends of the substantially rectangular parallelepiped core becomes a problem. That is, in a substantially rectangular parallelepiped core, the direction that becomes the circumferential direction after being formed into a cylindrical shape is defined as the length direction, and the direction that is orthogonal to the length direction and that is formed into the cylindrical shape and then becomes the axial direction is defined as the width. In this armature manufacturing method, both ends in the longitudinal direction of the core are continuously in contact with each other after being formed into a cylindrical shape. This is performed in a state where both ends in the longitudinal direction are physically separated before being formed into a sheet. Therefore, it is necessary to devise to ensure the continuity of the coil between the slots located at both ends in the length direction of the core. However, in Patent Documents 1 and 2, the length direction of such a core is described. Nothing is disclosed regarding the connection of the coils between the slots on both ends.

  By the way, in order to ensure the connection of the coil between the slots on both ends in the length direction of the substantially rectangular parallelepiped core, for example, the following two methods are conceivable. In the first method, without cutting the coil at both ends in the length direction of the core, the slot on the one end side in the length direction of the core that is physically separated from the slot on the other end side in the length direction, This is a method of winding a coil by connecting continuous wires as in the case of ordinary slots. In the second method, the coil is wound around the core so that the coil is cut at both ends in the longitudinal direction of the core, and the core is formed into a cylindrical shape, and then the coil is cut. This is a method of electrically connecting the cut portions. In the first method, after the core is formed into a cylindrical shape, a portion of the conductor connecting the slot on one end side in the length direction of the core to the slot on the other end side in the length direction is left, so that the conductor of the coil There is a problem that the length becomes longer than necessary, and an extra space for accommodating the extra conductor is required. On the other hand, in the second method, the problem of the first method does not occur, but since it is necessary to connect the cutting part of the coil, depending on how the coil is wound, the number of connection points becomes very large, There is a problem that manufacturability deteriorates. In particular, when using distributed winding as the winding method of the coil, the number of conductors connecting the slots is uniform overall, unlike the case of using concentrated winding. easy.

  The present invention has been made in view of the above problems, and an object of the present invention is to use a substantially rectangular parallelepiped core, wind a coil around the core, and then form a cylindrical shape to produce an armature. The present invention also provides an armature manufacturing method and an armature that can suppress the number of coil connection locations at both ends in the length direction of the core even when distributed winding is employed.

  In order to achieve the above object, the characteristic configuration of the armature manufacturing method according to the present invention includes a substantially rectangular parallelepiped core in which a plurality of slots extending from one end in the width direction to the other end are formed on one surface. A winding step of winding the coils in the plurality of slots by wave winding so that the coils of each phase are cut at both longitudinal ends of the core; and after the winding step A molding step in which the core is bent so that both ends in the lengthwise direction are in contact with each other, and after the molding step, the coil of each phase is neutralized from a connection end point connected to the outside And a connecting step of electrically connecting the cut portion, which is the cut portion, so as to conduct to a point.

  According to this characteristic configuration, since the coils are wound around the core so that the coils of each phase are cut at both ends in the length direction of the substantially rectangular parallelepiped core, the slots on both ends in the length direction of the core Compared to the case where continuous conductors are connected between the coils, the coil conductor length can be shortened, and the space for accommodating excess conductors after forming the core into a cylindrical shape is not required, so the armature is enlarged. Can also be suppressed. In addition, according to this characteristic configuration, the coils of each phase are wound by the wave winding on the plurality of slots of the substantially rectangular parallelepiped core, so that the slots are connected as compared with the case where the coils are wound by the lap winding. The number of conducting wires can be reduced. Therefore, even when the distributed winding is adopted as the winding method of the coil, the number of connection portions of the coil cutting portions at both ends in the length direction of the core can be suppressed.

  Here, it is preferable that either the connection end point or the coil side closest to the neutral point in the coil of each phase is inserted into both of the two slots closest to both ends in the length direction of the core. It is.

  According to this configuration, both the one end slot closest to the one end in the length direction of the core and the other end slot closest to the other end in the length direction of the core are inserted into both of the two slots. One end of the coil side is a connection end point or neutral point that does not need to be connected to the coil side of the same phase inserted in the other slot. Therefore, it is possible to further reduce the number of conductive wires connecting between the slot on one end side in the length direction of the core and the slot on the other end side in the length direction, and cut portions of the coil at both ends in the length direction of the core. The number of connection points can be further reduced.

  The armature includes the first phase, second phase, and third phase coils. In the winding step, the first phase coil includes the connection end point and the neutral point. The coil side closest to one of the cores is inserted into the one end slot closest to the one end in the length direction of the core, and the coil side is also inserted into the slot adjacent to the one end slot. The coil is inserted into the other end slot closest to the other end in the length direction of the core, and the coil side closest to one of the connection end point and the neutral point is also inserted into the slot adjacent to the other end slot. Coil sides are inserted, and in the first phase, second phase, and third phase coils, the connection end point and the neutral point are located on one side in the width direction of the core, and the first phase and the first phase In the three-phase coil, the cutting part is the core Located in one side direction, the coil of the second phase, it is preferable that the cutting portion is wound so as to be located the other side in the widthwise direction of the core.

  According to this configuration, when the armature includes a three-phase coil, the coil side closest to one of the connection end point and the neutral point of the first phase coil is inserted into one end slot of the core, and the core The coil side closest to one of the connection end point and the neutral point of the third phase coil is inserted into the other end slot. That is, for both of the two slots closest to both ends in the length direction of the core, one end of the coil side inserted into the slot needs to be connected to the coil side of the same phase inserted into the other slot. The connection end point or neutral point without any Therefore, it is possible to further reduce the number of conductive wires connecting between the slot on one end side in the length direction of the core and the slot on the other end side in the length direction, and cut portions of the coil at both ends in the length direction of the core. The number of connection points can be further reduced. In addition, since the connection end point and the neutral point are arranged on one side in the width direction of the core for all of the three-phase coils, the configuration for connection between the connection end point of each phase and the outside and the connection between the neutral points Can be simplified.

  In the above configuration, the coil of the second phase is such that the coil side closest to one of the connection end point and the neutral point is a second slot from the one end slot to the other side in the length direction of the core. And a coil side is also inserted into the third slot from the one end slot to the other side in the lengthwise direction of the core, or the connection end point and the neutral point are The coil side closest to the other is inserted into the third slot from the other end slot to one side in the length direction of the core, and the second coil side from the other end slot to the one side in the length direction of the core. It is preferable that the coil is wound so that the coil side is also inserted into the slot.

  According to these configurations, the second-phase coil can be appropriately wound around the core.

  Further, it is preferable that the coils of each phase have n layer windings (n is a natural number), and n coil sides are inserted into the slots in the winding step.

  According to this configuration, it is possible to appropriately manufacture an armature in which the coil has an n-layer winding.

  Further, it is preferable that the core is configured by laminating a plurality of belt-like magnetic plates.

  According to this configuration, a complex core shape having a plurality of slots can be easily formed on the belt-shaped magnetic plate by a relatively simple processing method such as press punching, and excellent as an armature core. It is possible to have a characteristic. In addition, the material can be used more effectively than when a ring-shaped magnetic plate is formed by press punching.

  In addition, it is preferable to further include a pressing step of pressing the core in the width direction after the molding step.

  According to this structure, the laminated | stacked several strip | belt-shaped magnetic board can be stuck closely. Further, according to the configuration of the present invention, since the number of conductive wires connecting between the slots is small as described above and the coil end portion of the armature can be reduced, the pressing process can be easily performed. .

  The characteristic configuration of the armature according to the present invention uses a substantially rectangular parallelepiped core in which a plurality of slots extending from one end in the width direction to the other end are formed on one surface, and both ends in the length direction abut each other. A cylindrical core formed by bending the core so as to be in contact with the cylindrical core and being cut at both ends in the longitudinal direction of the core, and wound around the plurality of slots by wave winding, and externally And a coil of each phase formed by electrically connecting the cut portions, which are the cut portions, so as to conduct from the connection end point to the neutral point.

  According to this characteristic configuration, the coils wound around the core in a state where the coils of the respective phases are cut at both ends in the length direction of the substantially rectangular parallelepiped core are connected by the cut portions which are the cut portions. Therefore, the coil conductor length can be shortened compared to the case where the slots on both ends in the length direction of the substantially rectangular parallelepiped core are connected by the continuous conductor wire, and the remainder is left after the core is formed into a cylindrical shape. Since the space for accommodating the conducting wire is also unnecessary, it is possible to suppress the armature from becoming large. In addition, according to this characteristic configuration, the coils of each phase are wound by the wave winding on the plurality of slots of the substantially rectangular parallelepiped core, so that the slots are connected as compared with the case where the coils are wound by the lap winding. The number of conducting wires can be reduced. Therefore, even when distributed winding is adopted as the winding method of the coil, the number of connecting portions of the coil cutting portions at both ends in the length direction of the core can be reduced, and an armature with good manufacturability can be obtained. .

  Here, it is preferable that either the connection end point or the coil side closest to the neutral point in the coil of each phase is inserted into both of the two slots closest to both ends in the length direction of the core. is there.

  According to this configuration, both of the one end slot closest to the one end in the length direction of the substantially rectangular parallelepiped core and the other end slot closest to the other end in the length direction of the core are the two slots. One end of the coil side inserted in both sides is a connection end point or neutral point that does not need to be connected to the coil side of the same phase inserted in the other slot. Accordingly, it is possible to further reduce the number of conductive wires connecting the slot on the one end side in the length direction of the substantially rectangular parallelepiped core and the slot on the other end side in the length direction, and the coils at both ends in the length direction of the core. It is possible to further reduce the number of connection portions of the cutting portion.

1. First Embodiment A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an overall configuration of an armature 1 according to the present embodiment. In this embodiment, the case where the armature 1 is comprised as a stator of a rotary electric machine is demonstrated as an example. Here, the “rotary electric machine” is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary. As shown in FIG. 1, the armature 1 is finally formed in a cylindrical shape centered on the axis X. FIG. 2 is a perspective view showing a configuration of a substantially rectangular parallelepiped stator core 2 (hereinafter simply referred to as “core 2”) before being formed into a cylindrical shape by a forming step. 3 to 6 are diagrams for explaining each step of the method of manufacturing the armature 1 according to the present embodiment. The present invention is characterized by the method of manufacturing the armature 1, and particularly has a feature in the winding structure of the coil 3 around the substantially rectangular parallelepiped core 2 as shown in FIG. 2. Hereinafter, the manufacturing method of this armature 1 and the structure of each part are demonstrated in detail.

1-1. Configuration of Rotating Electric Machine In this embodiment, the rotating electric machine is a synchronous machine (synchronous motor, synchronous generator) that functions as a motor and a generator that input and output a three-phase alternating current of U phase, V phase, and W phase. . In the present embodiment, the U phase corresponds to the first phase in the present invention, the V phase corresponds to the second phase in the present invention, and the W phase corresponds to the third phase in the present invention. Although illustration is omitted, a rotor is rotatably supported inside the armature 1 as a stator shown in FIG. 1, and an inner rotor type rotating field type rotating electric machine is configured. The rotor includes a rotor core and a magnet. And the magnet comprised by a permanent magnet or an electromagnet is arrange | positioned near the outer peripheral part of a rotor core. Thereby, the rotor functions as a field. In this example, the number of poles of the rotor as the field is “4”. The structure of the armature 1 as a stator will be described below together with the manufacturing method.

1-2. Next, a method of manufacturing the armature 1 according to the present embodiment will be described in order with reference to FIGS. At this time, the configuration of each part of the armature 1 will also be described. In the following description, each direction of the armature 1 will be described with reference to the direction of the rectangular parallelepiped core 2. Here, as shown in FIG. 1, the circumferential direction after the core 2 is formed into a cylindrical shape (the longitudinal direction of the substantially rectangular parallelepiped core 2) is the length direction L, and the opening side of the slot S in FIG. When viewed from the left side, the length direction is one La, and the right side is the other length direction Lb. In addition, the direction (the height direction in FIG. 2) that becomes the axis X direction after the core 2 is formed into a cylindrical shape is the width direction W, the upper side in FIG. 2 is the one width direction Wa, and the lower side is the other width direction Wb. . Further, the direction (the depth direction of the slot S) that becomes the radial direction after the core 2 is formed into a cylindrical shape is defined as the thickness direction T, and the front side that is the slot forming surface 21 in which the slot S is formed (formed into a cylindrical shape). The inner peripheral surface side) after this is defined as Ta in the thickness direction, and the back surface 22 side where the slot S is not formed (the outer peripheral surface side after being formed into a cylindrical shape) is defined as the other thickness direction Tb. Here, the length direction L, the width direction W, and the thickness direction T are orthogonal to each other.

  As described above, the armature 1 according to the present embodiment uses the substantially rectangular parallelepiped core 2 as shown in FIG. The slot forming surface 21 on the front surface of the core 2 has a plurality of slots extending from one end 25 in the width direction, which is the end of one Wa in the width direction, to the other end 26 in the width, which is the end of the other Wb. S is formed. Thereby, teeth are formed between adjacent slots S. The slot forming surface 21 becomes an inner peripheral surface of the core 2 after the core 2 is formed into a cylindrical shape. Each slot S is a groove having a rectangular cross section that extends in a direction parallel to the width direction W of the core 2 (the axis X direction after the core 2 is formed into a cylindrical shape), and a plurality of slots S are provided at regular intervals in the length direction L. ing. Each slot S has the same cross-sectional shape, and has a predetermined depth in the thickness direction T from the slot forming surface 21 and a predetermined width in the length direction L. Here, the width of the opening of the slot S on the slot forming surface 21 is narrower than the width of the portion on the other Tb side in the thickness direction. Accordingly, each tooth is a protrusion that protrudes toward the Ta side in the thickness direction of the core 2, and the tip end portion (the end portion of the Ta in the thickness direction) is a slightly wider locking portion. The locking portion functions to hold the coil 3 in the slot S. As will be described later, in the present embodiment, the number of slots corresponding to each pole is set to “2”, and three U-phase, V-phase, and W-phase slots are sequentially and repeatedly arranged two for each phase. The As described above, the number of poles of the rotor is “4”. Therefore, the total number of slots formed in the core 2 is “24”.

  A fixing portion 27 for fixing the armature 1 as a stator to a case or the like is formed on the back surface 22 side of the core 2. The fixing portion 27 is a convex portion extending in the width direction W, and an insertion hole for inserting a fastening member such as a bolt penetrates from the one end portion 25 in the width direction of the core 2 to the other end portion 26 in the width direction. It is formed as follows. In the illustrated example, the fixing portions 27 are provided at three locations in the length direction L of the core 2. In the present embodiment, the core 2 is configured by laminating a plurality of strip-like magnetic plates. As such a strip-shaped magnetic plate, for example, a silicon steel plate having a thickness of about 0.3 to 0.5 mm is used. Each strip-shaped magnetic plate is configured by forming a plurality of slots S, fixing portions 27, and the like by performing press punching or the like on the strip-shaped magnetic metal material.

  Then, as shown in FIG. 3, first, an insulating sheet inserting step for inserting the insulating sheet 28 into each slot S is performed on such a core 2. Here, the insulating sheet 28 is disposed so as to cover the entire inner surface of each slot S. As this insulating sheet 28, for example, a sheet formed of a material having high electrical insulation and heat resistance such as a laminate of aramid fiber and polyethylene terephthalate can be used.

  Next, a winding step of winding the coil 3 around the plurality of slots S of the core 2 is performed. At this time, as shown in FIGS. 4 and 5, the coils 3 are wave-wound in a plurality of slots S so that the coils 3 of each phase are cut at both ends in the length direction L of the core 2. Wrap it. In the present embodiment, since it is a three-phase AC rotating electric machine, the armature 1 has a three-phase coil 3 including a U-phase coil 3U, a V-phase coil 3V, and a W-phase coil 3W. In the description of the present embodiment, the term “coil 3”, “connection end point 31”, “neutral point 32”, “cutting portion 33”, “coil side 34”, and “coil end portion 35” are simply used. , U phase, V phase, and W phase, the respective members or portions of the three phases are used as generic names. Here, the coil side 34 of the coil 3 of each phase is formed by linearly forming a conductive wire constituting the coil 3, and in this example, a plurality of conductive wires are bundled. In addition, the coil end 35 of each phase of the coil 3 is constituted by a conductive wire continuing from the coil side 34 so as to connect between either end in the width direction W of the two coil sides 34. In the same manner as above, a plurality of conductive wires are bundled.

  As shown in FIG. 4, the coil 3 of each phase is a die-coil coil that is preliminarily molded into a predetermined shape before being wound around the core 2. Here, since the coil 3 is wound around the core 2 by wave winding, it is formed in a waveform in advance. More specifically, the die-wound coil has a plurality of linear coil sides 34 extending in the width direction W, and the length direction between the ends of one side Wa of the coil side 34 and the end of the other side Wb. A plurality of coil end portions 35 alternately connected to L are formed in a rectangular wave shape. In the present embodiment, since the number of slots corresponding to each pole is “2”, the coil 3 of each phase has a plurality of coil sides 34 inserted into one of the two slots of the same phase adjacent to each other. Two die-coil coils, a first die-coil coil having a waveform connected to each other and a second die-coil coil having a waveform joining two or more coil sides 34 inserted into the other of the two slots of the same phase. Is an integrated configuration. Specifically, the two corrugated coiled coils are arranged so as to be shifted from each other by one slot S in the length direction L, and the coil end portions 35 are integrally fixed at a portion where they overlap each other. ing. And the edge part of the conducting wire which comprises two type winding coils becomes the connection end point 31, the neutral point 32, or the cutting part 33 connected to the exterior in the coil 3 of each phase. Here, the cutting portion 33 is a portion that needs to be electrically connected in order for the coil 3 of each phase to conduct from the connection end point 31 to the neutral point 32, and both ends in the length direction L of the core 2. It is the part cut | disconnected in order to be located in a part. Accordingly, these two coil-winding coils constituting the coil 3 of each phase are connected in the length direction L of the core 2 so that the connection end point 31 to the neutral point 32 are conducted for each phase in the connection step described later. The cutting part 33 cut | disconnected by the both ends is electrically connected. Each die-wound coil is a single bundle of a plurality of conductive wires.

  Then, by attaching the coil 3 of each phase, which has been previously shaped into a predetermined waveform as described above, to the core 2, the coil 3 of each phase is wound around the core 2 as shown in FIG. In the illustrated example, the U-phase coil 3U, the V-phase coil 3V, and the W-phase coil 3W are attached to the core 2 in this order from the Ta side (slot forming surface 21 side) in the thickness direction. At this time, each of the plurality of coil sides 34 of the coil 3 of each phase is inserted into the corresponding slot S of the core 2. Looking at each of the U-phase coil 3U, V-phase coil 3V, and W-phase coil 3W, a plurality of coil sides 34 constituting the first die-wound coil are inserted into one of the two slots S of the same phase at intervals of 6 slots. A plurality of coil sides 34 constituting the second die-wound coil are inserted into the other of the two slots S having the same phase at intervals of 6 slots. The coil side 34 of the first die winding coil and the coil side 34 of the second die winding coil are respectively inserted into two slots S of the same phase adjacent to each other. And between the two coil sides 34 inserted at intervals of 6 slots of each die-wound coil is connected by a coil end 35. Here, either the connection end point 31 or the coil side 34 closest to the neutral point 32 in the coil 3 of each phase is inserted into both of the two slots S closest to the lengthwise ends 23 and 24 of the core 2. It is preferable that In the illustrated example, the coil side 34Ua closest to the connection end point 31U of the U-phase coil 3U is inserted into the one end slot Sa closest to the one end 23 in the length direction of the core 2. The coil side 34 </ b> Wa closest to the connection end point 31 </ b> W of the W-phase coil 3 </ b> W is inserted into the other end slot Sb closest to the other end 24 in the length direction of the core 2. After the coil 3 of each phase is wound around the core 2, the armature is formed by the coil end portions 35 of each phase protruding on both sides in the width direction W of the core 2 (both sides in the axis X direction after being formed into a cylindrical shape). One coil end portion is formed. In addition, the winding structure of the coil 3 of each phase with respect to each slot S of the core 2 is demonstrated in detail later using FIGS.

  After the winding process as described above, a molding process is performed in which the core 2 is bent and molded into a cylindrical shape so that both ends in the length direction L of the core 2 are in contact with each other. In the present embodiment, as shown in FIG. 6, bending is performed with the one Ta side in the thickness direction being radially inward so that the slot forming surface 21 of the core 2 is the inner peripheral surface. This bending process is performed using a cylindrical cored bar 51 (mandrel) having a predetermined radius. That is, bending is performed so that the rectangular parallelepiped core 2 is wound around the outer peripheral surface of the cored bar 51, and the core 2 is formed into a cylindrical shape. And the length direction one end part 23 and the length direction other end part 24 of the core 2 which will mutually contact | abut in the state shape | molded by the said cylindrical shape are joined by welding etc. FIG. Thereby, as shown in FIG. 1, the cylindrical core 2 in which the slot S opens to the inner peripheral surface side is obtained.

  After the forming step as described above, a connecting step of electrically connecting the cut portions 33 of the coil 3 cut at both ends in the length direction L of the core 2 is performed. At this time, the cutting portion 33 is connected so that the coil 3 of each phase is electrically connected from the connection end point 31 connected to the outside to the neutral point 32. As shown in FIG. 4, in this embodiment, the U-phase coil 3U includes a first cutting portion 33Ua located on the one side La in the length direction and a second cutting portion 33Ub located on the other side Lb in the length direction. The two cutting portions 33 are provided. And about U-phase coil 3U, by electrically connecting these 1st cutting part 33Ua and 2nd cutting part 33Ub, from connection end point 31U to neutral point 32U is conducted (refer to Drawing 8). Similarly, the W-phase coil 3W has two cutting portions 33, a first cutting portion 33Wa located on the one side La in the length direction and a second cutting portion 33Wb located on the other side Lb in the length direction. Yes. And about the W phase coil 3W, by electrically connecting these 1st cutting part 33Wa and the 2nd cutting part 33Wb, from the connection end point 31W to the neutral point 32W conduct | electrically_connect (refer FIG. 10). On the other hand, the V-phase coil 3V includes a first cutting part 33Va and a third cutting part 33Vc located on the one side La in the length direction, and a second cutting part 33Ub and a fourth cutting part 33Vd located on the other side Lb in the length direction. And four cutting portions 33. And about V-phase coil 3V, while electrically connecting the 1st cutting part 33Ua and the 2nd cutting part 33Ub, and electrically connecting the 3rd cutting part 33Uc and the 4th cutting part 33Ud, The connection end point 31V to the neutral point 32V conduct (see FIG. 9). In the present embodiment, the electrical connection of the two cut portions 33 in the coils 3 of each phase is performed by welding. In addition, it is suitable also as a structure connected using electrical connection components, such as a connector.

  Moreover, in this embodiment, the press process which presses the core 2 in the width direction W is performed after the above connection processes. In this pressing step, a portion outside the core 2 in the radial direction and protruding from the core 2 in the axis X direction and having no coil end portion 35 constituting the coil end portion is pressed from both sides in the width direction W of the core 2. . At this time, the pressing is performed by a pressing device using a hydraulic mechanism or the like. In order to press only a predetermined portion on the radially outer side of the core 2, it is preferable to use a cylindrical jig having a size corresponding to the portion. By such a pressing step, a plurality of laminated belt-like magnetic plates constituting the core 2 can be properly adhered. Further, according to the configuration of the present embodiment, the coil 3 of each phase is wound around the core 2 by wave winding, so that the coil end portion that connects the slots compared to the case where the coil 3 is wound by lap winding. The number of wires 35 can be reduced, and the coil end portion of the armature 1 can be reduced. Therefore, it is possible to secure a large area of the radially outer portion of the core that can be pressed by the pressing step, and the pressing step can be easily performed. It is preferable that the pressing process is performed after the molding process and before the connecting process. Moreover, it is also possible to set it as the manufacturing method which is not provided with such a press process.

  Through the above steps, the armature 1 according to this embodiment as shown in FIG. 1 is manufactured. Accordingly, the armature 1 manufactured by the above manufacturing method has a substantially rectangular parallelepiped shape in which a plurality of slots S extending from the one end portion 25 in the width direction to the other end portion 26 in the width direction are formed on one surface (slot forming surface 21). The cylindrical core 2 is formed by bending the core 2 so that the longitudinal ends 23 and 24 are in contact with each other. In addition, while being cut at both longitudinal ends 23 and 24 of the core 2, it is wound in a plurality of slots S by wave winding and is electrically connected from the connection end point 31 connected to the outside to the neutral point 32. As described above, each of the coils 3 of each phase is formed by electrically connecting the cut portion 33 which is the cut portion. At this time, the winding structure of the coil 3 of each phase with respect to each slot S of the core 2 is set in each of the two slots S closest to the longitudinal ends 23 and 24 of the core 2 in each phase 3. Any one of the coil sides 34 closest to the connection end point 31 or the neutral point 32 is inserted. Such a winding structure of the coil 3 will be described in detail below.

1-3. Coil Winding Structure Next, the coil 3 winding structure performed in the winding process according to the present embodiment will be described in detail with reference to FIGS. FIG. 7 is a schematic diagram showing the arrangement of the coil side 34 with respect to each slot S in a state where all of the U-phase coil 3U, the V-phase coil 3V, and the W-phase coil 3W are wound around the core 2. 8 to 10 are schematic views showing the arrangement of the coil sides 34 of the coils 3 of the respective phases. FIG. 8 shows a U-phase coil 3U, FIG. 9 shows a V-phase coil 3V, and FIG. 10 shows a W-phase coil. 3W is shown respectively. In these drawings, the 24 slots S formed in the core 2 are arranged in order from the one side La in the length direction to the other side Lb in the length direction, the first slot S1, the second slot S2, the third slot S3,. The 24th slot S24. Accordingly, the first slot S1 corresponds to the one end slot Sa closest to the one end 23 in the length direction of the core 2, and the 24th slot S24 corresponds to the other end slot Sb closest to the other end 24 in the length direction of the core 2. It corresponds to. In each figure, the conducting wire of U-phase coil 3U is represented by a solid line, the conducting wire of V-phase coil 3V is represented by a broken line, and the conducting wire of W-phase coil 3W is represented by an alternate long and short dash line. The connection end point 31 is marked with an arrow, and the neutral point 32 is marked with a black circle.

  When winding the coils 3 of each phase in the plurality of slots S of the core 2, the length of the first slot S 1 as one end slot Sa closest to the one end 23 in the length direction of the core 2 and the length of the core 2 Either the connection end point 31 or the coil side 34 closest to the neutral point 32 in the coil 3 of each phase is inserted into both the 24th slot S24 as the other end slot Sb closest to the other end 24 in the direction. It is preferable that In the present embodiment, as shown in FIG. 7, the coil side 34Ua closest to the connection end point 31U of the U-phase coil 3U is inserted into the first slot S1, and the coil side 34Wa closest to the connection end point 31W of the W-phase coil 3W. Is inserted into the 24th slot S24.

  More specifically, as shown in FIG. 8, for the U-phase coil 3U, the coil side 34Ua closest to the connection end point 31U is inserted into the first slot S1 as the one end slot Sa, and is closest to the neutral point 32U. The coil side 34Ub is inserted into the fourth 20th slot S20 from the other end slot Sb to the one side La in the length direction. In addition, the coil side 34U of the U-phase coil 3U has a second slot S2 adjacent to the other side Lb in the longitudinal direction of the first slot S1, a seventh slot S7 and an eighth slot S8 adjacent to each other, and a thirteenth adjacent to each other. The slot S13, the fourteenth slot S14, and the twentieth slot S20 are inserted into the nineteenth slot S19 adjacent to one side La in the length direction. The end of one side in the width direction Wa side of the coil side 34Ua inserted in the first slot S1 is the connection end point 31U, and the end of the coil side 34Ub inserted in the twentieth slot S20 in the one side in the width direction Wa. The neutral point is 32U.

  Further, on the other Wb side in the width direction of the core 2, between the first slot S1 and the seventh slot S7, between the second slot S2 and the eighth slot S8, and between the thirteenth slot S13 and the nineteenth slot S19. In each of the space between the 14th slot S14 and the 20th slot S20, the coil side 34U inserted in each slot S is connected by the coil end portion 35U. Further, on one side Wa in the width direction of the core 2, coil sides inserted into the slots S between the seventh slot S7 and the thirteenth slot S13 and between the eighth slot S8 and the fourteenth slot S14, respectively. 34U is connected by the coil end 35U. In addition, on one side Wa in the width direction of the core 2, a coil end 35Ua including a cut portion 33U is provided on each of the coil side 34U inserted in the second slot S2 and the coil side 34U inserted in the 19th slot S19. Connected. This coil end portion 35Ua is between the first cutting portion 33Ua located near one end portion 23 in the length direction of the core 2 and the second cutting portion 33Ub located near the other end portion 24 in the length direction of the core 2. Disconnected at. And if the 1st cutting part 33Ua and the 2nd cutting part 33Ub are electrically connected by the said connection process, it will become one continuous coil end part 35Ua.

  As shown in FIG. 9, for the V-phase coil 3V, the coil side 34Va closest to the connection end point 31V is inserted into the second third slot S3 from the one end slot Sa to the other Lb side in the length direction. The coil side 34Vb closest to the sex point 32V is inserted into the eighth ninth slot S9 from the one end slot Sa to the other side Lb in the longitudinal direction. In addition, the coil side 34V of the V-phase coil 3V is adjacent to the other side Lb in the length direction of the third slot S3 (third slot from the one end slot Sa to the other side Lb), the fourth slot S4, The ninth slot S9 is inserted into the tenth slot S10 adjacent to the other side Lb in the length direction, the fifteenth slot S15 and the sixteenth slot S16 adjacent to each other, the twenty-first slot S21 and the twenty-second slot S22 adjacent to each other. The end of one side in the width direction of the coil side 34Va inserted in the third slot S3 is a connection end point 31V, and the end of the coil side 34Vb inserted in the ninth slot S9 in the one side in the width direction Wa. The neutral point is 32V.

  Further, on the one side Wa in the width direction of the core 2, between the fourth slot S4 and the tenth slot S10, between the fifteenth slot S15 and the twenty-first slot S21, and between the sixteenth slot S16 and the twenty-second slot S22. , The coil side 34V inserted in each slot S is connected by a coil end 35V. Further, on the other Wb side in the width direction of the core 2, coil sides inserted into the slots S between the ninth slot S9 and the fifteenth slot S15 and between the tenth slot S10 and the sixteenth slot S16, respectively. 34V is connected by the coil end 35V. In addition, on the other side Wb in the width direction of the core 2, a coil end portion 35Va including a cutting portion 33V is provided on each of the coil side 34Va inserted in the third slot S3 and the coil side 34V inserted in the 22nd slot S22. The coil end portion 35Vb including the cutting portion 33V is connected to each of the coil side 34V inserted in the fourth slot S4 and the coil side 34V inserted in the twenty-first slot S21. The coil end portion 35Va is between the first cutting portion 33Va located near one end portion 23 in the length direction of the core 2 and the second cutting portion 33Vb located near the other end portion 24 in the length direction of the core 2. Disconnected. And when the 1st cutting part 33Va and the 2nd cutting part 33Vb are electrically connected by the said connection process, it will become one continuous coil end part 35Va. The coil end portion 35Vb is between the third cutting portion 33Vc located near the one end portion 23 in the length direction of the core 2 and the fourth cutting portion 33Vd located near the other end portion 24 in the length direction of the core 2. Disconnected. And if the 3rd cutting part 33Vc and the 4th cutting part 33Vd are electrically connected by the said connection process, it will become one continuous coil end part 35Vb.

  As shown in FIG. 10, for the W-phase coil 3W, the coil side 34W closest to the connection end point 31W is inserted into the 24th slot S24 as the other end slot Sb, and the coil side 34Wb closest to the neutral point 32W is The first slot Sa is inserted into the fourth fifth slot S5 on the other side Lb in the length direction. In addition, the coil side 34W of the W-phase coil 3W has a sixth slot S6 adjacent to the other side Lb in the longitudinal direction of the fifth slot S5, an eleventh slot S11 and an twelfth slot S12 adjacent to each other, and a seventeenth adjacent to each other. The slot S17, the eighteenth slot S18, and the twenty-fourth slot S24 are inserted into the twenty-third slot S23 adjacent to one side La in the length direction. The end on the one side Wa side in the width direction of the coil side 34Wa inserted in the 24th slot S24 is a connection end point 31W, and the end on the one side Wa side in the width direction of the coil side 34Wb inserted in the fifth slot S5 is set. The neutral point is 32W.

  Further, on the other Wb side in the width direction of the core 2, between the fifth slot S5 and the eleventh slot S11, between the sixth slot S6 and the twelfth slot S12, and between the seventeenth slot S17 and the twenty-third slot S23. In each of the space between the 18th slot S18 and the 24th slot S24, the coil side 34W inserted in each slot S is connected by the coil end portion 35W. Furthermore, on one side Wa of the core 2 in the width direction, the coil sides inserted into the slots S between the eleventh slot S11 and the seventeenth slot S17 and between the twelfth slot S12 and the eighteenth slot S18, respectively. 34W is connected by the coil end 35W. In addition, on one side Wa in the width direction of the core 2, a coil end portion 35 </ b> Wa including a cutting portion 33 </ b> W is provided on each of the coil side 34 </ b> W inserted in the sixth slot S <b> 6 and the coil side 34 </ b> W inserted in the 23rd slot S <b> 23. Connected. This coil end portion 35 </ b> Wa is between a first cutting portion 33 </ b> Wa located near one end portion 23 in the length direction of the core 2 and a second cutting portion 33 </ b> Wb located near the other end portion 24 in the length direction of the core 2. Disconnected at. And if the 1st cutting part 33Wa and the 2nd cutting part 33Wb are electrically connected by the said connection process, it will become one continuous coil end part 35Wa.

  According to the above configuration, for the two slots closest to both ends in the length direction L of the core 2, that is, both the one end slot Sa and the other end slot Sb, the coil sides 34 inserted in the slots Sa and Sb One end portion is a connection end point 31 or a neutral point 32 that does not need to be connected to the coil side 34 of the same phase inserted in the other slot S. Accordingly, it is possible to reduce the number of conductive wires constituting the coil end portion 35 connecting the slot S on one end side in the length direction of the core 2 and the slot S on the other end side in the length direction. Therefore, the number of connection locations of the cutting portions 33 of the coil 3 at both ends in the length direction L of the core 2 can be reduced.

  In the present embodiment, the coil 3 of each phase is wound around each slot S of the core 2 as described above, thereby connecting the connection end point 31U and the neutral point 32U of the U-phase coil 3U and the V-phase coil 3V. The end point 31V, the neutral point 32V, and the connection end point 31W and the neutral point 32W of the W-phase coil 3W are all configured to be positioned on the one side Wa in the width direction of the core 2. Accordingly, the length of the conductive wire for connecting each of the connection end points 31U, 31V, 31W of each phase with the external inverter output terminal and the like and for connecting the neutral points 32U, 32V, 32W of each phase is shortened. Therefore, the configuration for the connection can be simplified. On the other hand, the cut portions 33 are arranged separately in the width direction of the core 2. Specifically, as described above, in the U-phase coil 3U and the W-phase coil 3W, the cutting portions 33U and 33W are positioned on one side Wa in the width direction of the core 2, and the V-phase coil 3V has the cutting portion 33V in the core 2 It winds so that it may be located in the other width direction Wb side.

2. Second Embodiment Next, a second embodiment of the present invention will be described. 11 to 13 are schematic views showing the arrangement of the coil sides 34 of the coils 3 of the respective phases of the armature 1 according to the present embodiment. FIG. 11 shows a U-phase coil 3U, and FIG. 12 shows a V-phase coil 3V. FIG. 13 shows the W-phase coil 3W. As shown in these drawings, in this embodiment, each phase of the coil 3 has two layers, and in the winding process, two coil sides 34 are inserted into each slot S. Thus, this is different from the first embodiment. In addition, with such a difference, a specific winding structure of the coil 3 performed in the winding process is also different. Below, the winding structure of the coil 3 of the armature 1 according to the present embodiment will be described focusing on the differences from the first embodiment. Note that points not particularly described are the same as those in the first embodiment.

  Also in this embodiment, the coil side 34Ua closest to the connection end point 31U of the U-phase coil 3U is inserted into the first slot S1 (see FIG. 11), and the coil side 34Wa closest to the connection end point 31W of the W-phase coil 3W is the first It is inserted into the 24 slot S24 (see FIG. 13). This point is the same as in the first embodiment. However, in the present embodiment, the number of conductive wires constituting the coil 3 is increased by a factor of two compared to the first embodiment by making the coil 3 of each phase into two layers. Therefore, the number of cutting parts 33 located near both ends in the length direction L of the core 2 and the number of coil end parts 35 including the cutting parts 33 are also increased with respect to the first embodiment. Hereinafter, it demonstrates concretely according to drawing.

  As shown in FIG. 11, for the U-phase coil 3U, the coil side 34Ua closest to the connection end point 31U is inserted into the first slot S1 as the one end slot Sa, and the coil side 34Ub closest to the neutral point 32U is The fourth slot 20 is inserted into the fourth 20th slot S20 from the other end slot Sb to the one La side in the length direction. In addition to the coil side 34Ua or the coil side 34Ub, one coil side 34U is inserted into each of the first slot S1 and the twentieth slot S20. In addition, the coil side 34U of the U-phase coil 3U has a second slot S2 adjacent to the other side Lb in the longitudinal direction of the first slot S1, a seventh slot S7 and an eighth slot S8 adjacent to each other, and a thirteenth adjacent to each other. Two slots are inserted into each of the nineteenth slots S19 adjacent to one La in the length direction of the slot S13, the fourteenth slot S14, and the twentieth slot S20. The end of one side in the width direction Wa side of the coil side 34Ua inserted in the first slot S1 is the connection end point 31U, and the end of the coil side 34Ub inserted in the twentieth slot S20 in the one side in the width direction Wa. The neutral point is 32U.

  Further, on the other Wb side in the width direction of the core 2, between the first slot S1 and the seventh slot S7, between the second slot S2 and the eighth slot S8, and between the thirteenth slot S13 and the nineteenth slot S19. For each of the fourteenth slot S14 and the twentieth slot S20, one of the two coil sides 34U inserted in each slot S and the other are connected by a coil end 35U. Further, on the one Wa side in the width direction of the core 2, two inserted into each slot S between the seventh slot S7 and the thirteenth slot S13 and between the eighth slot S8 and the fourteenth slot S14. One side and the other side of the coil sides 34U are connected by a coil end 35U.

  In addition, on one Wa side in the width direction of the core 2, the coil side 34U other than the coil side 34Ua closest to the connection end point 31U inserted in the first slot S1 and the two coil sides 34U inserted in the 19th slot S19 The coil end 35Ua including the cutting portion 33U is connected to each of the one, and one of the two coil sides 34U inserted into the second slot S2 and the two coil sides 34U inserted into the nineteenth slot S19. The coil end portion 35Ub including the cutting portion 33U is connected to each of the other of the two, and the other of the two coil sides 34U inserted into the second slot S2 and the neutral point 32U inserted into the twentieth slot S20. A coil end 35Uc including a cutting portion 33U is connected to each of the coil sides 34U other than the nearest coil side 34Ub. The coil end portion 35Ua is between the first cutting portion 33Ua located near the one end portion 23 in the length direction of the core 2 and the second cutting portion 33Ub located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Ub is between the third cut portion 33Uc located near the one end portion 23 in the length direction of the core 2 and the fourth cut portion 33Ud located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Uc is between the fifth cut portion 33Ue located near the one end portion 23 in the length direction of the core 2 and the sixth cut portion 33Uf located near the other end portion 24 in the length direction of the core 2. Disconnected. And by the said connection process, between the 1st cutting part 33Ua and the 2nd cutting part 33Ub, between the 3rd cutting part 33Uc and the 4th cutting part 33Ud, and between the 5th cutting part 33Ue and the 6th cutting part 33Uf When the gaps are electrically connected, the coil ends 35Ua, 35Ub, and 35Uc are continuous.

  As shown in FIG. 12, for the V-phase coil 3V, the coil side 34Va closest to the connection end point 31V is inserted into the second third slot S3 from the one end slot Sa to the other Lb side in the length direction. The coil side 34Vb closest to the sex point 32V is inserted into the ninth tenth slot S9 from the one end slot Sa to the other side Lb in the length direction. In addition to the coil side 34Va or the coil side 34Vb, one coil side 34V is inserted into each of the third slot S3 and the tenth slot S10. In addition, the coil side 34V of the V-phase coil 3V is adjacent to the other side Lb in the length direction of the third slot S3 (third slot from the one end slot Sa to the other side Lb), the fourth slot S4, Two slots in each of the ninth slot S9 adjacent to one La side in the longitudinal direction of the tenth slot S10, the fifteenth slot S15 and the sixteenth slot S16 adjacent to each other, the twenty-first slot S21 and the twenty-second slot S22 adjacent to each other. Inserted one by one. The end on the one side Wa side in the width direction of the coil side 34Va inserted in the third slot S3 is a connection end point 31V, and the end on the one side Wa side in the width direction of the coil side 34Vb inserted in the tenth slot S10 is. The neutral point is 32V.

  Further, on one side Wa in the width direction of the core 2, the coil side 34V other than the coil side 34Va closest to the connection end point 31V inserted in the third slot S3 and the two coil sides 34V inserted in the ninth slot S9 are provided. Between one of the two coil sides 34V inserted into the fourth slot S4 and between the other of the two coil sides 34V inserted into the ninth slot S9, it was inserted into the fourth slot S4. The other end of the two coil sides 34V and the coil side 34V other than the coil side 34Vb closest to the neutral point 32V inserted in the tenth slot S10 are connected by the coil end 35U. Further, on the other side Wb in the width direction of the core 2, two inserted into each slot S between the ninth slot S9 and the fifteenth slot S15 and between the tenth slot S10 and the sixteenth slot S16. One of the coil sides 34U and the other are connected by a coil end 35V.

  Further, on the other side Wb in the width direction of the core 2, each of the coil side 34Va closest to the connection end point 31V inserted in the third slot S3 and one of the two coil sides 34V inserted in the 21st slot S21 is provided. The coil end 35Va including the cutting part 33V is connected, and the coil side 34V other than the coil side 34Va closest to the connection end point 31V inserted in the third slot S3 and the two coil sides inserted in the 21st slot S21 A coil end 35Vb including a cutting portion 33V is connected to each of the other of 34V, and one of two coil sides 34V inserted into the fourth slot S4 and two coils inserted into the 22nd slot S22 A coil end 35Vc including a cutting portion 33V is connected to one of the sides 34V, and the two coil sides 3 inserted into the fourth slot S4. In each of the V of the other and the other two coil side 34V which is inserted into the 22 slots S22, coil ends 35Vd including cutting portion 33V is connected. The coil end portion 35Va is between the first cutting portion 33Va located near one end portion 23 in the length direction of the core 2 and the second cutting portion 33Vb located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Vb is between the third cutting portion 33Vc located near the one end portion 23 in the length direction of the core 2 and the fourth cutting portion 33Vd located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Vc is between the fifth cut portion 33Ve located near the one end portion 23 in the length direction of the core 2 and the sixth cut portion 33Vf located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Vd is between the seventh cut portion 33Vg located near the one end portion 23 in the length direction of the core 2 and the eighth cut portion 33Vh located near the other end portion 24 in the length direction of the core 2. Disconnected. And between the first cutting part 33Va and the second cutting part 33Vb, between the third cutting part 33Vc and the fourth cutting part 33Vd, between the fifth cutting part 33Ve and the sixth cutting part 33Vf by the above connecting step. When the seventh cutting portion 33Vg and the eighth cutting portion 33Vh are electrically connected, the coil ends 35Va, 35Vb, 35Vc, and 35Vd are continuous.

  As shown in FIG. 13, for the W-phase coil 3W, the coil side 34W closest to the connection end point 31W is inserted into the 24th slot S24 as the other end slot Sb, and the coil side 34Wb closest to the neutral point 32W is The first slot Sa is inserted into the fourth fifth slot S5 on the other side Lb in the length direction. In addition to the coil side 34Wa or the coil side 34Wb, one coil side 34W is inserted into each of the 24th slot S24 and the fifth slot S5. In addition, the coil side 34W of the W-phase coil 3W has a sixth slot S6 adjacent to the other side Lb in the longitudinal direction of the fifth slot S5, an eleventh slot S11 and an twelfth slot S12 adjacent to each other, and a seventeenth adjacent to each other. Two slots are inserted into each of the 23rd slots S23 adjacent to one side La in the length direction of the slot S17, the 18th slot S18 and the 24th slot S24. The end on the one side Wa side in the width direction of the coil side 34Wa inserted in the 24th slot S24 is a connection end point 31W, and the end on the one side Wa side in the width direction of the coil side 34Wb inserted in the fifth slot S5 is set. The neutral point is 32W.

  Further, on the other Wb side in the width direction of the core 2, between the fifth slot S5 and the eleventh slot S11, between the sixth slot S6 and the twelfth slot S12, and between the seventeenth slot S17 and the twenty-third slot S23. In each of the 18th slot S18 and the 24th slot S24, one of the two coil sides 34W inserted in each slot S and the other are connected by a coil end 35W. Further, on the one Wa side in the width direction of the core 2, two inserted into each slot S between the eleventh slot S11 and the seventeenth slot S17 and between the twelfth slot S12 and the eighteenth slot S18. One side and the other side of the coil sides 34W are connected by a coil end portion 35W.

  Further, on one side Wa in the width direction of the core 2, one of the two coil sides 34W inserted into the sixth slot S6 and a coil side other than the coil side 34Wa closest to the connection end point 31W inserted into the 24th slot S24 The coil end 35W including the cutting portion 33W is connected to each of the 34W, and the other of the two coil sides 34W inserted into the sixth slot S6 and the two coil sides 34W inserted into the 23rd slot S23. The coil end portion 35Wb including the cutting portion 33W is connected to each of the coil side 34W and inserted into the coil side 34W other than the coil side 34Wb closest to the neutral point 32W inserted into the fifth slot S5 and the 23rd slot S23. The coil end portion 35Wc including the cutting portion 33W is connected to each of the other two coil sides 34W. The coil end portion 35 </ b> Wa is between the first cutting portion 33 </ b> Wa located near the one end portion 23 in the length direction of the core 2 and the second cutting portion 33 </ b> Wb located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Wb is between the third cut portion 33Wc located near the one end portion 23 in the length direction of the core 2 and the fourth cut portion 33Wd located near the other end portion 24 in the length direction of the core 2. Disconnected. The coil end portion 35Wc is between the fifth cut portion 33We located near one end portion 23 in the length direction of the core 2 and the sixth cut portion 33Wf located near the other end portion 24 in the length direction of the core 2. Disconnected. And between the first cutting part 33Wa and the second cutting part 33Wb, between the third cutting part 33Wc and the fourth cutting part 33Wd, and between the fifth cutting part 33We and the sixth cutting part 33Wf by the connecting step. When the gaps are electrically connected, the coil ends 35Wa, 35Wb, and 35Wc are continuous.

  According to the above configuration, two coils inserted into the slots Sa and Sb for the two slots closest to both ends in the length direction L of the core 2, that is, both the one end slot Sa and the other end slot Sb. One end of one of the sides 34 is a connection end point 31 or a neutral point 32 that does not need to be connected to the coil side 34 of the same phase inserted in the other slot S. Accordingly, it is possible to reduce the number of conductive wires constituting the coil end portion 35 connecting the slot S on one end side in the length direction of the core 2 and the slot S on the other end side in the length direction. Therefore, the number of connection locations of the cutting portions 33 of the coil 3 at both ends in the length direction L of the core 2 can be reduced.

  Also in the present embodiment, similarly to the first embodiment, the coil 3 of each phase is wound around each slot S of the core 2 as described above, so that the connection end point 31U of the U-phase coil 3U and the middle The connection point 31V and the neutral point 32V of the V-phase coil 3V, the connection point 31W and the neutral point 32W of the W-phase coil 3W are all located on one side Wa in the width direction of the core 2. Has been. Accordingly, the length of the conductive wire for connecting each of the connection end points 31U, 31V, 31W of each phase with the external inverter output terminal and the like and for connecting the neutral points 32U, 32V, 32W of each phase is shortened. Therefore, the configuration for the connection can be simplified. On the other hand, the cut portions 33 are arranged separately in the width direction of the core 2. Specifically, as described above, in the U-phase coil 3U and the W-phase coil 3W, the cutting portions 33U and 33W are positioned on one side Wa in the width direction of the core 2, and the V-phase coil 3V has the cutting portion 33V in the core 2 It winds so that it may be located in the other width direction Wb side.

3. Other Embodiments (1) In the above embodiment, the case where the number of slots corresponding to each pole of the armature 1 is set to “2” has been described as an example. However, the embodiment of the present invention is not limited to this. Accordingly, one preferred embodiment of the present invention is to set the number of slots corresponding to each pole to “1” or “3” or more. In the above embodiment, the case where the number of poles of the rotor is “4” has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, setting the number of poles of the rotor to “2” or “6” or more is one of the preferred embodiments of the present invention. In any case, the total number of slots formed in the core 2 is determined by the number of slots corresponding to each pole and the number of poles of the rotor.

(2) In the first embodiment, a case where a single-layer winding in which one coil side 34 is inserted into each slot S will be described. In the second embodiment, two coils are provided in each slot S. The case where the two-layer winding for inserting the side 34 is described. However, the embodiment of the present invention is not limited to this, and a configuration in which three or more coil sides 34 are inserted into each slot S is one of the preferred embodiments of the present invention. In this case, the winding structure of the coil 3 of each phase with respect to each slot S can be realized by increasing the number of coil sides 34 to be inserted into each slot S according to the same rule as in the second embodiment. it can.

(3) In each of the above embodiments, the case where the armature 1 is configured as a stator of a rotating electric machine, and the field as a rotor is disposed radially inward of the armature 1 as the stator has been described as an example. . However, the embodiment of the present invention is not limited to this. Therefore, for example, a configuration in which a field as a rotor is arranged on the outer side in the radial direction of the armature 1 as a stator, and the armature 1 is used as a stator of an outer rotor type rotating electrical machine. One of the forms. In addition, configuring the armature 1 according to the present invention as a rotor of a rotating electrical machine is one of the preferred embodiments of the present invention. In this case, the stator becomes a field, and a rotary armature type rotary electric machine is configured. Further, in this case, a field as a stator is arranged radially outside the armature 1 as a rotor, and the armature 1 is a rotor of an inner rotor type rotating electric machine, or an armature as a rotor. The field as a stator is arranged on the radially inner side of the armature 1, and the armature 1 can be a rotor of an outer rotor type rotating electrical machine.

(4) In each of the above-described embodiments, the case where the core 2 is bent and molded into a cylindrical shape so that the slot S opens toward the inner peripheral surface side has been described as an example in the molding step. However, the embodiment of the present invention is not limited to this. Therefore, for example, when the field is arranged on the outer side in the radial direction of the armature 1, the core 2 is bent into a cylindrical shape so that the slot S opens to the outer peripheral surface side in the molding step. This is also a preferred embodiment of the present invention.

(5) In the above embodiment, the case where each coil side 34 and the coil end portion 35 are configured by bundling a plurality of conductive wires has been described as an example. However, the embodiment of the present invention is not limited to this, and each coil side 34 and coil end portion 35 may be configured by one relatively thick conducting wire. One.

(6) In the first embodiment, for the V-phase coil 3V, the coil side 34Va closest to the connection end point 31V is inserted into the second third slot S3 from the one end slot Sa to the other side Lb in the length direction. The case where the coil side 34Vb closest to the neutral point 32V is inserted into the eighth ninth slot S9 from the one end slot Sa to the other side Lb in the length direction has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, as shown in FIG. 14, the coil side 34Va closest to the connection end point 31V is inserted into the ninth fifteenth slot S15 from the other end slot Sb to the one side La in the length direction, to the neutral point 32V. It is also a preferred embodiment of the present invention that the nearest coil side 34Vb is inserted into the third 21st slot S21 from the other end slot Sb to the one side La in the length direction. In this case, the coil side 34V is also inserted into the second 22nd slot S22 on the one side La side in the length direction from the other end slot Sb.

(7) In the above embodiment, the coil side 34Ua closest to the connection end point 31U of the U-phase coil 3U is inserted into the one end slot Sa, and the coil side 34W closest to the connection end point 31W of the W-phase coil 3W is the other end slot The case where it is inserted into Sb has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the coil side 34Ub closest to the neutral point 32U of the U-phase coil 3U (first phase coil) is inserted into the one end slot Sa, and the neutral point 32W of the W-phase coil 3W (third phase coil) is inserted. A configuration in which the nearest coil side 34Wb is inserted into the other end slot Sb is also one preferred embodiment of the present invention. In this case, for all of the U-phase coil 3U, the V-phase coil 3V, and the W-phase coil 3W, each of the coil side 34 closest to the connection end point 31 and the coil side 34 closest to the neutral point is inserted in the slot S. The position will be changed.

(8) In the above embodiment, the coil side 34 closest to the connection end point 31 or the neutral point 32 in the coil 3 of each phase is provided in both of the two slots closest to both ends in the length direction L of the core 2. The case where one of them is inserted has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, it is also possible to adopt a configuration in which the coil side 34 closest to the connection end point 31 or the neutral point 32 is not inserted into both of the two slots closest to both ends in the length direction L of the core 2. Also, either one of the two slots closest to both ends in the length direction L of the core 2 is inserted with either the connection end point 31 or the coil side 34 closest to the neutral point 32 in the coil 3 of each phase. It is also one of the preferred embodiments of the present invention to have a configuration.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for an armature manufacturing method in which a coil is wound around a substantially rectangular parallelepiped core and then the core is formed into a cylindrical shape, and an armature manufactured by the manufacturing method.

The perspective view which shows the whole armature structure which concerns on 1st embodiment of this invention. The perspective view which shows the form of the substantially rectangular parallelepiped core before shape | molding in cylindrical shape by a formation process. The perspective view which shows the state of the core after an insulating sheet insertion process The perspective view which shows the state before the coil of each phase is wound by the core. The perspective view which shows the state after a winding process Plan view showing the molding process Schematic diagram showing the arrangement of coil sides for each slot with all three-phase coils wound around the core Schematic showing the arrangement of the coil sides of the U-phase coil Schematic showing the arrangement of the coil sides of the V-phase coil Schematic showing the arrangement of the coil sides of the W-phase coil The schematic diagram which shows arrangement | positioning of the coil side of the U-phase coil which concerns on 2nd embodiment of this invention. The schematic diagram which shows arrangement | positioning of the coil side of the V phase coil which concerns on 2nd embodiment of this invention. The schematic diagram which shows arrangement | positioning of the coil side of the W phase coil which concerns on 2nd embodiment of this invention. The schematic diagram which shows arrangement | positioning of the coil side of the V phase coil which concerns on other embodiment of this invention.

Explanation of symbols

1: Armature 2: Core 3: Coil 21: Slot forming surface 23: Length direction one end 24: Length direction other end 25: Width direction one end 26: Width direction other end 3U: U phase coil (First phase coil)
3V: V phase coil (second phase coil)
3W: W phase coil (third phase coil)
31: Connection end point 32: Neutral point 33: Cutting part 34: Coil side S: Slot Sa: One end slot Sb: Other end slot L: Core length direction La: Length direction one Lb: Length direction other W : Core width direction Wa: One width direction Wb: The other width direction

Claims (10)

Using a substantially rectangular parallelepiped core in which a plurality of slots extending from one end in the width direction to the other end are formed on one surface, the coils of each phase are cut at both ends in the length direction of the core; A winding step of winding the coil in the plurality of slots with a wave winding;
After the winding step, a molding step in which the core is bent into a cylindrical shape so that both ends in the length direction are in contact with each other;
After the molding step, for the coils of each phase, a connection step of electrically connecting the cut portion, which is the cut portion, so as to conduct from the connection end point connected to the outside to the neutral point;
The manufacturing method of the armature which has.   The coil end closest to the connection end point or the neutral point in the coil of each phase is inserted into both of the two slots closest to both ends in the length direction of the core. Method for manufacturing an armature. The armature includes the coils of the first phase, the second phase, and the third phase,
In the winding step,
The coil of the first phase has a coil side closest to one of the connection end point and the neutral point inserted into one end slot closest to one end in the length direction of the core, and Coil sides are also inserted into adjacent slots,
In the third phase coil, the coil side closest to one of the connection end point and the neutral point is inserted into the other end slot closest to the other end in the length direction of the core, and Coil sides are also inserted into adjacent slots,
In the first phase, second phase, and third phase coils, the connection end point and the neutral point are located on one side in the width direction of the core,
In the first phase and third phase coils, the cutting portion is located on one side in the width direction of the core, and in the second phase coil, the cutting portion is located on the other side in the width direction of the core. The method for manufacturing an armature according to claim 1 or 2, wherein the armature is wound as described above. In the winding step,
In the second phase coil, the coil side closest to one of the connection end point and the neutral point is inserted into the second slot from the one end slot to the other side in the length direction of the core, and The armature manufacturing method according to claim 3, wherein winding is performed so that the coil side is also inserted into a third slot from the one end slot to the other side in the length direction of the core. In the winding step,
In the second phase coil, the coil side closest to the other of the connection end point and the neutral point is inserted into the third slot on the one side in the length direction of the core from the other end slot, The armature manufacturing method according to claim 3, wherein the coil is wound so that a coil side is also inserted into a second slot on one side in the longitudinal direction of the core from the other end slot.   6. The electric machine according to claim 1, wherein the coils of each phase are n-layered (n is a natural number), and n coil sides are inserted into the slots in the winding step. Child manufacturing method.   The said core is a manufacturing method of the armature as described in any one of Claim 1 to 6 comprised by laminating | stacking several strip | belt-shaped magnetic plates.   The armature manufacturing method according to claim 7, further comprising a pressing step of pressing the core in the width direction after the forming step. Using a substantially rectangular parallelepiped core in which a plurality of slots extending from one end in the width direction to the other end are formed on one surface, the core is bent into a cylindrical shape so that both ends in the length direction abut each other. A cylindrical core formed by molding;
In a state where the core is cut at both ends in the length direction, the core is wound around the plurality of slots with wave winding, and the cut is performed so that the connection end point connected to the outside to the neutral point is conducted. A coil of each phase formed by electrically connecting a cut portion which is a portion,
Armature with   The coil end closest to the connection end point or the neutral point in the coil of each phase is inserted into both of the two slots closest to both ends in the length direction of the core. Armature.

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