JP2012196062A - Rotary electric machine and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine, having a stator and a rotor, that allows adhesive sheets to be attached to magnets in a more favorable state, and to provide a method for manufacturing the same.SOLUTION: A rotary electric machine 1 includes a stator 2, and a rotor 3 that is supported rotatably with respect to the stator 2. The rotor 3 has: a plurality of insertion holes 21 that are formed at regular intervals in a circumferential direction of the rotor 3; magnets 30 that are inserted in the respective insertion holes 21; and adhesive sheets 40 attached to respective outer peripheral surfaces 31 of the magnets 30 facing respective inner peripheral surfaces of the insertion holes 21, each adhesive sheet 40 having: adhesive regions 41 that bond the magnets 30 to the respective insertion holes 21; and non-adhesive regions 42 excluding the adhesive regions 41.

Description

  The present invention relates to a rotating electrical machine including a rotor on which magnets are arranged and a method for manufacturing the same.

  2. Description of the Related Art A rotating electrical machine mounted on a hybrid vehicle or an electric vehicle includes a stator around which a coil is wound and a magnet embedded motor in which a rotor having a magnet is disposed on the inner peripheral side of the stator. For example, Patent Document 1 discloses a rotor in which a magnet insertion hole is provided in a rotor core formed by laminating a large number of electromagnetic steel plates, and a magnet is inserted into the magnet insertion hole and fixed with an adhesive. As a method for manufacturing such a rotor, for example, Patent Document 2 discloses a method in which an adhesive sheet containing an adhesive is attached to the outer peripheral surface of a magnet and the magnet is inserted into a magnet insertion hole and then cured and bonded. ing.

JP 2007-74899 A JP 2006-311782 A

In such a rotor, when the adhesive sheet is attached to the magnet, air bubbles may be mixed between the outer peripheral surface of the magnet and the adhesive sheet. If it does so, thickness will increase by the amount of a bubble, and when inserting the magnet by which the adhesive sheet was affixed in the magnet insertion hole, there existed a possibility that an adhesive sheet might be caught by the peripheral part of a magnet insertion hole, and peeled. Further, since the bonding area is reduced by the mixing of bubbles, there is a risk of causing a decrease in the adhesive force.
The present invention has been made in view of the above problems, and provides a rotating electrical machine that can attach an adhesive sheet to a magnet in a better state in a rotating electrical machine including a stator and a rotor, and a method for manufacturing the rotating electrical machine. With the goal.

In order to solve the above-described problem, an invention according to claim 1 is a rotating electrical machine including a stator and a rotor supported rotatably with respect to the stator,
The rotor includes a plurality of insertion holes formed at equal intervals in the circumferential direction of the rotor, a magnet inserted into each of the plurality of insertion holes, and an outer peripheral surface of the magnet facing the inner peripheral surface of the insertion hole. And an adhesive sheet having an adhesive region that adheres the magnet to the insertion hole and a non-adhesive region excluding the adhesive region.

According to a second aspect of the present invention, in the first aspect, the adhesive sheet has a plurality of the adhesive regions.
According to a third aspect of the present invention, in the first aspect, the adhesive sheet has a plurality of non-adhesive regions.

According to a fourth aspect of the present invention, in the second aspect, each of the bonding regions of the adhesive sheet has a circular shape.
According to a fifth aspect of the present invention, in the second aspect, each of the adhesion regions of the adhesive sheet has a stripe shape.

According to a sixth aspect of the present invention, in the third aspect, each non-bonded region of the adhesive sheet has a circular shape.
According to a seventh aspect of the present invention, in the third aspect, each non-adhesive region of the adhesive sheet has a stripe shape.

In order to solve the above-described problem, an invention according to claim 8 is a method of manufacturing a rotating electrical machine including a stator and a rotor supported rotatably with respect to the stator,
The adhesive sheet is affixed to the outer peripheral surface of the magnet so that the adhesive region of the adhesive sheet affixed to the outer peripheral surface of the magnet and the non-adhesive region of the adhesive sheet excluding the adhesive region are mixed. An inserting step of inserting the magnets into a plurality of insertion holes formed at equal intervals in the circumferential direction of the rotor such that the inner peripheral surface of the insertion hole and the outer peripheral surface of the magnet face each other; A bonding step of bonding the magnet to the insertion hole by the adhesive sheet affixed to the outer peripheral surface of the magnet, and a mounting step of mounting the rotor so as to be rotatably supported with respect to the stator. .

In order to solve the above-described problem, an invention according to claim 9 is a rotating electrical machine including a stator and a rotor supported rotatably with respect to the stator,
The rotor has an insertion hole formed in the rotor, a magnet inserted into the insertion hole, and an adhesive sheet that is attached to the magnet and adheres the magnet to the insertion hole,
The adhesive sheet has an adhesive region that is attached to the magnet and a non-adhesive region that is not attached to the magnet in a portion facing the magnet.

  According to the invention which concerns on Claim 1, the adhesive sheet which has an adhesion area | region and a non-adhesion area | region is affixed on the outer peripheral surface of a magnet. Thereby, when sticking an adhesive sheet on the outer peripheral surface of a magnet, even if an air bubble enters between the outer peripheral surface of a magnet and an adhesive sheet, the said air bubble can be extracted from a non-adhesion area | region. Therefore, it becomes possible to affix an adhesive sheet on a magnet in a better state. Therefore, it is possible to prevent the adhesive force from being reduced due to the mixing of bubbles.

  According to the invention which concerns on Claim 2, the adhesive sheet shall have a some adhesion | attachment area | region. In order to make a plurality of adhesion regions, for example, an adhesive sheet made of a plurality of pieces of adhesive pieces may be attached to the outer peripheral surface of the magnet so that the adhesive pieces are spaced at a predetermined interval. Thereby, an adhesion area | region will be mixed in a non-adhesion area | region in an adhesive sheet. If it does so, since the adhesion piece which forms each adhesion field will be surrounded by the non-adhesion field, even if a bubble enters between the outer peripheral surface of a magnet and an adhesion sheet, it can extract certainly.

  According to the invention which concerns on Claim 3, the adhesive sheet shall have a some non-bonding area | region. In order to make a plurality of non-adhesion regions, for example, an adhesive sheet in which a plurality of holes or notches are formed may be attached to the outer peripheral surface of the magnet. Thereby, a non-adhesion area | region is mixed in an adhesion | attachment area | region in an adhesive sheet. Then, the hole or notch that forms each non-adhesion region is surrounded by the adhesion region, and the distance from each part of the adhesion region to the non-adhesion region is shorter than before, so the outer circumference of the magnet Even when air bubbles enter between the surface and the adhesive sheet, they can be reliably extracted.

  According to the invention which concerns on Claim 4, each adhesion | attachment area | region of an adhesive sheet makes circular shape. As described above, when an adhesive sheet composed of a plurality of pieces of adhesive pieces is affixed to the outer peripheral surface of the magnet, if the adhesive piece that forms this adhesive region is circular, the adhesive sheet has a dot shape as a whole. It will be formed in a polka dot pattern. Thereby, the distance from the center part of the adhesion | attachment piece which forms a circular-shaped adhesion | attachment area | region to the non-adhesion area | region of the periphery becomes constant, and the mixed bubble can be extracted suitably.

  According to the invention which concerns on Claim 5, each adhesion | attachment area | region of an adhesive sheet makes stripe shape. As described above, when an adhesive sheet made up of a plurality of pieces of adhesive pieces is attached to the outer peripheral surface of the magnet, if the adhesive pieces that form this adhesive region are striped, the adhesive sheet has a striped pattern as a whole. Will be formed. Thereby, the distance from the center part of the width direction in the adhesion piece which forms a stripe-shaped adhesion field to the non-adhesion field of the circumference becomes constant, and the mixed bubble can be extracted suitably. In addition, the longitudinal direction of the adhesive region in the form of stripes takes into consideration the direction in which the film is urged during transfer when, for example, the adhesive sheet placed on the film is attached to the outer peripheral surface of the magnet. It may be set. Thereby, an adhesive sheet can be stuck, removing the bubble mixed efficiently.

  According to the invention which concerns on Claim 6, each non-adhesion area | region of an adhesive sheet makes circular shape. As described above, when an adhesive sheet in which a plurality of holes or notches are formed on the outer peripheral surface of the magnet is bonded, if the hole or notch that forms this non-adhesion region is circular, The sheet is formed in a dot-like polka dot pattern as a whole. Thereby, since the adhesion sheet | seat forms the continuous adhesion | attachment area | region, the mixed bubble can be extracted suitably, making it easy to stick to the outer peripheral surface of a magnet.

  According to the invention which concerns on Claim 7, each non-adhesion area | region of an adhesive sheet makes stripe shape. As described above, when an adhesive sheet in which a plurality of holes or notches are formed on the outer peripheral surface of the magnet is adhered, if the holes or notches forming the non-adhesive region are striped, The sheet is formed in a striped pattern as a whole. Thereby, since the adhesion sheet | seat forms the continuous adhesion | attachment area | region, the mixed bubble can be extracted suitably, making it easy to stick to the outer peripheral surface of a magnet. In addition, the longitudinal direction of the non-adhesive region in the form of a stripe takes into account the direction in which the film is urged during transfer when, for example, the adhesive sheet placed on the film is applied to the outer peripheral surface of the magnet. It is also possible to set it. Thereby, an adhesive sheet can be stuck, removing the bubble mixed efficiently.

According to the invention which concerns on Claim 8, in the sticking process, the adhesive sheet which has an adhesion area | region and a non-adhesion area | region is stuck on the outer peripheral surface of a magnet. Thereby, when sticking an adhesive sheet on the outer peripheral surface of a magnet, even if an air bubble enters between the outer peripheral surface of the magnet and the adhesive sheet in the adhesive region, the air bubble can be extracted from the non-adhesive region. Therefore, it becomes possible to affix an adhesive sheet on a magnet in a better state. Therefore, it is possible to prevent the adhesive force from being reduced due to the mixing of bubbles.
Further, other characteristic portions of the rotating electrical machine of the present invention can be similarly applied to the manufacturing method of the rotating electrical machine of the present invention. And the effect in this case also has the same effect as the effect as the rotating electrical machine.

  According to the ninth aspect of the invention, the adhesive sheet that is attached to the magnet and adheres the magnet to the insertion hole has an adhesive region and a non-adhesive region. Thereby, when adhering an adhesive sheet to a magnet, even if air bubbles enter between the magnet and the adhesive sheet, the air bubbles can be extracted from the non-adhesive region. Therefore, it becomes possible to affix an adhesive sheet on a magnet in a better state. Therefore, it is possible to prevent the adhesive force from being reduced due to the mixing of bubbles.

Embodiment: It is the fragmentary top view seen from the rotating shaft direction of the IPM motor. It is AA sectional drawing of FIG. It is a figure which shows the adhesion piece which makes the outer peripheral surface of a magnet and circular shape. It is a figure which shows the adhesion piece which makes the outer peripheral surface of a magnet and stripe form. It is a figure which shows the outer peripheral surface of a magnet, and the adhesive sheet stamped circularly. It is a figure which shows the outer peripheral surface of a magnet, and the adhesive sheet stamped by stripe form. It is a figure which shows the stripe-shaped adhesive sheet connected with the outer peripheral surface of the magnet.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a rotating electrical machine according to the present invention will be described with reference to the drawings. The rotating electrical machine according to the present invention will be described as a permanent magnet embedded motor (hereinafter referred to as an “IPM (Interior Permanent Magnet) motor”).

<Embodiment>
(Configuration of IPM motor 1)
In this embodiment, an IPM motor 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, the IPM motor 1 includes a stator 2 and a rotor 3. The stator 2 has a cylindrical stator core 10 and a coil (not shown). The stator core 10 is formed by stacking electromagnetic steel plates in the rotation axis direction. The stator core 10 is formed with a plurality of teeth 11 at a predetermined pitch in the circumferential direction. The stator 2 forms a magnetic field inside the stator 2 by passing a current through a coil wound around each tooth 11.

  The rotor 3 includes a rotor core 20, a permanent magnet 30 (corresponding to a “magnet” of the present invention), an adhesive sheet 40, and an end plate 50. The rotor 3 is provided to be rotatable with respect to the stator 2 with an air gap interposed inside the stator 2. The rotor 3 receives a magnetic force from the teeth 11 of the stator core 10 that has become a magnetic pole when an electric current is passed through the coils of the stator 2, and rotates about the axis of a rotating shaft (not shown). Thereby, the IPM motor 1 outputs a predetermined torque from the rotating shaft.

  The rotor core 20 is formed by laminating electromagnetic steel plates in the rotation axis direction. The rotor core 20 includes a magnet insertion hole 21, a rotor core main body 22, an outer peripheral magnetic pole portion 23, and a bridge 24. A plurality of magnet insertion holes 21 are provided in the rotor core 20 in the axial direction at a predetermined pitch in the circumferential direction of the rotor 3. Of the inner peripheral surface of the magnet insertion hole 21, the surface located on the radially outer side of the rotor 3 is defined as an insertion hole outer surface 21a. The insertion hole outer surface 21 a is a part to which the permanent magnet 30 is bonded by the adhesive sheet 40. The rotor core body 22 is located between the radially inner inner peripheral portion 22a of the rotor 3 of the magnet insertion hole 21 and the adjacent magnet insertion hole 21 and a part of the peripheral surface of the rotor core 20 from the outer side of the inner peripheral portion 22a. It consists of the inter-magnet magnetic pole part 22b which comprises. This intermagnet magnetic pole portion 22 b becomes a magnetic pole when the permanent magnet 30 is inserted into the magnet insertion hole 21.

  The outer peripheral magnetic pole portion 23 is a portion of the rotor core 20 that is located on the radially outer side of the rotor 3 of the permanent magnet 30 inserted into the magnet insertion hole 21 and forms the insertion hole outer surface 21 a of the magnet insertion hole 21. The outer peripheral magnetic pole portion 23 becomes a magnetic pole when the permanent magnet 30 is inserted into the magnet insertion hole 21. The bridge 24 is a portion that bridges both ends of the outer magnetic pole portion 23 and the inter-magnet magnetic pole portions 22b located on both sides of the magnet insertion hole 21 in the circumferential direction.

  The bridge 24 has a portion where the radial thickness of the rotor 3 is thinner than that of the outer magnetic pole portion 23. The thin portion of the bridge 24 functions as a flux barrier that reduces leakage magnetic flux. Here, the leakage magnetic flux is short-circuited with a part of the magnetic flux due to the permanent magnet 30 inserted into the magnet insertion hole 21 and passing through the bridge 24 and inserted into the adjacent magnet insertion hole 21. Magnetic flux. Since the leakage magnetic flux does not contribute to the rotational drive of the rotor 3, the magnetic characteristics can be improved by reducing the leakage magnetic flux.

  The permanent magnet 30 is a magnet that is formed in a flat plate shape and is magnetized in the thickness direction. The permanent magnets 30 are inserted into the plurality of magnet insertion holes 21 of the rotor core 20 so that the polarity is reversed with respect to the permanent magnets 30 inserted into the adjacent magnet insertion holes 21. Of the outer peripheral surface of the permanent magnet 30, the surface facing the insertion hole outer surface 21 a of the magnet insertion hole 21 is a magnet outer surface 31, and the surface located on the radially inner side of the rotor 3 is a magnet inner surface 32.

  The adhesive sheet 40 is a fixing unit that adheres the magnet outer surface 31 of the permanent magnet 30 to the insertion hole outer surface 21 a of the magnet insertion hole 21 and fixes the permanent magnet 30 to the magnet insertion hole 21. In the present embodiment, the adhesive sheet 40 is affixed to the magnet outer surface 31 and the magnet inner surface 32 of the permanent magnet 30 before being inserted into the magnet insertion hole 21. And after inserting the permanent magnet 30 in the magnet insertion hole 21, the rotor core 20 is heated and it adhere | attaches by making the adhesive sheet 40 foam. The process of assembling the rotor 3 using the adhesive sheet 40 and attaching the rotor 3 to the stator 2 will be described in detail in the method of manufacturing a rotating electrical machine.

  Further, as shown in FIG. 3, the adhesive sheet 40 has a plurality of pieces of adhesive pieces 41, and the adhesive pieces 41 are pasted on the magnet outer surface 31 of the permanent magnet 30 at a predetermined interval. As a result, a gap 42 is formed between the adhesive pieces 41. The bonding piece 41 is for bonding the permanent magnet 30 to the magnet insertion hole 21 and corresponds to the “bonding region” of the present invention. Further, the gap 42 surrounds the periphery of each adhesive piece 41 excluding the adhesive region in the adhesive sheet 40, and corresponds to the “non-adhesive region” of the present invention. That is, the adhesive sheet 40 has an adhesive piece 41 as an adhesive region that is attached to the permanent magnet 30 and a gap 42 as a non-adhesive region that is not attached to the permanent magnet 30 at a portion facing the permanent magnet 30. As described above, in the adhesive sheet 40 attached to the magnet outer surface 31 of the permanent magnet 30, the adhesive regions formed by the plurality of adhesive pieces 41 are mixed in the non-adhesive regions formed by the gap portions 42. In the present embodiment, the adhesive piece 41 of the adhesive sheet 40 has a circular shape. Thereby, the adhesive sheet 40 is formed in a dot-like polka dot pattern as a whole.

  As shown in FIG. 2, the end plate 50 is a plate-like member that is attached so as to support the rotor core 20 at both axial ends of the rotor core 20. This end plate 50 is made of a non-magnetic material in order to prevent leakage of magnetic lines of force in the axial direction of the rotor core 20 generated from the stator 2. The end plates 50 at both ends are integrally fixed by fixing pins 51 that are inserted through the rotor core 20.

(Method for manufacturing IPM motor 1)
A method for manufacturing the IPM motor 1 will be described. The IPM motor 1 includes an attaching step of attaching the adhesive sheet 40, an inserting step of inserting the permanent magnet 30, an attaching step of attaching the permanent magnet 30 to the magnet insertion hole 21, and an attaching step of attaching the rotor 3 to the stator 2. Consists of

  The affixing step is a step of affixing an adhesive sheet 40 composed of a plurality of adhesive pieces 41 to the magnet outer surface 31 that is located on the radially outer side of the rotor 3 in the outer peripheral surface of the permanent magnet 30. First, the adhesive sheet 40 to be affixed has a plurality of adhesive pieces 41 regularly placed on the film, and the outer surface 31 of the magnet is biased toward the outer surface 31 of the magnet so Affixed to the side surface 31. Thus, when the adhesive sheet 40 is transferred and affixed, air bubbles are not mixed between the magnet outer surface 31 and the adhesive piece 41 of the adhesive sheet 40 from one side in the longitudinal direction of the permanent magnet 30 to the other side. Paste gradually toward.

  Then, after all the adhesive sheets 40 have been attached, the above films are peeled off from the respective adhesive sheets 40, and the adhesive sheets 40 arranged on the films are transferred to the magnet outer surface 31. Thereby, as shown in FIG. 3, the adhesive sheet 40 is affixed to the magnet outer surface 31 of the permanent magnet 30, and the adhesive region (adhesive piece 41) in the adhesive sheet 40 is mixed in the non-adhesive region (gap portion 42). become. Further, when air bubbles are mixed between the magnet outer surface 31 and the adhesive piece 41, the adhesive piece 41 is surrounded by the gap portion 42 which is a non-adhesion region. Is possible. Moreover, the broken line of FIG. 3 has shown the external shape of the film used in order to transfer the adhesive piece 41 in the sticking process, and the whole area | region of the adhesive sheet 40. FIG.

  The insertion step is permanent so that the inner peripheral surface of the magnet insertion hole 21 and the magnet outer surface 31 to which the adhesive sheet 40 is attached are opposed to the plurality of magnet insertion holes 21 formed at equal intervals in the circumferential direction of the rotor 3. This is a step of inserting the magnets 30 respectively. In this insertion step, first, in order to prevent the permanent magnet 30 inserted into the magnet insertion hole 21 from falling off, the end plate 50 is disposed in advance only on one end side of the rotor core 20, and one side opening of the magnet insertion hole 21 is opened. Block the part. Then, the permanent magnet 30 with the adhesive sheet 40 attached is inserted from the opening on the other side of the magnet insertion hole 21. The width of the rotor 3 in the radial direction is set so that the magnet insertion hole 21 is slightly larger than the thickness of the permanent magnet 30 and the adhesive sheet 40. Thereby, when the permanent magnet 30 is inserted into the magnet insertion hole 21, the adhesive sheet 40 is prevented from being caught on the peripheral edge of the magnet insertion hole 21.

  After the end of the permanent magnet 30 is inserted to a position where it abuts the end plate 50, the permanent magnet 30 is pressed against the inner peripheral surface of the outer peripheral magnetic pole portion 23 of the rotor core 20, and the permanent magnet 30 is applied by the tack force of the adhesive sheet 40. Temporarily wear. This is repeated by the number of the magnet insertion holes 21, and the permanent magnets 30 are inserted into all the magnet insertion holes 21. However, the permanent magnets 30 inserted into the adjacent magnet insertion holes 21 are arranged so that the polarity is reversed. Then, the end plate 50 is disposed on the other end side of the rotor core 20, and the opening on the other side of the magnet insertion hole 21 is closed. The end plates 50 arranged at both ends of the rotor core 20 are caulked and fixed by fixing pins 51 that pass through the rotor core 20.

  The bonding process is a process in which the adhesive sheet 40 affixed to the magnet outer surface 31 is cured by heating and the permanent magnet 30 is bonded to the magnet insertion hole 21. As described above, the rotor 3 is assembled with the rotor core 20 supported by the end plates 50 at both ends in the axial direction with the permanent magnets 30 inserted into the respective magnet insertion holes 21. Then, by heating the rotor 3 to a predetermined temperature, the adhesive sheet 40 is cured and the permanent magnet 30 is fixed to the magnet insertion hole 21.

  The mounting step is a step of mounting the rotor 3 so as to be rotatably supported with respect to the stator 2. In the rotor 3 in which the members are integrally fixed by the bonding process, a rotating shaft that inputs and outputs driving force is inserted into and fixed to the shaft hole formed in the rotor core 20. Then, the rotor 3 is inserted inside the stator 2, and the rotor 3 is supported by bearings so that the rotor 3 can rotate with respect to the stator 2. At this time, an air gap is disposed between the inner peripheral surface of the stator 2 and the outer peripheral surface of the rotor 3, and the rotor 3 is mounted on the stator 2. Thus, the IPM motor 1 is manufactured by being assembled in each process.

(Effects of IPM motor 1)
According to the IPM motor 1 configured as described above, the adhesive sheet 40 having an adhesive region and a non-adhesive region is attached to the magnet outer surface 31 that is the outer peripheral surface of the magnet. As a result, when the adhesive sheet 40 is stuck to the magnet outer side surface 31, even if air bubbles enter between the magnet outer side surface 31 and the adhesive piece 41 of the adhesive sheet 40, the air bubbles are released from the gap portion 42 which is a non-adhesive region. Can be extracted. Therefore, it becomes possible to stick the adhesive sheet 40 to the magnet in a better state. Therefore, it is possible to prevent the adhesive force from being reduced due to the mixing of bubbles.

  The adhesive sheet 40 includes a plurality of adhesive pieces 41. Thereby, the adhesion area | region in the adhesive sheet 40 becomes plurality, and the said adhesion area | region will be mixed in a non-adhesion area | region. If it does so, since the adhesion piece 41 which forms each adhesion field is surrounded by the gap part 42, even if a bubble enters between magnet outside side 31 and adhesion sheet 40, it can extract reliably.

  More specifically, each adhesive piece 41 of the adhesive sheet 40 has a circular shape. As described above, since the adhesive sheet 40 composed of the plurality of adhesive pieces 41 is attached to the magnet outer surface 31 of the permanent magnet 30, the adhesive sheet 40 is formed as a whole by making this adhesive region circular. A polka dot pattern will be formed. Therefore, the distance from the center part of the bonding piece 41 forming the bonding area to the surrounding non-bonding area becomes constant, and the mixed bubbles can be suitably extracted.

<Modification of Embodiment>
A modification of the embodiment will be described with reference to FIGS. In the present embodiment, the adhesive sheet 40 has a plurality of circular adhesive pieces 41 and is attached to the magnet outer surface 31. On the other hand, as shown in FIG. 4, the adhesive sheet 40 may have a plurality of adhesive pieces 41 in a stripe shape. Thereby, the adhesive sheet 40 is formed in a striped pattern as a whole. With such a configuration, the distance from the central portion in the width direction of the adhesive piece 41 to the peripheral non-adhesive region (gap portion 42) is constant, and the mixed bubbles can be suitably extracted. The longitudinal direction of the band shape is set in consideration of the direction in which the film is urged in the transfer, for example, when the adhesive sheet 40 placed on the film is pasted to the magnet outer surface 31. It is good. Thereby, the adhesive sheet 40 can be affixed while removing air bubbles mixed in efficiently.

  Further, as shown in FIG. 5, the adhesive sheet 140 may have a plurality of non-adhesive regions. The adhesive sheet 140 has a plurality of holes 142 formed in the sheet main body 141. Thereby, in the adhesive sheet 140, the non-adhesion region (hole 142) is mixed in the adhesion region (sheet body 141). Then, since the hole 142 forming each non-adhesion region is surrounded by the adhesion region, and the distance from each part of the adhesion region to the non-adhesion region is shorter than the conventional one, Even when air bubbles enter between the adhesive sheets 40, they can be reliably extracted. In the modification shown in FIG. 5, if the hole 142 of the adhesive sheet 140 is circular, the adhesive sheet 140 is formed in a dot-like polka dot pattern as a whole. Thereby, since the adhesive sheet 140 forms a continuous adhesive region (sheet main body 141), it is possible to extract the mixed bubbles while facilitating sticking to the magnet outer surface 31.

  Furthermore, as a modification in which a plurality of hole portions 142 are formed in the sheet main body 141 of the adhesive sheet 140, a band-shaped hole portion 142 may be provided as shown in FIG. Thus, when the hole 142 of the adhesive sheet 140 is formed in a stripe shape, the adhesive sheet 140 is formed in a striped pattern as a whole. In addition, as shown in FIG. 7, the adhesive sheet 240 may be provided with a notch portion 242 having a stripe shape. Thereby, since the adhesive sheets 140 and 240 form a continuous adhesive region, the mixed bubbles can be extracted while facilitating the application to the magnet outer surface 31. As described above, the adhesive sheets 40, 140, and 240 need only have a bonding area and a non-bonding area, and in addition to this, only by providing a large hole at the center, compared to the conventional case. It is possible to prevent air bubbles from being mixed in the sticking step and stick the adhesive sheet to the permanent magnet 30 in a good state.

1: IPM motor (rotary electric machine) 2: Stator 3: Rotor 10: Stator core 11: Teeth 20: Rotor core 21: Magnet insertion hole 21a: Insert hole outer surface 22: Rotor core body 22a: Inner circumference 22b: magnetic pole part between magnets 23: outer peripheral magnetic pole part, 24: bridge 30: permanent magnet (magnet), 31: outer side of magnet (outer peripheral surface of magnet),
32: Magnet inner surface (peripheral surface of magnet)
40: Adhesive sheet, 41: Adhesive piece (adhesion region), 42: Gap (non-adhesion region)
140, 240: Adhesive sheet, 141, 241: Sheet body (adhesion region)
142: Hole (non-adhesion region), 242: Notch (non-adhesion region)
50: End plate, 51: Fixing pin

Claims (9)

A rotating electrical machine comprising a stator and a rotor supported rotatably with respect to the stator,
The rotor is
A plurality of insertion holes formed at equal intervals in the circumferential direction of the rotor;
A magnet inserted into each of the plurality of insertion holes;
An adhesive sheet having an adhesive region adhered to the outer peripheral surface of the magnet facing the inner peripheral surface of the insertion hole and adhering the magnet to the insertion hole, and a non-adhesive region excluding the adhesive region;
Rotating electric machine having In claim 1,
The adhesive sheet is a rotating electrical machine having a plurality of the adhesive regions. In claim 1,
The adhesive sheet is a rotating electrical machine having a plurality of the non-adhesive regions. In claim 2,
Each said adhesion | attachment area | region of the said adhesive sheet is a rotary electric machine which makes circular shape. In claim 2,
Each said adhesion | attachment area | region of the said adhesive sheet is a rotary electric machine which makes stripe shape. In claim 3,
Each non-adhesion region of the adhesive sheet is a rotary electric machine having a circular shape. In claim 3,
Each non-adhesion region of the adhesive sheet is a rotating electrical machine having a stripe shape. A method of manufacturing a rotating electrical machine comprising a stator and a rotor supported rotatably with respect to the stator,
The adhesive sheet is affixed to the outer peripheral surface of the magnet so that the adhesive region of the adhesive sheet affixed to the outer peripheral surface of the magnet and the non-adhesive region of the adhesive sheet excluding the adhesive region are mixed. Pasting process,
An insertion step of inserting the magnets into a plurality of insertion holes formed at equal intervals in the circumferential direction of the rotor so that the inner peripheral surface of the insertion hole and the outer peripheral surface of the magnet are opposed to each other;
An adhesion step of adhering the magnet to the insertion hole by the adhesive sheet affixed to the outer peripheral surface of the magnet;
A mounting step of mounting the rotor so as to be rotatably supported with respect to the stator;
A method for manufacturing a rotating electrical machine. A rotating electrical machine comprising a stator and a rotor supported rotatably with respect to the stator,
The rotor has an insertion hole formed in the rotor, a magnet inserted into the insertion hole, and an adhesive sheet that is attached to the magnet and adheres the magnet to the insertion hole,
The adhesive sheet is a rotating electrical machine having an adhesive region that is attached to the magnet and a non-adhesive region that is not attached to the magnet at a portion facing the magnet.

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