Magnetic shielding tape and rotating electric machine

Abstract

This invention provides a magnetic shielding tape that prevents a decrease in the measurement accuracy of sensors due to magnetic flux, while also enabling the miniaturization of the entire device. [Solution] The ring-shaped shield tape 80 attached to the stator coil of a rotating electric machine comprises an aluminum foil provided with a high magnetic permeability material, an adhesive sheet provided with an adhesive agent, and a plurality of slits 81 that penetrate the aluminum foil and the adhesive sheet, with the space between adjacent slits 81 being bendable.

Description

Technical Field

[0001] This invention relates to a magnetic shielding tape and a rotating electric machine having the magnetic shielding tape.

Background Art

[0002] As a rotating electric machine having a shield plate for magnetic shielding of a sensor, for example, a rotating electric machine described in Patent Document 1 is known. This rotating electric machine includes a stator, a rotor, an electromagnetic brake that brakes the rotation of the rotor, a shaft coupled to the rotor, a rotating disk provided on the shaft, a magnetic sensor that detects the rotation direction of the rotor by detecting the rotation of the rotating disk, and a magnetic shield plate formed of a metal plate that is disposed between the magnetic sensor and the electromagnetic shield and magnetically shields the magnetic sensor. The magnetic shield plate blocks the magnetic flux generated from the electromagnetic brake and magnetically shields the magnetic sensor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the rotating electric machine of Patent Document 1, since the magnetic shield plate formed of a metal plate is disposed between the electromagnetic brake and the magnetic sensor, there is a problem that the entire rotating electric machine becomes large-sized.

[0005] This invention has been made to solve such problems, and an object thereof is to provide a magnetic shielding tape that can prevent a decrease in the measurement accuracy of a sensor due to magnetic flux and can reduce the size of an entire apparatus such as a rotating electric machine.

Means for Solving the Problems

[0006] To solve the above problems, the magnetic shielding tape according to this invention comprises a high-permeability material layer provided with a high-permeability material, an adhesive layer provided with an adhesive, and a plurality of notches provided that penetrate the high-permeability material layer and the adhesive layer, with the spaces between adjacent notches being bendable.

[0007] Furthermore, the entire structure may be formed in a ring shape or a partially ring shape, and the notches may be formed along the radial direction. Furthermore, the notched portion may be connected to either the outer diameter portion or the inner diameter portion. Furthermore, the notch may have a first notch connected to the outer diameter and a second notch connected to the inner diameter, and the inner diameter side end of the first notch and the outer diameter side end of the second notch may be formed to be non-facing along the radial direction. Furthermore, the notch portion may have a first notch portion connected to the outer diameter portion and a second notch portion connected to the inner diameter portion, and the inner diameter side end of the first notch portion and the outer diameter side end of the second notch portion may be formed to face each other along the radial direction. Furthermore, the overall shape may be rectangular, with the notched portion connected to one side and extending perpendicularly to that side. Furthermore, the overall shape may be rectangular, and the notches may include a third notch connected to one side and extending perpendicularly to that side, and a fourth notch connected to the side opposite to that side and extending perpendicularly to that side, wherein the third and fourth notches may be formed in a non-facing orientation. Furthermore, the overall shape may be rectangular, and the notches may include a third notch connected to one side and extending perpendicularly to that side, and a fourth notch connected to the side opposite to that side and extending perpendicularly to that side, with the third and fourth notches being formed to face each other. Furthermore, the notch may have a fifth notch connected to each side that extends perpendicularly to one side, and a sixth notch.

[0008] Furthermore, the rotating electric machine according to this invention comprises a case, a stator provided inside the case, a rotating shaft rotatably mounted in the case, a rotor provided inside the case and rotatably mounted together with the rotating shaft, a motor coil provided on at least one of the stator and the rotor, and any of the magnetic shielding tapes described above, wherein the adhesive layer of the magnetic shielding tape is adhered to at least one of the case, rotor, stator, and motor coil.

[0009] The system may also include a rotation sensor for detecting the rotation of the rotor, and the adhesive layer of the magnetic shielding tape may be attached to at least one of the case, rotor, stator, motor coil, and rotation sensor.

[0010] Furthermore, the rotating electric machine according to this invention comprises a case, a stator provided inside the case, a rotating shaft rotatably provided in the case, a rotor provided inside the case and rotatably provided together with the rotating shaft, a motor coil provided on at least one of the stator and the rotor, and any of the magnetic shielding tapes described above, wherein the magnetic shielding tapes are arranged to shield at least a portion of the magnetic flux generated by the motor coil. [Effects of the Invention]

[0011] The magnetic shielding tape of this invention comprises a high-permeability material layer provided with a high-permeability material, an adhesive layer provided with an adhesive, and a plurality of notches provided that penetrate the high-permeability material layer and the adhesive layer. Since the space between adjacent notches is formed to be bendable, it prevents a decrease in the measurement accuracy of the sensor due to magnetic flux and allows for miniaturization of the entire device. [Brief explanation of the drawing]

[0012] [Figure 1] This is a cross-sectional view of a servo motor according to Embodiment 1 of the present invention. [Figure 2] Figure 1 is a side view of the stator coil. [Figure 3] It is a partial schematic view of the stator shown in FIG. 1. [Figure 4] It is a front view of the annular shield tape shown in FIG. 1. [Figure 5] It is a cross-sectional view taken along line A-A' of the annular shield tape shown in FIG. 4. [Figure 6] It is a front view of the annular shield tape according to Embodiment 2 of this invention. [Figure 7] It is a front view of the annular shield tape according to Embodiment 3 of this invention. [Figure 8] It is a front view of the annular shield tape according to Embodiment 4 of this invention. [Figure 9] It is a front view of the annular shield tape according to Embodiment 5 of this invention. [Figure 10] It is a side view of the stator coil according to Embodiment 5 of this invention. [Figure 11] It is a front view of the annular shield tape according to Embodiment 6 of this invention. [Figure 12] It is a side view of the stator coil according to Embodiment 7 of this invention. [Figure 13] It is a side view of the stator coil according to Embodiment 8 of this invention.

Embodiments for Carrying Out the Invention

[0013] Embodiment 1. Hereinafter, Embodiment 1 of this invention will be described based on FIGS. 1 to 4 of the accompanying drawings. In addition, the same or equivalent parts as those of the conventional example described in Patent Document 1 will be denoted by the same reference numerals and described. FIG. 1 is a cross-sectional view of a servo motor according to this Embodiment 1. The servo motor 10 is an AC servo motor, and a cylindrical stator 30 is provided inside its cylindrical case 20. The stator 30 has a stator coil 31 formed in an annular shape when viewed from the direction of the rotation shaft 40. Note that the stator coil 31 constitutes the motor coil. Further, the servo motor 10 constitutes a rotating electric machine.

[0014] A rotating shaft 40 is provided at the radial center of the case 20. One end of the rotating shaft 40 protrudes outside the case 20, forming an output shaft. The rotating shaft 40 is rotatably supported by a bearing 41 provided at one end inside the case 20 and another bearing 41 provided at the other end. Furthermore, a rotor 50, located inside the stator 30, is rotatably mounted on the rotating shaft 40. Permanent magnets are provided on the rotor 50.

[0015] Furthermore, a known resolver 70 is provided inside the case 20, adjacent to the stator 30 and rotor 50 along the direction in which the rotating shaft 40 extends. That is, the resolver 70 is positioned opposite the stator 30 and rotor 50 along the axial direction of the rotating shaft 40. The resolver 70 has a rotating shaft 40 common to the rotor 50 and detects the rotational position and rotational speed of the rotating shaft 40. The resolver 70 has a cylindrical shape that extends along the rotating shaft 40. The resolver 70 constitutes a rotation sensor.

[0016] The resolver 70 has a stator transformer 71 positioned radially outward and a rotor transformer 73 positioned radially inward, on the side closer to the stator 30 and rotor 50. The stator transformer 71 has a stator transformer coil 72. The rotor transformer 73 has a rotor transformer coil 74. The resolver 70 also has a resolver stator 75 positioned adjacent to the stator transformer 71 and a resolver rotor 77 positioned adjacent to the rotor transformer 73, on the side further away from the stator 30 and rotor 50. That is, the resolver stator 75 is positioned radially outward and the resolver rotor 77 is positioned radially inward. The resolver stator 75 has a resolver stator coil 76 and the resolver rotor 77 has a resolver rotor coil 78.

[0017] A ring-shaped shielding tape 80 is attached to the coil-facing portion 31a of the stator coil 31, which is the side facing the resolver 70. The ring-shaped shielding tape 80 is a shielding tape formed by bonding aluminum foil, which constitutes the electromagnetic shield, with an adhesive sheet that forms the adhesive surface that adheres to the coil-facing portion 31a. The ring-shaped shielding tape 80 constitutes a magnetic shielding tape.

[0018] Figure 2 is a side view of the ring-shaped shield tape 80 and stator coil 31 shown in Figure 1, viewed from the coil-facing portion 31a side of the stator coil 31. The stator 30 has a plurality of protruding magnetic poles 33 formed to protrude radially from the radially outer side to the radially inner side. The stator coil 31 is wound around each protruding magnetic pole 33. The coil-facing portion 31a is arranged in a ring shape as a whole. The ring-shaped shield tape 80 is formed in a ring shape coaxial with the coil-facing portion 31a. The ring-shaped shield tape 80 is attached so as to cover most of the area of ​​the coil-facing portion 31a facing the resolver 70 (see Figure 1).

[0019] The ring-shaped shield tape 80 is provided with a plurality of slits 81 to facilitate application to the coil-facing portion 31a. Each slit 81 is formed radially from the radially outer side of the ring-shaped shield tape 80, and the slits 81 are arranged at equal angular intervals from each other. Furthermore, the slits 81 are formed by penetrating the aluminum foil and the adhesive sheet. The slits 81 constitute notches.

[0020] Cables 32 connected to the windings of each phase are drawn out from a portion of the stator coil 31. At the portion where these cables 32 are drawn out, a shield tape piece 84, which is part of the ring-shaped shield tape 80, is bent along the direction in which the cables 32 are drawn out.

[0021] Figure 3 is a schematic partial view of the stator 30 shown in Figure 1. This Figure 3 is a view of the end of the stator 30 on the side to which the ring-shaped shield tape 80 is attached, viewed from a direction perpendicular to the direction in which the rotation axis 40 extends. The ring-shaped shield tape 80 is attached to the coil-facing portion 31a of the stator coil 31 of the stator 30 so that its radially outer side is folded. The outer diameter portion of the ring-shaped shield tape 80 is attached to the outer diameter portion of the stator coil 31, and the inner diameter portion of the ring-shaped shield tape 80 is attached to the coil-facing portion 31a. Since the ring-shaped shield tape 80 has multiple slits 81, its outer diameter portion can be easily attached along the outer diameter portion of the stator coil 31.

[0022] Figure 4 is a front view of the ring-shaped shield tape 80 shown in Figure 1. The ring-shaped shield tape 80 shown in Figure 4 is not attached to the stator coil 31. The slits 81 of the ring-shaped shield tape 80 are formed radially from the outer diameter portion 82, and the inner diameter end of the slit 81 is formed at a distance from the inner diameter portion 83 of the ring-shaped shield tape 80. Each slit 81 is arranged at equal angular intervals in the circumferential direction. Shield tape pieces 84 are formed between each slit 81.

[0023] Figure 5 is a cross-sectional view of the ring-shaped shield tape 80 shown in Figure 4, taken along line A-A'. The ring-shaped shield tape 80 is a thin-film tape member formed by bonding aluminum foil 85, which constitutes the electromagnetic shield, with an adhesive sheet 86 that adheres to the coil-facing portion 31a. Each shield tape piece 84 (see Figure 4) is formed to be bendable on either the aluminum foil 85 side or the adhesive sheet 86 side. The aluminum foil 85 constitutes a high-permeability material layer. The adhesive sheet 86 constitutes an adhesive layer.

[0024] Next, the effects of the ring-shaped shield tape 80 in this embodiment 1 will be explained. As shown in Figure 1, the ring-shaped shield tape 80 is attached to the ring-shaped coil-facing portion 31a of the stator coil 31 on the side facing the resolver 70. By providing the ring-shaped shield tape 80 between the stator coil 31 and the resolver, electromagnetic noise generated from the stator coil 31 is magnetically shielded, reducing electromagnetic noise entering the resolver 70 and preventing or suppressing a decrease in the measurement accuracy of the resolver.

[0025] Conventional servo motors employ various configurations to block magnetic flux leakage from the stator coil to the resolver. These include covering the entire resolver with a metal plate as an electromagnetic shield, placing metal plates near the coil-facing and resolver-facing sections, providing a cover for the coil-facing section and plating it with electromagnetic shielding material, and plating the resolver-facing section with electromagnetic shielding material. However, adopting these configurations carries the risk of increasing the overall size of the servo motor and increasing the number of parts to be manufactured.

[0026] On the other hand, since the ring-shaped shield tape 80 of this embodiment 1 is a thin-film tape member, it has the advantage of allowing the servo motor 10 to be made smaller than when a metal plate with thickness, such as an aluminum plate, is used as an electromagnetic shield.

[0027] Furthermore, as shown in Figures 2 to 4, the annular shield tape 80 has slits 81, so when it is attached to the coil-facing portion 31a of the stator coil 31, the outer diameter portion 82 can be easily attached to the curved surface portion along the circumferential direction or the curved surface portion along the radial direction of the outer diameter portion of the stator coil 31. In addition, although the coil-facing portion 31a has irregularities due to the winding of the coil, the annular shield tape 80 has multiple slits 81, so the annular shield tape 80 can be attached to conform to the irregularities caused by the winding of the coil. Moreover, even if the cable 32 protrudes from the stator coil 31, the annular shield tape 80 can be attached with a part of it peeled up to match the protruding portion of the cable 32, and there is no need to drill holes in a part of the annular shield tape 80 to pass the cable 32 through, which has the advantage of reducing the assembly man-hours of the servo motor 10.

[0028] As described above, the ring-shaped shield tape 80 according to this embodiment 1 comprises an aluminum foil 85 provided with a high magnetic permeability material, an adhesive sheet 86 provided with an adhesive, and a plurality of slits 81 provided through the aluminum foil 85 and the adhesive sheet 86. Since the space between adjacent slits 81 is formed to be bendable, it prevents a decrease in the measurement accuracy of the resolver 70 due to the magnetic flux generated from the servo motor 10, and also allows for miniaturization of the entire servo motor 10.

[0029] Furthermore, since the ring-shaped shield tape 80 is formed in a ring shape overall, and the slit 81 is formed along the radial direction, it can be attached along the coil-facing portion 31a of the stator coil 31 and the outer shape of the stator 30.

[0030] Furthermore, since the slit 81 is connected to the outer diameter portion 82, the ring-shaped shield tape 80 can be attached along the coil-facing portion 31a of the stator coil 31 and the outer shape of the stator 30.

[0031] Furthermore, the servo motor 10 comprises a case 20, a stator 30 provided inside the case 20, a rotating shaft 40 rotatably mounted on the case 20, a rotor 50 provided inside the case 20 and rotatably mounted together with the rotating shaft 40, a stator coil 31 provided on the stator 30, and a ring-shaped shield tape 80. Since the adhesive sheet 86 of the ring-shaped shield tape 80 is adhered to the stator coil 31, leakage of magnetic flux generated from the stator coil 31 is shielded, and the servo motor 10 as a whole can be made smaller.

[0032] Furthermore, the servo motor 10 is further equipped with a resolver 70, and since the ring-shaped shield tape 80 is provided on the stator coil 31, it is possible to suppress a decrease in the measurement accuracy of the resolver 70.

[0033] Furthermore, the servo motor 10 comprises a case 20, a stator 30 provided inside the case 20, a rotating shaft 40 rotatably mounted on the case 20, a rotor 50 provided inside the case 20 and rotatably mounted together with the rotating shaft 40, a stator coil 31 provided on the stator 30, and a ring-shaped shield tape 80. The ring-shaped shield tape 80 is arranged to shield at least a portion of the magnetic flux generated by the stator coil 31, thereby suppressing a decrease in the measurement accuracy of the resolver 70 due to leakage of magnetic flux generated from the stator coil 31.

[0034] In this embodiment 1, the number of slits 81 was 18 as shown in Figure 4. However, this number of slits 81 is illustrative, and any number of slits 81 may be provided that is suitable for the shape of the object to which the ring-shaped shield tape 80 is attached.

[0035] Furthermore, in this embodiment 1, a servo motor 10 having a resolver 70 was used as the rotation sensor, but the motor configuration is not limited to this, and other types of rotation sensors such as rotary encoders may be used as the rotation sensor, or other types of motors such as stepping motors may be used instead of servo motors.

[0036] Furthermore, in this embodiment 1, the servo motor 10 was a motor in which the stator 30 has stator coils 31 that constitute the motor coils, but it may also be a motor in which the rotor 50 has motor coils, or a motor in which both the stator 30 and the rotor 50 have motor coils.

[0037] Furthermore, in this embodiment 1, the ring-shaped shield tape 80 was provided on the coil-facing portion 31a, but it may also be provided on the resolver-facing portion 70a. This further reduces the magnetic flux entering the resolver 70.

[0038] Embodiment 2. Next, the configuration of the shield tape according to Embodiment 2 of this invention will be described. In Embodiment 2, the same reference numerals as those in Figures 1 to 4 indicate the same or similar components, so a detailed explanation of them will be omitted. Embodiment 2 is a modification of Embodiment 1 in which the shape of the shield tape is changed. Figure 6 is a front view of the second ring-shaped shield tape according to Embodiment 2. The second ring-shaped shield tape 80a has a plurality of outer diameter side slits 81a extending radially from the outer diameter portion 82 and a plurality of inner diameter side slits 81b extending radially from the inner diameter portion 83.

[0039] The inner diameter end of the outer diameter slit 81a is formed at a distance from the inner diameter portion 83. Similarly, the outer diameter end of the inner diameter slit 81b is formed at a distance from the outer diameter portion 82. The outer diameter slits 81a and inner diameter slits 81b are arranged at equal angular intervals along the circumferential direction, and each inner diameter slit 81b is positioned at an intermediate position between the outer diameter slits 81a. That is, along the circumferential direction of the second ring-shaped shield tape 80a, the inner diameter portion 83 end of the outer diameter slit 81a and the outer diameter portion 82 end of the inner diameter slit 81b are arranged alternately at equal angular intervals so as not to face each other. Shield tape pieces 84a are formed between each outer diameter slit 81a, and shield tape pieces 84b are formed in each inner diameter slit 81b. Each shield tape piece 84a and each shield tape piece 84b are formed to be bendable on either the aluminum foil side or the adhesive side. The other configurations are the same as in Embodiment 1.

[0040] As described above, the ring-shaped shield tape 82a according to this second embodiment has an outer diameter slit 81a connected to the outer diameter portion 82 and an inner diameter slit 81b connected to the inner diameter portion 83, and the end of the outer diameter slit 81a on the inner diameter portion 83 side and the end of the inner diameter slit 81b on the outer diameter portion 82 side are formed to be non-facing along the radial direction, so that it can be attached in a state that is more conforming to the outer shape of the stator 30.

[0041] Embodiment 3. Next, the configuration of the shield tape according to Embodiment 3 of this invention will be described. This Embodiment 3 is a modification of Embodiment 1 in which the shape of the shield tape is changed. Figure 7 is a front view of the ring-shaped shield tape according to Embodiment 3. The ring-shaped shield tape 80b has a plurality of outer diameter side slits 81a extending radially from the outer diameter portion 82 and a plurality of inner diameter side slits 81b extending radially from the inner diameter portion 83.

[0042] The outer diameter slits 81a and inner diameter slits 81b are arranged at equal angular intervals along the circumferential direction, and each inner diameter slit 81b and the outer diameter slit 81a are positioned opposite each other. That is, the inner diameter end of the outer diameter slit 81a and the outer diameter end of the inner diameter slit 81b are formed to face each other and be spaced apart along the radial direction. Each shield tape piece 84a and each shield tape piece 84b are formed to be bendable on either the aluminum foil side or the adhesive side. The other configurations are the same as in Embodiment 1.

[0043] As described above, the ring-shaped shield tape 80b according to this third embodiment has an outer diameter side slit 81a connected to the outer diameter portion 82 and an inner diameter side slit 81b connected to the inner diameter portion 83. The inner diameter side end of the outer diameter side slit 81a and the outer diameter side end of the inner diameter side slit 81b are formed to face each other along the radial direction, so that it can be attached in a state that is more closely suited to the outer shape of the stator 30.

[0044] Embodiment 4. Next, the configuration of the rotating electric machine according to Embodiment 4 of this invention will be described. This Embodiment 4 is modified from Embodiment 1 in which the shape of the shield tape is changed to a partially ring-shaped shape. Figure 8 is a front view of a partially ring-shaped shield tape according to Embodiment 4. The partially ring-shaped shield tape 80c has a shape obtained by cutting a ring-shaped shield tape into a partially ring shape with a center angle θ of 90 degrees. The partially ring-shaped shield tape 80c also has slits 81 formed radially from the radially outer side and arranged at equal angular intervals from each other. The slits 81 are formed radially from the outer diameter portion 82, and the inner diameter end of the slit 81 is formed separately from the inner diameter portion 83 of the partially ring-shaped shield tape 80c. Shield tape pieces 84 are formed between each slit 81. The other configurations are the same as in Embodiment 1.

[0045] As described above, the partially ring-shaped shield tape 80c according to this fourth embodiment is formed in a partially ring shape, and the slit 81 is formed along the radial direction. Therefore, for example, if the area where shield tape needs to be applied to the coil-facing portion 31a of the stator coil 31 (see Figure 1) is not a complete ring but a partially ring, a partially ring-shaped shield tape that fits such an area can be applied.

[0046] In this embodiment 4, the partial ring-shaped shield tape 80c had a central angle θ of 90 degrees, but this central angle θ can be any suitable angle that is appropriate for the shape and area of ​​the area where the shield tape is applied.

[0047] Embodiment 5. Next, the configuration of the shield tape according to Embodiment 5 of this invention will be described. In Embodiment 5, the shape of the shield tape is changed to a rectangle compared to Embodiment 1. Figure 9 is a front view of a rectangular shield tape according to this 5th embodiment. The rectangular shield tape 80d has a pair of long sides 87 and a pair of short sides 88. On one of the long sides 87, a plurality of slits 81 are provided at equal intervals perpendicular to the long side 87. The ends of the slits 81 are formed spaced apart from the other long side 87. Shield tape pieces 84 are formed between the slits 81 and the short sides 88 and between the slits 81 themselves. The other configurations are the same as in the 1st embodiment.

[0048] Figure 10 shows an example of the application of the rectangular shielding tape 80d shown in Figure 9. The rectangular shielding tape 80d is applied to the cable 32 that protrudes from the surface of the coil-facing portion 31a of the stator 30. Since the rectangular shielding tape 80d is provided with a slit 81, it can be applied along the shape of the cable 32. As a result, the cable 32 can be magnetically shielded by the rectangular shielding tape 80d even in locations where it is difficult to apply the ring-shaped shielding tape 80.

[0049] As described above, the rectangular shield tape 80d according to this embodiment 5 is formed in a rectangular shape overall, and the slit 81 is connected to the long side portion 87 and extends perpendicularly to the long side portion 87, so that magnetic shielding can be flexibly performed in positions where it is difficult to attach a ring-shaped shield tape.

[0050] The rectangular shield tape 80d may be appropriately provided on the resolver-facing portion 70a of the servo motor 10 shown in Figure 1, or on the inner surface of the case 20 where magnetic shielding is required. If a brake device is provided on the servo motor, it may also be appropriately provided on the end face of the brake device. Furthermore, the rectangular shield tape 80d may be appropriately combined with the ring-shaped shield tape and the partially ring-shaped shield tape described in Embodiments 1 to 4.

[0051] Embodiment 6. Next, the configuration of the shield tape according to Embodiment 6 of this invention will be described. Embodiment 5 is a modification of Embodiment 6 in which the slit configuration is changed. Figure 11 is a front view of a rectangular shield tape according to this 5th embodiment. The rectangular shield tape 80e has a pair of long sides 87 and a pair of short sides 88. On one of the long sides 87, a plurality of first slits 81c are provided at equal intervals perpendicular to the long side 87. On the other long side 87, a plurality of second slits 81d are provided at equal intervals perpendicular to the long side 87. The ends of the first slits 81c are formed at a distance from the other long side 87. The ends of the second slits 81d are also formed at a distance from one of the long sides 87. The first slits 81c and the second slits 81d are arranged at equal intervals, and each second slit 81d is positioned at an intermediate position between the first slits 81c. That is, the ends of the first slits 81c on the other long side 87 and the ends of the second slits 81d on one of the long sides 87 are arranged alternately at equal angular intervals so that they do not face each other. The other configurations are the same as in Embodiment 5.

[0052] As described above, the rectangular shield tape 80e according to this embodiment 6 is formed in a rectangular shape overall, and has a first slit 81c connected to one side and extending perpendicularly to that side, and a second slit 81d connected to the side opposite to the first slit and extending perpendicularly to that side. Since the first slit 81c and the slit 81d are formed in a non-facing direction, magnetic shielding can be flexibly performed in positions where it is difficult to attach a ring-shaped shield tape.

[0053] Embodiment 7. Next, the configuration of the shield tape according to Embodiment 7 of this invention will be described. Embodiment 5 is a modification of Embodiment 5 in which the slit configuration is changed. Figure 12 is a front view of a rectangular shield tape according to this embodiment 7. The rectangular shield tape 80f has a pair of long sides 87 and a pair of short sides 88. On one of the long sides 87, a plurality of first slits 81c are provided at equal intervals perpendicular to the long side 87. On the other long side 87, a plurality of second slits 81d are provided at equal intervals perpendicular to the long side 87. The first slits 81c and the second slits 81d are arranged at equal intervals so as to face each other, and the ends of the first slits 81c are formed spaced apart from the ends of the second slits 81d. The other configurations are the same as in embodiment 5.

[0054] As described above, the rectangular shield tape 80f according to this embodiment 7 is formed in a rectangular shape overall, and has a first slit 81c connected to one side and extending perpendicularly to that side, and a second slit 81d connected to the side opposite to the first slit 81c and extending perpendicularly to that side. Since the first slit 81c and the second slit 81d are formed to face each other, magnetic shielding can be flexibly performed in positions where it is difficult to attach a ring-shaped shield tape.

[0055] Embodiment 8. Next, the configuration of the shield tape according to Embodiment 8 of this invention will be described. Embodiment 5 is a modification of Embodiment 7 in which the slit configuration is changed. Figure 12 is a front view of the rectangular shield tape according to this embodiment 8. The arrangement of the first slit 81c and the second slit 81d of the rectangular shield tape 80g is the same as in embodiment 7. Furthermore, the rectangular shield tape 80g has a third slit 81e on one short side 88 and a fourth slit 81f on the other short side 88. The third slit 81e and the fourth slit 84f are provided opposite each other. The other configurations are the same as in embodiment 7.

[0056] Thus, the rectangular shield tape 80g according to this embodiment 8 has a third slit 81e and a fourth slit 81f connected to each side that extends perpendicularly to one side, so that magnetic shielding can be flexibly performed in positions where it is difficult to attach a ring-shaped shield tape.

[0057] In this embodiment 8, the arrangement of the first slit 81c and the second slit 81d was the same as that of the first slit 81c and the second slit 81d in embodiment 7, but it may also be the same as that of the first slit 81c and the second slit 81d in embodiment 6.

[0058] The number of slits 81 in Embodiments 1 and 4 of the present invention, the outer diameter side slits 81a and inner diameter side slits 81b in Embodiments 2 and 3, the first slit 81c in Embodiment 5, the first slit 81c and second slit 81d in Embodiments 6 and 7, and the first slit 81c, second slit 81d, third slit 81e and fourth slit 81f in Embodiment 8 are illustrative examples and are not limited thereto.

[0059] Furthermore, in embodiments 1 to 8 of the present invention, the ring-shaped shield tape 80, ring-shaped shield tape 80a, ring-shaped shield tape 80b, partially ring-shaped shield tape 80c, rectangular shield tape 80d, rectangular shield tape 80e, rectangular shield tape 80f, and rectangular shield tape 80g had aluminum foil 85 constituting a high-permeability material layer, but the invention is not limited to this, and may have a high-permeability material layer formed of any other high-permeability material such as copper foil or nickel-iron alloy foil.

[0060] Furthermore, the components included in Embodiments 1 to 8 of the present invention and the components included in their modified forms can be used in appropriate combinations.

[0061] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0062] The various aspects of this disclosure are summarized below as an appendix.

[0063] (Note 1) A high permeability material layer (85) is provided with a high permeability material, An adhesive layer (86) having an adhesive agent, Multiple notches (81) are provided that penetrate the high permeability material layer and the adhesive layer. A magnetic shielding tape comprising the above, wherein the space between adjacent cut portions (81) is formed to be bendable. (Note 2) The whole is formed in a ring shape or a partially ring shape, The aforementioned notch (81) is formed along the radial direction, as described in Appendix 1, for the magnetic shielding tape. (Note 3) The magnetic shielding tape as described in Appendix 2, wherein the notched portion (81) is connected to either the outer diameter portion (82) or the inner diameter portion (83). (Note 4) The magnetic shielding tape as described in Appendix 2, wherein the notched portion has a first notched portion (81a) connected to the outer diameter portion (82) and a second notched portion (81b) connected to the inner diameter portion (83), and the inner diameter side end of the first notched portion (81a) and the outer diameter side end of the second notched portion (81b) are formed to be non-facing along the radial direction. (Note 5) The magnetic shielding tape as described in Appendix 2, wherein the notched portion has a first notched portion (81a) connected to the outer diameter portion (82) and a second notched portion (81b) connected to the inner diameter portion (83), and the inner diameter side end of the first notched portion (81a) and the outer diameter side end of the second notched portion (81b) are formed to face each other along the radial direction. (Note 6) It is formed in a rectangular shape overall, The magnetic shielding tape as described in Appendix 1, wherein the aforementioned notch (81c) is connected to one side (87) and extends perpendicularly to that side (87). (Note 7) It is formed in a rectangular shape overall, The magnetic shielding tape according to Appendix 1, wherein the notch portion has a third notch portion (81c) connected to one side (87) and extending perpendicularly to that side (87), and a fourth notch portion (81d) connected to the side (87) opposite to the one side (87) and extending perpendicularly to that opposite side (87), and the third notch portion (81c) and the fourth notch portion (81d) are formed not to face each other. (Note 8) It is formed in a rectangular shape overall, The magnetic shielding tape as described in Appendix 1, wherein the notch portion has a third notch portion (81c) connected to one side (87) and extending perpendicularly to that side (87), and a fourth notch portion (81d) connected to the side (87) opposite to the aforementioned side (87) and extending perpendicularly to that opposite side (87), and the third notch portion (81c) and the fourth notch portion (81d) are formed to face each other. (Note 9) The magnetic shielding tape according to Appendix 7 or 8, wherein the notched portion has a fifth notched portion (81e) connected to each side (88) extending perpendicularly to the side (87), and a sixth notched portion (81f). (Note 10) Case (20), A stator (30) is provided inside the case (20), A rotating shaft (40) is rotatably mounted in the case (20), A rotor (50) is provided inside the case (20) and is rotatably mounted together with the rotating shaft (40), A motor coil (31) is provided on at least one of the stator (30) and the rotor (50), Magnetic shielding tape (80) as described in any one of the appendices 1 to 9 and Equipped with, A rotating electric machine wherein the adhesive layer (86) of the magnetic shielding tape (80) is adhered to at least one of the case (20), the rotor (50), the stator (30), and the motor coil (31). (Note 11) The system further includes a rotation sensor (70) for detecting the rotation of the rotor (50), The rotating electric machine according to Appendix 10, wherein the adhesive layer (86) of the magnetic shielding tape (80) is adhered to at least one of the case (20), the rotor (50), the stator (30), the motor coil (31), and the rotation sensor (70). (Note 12) Case (20), A stator (30) is provided inside the case (20), A rotating shaft (40) is rotatably mounted in the case (20), A rotor (50) is provided inside the case (20) and is rotatably mounted together with the rotating shaft (40), A motor coil (31) is provided on at least one of the stator (30) and the rotor (50), Magnetic shielding tape (80) as described in any one of the appendices 1 to 9 and Equipped with, A rotating electric machine in which the magnetic shielding tape (80) is arranged to shield at least a portion of the magnetic flux generated by the motor coil (31). [Explanation of Symbols]

[0064] 20 Case, 30 Stator, 31 Stator coil (motor coil), 40 Rotating shaft, 50 Rotor, 70 Resolver (rotation sensor), 80 Ring-shaped shield tape (magnetic shielding tape), 81 Slit (cut section), 82 Outer diameter section, 83 Inner diameter section, 85 Aluminum foil (high permeability material layer), 86 Adhesive sheet (adhesive layer), 87 Long side section, 88 Short side section.

Claims

1. A high permeability material layer (85) is provided with a high permeability material, An adhesive layer (86) having an adhesive agent, Multiple notches (81) are provided that penetrate the high permeability material layer and the adhesive layer. A magnetic shielding tape having the above features, wherein the space between adjacent cut portions (81) is formed to be bendable.

2. The whole is formed in a ring shape or a partially ring shape, The magnetic shielding tape according to claim 1, wherein the notched portion (81) is formed along the radial direction.

3. The magnetic shielding tape according to claim 2, wherein the notched portion (81) is connected to either the outer diameter portion (82) or the inner diameter portion (83).

4. The magnetic shielding tape according to claim 2, wherein the notched portion has a first notched portion (81a) connected to the outer diameter portion (82) and a second notched portion (81b) connected to the inner diameter portion (83), and the inner diameter side end of the first notched portion (81a) and the outer diameter side end of the second notched portion (81b) are formed to be non-facing along the radial direction.

5. The magnetic shielding tape according to claim 2, wherein the notched portion has a first notched portion (81a) connected to the outer diameter portion (82) and a second notched portion (81b) connected to the inner diameter portion (83), and the end of the first notched portion (81a) on the inner diameter side and the end of the second notched portion (81b) on the outer diameter side are formed to face each other along the radial direction.

6. It is formed in a rectangular shape overall, The magnetic shielding tape according to claim 1, wherein the notched portion (81c) is connected to one side (87) and extends perpendicularly to that side (87).

7. It is formed in a rectangular shape overall, The magnetic shielding tape according to claim 1, wherein the notch portion has a third notch portion (81c) connected to one side (87) and extending perpendicularly to that side (87), and a fourth notch portion (81d) connected to the side (87) opposite to the one side (87) and extending perpendicularly to that opposite side (87), and the third notch portion (81c) and the fourth notch portion (81d) are formed not to face each other.

8. It is formed in a rectangular shape overall, The magnetic shielding tape according to claim 1, wherein the notch portion has a third notch portion (81c) connected to one side (87) and extending perpendicularly to that side (87), and a fourth notch portion (81d) connected to the side (87) opposite to the one side (87) and extending perpendicularly to that opposite side (87), and the third notch portion (81c) and the fourth notch portion (81d) are formed to face each other.

9. The magnetic shielding tape according to claim 7 or 8, wherein the notched portion has a fifth notched portion (81e) connected to each side (88) extending perpendicularly to the one side (87), and a sixth notched portion (81f).

10. Case (20) and A stator (30) is provided inside the case (20), A rotating shaft (40) is rotatably mounted in the case (20), A rotor (50) is provided inside the case (20) and is rotatably mounted together with the rotating shaft (40), A motor coil (31) is provided on at least one of the stator (30) and the rotor (50), A magnetic shielding tape (80) according to any one of claims 1 to 8 and Equipped with, A rotating electric machine in which the adhesive layer (86) of the magnetic shielding tape (80) is adhered to at least one of the case (20), the rotor (50), the stator (30), and the motor coil (31).

11. The system further includes a rotation sensor (70) for detecting the rotation of the rotor (50), The rotating electric machine according to claim 10, wherein the adhesive layer (86) of the magnetic shielding tape (80) is adhered to at least one of the case (20), the rotor (50), the stator (30), the motor coil (31), and the rotation sensor (70).

12. Case (20) and A stator (30) is provided inside the case (20), A rotating shaft (40) is rotatably mounted in the case (20), A rotor (50) is provided inside the case (20) and is rotatably mounted together with the rotating shaft (40), A motor coil (31) is provided on at least one of the stator (30) and the rotor (50), A magnetic shielding tape (80) according to any one of claims 1 to 8 and Equipped with, A rotating electric machine in which the magnetic shielding tape (80) is arranged to shield at least a portion of the magnetic flux generated by the motor coil (31).

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