WO2007080887A1 - 回転電機 - Google Patents
回転電機 Download PDFInfo
- Publication number
- WO2007080887A1 WO2007080887A1 PCT/JP2007/050159 JP2007050159W WO2007080887A1 WO 2007080887 A1 WO2007080887 A1 WO 2007080887A1 JP 2007050159 W JP2007050159 W JP 2007050159W WO 2007080887 A1 WO2007080887 A1 WO 2007080887A1
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- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- electrical machine
- rotating electrical
- holder
- machine according
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Definitions
- the present invention relates to a rotating electrical machine such as a motor and a generator, and particularly relates to a rotating electrical machine including a magnet holder having a comb-like arm.
- Patent Documents 1 and 2 there is also known a system in which a magnet is arranged on the outer periphery of a rotor core or a rotating shaft, and the mold is fixed by a nonmagnetic member.
- Patent Document 1 shows a method in which a nonmagnetic member is filled between magnets by die casting
- Patent Document 2 shows a method in which a magnet is integrally formed on the outer periphery of a rotor core using a synthetic resin. The magnet can be fixed to the rotor core or the like without using an agent.
- FIG. 13 is a perspective view showing a magnet fixing structure when a magnet holder is used.
- the magnet holder 101 in FIG. 13 is formed of a nonmagnetic material (or a member covered with a nonmagnetic material) and is fixed to the rotating shaft 107.
- the magnet holder 101 includes a holder base 102 that is fixed to a rotating shaft, and a plurality of holder arms 103 that are extended in the axial direction from one end side force of the holder base 102.
- a holder mounting groove 105 is formed on the outer periphery of the rotor core 104 along the axial direction, and the holder arm 103 is fitted and fixed to the holder mounting groove 105.
- Magnets 106 (106a, 106b) are inserted between the holder arms 103 attached to the rotor core 104 in an axial force-pressing manner, and are fixed to the outer periphery of the rotor core 104.
- Patent Document 1 Japanese Patent Laid-Open No. 5-153745
- Patent Document 2 Japanese Patent Laid-Open No. 9-19091
- Patent Document 3 Japanese Patent Application Laid-Open No. 2004-129369
- Patent Document 4 JP-A-2005-45978
- Patent Document 5 Japanese Patent Application No. 2004-210085
- the axial length of the rotor core 104 is set longer than that of the magnet 106 due to the dimensional relationship. May cause a gap G as shown in FIG. 14 in the axial direction. That is, there is a possibility that a backlash of a tolerance is generated in the axial direction of the magnet 106. If such a backlash in the thrust direction exists, the magnet 106 may be damaged due to vibration during use of the rotating electrical machine.
- a plurality of magnets are arranged in the axial direction, such as in the case of a specification with a long shaft length, there is a problem that dimensional tolerances accumulate and large backlash tends to occur.
- An object of the present invention is to provide a rotating electrical machine that can suppress backlash in the thrust direction of a magnet and can suppress variations in the mounting position of the magnet in the axial direction.
- a rotating electrical machine of the present invention includes a rotor core fixed to a rotating shaft, a plurality of magnets attached to an outer periphery of the rotor core along a circumferential direction, and a base portion fixed to the rotating shaft.
- the base portion force includes a plurality of arm members projectingly formed in the extending direction of the rotating shaft, and a magnet holder capable of accommodating and holding the magnet between the adjacent arm members.
- the base portion includes a deformation portion that is deformed by contact with an axial end portion of the magnet.
- a deformed portion that is crushed by contact with the axial end of the magnet is provided in the base portion, and the magnet is accommodated between the arm members while deforming the deformed portion. To do.
- the integration tolerances of the magnet and the rotor core are absorbed by the deformation of the deforming portion, and the backlash in the axial direction of the magnet can be suppressed, and displacement of the magnet in the axial direction can be prevented.
- a facing surface facing the axial end of the magnet is provided between the arm members adjacent to the base portion, and the deforming portion is formed on the facing surface.
- the deformed portion is crushed by contact with the axial end of the magnet. You may do it. That is, in the rotating electrical machine, a deformation portion that is crushed by contact with the axial end portion of the magnet is provided on an opposing surface that is formed between the arm members and faces the axial end portion of the magnet.
- the magnet is accommodated between the arm members while crushing the part.
- the integration tolerances of the magnet and the rotor core are absorbed by the crushing allowance of the deformed portion, and the backlash in the axial direction of the magnet is suppressed, and displacement of the magnet in the axial direction can also be prevented.
- a projection may be provided on the facing surface as the deformation portion.
- a cavity may be provided inside the protrusion, or a cavity may be provided behind the protrusion in the base portion.
- the deformable portion may be formed in the vicinity of the connection portion of the arm member with the base portion, and the deformable portion may be crushed by contact with the axial end portion of the magnet. . That is, in the rotating electrical machine, a deformed portion that is crushed by contact with the axial end of the magnet is provided at the base of the arm member, and the magnet is accommodated between the arm members while the deformed portion is crushed. As a result, accumulation tolerances such as the magnet and the rotor core are absorbed by the crushing allowance of the deformed portion, and the backlash in the axial direction of the magnet is suppressed, and displacement of the magnet in the axial direction can also be prevented.
- a bulging portion may be formed bulging in the radial direction at the base portion of the arm member as the deforming portion.
- a slit penetrating the bulging portion in the radial direction may be provided in the bulging portion, or a cavity may be provided in the bulging portion.
- a facing surface is provided between the adjacent arm members of the base portion so as to face an end portion in the axial direction of the magnet, and the deformed portion is formed on the facing surface as the deformation shaft.
- An elastic piece that is displaced in the axial direction by contact with the direction end may be provided. That is, in the rotating electrical machine, the inertial piece that is displaced between the arm members in the axial direction by the contact with the axial end of the magnet is formed on the opposing surface facing the axial end of the magnet. The magnet is accommodated between the arm members while providing and deforming the inertia piece.
- the elastic piece enters the portion of the base portion facing the elastic piece. Possible elastic piece accommodating holes may be provided.
- the rotor core fixed to the rotating shaft, the plurality of magnets attached to the outer periphery of the rotor core along the circumferential direction, the base portion fixed to the rotating shaft, and the base portion A plurality of arm members projecting in the extending direction of the rotating shaft from the arm and having a magnet holder that can accommodate and hold a magnet between adjacent arm members. Since the deformed part that deforms by contact with the axial end of the magnet is provided in the base part, by deforming the deformed part when attaching the magnet, the integration tolerance of the magnet, rotor core, etc. is reduced. It can be absorbed by deformation.
- the backlash in the axial direction of the magnet prevent damage to the magnet due to vibration, and improve the life and reliability of the rotating electrical machine.
- the backlash in the axial direction is effectively suppressed in the magnet.
- the mounting positions of the magnets can be made uniform, variations in the mounting positions of the magnets in the axial direction can be suppressed, and the motor characteristics can be stabilized.
- the integration tolerance is absorbed by the deformed part, the machining accuracy of the magnet and the like can be relaxed and the cost can be reduced.
- a facing surface facing the axial end of the magnet is provided between the adjacent arm members of the base portion, and the aforementioned deformed portion is formed on the facing surface.
- the deformed part is crushed by contact with the end of the magnet in the axial direction, so that when the magnet is installed, the deformed part is crushed to deform the integrated tolerance of the magnet, rotor core, etc. It can be absorbed by the crushing cost of the part. For this reason, the backlash in the axial direction of the magnet can be suppressed, damage to the magnet due to vibration can be prevented, and the life and reliability of the rotating electrical machine can be improved.
- the deformed portion described above is formed in the vicinity of the connecting portion with the base portion of the arm member, and the deformed portion is crushed by contact with the axial end portion of the magnet. Since the deformed portion is crushed when the magnet is attached, it is possible to absorb the accumulation tolerance of the magnet, the rotor core, etc. by the crushed allowance of the deformed portion. For this reason, the backlash in the axial direction of the magnet can be suppressed, and the magnet due to vibration It is possible to prevent the damage of the rotating electrical machine and improve the life and reliability of the rotating electrical machine.
- a facing surface facing the axial end of the magnet is provided between the adjacent arm members of the base portion, and the above-mentioned deformed portion is formed on this facing surface. Since an elastic piece that is displaced in the axial direction by contact with the end of the magnet in the axial direction is provided, the tolerance of integration of magnets, rotor cores, etc. can be reduced by displacing this inertial piece when attaching the magnet. It can be absorbed by the displacement of the inertial piece. For this reason, the backlash in the axial direction of the magnet can be suppressed, damage to the magnet due to vibration can be prevented, and the life and reliability of the rotating electrical machine can be improved.
- FIG. 1 is a cross-sectional view showing a configuration of a brushless motor that is an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the brushless motor of FIG.
- FIG. 3 is a perspective view of a magnet holder used in the brushless motor of FIG. 1.
- FIG. 4 is a front view of the magnet honoreda of FIG.
- FIG. 5 is a sectional view taken along line BB in FIG.
- FIG. 6 is a rear view of the magnetic honoreda of FIG.
- FIG. 7 is an explanatory diagram showing the configuration of the holder arm in a simplified manner.
- FIG. 8 is an enlarged view of a portion P in FIG.
- FIG. 9 (a) is a cross-sectional view taken along the line CC in FIG. 8, and (b) is a cross-sectional view taken along the line DD in FIG.
- FIG. 10 is a sectional view taken along line AA in FIG.
- FIG. 11 is an enlarged view of a portion Q in FIG.
- FIG. 12 is an explanatory view showing a modification of the magnet holder.
- FIG. 13 is a perspective view showing a magnet fixing structure when a conventional magnet holder is used.
- FIG. 14 is an explanatory view showing problems in the conventional magnet holder.
- Rubber grommet 31 Holder base (base part) Holder arm (arm member) 33 Sensor magnet mounting part Arm body 41a End
- FIG. 1 is a sectional view showing a configuration of a brushless motor (rotary electric machine) according to an embodiment of the present invention
- FIG. 2 is an exploded perspective view of the brushless motor of FIG.
- the brushless motor 1 shown in FIGS. 1 and 2 (hereinafter abbreviated as “motor 1”) is used as a drive source for the electric power steering device.
- a rotor shaft (rotating shaft) 2 of the motor 1 is connected to an input shaft of a gear box (not shown) via a joint 3.
- the rotation of the motor 1 is appropriately decelerated in the gear box and then transmitted to the steering column, and the steering force is assisted by the rotational force of the motor 1.
- the motor 1 includes a motor part 4, a sensor part 5, and a force when roughly classified.
- the motor unit 4 includes a stator 6 and a rotor 7, and a Hall element (magnetic detection element) 8 is disposed in the sensor unit 5.
- the rotor 7 is rotatably arranged inside the stator 6, and the motor 1 becomes a so-called inner rotor type brushless motor!
- the stator 6 includes a stator core 12 on which a drive coil 11 is mounted, and a metal yoke 13 that accommodates the stator core 12.
- the stator core 12 is formed by laminating metal plates made of a magnetic material, and the drive coil 11 is wound around a salient pole projecting on the inner peripheral side to form a winding.
- the yoke 13 is formed into a bottomed cylindrical shape by a magnetic material, and a bracket 14 made of aluminum die casting (or synthetic resin) is attached to the opening end side thereof.
- the rotor 7 is provided with a rotor shaft 2.
- the rotor shaft 2 is rotatably supported by bearings 15a and 15b attached to the yoke 13 and the bracket 14, respectively.
- the rotor shaft 2 has a rotor core 16 formed by laminating metal plates made of magnetic material. Is fixed.
- a segmented rotor magnet 17 is attached to the outer periphery of the rotor core 16.
- Two rotor magnets 17 (hereinafter abbreviated as magnets 17) are attached in the axial direction (17a, 17b), and six sets are arranged in the circumferential direction.
- a side plate 18 is attached to the axial end of the rotor core 16.
- a synthetic resin magnet holder 19 is further fixed to the rotor shaft 2.
- FIG. 3 is a perspective view of the magnet holder 19, FIG. 4 is a front view thereof, FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4, and FIG.
- the magnet holder 19 includes a holder base (base portion) 31 fixed to the rotor shaft 2 and a holder arm (arm member) 32 that protrudes from the holder base 31 in the axial direction. It is provided.
- a sensor magnet mounting portion 33 to which the sensor magnet 20 is mounted is notched at the end of the holder base 31.
- the holder arm 32 has a cantilever structure extending in the axial direction from the holder base 31, and includes an arm main body 41 extending in the axial direction and a bridge portion connecting the arm main body 41 and the holder base 31. It consists of 51 and.
- FIG. 7 is an explanatory view showing the configuration of the holder arm 32 in a simplified manner. As shown in FIG. 7, the circumferential width W of the bridge portion 51 is smaller than the width W of the arm body 41 (W ⁇ W).
- Cutout portions 52 are formed on both sides in the opposite direction, and side wall portions 53 are formed between adjacent bridge portions 51 with a cutout portion 52 interposed therebetween.
- the holder arm 32 is supported by the holder base 31 by a narrow bridge portion 51.
- the bridge portion 51 is elastically stretched in the circumferential direction, so that the rigidity at the arm base is suppressed to be lower than that of the magnet holder 101 shown in FIG.
- the end 41a of the arm body 41 on the bridge portion 51 side (left end side in FIG. 5) is disposed at a position away from the inner end surface (opposing surface) 53a of the side wall portion 53 in the axial direction.
- a gap 54 is formed between the end 41a and the inner end surface 53a based on the difference between W and W.
- Fig. 8 is an enlarged view of part P in Fig. 6, Fig. 9 (a) is a cross-sectional view along line CC in Fig. 8, and Fig. 9 (b) is Fig. 8 D— is a cross-sectional view along the D line.
- Fig. 8 D— is a cross-sectional view along the D line.
- the protrusion 55 is also provided with a bottom force of a recess 56 formed on the side wall 53 and having a depth of about 1.5 mm, and as shown in FIG. It is getting thinner.
- the circumferential width W of the base of the protrusion 55 is about lmm, and the radial width W is
- FIG. 10 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 11 is an enlarged view of a Q portion in FIG.
- the cross-section of the holder arm 32 is substantially T-shaped as shown in FIG. 11, and a pair of magnet holding pieces 42 are formed on the outer peripheral side of the arm main body 41 extending along the axial direction. Between the opposing magnet holding pieces 42 of the adjacent holder arm 32, a magnet housing portion 43 is formed by both the magnet holding pieces 42 and the outer peripheral surface 16a of the rotor core 16.
- the segment-shaped magnet 17 is also press-fitted into the magnet housing part 43 in the axial direction and is held in the magnet housing part 43.
- a fitting projection 44 is formed on the inner peripheral side of the arm main body 41.
- the fitting protrusion 44 is fitted into a holder mounting groove 45 formed on the outer periphery of the rotor core 16.
- the holder mounting groove 45 extends along the rotation axis direction, and is formed in six equal portions along the circumferential direction.
- the opening 45a of the holder mounting groove 45 is narrower than the bottom 45b, and the fitting protrusion 44 is also formed in a substantially trapezoidal cross section in accordance therewith.
- the magnet holding piece 42 extends from the arm main body 41 along the circumferential direction while facing the rotor core outer circumferential surface 16a with a space therebetween.
- a first contact portion 46 that comes into contact with the outer peripheral surface of the magnet 17 when the magnet 17 is attached to the magnet housing portion 43 is provided at the tip end portion of the magnet holding piece 42.
- the arm body 41 is provided with a second contact portion 47 projecting in the circumferential direction.
- the second contact portion 47 is attached to the outer periphery of the magnet 17. Contact the surface.
- a non-contact part 48 in which a gap is formed without contacting the magnet 17.
- Magnets 17 are arranged one by one in the order of magnets 17a and l7b from the free end side (right end side in FIG. 5) of the holder arm 32 to the rotor core 16 and the magnet holder 19 fixed to the rotor shaft 2. It is attached.
- the first contact portion 46 and the rotor core outer peripheral surface 16a when the magnet holding piece 42 is in a free state, it is formed slightly smaller than the thickness of the corresponding portion of the magnet 17 attached thereto.
- the distance between the second contact portions 47 facing each other in the magnet housing portion 43 is slightly smaller than the circumferential width of the magnet 17. Accordingly, the magnet 17 is axially pressed into the magnet housing portion 43 while pushing the magnet holding piece 42 outward and pressing the arm body 41 in the circumferential direction.
- the magnet 17a press-fitted between the holder arms 32 has its axial end 17c opposed to the inner end surface 53a of the side wall 53.
- the axial end 17c eventually becomes the inner end 53a. It abuts on the protrusion 55 formed on the surface.
- the magnets 17a and 17b are press-fitted as they are even after the magnet 17a contacts the protrusion 55.
- the magnet 17b is press-fitted until the magnet 17b and the rear end surface (right end surface in FIG. 1) are aligned.
- a magnet cover 21 is provided on the outside of the magnet holder 19 to hold the magnet 17 from the radial direction and to restrict the movement of the magnet 17 in the axial direction (prevention of retaining).
- each of the magnet 17 and the rotor core 16 has a dimensional tolerance.
- the dimensional tolerances are accumulated and the axial play tends to occur.
- the accumulation tolerance is absorbed by the crushing margin of the projection 55. Therefore, even in the case of a motor that uses a plurality of magnets 17 in the axial direction, such as in the case of a specification with a long shaft length, there is a problem in that the magnet 17 is damaged due to vibration without causing axial backlash in the magnet 17. Absent.
- the mounting positions of the magnets 17 arranged in the circumferential direction are aligned, the axial displacement of the magnets 17 can be prevented, and the motor characteristics are stabilized. Furthermore, since the integration tolerance is absorbed by the protrusion 55, the machining accuracy of the magnet 17 and the rotor core 16 can be relaxed, and the cost can be reduced.
- the distance between the bridge portions 51 adjacent in the circumferential direction is slightly larger than the circumferential dimension of the magnet 17a. Therefore, the end portion of the magnet 17a is accommodated in the gap portion 54 without being restricted by the holder arm 32. That is, in the motor 1, the magnet 17a is not pressed down to the base of the holder arm 32 of the magnet holder 19 without a gap, and the stress generated in the holder arm 32 when the magnet is inserted is relieved. Therefore, the magnet 17a can be easily inserted between the holder arms 32, and the magnet 17a can be reliably inserted up to the base of the holder arm 32.
- the magnet 17 press-fitted in the magnet housing part 43 in this way is held in the magnet housing part 43 by the repulsive force of the magnet holding piece 42 and the arm body 41.
- the movement of the magnet 17 in the radial direction is restricted by the first contact portion 46, and the movement in the circumferential direction is restricted by the second contact portion 47. That is, the magnet 17 is held and fixed to the rotor core outer peripheral surface 16a by the repulsive force of the magnet holder 19 that uses an adhesive. Therefore, it is possible to avoid the tensile force based on the difference in the amount of thermal deformation of each component acting on the magnet 17 when the adhesive is used, and it is possible to prevent the magnet from being cracked due to the difference in the linear expansion coefficient.
- the magnet 17 is supported at two points of the first and second contact portions 46 and 47, and the non-contact portion 48 is provided between them, the ambient temperature rises when the motor is used, and the magnet Even when 17 is thermally expanded, the holder arm 32 is not firmly restrained. Therefore, the stress generated in the magnet 17 due to the deformation constraint can be relieved, and in this respect also, the magnet can be prevented from cracking. [0037] Furthermore, since no adhesive is used, the quality of the product can be improved without problems of variations in adhesive strength depending on the bonding conditions and application amount, and deterioration of the adhesive in a high temperature environment.
- the magnet can be positioned and fixed with high accuracy, and the product characteristics can be stabilized. In this case, there is no need for a detent mechanism when positioning the magnet, the device configuration itself is simplified, and the number of assembly steps is reduced. Since the motor can be assembled only by the assembly work of press-fitting the magnet 17, there is no need for adhesive application work or adhesive curing time during the manufacturing process, and the production equipment and assembly man-hours are reduced accordingly. Is done. Therefore, it is possible to reduce the manufacturing cost including the amount of adhesive not used.
- the magnet 17 may be damaged if the magnet surface is scratched.
- the cross-sectional shape of the magnet housing portion 43 is not the same as that of the magnet 17, and is supported at two points by the first and second contact portions 46 and 47, and the non-contact portion is between them. 48 is provided to mitigate changes in pressure input due to dimensional tolerances. Therefore, even if the dimensions of the magnet 17 vary, the magnet 17 can be flexibly press-fitted into the magnet housing portion 43 with a substantially constant pressing force, and damage to the magnet during assembly can be prevented.
- a ring-shaped sensor magnet 20 is attached to the sensor magnet attachment portion 33.
- the sensor magnet mounting portion 33 is formed in a stepped shape at the outer periphery of the tip (left end in FIG. 4) of the holder base 31, and the sensor magnet 20 is externally inserted there.
- the magnetic poles of the sensor magnet 20 are magnetized with the same number of poles as the magnets 17 and are arranged at the same positions in the circumferential direction as the magnetic poles of the magnets 17.
- the magnet 17 has a 6-pole configuration, and the sensor magnet 20 is also magnetized to 6 poles in the circumferential direction accordingly.
- a magnet cover 21 is externally provided on the outside of the magnet holder 19.
- the magnet cover 21 is formed by deep drawing using a non-magnetic material such as stainless steel or aluminum.
- the magnet cover 21 is provided with a small-diameter portion 21 a that covers the sensor magnet 20 and a large-diameter portion 21 b that covers the magnet 17. Between the small diameter part 21a and the large diameter part 21b The space is a tapered part 21c.
- the magnet cover 21 is attached from the holder base 31 side to the magnet holder 19 in which the magnet 17 is accommodated and the sensor magnet 20 is attached.
- the opening end (right end side in FIGS. 1 and 2) of the magnet cover 21 is fixed by caulking so as to embrace the magnet 17b and the rear end face of the rotor core 16. Thereby, the magnet 17 is prevented from coming off in the axial direction.
- the inner diameter of the magnet cover 21 is slightly smaller than the outer diameter of the holder arm 32, and the magnet cover 21 is attached to the outside of the magnet holder 19 in a press-fit manner.
- the outer diameter of the magnet 17 attached to the rotor core outer peripheral surface 16a is smaller than the inner diameter of the magnet force bar 21.
- the magnet 17 is fixed by the magnet holder 19 even without the magnet cover 21. In order to prevent the motor from being locked when the magnet 17 is detached or cracked, the reliability is improved here.
- a magnet cover 21 is attached to the outside of 17.
- the magnet holding piece 42 is further pressed against the magnet 17 by the press-fitting of the magnet cover 21, and the magnet 17 is held and fixed more firmly.
- a Hall element 8 is disposed on the radially outer side of the sensor magnet 20.
- the hall element 8 is provided with a total of three U, V, and W phases, and is opposed to the sensor magnet 20 with a predetermined gap.
- the magnetic poles of the sensor magnet 20 are magnetized to have the same number of poles as the magnets 17, are arranged at the same circumferential positions as the magnetic poles of the magnets 17, and are fixed by the magnet cover 21.
- the magnet 17 has a 6-pole configuration, and the sensor magnet 20 is also magnetized to 6 poles in the circumferential direction accordingly. Then, the hall element 8 sends a signal in accordance with the change of the magnetic pole of the sensor magnet 20, thereby the low 7 is detected.
- the Hall element 8 is arranged side by side in the circumferential direction at the tip of the sensor holder 22 attached to the bracket 14.
- a printed circuit board 24 is attached to the outside of the sensor holder 22, and the sensor holder 22 and the printed circuit board 24 are fixed to the bracket 14 with screws 23.
- An end cap 25 is attached to the outer end portion of the bracket 14 to cover the components housed in the bracket 14 such as the printed circuit board 24 and the like.
- a power line 26 for supplying power to the drive coil 11 is also connected to the bracket 14. The power line 26 is drawn out of the motor through a rubber grommet 27 attached to the side of the bracket 14.
- the sensor magnet 20 and the Hall element 8 are used for detecting the rotational position of the rotor 7.
- a resolver rotor and a resolver may be used.
- a resolver rotor is attached to the position of the sensor magnet 20 in general.
- the resolver port is fixed to the rotor shaft 2.
- the magnet holder 19 and the magnet cover 21 are configured such that the sensor magnet mounting portion 33, the small diameter portion 21a, and the tapered portion 21c are eliminated. Then, a resolver is disposed at the site of the Hall element 8 of the bracket 14.
- the present invention can also be applied to a motor with a brush and a generator.
- the force that can fix the rotor magnet 17 to the rotor core 16 without using an adhesive may be fixed with a small amount of adhesive.
- FIG. 12 is an explanatory view showing a modified example of such a protrusion 55.
- 12 (a) and 12 (b) show that a bulging part (deformation part) 57 is provided at the base part of the holder arm 32 (near the connection part with the holder base 31), and the bulging part 57 is It is intended to be crushed.
- the slit 58 is formed through the bulging portion 57 in the radial direction, and when the magnet 17 comes into contact with the bulging portion 57, the slit 58 is crushed.
- the bulging part 57 is crushed by the shape.
- a dead end slit (cavity) 59 is drilled in the bulging portion 57 in the axial direction, and when the magnet 17 comes into contact with the bulging portion 57, the slit 59 is collapsed. Part 57 is crushed.
- FIG. 12 (c) shows a dome-shaped projection (deformed portion) 61 formed on the inner end surface 53a of the side wall.
- the protrusion 61 is hollow, and a mold hole 62 formed at the time of molding is formed behind.
- the protrusion 61 is crushed when the magnet 17 comes into contact with the protrusion 55 in the above-described embodiment, and absorbs the accumulation tolerance of the magnet 17 and the like.
- a protrusion (deformed portion) 63 is formed on the inner end face 53a of the side wall, and a cavity 64 is provided in the rear part thereof. Also in this case, when the magnet 17 comes into contact with the protrusion 63, the protrusion 63 is crushed in such a manner that the cavity 64 is crushed.
- FIG. 12 (e) is different from the above-described example.
- an inertia piece 65 is provided on the inner end surface 53a. Absorbs tolerances.
- the inner end surface 53a is provided with an elastic piece 65 formed so that the tip end portion rises in the axial direction.
- An elastic piece receiving hole 66 into which the elastic piece 65 can enter is formed in the axial direction at a portion of the inner end face 53a facing the elastic piece 65.
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- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US12/087,369 US20090001838A1 (en) | 2006-01-10 | 2007-01-10 | Rotating Electrical Machine |
DE112007000129T DE112007000129T5 (de) | 2006-01-10 | 2007-01-10 | Elektro-Drehmaschine |
JP2007553917A JP5030793B2 (ja) | 2006-01-10 | 2007-01-10 | 回転電機 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-002845 | 2006-01-10 | ||
JP2006002845 | 2006-01-10 |
Publications (1)
Publication Number | Publication Date |
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WO2007080887A1 true WO2007080887A1 (ja) | 2007-07-19 |
Family
ID=38256292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/050159 WO2007080887A1 (ja) | 2006-01-10 | 2007-01-10 | 回転電機 |
Country Status (5)
Country | Link |
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US (1) | US20090001838A1 (ja) |
JP (1) | JP5030793B2 (ja) |
CN (1) | CN101371419A (ja) |
DE (1) | DE112007000129T5 (ja) |
WO (1) | WO2007080887A1 (ja) |
Cited By (5)
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JP2010035411A (ja) * | 2008-07-04 | 2010-02-12 | Mabuchi Motor Co Ltd | センサマグネットホルダ、及び該ホルダを組み込んだモータとその製造方法 |
JP2010124521A (ja) * | 2008-11-17 | 2010-06-03 | Mitsubishi Electric Corp | インナーロータ型磁石発電機 |
JP2010141993A (ja) * | 2008-12-10 | 2010-06-24 | Mitsuba Corp | 回転電機用マグネットホルダ |
JP2011135735A (ja) * | 2009-12-25 | 2011-07-07 | Nsk Ltd | ブラシレスモータ用ロータ、ブラシレスモータ及び電動パワーステアリング装置、並びにブラシレスモータ用ロータの製造方法 |
JP2014212604A (ja) * | 2013-04-18 | 2014-11-13 | 日立オートモティブシステムズ株式会社 | モータ |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI1010817A2 (pt) * | 2009-05-22 | 2016-04-05 | Arcelik As | motor elétrico tendo um rotor de imã permanente |
DE112011101375B4 (de) * | 2010-05-02 | 2022-03-17 | Mbs Engineering Llc | Magnet- und Halteranordnung mit verbesserter Rotations- und Axialstabilität |
WO2014054150A1 (ja) * | 2012-10-04 | 2014-04-10 | 三菱電機株式会社 | 永久磁石埋込型電動機 |
JP6278333B2 (ja) | 2013-09-03 | 2018-02-14 | アイシン精機株式会社 | 電動モータ |
DE102014223330A1 (de) * | 2014-11-14 | 2016-05-19 | OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG | Rotor |
CN107196438A (zh) * | 2017-07-21 | 2017-09-22 | 佛山市威灵洗涤电机制造有限公司 | 串激电机的端部绝缘体、串激电机以及洗衣机 |
CN108039782B (zh) * | 2018-01-26 | 2024-05-24 | 深圳市振桦电机有限公司 | 磁悬浮电机 |
DE202018006077U1 (de) * | 2018-03-07 | 2019-02-20 | Nidec Corporation | Rotoreinheit und Elektromotor |
CN108599422B (zh) * | 2018-07-16 | 2020-04-10 | 珠海凌达压缩机有限公司 | 一种转子铁芯结构及压缩机 |
CN109630442A (zh) * | 2019-01-28 | 2019-04-16 | 东莞市鑫恩贝丝五金科技有限公司 | 一种风机用马达架 |
FR3141575A1 (fr) * | 2022-11-02 | 2024-05-03 | Moving Magnet Technologies | Rotor à maintien des aimants simplifié |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001251795A (ja) * | 2000-03-07 | 2001-09-14 | Toshiba Kyaria Kk | 永久磁石回転子 |
JP2005020887A (ja) * | 2003-06-26 | 2005-01-20 | Mitsuba Corp | 回転電機のマグネット固定構造及びマグネット固定方法 |
JP2005051826A (ja) * | 2003-06-02 | 2005-02-24 | Honda Motor Co Ltd | 回転電機のロータにおける永久磁石の固定構造 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4591749A (en) * | 1985-03-21 | 1986-05-27 | Ex-Cell-O Corporation | Permanent magnet rotor with interfit cage structure |
JPS62203537A (ja) * | 1986-02-28 | 1987-09-08 | Hitachi Ltd | 電動機用回転子 |
JPH0444876Y2 (ja) * | 1987-03-03 | 1992-10-22 | ||
US4850100A (en) * | 1987-12-23 | 1989-07-25 | General Electric Company | Method of making a rotor assembly |
US5053664A (en) * | 1989-01-18 | 1991-10-01 | Aisan Kogyo Kabushiki Kaisha | Motor-driven fuel pump |
JPH05153745A (ja) | 1991-11-26 | 1993-06-18 | Asmo Co Ltd | 回転磁界型電動機の回転子およびその製造方法 |
DE4331803A1 (de) * | 1993-09-18 | 1995-03-23 | Bosch Gmbh Robert | Elektronisch kommutierter Elektromotor |
US5828152A (en) * | 1995-02-07 | 1998-10-27 | Denyo Kabushiki Kaisha | Rotor with permanent magnet of generator and method of manufacturing the same |
JPH0919091A (ja) | 1995-06-30 | 1997-01-17 | Fanuc Ltd | 同期電動機のロータ |
JP3842196B2 (ja) | 2002-10-02 | 2006-11-08 | 三菱電機株式会社 | 回転電機の回転子 |
JP4200760B2 (ja) | 2002-12-27 | 2008-12-24 | 日本プラスト株式会社 | 自動車のカウルトップカバー |
JP2005045978A (ja) | 2003-07-25 | 2005-02-17 | Favess Co Ltd | モータ |
-
2007
- 2007-01-10 CN CNA2007800022719A patent/CN101371419A/zh active Pending
- 2007-01-10 WO PCT/JP2007/050159 patent/WO2007080887A1/ja active Application Filing
- 2007-01-10 JP JP2007553917A patent/JP5030793B2/ja active Active
- 2007-01-10 US US12/087,369 patent/US20090001838A1/en not_active Abandoned
- 2007-01-10 DE DE112007000129T patent/DE112007000129T5/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001251795A (ja) * | 2000-03-07 | 2001-09-14 | Toshiba Kyaria Kk | 永久磁石回転子 |
JP2005051826A (ja) * | 2003-06-02 | 2005-02-24 | Honda Motor Co Ltd | 回転電機のロータにおける永久磁石の固定構造 |
JP2005020887A (ja) * | 2003-06-26 | 2005-01-20 | Mitsuba Corp | 回転電機のマグネット固定構造及びマグネット固定方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010035411A (ja) * | 2008-07-04 | 2010-02-12 | Mabuchi Motor Co Ltd | センサマグネットホルダ、及び該ホルダを組み込んだモータとその製造方法 |
JP2010124521A (ja) * | 2008-11-17 | 2010-06-03 | Mitsubishi Electric Corp | インナーロータ型磁石発電機 |
JP2010141993A (ja) * | 2008-12-10 | 2010-06-24 | Mitsuba Corp | 回転電機用マグネットホルダ |
JP2011135735A (ja) * | 2009-12-25 | 2011-07-07 | Nsk Ltd | ブラシレスモータ用ロータ、ブラシレスモータ及び電動パワーステアリング装置、並びにブラシレスモータ用ロータの製造方法 |
JP2014212604A (ja) * | 2013-04-18 | 2014-11-13 | 日立オートモティブシステムズ株式会社 | モータ |
Also Published As
Publication number | Publication date |
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DE112007000129T5 (de) | 2008-11-13 |
CN101371419A (zh) | 2009-02-18 |
JPWO2007080887A1 (ja) | 2009-06-11 |
US20090001838A1 (en) | 2009-01-01 |
JP5030793B2 (ja) | 2012-09-19 |
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