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

Definitions

• the disclosure in this specification relates to motor components and motors.
• Patent Document 1 describes a permanent magnet motor equipped with a stator and rotor arranged radially opposite each other.
• the rotor has multiple permanent magnets arranged circumferentially.
• the permanent magnets described in Patent Document 1 are magnetized in the radial direction. As a result, the magnetic path formed by the magnetic flux of the permanent magnets tends to be formed in the radial direction. This may increase the magnetic flux on the side of the rotor equipped with the permanent magnets opposite the area facing the stator.
• One object of the present disclosure is to provide motor components and motors in which the increase in magnetic flux in specific areas is suppressed.
• the disclosed embodiment comprises: A motor component including: a plurality of motor magnets aligned in a second direction intersecting the first direction; and an interposition portion including a soft magnetic material, the interposition portion being provided between two adjacent motor magnets aligned in the second direction,
• the motor magnet is a first surface and a second surface aligned in a first direction; a first end and a second end aligned in a second direction; a plurality of orientations distributed between the first surface and the second surface and between the first end and the second end; At least a portion of the plurality of orientations has a first orientation component along a first direction and a second orientation component along a second direction;
• the first alignment component extends from one of the first surface and the second surface to the other in the first direction, is smaller on the second surface side than on the first surface side in the first direction, and is smaller on each of the first end side and the second end side than on a central portion side between the first end and the second end side in the second direction;
• the second alignment component
• the magnetic flux passing from the motor magnet through the interposed portion is prevented from decreasing.
• the function of the interposed portion as a pseudo-pole is prevented from being reduced.
• the disclosed aspects include: an exciter that is excited when current is applied; a field element aligned with the exciter in a first direction and moving relative to the exciter in a second direction intersecting the first direction, the field element includes a plurality of motor magnets aligned in the second direction, and an intervening portion provided between two adjacent motor magnets aligned in the second direction, the intervening portion forming a magnetic path through which magnetic flux passes;
• the motor magnet is a first surface and a second surface aligned in a first direction; a first end and a second end aligned in a second direction; a plurality of orientations distributed between the first surface and the second surface and between the first end and the second end; At least a portion of the plurality of orientations has a first orientation component along a first direction and a second orientation component along a second direction; the first alignment component extends from one of the first surface and the second surface to the other in the first direction, is smaller on the second surface side than on the first surface side in the first direction,
• the above motor can achieve the same effects as the above motor components.
• FIG. 2 is a plan view of the motor according to the first embodiment.
• FIG. FIG. FIG. 2 is a partial plan view of the rotor and stator unfolded so that the circumferential direction is a linear direction.
• FIG. 4 is a diagram for explaining a magnet angle.
• FIG. 10 is a diagram illustrating an example of an orientation measurement result.
• FIG. 10 is a partial plan view of a rotor according to a second embodiment.
• FIG. 11 is a plan view of a motor according to a third embodiment.
• FIG. 2 is a partial plan view of the rotor and stator unfolded so that the circumferential direction is a linear direction.
• FIG. 10 is a diagram showing the orientation of an S magnet.
• FIG. 10 is a partial plan view of a rotor according to a fourth embodiment.
• FIG. 10 is a diagram showing the orientation of an S magnet.
• FIG. 13 is a diagram showing a rotor according to a fifth embodiment, viewed from the outside in the radial direction, developed on a plane.
• FIG. 13 is a plan view of a rotor according to a sixth embodiment, viewed from the radially outer side.
• the motor 10 shown in FIG. 1 is provided in various devices and the like.
• the motor 10 drives the various devices and the like to operate them.
• the motor 10 is supplied with power from a power supply unit such as a battery.
• the motor 10 functions as an electric motor.
• the motor 10 is a multi-phase AC motor.
• the motor 10 is a motor generator.
• the motor 10 functions as a generator during regeneration.
• the motor 10 is sometimes referred to as a rotating electric machine.
• the three mutually orthogonal directions will be referred to as the axial direction AD, radial direction RD, and circumferential direction CD.
• the radial direction RD is sometimes referred to as the radial direction
• the axial direction AD is sometimes referred to as the axial direction.
• the motor 10 has a housing 11, a shaft 12, a stator 30, and a rotor 40.
• the housing 11 is made of a metal material or the like.
• the housing 11 is a housing whose outer and inner peripheral surfaces are formed in an annular shape. At least a portion of the shaft 12, the stator 30, and the rotor 40 are housed in the space surrounded by this annular inner peripheral surface.
• the stator 30 is the stator
• the rotor 40 is the rotor.
• the shaft 12 is fixed to the rotor 40.
• the shaft 12 and rotor 40 rotate relative to the stator 30.
• the shaft 12 and rotor 40 rotate about the motor axis Cm.
• the motor axis Cm extends in the axial direction AD through the center of the shaft 12 and the center of the rotor 40.
• the motor axis Cm is the rotational axis of the motor 10.
• the shaft 12 extends in the axial direction AD along the motor axis Cm.
• the rotor 40 rotates about the shaft 12.
• the shaft 12 corresponds to the rotation axis.
• the shaft 12 is rotatably supported by bearing members such as bearings.
• the motor 10 is sometimes referred to as a rotary motor that performs rotary motion.
• Motor 10 is a radial gap motor. Radial gap motors are sometimes called radial motors.
• a stator 30 and a rotor 40 are aligned in the radial direction RD.
• Motor 10 is provided with one stator 30 and one rotor 40.
• the radial gap 20 is a gap.
• the stator 30 and the rotor 40 are aligned in the radial direction RD with the radial gap 20 interposed between them.
• the rotor 40 is provided on the inner periphery of the stator 30.
• the motor 10 is a brushless motor.
• a motor 10 in which the rotor 40 is provided on the inner periphery of the stator 30 is sometimes referred to as an inner rotor type motor.
• a rotor 40 provided on the inner periphery of the stator 30 is sometimes referred to as an inner rotor.
• the stator 30 is fixed to the housing 11.
• the stator 30 extends in the circumferential direction CD along the inner circumferential surface of the housing 11.
• the stator 30 is formed in an annular shape as a whole.
• the stator 30 is an exciter that is excited when electricity is passed through it.
• the stator 30 is sometimes called an armature.
• the stator 30 has a stator core 31 and coils 35.
• the stator 30 is excited when electricity is passed through the coils 35.
• the coils 35 are formed from electric wires or the like, and can be electrified.
• the stator core 31 is an iron core.
• the stator core 31 is made of a soft magnetic material or the like.
• the stator core 31 is capable of forming a magnetic path through which magnetic flux such as interlinkage magnetic flux passes.
• the stator core 31 has core teeth 32 and a core outer periphery 33. Multiple core teeth 32 are arranged in the circumferential direction CD along the inner circumferential surface of the housing 11. Coils 35 are wound around the core teeth 32.
• the core outer periphery 33 is provided on the outer periphery of the core teeth 32.
• the core outer periphery 33 supports the core teeth 32.
• the core outer periphery 33 is fixed directly or indirectly to the housing 11.
• the core outer periphery 33 extends in the circumferential direction CD so as to span the multiple core teeth 32.
• the core outer periphery 33 is formed in an annular shape.
• the rotor 40 is a field element.
• a field element corresponds to a motor component.
• the rotor 40 corresponds to the motor component.
• the rotor 40 has a rotor core 50 and magnets 90.
• the magnets 90 generate a magnetic field.
• the magnet pieces 60 are attached to the rotor core 50 by adhesive or the like.
• the rotor core 50 is formed in an overall cylindrical shape. Multiple magnets 90 are arranged in the circumferential direction CD along the outer peripheral edge of the rotor core 50.
• the rotor core 50 has a magnet support portion 51, a holder fixing portion 52, a holder arm portion 53, and an intervening core 100.
• the magnet support portion 51, the holder fixing portion 52, the holder arm portion 53, and the intervening core 100 are integrally formed by integral molding or the like.
• the magnet support portion 51 forms the outer periphery of the rotor core 50.
• the magnet support portion 51 extends in the circumferential direction CD so as to form a ring.
• the magnet support portion 51 supports a magnet 90.
• the magnet support portion 51 corresponds to a support portion.
• the magnet 90 is fixed to the magnet support portion 51.
• the magnet 90 is provided on the outer periphery of the rotor core 50. Multiple magnets 90 are arranged along the outer periphery surface 51a of the magnet support portion 51.
• the holder fixing portion 52 forms the inner circumferential side of the rotor core 50.
• the holder fixing portion 52 extends in the circumferential direction CD so as to form an annular shape.
• the holder fixing portion 52 is provided on the inner circumferential side of the magnet support portion 51.
• the holder fixing portion 52 is fixed to the shaft 12.
• the shaft 12 is fixed to the holder fixing portion 52 while being inserted into the inner circumferential side of the holder fixing portion 52.
• the holder arm portion 53 connects the magnet support portion 51 and the holder fixing portion 52.
• the holder arm portion 53 extends in the radial direction RD so as to bridge between the magnet support portion 51 and the holder fixing portion 52.
• Multiple holder arm portions 53 are arranged in the circumferential direction CD.
• the rotor core 50 is formed from a metal material or the like. At least a portion of the rotor core 50 is formed from a soft magnetic material or the like. In the rotor core 50, at least the magnet support portion 51 and the intervening core 100 are formed from a soft magnetic material. The magnet support portion 51 and the intervening core 100 are soft magnetic bodies. In the rotor core 50, at least the magnet support portion 51 and the intervening core 100 can form a magnetic path through which magnetic flux such as interlinkage magnetic flux passes. A magnetic path is sometimes referred to as a magnetic circuit.
• the magnet support portion 51 is a back core for the magnet 90, which will be described later.
• the magnet support portion 51 and the intervening core 100 are sometimes referred to as a yoke or a yoke.
• the magnet support portion 51 and the intervening core 100 have the property of passing magnetic flux.
• the intervening core 100 extends from the magnet support portion 51 toward the outer periphery.
• the intervening core 100 is a convex portion provided on the outer peripheral surface 51a.
• the intervening core 100 is formed integrally with the magnet support portion 51.
• Multiple intervening cores 100 are arranged in the circumferential direction CD along the outer peripheral surface 51a.
• a magnet 90 is provided between two intervening cores 100 adjacent in the circumferential direction CD.
• the intervening cores 100 position the magnet pieces 60 at least in the circumferential direction CD.
• the intervening cores 100 correspond to an intervening portion.
• the rotor 40 has a field ring portion 70.
• the field ring portion 70 is formed by magnets 90 and intervening cores 100.
• multiple magnets 90 and intervening cores 100 are arranged in a ring shape.
• the magnets 90 and intervening cores 100 are arranged alternately one by one in the circumferential direction CD.
• the field ring portion 70 is formed in an annular or ring shape and extends in the axial direction AD.
• the field ring portion 70 is included in a motor component.
• the field ring portion 70 has an annular outer peripheral surface 71, an annular inner peripheral surface 72, a first annular surface 73, and a second annular surface 74. Surfaces 71 to 74 are included in the outer surface of the field ring portion 70.
• the annular outer surface 71 is the outer surface of the field annular portion 70. When viewed in a plane with the field annular portion 70 seen from the axial direction AD, the annular outer surface 71 extends in the circumferential direction CD along the outer peripheral edge of the field annular portion 70. For example, the annular outer surface 71 forms the outer peripheral end of the field annular portion 70.
• the annular inner surface 72 is the inner peripheral surface of the field annular portion 70. When viewed in a plane, the annular inner surface 72 extends in the circumferential direction CD along the inner peripheral edge of the field annular portion 70. For example, the annular outer surface 71 forms the inner peripheral end of the field annular portion 70. Both the outer peripheral end and the inner peripheral end of the field annular portion 70 are circular.
• the outer peripheral end and the inner peripheral end each form an arc.
• the outer peripheral end and the inner peripheral end are concentric.
• the center of the annular outer peripheral surface 71 and the center of the annular inner peripheral surface 72 are both located at positions through which the motor axis Cm passes.
• first annular surface 73 and the other is a second annular surface 74.
• the annular surfaces 73, 74 extend in a direction perpendicular to the axial direction AD.
• the first annular surface 73 and the second annular surface 74 extend parallel to each other.
• the first annular surface 73 and the second annular surface 74 are aligned in the axial direction AD via the annular outer peripheral surface 71 and the annular inner peripheral surface 72.
• the annular outer peripheral surface 71 and the annular inner peripheral surface 72 extend in the axial direction AD so as to span the first annular surface 73 and the second annular surface 74.
• the field ring portion 70 is a component that constitutes part of the motor 10.
• the field ring portion 70 is fixed to the magnet support portion 51.
• the component in which the field ring portion 70 and the magnet support portion 51 are integrated is sometimes referred to as a motor component.
• the field annular portion 70 has a plurality of magnets 90. These magnets 90 are lined up in the circumferential direction CD along the outer peripheral surface of the magnet support portion 51. Each of the magnets 90 extends in the axial direction AD, and the magnets 90 are not lined up in the axial direction AD. The magnets 90 form the first annular surface 73 and the second annular surface 74 of the field annular portion 70. Note that a configuration in which the magnets 90 are lined up in the axial direction AD can also be used.
• a magnetic field is generated as current flows through the coil 35.
• multiple magnetic fluxes MF are passed between the stator 30 and the rotor 40.
• the magnetic path through which this magnetic flux MF passes is determined by the magnetic flux emitted from each of the stator 30 and the rotor 40, as well as the surrounding housing 11.
• the magnetic flux passes through the core teeth 32, the core outer periphery 33, etc.
• the magnetic flux passes through the magnet 90, the magnet support portion 51, etc.
• the multiple magnetic fluxes MF include a first magnetic flux MF1 and a second magnetic flux MF2.
• the magnetic fluxes MF1 and MF2 flow from the stator 30 toward the rotor 40.
• the magnetic fluxes MF1 and MF2 then make a U-turn at the rotor 40 and flow from the rotor 40 toward the stator 30.
• the magnetic fluxes MF1 and MF2 flow so as to be passed between the two core teeth 32 via the field annular portion 70.
• the first magnetic flux MF1 does not extend beyond the field annular portion 70 to the side opposite the core teeth 32 in the radial direction RD.
• the first magnetic flux MF1 and the second magnetic flux MF2 coexist.
• the magnetic path through which the first magnetic flux MF1 passes is a closed magnetic path within the field annular portion 70.
• the magnetic path through which the second magnetic flux MF2 passes is a magnetic path that passes through the magnet support portion 51 (back core).
• the orientation OR of magnet 90 is set so that the number of second magnetic fluxes MF2 is reduced.
• the orientation OR of magnet 90 is also set so that the number of first magnetic fluxes MF1 is increased.
• the orientation OR is set so that magnetic flux MF, such as interlinkage magnetic flux, is concentrated near the center of magnet 90.
• the orientation OR is also the orientation of field annular portion 70.
• the orientation OR faces the direction of easy magnetization in magnet 90.
• the direction of easy magnetization is the direction in which magnet 90 is easily magnetized.
• the orientation OR is sometimes referred to as magnet orientation.
• the presence of orientation OR in magnet 90 is sometimes expressed as magnet 90 having multiple orientations OR. Magnet 90 is sometimes referred to as an anisotropic magnet.
• the orientation OR as a whole faces in the circumferential direction CD.
• the orientation OR is not inclined toward the axial direction AD with respect to the radial direction RD.
• at least some of the orientation OR are inclined toward the circumferential direction CD with respect to the radial direction RD.
• the orientation OR is indicated by a hollow arrow. The hollow arrow indicates the direction of the orientation OR.
• the size of the orientation OR is the same for all orientations OR. In other words, in magnet 90, the size of the orientation OR is constant.
• orientations OR may exist in magnet 90, but for convenience, only a predetermined number are shown in Figure 3 and other figures. Although there may be some bias in an actual magnet, the illustration shows a predetermined number of orientations OR as being evenly distributed.
• the direction of the orientation OR is expressed by the size and angle of the orientation component.
• the orientation OR has a first orientation component ORa and a second orientation component ORb.
• the first orientation component ORa is an orientation component in the radial direction RD.
• the second orientation component ORb is an orientation component in the circumferential direction CD.
• the orientation OR is decomposed into the radial direction RD and the circumferential direction CD, and is decomposed into the first orientation component ORa and the second orientation component ORb.
• the orientation OR is obtained by combining the first orientation component ORa and the second orientation component ORb.
• the orientation components ORa and ORb have sizes that correspond to the direction of the orientation OR.
• the size of the orientation OR is constant, so the orientation components ORa and ORb have a relationship such that as the second orientation component ORb increases, the first orientation component ORa decreases, and as the second orientation component ORb decreases, the first orientation component ORa increases.
• the radial direction RD corresponds to the first direction
• the circumferential direction CD corresponds to the second direction
• the first orientation component ORa is the orientation component in the first direction
• the second orientation component ORb is the orientation component in the second direction.
• the magnet 90 corresponds to the motor magnet.
• a configuration in which the magnet 90 and the stator 30 are arranged side by side in the radial direction RD corresponds to a configuration in which the motor magnet and exciter are arranged side by side in the first direction.
• the orientation OR has a third orientation component.
• the third orientation component is an orientation component in the axial direction AD.
• a magnet 90 is assumed in which the third orientation component of the orientation OR is zero.
• the orientation OR is not tilted with respect to the axial direction AD.
• the orientation OR faces one side in a direction perpendicular to the motor axis Cm.
• the axial direction AD corresponds to the third direction.
• the third orientation component is an orientation component in the third direction.
• the orientation OR may be inclined toward the axial direction AD with respect to the radial direction RD.
• the third orientation component of the orientation OR does not have to be zero.
• the magnitude of the orientation OR in a planar view is constant regardless of the magnitude of the third orientation component.
• the magnitude of the orientation OR obtained by combining the first orientation component ORa and the second orientation component ORb is constant regardless of the magnitude of the third orientation component.
• the orientation OR has an orientation angle ⁇ .
• the orientation angle ⁇ is the angle of the orientation OR.
• the orientation angle ⁇ is the angle between the radial direction RD and the orientation OR. Two angles are formed by the radial direction RD and the orientation OR, and the orientation angle ⁇ is the smaller of the two angles.
• the orientation angle ⁇ is 90° or less.
• the orientation angle ⁇ is the inclination angle of the orientation OR inclined toward the circumferential direction CD with respect to the radial direction RD.
• the orientation angle ⁇ is the inclination angle of the orientation OR inclined toward the second reference line Lr2 with respect to the first reference line Lr1.
• the first reference line Lr1 is a reference line extending in the first direction.
• the first reference line Lr1 is a virtual line that passes through the motor axis Cm and extends linearly in the radial direction RD.
• the second reference line Lr2 is a reference line that extends in the second direction.
• the second reference line Lr2 is a virtual line that extends linearly in the circumferential direction CD.
• the first reference line Lr1 and the second reference line Lr2 are perpendicular to each other.
• the first reference line Lr1 and the second reference line Lr2 are perpendicular to the motor axis Cm.
• first reference line Lr1 is a normal to the annular outer surface 71 and the annular inner surface 72 of the field annular portion 70.
• the radial direction RD is sometimes referred to as the normal direction in which a normal extends.
• the second reference line Lr2 is a tangent to the annular outer surface 71 of the field annular portion 70 or the outer surface 51a of the magnet support portion 51.
• the circumferential direction CD is sometimes referred to as the tangential direction in which a tangent extends.
• the circumferential direction CD is also sometimes referred to as the rotation direction or movement direction.
• the orientation angle ⁇ is in the range of 0° or more and 90° or less. The relationship 0° ⁇ 90° holds for the orientation angle ⁇ .
• the orientation angle ⁇ indicates the angle between the orientation OR and the first reference line Lr1, with the orientation of the orientation OR as the reference.
• the orientation angle ⁇ is the angle between the head of the arrow in the orientation OR and the first reference line Lr1.
• the orientation angle ⁇ may be the same for multiple orientations OR that are oriented in different directions.
• the orientation angle ⁇ may be the same for an orientation OR facing the upper left of the page in Figure 5 and an orientation OR facing the lower left of the page in Figure 5.
• the orientation angle ⁇ may be the same for an orientation OR facing the upper left of the page in Figure 5 and an orientation OR facing the upper right of the page in Figure 5.
• the magnitude of the orientation OR is constant in magnet 90, so the orientation angle ⁇ is determined by the magnitude relationship between the first orientation component ORa and the second orientation component ORb. Equations 1 and 2 hold true for magnet 90.
• A1 Acos ⁇ ...Formula 1
• A2 Asin ⁇ ...Formula 2
• the magnitude of the alignment OR is denoted as A
• the magnitude of the first alignment component ORa is denoted as A1
• the magnitude of the second alignment component ORb is denoted as A2.
• the magnet 90 is a magnetic member formed from a magnetic material or the like. Examples of magnetic members include sintered magnets and bonded magnets. One magnet 90 is formed from one magnetic member.
• the magnetic material is a material containing magnetic powder.
• the magnet 90 is formed containing magnetic powder. Magnetic powder is sometimes called magnetic powder or magnetic powder. In the magnet 90, the magnetic powder is in a magnetized state. In the field annular portion 70, multiple magnets 90 are fixed to each other with an adhesive or the like. Note that in this embodiment, the magnet 90 is the smallest component of the field annular portion 70, but this is not limited to this. The smallest component may be smaller or larger than the magnet 90 shown in this embodiment. For example, the smallest component may be half or twice the size of the magnet 90.
• magnet 90 the direction of the orientation OR is set by magnetization, etc. Fine magnetic powder is used as the magnetic powder in magnet 90. Because the magnetic powder is fine, magnet 90 has a high degree of freedom regarding the orientation OR. In magnet 90, the arrangement of the orientation OR is complex. In magnet 90, multiple orientations OR are distributed so that the number of second magnetic fluxes MF2 is reduced.
• the magnetic powder that forms magnet 90 includes magnetic powder made from a metallic material.
• Magnetic powder made from a metallic material includes base metal magnetic powder, rare metal magnetic powder, and rare earth magnetic powder.
• Base metal magnetic powder is magnetic powder made from a base metal.
• Rare metal magnetic powder is magnetic powder made from a rare metal.
• Rare earth magnetic powder is magnetic powder made from a rare earth.
• Magnet 90 is formed containing at least one of base metal magnetic powder, rare metal magnetic powder, and rare earth magnetic powder.
• Magnet 90 is formed in a roughly rectangular parallelepiped shape. In reality, magnet 90 has a shape that extends along an arc, as shown in Figure 2. In Figure 6 and other figures, the curved lines that extend along the arc of magnet 90 are shown expanded into straight lines. As shown in Figure 6, magnet 90 has a first opposing surface 91, a second opposing surface 92, a first end surface 93, a second end surface 94, a first side surface 95, and a second side surface 96. These surfaces 91 to 96 are included in the outer surface of magnet 90.
• the opposing surfaces 91, 92 extend in a direction perpendicular to the radial direction RD.
• the opposing surfaces 91, 92 extend in the circumferential direction CD so as to span between the first end face 93 and the second end face 94.
• the first opposing surface 91 and the second opposing surface 92 are aligned in the radial direction RD via surfaces 93-96.
• the first opposing surface 91 is located on the outer periphery
• the second opposing surface 92 is located on the inner periphery.
• the first opposing surface 91 is included in the annular outer periphery 71.
• the second opposing surface 92 is included in the annular inner periphery 72.
• the first opposing surface 91 faces the stator 30 across the radial gap 20.
• the second opposing surface 92 is on the opposite side of the stator 30 in the radial direction RD.
• the second opposing surface 92 is superimposed on the outer periphery surface 51a of the magnet support portion 51.
• the first opposing surface 91 corresponds to the first surface
• the second opposing surface 92 corresponds to the second surface.
• the end faces 93, 94 extend in a direction perpendicular to the circumferential direction CD.
• the end faces 93, 94 extend in the radial direction RD so as to span the first opposing surface 91 and the second opposing surface 92.
• the first end face 93 and the second end face 94 are aligned in the circumferential direction CD via surfaces 91, 92, 95, and 96.
• the first end face 93 of one magnet 90 and the second end face 94 of the other magnet 90 are stacked on top of each other.
• the first end face 93 corresponds to the first end
• the second end face 94 corresponds to the second end.
• the side surfaces 95, 96 extend in a direction perpendicular to the axial direction AD.
• the first side surface 95 and the second side surface 96 are aligned in the axial direction AD via the end surfaces 93, 94 and the opposing surfaces 91, 92.
• the first side surface 95 is included in the first annular surface 73.
• the second side surface 96 is included in the second annular surface 74.
• magnet 90 will be subdivided.
• magnet 90 has a vertical central portion 97, opposing parallel portions 98, and end surface parallel portions 99.
• These subdivided elements have been set up for the convenience of explanation, and in reality, some of them are not clearly separate entities. Some of these vertical central portion 97, opposing parallel portions 98, and end surface parallel portions 99 may be included in the rest. These subdivided elements have been set up to explain specific locations on magnet 90.
• the vertical central portion 97 is the central portion of the magnet 90 in the circumferential direction CD.
• the vertical central portion 97 is located midway between the first end face 93 and the second end face 94 in the circumferential direction CD.
• the vertical central portion 97 extends in the radial direction RD so as to span between the first opposing surface 91 and the second opposing surface 92.
• the vertical central portion 97 corresponds to the center.
• the vertical central portion 97 is sometimes referred to as the middle portion of the magnetic pole.
• the vertical central portion 97 does not have to be exactly in the center between the first end face 93 and the second end face 94.
• the vertical central portion 97 may be located toward the first end face 93 or the second end face 94 from this center position.
• the vertical central portion 97 may not be a line, but may have a certain width in the circumferential direction CD. This width may be, for example, one to one-third of the length of the magnet 90 in the circumferential direction CD.
• the vertical central portion 97 has a width in the circumferential direction CD in this way, the vertical central portion 97 includes the exact center position between the first end face 93 and the second end face 94.
• the orientation OR at the opposing parallel portion 98 that is closest to the first opposing surface 91 among the multiple opposing parallel portions 98 is the orientation OR on the first opposing surface 91 side.
• the orientation components ORa and ORb at this opposing parallel portion 98 are the orientation components ORa and ORb on the first opposing surface 91 side.
• the orientation OR at the opposing parallel portion 98 that is closest to the second opposing surface 92 among the multiple opposing parallel portions 98 is the orientation OR on the second opposing surface 92 side.
• the orientation components ORa and ORb at this opposing parallel portion 98 are the orientation components ORa and ORb on the second opposing surface 92 side.
• the end face parallel portions 99 are regions of the magnet 90 that extend parallel to the first end face 93 and the second end face 94. Multiple end face parallel portions 99 are arranged in the circumferential direction CD on the magnet 90.
• the multiple end face parallel portions 99 include a region extending in the radial direction RD along the first end face 93, a region extending in the radial direction RD along the second end face 94, and a region extending in the radial direction RD along the vertical central portion 97.
• multiple end face parallel portions 99 are arranged in the circumferential direction CD between the first end face 93 and the vertical central portion 97, and between the second end face 94 and the vertical central portion 97. Note that while the magnet 90 has a large number of end face parallel portions 99, for convenience, only six end face parallel portions 99 are illustrated in Figure 6, aligned with the outline arrows indicating the orientation OR.
• the orientation OR at the end face parallel portion 99 closest to the first end face 93 among the multiple end face parallel portions 99 is the orientation on the first end face 93 side.
• the orientation components ORa and ORb at this end face parallel portion 99 are the orientation components ORa and ORb on the first end face 93 side.
• the orientation OR at the end face parallel portion 99 closest to the second end face 94 among the multiple end face parallel portions 99 is the orientation on the second end face 94 side.
• the orientation components ORa and ORb at this end face parallel portion 99 are the orientation components ORa and ORb on the second end face 94 side.
• magnet 90 is shown as a schematic plan view of magnet 90, with the magnet being rectangular in plan view.
• magnet 90 is formed in a roughly fan shape in plan view.
• opposing surfaces 91 and 92 of magnet 90 are curved so as to bulge outward.
• the distance between first end face 93 and second end face 94 gradually increases toward the outer periphery.
• first side surface 95 and second side surface 96 extend parallel to each other with a constant distance between them.
• the intervening core 100 is formed in a roughly rectangular parallelepiped shape. In reality, the intervening core 100 has a shape that extends along an arc, as shown in Figure 2. In Figure 5 and other figures, the curved lines that extend along the arc of the intervening core 100 are shown expanded into straight lines. As shown in Figure 5, the intervening core 100 has a first core facing surface 101, a second core facing surface 102, a first core end surface 103, a second core end surface 104, a first core surface 105, and a second core surface 106. These surfaces 101 to 106 are included in the outer surface of the intervening core 100.
• the core facing surfaces 101, 102 extend in a direction perpendicular to the radial direction RD.
• the core facing surfaces 101, 102 extend in the circumferential direction CD so as to span between the first core end face 103 and the second core end face 104.
• the first core facing surface 101 and the second core facing surface 102 are aligned in the radial direction RD via surfaces 103-106.
• the first core facing surface 101 faces the outer periphery
• the second core facing surface 102 faces the inner periphery.
• the first core facing surface 101 is included in the annular outer periphery surface 71.
• the second core facing surface 102 is included in the annular inner periphery surface 72.
• the first core facing surface 101 faces the stator 30 via the radial gap 20.
• the second core facing surface 102 faces the opposite side of the stator 30 in the radial direction RD.
• the second core facing surface 102 is superimposed on the outer peripheral surface of the magnet support portion 51.
• the second core facing surface 102 is included in the boundary between the intermediate core 100 and the magnet support portion 51.
• the core end faces 103, 104 extend in a direction perpendicular to the circumferential direction CD.
• the core end faces 103, 104 extend in the radial direction RD along the first reference line Lr1.
• the core end faces 103, 104 are not inclined in the circumferential direction CD relative to the first reference line Lr1.
• the core end faces 103, 104 extend in the radial direction RD so as to span between the first core facing surface 101 and the second core facing surface 102.
• the first core end face 103 and the second core end face 104 are aligned in the circumferential direction CD via surfaces 101, 102, 105, and 106.
• the first core end face 103 faces one side in the circumferential direction CD
• the second core end face 104 faces the other side in the circumferential direction CD.
• the core surfaces 105, 106 extend in a direction perpendicular to the axial direction AD.
• the first core surface 105 and the second core surface 106 are aligned in the axial direction AD via the core end surfaces 103, 104 and the core facing surfaces 101, 102.
• the first core surface 105 is included in the first annular surface 73.
• the second core surface 106 is included in the second annular surface 74.
• the magnet 90 and the intervening core 100 are adjacent to each other in the circumferential direction CD.
• one of the end faces 93, 94 and one of the core end faces 103, 104 are overlapped with each other.
• the first core end face 103 is overlapped with the second end face 94 of one of the magnets 90
• the second core end face 104 is overlapped with the first end face 93 of the other magnet 90.
• Magnet 90 has a south pole and a north pole as magnetic poles. Magnet 90 has a south pole face, which is the surface that forms the south pole, and a north pole face, which is the surface that forms the north pole. In magnet 90, magnetic flux MF is generated so that it enters the interior of magnet 90 through the south pole face. In addition, magnetic flux MF is generated so that it leaves the interior of magnet 90 through the north pole face.
• the motor 10 has N magnets 90N as magnets 90.
• all of the magnets 90 are N magnets 90N.
• the N magnets 90N and the intervening cores 100 are arranged alternately one by one in the circumferential direction CD.
• an intervening core 100 is provided between two N magnets 90N adjacent to each other in the circumferential direction CD.
• magnetic flux passes through the N magnet 90N in the radial direction RD, approaching the stator 30.
• the N magnet 90N is set so that its orientation OR faces the first opposing surface 91 overall.
• the N magnet 90N is set so that its orientation OR does not face the second opposing surface 92 or the end faces 93 and 94.
• the first opposing surface 91 of the N magnet 90N is the N pole surface.
• the N magnet 90N does not have a uniform N pole strength at the first opposing surface 91.
• the second opposing surface 92, the first end surface 93, and the second end surface 94 are S-pole surfaces.
• the strength of the S-pole is not uniform on each of the second opposing surface 92, the first end surface 93, and the second end surface 94.
• On the second opposing surface 92 there is an S-pole portion at a position away from the vertical center portion 97 toward the first end surface 93, and at a position away from the vertical center portion 97 toward the second end surface 94.
• an S-pole portion is located at the corner where the second opposing surface 92 and the first end surface 93 intersect, and at the corner where the second opposing surface 92 and the second end surface 94 intersect.
• the first opposing surface 91 which is the N pole surface
• the second opposing surface 92 which is the S pole surface
• the first end surface 93, and the second end surface 94 are sometimes referred to as the second opposing surface 92S, the first end surface 93S, and the second end surface 94S.
• the orientation of the orientation OR is set so that the direction of the magnetic flux MF flowing within the N magnet 90N is changed from the circumferential direction CD to the radial direction RD.
• multiple orientations OR are distributed between the first opposing surface 91 and the second opposing surface 92, and between the first end face 93 and the second end face 94.
• the orientation of each of the multiple orientations OR is set so that the magnetic flux MF flowing in the circumferential direction CD from the S magnet 90S toward the N magnet 90N is bent toward the radial direction RD from the N magnet 90N toward the stator 30.
• multiple orientations OR face toward the first opposing surface 91 in the radial direction RD.
• at least some of the multiple orientations OR have a first orientation component ORa that is aligned with the radial direction RD.
• the first orientation component ORa faces from the second opposing surface 92 to the first opposing surface 91 in the radial direction RD.
• the N magnet 90N has multiple orientations OR with a first orientation component ORa that faces from the second opposing surface 92 to the first opposing surface 91.
• the N magnet 90N corresponds to the second motor magnet.
• the orientation of the orientation OR in the circumferential direction CD differs between the first end face 93 side and the second end face 94 side, with the vertical center portion 97 in between.
• the multiple orientations OR face toward the vertical center portion 97 as a whole.
• the multiple orientations OR face toward the vertical center portion 97 as a whole.
• the orientation OR on the first end face 93 side of the vertical center portion 97 and the orientation OR on the second end face 94 side of the vertical center portion 97 face each other as a whole in the circumferential direction CD.
• the multiple orientations OR have a second orientation component ORb along the circumferential direction CD.
• the second orientation component ORb is oriented in opposite directions between the first end face 93 and the vertical central portion 97 and between the second end face 94 and the vertical central portion 97.
• the second orientation component ORb is oriented from the first end face 93 to the vertical central portion 97 in the circumferential direction CD.
• the second orientation component ORb is oriented from the second end face 94 to the vertical central portion 97 in the circumferential direction CD.
• the intermediate core 100 functions as a pseudo-pole by being located between two adjacent magnets 90 in the circumferential direction CD.
• the intermediate core 100 functions as a pseudo-S magnet by being located between two adjacent N magnets 90N in the circumferential direction CD.
• the first core opposing surface 101 functions as a pseudo-S pole surface. Note that the intermediate core 100 that functions as a pseudo-S magnet performs the same function as the S magnet 90S in the third embodiment described below.
• the intermediate core 100 is sometimes referred to as a pseudo-pole portion.
• a first core facing surface 101 is provided between two first facing surfaces 91 adjacent in the circumferential direction CD.
• the two first facing surfaces 91 adjacent in the circumferential direction CD via the first core facing surface 101 are both N-pole surfaces, and therefore the first core facing surface 101 functions as a pseudo-S-pole surface by being located between the two N-pole surfaces.
• the interposed core 100 functions as a pseudo-pole, and is therefore included in the magnetic path through which the magnetic flux MF passes, as shown in Figure 3.
• Motor 10 is a consequen-pole motor. Consequen-pole motors are sometimes called consequen-pole motors. Consequen-pole motors are equipped with only one of an N magnet and an S magnet. In this embodiment, motor 10 is equipped with an N magnet 90N and an interposed core 100, but does not have an S magnet, thereby realizing a consequen-pole motor.
• the size of the second orientation component ORb varies among the multiple orientations OR.
• the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD.
• the second orientation component ORb is smaller on the stator 30 side in the radial direction RD than on the side farther from the stator 30.
• the second orientation component ORb gradually increases from the first opposing surface 91 side toward the second opposing surface 92 side.
• the second orientation component ORb gradually increases continuously from the first opposing surface 91 side toward the second opposing surface 92 side.
• the second orientation component ORb may also gradually increase in stages from the first opposing surface 91 side toward the second opposing surface 92 side.
• the second alignment component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side.
• the second alignment component ORb of the alignment ORmn on the second opposing surface 92 side is larger than the second alignment component ORb of the alignment OR1n on the first opposing surface 91 side.
• the second alignment component ORb gradually increases in each of the multiple end surface parallel portions 99 as it moves from the first opposing surface 91 side toward the second opposing surface 92 side.
• the second alignment component ORb of the alignment OR2n at the intermediate position is larger than the second alignment component ORb of the alignment OR1n, but smaller than the second alignment component ORb of the alignment ORmn.
• the relationship in which the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side does not necessarily have to hold for the entire N magnet 90N.
• the relationship between the multiple end face parallel portions 99 does not necessarily have to hold such that the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side.
• the second orientation component ORb of the orientation ORm1 on the second opposing surface 92 side of the third end face parallel portion 99 from the left in Figure 6 does not have to be larger than the second orientation component ORb of the orientation OR1n on the first opposing surface 91 side of the leftmost end face parallel portion 99 in Figure 6.
• the relationship in which the second orientation component ORb gradually increases from the first opposing surface 91 toward the second opposing surface 92 does not necessarily have to hold true for the entire N magnet 90N.
• the second alignment component ORb is larger on the first end face 93 side and the second end face 94 side than on the vertical center portion 97 side.
• the second alignment component ORb of alignment OR1n on the first end face 93 side is larger than the second alignment component ORb of alignment OR11 on the vertical center portion 97 side.
• the second alignment component ORb gradually increases from the vertical center portion 97 toward the first end surface 93 and the second end surface 94.
• the second alignment component ORb of alignment OR12 at the intermediate position is larger than the second alignment component ORb of alignment OR11, but smaller than the second alignment component ORb of alignment OR1n.
• the magnitude of the first orientation component ORa varies among the multiple orientations OR.
• the first orientation component ORa is larger on the first opposing surface 91 side than on the second opposing surface 92 side.
• the first orientation component ORa gradually increases from the second opposing surface 92 side toward the first opposing surface 91 side.
• the first alignment component ORa is larger on the first opposing surface 91 side than on the second opposing surface 92 side. Furthermore, in each of the multiple end surface parallel portions 99, the first alignment component ORa gradually increases from the second opposing surface 92 side toward the first opposing surface 91 side.
• the relationship in which the first orientation component ORa is larger on the first opposing surface 91 side than on the second opposing surface 92 side does not necessarily have to hold for the entire N magnet 90N. Furthermore, the relationship in which the first orientation component ORa gradually increases from the second opposing surface 92 toward the first opposing surface 91 side does not necessarily have to hold for the entire N magnet 90N.
• the first alignment component ORa is larger on the vertical center portion 97 side than on the first end face 93 side and the second end face 94 side. Furthermore, in each of the multiple opposing parallel portions 98, the first alignment component ORa gradually increases from the first end face 93 side and the second end face 94 side toward the vertical center portion 97 side.
• the orientation angle ⁇ of the N magnet 90N varies among multiple orientations OR.
• the orientation angle ⁇ is larger on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD.
• the orientation angle ⁇ is smaller on the stator 30 side in the radial direction RD than on the side farther from the stator 30.
• the orientation angle ⁇ gradually increases from the first opposing surface 91 side toward the second opposing surface 92 side.
• the orientation angle ⁇ gradually decreases from the side farther from the stator 30 toward the stator 30 side in the radial direction RD.
• the orientation angle ⁇ on the second opposing surface 92 side is larger than the orientation angle ⁇ on the first opposing surface 91 side.
• the orientation angle ⁇ mn on the second opposing surface 92 side is larger than the orientation angle ⁇ 1n on the first opposing surface 91 side (see Figure 5).
• the orientation angle ⁇ of each of the multiple end face parallel portions 99 increases the closer the portion is to the second opposing surface 92 in the radial direction RD. In other words, the orientation angle ⁇ increases the farther the portion is from the first opposing surface 91 in the radial direction RD.
• the orientation angle ⁇ 2n at the intermediate position is larger than the orientation angle ⁇ 1n on the first opposing surface 91 side, but smaller than the orientation angle ⁇ mn on the second opposing surface 92 side (see Figure 5).
• the orientation angle ⁇ is larger on the first end face 93 side and the second end face 94 side than on the vertical center portion 97 side.
• the orientation angle ⁇ gradually increases from the vertical center portion 97 side toward the first end face 93 side and the second end face 94 side.
• the orientation angle ⁇ is larger on the first end face 93 side and the second end face 94 side than on the vertical center portion 97 side.
• the orientation angle ⁇ 1n on the first end face 93 side is larger than the orientation angle ⁇ 11 on the vertical center portion 97 side (see Figure 5).
• the orientation angle ⁇ of each of the multiple opposing parallel portions 98 increases the closer it is to the first end face 93 and the second end face 94 in the circumferential direction CD. In other words, the orientation angle ⁇ increases the farther it is from the vertical center portion 97 in the radial direction RD.
• the orientation angle ⁇ 12 at the intermediate position is greater than the orientation angle ⁇ 11 on the vertical center portion 97 side, but is smaller than the orientation angle ⁇ 1n on the first end face 93 side.
• the relationship in which the orientation angle ⁇ is larger on the end faces 93, 94 side than on the vertical central portion 97 side does not necessarily have to hold for the entire N magnet 90N.
• the relationship between the multiple opposing parallel portions 98 does not necessarily have to hold such that the orientation angle ⁇ is larger on the end faces 93, 94 side than on the vertical central portion 97 side.
• the orientation angle ⁇ 1n on the first end face 93 side of the lower opposing parallel portion 98 in Figure 6 does not have to be larger than the orientation angle ⁇ m1 on the vertical central portion 97 side of the upper opposing parallel portion 98 in Figure 6 (see Figure 5).
• the relationship that the orientation angle ⁇ is larger the closer it is to the end faces 93, 94 in the circumferential direction CD does not necessarily have to hold true for the entire N magnet 90N.
• the reference state for the orientation angle ⁇ is when the orientation OR overlaps the first reference line Lr1 and faces the first opposing surface 91.
• the orientation angle ⁇ is set from 0° to 90° clockwise, with 0° as the reference, corresponding to tilting the orientation OR toward the vertical center portion 97 with respect to the first reference line Lr1.
• the orientation angle ⁇ is set from 0° to 90° counterclockwise, with 0° as the reference, corresponding to tilting the orientation OR toward the vertical center portion 97 with respect to the first reference line Lr1.
• the angle obtained by converting the length of one magnet 90 in the circumferential direction CD into an electrical angle is equal to or greater than the length equivalent to an electrical angle of 180° in the circumferential direction CD.
• the magnet angle ⁇ of magnet 90 is greater than the reference electrical angle ⁇ .
• the magnet angle ⁇ is the angle indicating the length of magnet 90 in the circumferential direction CD.
• the angle obtained by converting this length into an electrical angle is greater than the reference electrical angle ⁇ . If the distance between motor axis Cm and magnet 90 in the radial direction RD is constant, the greater the magnet angle ⁇ , the greater the length dimension of the magnet 90 in the circumferential direction CD.
• the reference electrical angle ⁇ is the mechanical angle equivalent to an electrical angle of 180°.
• the magnet angle ⁇ is the same in every region in the radial direction RD.
• the magnet angle ⁇ is a value that indicates the distance between the first end face 93 and the second end face 94 in degrees.
• the end faces 93, 94 are not inclined toward the circumferential direction CD with respect to the first reference line Lr1, which is why the magnet angle ⁇ is constant in every region in the radial direction RD.
• the magnet angle ⁇ at the first opposing surface 91 and the magnet angle ⁇ at the second opposing surface 92 are the same value.
• the core angle ⁇ (see Figure 28) is the same at any position in the radial direction RD.
• the core angle ⁇ is an angle that indicates the length of the intervening core 100 in the circumferential direction CD. If the distance between the motor axis Cm and the intervening core 100 in the radial direction RD is constant, the larger the core angle ⁇ , the greater the length dimension of the intervening core 100 in the circumferential direction CD.
• the core angle ⁇ is a value that indicates the distance between the first core end face 103 and the second core end face 104 in degrees.
• the core end faces 103, 104 are not inclined toward the circumferential direction CD with respect to the first reference line Lr1, so the core angle ⁇ is constant in any region in the radial direction RD.
• the core angle ⁇ at the first core facing surface 101 and the core angle ⁇ at the second core facing surface 102 are the same value.
• Equation 3 holds.
• the number of magnetic pole pairs is M.
• FIG. 1 illustrates an example in which the number of magnetic pole pairs is 5.
• Equation 3 holds when M is 5.
• the manufacturing process for manufacturing the motor 10 includes a process for manufacturing the rotor 40.
• workers prepare the housing 11, shaft 12, stator 30, rotor core 50, magnets 90, etc.
• the workers then attach the magnets 90 to the rotor core 50.
• the workers fit two magnets 90 between two adjacent intervening cores 100 from the outer periphery, and fix the magnets 90 to the magnet support portion 51 or intervening core 100 with adhesive or the like.
• the magnets 90 may be magnetized before or after the magnets 90 are attached to the rotor core 50.
• An operator can measure the orientation of a motor magnet by using a measuring device, for example. For example, an operator removes at least a portion of the motor magnet from the motor as the measurement object and measures the orientation of that measurement object. The orientation measured by the measuring device is displayed on the display screen of the measuring device, with only multiple positions on the motor magnet sampled.
• the actual measured ORc orientations are displayed on a display screen or the like for multiple positions on the north magnet 90N.
• the actual ORc orientations are displayed as shapes such as triangles.
• the measurement results shown in Figure 8 show that the multiple actual ORc orientations distributed on the north magnet 90N are oriented in the same direction as the multiple ORc orientations shown in Figure 6, etc.
• the locations where the actual ORc orientations are shown are the measurement locations where the orientations of the actual ORc orientations were measured.
• operators may perform orientation analysis using electron backscatter diffraction (EBSD). Electron backscatter diffraction is sometimes referred to as EBSD.
• Electron backscatter diffraction is a method for measuring the crystal orientation of a motor magnet. Electron backscatter diffraction makes it possible to quantitatively evaluate the extent to which the easy axis of magnetization, which is the orientation of a magnet, is oriented in a given direction.
• the worker may also perform orientation analysis on the motor magnet.
• orientation analysis tasks and processes are performed to analyze the orientation of the motor magnet.
• the worker may detect the magnetic flux generated by the motor magnet using a detection device or the like, and then use the detected magnetic flux to estimate or calculate the orientation of the motor magnet.
• the worker may also use the results of the orientation analysis to identify the magnetic path through magnetic circuit analysis.
• the orientation faces one side of the radial direction RD due to parallel orientation.
• the orientation OR has the same direction.
• the magnitude of the second orientation component ORb is the same for all orientations OR.
• the orientation angle ⁇ is the same for all orientations OR.
• a gradually changing orientation is used for the magnet 90, thereby increasing the effective magnetic flux without increasing the magnet thickness or back core.
• the orientation OR gradually changes from one side to the other in each of the two directions, the radial direction RD and the circumferential direction CD.
• the orientation angle ⁇ increases from the vertical center portion 97 toward the end faces 93, 94, so that the orientation OR shifts from the radial direction RD toward the circumferential direction CD.
• the orientation angle ⁇ increases from the armature side toward the anti-armature side, so that the orientation OR shifts from the radial direction RD toward the circumferential direction CD.
• the armature side is the stator 30 side and radial gap 20 side of the field annular portion 70.
• the anti-armature side is the opposite side of the field annular portion 70 from the armature.
• motor 10 can achieve high torque generation efficiency relative to the amount of material used. In other words, motor 10 can suppress magnetic saturation even with a thin back core, so it is expected to achieve the desired motor torque while minimizing the amount of magnet and core used.
• the torque generation efficiency relative to the amount of material used includes the torque generation efficiency relative to the amount of magnets used and the torque generation efficiency relative to the amount of cores used.
• the amount of magnets used is, for example, the amount of magnetic powder forming the field annular portion 70 and magnets 90.
• the amount of cores used is the amount of soft magnetic material forming the back core of the magnet support portion 51.
• the amount of material used includes the volume and weight of the material.
• the amount of magnets used is the volume and weight of the magnetic powder.
• the amount of cores used is the volume and weight of the soft magnetic material.
• the formation of a magnetic path on the second opposing surface 92 side of the magnet 90 is suppressed.
• an increase in magnetic flux MF on the second opposing surface 92 side of the magnet 90 is suppressed.
• a decrease in the magnetic flux MF passing from the magnet 90 through the intervening core 100 is suppressed.
• a decrease in the function of the intervening core 100 as a pseudo-pole is suppressed.
• the second orientation component ORb is larger in the circumferential direction CD on the first end face 93 side and the second end face 94 side than on the vertical center portion 97 side.
• the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to bend toward the circumferential direction CD the closer it is to the first end face 93 or the second end face 94 in the circumferential direction CD.
• the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD.
• the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is bent toward the circumferential direction CD, making it easier for it to pass through the first end surface 93 and the second end surface 94 in the circumferential direction CD. Therefore, it is possible to prevent the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD from leaking from the second opposing surface 92 to the outside of the magnet 90.
• the first orientation component ORa is smaller on the first end face 93 side and the second end face 94 side than on the vertical center portion 97 side in the circumferential direction CD.
• the first orientation component ORa is smaller on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD. With this configuration, it is possible to reduce the magnetic flux MF passing through the second opposing surface 92 in the radial direction RD toward the side opposite the stator 30.
• an intervening core 100 is provided between two adjacent magnets 90 in the circumferential direction CD.
• the second orientation component ORb is larger on the intervening core 100 side than on the vertical center portion 97 side in the circumferential direction CD.
• the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to bend toward the circumferential direction CD the closer it is to the intervening core 100 in the circumferential direction CD. Therefore, even in a consequencial pole type motor 10 having only one of the north magnets and south magnets, a configuration can be realized in which the magnetic flux MF passing through the intervening core 100, which functions as a pseudo pole, is more likely to concentrate. This makes it possible to obtain the desired motor torque while minimizing the amount of magnetic material used.
• the magnet 90 is provided on the rotor 40 as a field element.
• the magnetic flux MF is less likely to leak from the second opposing surface 92 of the magnet 90, which prevents the magnetic flux MF from leaking to the outside from the rotor 40 in the radial direction RD.
• the second orientation component ORb gradually increases in the radial direction RD from the first opposing surface 91 toward the second opposing surface 92.
• the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD tends to bend toward the circumferential direction CD gradually increasing from the first opposing surface 91 toward the second opposing surface 92.
• the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to bend toward the circumferential direction CD, making it easier for it to pass through the first end surface 93 and the second end surface 94.
• the first orientation component ORa gradually decreases in the circumferential direction CD from the vertical center portion 97 toward the first end face 93 and the second end face 94.
• the flow of magnetic flux MF in the radial direction RD gradually increases from the first end face 93 or the second end face 94 toward the vertical center portion 97.
• the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to concentrate toward the vertical center portion 97.
• the first orientation component ORa gradually decreases in the radial direction RD from the first opposing surface 91 toward the second opposing surface 92. This configuration reduces the magnetic flux MF passing through the second opposing surface 92 in the radial direction RD toward the side opposite the stator 30.
• the angle obtained by converting the length of one magnet 90 in the circumferential direction CD into an electrical angle is equal to or greater than an electrical angle of 180° in the circumferential direction CD.
• This configuration prevents the angle indicating the size of the magnet 90 in the circumferential direction CD from being insufficient relative to the electrical angle of 180°. Therefore, the effective magnetic flux can be increased without increasing the thickness of the magnet 90 in the radial direction RD.
• the magnet 90 is provided on the rotor 40. With this configuration, as described above, the magnetic flux MF is less likely to leak from the second opposing surface 92 of the magnet 90, allowing the magnet support portion 51, which is the magnetic path inside the magnet 90, to be made thinner in the radial direction RD.
• the N magnet 90N has a first orientation component ORa that extends from the second opposing surface 92 toward the first opposing surface 91 in the radial direction RD. Therefore, as shown in FIG. 3, in the N magnet 90N, the magnetic flux MF that extends in the circumferential direction CD from the intermediate core 100 toward the end faces 93, 94 is more likely to bend toward the radial direction RD so as to extend toward the first opposing surface 91 the closer it is to the first opposing surface 91 on the end faces 93, 94. Also, in the N magnet 90N, the magnetic flux MF that has passed through the first end face 93 or the second end face 94 in the circumferential direction CD is more likely to bend toward the radial direction RD the closer it is to the vertical center portion 97.
• the second opposing surface 92 of the magnet 90 faces the magnet support portion 51, and the magnet 90 is mounted on the magnet support portion 51.
• magnetic saturation of the magnet support portion 51 due to the magnetic flux MF emitted from the second opposing surface 92 of the magnet 90 is suppressed.
• an increase in the thickness of the magnet support portion 51 in the radial direction RD is suppressed.
• an increase in the size of the magnet 90 in the radial direction RD is suppressed.
• the first magnetic flux MF1 flows from the inside of the S magnet 90S to the inside of the N magnet 90N in a magnetic path that passes only through the S magnet 90S, the N magnet 90N, and any intervening objects between the N magnet 90N and the S magnet 90S, without passing through any parts other than the field ring-shaped portion 70, such as the magnet support portion 51.
• the first magnetic flux MF1 passes through a magnetic path that is completed only within the field ring-shaped portion 70 (a completed magnetic path).
• the second magnetic flux MF2 forms a back-core magnetic path that includes a magnetic pole, a pseudo-pole, and the magnet support portion 51 (back core).
• the back-core magnetic path is a magnetic path through which the second magnetic flux MF2 passes, and is formed by including the magnet 90, the intervening core 100, and the magnet support portion 51.
• the second magnetic flux MF2 passes through the back-core magnetic path, extending beyond the completed magnetic path into the magnet support portion 51.
• the magnetic paths through which the magnetic flux MF passes are a mixture of complete magnetic paths and back-core magnetic paths.
• the amount of second magnetic flux MF2 passing through the magnet support portion 51 is reduced, making it less likely that magnetic saturation will occur in the magnet support portion 51. Therefore, in the rotor 40, even if the magnet support portion 51 is made thinner in the radial direction RD, magnetic saturation in the magnet support portion 51 can be suppressed. In the magnet support portion 51, magnetic saturation occurs when the amount of magnetic flux MF passing through the magnet support portion 51 reaches the upper limit value of the magnet support portion 51.
• the second orientation component ORb is larger on the end faces 93, 94 side than on the vertical center portion 97 side.
• the magnet 90 has a plurality of magnet pieces 60.
• one magnet 90 has two magnet pieces 60.
• the two magnet pieces 60 are arranged in the circumferential direction CD.
• a plurality of magnet pieces 60 are arranged in the circumferential direction CD, thereby realizing a configuration in which a plurality of magnets 90 are arranged in the circumferential direction CD.
• the magnet pieces 60 are magnet members formed from a magnetic material or the like.
• One magnet piece 60 is formed from one magnet member.
• the N magnet 90N has a first magnet piece 60N1 and a second magnet piece 60N2.
• the first magnet piece 60N1 and the second magnet piece 60N2 are magnet pieces 60.
• the first magnet piece 60N1 and the second magnet piece 60N2 are arranged adjacent to each other in the circumferential direction CD.
• the boundary between the first magnet piece 60N1 and the second magnet piece 60N2 extends in the radial direction RD so as to span the first opposing surface 91 and the second opposing surface 92 of the N magnet 90N.
• the boundary between the first magnet piece 60N1 and the second magnet piece 60N2 coincides with the vertical center portion 97 of the N magnet 90N.
• the orientation angle ⁇ is equal between the first opposing surface 91 and the second opposing surface 92 near the magnetic pole center of the field annular portion 70.
• the orientation angle ⁇ is, for example, 0° near the magnetic pole center.
• the end surface parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region.
• the end surface parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region.
• the orientation OR may be perpendicular to the radial direction RD in at least a portion of the magnet 90 .
• the orientation OR is perpendicular to the radial direction RD.
• some of the multiple orientations OR are perpendicular to the radial direction RD.
• the orientations OR that are perpendicular to the radial direction RD have a second orientation component ORb, but do not have a first orientation component ORa.
• the orientation angle ⁇ of the orientation OR that is perpendicular to the radial direction RD is 90°.
• the direction of the orientation OR that is perpendicular to the radial direction RD is parallel to the second reference line Lr2.
• the orientation OR is perpendicular to the radial direction RD in at least a portion of the first end face 93 side and at least a portion of the second end face 94 side.
• the orientation OR is perpendicular to the radial direction RD over the entire end face parallel portion 99 closest to the end faces 93 and 94.
• the orientation OR is not inclined with respect to the radial direction RD in at least a portion of the magnet 90.
• the orientation OR is not inclined with respect to the radial direction RD in the entire end face parallel portion 99 closest to the vertical center portion 97.
• the orientation angle ⁇ is equal between the first opposing surface 91 and the second opposing surface 92 near the magnetic pole end of the field annular portion 70.
• the orientation angle ⁇ is, for example, 90° near the magnetic pole end.
• the ratio of areas containing only one of the first and second orientation components to areas containing both the first and second orientation components can be changed. This makes it easier to create a design that optimizes the torque generation rate relative to the amount of magnet used. Design guidelines include reducing the amount of magnet used. Furthermore, depending on the combination of the motor's number of poles and slots, it is possible to expect further improvements in torque generation efficiency relative to the amount of magnet used.
• one magnet 90 is formed by a plurality of magnet members.
• the magnet 90 includes three or more magnet pieces 60.
• the multiple magnet pieces 60 are arranged in the circumferential direction CD and radial direction RD in the field annular portion 70 and magnet 90.
• a first joint 81 and a second joint 82 are formed in the field annular portion 70 and magnet 90.
• the joints 81 and 82 include the joining surfaces of the magnet pieces 60. Two adjacent magnet pieces 60 are joined at the joints 81 and 82 with an adhesive or the like.
• the joints 81 and 82 include the boundary between the magnet pieces 60.
• the first joint 81 includes the boundary between two magnet pieces 60 adjacent in the circumferential direction CD.
• the first joint 81 extends in the radial direction RD.
• the second joint 82 includes the boundary between two magnet pieces 60 adjacent in the radial direction RD.
• the second joint 82 extends in the circumferential direction CD.
• the magnet pieces 60 are anisotropic magnets.
• the orientation OR is the same for each magnet piece 60.
• the entire magnet piece 60 is a region of parallel orientation.
• Magnet pieces 60 are sometimes referred to as parallel orientation magnets.
• magnet 90 multiple magnet pieces 60 are arranged side by side, so the orientation OR changes gradually in the radial direction RD and the circumferential direction CD.
• the orientation OR of two adjacent magnet pieces 60 in the radial direction RD and the circumferential direction CD is different from each other.
• a gradually varying orientation region is formed by combining magnet pieces 60, which are relatively easy to manufacture, such as parallel-oriented magnets.
• magnet pieces 60 which are relatively easy to manufacture, such as parallel-oriented magnets.
• a gradually varying orientation magnet is easily produced in a configuration in which multiple parallel-oriented magnets are used to form a gradually varying orientation magnet. This allows for simplification of the manufacturing equipment required to produce gradually varying orientation magnets, such as magnet 90.
• a collection of parallel-oriented magnets allows for a simple approximation of gradually varying orientation to be achieved.
• multiple magnet pieces 60 are arranged so that they are linearly symmetrical with respect to the vertical center portion 97 between the portion on the first end face 93 side and the portion on the second end face 94 side.
• the magnet 90 includes multiple magnet pieces 60 that differ in shape and size from one another. For example, two magnet pieces 60 adjacent in the circumferential direction CD or the radial direction RD have different shapes and sizes from one another.
• multiple second joints 82 extending in the circumferential direction CD are arranged in the radial direction RD.
• the multiple magnet pieces 60 are arranged so that the multiple second joints 82 arranged in the radial direction RD are not parallel to each other.
• One of the multiple second joints 82 arranged in the radial direction RD is inclined toward the radial direction RD relative to the others. As a result, the multiple second joints 82 are not concentric.
• multiple first joints 81 extending in the radial direction RD are arranged in the circumferential direction CD.
• the multiple magnet pieces 60 are arranged so that the multiple first joints 81 arranged in the circumferential direction CD are not arranged radially.
• One of the multiple first joints 81 arranged in the circumferential direction CD is inclined toward the circumferential direction CD relative to the others. As a result, the multiple first joints 81 are not arranged radially.
• the multiple magnet pieces 60 are arranged so that the multiple second joints 82 are not arranged concentrically, and the multiple first joints 81 are not arranged radially. Therefore, in a configuration in which an approximate gradually changing orientation is formed using multiple magnet pieces 60 that are parallel magnets, the magnetic flux MF generated by the multiple magnet pieces 60 tends to connect smoothly. This makes it easier to ensure appropriate torque generation efficiency for the magnet pieces 60. Furthermore, the smooth connection of the magnetic flux MF can also be expected to have the effect of suppressing torque ripple.
• the size and shape of the magnet pieces 60 may be the same for multiple magnet pieces 60.
• the multiple magnet pieces 60 may be arranged so that the multiple second joints 82 are arranged concentrically.
• the multiple magnet pieces 60 may be arranged so that the multiple first joints 81 are arranged radially.
• the outer peripheral edge of the field annular portion 70 is formed in a circular shape in a plan view. In contrast to this, in the eighth embodiment, at least a part of the outer peripheral edge of the field annular portion 70 extends linearly.
• the outer peripheral edge portion of the magnet 90 includes multiple straight line portions that extend linearly.
• the outer peripheral edge portion of the magnet 90 is the outer portion of the outer peripheral edge of the first side surface 95 in the radial direction RD.
• the outer peripheral edge portion of the magnet 90 is the portion of the outer peripheral edge of the magnet 90 that extends along the first opposing surface 91.
• the outer peripheral edge portion of the magnet 90 includes two straight line portions.
• An outer peripheral corner portion is formed on the outer peripheral edge portion of the magnet 90.
• the outer peripheral corner portion is a corner formed by two straight line portions adjacent in the circumferential direction CD at the outer peripheral edge portion of the magnet 90.
• the outer peripheral corner portion is provided relative to the vertical center portion 97.
• the outer peripheral corner portion is provided at the boundary between two magnet pieces 60 adjacent in the circumferential direction CD.
• the outer corners protrude outward in the radial direction RD from the outer edge of the magnet 90.
• first opposing surface 91 the straight line portion included in the outer peripheral edge portion is formed by first opposing surface 91.
• at least a portion of first opposing surface 91 is a flat surface.
• first opposing surface 91 multiple flat surfaces are arranged in the circumferential direction CD, thereby forming multiple straight line portions in the outer peripheral edge portion of magnet 90.
• the flat surface formed in first opposing surface 91 extends flatly in a direction perpendicular to the radial direction RD.
• the outer peripheral edge of the field ring portion 70 is shaped and sized so that the outer peripheral corners of the magnets 90 are inscribed within the outer peripheral edge of the field ring portion 70 in the first embodiment. Therefore, in this embodiment, the linear portion at the outer peripheral edge of the magnets 90 is located partially inside the outer peripheral edge of the field ring portion 70 in the first embodiment, thereby reducing the volume of the field ring portion 70 and magnets 90 compared to the first embodiment. In the field ring portion 70 and magnets 90 of this embodiment, the area between the linear portion at the outer peripheral edge of the magnets 90 and the outer peripheral end of the field ring portion 70 in the first embodiment is shaved away to a small area.
• the orientation OR and the shape of the outer peripheral edge in a plan view of the field ring portion 70 are set to reduce ripples in the motor torque.
• the core end faces 103, 104 are inclined toward the circumferential direction CD with respect to the first reference line Lr1 so as to face inward in the radial direction RD.
• the core angle ⁇ gradually increases from the second core facing surface 102 to the first core facing surface 101. That is, the core angle ⁇ gradually increases from the side opposite the armature to the side facing the armature.
• the rate of change of the core angle ⁇ from the second core facing surface 102 to the first core facing surface 101 is constant.
• the core end faces 103, 104 extend straight and flat across the first opposing surface 91 and the second opposing surface 92, inclined toward the circumferential direction CD with respect to the first reference line Lr1.
• the core end faces 103 and 104 are flat surfaces that extend flatly, whereas in the fourteenth embodiment, the core end faces 103 and 104 are curved in the circumferential direction CD.
• the change in length in the circumferential direction CD of the side of the intervening core 100 facing the magnet 90, which increases in the radial direction RD from the second opposing surface 92 side toward the first opposing surface 91 side, is reduced.
• the inflow area into which the magnetic flux MF flows and the outflow area from which it flows between the magnet 90 and the pseudo pole increase, thereby increasing the effective magnetic flux of the first magnetic flux MF1, etc.
• the radially outer corners of the magnet 90 and the intervening core 100 are less likely to become narrow. Therefore, deformation of the radially outer corners of the magnet 90 and the intervening core 100 can be suppressed.
• the magnet 90 is attached to the rotor core 50.
• a worker inserts the magnet 90 from one side in the axial direction AD between two intervening cores 100 that are adjacent in the circumferential direction CD.
• the worker then fixes the magnet 90 to the rotor core 50 and the intervening cores 100 using an adhesive or the like.
• the magnet 90 is inserted between the two intervening cores 100 from one side in the axial direction AD, which allows for greater freedom in the shape of the magnet 90 and the shape of the intervening core 100.
• the intervening core 100 hooks onto the magnet 90 from the radially outer side, it is possible to insert the magnet 90 between the two intervening cores 100 from one side in the axial direction AD.
• the motor 10 is a radial gap inner rotor type motor, whereas in the nineteenth embodiment, the motor 10 is a radial gap outer rotor type motor.
• the rotor 40 is provided on the outer periphery of the stator 30.
• a motor 10 in which the rotor 40 is provided on the outer periphery of the stator 30 is sometimes referred to as an outer rotor type motor.
• a rotor 40 provided on the outer periphery of the stator 30 is sometimes referred to as an outer rotor.
• a field element such as the rotor 40 is provided on the outer periphery of an exciter such as the stator 30.
• the housing 11 and shaft 12 are not shown in Figure 34.
• the field annular portion 70, magnets 90, and intervening cores 100 are provided on the inner periphery of the rotor core 50.
• the field annular portion 70, magnets 90, and intervening cores 100 are provided on the outer periphery of the stator 30.
• a first surface such as the first opposing surface 91 faces the inner periphery
• a second surface such as the second opposing surface 92 faces the outer periphery.
• the stator 30 is an exciter and the rotor 40 is a field element.
• the rotor 40 is an exciter and the stator 30 is a field element.
• the stator 30 has a rotor core 50, magnet pieces 60, a field annular portion 70, magnets 90, and an intervening core 100.
• the rotor 40 has a stator core 31 and coils 35. The rotor 40 is excited by passing current through the coils 35.
• the rotor 40 which is an exciter, is provided on the inner periphery of the stator 30, which is a field element.
• the motor 10 is an inner rotor type motor.
• the motor 10 is a brushed motor.
• the rotor core 50, magnets 90, and intervening core 100 are fixed to the housing 11.
• the magnet 90 is provided on the stator 30 as a field element. With this configuration, as described above, the magnetic flux MF is less likely to leak from the second opposing surface 92 of the magnet 90, which prevents the magnetic flux MF from leaking to the outside from the rotor 40 in the radial direction RD.
• the motor 110 shown in Figure 36 is an axial gap motor.
• Axial gap motors are sometimes called axial motors.
• the motor 110 is sometimes called a rotary motor.
• the stator 130 and rotor 140 are aligned in the axial direction AD along the shaft 112.
• the motor 110 has an axial gap 120.
• the axial gap 120 is a gap between the stator 130 and the rotor 140.
• the axial gap 120 extends in a direction perpendicular to the axial direction AD.
• the stator 130 and rotor 140 are aligned in the axial direction AD via the axial gap 120.
• the motor 110, shaft 112, stator 130, and rotor 140 are configured to correspond to the motor 10, shaft 12, stator 30, and rotor 40 of the first embodiment.
• the major difference between the motor 110 of this embodiment and the motor 10 of the first embodiment is that the stator 130 and rotor 140 are aligned in the axial direction AD.
• the stator 130 corresponds to the exciter
• the rotor 140 corresponds to the field element.
• the shaft 112 corresponds to the rotation axis.
• the circumferential direction CD is the direction around the rotation axis.
• the first annular surface 73 of the magnet 90 faces the stator 130 across the axial gap 120.
• the second annular surface 74 faces the opposite side from the stator 130.
• the first opposing surface 91 of the magnet 90 faces the stator 130 across the axial gap 120.
• the first opposing surface 91 is included in the first annular surface 73.
• the second opposing surface 92 faces the opposite side from the stator 130 in the axial direction AD.
• first opposing surface 91 and second opposing surface 92 are aligned in the axial direction AD.
• First end surface 93 and second end surface 94 are aligned in the circumferential direction CD.
• at least a portion of the orientation OR is inclined toward the circumferential direction CD with respect to the axial direction AD.
• the axial direction AD corresponds to the first direction
• the circumferential direction CD corresponds to the second direction.
• the orientation of the orientation OR relative to the first and second directions is the same as in the first embodiment.
• the first core facing surface 101 and the second core facing surface 102 are aligned in the axial direction AD.
• the first core end face 103 and the second core end face 104 are aligned in the circumferential direction CD.
• the overall orientation OR faces in the circumferential direction CD.
• the orientation OR is not inclined toward the radial direction RD with respect to the circumferential direction CD.
• all orientations OR extend in a direction perpendicular to a single third reference line Lr3 that passes through that magnet piece 60.
• the radial direction RD corresponds to the third direction.
• the third reference line Lr3 is a reference line that extends in the third direction.
• the third reference line Lr3 is an imaginary line that passes through the motor axis Cm and extends linearly in the radial direction RD.
• the magnet 90 is provided in an axial motor.
• the first opposing surface 91 and the second opposing surface 92 are aligned in the axial direction AD along the shaft 112.
• the first end surface 93 and the second end surface 94 are aligned in the circumferential direction CD.
• an axial motor may have multiple stators 130 and rotors 140.
• two rotors 140 may be arranged side by side in the axial direction AD with the stator 130 interposed therebetween.
• This motor 110 is sometimes referred to as a double-rotor motor.
• an axial motor may have two stators 130 arranged side by side in the axial direction AD with the rotor 140 interposed therebetween.
• This motor 110 is sometimes referred to as a double-stator motor.
• the motor 10 is a rotary motor, whereas in the twenty-second embodiment, the motor is a linear motor.
• a plurality of magnets 90 and intervening cores 100 are arranged in a straight line along the axial direction AD.
• the magnet support portion 51 and field assembly extend along the axial direction AD.
• the field assembly is a region in the mover 240 that corresponds to the field annular portion 70 of the first embodiment.
• the field assembly is formed including a plurality of magnets 90 and a plurality of intervening cores 100.
• the plurality of magnets 90 and the plurality of intervening cores 100 are integrated.
• the plurality of magnets 90 and the plurality of intervening cores 100 are connected by the magnet support portion 51, etc.
• the motor 210, shaft 212, stator 230, and mover 240 are configured to correspond to the motor 10, shaft 12, stator 30, and rotor 40 of the first embodiment.
• the major difference between the motor 210 of this embodiment and the motor 10 of the first embodiment is that the mover 240 moves in the axial direction AD relative to the stator 230.
• the stator 230 corresponds to the exciter
• the mover 240 corresponds to the field element.
• the shaft 212 corresponds to the linear motion axis.
• the axial direction AD is the direction along the linear motion axis.
• stator 230 in the stator 230, multiple core teeth 32 and coils 35 are arranged in the axial direction AD.
• multiple magnets 90 and interposed cores 100 are arranged in the axial direction AD.
• the first opposing surface 91 faces the stator 230 across the linear gap 220.
• the second opposing surface 92 faces the opposite side from the stator 230 in the radial direction RD.
• first opposing surface 91 and second opposing surface 92 are aligned in the radial direction RD.
• First end surface 93 and second end surface 94 are aligned in the axial direction AD.
• at least a portion of the orientation OR is inclined toward the axial direction AD with respect to the radial direction RD.
• the radial direction RD corresponds to the first direction
• the axial direction AD corresponds to the second direction.
• the orientation of the orientation OR relative to the first and second directions is the same as in the first embodiment.
• the first core facing surface 101 and the second core facing surface 102 are aligned in the radial direction RD.
• the first core end face 103 and the second core end face 104 are aligned in the axial direction AD.
• the magnet 90 is provided in a linear motor.
• the first opposing surface 91 and the second opposing surface 92 are aligned in the radial direction RD. Furthermore, the first end surface 93 and the second end surface 94 are aligned in the axial direction AD. With this configuration, an increase in magnetic flux MF on the second opposing surface 92 side of the magnet 90 in the linear motor can be suppressed.
• the disclosure of this specification is not limited to the exemplified embodiments.
• the disclosure encompasses the exemplified embodiments and modifications thereto by those skilled in the art.
• the disclosure is not limited to the combinations of parts and elements shown in the embodiments, and can be implemented in various modifications.
• the disclosure can be implemented in various combinations.
• the disclosure can have additional parts that can be added to the embodiments.
• the disclosure encompasses the omission of parts and elements from the embodiments.
• the disclosure encompasses the substitution or combination of parts and elements between one embodiment and another embodiment.
• the disclosed technical scope is not limited to the description of the embodiments.
• the disclosed technical scope is defined by the claims, and should be interpreted as including all modifications within the meaning and scope equivalent to the claims.
• the magnet 90 serving as the motor magnet may have any shape.
• the first opposing surface 91 and the second opposing surface 92 do not have to extend in a direction perpendicular to the radial direction RD.
• the first opposing surface 91 and the second opposing surface 92 may be inclined with respect to the radial direction RD so as to face one side in the circumferential direction CD or one side in the axial direction AD.
• the first end surface 93 and the second end surface 94 do not have to extend in a direction perpendicular to the circumferential direction CD.
• the rotor core 50 does not have to form a back core for the magnet 90.
• the back core may be provided for the magnet 90 as a separate member from the rotor core 50.
• the rotor core 50 does not have to be made of a soft magnetic material.
• a back core does not have to be provided for the magnet 90.
• motor magnets such as magnet 90 may be provided in the stator, rotor, or mover, regardless of the type of motor, as long as they are included in the motor's field magnet.
• the intervening core 100 may be formed from at least one core member.
• the intervening core 100 may be formed to include multiple core members.
• first core end face 103 and the second core end face 104 may be inclined with respect to the circumferential direction CD so as to face one side in the radial direction RD or one side in the axial direction AD. Furthermore, the first core face 105 and the second core face 106 do not have to extend in a direction perpendicular to the axial direction AD.
• the first direction and the second direction do not have to be orthogonal as long as they intersect with each other.
• the radial direction RD which is the first direction
• the circumferential direction CD which is the second direction
• the radial direction RD or Y direction which is the first direction
• the axial direction AD or X direction which is the second direction
• the magnetic powder and other materials contained in motor magnets such as magnet 90 can be appropriately selected as long as they satisfy the performance of the motor magnet.
• the motor magnet will have characteristics that arise from the combination of the magnetic powder and other materials selected. A motor magnet with such characteristics is used in a motor. Note that materials other than the magnetic powder do not necessarily need to be included in the motor magnet.
• the magnetic powder can be rare earth magnetic powder, which contains rare earths as a component, or rare earth-free magnetic powder, which does not contain rare earths as a component.
• the magnetic powder may contain at least one type of rare earth magnetic powder.
• the magnetic powder may contain at least one type of rare earth-free magnetic powder.
• the magnetic powder may contain at least one type of rare earth magnetic powder and at least one type of rare earth-free magnetic powder.
• Motor magnets containing magnetic powder with the above-mentioned properties are expected to generally possess the properties of such magnetic powder.
• motor magnets containing such magnetic powder are expected to possess properties such as small size and light weight, ease of modification, easy material procurement, high recycling efficiency, high heat resistance, and radiation resistance.
• Such motor magnets can be widely adopted in motors in general.
• such motor magnets can also be adopted in motors in certain small-scale technical fields where these properties are required.
• the motor magnets used in motors are required to produce an output appropriate for their application.
• the magnetic powder contained in the motor magnet can be any magnetic powder expected to produce an output appropriate for the application.
• Magnets include ceramic magnets such as ferrite magnets, metal magnets such as rare earth magnets and ordered alloy magnets, and bonded magnets such as rubber magnets and plastic magnets.
• Ferrites include hexagonal ferrites such as barium ferrite and strontium ferrite, and spinel ferrites such as cobalt ferrite.
• Rare earths include R-T systems such as Sm-Co, R-T-B systems such as Nd-Fe-B, and R-T-N systems such as Sm-Fe-N.
• Ordered alloys include L10-FePt, L10-FeNi, and ⁇ -MnAl.
• Other metallic materials for metal magnets include spinodal decomposition systems such as alnico and Fe-Cr-Co, and Fe16N2. Note that the R above stands for Rare earth, and includes Nd, Sm, Dy, etc. T stands for Transition metal, and includes Fe, Co, Ni, etc.
• motor magnets can be used for consumer, commercial, industrial, medical, and other purposes.
• motors can be used in mobility products that move people and objects, robotic products involved in the production and control of objects, and equipment that generates energy such as electricity.
• motor magnets can be widely and generally applied to any equipment that includes a motor.
• Mobility products include cars for land transportation, aircraft for air transportation, ships for water transportation, submarines and submersibles for underwater transportation, and spacecraft for space travel.
• Vehicles include manned and unmanned automobiles. Specifically for transporting goods, vehicles include manned and unmanned guided vehicles. Unmanned guided vehicles are sometimes called AGVs. AGV is an abbreviation for Automated Guided Vehicle. Aircraft include manned and unmanned aircraft. Unmanned aircraft are sometimes called UAVs. UAV is an abbreviation for Unmanned Aerial Vehicle. Specifically for transporting goods, ships include manned and unmanned ships. Submarines and submarines include manned and unmanned submersibles. Spacecraft include manned and unmanned spacecraft. Manned spacecraft are sometimes called spaceships.
• Robot products include industrial robots, home robots, service robots, medical robots, educational robots, agricultural robots, exploration robots, and leisure robots.
• a motor component (40; 140; 240) comprising: a plurality of motor magnets (90) aligned in a second direction (CD; CD; AD) intersecting a first direction (RD; AD; RD); and an interposition portion (100) including a soft magnetic material and provided between two of the motor magnets aligned adjacent to each other in the second direction,
• the motor magnet is a first surface (91) and a second surface (92) aligned in the first direction; a first end (93) and a second end (94) aligned in the second direction; a plurality of orientations (OR) distributed between the first surface and the second surface and between the first end and the second end; At least some of the plurality of orientations have a first orientation component (ORa) along the first direction and a second orientation component (ORb) along the second direction, the first orientation component is oriented from one of the first surface and the second surface to the other in the first direction, is smaller on the second surface side than on the first surface side in the first direction, and is smaller
• motor magnet is a first motor magnet (90S) having a plurality of orientations with the first orientation component directed from the first surface to the second surface in the first direction, or a second motor magnet (90N) having a plurality of orientations with the first orientation component directed from the second surface to the first surface in the first direction.
• the field element includes a plurality of motor magnets (90) aligned in the second direction, and an intervening portion (100) provided between two of the motor magnets aligned adjacent to each other in the second direction, and forming a magnetic path through which magnetic flux passes;
• the motor magnet is a first surface (91) and a second surface (92) aligned in the first direction; a first end (93) and a second end (94) aligned in the second direction; a plurality of orientations (OR) distributed between the first surface and the second surface and between the first end and the second end; At least some of the plurality of orientations have a first orientation component (ORa) along the first direction and a second
• the first direction is a radial direction (RD) perpendicular to a rotation axis (12) on which the field element is provided,
• the motor according to Technical Idea 11 or 12 wherein the second direction is a circumferential direction (CD) around the rotation axis.

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  • 2024-03-29 JP JP2024055135A patent/JP2025152945A/ja active Pending
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  • 2025-03-06 WO PCT/JP2025/008084 patent/WO2025204662A1/ja active Pending

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