WO2024122193A1 - Moteur linéaire, dispositif de suspension correspondant et équipement alimenté électriquement - Google Patents

Moteur linéaire, dispositif de suspension correspondant et équipement alimenté électriquement Download PDF

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Publication number
WO2024122193A1
WO2024122193A1 PCT/JP2023/037408 JP2023037408W WO2024122193A1 WO 2024122193 A1 WO2024122193 A1 WO 2024122193A1 JP 2023037408 W JP2023037408 W JP 2023037408W WO 2024122193 A1 WO2024122193 A1 WO 2024122193A1
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linear motor
axial direction
teeth
center core
motor according
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PCT/JP2023/037408
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English (en)
Japanese (ja)
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康明 青山
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日立Astemo株式会社
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  • the present invention relates to a linear motor and a suspension device and electric equipment using the same.
  • motors are cylindrical in shape, and to achieve high output, they are used in conjunction with gears to increase the motor's rotation speed and make it easier to reduce its size.
  • linear motors move in a straight line, it is difficult to install gears on them, and it is also difficult to reduce the size of linear motors by increasing their speed.
  • the space available is limited, so it is desirable to make the motor, motor and gear, and linear motor smaller.
  • linear motors are generally driven by a three-phase power supply.
  • the armature of a linear motor has three-phase windings arranged in U, V, and W phases, each with an electrical phase difference of 120°.
  • linear motors have a structure in which the motor is cut open, and the armature is composed of two ends. For this reason, one of the three-phase windings cannot be placed at the end of the armature of the linear motor, and an imbalance occurs in the magnetic and electrical circuits between the phases.
  • the linear motor of Patent Document 1 includes a cylindrical stator and a mover that is arranged on the inner circumference of the stator and is movable in the axial direction of the cylinder.
  • the stator includes a split stator core that is split into multiple parts in a direction perpendicular to the axial direction of the cylinder, a stator coil that is formed in an annular shape and is arranged in multiple slots formed by combining the multiple split stator cores, and a thermally conductive insulating resin that fills between the wires that make up the stator coil and fills and fixes one stator coil to one split stator core by pressure molding.
  • Patent Document 1 when multiple split stator cores and coils are stacked in the axial direction perpendicular to the axial direction, the spacing between the teeth and the overall length of the armature change by several millimeters due to the accumulation of errors. In this way, variations in the position and length of the teeth in the axial direction cause a large increase in pulsation in a linear motor. Patent Document 1 does not take into consideration improving dimensional accuracy in the axial direction.
  • the object of the present invention is to provide a small, high-thrust linear motor that suppresses an increase in pulsation.
  • the present invention is a linear motor in which an armature and a permanent magnet provided on the outer periphery of the armature move relative to each other in the axial direction
  • the armature is characterized in that it comprises a center core arranged in a row in the axial direction, with a portion on the inner periphery fitted in close contact with the center core, a plurality of teeth arranged in a row in the axial direction on the outer periphery of the center core, and a coil arranged between the teeth adjacent to each other in the axial direction on the outer periphery of the center core.
  • the present invention makes it possible to provide a small, high-thrust linear motor that suppresses increases in pulsation.
  • FIG. 1 is an external perspective view showing an example of a linear motor 1 according to a first embodiment of the present invention.
  • 2 is a schematic diagram of a main magnetic circuit portion of the linear motor 1 shown in FIG. 1 cut in the YZ plane.
  • FIG. 2 is an external perspective view of a center core 3 according to the first embodiment of the present invention.
  • 3 is a front view of the center core 3 in FIG. 2 as viewed from the front side in the Z direction.
  • FIG. 2 is a cross-sectional view of the center core 3 cut along the YZ plane.
  • FIG. 3 is a front view of the tooth 2 in FIG. 2 as viewed from the front side in the Z direction.
  • FIG. 2 is a cross-sectional view of the tooth 2 cut along the YZ plane.
  • FIG. 1 is a diagram showing a configuration of a suspension device 60 using a linear motor according to a first embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of the linear motor 1 according to the comparative example.
  • 6B is a diagram showing the distribution of holding force when a part of the permanent magnet 11 used in the linear motor 1 of FIG. 6A is viewed from the axial direction.
  • FIG. FIG. 1 is an exploded perspective view of a linear motor 1 according to a first embodiment. 4 is a diagram showing the distribution of holding force when a part of the permanent magnet 11 of the first embodiment is viewed from the axial direction.
  • FIG. FIG. 11 is an external perspective view showing an example of a linear motor 1 according to a second embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a main magnetic circuit portion of the linear motor 1 shown in FIG. 7 cut in the YZ plane.
  • FIG. 11 is an external perspective view of a center core 3 according to a second embodiment of the present invention, as viewed from the front side.
  • 9B is a front view of the center core 3 in FIG. 9A as viewed from the front side in the Z direction.
  • 9B is a rear view of the center core 3 in FIG. 9A as viewed from the rear side in the Z direction.
  • FIG. 2 is a cross-sectional view of the center core 3.
  • FIG. 11 is a perspective view showing a configuration of a suspension device 60 using a linear motor according to a second embodiment of the present invention.
  • FIG. 1 is an external perspective view showing an example of a linear motor 1 according to the first embodiment of the present invention.
  • FIG. 1 a schematic perspective view is shown in which a quarter of the linear motor 1 is cut so that the structure of the linear motor 1 and the armature 8 can be seen.
  • FIG. 2 is a schematic view showing the main magnetic circuit part of the linear motor 1 shown in FIG. 1 cut in the YZ plane. The configuration of the linear motor of this embodiment is described with reference to FIG. 1 and FIG. 2.
  • the direction in which the armature 8 of the linear motor 1 moves is defined as the axial direction (Z direction)
  • the circumference around the axial direction (Z direction) is defined as the "circumferential direction”
  • the direction perpendicular to the axial direction (Z direction) is defined as the radial direction (X direction, Y direction).
  • This embodiment is a linear motor 1 in which an armature 8 and a secondary member 10 equipped with permanent magnets on the outer periphery of the armature 8 move relatively in the axial direction.
  • This linear motor 1 is an 8-pole, 9-slot linear motor in which 9 teeth 2 are arranged in the Z direction for 8 magnets (8 poles) arranged in the Z direction. The two teeth 2 located at both ends in the Z direction are 1/2 of the total.
  • the teeth 2 are made up of multiple plate-shaped magnetic electromagnetic steel sheets (silicon steel sheets) stacked in the axial direction (Z direction) as in a typical motor, and multiple teeth 2 are stacked in the direction of travel (axial direction) of the linear motor 1.
  • the teeth of a typical linear motor are stacked in a direction perpendicular to the direction of travel.
  • a coil 5 is arranged between adjacent teeth 2 in the axial direction.
  • the center cores 3 are arranged on the central axis side (radially inward) of the teeth 2, and the number of center cores 3 in the axial direction is less than the number of laminated magnetic materials of the teeth 2. As described below, multiple center cores 3 are arranged side by side in the axial direction, and the parts on the inner circumference are fitted together and tightly fitted to form part of the armature 8. Multiple teeth 2 are arranged on the outer circumference side of the center cores 3.
  • the armature 8 that constitutes the magnetic circuit is composed of the teeth 2, the coil 5, and the center core 3.
  • the secondary side member 10 is composed of a plurality of permanent magnets 11 aligned in the Z direction, a magnetic back yoke 12 arranged radially outward of the permanent magnets 11, and an outer case 13 arranged radially outward of the back yoke 12.
  • the outer case 13 is formed in a rectangular shape when viewed from the Z direction.
  • the permanent magnets 11 are arranged radially outward of the teeth 2 with a gap between them so as to face the teeth 2.
  • the teeth 2 are formed in a rectangular (polygonal) shape when viewed from the axial direction, and a flat surface is formed radially outward of the teeth 2.
  • the permanent magnets 11 that face the flat surface of the teeth 2 are formed in a flat plate shape.
  • a shaft 9 (see Figure 5) is fixed to the central axis O of the center core 3 by press fitting or screwing, and the power of the linear motor 1 is obtained through this shaft 9.
  • the flow of magnetic flux is indicated by arrows on some of the teeth 2.
  • the magnetic flux changes depending on the current value of the coil 5, but the main magnetic flux that contributes to thrust passes through the path shown in FIG. At this time, magnetic flux flows mainly in the radial direction in the teeth 2.
  • magnetic flux flows mainly in the axial direction (Z direction) in the center core 3 on the inner periphery of the coil 5.
  • Z direction the axial direction
  • the direction in which magnetic flux in the laminated steel sheets flows easily is set as the magnetic path for radial magnetic flux, and the axial dimension of the center core 3 is made smaller than that of the teeth 2, taking into consideration the suppression of dimensional variation in the overlapping in the axial direction (Z direction) and the ease of magnetic flux flow in the axial direction.
  • magnetic steel sheets (silicon steel sheets) for motors only have a certain thickness (for example, 0.15 mm, 0.35 mm, 0.5 mm, etc.), when these are stacked, it is not possible to achieve the delicate pitch that was designed.
  • the center core 3 is sandwiched between adjacent teeth 2, and the spacing between the teeth 2 is determined by adjusting the axial dimension of the center core 3 sandwiched between the adjacent teeth 2.
  • the center core 3 sandwiched between adjacent teeth 2 also has the advantage of having low magnetic resistance in the axial direction, allowing for greater thrust.
  • the teeth 2 are made of electromagnetic steel plate (silicon steel plate) of a specified thickness, and a gasket 6 is provided between the center core 3 and the teeth 2 to ensure the desired pitch of the teeth 2, thereby suppressing variation in the position of the teeth 2.
  • Fig. 3A is an external perspective view of the center core 3 according to the first embodiment of the present invention.
  • Fig. 3B is a front view of the center core 3 in Fig. 3A as viewed from the front side in the Z direction.
  • Fig. 3C is a side view of the center core 3.
  • Fig. 3D is a cross-sectional view of the center core 3 cut in the YZ plane.
  • the center core 3 of this embodiment is configured to have a square shape when viewed from the front (axial direction).
  • the center core 3 has a wall portion 31 formed extending radially outward from the central axis O, and a protrusion portion 32 protruding in the axial direction (Z direction) from one side surface (front surface) of the wall portion 31.
  • the position of the radial outer end surface 32a (outer end surface in the Y direction and X direction) of the protrusion portion 32 is located radially inward, i.e., toward the central axis, from the position of the radial outer end surface 31a (outer end surface in the Y direction and X direction) of the wall portion 31.
  • a through hole 33 is formed in the center of the center core 3, penetrating along the axial direction (Z direction).
  • the radial outer end surface 31a of the wall portion 31 is formed in a flat shape.
  • the other surface (back surface) of the wall portion 31 of the center core 3 has a recess 31b recessed in the axial direction (Z direction) from the back surface side toward the front surface (one surface of the wall portion 31).
  • This recess 31b has the same shape as the protrusion 32 when viewed from the back surface side, and is formed in a square shape in this embodiment.
  • this recess 31b is formed smaller than the outer diameter dimension of the protrusion 32.
  • the recess 31b of one center core 3 is inserted into the protrusion 32 of the other center core 3 to fix the center cores 3 to each other.
  • the adjacent center cores 3 are connected to each other by a fitting structure between the recess 31b of one center core 3 and the protrusion 32 of the other center core 3.
  • a part of the armature 8 shown in FIG. 1 and FIG. 2 is formed.
  • the convex portion 32 and the concave portion 31b are rectangular when viewed from the axial direction, but the shape is not limited to this and may be polygonal or other shapes.
  • Fig. 4A is an external perspective view of the teeth 2.
  • Fig. 4B is a front view of the teeth 2 in Fig. 2 as seen from the front side in the Z direction.
  • Fig. 4C is a side view of the teeth 2.
  • Fig. 4D is a cross-sectional view of the teeth 2 cut in the YZ plane.
  • the teeth 2 are rectangular when viewed from the front, but may be polygonal.
  • the teeth 2 are formed by stacking multiple electromagnetic steel sheets 2a (silicon steel sheets), which are thin, plate-like magnetic bodies, and multiple teeth 2 are stacked in the direction of travel of the linear motor 1.
  • a through hole 2b is formed in the center of the teeth 2, penetrating along the axial direction (Z direction).
  • the through hole 2b has the same shape as the protrusion 32 of the center core 3 when viewed from the front, and is formed in a rectangular shape in this embodiment.
  • the through hole 2b is also formed to be larger than the outer diameter dimension of the protrusion 32 of the center core 3.
  • the teeth 2 are then positioned between adjacent center cores 3. That is, the convex portion 32 of the other center core 3 is inserted into the through hole 2b of the teeth 2, and the convex portion 32 of the other center core 3 is further inserted into the concave portion 31b of one center core 3 and fixed. In other words, one center core 3 is positioned between adjacent teeth 2.
  • the opposing area between the permanent magnets 11 and the teeth 2 can be increased within the cross-sectional area of a square with a given number of sides, making it possible to increase the thrust per volume.
  • a linear motor with a high thrust density can be constructed.
  • the rotational force is transmitted and a rotational force is generated around the central axis of the linear motor.
  • the teeth shape is square or polygonal, the teeth may come into contact with the permanent magnet if the rotational force causes the teeth to rotate, which may result in damage to the permanent magnet.
  • the protrusions 32 of the center core 3 are made rectangular or have a flat surface on the side (the radially outer end surface 31a), which helps to suppress the rotational force and prevents the teeth and other parts of the armature from coming into contact with the permanent magnets.
  • FIG. 5 is a diagram showing the configuration of a suspension device 60 using the linear motor according to the first embodiment of the present invention. The functions of the same reference numerals as those described in Figures 1 to 4 will not be described.
  • a ball joint 41 is attached to the left end of the shaft 9, and a tire-side shaft 42 is connected via the ball joint 41.
  • the tire-side shaft 42 is supported by a radial bearing 43, and rotates.
  • a tire mounting portion 44 for mounting a tire or the like is provided at the left end of the tire-side shaft 42.
  • a spring support 45 is also installed on the shaft 9, and a spring 46 compresses and releases as the shaft 9 moves linearly.
  • the armature 8 is connected to the outer case 13, and a vehicle-side member 47 is installed on the outer case 13. This makes it possible to make it difficult for vibrations transmitted from the tire side to be transmitted to the vehicle side.
  • a thrust bearing 48 is installed between the vehicle side member 47 and the shaft 9 to support the linear motion of the shaft 9. If the armature outer shape or permanent magnet is made flat, the gap between the armature and the permanent magnet is kept constant, so there is no rotation around the central axis.
  • FIG. 6A is an exploded perspective view of a linear motor 1 according to a comparative example.
  • FIG. 6B is a diagram showing the distribution of holding force when a portion of a permanent magnet 11 used in the linear motor 1 of FIG. 6A is viewed from the axial direction.
  • FIG. 6C is an exploded perspective view of a linear motor 1 according to Example 1.
  • FIG. 6D is a diagram showing the distribution of holding force when a portion of a permanent magnet 11 of Example 1 is viewed from the axial direction. Note that in FIGS. 6A and 6C, half of the outer case 13 has been cut off.
  • Linear motors can be made small, highly efficient, and provide high thrust by using permanent magnets with high residual magnetic flux density.
  • permanent magnets with high residual magnetic flux density.
  • the relatively inexpensive and highly functional permanent magnets used in industry are rare earth neodymium sintered magnets.
  • heat resistance of these permanent magnets can be improved by placing heavy rare earth elements such as terbium (Tb) and dysprosium (Dy) at the grain boundaries.
  • the distribution of the retentivity is as shown in FIG. 6B.
  • the darker parts have higher retentivity, and the lighter parts have lower retentivity.
  • the retentivity is high at the top and bottom of the permanent magnet 11 and low at the center. This retentivity state is similar along the left and right direction of the permanent magnet 11.
  • the retentivity decreases at both the left and right ends of the permanent magnet 11.
  • the parts with low retentivity have low heat resistance, and a large amount of heavy rare earth elements is required to increase the heat resistance there.
  • the top and bottom parts of the permanent magnet 11 have excessive retentivity, which results in the use of unnecessary heavy rare earth elements.
  • the permanent magnet 11 is made flat and made from a material with heavy rare earth elements diffused in it as shown in Figure 6C, the distribution of holding force will be as shown in Figure 6D.
  • the darker areas have higher holding force, and the lighter areas have lower holding force.
  • the holding force is high at the top and bottom of the permanent magnet 11, and low at the center.
  • a flat permanent magnet 11 as shown in Figure 6B, there is no decrease in holding force even at both the left and right ends of the permanent magnet 11, and high holding force can be obtained across the entire left-right direction of the permanent magnet 11.
  • heavy rare earth elements can be effectively utilized with a flat permanent magnet 11.
  • Linear motors differ from motors in that they use a larger amount of permanent magnets and the positions of the edges that require heat resistance are different.
  • this embodiment makes it possible to solve problems and select shapes that are unique to linear motors, thereby reducing the amount of scarce resources used and taking advantage of the directional properties of highly functional materials, while also realizing a structure that can reduce the variation in dimensional accuracy of the teeth in the direction of travel, which was a major issue with linear motors.
  • the linear motor 1 of the second embodiment has a circular shape when viewed from the axial direction (Z direction).
  • FIG. 7 is an external perspective view showing an example of a linear motor 1 according to a second embodiment of the present invention.
  • a schematic perspective view is shown in which a quarter of the linear motor 1 is cut away so that the structure of the linear motor 1 and the armature 8 can be seen.
  • FIG. 8 is a schematic view of the main magnetic circuit portion of the linear motor 1 shown in FIG. 7 cut away in the YZ plane.
  • the armature of the linear motor 1 of the second embodiment is composed of teeth 2 made of multiple plate-shaped magnetic bodies stacked in the axial direction, coils 5 sandwiched between the teeth 2 in the axial direction, and a center core 3 arranged on the central axis side of these.
  • center cores 3 made of magnetic material are arranged in the axial direction, and the axial faces of the center cores 3 are in close contact with each other in the axial direction to suppress an increase in magnetic resistance.
  • the teeth 2 are positioned by pressing them against the center core 3 in the axial direction. This allows the axial position of the teeth 2 to be determined precisely by the position of the surface of the center core 3, making it possible to create a linear motor with minimal pulsation.
  • the necessary axial width of the teeth 2 is made of plate material, and the teeth 2 made of such material are pressed against the center core 3 from the axial direction. If a gap is created between the teeth 2 and the center core 3, it is recommended to sandwich a gasket (not shown) or a material that fills the gap to determine the axial position.
  • the permanent magnet 11 provided on the outer periphery of the armature is made by attaching multiple arc-shaped magnets in the circumferential direction, or by using a ring-shaped permanent magnet 11.
  • a magnetic back yoke 12 is provided on the outer periphery to increase the permeance of the permanent magnet 11. This magnetic back yoke 12 can also serve as the outer case.
  • Fig. 9A is an external perspective view of the center core 3 according to the second embodiment of the present invention, as seen from the front side.
  • Fig. 9B is a front view of the center core 3 in Fig. 9A, as seen from the front side in the Z direction.
  • Fig. 9C is a rear view of the center core 3 in Fig. 9A, as seen from the rear side in the Z direction.
  • Fig. 9D is a cross-sectional view of the center core 3.
  • the center core 3 in this embodiment is configured to be circular when viewed from the front.
  • the center core 3 includes a wall portion 35 formed extending radially outward from the central axis O, an insertion portion forming convex portion 37 protruding from one face (front) of the wall portion 35 toward the outside (front side) in the axial direction (Z direction), and a back side convex portion 36 (convex portion) protruding from the other face (back side) of the wall portion 35 toward the outside (back side) in the axial direction (Z direction).
  • the back side convex portion 36 is formed in a polygonal shape when viewed from the axial direction (Z direction), and is formed in a square shape in this embodiment.
  • a flat radial outer surface 36a is formed on the radial outside of the rear side convex portion 36.
  • the position of the radial outer surface 36a (outer end surface in the Y and X directions) of the rear side convex portion 36 is located radially inward, i.e., toward the central axis, relative to the position of the radial outer peripheral surface 35a of the wall portion 35.
  • a through hole 33 is formed in the central portion of the center core 3, penetrating along the axial direction (Z direction).
  • An R portion 36b is formed between (at the corners of) adjacent radial outer surfaces 36a in the circumferential direction.
  • the insertion portion forming convex portion 37 is arranged so that the inner wall surface 37a of the insertion portion forming convex portion 37 faces the central axis O.
  • the inner wall surface 37a is formed in a flat shape.
  • a notch portion 37b is formed between adjacent insertion portion forming convex portions 37 in the circumferential direction (at the corners).
  • the radial outer surface (outer peripheral surface) of the insertion portion forming convex portion 37 is formed in an arc shape.
  • an insertion section 38 is formed on the front side of the center core 3, surrounded by the inner wall surfaces 37a of multiple (four) insertion section forming protrusions 37.
  • this insertion section 38 has the same polygonal shape as the rear side protrusions 36, and in this embodiment, it is formed in a square shape.
  • the outer diameter of the rear convex portion 36 is smaller than the inner diameter of the insertion portion 38. Then, multiple center cores 3 are lined up in the axial direction (Z direction), and the rear convex portion 36 of one center core 3 is inserted into the insertion portion 38 of the other center core 3. In other words, adjacent center cores 3 are connected to each other by a fitting structure in which the rear convex portion 36 of one center core 3 fits into the insertion portion 38 of the other center core 3. Multiple center cores 3 are connected to each other to form a part of the armature 8 shown in Figures 7 and 8.
  • the radial outer surface 36a of the rear side convex portion 36 faces the inner wall surface 37a of the insertion portion forming convex portion 37.
  • the R portion 36b of the rear side convex portion 36 is exposed, and the R portion 36b of the rear side convex portion 36 and the radial outer surface (outer peripheral surface) of the insertion portion forming convex portion 37 are flush with each other.
  • the teeth 2 stacked in the axial direction (Z direction) are arranged radially outward of the R portion 36b of the rear side convex portion 36 and the radial outer surface (outer peripheral surface) of the insertion portion forming convex portion 37.
  • the radially outer surface 36a of the rear side convex portion 36 and the inner wall surface 37a of the insertion portion forming convex portion 37 are in flat contact with each other, so that the connected center cores 3 can be prevented from rotating in the circumferential direction.
  • a rotational force may be applied to the shaft 9 or rod 49 (FIG. 10) arranged in the linear motor 1 due to steering operation or climbing over a bump on the road, which may cause twisting or deformation of the armature 8 including the center core 3.
  • center cores 3 are connected to each other in a concentric shape, when a rotational force is applied to the shaft 9 or rod 49, adjacent center cores 3 may twist or deform, causing breaks in the coil wiring or loosening of various parts, which may be a cause of noise and vibration.
  • the rear side convex portion 36 of one center core 3 is made rectangular (polygonal)
  • the insertion portion 38 of the other center core 3 is made the same shape as the rear side convex portion 36
  • the flat radial outer surface 36a of the rear side convex portion 36 and the flat inner wall surface 37a of the insertion portion forming convex portion 37 are made to face each other and come into contact, so twisting and deformation of the center cores 3 can be suppressed.
  • noise and vibration caused by the wiring of the coil 5 and loosening of each part can be suppressed.
  • FIG. 10 is a perspective view showing the configuration of a suspension device 60 using a linear motor according to the second embodiment of the present invention.
  • a rod 49 is inserted into the inner circumference of the armature of the linear motor 1 and is supported by a radial bearing 43.
  • a tire mounting part 44 is provided at one end of the rod 49.
  • the rod 49, the permanent magnet 11 of the linear motor 1, and the outer case 13 receive vibrations from the road surface through the tire and move simultaneously.
  • a spring support 45 is provided on the outer case 13, and a spring 46 is compressed as the outer case 13 moves.
  • a thrust bearing 48 is provided on the opposite side of the tire of the rod 49, and slides on the inner circumference of the armature or the inner circumference of a shaft 9 (hollow pipe member) arranged on the inner circumference of the armature.
  • a cap 50 is provided on the outer case 13 to prevent dust and the like from entering the vicinity of the linear motor.
  • the linear motors described in Examples 1 and 2 are of the outer magnet type, with the armature located on the central axis and secondary components such as the permanent magnets and back yoke located on the anti-central axis side (outer periphery), but are not limited to this structure as long as a similar effect can be obtained.
  • a permanent magnet may be attached to the surface of a shaft or rod, and teeth, coils, and a center core may be located on the outer periphery.
  • the linear motor 1 is applied to a suspension device, but it may be applied to other electric devices.
  • the rack bar of a rack-and-pinion mechanism that constitutes an electric power steering system may be driven by the linear motor 1 of the first and second embodiments.
  • the mechanism that presses the brake pads and the piston that generates the brake hydraulic pressure may be driven by the linear motor 1 of the first and second embodiments.

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  • Engineering & Computer Science (AREA)
  • Linear Motors (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)

Abstract

Le but de la présente invention est de fournir un moteur linéaire compact, à forte poussée, qui supprime toute augmentation de l'ondulation.　Dans un moteur linéaire 1 selon la présente invention, un induit 8 et des aimants permanents 11 qui sont disposés sur le côté de la périphérie externe de l'induit 8 se déplacent l'un par rapport à l'autre dans une direction axiale.　L'induit 8 comprend : une pluralité de noyaux centraux 3 qui sont alignés dans la direction axiale, les parties de ces noyaux qui se trouvent sur le côté périphérique interne étant étroitement ajustées ; une pluralité de dents 2 qui sont alignées dans la direction axiale sur le côté périphérique externe des noyaux centraux 3, les dents 2 étant constituées d'une pluralité de corps magnétiques tabulaires empilés dans la direction axiale ; et des bobines 5 qui sont positionnées entre les paires de dents 2 adjacentes dans la direction axiale sur le côté périphérique externe des noyaux centraux 3.
PCT/JP2023/037408 2022-12-08 2023-10-16 Moteur linéaire, dispositif de suspension correspondant et équipement alimenté électriquement WO2024122193A1 (fr)

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JP2022196138A JP2024082351A (ja) 2022-12-08 2022-12-08 リニアモータおよびそれを用いたサスペンション装置、並びに電動機器
JP2022-196138 2022-12-08

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012205397A (ja) * 2011-03-25 2012-10-22 Toyota Central R&D Labs Inc リニア駆動／発電装置
JP2020178443A (ja) * 2019-04-18 2020-10-29 三菱電機株式会社 同期リニアモータおよび同期リニアモータの製造方法
JP2022022487A (ja) * 2020-06-24 2022-02-07 日立Astemo株式会社 電磁サスペンション

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012205397A (ja) * 2011-03-25 2012-10-22 Toyota Central R&D Labs Inc リニア駆動／発電装置
JP2020178443A (ja) * 2019-04-18 2020-10-29 三菱電機株式会社 同期リニアモータおよび同期リニアモータの製造方法
JP2022022487A (ja) * 2020-06-24 2022-02-07 日立Astemo株式会社 電磁サスペンション

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