JP2020022236A - motor - Google Patents

Abstract

To enable reduction in a load on a rotating rotor.SOLUTION: The motor includes a container 2 having an internal space that has an inner pressure lower than the atmospheric pressure, a shaft 3 that is disposed in the container 2, a rotor 4 that is supported in the container 2 by the shaft 3, a first magnetic member 7A that is supported in the container 2 by the shaft 3, and a second magnetic member 7B that faces the first magnetic member 7A at the outside, in the longitudinal direction of the shaft 3, of the container 2. A magnetic force is generated between the first magnetic member 7A and the second magnetic member 7B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor.

  As a technique related to the motor, on the outer peripheral surface of the spider, half of the number of poles are radially arranged with respect to every other rotor core in the rotor circumferential direction so as to surround the side surface, and each half is larger than the maximum width of each rotor core. 2. Description of the Related Art A field superconducting rotating machine including a vacuum container having an inner peripheral surface having a width is known (see Patent Document 1). In the field superconducting rotating machine disclosed in Patent Literature 1, half of the number of poles of the superconducting coil is stored in the vacuum vessel along the inner peripheral surface.

JP 2017-220997 A

  By the way, in the motor, the air around the rotor becomes a resistance, and is a load of rotation. In a motor, as the rotation speed of the rotor increases, the load due to air resistance increases.

  However, the motor disclosed in Patent Literature 1 does not consider reducing the air resistance when the rotor rotates.

  The present invention exemplifies the above-described problem as an example, and has an object to provide a motor that can reduce a load on a rotating rotor.

  In order to achieve the above object, a motor according to the present invention includes a container having an internal space having an internal pressure lower than the atmospheric pressure, a shaft in the container, and a rotor supported by the shaft in the container, A first magnetic member supported by the shaft in the container, and a second magnetic member facing the first magnetic member outside the container in a longitudinal direction of the shaft, wherein the first magnetic member and the second magnetic member are provided. Magnetic force is generated between the members.

  In the motor according to one aspect of the present invention, a part of the container is disposed between the first magnetic member and the second magnetic member, and in the longitudinal direction of the shaft, a part of the container and the first magnetic member and A predetermined gap is provided between a part of the container and the second magnetic member.

  In the motor according to one embodiment of the present invention, the first magnetic member and the second magnetic member rotate together with the rotor.

  In the motor according to one embodiment of the present invention, the second magnetic member is provided with an output unit that transmits a rotational force to the outside.

  In the motor according to one aspect of the present invention, the first magnetic member and the second magnetic member are not in contact with each other, and the first magnetic member, the second magnetic member, and the output unit form a power transmission unit.

  In the motor according to one embodiment of the present invention, the rotor includes a yoke and a magnet.

  A motor according to one embodiment of the present invention includes a stator having a magnetic member and a coil wound around the magnetic member.

  In the motor according to one aspect of the present invention, the container is formed of a non-magnetic member.

  In the motor according to one aspect of the present invention, the non-magnetic member is formed of ceramic.

  In the motor according to one embodiment of the present invention, the internal space of the container is in a vacuum.

  According to the motor according to the present invention, the load on the rotating rotor can be reduced.

1 is a perspective sectional view schematically showing a configuration of a motor according to an embodiment of the present invention. FIG. 2 is a sectional view schematically showing a configuration of the motor shown in FIG. 1. FIG. 2 is a schematic diagram illustrating an example of a first magnetic member and a second magnetic member of a power transmission unit in the motor illustrated in FIG. 1. FIG. 2 is a perspective view showing a rotor main body and a stator main body in the motor shown in FIG. 1. FIG. 2 is a schematic diagram illustrating a state of conduction of a U-phase conductive wire of a stator main body in the motor illustrated in FIG. 1. FIG. 2 is a schematic diagram illustrating a state of conduction of a V-phase conductive wire of a stator main body in the motor illustrated in FIG. 1. FIG. 2 is a schematic diagram showing a state of conduction of a W-phase conductive wire of a stator main body in the motor shown in FIG. 1.

  Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings.

[Overall configuration of motor]
An overall configuration of a motor according to an embodiment of the present invention will be described.
FIG. 1 is a perspective sectional view schematically showing a configuration of a motor 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically illustrating the configuration of the motor 10.

  In the following description, the direction of the axis x is the longitudinal direction of the shaft 3. In the following description, the direction perpendicular to the direction of the axis x (hereinafter, also referred to as “radial direction”) shown in FIGS. In the following description, for convenience, the direction of arrow a in the direction of the axis x is defined as upper side a (left direction in FIG. 2), and the direction of arrow b is defined as lower side b (right direction in FIG. 2). In the radial direction, the direction away from the axis x (the direction of arrow c in FIG. 2) is defined as the outer peripheral side c, and the direction toward the axis x (the direction of arrow d in FIG. 2) is defined as the inner peripheral side d.

  As shown in FIGS. 1 and 2, the motor 10 includes a container 2 having an internal space having an internal pressure lower than the atmospheric pressure, and a shaft 3 serving as a rotation shaft in the container 2. The container 2 is formed using a non-magnetic member, and the pressure in the internal space is set lower than the atmospheric pressure. The shaft 3 is housed in the container 2. The motor 10 includes a rotor 4 supported by the shaft 3 in the container 2, a stator 5 surrounding the rotor 4, and an output unit 6 provided outside the container 2. The output unit 6 is arranged to face one end 31 of the shaft 3 in the longitudinal direction of the shaft 3. The motor 10 includes a first magnetic member 7A supported by the shaft 3 inside the container 2, and a second magnetic member 7B facing the first magnetic member 7A outside the container 2 in the longitudinal direction of the shaft 3. , Is provided. Magnetic force is generated between the first magnetic member 7A and the second magnetic member 7B. The motor 10 is provided between the one end 31 of the shaft 3 and the one end 61 of the output unit 6, and transmits the torque of the rotor 4 to the output unit 6 in a non-contact manner by a magnetic force passing through the container 2. The power transmission unit 7 is configured. The power transmission unit 7 includes a first magnetic member 7A and a second magnetic member 7B. The first magnetic member 7 </ b> A is provided at one end 31 of the shaft 3 and generates a magnetic field in the direction from the one end 31 to the output unit 6. The second magnetic member 7B is provided to face the first magnetic member 7A in the output section 6, and generates a magnetic field in the direction of the first magnetic member 7A. Hereinafter, a motor 10 according to an embodiment of the present invention will be described with reference to the drawings.

  The housing 1 has, for example, a cylindrical shape whose longitudinal direction is the longitudinal direction of the shaft 3 (hereinafter, referred to as an axis x direction). In the present embodiment, the housing 1 is formed of a metal member. The housing 1 includes a cylindrical portion 1a and two lids 1b and 1c for closing an opening of the cylindrical portion 1a. Of the two lids 1b and 1c, the lid 1b faces the bottom of the container 2 in the axis x direction of the shaft 3. The housing 1 houses the components of the motor 10 including the container 2, the rotor 4, the stator 5, the output unit 6, and the power transmission unit 7. The housing 1 has a space inside to accommodate the above-described components.

  The housing 1 is not limited to the above example as long as the housing 1 can accommodate the components of the motor 10. The housing 1 may have, for example, a substantially cylindrical shape in which a part of a cylindrical shape is deformed, or a prism shape.

  The container 2 is disposed inside the housing 1 and includes a cylindrical portion 2a, a bottom portion 2b, and a lid 21 described later. The container 2 is formed of a non-magnetic member. The container 2 has a space inside to accommodate the components of the rotor 4 of the motor 10. The outer space and the inner space of the container 2 are isolated from each other by the lid 21 that forms the shape of the container 2. The inner space of the container 2 isolated from the outside by the lid 21 is set to a pressure (for example, vacuum) lower than the atmospheric pressure. The pressure inside the container 2 is appropriately determined. The space inside the container 2 may be filled with a gas having a density lower than that of air, such as helium.

  The container 2 has a shape in which, for example, both the shaft 3 and the rotor 4 can rotate around an axis x in an internal space. The specific shape of the container 2 is, for example, a cylindrical shape whose longitudinal direction is the axis x direction. The container 2 is formed using a non-magnetic member. The container 2 is desirably formed using a ceramic (specifically, fine ceramics or the like) which is an example of a non-magnetic member.

  The shape of the container 2 is not limited to the above example as long as it has a space inside and the shaft 3 and the rotor 4 can rotate in this space.

  The shaft 3 is arranged inside the container 2 with the axis x direction as a longitudinal direction. The shaft 3 is a member of a round bar whose longitudinal direction is the direction of the axis x. The shaft 3 rotates around the axis x in the container 2. The shaft 3 is formed using a magnetic member such as SUS420 stainless steel specified by JIS (Japanese Industrial Standards).

  The rotor 4 includes a rotor body 4A and a rotor body 4B. The rotor main bodies 4A and 4B are columnar rotating bodies whose length in the radial direction is longer than the length in the direction of the axis x with the axis x as the central axis. The rotor bodies 4A and 4B are fixed to the shaft 3 with the longitudinal direction being the axis x direction. The rotor main body 4A and the rotor main body 4B are fixed to the shaft 3 at predetermined intervals in the longitudinal direction.

  The stator 5 is arranged inside the housing 1 and outside the container 2, and surrounds the rotor 4. The stators 5 are provided corresponding to the number of the rotors 4. Specifically, the stator 5 includes a stator main body 5A disposed at a position facing the rotor main body 4A and a stator main body 5B disposed at a position facing the rotor main body 4B in the radial direction of the motor 10. Prepare. Detailed configurations of the rotor bodies 4A, 4B and the stator bodies 5A, 5B will be described later. The stator 5 is provided inside the housing 1 and outside the container 2 in FIGS. 1 and 2, but the present invention is not limited to this. The stator 5 may be provided inside the container 2, for example, and may be fixed to the cylindrical portion 2 a of the container 2. Further, in the motor 10, two of the rotor main bodies 4A and 4B are provided as a set of rotors 4, and two of the stator main bodies 5A and 5B are provided as a set of stators 5. In the present invention, the configurations of the rotor and the stator are as follows. It is not limited to this.

  The output unit 6 is provided outside the container 2 on an axis x that is coaxial with the shaft 3 that is the rotation axis of the rotor 4. The output unit 6 is provided outside the container 2 so as to face the one end 31 of the shaft 3. One end 31 of the shaft 3 is provided on the lid 21 side of the container 2 or on the lid 1b side of the housing 1. The output unit 6 outputs the torque generated by the motor 10 to the outside. Since the lid 21 of the container 2 is provided between the output unit 6 and the shaft 3, the output unit 6 is not connected so that the rotational force from the shaft 3 can be transmitted mechanically.

  As shown in FIG. 1, the power transmission unit 7 is provided between one end 31 of the shaft 3 and one end 61 of the output unit 6. Due to the interposition of the lid 21 of the container 2 as described above, the one end 31 of the shaft 3 and the one end 61 of the output unit 6 are not mechanically connected. For this reason, the power transmission unit 7 transmits the rotational force from the shaft 3 to the output unit 6 through the lid 21 of the container 2 using magnetic force.

[Configuration of power transmission unit]
The configuration of the power transmission unit 7 included in the motor 10 according to the present embodiment will be described.

  The power transmission unit 7 is also called a magnetic gear, a magnetic coupling, a magnetic coupling, or the like. The power transmission unit 7 includes a first magnetic member 7A and a second magnetic member 7B having surfaces extending in a direction perpendicular to the axis x direction.

  As shown in FIGS. 1 and 2, a part of the container 2 is disposed between the first magnetic member 7 </ b> A and the second magnetic member 7 </ b> B. A predetermined gap 7C is provided between the first magnetic member 7A and a part of the container 2 and the second magnetic member 7B. The first magnetic member 7A and the second magnetic member 7B rotate together with the rotor 4. The first magnetic member 7A and the second magnetic member 7B are not in contact with each other, and the first magnetic member 7A, the second magnetic member 7B, and the output unit 6 form a power transmission unit 7. The second magnetic member is provided with an output unit 6 for transmitting the rotational force of the rotor 4 to the outside.

  FIG. 3 is a schematic diagram illustrating an example of the first magnetic member 7A and the second magnetic member 7B of the power transmission unit 7 of the motor 10. As shown in FIG. 3, the first magnetic member 7A and the second magnetic member 7B are respectively provided with S poles 71A and 71B and N poles 72A and 72B of the permanent magnet in regions divided radially from the center into predetermined sections. The magnetic poles are alternately arranged in the circumferential direction. In the power transmission unit 7, a magnetic field is formed in a gap 7C between the first magnetic member 7A and the second magnetic member 7B, and the gap 7C is a so-called magnetic gap. Specifically, in a state where the power transmission unit 7 is attached to the motor 10 as shown in FIGS. 1 and 2, the first magnetic member 7A is in the direction of the second magnetic member 7B, and the second magnetic member 7B is in the first magnetic member 7B. Magnetic force is generated in the direction of the magnetic member 7A.

  The power transmission unit 7 attracts the S pole 71A of the first magnetic member 7A and the N pole 72B of the second magnetic member 7B, and the N pole 72A of the first magnetic member 7A and the S pole 71B of the second magnetic member 7B to each other. Demonstrate the power to fit. The power transmission unit 7 transmits the rotational motion of the first magnetic member 7A to the second magnetic member 7B in a non-contact manner by the attractive magnetic force between the first magnetic member 7A and the second magnetic member 7B. Here, the container 2 is formed to have magnetic permeability using fine ceramics, which is a non-magnetic member as described above. The power transmission unit 7 allows the magnetic force of the first magnetic member 7A and the second magnetic member 7B to be reduced even if the lid 21 of the container 2 is interposed between the first magnetic member 7A and the second magnetic member 7B. , The torque of the shaft 3 inside the container 2 can be transmitted to the output unit 6 outside the container 2. Note that the number and arrangement of the magnetic poles of the power transmission unit 7 and the shapes of the first magnetic member 7A and the second magnetic member 7B are not limited to the above examples.

  With the configuration of the power transmission unit 7 described above, the motor 10 can transmit the torque of the rotor bodies 4A and 4B and the shaft 3 rotating in the space inside the container 2 isolated from the outside to the outside. .

[Configuration of rotor and stator]
The configurations of the rotor bodies 4A and 4B and the stator bodies 5A and 5B included in the motor 10 according to the present embodiment will be described.
FIG. 4 is a perspective view schematically showing the rotor main bodies 4A and 4B and the stator main bodies 5A and 5B in the motor 10. In FIG. 4, for the sake of explanation, only the combination of one set of the rotor bodies 4A, 4B and the stator bodies 5A, 5B is shown while maintaining the arrangement of the motor 10 inside the housing 1 and the container 2.

  The rotor bodies 4A and 4B have a roughly cylindrical or substantially cylindrical shape. In FIG. 4, the rotor 4 has a flat cylindrical shape whose radial length is larger than the axial length in the x direction. The rotor bodies 4A and 4B include yokes 41A and 41B, holes 42A and 42B, protrusions 43A and 43B, magnets 44A and 44B, and recesses 45A and 45B.

  The yokes 41A, 41B define the above-described general shape of the rotor bodies 4A, 4B. The yokes 41A and 41B are formed of a magnetic material.

  The holes 42A and 42B are through holes formed at the centers of the above-described cylindrical or substantially cylindrical yokes 41A and 41B. The holes 42A and 42B are provided for penetrating the rotor main bodies 4A and 4B through the shaft 3.

  The protrusions 43A and 43B are provided on the outer peripheral surfaces of the yokes 41A and 41B. The protrusions 43A and 43B form a gap between the poles of the magnets 44A and 44B. On the outer peripheral surfaces of the yokes 41A and 41B, concave portions 45A and 45B capable of accommodating magnets 44A and 44B attached to the yokes 41A and 41B are provided between the convex portions 43A and 43B. The convex portions 43A, 43B and the concave portions 45A, 45B are formed so that when the magnets 44A, 44B are attached to the yokes 41A, 41B, they have the same or substantially the same height as the magnets 44A, 44B. The convex portions 43A and 43B and the concave portions 45A and 45B are provided corresponding to the number of the magnets 44A and 44B. In the present embodiment, four convex portions 43A and 43B and four concave portions 45A and 45B are provided. It is desirable that the gap formed by the protrusions 43A and 43B be slightly wider between the poles of the plurality of magnets 44A and 44B.

  Four magnets 44A, 44B are provided corresponding to the recesses 45A, 45B of the yokes 41A, 41B. The outer surfaces 441A and 441B of the magnets 44A and 44B have a shape corresponding to the outer portions of the yokes 41A and 41B. The magnets 44A, 44B have inner peripheral surfaces 442A, 442B having a shape corresponding to the shapes of the recesses 45A, 45B of the yokes 41A, 41B. As the magnets 44A and 44B, for example, NdFeB (neodymium-based) bonded magnets can be used.

  The rotor main bodies 4A and 4B having the above-described configuration are four-pole surface magnet (SPM) type rotors provided with four magnets 44A and 44B on the outer peripheral surfaces of the yokes 41A and 41B. The rotor bodies 4A, 4B are supported by the shaft 3 by inserting the holes 42A, 42B into the shaft 3. The rotor bodies 4A and 4B supported by the shaft 3 rotate together with the shaft 3. The protrusions 43A, 43B provided on the yokes 41A, 41B and the outer peripheral surfaces 441A, 441B of the magnets 44A, 44B form the outer peripheral surfaces of the rotor bodies 4A, 4B.

  The stator main bodies 5A and 5B include stator cores 51A and 51B, slots 52A and 52B as magnetic pole portions, coils 53A and 53B, and rotor coils 54A and 54B. Specifically, the stator bodies 5A and 5B are arranged at positions corresponding to the rotor 4 in the axis x direction and at positions further away from the center than the rotor bodies 4A and 4B in the radial direction.

  The stator cores 51A and 51B are formed in a substantially cylindrical shape by, for example, stacking a plurality of electromagnetic steel sheets as magnetic bodies. In the longitudinal direction of the shaft 3, a concave portion and a convex portion are provided on a surface of two electromagnetic steel plates facing each other, among the multiple electromagnetic steel plates, and the concave portion and the convex portion are fitted to each other to form a plurality of electromagnetic steel plates. The magnetic steel sheets are fixed to each other. The stator cores 51A, 51B are provided with a plurality of (for example, 24) slots 52A, 52B inside the annular outer peripheral portions 511A, 511B. At the center of the stator cores 51A and 51B, rotor housing portions 512A and 512B are provided as substantially columnar spaces capable of housing the rotor main bodies 4A and 4B.

  The slots 52A and 52B are provided inside the outer peripheral portions 511A and 511B of the stator cores 51A and 51B as described above. The slots 52A, 52B extend from the outer peripheral portions 511A, 511B of the stator cores 51A, 51B toward the center. For example, 24 slots 52A, 52B are formed in the stator bodies 5A, 5B. Note that the number of slots 52A and 52B is not limited to the above example.

  Each of the coils 53A and 53B is formed of a conductor wound around an insulator that covers an outer surface of the stator cores 51A and 51B between the slots 52A and 52B. The insulator only needs to be provided between the coils 53A and 53B and the slots 52A and 52B to insulate the coils 53A and 53B from the slots 52A and 52B. Since the outer surface may be formed so as to be covered with a coating, a known material can be used. Electric power such as electric current is supplied to the coils 53A and 53B for controlling the rotation of the motor in order to rotate the rotor main bodies 4A and 4B in the rotor accommodating portions 512A and 512B of the stator 5 by magnetic force.

  The rotor coils 54A and 54B that hold the rotor 4 with respect to the container 2 are arranged at positions different from the coils 53A and 53B in the radial direction. Specifically, the rotor coils 54A and 54B are formed by winding a conductive wire around a part of the stator cores 51A and 51B between the plurality of slots 52A and 52B, and are located at positions different from the coils 53A and 53B. Electric power such as current is supplied to the rotor coils 54A and 54B so that the entire rotor 4 including the rotor main bodies 4A and 4B is floated by magnetic force in the rotor accommodating portions 512A and 512B of the stator main bodies 5A and 5B.

  Inside the housing 1, the stator bodies 5A, 5B are arranged so as to surround the rotor bodies 4A, 4B housed inside the container 2. A magnetic gap including the inner space of the container 2 and the lid 21 is provided between the rotor housing portions 512A, 512B of the stator cores 51A, 51B and the outer peripheral surfaces of the rotor main bodies 4A, 4B.

[Electrification operation to stator]
An operation of energizing stator bodies 5A and 5B included in motor 10 according to the present embodiment will be described. As will be described below, the motor 10 energizes the three phases U, V, and W to float and rotate the rotor bodies 4A and 4B. Specifically, in each of the U-phase, V-phase, and W-phase, the motor 10 is energized through the conductors of the four-pole coils 53A and 53B that are located symmetrically with respect to the center point through which the axis x passes. Here, the coils 53A and 53B rotate the rotor main bodies 4A and 4B by energizing two adjacent conductors at each pole. Further, in each of the U-phase, V-phase, and W-phase, the motor 10 is energized to the conductors of the two-pole rotor coils 54A and 54B located symmetrically with respect to the center point through which the axis x passes. Here, the rotor coils 54A and 54B float on the rotor main bodies 4A and 4B by energizing the conductors of the two adjacent rotor coils 54A and 54B at each pole.

  FIG. 5 is a schematic diagram showing the energized state of the U-phase lead wires of stator bodies 5A and 5B in motor 10. 5 to 7, the stator bodies 5A and 5B show a state viewed from the upper side a to the lower side b. As shown in FIG. 5, the coils 53A and 53B that are energized in the U phase are four sets of conductive wires of groups 53U1, 53U2, 53U3, and 53U4. In the groups 53U1 and 53U3, current flows in the lower b direction. In the groups 53U2 and 53U4, current flows in the upper direction a. The rotor coils 54A and 54B that are energized in the U phase are two sets of conducting wires of the groups 54U1 and 54U2. In the group 54U1, current flows in the upper direction a. In the group 54U2, current flows in the lower b direction.

  FIG. 6 is a schematic diagram showing the energized state of the V-phase lead wires of stator bodies 5A and 5B in motor 10. As shown in FIG. 6, the coils 53A and 53B energized in the V phase are four sets of conductors of groups 53V1, 53V2, 53V3 and 53V4. In the groups 53V1 and 53V3, current flows in the upper direction a. In the groups 53V2 and 53V4, current flows in the lower b direction. The rotor coils 54A and 54B energized in the V phase are two sets of conducting wires of the groups 54V1 and 54V2. In the group 54V1, a current flows in the upper direction a. In the group 54V2, current flows in the lower b direction.

  FIG. 7 is a schematic diagram showing the energized state of the W-phase conductors of stator bodies 5A and 5B in motor 10. As shown in FIG. 7, the coils 53A and 53B energized in the W phase are four sets of conductors of groups 53W1, 53W2, 53W3 and 53W4. In the groups 53W1 and 53W3, current flows in the upper direction a. In the groups 53W2 and 53W4, current flows in the lower b direction. The rotor coils 54A and 54B energized in the W phase are two sets of conducting wires of the groups 54W1 and 54W2. In the group 54W1, a current flows in the lower b direction. In the group 54V2, current flows in the upper direction a.

  The motor 10 is energized and exerts a magnetic force between the rotor bodies 4A, 4B and the stator bodies 5A, 5B. The rotor bodies 4A, 4B float in the rotor housing portions 512A, 512B of the stator bodies 5A, 5B due to the repulsive force of the magnetic force of the rotor coils 54A, 54B and the magnetic force of the stator bodies 5A, 5B. The floating rotor bodies 4A, 4B rotate in the rotor housing portions 512A, 512B of the stator bodies 5A, 5B due to the repulsive force of the magnetic force of the coils 53A, 53B and the magnetic force of the stator bodies 5A, 5B.

  In the motor 10 according to the present embodiment described above, the rotor 4 rotating around the axis x direction is formed of a non-magnetic member, and is housed in the container 2 in which the internal space is maintained at a pressure lower than the atmospheric pressure. Is done.

  Since the shaft 3 and the rotor 4 are accommodated in the container 2 maintained at an air pressure lower than the atmospheric pressure, for example, in a vacuum state, the density of air inside the container 2 is reduced. Therefore, the air resistance generated when the rotor 4 rotates in the motor 10 is reduced, and the load due to the rotation can be reduced.

  The motor 10 is configured to transmit the rotational force of the shaft 3 to the output unit 6 by magnetic force between the motor 10 and the output unit 6 provided outside the container 2 and facing the end of the shaft 3 in the axis x direction. Power transmission unit 7 is provided. Thereby, the motor 10 can transmit the rotational force to the outside while maintaining the air pressure inside the container 2 lower than the outside. For this reason, the motor 10 can reduce the load due to rotation.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the motor 10 according to the embodiments of the present invention, but covers all aspects included in the concept of the present invention and the claims. Including. In addition, the components may be appropriately selectively combined so as to achieve at least a part of the above-described problems and effects. For example, the shapes, materials, arrangements, sizes, and the like of the components in the above-described embodiment can be appropriately changed depending on the specific usage of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Container, 3 ... Shaft, 4 ... Rotor, 4A ... Rotor main body, 4B ... Rotor main body, 5 ... Stator, 5A, 5B ... Stator main body, 6 ... Output part, 7 ... Power transmission part, 7A ... 1st magnetic member, 7B ... 2nd magnetic member, 7C ... gap, 10 ... motor, 21 ... lid, 31 ... one end, 41A, 41B ... yoke, 42A, 42B ... hole, 43A, 43B ... convex, 44A, 44B: magnet, 45A, 45B: recess, 51A, 51B: stator core, 52A, 52B: slot, 53A, 53B: coil, 54A, 54B: rotor coil, 61: one end, 71A, 71B: S pole, 72A , 72B ... N pole, 441A, 441B ... outer peripheral surface, 442A, 442B ... inner peripheral surface, 511A, 511B ... outer peripheral portion, 512A, 512B ... rotor housing portion

Claims (10)

A container having an internal space having an internal pressure lower than the atmospheric pressure,
A shaft in the container;
A rotor supported by the shaft in the container;
A first magnetic member supported by the shaft in the container;
A second magnetic member facing the first magnetic member outside the container in a longitudinal direction of the shaft,
A motor in which a magnetic force is generated between the first magnetic member and the second magnetic member. A part of the container is arranged between the first magnetic member and the second magnetic member,
In the longitudinal direction of the shaft, a predetermined gap is provided between a part of the container, the first magnetic member, and a part of the container and the second magnetic member,
The motor according to claim 1. The first magnetic member and the second magnetic member rotate together with the rotor.
The motor according to claim 1. The second magnetic member is provided with an output unit that transmits a rotational force to the outside,
The motor according to claim 1. The first magnetic member and the second magnetic member are not in contact with each other,
The first magnetic member, the second magnetic member, and the output unit form a power transmission unit,
The motor according to claim 4. The rotor,
Comprising a yoke and a magnet,
The motor according to claim 1. A stator having a magnetic member and a coil wound around the magnetic member,
The motor according to claim 1. The container is formed of a non-magnetic member,
The motor according to any one of claims 1 to 7. The non-magnetic member is formed of ceramic,
A motor according to claim 8. The interior space of the container is vacuum;
The motor according to claim 1.

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