JP7391820B2 - Electric motor - Google Patents

Description

The present invention relates to an electric motor.

Conventionally, devices using a coil substrate as an electric motor have been proposed.
For example, the device described in Patent Document 1 is configured as follows. That is, it consists of a disk-shaped rotor fixed to a rotating shaft, and permanent magnets fixed to the rotor, whose magnetized direction is parallel to the axis of the rotating shaft, and whose magnetized directions alternate. A field having an even number of magnetic poles on the same circumference, a coil substrate for each phase forming a conductive pattern that crosses the magnetic flux generated by the field when the rotor rotates, and a coil substrate for each phase. A board for drawing out wiring for drawing out each end of the conductive pattern of each coil board for all phases to the outside, and a lamination of the coil board for each phase and one board for drawing out wiring. and a stator in which an integral number of sets are laminated.

Furthermore, a linear motor having a structure described in Patent Document 2 has been proposed. That is, a field magnetic pole in which a plurality of permanent magnets with different polarities are alternately arranged at an equal pitch on a field core, and an armature core and the core are arranged opposite to the field magnetic pole through a magnetic gap. and an armature winding formed by winding a coil in concentrated winding around the teeth of the armature, and one of the field magnetic pole and the armature is used as a stator and the other as a mover, relative to each other. Run.

Patent No. 6392252 Patent No. 5327701

In an electric motor whose main feature is an armature, it is necessary to further devise a configuration for generating a magnetic field in order to improve the space factor compared to electric wires.
An object of the present invention is to provide an electric motor whose space factor can be improved more than that of an electric wire.

The present invention completed with such an objective includes an armature that generates a magnetic field, and a magnetic pole piece that is movable relative to the armature, and the armature is movable relative to the magnetic pole piece. A plurality of magnetic field generating parts arranged around each of the plurality of iron cores arranged in the moving direction, and a first magnetic field generating part and a first magnetic field generating part in the same phase among the plurality of phases among the plurality of magnetic field generating parts. This electric motor has a plurality of connection parts that connect the two magnetic field generation parts and are arranged in a direction that intersects the movement direction.
Here, the plurality of connection parts may be stacked in a protruding direction of the iron core.
Further, the magnetic field generation section is configured by laminating conductive plate-like conductive members in the protruding direction in the number of the phases, each of which has a through hole through which the iron core passes, The connecting portion includes a first conductive member that is one of the plurality of conductive members in the first magnetic field generation portion and one of the plurality of conductive members in the second magnetic field generation portion. The layer that conducts electrically with the second conductive member may be different for each of the plurality of phases.
Further, the first conductive member, the second conductive member, and a conductive portion that connects the first conductive member and the second conductive member may be integrally configured.
Further, the first magnetic field generating section, the second magnetic field generating section, and a conductive section that connects the first magnetic field generating section and the second magnetic field generating section are integrally configured. Also good.
Further, the size of the first magnetic field generation section in the protrusion direction is T, the size of the conduction section in the protrusion direction is t, the size of the first magnetic field generation section in the moving direction is d, and When the magnitude of the movement direction between the first magnetic field generating section and the second magnetic field generating section is D, and when the number of current phases applied to the motor is N, then T/ t≧N and D/d≧N may be satisfied.
Further, the plurality of connecting portions may be arranged in a direction perpendicular to the protruding direction and the moving direction of the iron core.
Further, the connecting portion includes a straight linear portion, a first bent portion bent in a direction orthogonal to one end of the linear portion, and a first bent portion that is opposite to the first bent portion. a second bent part bent in a direction perpendicular to the other end of the shaped part; The connection part has a rectangular parallelepiped shape in which at least one of a first fitting part to be fitted and a second fitting part to which the second bending part is fitted is formed, and the connection part The first bent portion is fitted into the first fitting portion, and the second bent portion is fitted into the second fitting portion of the second magnetic field generation portion, so that the first magnetic field generation portion and the It may be electrically connected to the second magnetic field generating section.
Further, in the magnetic field generation section, a plurality of first fitting parts and a plurality of second fitting parts are formed in the orthogonal direction, and for each of the plurality of phases, a plurality of the first fitting parts arranged in the orthogonal direction are formed. The plurality of connecting portions may be fitted into different positions in the fitting portion and the second fitting portion.
The magnetic pole piece includes a plurality of magnetic pole blocks arranged in the moving direction and a plurality of magnetic pole blocks arranged in a direction crossing the moving direction, and the armature includes a plurality of magnetic pole blocks arranged in a plurality in a direction crossing the moving direction. It may also include a plurality of iron cores arranged in a plurality of arrays and shifted in the moving direction by the pole pitch of the magnetic pole block.
Further, the plurality of magnetic pole blocks arranged in a direction crossing the movement direction are arranged to be shifted in the movement direction, and the plurality of iron cores arranged in a direction crossing the movement direction are arranged at the pole pitch. In addition, the plurality of magnetic pole blocks may be arranged so as to be shifted by an amount of shift in the moving direction.

According to the present invention, in the armature, the connecting portions connecting the first magnetic field generating portion and the second magnetic field generating portion in the same phase among a plurality of phases are caused to interfere with each other in accordance with the number of phases. As a result, it is possible to provide an electric motor whose space factor can be improved more than that of electric wires.

1 is a diagram showing an example of a schematic configuration of a direct-acting motor. FIG. 3 is a diagram of the magnetic pole piece viewed from the armature side in the opposite direction. FIG. 3 is a perspective view showing an example of the configuration of a magnetic pole block. FIG. 2 is an example of a cross-sectional view of a magnetic pole piece taken along a plane perpendicular to the width direction. FIG. 1 is a perspective view showing an example of a schematic configuration of an armature according to a first embodiment. It is a perspective view showing an example of a schematic structure of a base material. FIG. 3 is an exploded view showing an example of a schematic configuration of a pair of U-phase conductive parts. FIG. 2 is an exploded view showing an example of a schematic configuration of a pair of V-phase conductive parts. FIG. 2 is an exploded view showing an example of a schematic configuration of a pair of W-phase conductive parts. FIG. 3 is a diagram showing the direction of a current flowing through a conductive part and the direction of a magnetic field. FIG. 3 is a diagram showing an example of a widthwise magnetic path generated from a conductive part. FIG. 3 is a diagram illustrating an example of a magnetic path in a moving direction generated from a conductive part. FIG. 2 is a diagram showing an example of a configuration applied to an axial gap motor. FIG. 2 is a diagram showing an example of a configuration applied to a radial gap motor. It is a figure which shows an example of the electrically conductive part based on 2nd Embodiment. (a) is a diagram of an example of a magnetic field generation section viewed in the opposite direction. (b) is a diagram of an example of a connecting portion viewed in the width direction. It is an example of the figure which cut the electrically conductive part in the plane orthogonal to a movement direction. It is a figure which shows an example of the electrically conductive part of the armature based on 3rd Embodiment. (a) is a sectional view of the section XIXa-XIXa in FIG. 18, (b) is a sectional view of the section XIXb-XIXb of FIG. 18, and (c) is a sectional view of the section XIXc-XIXc. . It is a figure showing an example of the armature concerning a 4th embodiment. It is a figure which shows an example of the 1st modification of an armature. It is a figure which shows an example of the 2nd modification of an armature. It is a figure which shows an example of the 3rd modification of an armature. It is a figure which shows an example of the 4th modification of an armature.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
<First embodiment>
FIG. 1 is a diagram showing an example of a schematic configuration of a direct-acting motor 1. As shown in FIG.
The linear motor 1 includes a magnetic pole piece 10 that moves in a linear direction, and an armature 20 that is arranged to face the magnetic pole piece 10.
In the following description, the direction in which the magnetic pole piece 10 moves may be referred to as a "moving direction." Further, the direction in which the magnetic pole piece 10 and the armature 20 face each other may be referred to as the "opposing direction". Further, a direction perpendicular to the moving direction and the facing direction of the magnetic pole piece 10 may be referred to as the "width direction".

(Magnetic pole piece 10)
FIG. 2 is a diagram of the magnetic pole piece 10 viewed from the armature 20 side in the opposite direction.
FIG. 3 is a perspective view showing an example of the configuration of the magnetic pole block 11.
The magnetic pole pieces 10 include one magnetic pole block 11 in the opposing direction, two in the width direction, and a large number (15 in this embodiment) in the moving direction, and a yoke 12 that accommodates the plurality of magnetic pole blocks 11. It has
The magnetic pole block 11 includes a rectangular parallelepiped soft magnetic iron core 111 and five plate-shaped iron cores that are provided so as to hide each of the five surfaces of the iron core 111 other than the surface facing the armature 20. It has a permanent magnet 112. Each permanent magnet 112 has a main surface 112a that is approximately the same size as one surface of the opposing iron core 111. Each permanent magnet 112 is arranged with the same magnetic pole facing the iron core 111.

One surface of the iron core 111 that is open so as to face the armature 20 becomes a mover magnetic pole 113. As will be described later, the movable magnetic pole 113 has the same magnetic pole as the magnetic pole of the main surface 112a of each permanent magnet 112 facing the iron core 111. Further, the outward facing surface of each permanent magnet 112 (the surface opposite to the main surface 112a) serves as a magnetic pole opposite to the movable element magnetic pole 113.

Adjacent magnetic pole blocks 11 are arranged so that their surfaces are in contact with each other. The movable element magnetic poles 113 of two adjacent magnetic pole blocks 11 are different from each other. That is, the magnetic pole blocks 11 are arranged so that the mover magnetic poles 113 are alternately reversed. Therefore, one of the contact surfaces of two adjacent magnetic pole blocks 11 becomes an S pole and the other becomes an N pole. Thereby, since two adjacent magnetic pole blocks 11 are attracted to each other by magnetic force, it is possible to easily arrange a plurality of magnetic pole blocks 11.

The yoke 12 is a bottomed, cylindrical member having a rectangular parallelepiped-shaped recess. The yoke 12 is made of soft magnetic material. The yoke 12 accommodates each magnetic pole block 11 so that the mover magnetic pole 113 is exposed to the outside and magnetic poles other than the mover magnetic pole 113 are not exposed to the outside. As a result, a magnetic path is formed within the yoke 12.

In the magnetic pole piece 10 configured as described above, the movable magnetic poles 113 of each magnetic pole block 11 face the armature 20 so as to be orthogonal to the opposing direction, and two of the four side faces face in the moving direction. , and the remaining two side surfaces face in a direction perpendicular to the width direction. As a result, the mover magnetic poles 113 are reversed one by one in each of the moving direction and the width direction.

FIG. 4 is an example of a cross-sectional view of the magnetic pole piece 10 taken along a plane perpendicular to the width direction.
In FIG. 4, the arrow indicates the magnetization direction, and the polarity is S→N. The iron core 111 is magnetized by a permanent magnet 112 surrounding it. Magnetic flux emitted from the permanent magnet 112 whose S pole faces the iron core 111 travels inside the iron core 111 . Since permanent magnets 112 are attached to five sides of the iron core 111, the magnetic flux emitted from each of these five permanent magnets 112 advances inside the iron core 111, and each magnetic flux faces toward the armature 20. It advances in the direction and exits from the mover magnetic pole 113 to the gap between it and the armature 20. This magnetic flux branches radially and enters the inside of the iron core 111 from the N-pole mover magnetic pole 113 of the adjacent magnetic pole block 11 (or the yoke 12 if the adjacent magnetic pole block 12 is the yoke 12). The magnetic flux from all the adjacent magnetic pole blocks 11 enters the N-pole mover magnetic pole 113 . Since the N pole of the permanent magnet 112 faces this iron core 111, the magnetic flux further travels inside this iron core 111, branches into both directions of movement and both directions of width, and enters permanent magnet 112. Magnetic flux advances from the permanent magnets 112 arranged on each of the five sides of the iron core 111 to the adjacent permanent magnets 112 (from the permanent magnet 112 adjacent to the yoke 12 to the yoke 12). Further, the magnetic flux emitted from the permanent magnet 112 arranged in the opposite direction to the iron core 111 travels through the yoke 12 and enters the permanent magnet 112 arranged in the opposite direction in the adjacent magnetic pole block 11 .

The movable magnetic pole 113 has the same polarity as the magnetic pole of the permanent magnet 112 facing the iron core 111 including the movable magnetic pole 113. In other words, when the S pole of the permanent magnet 112 faces the iron core 111, the mover magnetic pole 113 of the iron core 111 becomes the S pole, and when the N pole of the permanent magnet 112 faces the iron core 111, the iron core 111 The mover magnetic pole 113 becomes the north pole.

(Armature 20)
FIG. 5 is a perspective view showing an example of a schematic configuration of the armature 20 according to the first embodiment.
The armature 20 includes a base member 21 and a conductive part 220 built into the base member 21.
The base member 21 includes a flat plate-shaped yoke portion 211 and a plurality of iron cores 212 protruding from the yoke portion 211 in a rectangular parallelepiped shape. Although FIG. 5 shows an example in which two iron cores 212 are provided in the width direction and nine in the movement direction, the number is not particularly limited to these.
Further, in this embodiment, the phases are arranged in order from the left end in FIG. 5 as U phase, V phase, and W phase. Since the number of iron cores 212 in the moving direction is nine in total, three U-phase iron cores 212, three V-phase iron cores 212, and three W-phase iron cores 212 are provided. In addition, the phase order is the order of V phase, W phase, U phase, the order of W phase, U phase, V phase, the order of W phase, V phase, U phase, the order of V phase, U phase, W phase, The order may be U phase, W phase, and V phase.

The conductive portion 220 includes a pair of a U-phase conductive portion 220u, a V-phase conductive portion 220v, and a W-phase conductive portion 220w. The pair of U-phase conductive parts 220u, the pair of V-phase conductive parts 220v, and the pair of W-phase conductive parts 220w are each line-symmetrical in the width direction. In FIG. 5, among a pair of U-phase conductive parts 220u, a pair of V-phase conductive parts 220v, and a pair of W-phase conductive parts 220w, one of the U-phase conductive parts 220u and the V-phase conductive part 220v is shown. , shows a W-phase conductive portion 220w.

The U-phase conductive part 220u includes a magnetic field generating part 221u that is arranged around the iron core 212 and generates a magnetic field when a current flows, and a connecting part 222u that connects the adjacent magnetic field generating part 221u and the magnetic field generating part 221u. It has
The V-phase conductive section 220v includes a magnetic field generating section 221v that is arranged around the iron core 212 and generates a magnetic field when a current flows, and a connecting section 222v that connects the adjacent magnetic field generating section 221v and the magnetic field generating section 221v. It has
The W-phase conductive part 220w includes a magnetic field generating part 221w that is arranged around the iron core 212 and generates a magnetic field when a current flows, and a connecting part 222w that connects the adjacent magnetic field generating part 221w and the magnetic field generating part 221w. It has
In the following description, the magnetic field generating section 221u, the magnetic field generating section 221v, and the magnetic field generating section 221w may be collectively referred to as the "magnetic field generating section 221." Further, the connecting portion 222u, the connecting portion 222v, and the connecting portion 222w may be collectively referred to as the “connecting portion 222”.

FIG. 6 is a perspective view showing an example of a schematic configuration of the base material 30.
The conductive part 220 is configured by laminating base materials 30 that are conductive flat members. Note that in FIG. 6, the thickness of the base material 30 is omitted.
The base material 30 has a first base material 31 and a second base material 32. An example of the material of the base material 30 is copper.

The first base material 31 is a conductive flat plate having a rectangular outer shape and a rectangular through hole 311 formed inside.The first base material 31 is a conductive flat plate having a rectangular through hole 311 formed inside. A hole 312 is formed. The through hole 311 is formed to be slightly larger than the outer shape of the iron core 212. For example, the gap between the surface of the through hole 311 and the outer surface of the iron core 212 is 1 mm.

The second base material 32 has a plurality of base parts 321 having the same shape as the first base material 31, and has a plurality of conductive parts 322 that connect adjacent base parts 321 to each other. In this embodiment, since the base member 21 has three iron cores 212 for each phase, the second base member 32 has three base parts 321 and two conductive parts 322. ing.

The conductive part 220 is configured by laminating two first base materials 31 and one second base material 32. The U-phase conductive part 220u, the V-phase conductive part 220v, and the W-phase conductive part 220w each have different layers on which the second base material 32 is laminated. This will be explained in more detail below.

FIG. 7 is an exploded view showing an example of a schematic configuration of a pair of U-phase conductive parts 220u.
FIG. 8 is an exploded view showing an example of a schematic configuration of a pair of V-phase conductive parts 220v.
FIG. 9 is an exploded view showing an example of a schematic configuration of a pair of W-phase conductive parts 220w.
The U-phase conductive part 220u has the second base material 32 arranged on the first layer (hereinafter sometimes referred to as "first layer") closest to the yoke part 211 of the base member 21, and The first base material 31 is disposed on the second layer (hereinafter sometimes referred to as the "second layer") and the third layer (hereinafter sometimes referred to as the "third layer").

In the V-phase conductive section 220v, the first base material 31 is arranged in the first layer, the second base material 32 is arranged in the second layer, and the first base material 31 is arranged in the third layer.
In the W-phase conductive part 220w, the first base material 31 is arranged in the first layer and the second layer, and the second base material 32 is arranged in the third layer.

That is, the U-phase conductive part 220u is composed of a magnetic field generating part 221u formed by stacking three base materials 30, and a conductive part 322 of the second base material 32 arranged in the first layer. It has a connecting part 222u.
The V-phase conductive part 220v includes a magnetic field generating part 221v formed by stacking three base materials 30, and a connection part formed by a conductive part 322 of the second base material 32 arranged in the second layer. 222v.
The W-phase conductive part 220w includes a magnetic field generating part 221w formed by stacking three base materials 30, and a connection part formed by a conductive part 322 of the second base material 32 arranged in the third layer. 222w.

In the region where three base materials 30 are stacked, the base materials 30 to be stacked are electrically connected. Examples of methods for establishing electrical continuity include pasting tape on the base material 30, applying conductive paste, and applying solder plating.
Further, after the two first base materials 31 and one second base material 32 are laminated, an insulation treatment is performed. An example of the insulation treatment is immersing the two first base materials 31 and one second base material 32 in a stacked state in an insulation solution. Note that all parts other than the part where the power is input are insulated.

When assembling the U-phase conductive part 220u, the V-phase conductive part 220v, and the W-phase conductive part 220w to the base member 21, the connecting part 222u is first arranged in the first layer. Then, the U-phase conductive part 220u is assembled. After that, it is preferable to assemble the V-phase conductive part 220v with the connecting part 222v arranged on the second layer, and finally, assemble the W-phase conductive part 220w with the connecting part 222w arranged on the third layer. . As a result, the connection portion 222u of the U-phase conductive portion 220u, the connection portion 222v of the V-phase conductive portion 220v, and the connection portion 222w of the W-phase conductive portion 220w are stacked in order from the yoke portion 211 side of the base member 21. .

Although not shown in FIG. 1 and FIGS. 5 to 9, a pair of U-phase conductive parts 220u, a pair of V-phase conductive parts 220v, and a pair of W-phase conductive parts 220w are provided. Both ends of the two base materials 32 in the moving direction are each connected to a power source. An example of the connection mode is connecting both ends of the second base material 32 in the moving direction to the power source using electric wires. Further, for example, when viewed in the directions shown in FIGS. 7 to 9, a protrusion portion that protrudes further leftward from the top of the base 321 at the left end of the second base member 32 in the moving direction may be attached to the second base member 32. 32 (formed in a flat plate shape), and the protruding portion and the power source may be connected with an electric wire. Similarly, when viewed in the directions shown in FIGS. 7 to 9, the protrusion portion that protrudes further rightward from the top of the base 321 at the right end of the second base member 32 in the moving direction is connected to the second base member 32. The projecting portion may be integrally formed (formed in a flat plate shape), and the protruding portion and the power source may be connected with an electric wire.

(effect)
The linear motor 1 configured as described above operates as follows.
FIG. 10 is a diagram showing the direction of the current flowing through the conductive part 220 and the direction of the magnetic field. FIG. 10 is a diagram of the conductive portion 220 viewed from the magnetic pole piece 10 side in the opposite direction.
FIG. 11 is a diagram showing an example of a magnetic path in the width direction generated from the conductive portion 220.
FIG. 12 is a diagram showing an example of a magnetic path in the moving direction generated from the conductive part 220.
Depending on the moving direction and moving speed required of the magnetic pole piece 10, the direction and timing of the current flowing through the U-phase conductive portion 220u, the V-phase conductive portion 220v, and the W-phase conductive portion 220w are controlled. As shown in FIG. 10, a current in the same direction is passed through the pair of conductive parts 220 (for example, a pair of U-phase conductive parts 220u) in the moving direction.

For example, as shown in FIG. 10, a current is passed from left to right through a pair of U-phase conductive parts 220u. As a result, as shown in FIG. 11, magnetic paths are formed in opposite directions in the adjacent iron cores 212 in which the magnetic field generating parts 221u of the pair of U-phase conductive parts 220u are respectively arranged. Thereby, a magnetic path passing through these iron cores 212 and the yoke portion 211 is formed. At this time, the surface of the iron core 212 that faces the magnetic pole piece 10 becomes a magnetic pole (armature magnetic pole 213). Among the two iron cores 212 adjacent in the width direction, the armature magnetic pole 213 of one iron core 212 becomes an S pole, and the armature magnetic pole 213 of the other iron core 212 becomes an N pole.

FIG. 12 shows a case where currents in the opposite directions shown in FIG. 10 are passed through the U-phase conductive portion 220u and the V-phase conductive portion 220v. In the adjacent iron cores 212, the iron core 212 in which the magnetic field generating part 221u of the U-phase conductive part 220u is arranged, and the iron core 212 in which the magnetic field generating part 221v of the V-phase conducting part 220v is arranged, are arranged in opposite directions. A magnetic path is formed. Thereby, a magnetic path passing through these iron cores 212 and the yoke portion 211 is formed. Of the two iron cores 212 adjacent in the moving direction, the armature magnetic pole 213 of one iron core 212 becomes an S pole, and the armature magnetic pole 213 of the other iron core 212 becomes an N pole.

Therefore, when a current flows through the conductive portion 220, the armature magnetic pole 213 and the mover magnetic pole 113 are attracted or repelled by magnetic force.
FIG. 12 shows a magnetic path when the armature magnetic pole 213 and the mover magnetic pole 113 are attracted to each other.
By controlling the direction and timing of the current flowing through the U-phase conductive part 220u, the V-phase conductive part 220v, and the W-phase conductive part 220w, the moving direction and moving speed of the magnetic pole piece 10 are controlled. Ru.

The linear motor 1 configured as described above includes a magnetic pole piece 10 as an example of a movable movable part, and an armature 20 that faces the magnetic pole piece 10 and generates a magnetic field. The armature 20 includes a plurality of magnetic field generating sections 221 disposed around each of the plurality of iron cores 212 arranged in the moving direction of the magnetic pole piece 10, and a plurality of phases among the plurality of magnetic field generating sections 221. The first magnetic field generating section 221 (for example, magnetic field generating section 221u) and the second magnetic field generating section 221 (for example, magnetic field generating section 221u) in the same phase (for example, U phase, V phase, W phase) and a plurality of connecting portions 222 arranged in a direction intersecting the movement direction. The plurality of connection parts 222, ie, the connection part 222u, the connection part 222v, and the connection part 222w, are stacked in opposite directions, which is the direction in which the iron core 212 protrudes. With this configuration, a plurality of connection parts 222 can be provided without interfering with each other. This makes it possible to configure the conductive part 220 by laminating the conductive flat base materials 30 in order to eliminate the need for a coil winding process and improve the space factor compared to electric wires. .

The magnetic field generating part 221 is constructed by laminating base materials 30, which are an example of a conductive plate-shaped conductive member, in which a through hole 311 through which the iron core 212 is passed, in the number of phases in the protruding direction of the iron core 212. Consisted of. The plurality of connection parts 222 are connected to a base 321 of a second base material 32 as an example of a first conductive member which is one of the plurality of base materials 30 in the first magnetic field generation part 221, The layer that conducts electrically with the base 321 of the second base material 32, which is an example of a second conductive member that is one of the conductive members of the plurality of base materials 30 in the magnetic field generating section 221, has a plurality of phases (for example, U phase, V phase, W phase). By configuring the magnetic field generating section 221 by laminating the flat base materials 30, a coil winding process can be made unnecessary, and the space factor can be improved more than that of an electric wire. The armature 20 can have a simple configuration by making the layers that conduct the adjacent magnetic field generating parts 221 of the same phase different for each of the plurality of phases.

The base 321 that constitutes a part of the first magnetic field generation section 221, the base 321 that constitutes a part of the second magnetic field generation section 221 adjacent to the first magnetic field generation section 221, and the conductive section 322 are as follows: It is integrally constructed. Thereby, the conductive part 220 can be manufactured by laminating the first base material 31 and the second base material 32, so for example, after configuring the magnetic field generating part 221 only with the first base material 31, This configuration can be manufactured more easily than a configuration in which adjacent magnetic field generating units 221 are electrically connected to each other using electric wires or the like.

However, for example, after forming the magnetic field generating section 221 of the conductive section 220 using only the first base material 31, the adjacent magnetic field generating sections 221 may be electrically connected to each other using an electric wire or the like. In the case of such a configuration, there is no need to use two types of base materials 30, the first base material 31 and the second base material 32, so that component management can be facilitated.

In the conductive portion 220 according to the embodiment described above, the connection portion 222u of the U-phase conductive portion 220u is placed in the first layer, the connection portion 222v of the V-phase conductive portion 220v is placed in the second layer, and the W-phase conductive portion 220w is placed in the second layer. Although the connecting portion 222w is provided in the third layer, the present invention is not particularly limited to this embodiment. The connecting portion 222v of the V-phase conductive portion 220v may be in the first layer, the connecting portion 222w of the W-phase conductive portion 220w may be in the second layer, and the connecting portion 222u of the U-phase conductive portion 220u may be in the third layer. Furthermore, even if the connecting portion 222w of the W-phase conductive portion 220w is in the first layer, the connecting portion 222u of the U-phase conductive portion 220u is in the second layer, and the connecting portion 222v of the V-phase conductive portion 220v is in the third layer. good. Further, other layer orders may be used.

Further, the conductive part 220 is configured by laminating two first base materials 31 and one second base material 32. The thicknesses of the first base material 31 and the second base material 32 are not particularly limited. Further, although one base material 30 (the first base material 31 or the second base material 32) constitutes one layer, a plurality of base materials 30 may constitute one layer. For example, as the U-phase conductive part 220u, the first layer is made up of five second base materials 32, the second layer is made up of five first base materials 31, and the second layer is made up of five first base materials 31. The third layer may be formed by

Further, in the first embodiment described above, the conductive part 220 is applied to a so-called single-sided linear motor 1 in which one armature 20 faces one side of the movable magnetic pole piece 10. However, the conductive part 220 may be applied to a so-called double-sided type direct-acting motor in which the armature 20 faces both sides of the magnetic pole piece 10.

Further, in the first embodiment described above, the magnetic pole piece 10 is configured to be movable with respect to the armature 20, but the present invention is not particularly limited to this aspect. The armature 20 may be movable with respect to the magnetic pole piece 10. That is, the direct-acting motor 1 only needs to have the magnetic pole piece 10 and the armature 20 relatively movable.

Further, in the first embodiment described above, the configuration of the conductive part 220 in which the base material 30, which is a conductive plate-shaped member, is laminated is applied to the linear motion motor 1. For example, it may be applied to an axial gap motor or a radial gap motor.

FIG. 13 is a diagram showing an example of a configuration applied to an axial gap electric motor. FIG. 13 is a view seen in the axial direction of the rotating shaft from the side of the magnetic pole piece 10 disposed opposite the armature 23.
FIG. 13 shows an example in which the present invention is applied to a 3-slot, 4-pole axial gap motor.
The armature 23 includes a base member 24 and a conductive portion 320 built into the base member 24.
The base member 24 includes a yoke portion 241 and a plurality of iron cores 242 protruding from the yoke portion 241 in a cylindrical shape. Although FIG. 13 shows an example in which one iron core 242 is provided in the radial direction and 12 in the circumferential direction, the number is not particularly limited to these.
In the example shown in FIG. 13, the U phase, V phase, and W phase are arranged in clockwise order. Since the number of iron cores 242 in the circumferential direction is twelve in total, four U-phase iron cores 242, four V-phase iron cores 242, and four W-phase iron cores 242 are provided. In addition, the phase order is the order of V phase, W phase, U phase, the order of W phase, U phase, V phase, the order of W phase, V phase, U phase, the order of V phase, U phase, W phase, The order may be U phase, W phase, and V phase. Further, the shape of the iron core 242 may be a quadrangular prism or a triangular prism.

The conductive part 320 is configured by laminating base materials 40 that are conductive flat members.
The base material 40 has a first base material 41 and a second base material 42. An example of the material of the base material 40 is copper.
The first base material 41 is a conductive flat plate having a circular outer shape and a circular through hole 411 formed inside, and a communicating hole 412 that communicates the outside and the through hole 411 is formed. . The through hole 411 is formed to be slightly larger than the outer shape of the iron core 242. For example, the gap between the inner peripheral surface of the through hole 411 and the outer peripheral surface of the iron core 242 is 1 mm.

The second base material 42 has a plurality of base parts 461 having the same shape as the first base material 41, and also has a plurality of conductive parts 462 that connect adjacent base parts 461 to each other. The second base material 42 also includes a first connection end 463 that connects one end of one of the plurality of bases 461 to a power source, and a first connection end 463 that connects one end of one of the plurality of bases 461 to a power source, and a first connection end 463 that connects one end of one of the plurality of bases 461 to a power source It has a second connection end 464 that connects the other end of the power source to a power source. In the example shown in FIG. 13, since the base member 24 has four iron cores 242 for each phase, the second base material 42 has four base parts 461, three conductive parts 462, It has one first connection end 463 and one second connection end 464.

The conductive part 320 is configured by laminating two first base materials 41 and one second base material 42. The U-phase conductive part 320u, the V-phase conductive part 320v, and the W-phase conductive part 320w each have different layers on which the second base material 42 is laminated. This configuration is similar to that of the conductive section 220, so detailed explanation will be omitted.

FIG. 14 is a diagram showing an example of a configuration applied to a radial gap electric motor. FIG. 14 is a diagram seen in the axial direction of the rotating shaft. FIG. 14 shows an example in which the present invention is applied to a 3-slot, 4-pole radial gap motor.
In the radial gap electric motor, if the circumferential shape of the armature 26 corresponding to the armature 20 is developed, it will have the same shape as the armature 20 explained using FIGS. 5 to 9, so detailed explanation will be omitted. Let me explain the differences.

The armature 26 includes a base member 27 and a conductive portion 340 built into the base member 27.
The base member 27 includes a cylindrical yoke portion 271 and a plurality of iron cores 272 protruding from the yoke portion 271 in a rectangular parallelepiped shape. Two iron cores 272 are provided in the axial direction and 12 in the circumferential direction. However, the number of iron cores 272 is not particularly limited to these numbers.
In the example shown in FIG. 14, the U phase, V phase, and W phase are arranged in clockwise order. Since the number of iron cores 272 in the circumferential direction is twelve in total, four U-phase iron cores 272, four V-phase iron cores 272, and four W-phase iron cores 272 are provided. In addition, the phase order is the order of V phase, W phase, U phase, the order of W phase, U phase, V phase, the order of W phase, V phase, U phase, the order of V phase, U phase, W phase, The order may be U phase, W phase, and V phase.

The conductive part 340 is configured by laminating base materials 50 that are conductive flat members.
The base material 50 has a first base material 51 similar to the first base material 31 and a second base material 52 similar to the second base material 32. The second base material 52 has a plurality of base parts 521 having the same shape as the first base material 51, and has a plurality of conductive parts 522 that connect adjacent base parts 521 to each other. The second base material 52 also includes a first connection end 523 that connects one end of one of the plurality of bases 521 to a power source, and a first connection end 523 that connects one end of one of the plurality of bases 521 to a power source, and a first connection end 523 that connects one end of one of the plurality of bases 521 to a power source It has a second connection end 524 that connects the other end of the power source to a power source. In the example shown in FIG. 14, since the base member 27 has four iron cores 272 for each phase, the second base material 52 has four base parts 521, three conductive parts 522, It has one first connection end 523 and one second connection end 524. As shown in FIG. 14, the conductive portion 522 differs from the conductive portion 322 in that it is curved in an arc shape. In addition, in FIG. 14, the conductive portion 522 of the second base material 52 of the conductive portion 340 of the V phase and W phase is omitted in the U phase column, and the U phase and W phase column is omitted. The conductive portion 522 of the second base material 52 of the conductive portion 340 of the phase is omitted, and the conductive portion 522 of the second base material 52 of the conductive portion 340 of the U phase and V phase is omitted in the W phase column. It shows.

<Second embodiment>
FIG. 15 is a diagram showing an example of the conductive section 420 according to the second embodiment.
The conductive part 420 according to the second embodiment differs from the conductive part 220 according to the first embodiment in that connection parts 422 corresponding to the connection parts 222 are arranged in the width direction. Hereinafter, points different from the first embodiment will be explained. The same components are denoted by the same reference numerals in the first embodiment and the second embodiment, and detailed description thereof will be omitted.

The U-phase conductive part 420u includes a magnetic field generating part 421u that is arranged around the iron core 212 and generates a magnetic field when a current flows, and a connecting part 422u that connects the adjacent magnetic field generating part 421u and the magnetic field generating part 421u. It has
Similarly, the V-phase conductive section 420v includes a magnetic field generating section 421v and a connecting section 422v. Further, the W-phase conductive section 420w includes a magnetic field generating section 421w and a connecting section 422w.
The conductive portion 420 includes a pair of a U-phase conductive portion 420u, a V-phase conductive portion 420v, and a W-phase conductive portion 420w. The pair of U-phase conductive parts 420u, the pair of V-phase conductive parts 420v, and the pair of W-phase conductive parts 420w are each line-symmetrical in the width direction. In FIG. 15, among a pair of U-phase conductive parts 420u, a pair of V-phase conductive parts 420v, and a pair of W-phase conductive parts 420w, one of the U-phase conductive parts 420u and the V-phase conductive part 420v is shown. , shows a W-phase conductive portion 420w.

In the following description, the magnetic field generating section 421u, the magnetic field generating section 421v, and the magnetic field generating section 421w may be collectively referred to as the "magnetic field generating section 421." Further, the connecting portion 422u, the connecting portion 422v, and the connecting portion 422w may be collectively referred to as the “connecting portion 422”.

FIG. 16(a) is a diagram of an example of the magnetic field generation section 421 viewed in the opposing direction. FIG. 16(b) is a diagram of an example of the connecting portion 422 viewed in the width direction.
FIG. 17 is an example of a diagram in which the conductive portion 420 is cut along a plane perpendicular to the moving direction.
The magnetic field generating section 421 has a rectangular parallelepiped outer shape, and has a rectangular parallelepiped through hole 431 formed inside. Further, in the magnetic field generating section 421, a communication hole 432 that communicates the outside and the through hole 431 is formed in the center of the short side. The through hole 431 is formed to be slightly larger than the outer shape of the iron core 212. For example, the gap between the surface of the through hole 431 and the outer surface of the iron core 212 is 0.1 mm. However, the surface of the through hole 431 and the outer surface of the iron core 212 may be formed in contact with each other.

The magnetic field generating portion 421 also has a first insertion hole 433 into which a first bent portion 441 (described later) of the connecting portion 422 is inserted, and a second bent portion (described later) of the connecting portion 422 on both sides of the communicating hole 432. A second insertion hole 434 into which 442 is inserted is formed. Three first insertion holes 433 and three second insertion holes 434 are each formed in the width direction.
For example, the magnetic field generating section 421 is made of copper.

The connecting portion 422 includes a linear portion 440 that is linear, a first bent portion 441 that is bent in a direction orthogonal to one end of the linear portion 440, and a linear portion that is opposite to the first bent portion 441. A second bent part 442 is bent in a direction orthogonal to the other end of the part 440. The cross-sectional shape of the connecting portion 422 is rectangular. For example, the connecting portion 422 may be made of copper.

As shown in FIG. 15, the U-phase conductive part 420u is inserted into the outermost first insertion hole 433 in one magnetic field generation part 421u and the outermost second insertion hole 434 in the other magnetic field generation part 421u. The first bent portion 441 and the second bent portion 442 of the connecting portion 422u are respectively inserted.
The V-phase conductive part 420v connects the first insertion hole 433 in the center of one magnetic field generation part 421v and the second insertion hole 434 in the center of the other magnetic field generation part 421v through the first bend of the connection part 422v, respectively. It is configured by inserting the section 441 and the second bent section 442.
The W-phase conductive part 420w is inserted into the first insertion hole 433 at the innermost side (through hole 431 side) in one magnetic field generating part 421w and the second insertion hole 433 at the innermost side (through hole 431 side) in the other magnetic field generating part 421w. The first bent portion 441 and the second bent portion 442 of the connecting portion 422w are inserted into the hole 434, respectively.

As a result, the plurality of connecting portions 422 are arranged in an orthogonal direction that is orthogonal to the protruding direction (opposing direction) and the moving direction of the iron core 212. In this way, since the connecting portion 422u, the connecting portion 422v, and the connecting portion 422w are provided at different positions in the width direction, mutual interference between the connecting portion 422u, the connecting portion 422v, and the connecting portion 422w is suppressed.

As explained above, in the conductive part 420 according to the second embodiment, the magnetic field generating part 421 has the through hole 431 through which the iron core 212 passes, and the first bending part 441 of the connecting part 422 is fitted into the through hole 431. It has a rectangular parallelepiped shape in which at least one of a first insertion hole 433 as an example of a fitting part and a second insertion hole 434 as an example of a second fitting part into which the second bent part 442 is fitted is formed. In the connecting portion 422, the first bent portion 441 is fitted into the first insertion hole 433 in the first magnetic field generating portion 421, and the second bent portion 441 in the second magnetic field generating portion 421 adjacent to the first magnetic field generating portion 421 By fitting the second bent portion 442 into the insertion hole 434, the first magnetic field generating portion 421 and the second magnetic field generating portion 421 are electrically connected.

Thereby, the same magnetic field generating section 421u, magnetic field generating section 421v, and magnetic field generating section 421w can be used. Moreover, the same connection part 422u, connection part 422v, and connection part 422w can be used.
Furthermore, since the magnetic field generating section 421 has a rectangular cross-sectional shape taken along a plane perpendicular to the direction in which the current flows, the space factor can be increased compared to, for example, a structure formed by winding an electric wire. Further, when assembling, the magnetic field generating section 421 is simply fitted into the iron core 212, so there is no need to wind the electric wire.

A plurality of first insertion holes 433 and a second insertion hole 434 are formed in the magnetic field generation section 421 in the width direction (three in this embodiment), and are arranged for each of a plurality of phases (for example, U phase, V phase, and W phase). A position where a plurality of connection parts (in this embodiment, connection part 422u, connection part 422v, and connection part 422w) are fitted in among the plurality of first insertion holes 433 and second insertion holes 434 arranged in the width direction. are different. Thereby, it is possible to highly accurately prevent the connecting portion 422u, the connecting portion 422v, and the connecting portion 422w from interfering with each other.

In the conductive part 420 according to the embodiment described above, in the width direction from the outside to the inside, the connection part 422u of the U-phase conductive part 420u, the connection part 422v of the V-phase conductive part 420v, and the W-phase conductive part Although the connecting portions 422w of the 420w are arranged in sequence, the present invention is not particularly limited to this manner. The connection portion 422v of the V-phase conductive portion 420v, the connection portion 422w of the W-phase conductive portion 420w, and the connection portion 422u of the U-phase conductive portion 420u may be arranged in this order, or the connection portion of the W-phase conductive portion 420w may be 422w, the connection portion 422u of the U-phase conductive portion 420u, and the connection portion 422v of the V-phase conductive portion 420v. Moreover, other orders may be used.

Furthermore, in the conductive part 420 according to the embodiment described above, the first insertion hole 433 and the second insertion hole 434 into which the connection part 422u, the connection part 422v, and the connection part 422w are fitted are penetrating holes. The present invention is not limited to this embodiment. A recess may be formed so that the connecting portion 422u, the connecting portion 422v, and the connecting portion 422w can be fitted by a predetermined length.
Furthermore, although the magnetic field generating section 421 is formed into a rectangular parallelepiped shape, it is not particularly limited to this form. For example, the magnetic field generating section 421 may be configured by laminating a plurality of conductive flat members.

Further, although the first bent portion 441 and the second bent portion 442 of the connecting portion 422 according to the embodiment described above are bent in a direction perpendicular to the end of the linear portion 440, the present invention is not limited to this aspect. The first bending part 441 and the second bending part 442 are fitted into the first insertion hole 433 and the second insertion hole 434 formed in the magnetic field generation part 421, respectively, so that the adjacent magnetic field generation parts 421 are electrically connected to each other. If possible, the angle with respect to the linear portion 440 is not limited to orthogonal. Further, the shapes of the first bent portion 441 and the second bent portion 442 are not limited to a straight shape, and may be curved in whole or in part.

Further, the above-described conductive portion 420 may be applied to a so-called double-sided type direct-acting motor, or may be applied to an axial gap motor or a radial gap motor.

<Third embodiment>
FIG. 18 is a diagram showing an example of the conductive part 620 of the armature 60 according to the third embodiment.
A conductive part 620 according to the third embodiment differs from the conductive part 220 according to the first embodiment in that a magnetic field generating part 221 and a connecting part 222 are integrally molded. Hereinafter, points different from the first embodiment will be explained. The same reference numerals are used for the same parts in the first embodiment and the third embodiment, and detailed explanation thereof will be omitted.

The U-phase conductive section 620u has a magnetic field generating section 621u that corresponds to the magnetic field generating section 221u, and a connecting section 622u that corresponds to the connecting section 222u.
The V-phase conductive section 620v includes a magnetic field generating section 621v that corresponds to the magnetic field generating section 221v, and a connecting section 622v that corresponds to the connecting section 222v.
The W-phase conductive section 620w includes a magnetic field generating section 621w that corresponds to the magnetic field generating section 221w, and a connecting section 622w that corresponds to the connecting section 222w.

In the following description, the conductive portion 620u, the conductive portion 620v, and the conductive portion 620w may be collectively referred to as the “conductive portion 620”. Further, the magnetic field generating section 621u, the magnetic field generating section 621v, and the magnetic field generating section 621w may be collectively referred to as the "magnetic field generating section 621." Further, the connecting portion 622u, the connecting portion 622v, and the connecting portion 622w may be collectively referred to as the “connecting portion 622”.

In the U-phase conductive part 620u, the V-phase conductive part 620v, and the W-phase conductive part 620w, the magnetic field generating part 621u, the magnetic field generating part 621v, and the magnetic field generating part 621w have substantially the same shape, and the connecting part 622u and the connecting part 622v The difference is that the connecting portions 622w are offset from each other in the protruding direction (opposing direction) of the iron core 212.

19(a) is a sectional view of the section XIXa-XIXa in FIG. 18, FIG. 19(b) is a sectional view of the section XIXb-XIXb of FIG. FIG.
As shown in FIG. 19, the connection part 622u is arranged at the position closest to the yoke part 211 of the base member 21, the connection part 622w is arranged at the farthest position from the yoke part 211, and the connection part 622v is arranged at the center. The U-phase conductive portion 620u, the V-phase conductive portion 620v, and the W-phase conductive portion 620w are formed so as to be shaped.

It is noted that the U-phase conductive part 620u, the V-phase conductive part 620v, and the W-phase conductive part 620w are each formed by punching a conductive plate (for example, a irregularly shaped strip) with different thicknesses depending on the location. I can give an example.
When the plate thickness of the connecting part 622u, the connecting part 622v, and the connecting part 622w is t, and the plate thickness of the magnetic field generating part 621u, the magnetic field generating part 621v, and the magnetic field generating part 621w is T, when the motor is a three-phase AC motor. is set to T/t≧3. In other words, T/t is set to be equal to or greater than the number of phases of the applied current.

Further, the size of the magnetic field generating section 621 (for example, the magnetic field generating section 621u) in the moving direction is d (see FIG. 18), and the pitch between adjacent magnetic field generating sections 621 (for example, the magnetic field generating section 621u) in the moving direction is D (see FIG. 18). 18), in the case of a three-phase AC motor, D/d≧3 is set. In other words, D/d is set to be equal to or greater than the number of phases of the applied current.
Note that the method of manufacturing the U-phase conductive portion 620u, the V-phase conductive portion 620v, and the W-phase conductive portion 620w is not limited, and they may be formed by cutting.

When assembling the U-phase conductive part 620u, the V-phase conductive part 620v, and the W-phase conductive part 620w to the base member 21, first the U-phase conductive part 620u is assembled, and then the V-phase conductive part 620u is assembled. It is preferable to assemble the phase conductive part 620v, and finally, assemble the W-phase conductive part 620w. As a result, the connection portion 622u of the U-phase conductive portion 620u, the connection portion 622v of the V-phase conductive portion 620v, and the connection portion 622w of the W-phase conductive portion 620w are stacked in order from the yoke portion 211 side of the base member 21. .

In the conductive section 620 configured as above, the first magnetic field generating section 621 (for example, the magnetic field generating section 621u), the second magnetic field generating section 621 (for example, the magnetic field generating section 621u), and the first magnetic field generating section 621 (for example, the magnetic field generating section 621u), The connecting portion 622 (for example, the connecting portion 622u), which is an example of a conductive portion that connects the magnetic field generating portion 621 and the second magnetic field generating portion 621, is integrally configured. Therefore, the conductive part 620 can be easily assembled.
In addition, in the third embodiment described above, an example was shown in which the conductive part 620 in which the magnetic field generating part 621 and the connecting part 622 are integrally molded is applied to a direct-acting motor, but in addition, an axial gap motor It may also be applied to radial gap motors.

Further, in the third embodiment described above, an example is shown in which the conductive part 620 in which the magnetic field generating part 621 and the connecting part 622 are integrally formed is applied to a three-phase electric motor. but not limited to. For example, it may be applied to a two-phase electric motor. When applied to a two-phase electric motor, it is preferable to laminate a conductive part having the same shape as the U-phase conductive part 620u and a conductive part having the same shape as the W-phase conductive part 620w. Further, in such a case, when the plate thickness of the connecting portion 622 is t and the plate thickness of the magnetic field generating portion 621 is T, it is preferable to set T/t≧2. Furthermore, if the size of the magnetic field generating section 621 in the moving direction is d, and the pitch of the adjacent magnetic field generating sections 621 in the same phase in the moving direction is D, then in the case of a two-phase AC motor, D/d≧ It is recommended to set it to 2.

When applied to a motor with other plural phases, a two-phase case with a conductive part having the same shape as the U-phase conductive part 620u and a conductive part having the same shape as the W-phase conductive part 620w, It is preferable to appropriately combine a three-phase case of a U-phase conductive portion 620u, a V-phase conductive portion 620v, and a W-phase conductive portion 620w. For example, in the case of five phases, a conductive part having the same shape as the conductive part 620u of the U phase, a conductive part having the same shape as the conductive part 620w of the W phase, a conductive part 620u of the U phase, and a conductive part 620v of the V phase. , and the W-phase conductive portion 620w.

<Fourth embodiment>
FIG. 20 is a diagram showing an example of an armature 70 according to the fourth embodiment.
The conductive part 720 according to the fourth embodiment has a conductive part 720 arranged in the upper stage and a conductive part arranged in the lower stage in the conductive part 720 of the same phase with respect to the conductive part 220 according to the first embodiment. 720 are shifted in the moving direction by an odd multiple of the pole pitch, and the directions of current flowing through the conductive parts 720 arranged in the upper stage and the conductive parts 720 arranged in the lower stage are opposite directions. are different. Hereinafter, points different from the first embodiment will be explained. The same components are denoted by the same reference numerals in the first embodiment and the fourth embodiment, and detailed description thereof will be omitted.

More specifically, the armature 70 according to the fourth embodiment includes a base member 71 and a conductive portion 720 incorporated in the base member 71.
The base member 71 has a yoke portion 711 that corresponds to the yoke portion 211 and an iron core 712 that corresponds to the iron core 212. The iron core 712 is provided in two stages in the width direction, and includes an upper iron core 712a, which is the iron core 712 arranged in the upper tier, and a lower iron core 712b, which is the iron core 712 arranged in the lower tier. The upper iron core 712a and the lower iron core 712b are shifted from each other in the moving direction by the pole pitch P, in other words, the size of the magnetic pole block 11 in the moving direction.

The conductive portion 720 includes a U-phase conductive portion 720u, a V-phase conductive portion 720v, and a W-phase conductive portion 720w.
The conductive part 720 is configured by laminating a first base material 81 corresponding to the first base material 31 and a second base material 82 corresponding to the second base material 32.
In this embodiment, the first base material 81 is similar to the first base material 31, but the second base material 82 is different from the second base material 32.
The second base material 82 has a plurality of base parts 821 having the same shape as the first base material 81, and includes a first conductive part 822 that connects the base parts 821 adjacent to each other in the movement direction, and a plurality of base parts disposed in the upper stage. It has a second conductive part 823 that connects the base 821 disposed at the right end of the base 821 and the base 821 disposed at the right end of the plurality of bases 821 disposed at the lower stage. The second base material 82 also has an upper end 824 that protrudes leftward from the left end of the plurality of bases 821 arranged in the upper stage, and a left end of the plurality of bases 821 arranged in the lower stage. It has a lower end portion 825 that protrudes leftward from the disposed base portion 821. In this embodiment, since the base member 71 has six iron cores 712 for each phase, the second base material 82 has six base parts 821, four first conductive parts 822, It has one second conducting part 823, one upper end 824, and one lower end 825.

The linear motor having the conductive portion 720 according to the fourth embodiment configured as above operates as follows.
FIG. 20 also shows the direction of the current flowing through the conductive part 720 and the direction of the magnetic field. FIG. 20 is a diagram of the conductive portion 720 viewed from the magnetic pole piece 10 side in the opposite direction.
As shown in FIG. 20, a current is passed from left to right through the upper end portion 824 of the U-phase conductive portion 720u. As a result, as shown in FIG. 20, a current flows from right to left in the lower end portion 825 of the U-phase conductive portion 720u. Then, in the iron core 712 in which the magnetic field generating parts 721u of the U-phase conductive part 720u are arranged, magnetic paths are formed in the same direction, and the surface facing the magnetic pole piece 10 becomes the S pole. In addition, the iron core 712 in which the upper magnetic field generating part 721u of the U-phase conductive part 720u is arranged and the iron core 712 in which the lower magnetic field generating part 721u is arranged have a larger magnitude in the moving direction in the magnetic pole block 11. It's off by a minute.

FIG. 20 shows a case where currents in opposite directions flow through the U-phase conductive portion 720u and the V-phase conductive portion 720v. In other words, current is passed from left to right to the lower end 825 of the V-phase conductive section 720v. As a result, as shown in FIG. 20, a current flows from right to left in the upper end portion 824 of the V-phase conductive portion 720v. Then, in the iron core 712 in which the magnetic field generating parts 721v of the V-phase conductive part 720v are arranged, magnetic paths are formed in the same direction, and the surface facing the magnetic pole piece 10 becomes the north pole. In addition, the iron core 712 in which the upper magnetic field generating part 721v of the V-phase conductive part 720v is arranged and the iron core 712 in which the lower magnetic field generating part 721v is arranged have a large magnitude in the moving direction in the magnetic pole block 11. It's off by a minute.

On the other hand, in the magnetic pole block 10, adjacent magnetic pole blocks 11 in the movement direction and the width direction have different polarities.
Therefore, the N-pole magnetic pole block 11 is attracted to the position facing the iron core 712 where the magnetic field generating part 721u of the U-phase conductive part 720u, which becomes the S-pole, is arranged, and the V-phase conductive part 720v, which becomes the N-pole, is attracted. The S-pole magnetic pole block 11 is easily attracted to the position facing the iron core 712 where the magnetic field generating section 721v is arranged.

Here, for example, in the conductive part 220 according to the first embodiment, the right-most conductive part 220u of the plurality of conductive parts 220u arranged in the upper stage of the pair of U-phase conductive parts 220u, and the conductive part 220u arranged in the lower stage. When the rightmost conductive part 220u of the plurality of conductive parts 220u is connected and a current is passed from left to right to the upper conductive part 220u, the current flows from right to left to the lower conductive part 220u. flows. In other words, currents in opposite directions flow through the upper conductive section 220u and the lower conductive section 220u. Then, in the linear motor 1, magnetic paths are formed in the same direction in the iron core 212 in which the magnetic field generating parts 221u of the U-phase conductive part 220u are arranged, and the surface facing the magnetic pole piece 10 is the S pole. However, since the iron core 212 in which the upper magnetic field generation section 221u is disposed and the iron core 212 in which the lower magnetic field generation section 221u is disposed are at the same position in the moving direction, the driving force of the magnetic pole piece 10 cancels out. It will be done.

In contrast, in the present embodiment, the above configuration suppresses the driving forces of the magnetic pole piece 10 from being canceled out. Further, in the conductive part 220 according to the first embodiment, in order to cause current to flow in the same direction in the upper conductive part 220u and the lower conductive part 220u, the conductive part 220 is arranged, for example, at the right end of the plurality of base parts 321 arranged in the upper stage. The size of the second conductive part 823 is smaller compared to a configuration in which a conductive part is provided that connects the base 321 that is connected to the base 321 disposed at the left end of the plurality of bases 321 disposed at the lower stage. This makes it possible to achieve

(First modification)
FIG. 21 is a diagram showing an example of a first modification of the armature 70.
The amount by which the upper iron core 712a and the lower iron core 712b are shifted is determined by the amount by which the plurality of magnetic pole blocks 11 arranged in the upper stage and the plurality of magnetic pole blocks 11 arranged in the lower stage among the plurality of magnetic pole blocks 11 arranged in two stages in the width direction. It is preferable to change the offset amount δ in the case where the skew arrangement is performed in order to reduce the cogging torque.

FIG. 21 shows an example where the offset amount δ is 1/2 of the pole pitch P.
When the offset amount δ is 1/2 of the pole pitch P, the upper iron core 712a and the lower iron core 712b are moved in the moving direction as shown in FIG. It is better to shift it by /2. Thereby, it is possible to reduce the cogging torque while increasing the driving force of the magnetic pole piece 10.
Note that when the offset amount δ is equal to the thickness of the permanent magnet 112, it is preferable to shift the upper iron core 712a and the lower iron core 712b by a pole pitch P+ (thickness of the permanent magnet 112) in the moving direction.

(Second modification)
FIG. 22 is a diagram showing an example of a second modification of the armature 70.
An upper protruding part 712c that protrudes from the yoke part 711 in the same way as the upper iron core 712a is provided on the right side of the upper iron core 712a that has been arranged at the right end of the plurality of upper iron cores 712a arranged in the upper stage. In addition, a lower protruding portion 712d that protrudes from the yoke portion 711 in the same manner as the lower core 712b is provided on the left side of the lower core 712b that was disposed at the left end of the plurality of lower cores 712b disposed in the lower stage.

As a result, the magnetic flux generated by the magnetic field generating section 721w in the W-phase conductive section 720w at the right end of the upper stage passes through the yoke section 711, and cancels out the magnetic flux generated by the magnetic field generating section 721w at the right end W-phase conductive section 720w at the lower stage. This makes it possible to prevent this from happening. Furthermore, the magnetic flux generated by the magnetic field generating section 721u in the U-phase conductive section 720u at the left end of the upper row passes through the yoke section 711 and is canceled out by the magnetic flux generated by the magnetic field generating section 721u at the U-phase conductive section 720u at the left end of the lower row. This makes it possible to suppress the As a result, it becomes possible to further increase the driving force of the magnetic pole piece 10.

(Third modification)
FIG. 23 is a diagram showing an example of a third modification of the armature 70.
The difference is that the lower iron core 712b that was placed at the right end of the plurality of lower iron cores 712b arranged at the lower stage is removed, and a lower iron core 712b is newly provided to the left of the lower iron core 712b that was placed at the left end. Then, the magnetic field generating section 721w disposed at the right end of the lower magnetic field generating section 721w of the W-phase conductive section 720w is removed, and the magnetic field generating section 721w disposed at the left end of the lower magnetic field generating section 721w is removed. A magnetic field generating section 721w is newly provided on the left at a position corresponding to the newly provided lower core 712b.

As a result, the magnetic flux generated by the magnetic field generation section 721w in the W-phase conductive section 720w at the right end of the upper stage passes through the yoke section 711, and is canceled out by the magnetic flux generated by the magnetic field generation section 721w in the W-phase conductive section 720w at the lower stage. It becomes possible to suppress this. Further, the magnetic flux generated by the magnetic field generating section 721u in the U-phase conductive section 720u at the left end of the upper stage passes through the yoke section 711 and is canceled out by the magnetic flux generated by the magnetic field generating section 721u in the U-phase conductive section 720u at the lower stage. It becomes possible to suppress the

(Fourth modification)
FIG. 24 is a diagram showing an example of a fourth modification of the armature 70.
In the fourth modification, the shape of the conductive part 720 is different.
The rightmost magnetic field generating section 721 among the plurality of upper magnetic field generating sections 721 of the conductive section 720 of each phase and the rightmost magnetic field generating section 721 among the plurality of lower magnetic field generating sections 721 are arranged around the iron core 712. The difference is that the amount provided in the magnetic field generation section 721 is reduced, and the upper magnetic field generation section 721 and the lower magnetic field generation section 721 are connected.

More specifically, about half the circumference of the right end base 821 of the upper stage of the second base material 82 and about half the circumference of the right end base 821 of the lower stage, which constitute the conductive part 720 of each phase, are connected. It is used instead of the second conductive part 823 by making it conductive. The first base material 81 is not stacked on the right end base portions 821 of the upper and lower stages.
With such a configuration, it is possible to reduce the size of the conductive portion 720.

Note that in the conductive part 720 according to the fourth embodiment and its modification described using FIGS. 20 to 24, the first base material 81 and the second base material 82 are laminated. Similarly to the conductive part 620 according to the third embodiment, the magnetic field generating part 721 and the connecting part 722 may be integrally molded. Further, the conductive portion 720 according to the fourth embodiment and its modified example may be applied to an axial gap motor or a radial gap motor.

DESCRIPTION OF SYMBOLS 1... Direct motor, 10... Magnetic pole piece, 11... Magnetic pole block, 12... Yoke, 20, 23, 26, 60, 70... Armature, 21, 24, 27, 71... Base member, 30, 40, 50... Base material, 31, 41, 51, 81... First base material, 32, 42, 52, 82... Second base material, 111, 212, 242, 272, 712... Iron core, 112... Permanent magnet, 113... Mover Magnetic pole, 213... Armature magnetic pole, 220, 320, 340, 420, 620, 720... Conductive part, 221, 421, 621... Magnetic field generation part, 222, 422, 622... Connection part

Claims (8)

an armature that generates a magnetic field;
a magnetic pole movable relative to the armature;
Equipped with
The armature includes a plurality of magnetic field generating parts disposed around each of a plurality of iron cores arranged in a direction of movement relative to the magnetic pole piece, and a plurality of phases of the plurality of magnetic field generating parts. a plurality of connecting portions that connect the first magnetic field generating portion and the second magnetic field generating portion in the same phase of the magnetic field generating portion and are arranged in a direction intersecting the moving direction;
The plurality of connection parts are stacked in a protruding direction of the iron core,
The magnetic field generating section is configured by laminating a number of conductive plate-like conductive members in the protruding direction in the number of phases, each of which has a through hole through which the iron core passes, and
The plurality of connection parts are a first conductive member which is one of the plurality of conductive members in the first magnetic field generation part and one of the plurality of conductive members in the second magnetic field generation part. A layer that conducts electrically with a second conductive member that is one conductive member is different for each of the plurality of phases,
The first conductive member, the second conductive member, and the connection portion are in the same layer.
Electric motor. The electric motor according to claim 1 , wherein the first electrically conductive member, the second electrically conductive member, and a conductive portion that connects the first electrically conductive member and the second electrically conductive member are integrally configured. The first magnetic field generating section, the second magnetic field generating section, and a conductive section that connects the first magnetic field generating section and the second magnetic field generating section are integrally configured. 1. The electric motor according to 1 . T is the size of the first magnetic field generating part in the protruding direction, t is the size of the conducting part in the protruding direction, d is the size of the first magnetic field generating part in the moving direction, and d is the size of the first magnetic field generating part in the moving direction. When the magnitude of the movement direction between the magnetic field generating section and the second magnetic field generating section is D, and when the number of current phases applied to the motor is N, then
The electric motor according to claim 3 , wherein T/t≧N and D/d≧N. an armature that generates a magnetic field;
a magnetic pole movable relative to the armature;
Equipped with
The armature includes a plurality of magnetic field generating parts disposed around each of a plurality of iron cores arranged in a direction of movement relative to the magnetic pole piece, and a plurality of phases of the plurality of magnetic field generating parts. a plurality of connecting portions that connect the first magnetic field generating portion and the second magnetic field generating portion in the same phase of the magnetic field generating portion and are arranged in a direction intersecting the moving direction;
The plurality of connecting portions are arranged in a direction perpendicular to the protruding direction and the moving direction of the iron core,
The connecting portion includes a straight linear portion, a first bent portion bent in a direction orthogonal to one end of the linear portion, and a first bent portion that is opposite to the first bent portion. a second bent part bent in a direction perpendicular to the other end of the second bent part;
The magnetic field generating section includes at least one of a through hole through which the iron core passes, a first fitting section into which the first bending section of the connecting section is fitted, and a second fitting section into which the second bending section is fitted. It has a rectangular parallelepiped shape with one side formed,
In the connecting portion, the first bent portion is fitted into the first fitting portion of the first magnetic field generation portion, and the second bent portion is fitted into the second fitting portion of the second magnetic field generation portion. By being fitted, the first magnetic field generating section and the second magnetic field generating section are electrically connected .
Electric motor. A plurality of the first fitting portions and the second fitting portions are formed in the orthogonal direction in the magnetic field generating portion,
6. The electric motor according to claim 5 , wherein the positions at which the plurality of connecting portions are fitted, among the plurality of first fitting portions and the second fitting portions arranged in the orthogonal direction, are different for each of the plurality of phases. . The magnetic pole element includes a plurality of magnetic pole blocks arranged in a plurality in the moving direction and a plurality of magnetic pole blocks arranged in a plurality in a direction crossing the moving direction,
7. The armature according to claim 1, wherein the armature includes a plurality of iron cores arranged in a plurality in a direction intersecting the movement direction, and arranged in a plurality in a plurality arranged in a plurality of directions shifted by a pole pitch of the magnetic pole block in the movement direction. The electric motor according to any one of the items. The plurality of magnetic pole blocks arranged in a direction intersecting the moving direction are arranged so as to be shifted in the moving direction,
The plurality of iron cores arranged in a direction intersecting the moving direction are arranged so as to be shifted by an amount of deviation in the moving direction in the plurality of magnetic pole blocks in addition to the pole pitch . Electric motor.