WO2010058500A1 - 可動子、電機子及びリニアモータ - Google Patents

可動子、電機子及びリニアモータ Download PDF

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Publication number
WO2010058500A1
WO2010058500A1 PCT/JP2009/004060 JP2009004060W WO2010058500A1 WO 2010058500 A1 WO2010058500 A1 WO 2010058500A1 JP 2009004060 W JP2009004060 W JP 2009004060W WO 2010058500 A1 WO2010058500 A1 WO 2010058500A1
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WO
WIPO (PCT)
Prior art keywords
subunit
mover
opening
core
yoke
Prior art date
Application number
PCT/JP2009/004060
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
川上誠
Original Assignee
日立金属株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立金属株式会社 filed Critical 日立金属株式会社
Priority to JP2010520355A priority Critical patent/JP5434917B2/ja
Priority to EP09827282.6A priority patent/EP2360817B1/en
Priority to US13/129,861 priority patent/US8884473B2/en
Publication of WO2010058500A1 publication Critical patent/WO2010058500A1/ja

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2207/00—Specific aspects not provided for in the other groups of this subclass relating to arrangements for handling mechanical energy
    • H02K2207/03—Tubular motors, i.e. rotary motors mounted inside a tube, e.g. for blinds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings

Definitions

  • the present invention relates to a mover having a plurality of plate-shaped permanent magnets, an armature through which the mover passes, and a linear motor formed by combining these mover and armature (stator).
  • a permanent magnet structure having a large number of plate-like permanent magnets is used as a mover
  • an armature having a current-carrying coil is used as a stator
  • a structure in which the mover is passed through a stator has various types of linear motors.
  • JP 2002-27731 A JP 2005-287185 A JP 2005-295708 A
  • linear motors have a faster response than ball screws, but because the mass of the mover is large, sufficient thrust can be secured, but the required response speed cannot be achieved.
  • the structure of the linear motor suitable for speeding up is a movable magnet type.
  • the magnetic pole pitch is large, the amount of magnetic flux that wraps around the yoke on the back of the magnet increases, and the volume of the yoke increases and the mover becomes heavy.
  • the magnetic pole pitch is reduced, the armature side winding structure becomes complicated, and it becomes difficult to realize a smaller and higher output linear motor.
  • weight reduction is further desired.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a plate-like movable element that generates a large amount of magnetic flux and is lightweight.
  • Another object of the present invention is to provide an armature that does not have a complicated wire structure even when the magnetic pole pitch is small, and is less likely to cause magnetic saturation.
  • Still another object of the present invention is to provide a linear motor that has a structure in which magnetic saturation is unlikely to occur, can achieve high-speed response, and can increase the conversion efficiency of the motor to achieve high power density.
  • a first mover is a mover of a linear motor having a plurality of plate magnets, in which plate magnets and plate-like soft magnetic bodies are alternately stacked, and the plate magnets are stacked. It is characterized in that plate magnets magnetized in the longitudinal direction of the mover in the direction and plate magnets magnetized in the direction opposite to the longitudinal direction in the overlapping direction are alternately arranged.
  • a plate magnet magnetized in one direction of the overlapping direction (longitudinal direction), a soft magnetic material, a plate magnet magnetized in the other direction of the overlapping direction (longitudinal direction), soft It is composed of a magnetic material,.
  • the soft magnetic material inserted between two plate magnets whose magnetization directions differ from each other by 180 degrees has a function of changing the magnetic flux from the plate magnet in the thickness direction and is movable.
  • the magnetic circuit of the entire child is configured to generate magnetic flux in a direction perpendicular to the longitudinal direction (movement direction). Therefore, since this soft magnetic body acts as a return path of the magnetic flux, the magnetic flux leaking to the outside can be reduced.
  • the plate-like movable element of the present invention ensures a sufficient amount of magnetic flux even if it is lightweight.
  • the longitudinal direction of the mover means the moving direction of the mover
  • the width direction of the mover means the direction orthogonal to both the moving direction of the mover and the direction of the magnetic flux generated from the mover.
  • the thickness direction is a direction parallel to the direction of magnetic flux generated from the mover.
  • a first armature in an armature of a linear motor through which a plate-like mover passes, an opening through which the mover passes, and a yoke part arranged outside the opening, A first subunit made of a soft magnetic material having a core portion extending from the yoke portion in the thickness direction of the mover, an opening through which the mover passes, and an outer side of the opening And a plurality of cores of the first subunit, wherein the second subunits made of a soft magnetic material having a yoke portion and a core portion extending from the yoke portion in the width direction of the mover are alternately stacked. And / or a plurality of core portions of the second subunit are provided with a scribe line.
  • an opening through which the mover passes, a frame-shaped yoke disposed outside the opening, and a thickness extending from the yoke to the mover A first sub-unit having a core, an opening through which the mover passes, a frame-shaped yoke disposed outside the opening, and a core extending from the yoke in the width direction of the mover
  • the second subunits having the above are alternately stacked, and the winding lines are wound around the plurality of core portions of the first subunit and / or the plurality of core portions of the second subunit all together. Since the winding lines are collectively applied to the plurality of core portions of the subunits without separately forming the winding lines for each magnetic pole, the structure of the winding lines is simple and the size can be easily reduced.
  • the first armature according to the present invention is characterized in that the core portion of the second subunit is tapered from the middle toward the opening.
  • the core portion of the second subunit is tapered from the middle toward the opening, and the core portion of the first subunit and the core portion of the second subunit To reduce magnetic flux leakage. Also, since the yoke portion side of the core portion of the second subunit is not tapered and is wide, the magnetic flux passage toward the yoke portion is wide, so that magnetic saturation hardly occurs in that portion.
  • the first armature according to the present invention is characterized in that a soft magnetic spacer is sandwiched between the overlapping first subunit and second subunit so that the core portions do not contact each other. To do.
  • a frame-like spacer is provided between the first subunit and the second subunit. Therefore, non-contact (avoidance of magnetic short-circuit) between the core portion of the first subunit and the core portion of the second subunit is realized with a simple configuration.
  • plate magnets and plate-like soft magnetic bodies are alternately stacked, and the plate magnets are magnetized in the longitudinal direction of the mover in the stacking direction.
  • a movable element in which plate-like magnets magnetized in the direction opposite to the longitudinal direction of the overlapping direction are alternately arranged, a rectangular opening, a yoke disposed outside the opening, and the yoke
  • the second subunits made of a soft magnetic material having a core portion extending from the yoke portion in the width direction of the mover are alternately stacked, and the plurality of core portions of the first subunit and / or the first subunit are alternately stacked.
  • the first arm of the armature in which a plurality of core parts of two subunits are provided with a winding line Opening of the unit and
  • the first linear motor of the present invention has a configuration in which the movable element as described above is passed through the first armature as described above. Since the weight of the mover can be reduced, the response speed of the mover is increased. In addition, the wire structure in the armature is simple and the size can be reduced.
  • a second armature in an armature of a linear motor through which a plate-like mover passes, an opening through which the mover passes, a yoke part arranged outside the opening, A first subunit made of a soft magnetic material having a first core portion extending from the yoke portion to one side in the thickness direction of the mover and a second core portion extending in the width direction of the mover; And an opening through which the mover passes, a yoke disposed outside the opening, and a position symmetrical to the first core and the second core of the first subunit.
  • a second subunit made of a soft magnetic material having a first core portion and a second core portion extended from the portion, and a plurality of second of the first subunit and the second subunit.
  • an opening through which the mover passes a frame-shaped yoke part arranged outside the opening, and extending from the yoke part to one side in the thickness direction of the mover
  • a first subunit having a first core portion and a second core portion extending in the width direction of the mover, an opening through which the mover passes, and a frame-like shape disposed outside the opening
  • a yoke portion ; a first core portion extending from the yoke portion to the other side in the thickness direction of the mover; and a second core portion extending in the width direction of the mover.
  • the second subunits in point symmetry are alternately stacked, and a plurality of second core portions of the first subunit and the second subunit and / or a plurality of the first subunit and the second subunit.
  • a winding line is wound around the first core portion of the core.
  • the perforation line is applied to the plurality of core parts of the first subunit and the second sub-unit in a lump without individually perforating each magnetic pole, so the perforation structure is simple and the size can be easily reduced. is there.
  • the second core portion of the first subunit and the second subunit has a taper shape from the middle toward the opening, and the yoke portion side It is characterized by having a rib.
  • the second core portions of the first subunit and the second subunit are tapered from the middle toward the opening, and the second core portion and the second core portion
  • the overlap between the first subunit and the first subunit of the second subunit is reduced to reduce magnetic flux leakage.
  • a rib is provided on the yoke part side of the second core part of the first subunit and the second subunit. Therefore, since the magnetic flux path toward the yoke portion is wide, magnetic saturation hardly occurs in that portion.
  • the second armature according to the present invention includes a first core portion or a second core portion of the first subunit and the second subunit between the first subunit and the second subunit that overlap each other.
  • a spacer made of a soft magnetic material is interposed so as not to contact the first core portion or the second core portion.
  • a frame-like spacer is provided between the first subunit and the second subunit. Therefore, with a simple configuration, non-contact (avoidance of magnetic short-circuit) between the first core portion and the second core portion of the first subunit and the first core portion and the second core portion of the second subunit is realized.
  • the second linear motor according to the present invention has a plurality of plate magnets magnetized in the thickness direction, and the plate magnet is magnetized in one direction of the thickness direction and the thickness direction.
  • a movable element in which plate-like magnets magnetized in a direction opposite to the one direction are arranged in a rectangular shape, a yoke part arranged outside the opening part, and a yoke part
  • a first subunit made of a soft magnetic material having a first core portion extending in one thickness direction of the mover and a second core portion extending in the width direction of the mover; and a rectangular shape
  • the first opening is provided at a position symmetrical to the first core portion and the second core portion of the first subunit, and extends from the yoke portion.
  • a second subunit made of a soft magnetic material having a core portion and a second core portion is alternately stacked, and the first sub The first subunit of the armature, wherein a plurality of second core portions of the unit and the second subunit and / or a plurality of first core portions of the first subunit and the second subunit are provided with a winding line And an opening of the second subunit.
  • the second linear motor of the present invention a mover in which plate magnets magnetized in one direction in the thickness direction and plate magnets magnetized in the other direction in the thickness direction are alternately arranged,
  • the second armature as described above is penetrated. Since the weight of the mover can be reduced, the response speed of the mover is increased.
  • the wire structure in the armature is simple and the size can be reduced.
  • the second mover according to the present invention is a linear motor mover having a plurality of plate magnets, and each of the plurality of plate magnets magnetized in the thickness direction is made of a non-magnetic rectangular magnet holding spacer.
  • plate magnets magnetized in one direction of the thickness direction and plate magnets magnetized in the direction opposite to the one direction of the thickness direction alternately
  • the linear guide rail is provided in the frame body which is arrange
  • each of the plurality of plate magnets is bonded and held in each of the plurality of holes formed side by side in the magnet holding spacer made of non-magnetic material, on both sides in the width direction of the magnet holding spacer.
  • a linear guide rail is provided extending in the longitudinal direction. Therefore, since the mover can be pressed from the side with this linear guide rail, the mechanical strength of the mover is increased, and flexural vibration, resonance vibration, etc. can be suppressed, and high-speed linear motion without rattling is possible. Become.
  • the second mover according to the present invention is characterized in that the longitudinal direction of the plate magnet is skewed from the facing direction of the linear guide rail.
  • the longitudinal direction of the plate magnet is skewed by a predetermined angle from the facing direction of the linear guide rail. Therefore, when the mover is moved at a constant speed, the jerky movement (cogging) can be reduced.
  • a third armature of the present invention in the armature of the linear motor through which the plate-like mover passes, an opening through which the mover passes, and a yoke part arranged outside the opening, A first subunit made of a soft magnetic material having a core portion extending from the yoke portion to one side in the thickness direction of the mover, an opening through which the mover passes, and an outer side of the opening And a soft core having an auxiliary core portion extending from the yoke portion to one side in the thickness direction of the mover, and a core portion extending from the yoke portion to the other side in the thickness direction of the mover.
  • a fourth subunit made of a soft magnetic material having a core portion extending to the other side is stacked in this order, an opening through which the mover passes, a yoke portion disposed outside the opening,
  • the core portion of the first subunit, the auxiliary core portion of the second subunit, 3rd sub are collectively provided with a winding line, and the core portion of the second subunit and the auxiliary of the third subunit.
  • the core portion, the core portion of the fourth subunit, and the auxiliary core portion on the other side in the thickness direction of the mover of the spacer unit are collectively provided with a winding line.
  • the first subunit, the spacer unit, the second subunit, the spacer unit, the third subunit, the spacer unit, and the fourth subunit configured as described above are provided. They are stacked in this order, and the core part of the first subunit, the auxiliary core part of the second subunit, the core part of the third subunit, and the auxiliary core part on one side in the thickness direction of the mover of each spacer unit, The second subunit core part, the third subunit auxiliary core part, the fourth subunit core part, and the auxiliary core part on the other side in the thickness direction of the mover of each spacer unit are rolled together. The wire is wound.
  • the winding lines are applied in a lump instead of individually for each magnetic pole, the structure of the winding lines is simple and downsizing is easy. Moreover, since the 1st subunit and 4th subunit which one side of both the winding lines are not wound are arrange
  • the first subunit, the second subunit, the third subunit, the fourth subunit, and the spacer unit are the same in the thickness direction of the mover. It is divided by position.
  • the first to fourth subunits and the spacer unit are divided in the thickness direction. Therefore, it is possible to apply a winding line in a divided state, the winding process is easy, and an armature can be easily manufactured.
  • each of a plurality of plate magnets magnetized in the thickness direction has a thickness in each of a plurality of holes formed in parallel with a rectangular magnet holding spacer made of a non-magnetic material.
  • Plate magnets magnetized in one direction of the direction and plate magnets magnetized in the direction opposite to the one direction of the thickness direction are alternately arranged on both sides of the magnet holding spacer in the width direction.
  • a movable element having a linear guide rail provided on a frame extending in the longitudinal direction includes a rectangular opening, a yoke part arranged outside the opening, and a thickness direction of the movable element from the yoke part.
  • the first subunit made of a soft magnetic material having a core portion extended, a rectangular opening, a yoke portion arranged outside the opening, and one side in the thickness direction of the mover from the yoke portion
  • a spacer unit made of a magnetic material is connected to the first subunit and the second subunit.
  • the opening of the first subunit, the opening of the second subunit, the opening of the third subunit, the opening of the fourth subunit, and the spacer unit is characterized by being penetrated through the opening of the base plate.
  • the third linear motor of the present invention has a configuration in which the second armature as described above is passed through the third armature as described above. Since the weight of the mover can be reduced, the response speed of the mover is increased. In addition, the wire structure in the armature is simple and the size can be reduced. Also, since the circumference of each linear guide rail has the same polarity, even if magnetic linear guide rails are used, magnetic flux does not leak in the direction of the linear guide rails, resulting in a reduction in thrust. Absent.
  • the coils of the armature can be integrated, which is effective for space saving of the coil. There is a problem that the maximum thrust is reduced due to the large amount of magnetic flux.
  • the armature coils can be integrated into one package, and the leakage magnetic flux from the core portion is also small, so that the thrust is not reduced and the linear motor can be reduced in size and increased in output. There is an effect that it is possible to provide a linear motor that can achieve high efficiency and high thrust even with a small configuration.
  • FIG. 15 is a plan view showing a division pattern of first to fourth subunits and spacer units of an armature according to a modification of the third embodiment.
  • FIG. 1 is a plan view illustrating a configuration of a linear motor according to Embodiment 1.
  • FIG. 4 is a graph showing measurement results of thrust characteristics in the linear motor according to Example 1.
  • 6 is a plan view showing an armature material used for manufacturing an armature according to Example 2.
  • FIG. 6 is a plan view illustrating a configuration of a linear motor according to Embodiment 2.
  • 6 is a graph showing measurement results of thrust characteristics in a linear motor according to Example 2.
  • 6 is a plan view showing an armature material used for manufacturing an armature according to Example 3.
  • FIG. 6 is a plan view showing an armature material used for manufacturing an armature according to Example 3.
  • FIG. 6 is a plan view showing an armature material used for manufacturing an armature according to Example 3.
  • FIG. 6 is a plan view and a cross-sectional view illustrating a configuration of a linear motor according to a third embodiment.
  • 10 is a graph showing measurement results of thrust characteristics in a linear motor according to Example 3.
  • 10 is a graph showing measurement results of thrust characteristics in a linear motor according to Example 3.
  • FIG. 1 is a perspective view showing the configuration of the mover according to the first embodiment.
  • the mover 1 of the first embodiment has a configuration in which two types of flat magnets 2a and 2b and a flat soft magnetic body 3 are combined.
  • the flat magnet 2a, the soft magnetic body 3, and the flat magnet 2b and soft magnetic bodies 3,... are alternately bonded in this order.
  • white arrows indicate the magnetization directions of the flat magnets 2a and 2b.
  • the flat magnets 2a and 2b are both magnetized in the overlapping direction, that is, the moving direction of the mover 1 (longitudinal direction of the mover 1), but their magnetization directions are opposite to each other by 180 degrees.
  • a flat soft magnetic body 3 is inserted between the adjacent flat magnets 2a and 2b.
  • the soft magnetic body 3 plays a role of changing the direction of the magnetic flux from the flat magnets 2 a and 2 b in the thickness direction of the mover 1.
  • the movable element 1 has a magnetic circuit configuration that generates magnetic flux in a direction perpendicular to the longitudinal direction (movement direction).
  • FIGS. 2A to 2D are perspective views showing the configuration of the armature according to the first embodiment
  • FIGS. 2A to 2C are partial configuration diagrams thereof
  • FIG. 2D is an overall configuration diagram thereof.
  • the armature 4 has a configuration in which the first subunits 5 shown in FIG. 2A and the second subunits 6 shown in FIG. 2B are alternately arranged (see FIG. 2C).
  • the first subunit 5 is made of a soft magnetic material, and has an opening 5a through which the mover 1 passes, a yoke 5b serving as a frame disposed outside the opening 5a, and a yoke 5b.
  • the two core portions 5c, 5c have the same rectangular shape in plan view, and are provided at positions separated by 180 degrees with the opening 5a as the center.
  • the second subunit 6 is made of a soft magnetic material, and has an opening 6a through which the mover 1 passes, a yoke portion 6b as a frame disposed outside the opening 6a, and a yoke. It has two core parts 6c and 6c extended from the part 6b in the width direction of the needle
  • Each of the core portions 6c and 6c has a rectangular shape in which the base end portion on the yoke portion 6b side has a rectangular shape in plan view, and the tip end portion on the opening portion 6a side has a tapered shape that becomes narrower toward the center in plan view.
  • the tip portions of both core portions 6c, 6c are connected to each other.
  • first subunits 5 and second subunits 6 are alternately arranged and overlapped as shown in FIG. 2C.
  • the yoke portion 5b and the yoke portion 6b are in contact with each other, but the core portion 5c and the core portion 6c are not in contact with each other. There is a gap between them to avoid magnetic shorts.
  • Winding the winding wire 8a and penetrating through the common gap portions 7c and 7d of the first subunit 5 and the second subunit 6 and the other core portion 6c of the second subunit 6 (FIG. 2B, C Winding wire 8b is collectively wound around the left core portion 6c).
  • the two wire lines 8a and 8b are connected so that the energization directions of the wire 8a and the wire 8b are reversed (see FIG. 2D).
  • the white arrows in FIG. 2D indicate the energization directions on the winding lines 8a and 8b.
  • FIG. 3 is a perspective view showing the configuration of the linear motor 10 according to the first embodiment.
  • the armature 4 functions as a stator. Then, by applying a current in the reverse direction to the winding wires 8a and 8b, the mover 1 penetrating through the hollow portion 9 of the armature 4 performs a reciprocating linear motion with respect to the armature 4 (stator).
  • FIG. 4 is a cross-sectional view showing an energized state and a magnetomotive force in the armature 4 of the first embodiment.
  • “ ⁇ (flow from the back of the paper to the front)” and “ ⁇ (flow from the front to the back of the paper)” indicate the flow directions to the winding lines 8 a and 8 b.
  • the white arrow indicates the direction of the magnetomotive force applied to the core portions 5c and 6c by energization of the coil.
  • a magnetic field is generated in all the core portions 5c and 6c of the first subunit 5 and the second subunit 6 by applying a reverse current to the winding wire 8a and the winding wire 8b.
  • each subunit when the thickness of the core portion is made thinner than the thickness of the yoke portion so that both subunits are overlapped, the core portions of both subunits are not in contact with each other.
  • a spacer unit 11 made of a soft magnetic material consisting only of a frame-shaped yoke as shown in FIG. 5 between adjacent subunits the entire thickness of each subunit is made uniform. Also, it can be configured so that the core portions of both subunits do not contact each other.
  • the first subunit 5, the spacer unit 11, the second subunit 6, the spacer unit 11, In the armature 4 having such a configuration, the first subunit 5, the spacer unit 11, the second subunit 6, the spacer unit 11,.
  • the mover in the first embodiment as described above has a large amount of magnetic flux and is lightweight even if it is plate-shaped.
  • the armature according to the first embodiment does not have a complicated wire structure even when the magnetic pole pitch is small, and is less likely to become magnetically saturated.
  • the linear motor in the first embodiment has a structure that hardly causes magnetic saturation, high-speed response can be realized, and the conversion efficiency of the motor can be increased to achieve a small size and high output.
  • the core portion 6c of the second subunit 6 of the first embodiment is tapered from the middle toward the opening 6a because the core portion 5c of the first subunit 5 and the second subunit 6 are tapered. This is to reduce the area of the portion facing the core portion 6c. Since the first sub-unit 5 and the second sub-unit 6 are energized through common winding lines 8a and 8b, the polarity of the opening 5a and the polarity of the opening 6a are reversed as shown in FIG. . Therefore, since the leakage magnetic flux (total magnetic flux) that does not contribute to the output generated in the air layer is proportional to the facing area of the core portion, the leakage of magnetic flux from the core portion 5c to the core portion 6c should be reduced. The facing area between the core part 5c and the core part 6c is reduced.
  • the width of the base end portion on the yoke portion 6b side of the core portion 6c of the second subunit 6 is kept wide to suppress the occurrence of magnetic saturation in this portion.
  • the taper to form may be curvilinear.
  • gap part (notch part) in the 2nd subunit 6 was made into V shape as shown to FIG. 2B, other shapes, such as U shape, may be sufficient.
  • the winding lines 8a and 8b are collectively applied to the core portion 6c of the second subunit 6.
  • the winding lines are collectively applied to the core portion 5c of the first subunit 5. You may make it give. Moreover, you may make it give a winding line to both the core part 5c of the 1st subunit 5, and the core part 6c of the 2nd subunit 6. FIG.
  • a total of 10 flat magnets 2a, 2b and 10 soft magnetic bodies 3 are sequentially stacked one by one, but this is only an example.
  • the number may be any number.
  • two sets of the first subunit 5 and the second subunit 6 are alternately arranged, this is an example, and the number of sets may be an arbitrary number.
  • a single-phase linear motor (unit for one phase) has been described.
  • the above-described three armatures are set to a magnetic pole pitch ⁇ (n + 1/3) or
  • the magnetic pole pitch ⁇ (n + 2/3) (where n is an integer) may be arranged linearly at intervals, and the mover may be passed through them.
  • the integer n may be set in consideration of the space in which the line is accommodated.
  • FIG. 6 is a perspective view showing the configuration of the mover according to the second embodiment.
  • the mover 21 of the second embodiment has a configuration in which two types of flat magnets 22a and 22b are alternately combined.
  • white arrows indicate the magnetization directions of the flat magnets 22a and 22b.
  • the flat magnets 22a and 22b are both magnetized in the thickness direction, but their magnetization directions are opposite to each other by 180 degrees.
  • a spacer (not shown) is inserted between the adjacent flat magnets 22a and 22b.
  • FIGS. 7A to 7D are perspective views showing the configuration of the armature according to the second embodiment, in which FIGS. 7A to 7C are partial configuration diagrams thereof, and FIG. 7D is an overall configuration diagram thereof.
  • the armature 24 has a configuration in which the first subunits 25 shown in FIG. 7A and the second subunits 26 shown in FIG. 7B are alternately arranged (see FIG. 7C).
  • the first subunit 25 is made of a soft magnetic material, and has an opening 25a through which the movable element 21 penetrates, a yoke part 25b as a frame disposed outside the opening 25a, and a yoke part 25b.
  • the first core portion 25c extending in the thickness direction of the mover 21 from one side in the longitudinal direction, and the second core portions 25d and 25d extending in the width direction of the mover 21 from both sides in the width direction of the yoke portion 25b. And have.
  • the first core portion 25c has a rectangular shape in plan view.
  • Each of the second core portions 25d and 25d has a trapezoidal shape in a plan view in which the base end portion on the yoke portion 25b side has a rib 25e, and the tip end portion on the opening portion 25a side becomes narrower toward the center in the plan view. It has a trapezoidal shape that is tapered, and the tip portions of the second core portions 25d and 25d are connected to each other.
  • the second subunit 26 is formed of a soft magnetic material, and includes an opening 26a through which the movable element 21 passes, a yoke 26b as a frame disposed outside the opening 26a, and a yoke.
  • a first core portion 26c extending in the thickness direction of the mover 21 from one longitudinal direction side of the portion 26b, and a rib 26e extending in the width direction of the mover 21 from both sides in the width direction of the yoke portion 26b. 2 core portions 26d and 26d.
  • the second subunit 26 has a configuration in which the first subunit 25 is rotated 180 degrees, in other words, a configuration in which the top and bottom of the first subunit 25 are inverted.
  • the opening 26a, the yoke portion 26b, the first core The shape of the portion 26c and the second core portions 26d and 26d in plan view is a shape obtained by rotating the opening 25a, the yoke portion 25b, the first core portion 25c, and the second core portions 25d and 25d of the first subunit 25 by 180 degrees. It is.
  • the thickness of the core part is made thinner than the thickness of the yoke part in each of the first subunit 25 and the second subunit 26 and the both subunits 25 and 26 are overlapped, The core parts are prevented from contacting each other. Then, such first subunits 25 and second subunits 26 are alternately arranged and overlapped as shown in FIG. 7C.
  • the yoke portion 25b and the yoke portion 26b are in contact with each other, but the first core portion 25c, the second core portion 25d, and the first subunit
  • the core portion 26c and the second core portion 26d are not in contact with each other, and a gap exists between them to avoid a magnetic short circuit.
  • 26d (the second core portion 25d and the second core portion 26d on the right side of FIGS. 7A and 7B) are wound together with the winding wire 28a and a common gap between the first subunit 25 and the second subunit 26
  • the other second core portion 25d in the first subunit 25 and the other second core portion 26d in the second subunit 26 through the portions 27c and 27d (the second core portion 25d on the left side of FIGS.
  • the winding wire 28b is wound around the two core portions 26d).
  • Both the winding lines 28a and 28b are connected so that the energization directions of the winding lines 28a and 28b are reversed (see FIG. 7D).
  • White arrows in FIG. 7D indicate energization directions on the winding lines 28a and 28b.
  • FIG. 8 is a perspective view showing the configuration of the linear motor 30 according to the second embodiment.
  • the armature 24 functions as a stator. Then, by applying a current in the reverse direction to the winding wires 28a and 28b, the mover 21 penetrating through the hollow portion 29 of the armature 24 performs a reciprocating linear motion with respect to the armature 24 (stator).
  • FIGS. 9A and 9B are cross-sectional views showing the energized state and magnetomotive force in the armature 24 (first subunit 25, second subunit 26) of the second embodiment.
  • 9A and 9B “ ⁇ (flow from the back of the paper to the front)” and “ ⁇ (flow from the front to the back of the paper)” indicate the flow directions to the winding lines 28a and 28b.
  • the white arrow indicates the direction of the magnetomotive force applied to the first core portions 25c and 26c and the second core portions 25d and 26d by energization of the coil.
  • both subunits when the thickness of the core portion is made thinner than the thickness of the yoke portion so that both subunits are overlapped, the core portions of both subunits are not in contact with each other.
  • a spacer unit 31 consisting of only a frame-shaped yoke as shown in FIG. 10 between both adjacent subunits, both subunits can be made uniform in thickness. It can be configured so that the core portions of the two do not contact each other.
  • the first subunit 25 the spacer unit 31, the second subunit 26, the spacer unit 31,.
  • the mover in the second embodiment as described above has a large amount of magnetic flux and is lightweight even if it is plate-shaped.
  • the armature according to the second embodiment does not have a complicated wire structure even when the magnetic pole pitch is small, and is less likely to become magnetically saturated.
  • the linear motor in the second embodiment has a structure that hardly causes magnetic saturation, high-speed response can be realized, and the conversion efficiency of the motor can be increased to achieve a small size and high output.
  • the second core portion 25d of the first subunit 25 and the second core portion 26d of the second subunit 26 in the second embodiment are tapered, so that the second core portion 25d of the first subunit 25 is tapered.
  • the first core portion 26c of the second subunit 26, the second core portion 26d of the second subunit 26, and the first core portion 25c of the first subunit 25 are opposed to each other. is there. Since the leakage magnetic flux (total magnetic flux) that does not contribute to the output generated in the air layer is proportional to the facing area of the core portion, leakage of magnetic flux from the first core portion 25c, 26c to the second core portion 25d, 26d ( In order to reduce (slip), the area of the facing portion is reduced.
  • ribs 25e and 26e are provided at the base ends of the second core portions 25d and 26d on the yoke portions 25b and 26b side. This is because when the width of this portion is narrow, the magnetic flux passage from the first core portions 25c and 26c toward the yoke portions 25b and 26b becomes narrow and magnetic saturation is likely to occur.
  • the ribs 25e and 26e are provided to suppress the occurrence of magnetic saturation in this portion.
  • the taper to form may be curvilinear.
  • gap part (notch part) in the 1st subunit 25 and the 2nd subunit 26 was made into V shape as shown to FIG. 7A and B, other shapes, such as U shape, are used. It may be. Further, the shapes of the ribs 25e and 26e are not limited to those illustrated.
  • the tear lines 28a and 28b are collectively applied to the second core portions 25d and 26d of the first and second subunits 25 and 26.
  • the first core portion 25c and the first core portion 26c of the second subunit 26 may be collectively bundled.
  • the first core portions 25c and 26c and the second core portions 25d and 26d may be both marked.
  • a total of ten flat magnets 22a and 22b are sequentially stacked one by one, but this is only an example, and the number thereof may be any number.
  • two sets of the first subunit 25 and the second subunit 26 are alternately arranged, this is an example, and the number of sets may be an arbitrary number.
  • a single-phase linear motor (unit for one phase) has been described.
  • the above-described three armatures are set to a magnetic pole pitch ⁇ (n + 1/3) or
  • the magnetic pole pitch ⁇ (n + 2/3) (where n is an integer) may be arranged linearly at intervals, and the mover may be passed through them.
  • the integer n may be set in consideration of the space in which the line is accommodated.
  • FIG. 11 is a perspective view showing the entire configuration of the mover according to the third embodiment.
  • two types of flat magnets 42 a and 42 b are alternately arranged in a plurality of holes of a non-magnetic magnet holding spacer 43, and linear on both sides of the magnet holding spacer 43 in the width direction.
  • Guide rails 44 and 44 are provided.
  • FIG. 12A to 12D are perspective views showing a partial configuration of the mover 41.
  • FIG. FIG. 12A shows an arrangement example of two types of flat magnets 42a and 42b, and white arrows indicate the magnetization directions of the flat magnets 42a and 42b.
  • the flat magnets 42a and 42b are both magnetized in the thickness direction, but their magnetization directions are opposite to each other by 180 degrees.
  • FIG. 12B shows the magnet holding spacer 43.
  • the magnet holding spacer 43 has a flat rectangular parallelepiped shape as a whole, and a plurality of rectangular holes 43 a that are long in the width direction of the magnet holding spacer 43 are arranged in parallel in the longitudinal direction of the magnet holding spacer 43.
  • the opposing direction of the side frames 43b and 43b extending in the longitudinal direction on both sides in the width direction of the magnet holding spacer 43 and the longitudinal direction of the hole 43a do not coincide with each other and are shifted by several degrees.
  • the depth of the hole 43a is equal to the thickness of the flat magnets 42a and 42b, and the number of the holes 43a is equal to the total number of the flat magnets 42a and 42b.
  • each hole 43a of the magnet holding spacer 43 an adhesive is applied to the wall surface of each hole 43a of the magnet holding spacer 43, and the plate-like magnets 42a and 42b are alternately fitted into the holes 43a and fixed (see FIG. 12C).
  • the flat magnets 42a and 42b may be alternately arranged in the holes 43a, and an adhesive may be injected into the arrangement locations with a syringe or the like to fix them.
  • FIG. 12D shows the linear guide rails 44 and 44.
  • Each linear guide rail 44 has a long cylindrical shape as a whole, and a notch 44a is formed in a part of the peripheral surface of the linear guide rail 44 over the entire longitudinal direction. Then, by inserting the side frames 43b and 43b of the magnet holding spacer 43 into which the flat magnets 42a and 42b are fitted into the notches 44a and 44a of the linear guide rails 44 and 44, the movable as shown in FIG. A child 41 is produced.
  • FIGS. 14A to 14E and 15A and 15B are diagrams showing the structure of the armature according to the third embodiment, and FIGS. 14A to 14E are first to second armatures used in the armature 54 of the third embodiment.
  • FIG. 15A is a partial configuration diagram of the armature 54
  • FIG. 15B is an overall configuration diagram of the armature 54.
  • the first subunit 55 shown in FIG. 14A is made of a soft magnetic material, and includes an opening 55a through which the mover 41 passes, and a yoke portion 55b as a frame disposed outside the opening 55a. And a core portion 55c extending from the yoke portion 55b to one side in the thickness direction of the mover 41.
  • the core portion 55c has a trapezoidal shape in which the base end portion on the yoke portion 55b side has a rectangular shape in plan view, and the tip end portion on the opening portion 55a side becomes wider in the plan view.
  • the second subunit 56 shown in FIG. 14B is made of a soft magnetic material, and includes an opening 56a through which the mover 41 passes, and a yoke portion 56b as a frame disposed outside the opening 56a.
  • the auxiliary core portion 56c extends from the yoke portion 56b to one side in the thickness direction of the mover 41, and the core portion 56d extends from the yoke portion 56b to the other side in the thickness direction of the mover 41.
  • the core part 56d has the same shape as the core part 55c, the base end part on the yoke part 56b side has a rectangular shape in plan view, and the tip part on the opening part 56a side becomes wider toward the center in plan view. It has a trapezoidal shape.
  • the auxiliary core portion 56c has a shorter dimension than the core portion 56d, the base end portion on the yoke portion 56b side has a rectangular shape in plan view, and the width becomes narrower as the tip end portion on the opening portion 56a side approaches the center in plan view. It has a triangular shape.
  • the third subunit 57 shown in FIG. 14C is made of a soft magnetic material, and includes an opening 57a through which the mover 41 passes, and a yoke part 57b as a frame disposed outside the opening 57a.
  • the core portion 57c extends from the yoke portion 57b to one side in the thickness direction of the mover 41, and the auxiliary core portion 57d extends from the yoke portion 57b to the other side in the thickness direction of the mover 41.
  • the core portion 57c has the same shape as the core portion 55c, the base end portion on the yoke portion 57b side has a rectangular shape in plan view, and the tip end portion on the opening portion 57a side becomes wider toward the center in plan view.
  • the auxiliary core portion 57d has a shorter dimension than the core portion 57c, the base end portion on the yoke portion 57b side has a rectangular shape in plan view, and the width becomes narrower as the tip end portion on the opening portion 57a side approaches the center in plan view. It has a triangular shape.
  • the third subunit 57 is configured by rotating the second subunit 56 by 180 degrees.
  • the fourth subunit 58 shown in FIG. 14D is made of a soft magnetic material, and includes an opening 58a through which the mover 41 passes, and a yoke portion 58b as a frame disposed outside the opening 58a. And a core portion 58c extending from the yoke portion 58b to the other side in the thickness direction of the mover 41.
  • the core part 58c has the same shape as the core part 55c, and the core part 58c has a rectangular base end part on the yoke part 58b side in plan view and a tip part on the opening part 58a side in the center in plan view. It has a trapezoidal shape that becomes wider as you go.
  • the fourth subunit 58 is configured by rotating the first subunit 55 by 180 degrees.
  • a spacer unit 59 shown in FIG. 14E is made of a soft magnetic material, and includes an opening 59a through which the mover 41 passes, a yoke part 59b as a frame disposed outside the opening 59a, and a yoke And auxiliary core portions 59c and 59d extending from the portion 59b to both sides in the thickness direction of the mover 41.
  • the auxiliary core portions 59c and 59d have the same shape as the auxiliary core portion 56c and the auxiliary core portion 57d, the base end portion on the yoke portion 59b side is rectangular in plan view, and the distal end portion on the opening 59a side is flat. It has a triangular shape that becomes narrower toward the center.
  • the armature 54 includes a first subunit 55, a spacer unit 59, a second subunit 56, a spacer unit 59, a third subunit 57, a spacer unit 59, and a fourth subunit 58 in this order. It has a laminated structure (see FIG. 15A).
  • the armature 54 is configured by winding the winding wire 60b around the auxiliary core portion 59d on the other side in the thickness direction of the mover 41 (see FIG. 15B).
  • Both the winding lines 60a and 60b are connected so that the energization directions of the winding line 60a and the winding line 60b are reversed.
  • White arrow marks in FIG. 15B indicate the energization directions on the winding lines 60a and 60b.
  • FIG. 16 is a perspective view showing a configuration of a linear motor 70 according to the third embodiment.
  • the armature 54 functions as a stator. Then, by applying a current in the reverse direction to the winding wires 60a and 60b, the mover 41 penetrating through the hollow portion 61 of the armature 54 performs a reciprocating linear motion with respect to the armature 54 (stator).
  • a magnet holding spacer 43 storing a plurality of flat magnets 42a and 42b is supported by a linear guide rail 44 made of a magnetic material. Yes. Therefore, it is possible to increase the rigidity by giving the mover 41 high mechanical strength.
  • a magnetic material generally has a low bending strength and is likely to generate vibrations such as flexural vibration and resonance vibration.
  • the linear guide rail 44 is provided in the third embodiment, vibrations such as flexural vibration and resonance vibration can be suppressed even if the stroke becomes long. Therefore, even if it is moved at a high speed, a large vibration does not occur, and a stable high-speed linear movement without rattling can be realized.
  • the longitudinal direction of the flat magnets 42 a and 42 b is skewed about several degrees with respect to the opposing direction of the linear guide rails 44 and 44. Therefore, when the mover 41 is moved at a constant speed, the jerky movement (cogging) can be reduced, and a smooth high-speed linear motion can be realized.
  • the spacer unit 59 is provided with the auxiliary core portions 59c and 59d, and the gap between the same-polar cores is filled as much as possible to increase the cross-sectional area of the magnetic flux path to increase the magnetic flux. Thus, such magnetic saturation is prevented from occurring.
  • the first subunit 55 and the fourth subunit 58 that do not have the auxiliary core portion are arranged at both ends, respectively, so that the winding line 60a and the winding line 60b Can be made small. Accordingly, when the three-phase configuration is adopted, the total length can be shortened.
  • the first subunit 55, the second subunit 56, the third subunit 57, the fourth subunit 58, and the spacer unit 59 are respectively formed as three members at the same position in the thickness direction of the mover 41. It is divided.
  • FIGS. 17A to 17E are diagrams showing division patterns of the first to fourth subunits 55 to 58 and the spacer unit 59.
  • FIG. 17A, B, C, D, and E show division patterns of the first subunit 55, the second subunit 56, the third subunit 57, the fourth subunit 58, and the spacer unit 59, respectively. Each of these units is divided at the same position of the yoke portion.
  • the first subunit 55 is divided into an upper first member 551 including a core portion 55c, a central second member 552, and a lower third member 553.
  • the second subunit 56 includes an upper first member 561 including an auxiliary core portion 56c, a central second member 562, and a lower third member 563 including a core portion 56d. It is divided.
  • the third subunit 57 includes an upper first member 571 including the core portion 57c, a central second member 572, and a lower third member 573 including the auxiliary core portion 57d. It is divided. As shown in FIG.
  • the fourth subunit 58 is divided into an upper first member 581, a central second member 582, and a lower third member 583 including the core portion 58 c.
  • the spacer unit 59 is divided into an upper first member 591 including an auxiliary core portion 59c, a central second member 592, and a lower side 593 including an auxiliary core portion 59d. .
  • the first member 551 of the first subunit 55, the first member 591 of the spacer unit 59, the first member 561 of the second subunit 56, the first member 591 of the spacer unit 59, and the first of the third subunit 57 The member 571, the first member 591 of the spacer unit 59, and the first member 581 of the fourth subunit 58 are stacked in this order to obtain an upper first intermediate body 71 as shown in FIG. 18A.
  • the second member 552 of the first subunit 55, the second member 592 of the spacer unit 59, the second member 562 of the second subunit 56, the second member 592 of the spacer unit 59, and the second member of the third subunit 57 The member 572, the second member 592 of the spacer unit 59, and the second member 582 of the fourth subunit 58 are laminated in this order to obtain a second intermediate body 72 at the center as shown in FIG. 18B.
  • the third member 553 of the first subunit 55, the third member 593 of the spacer unit 59, the third member 563 of the second subunit 56, the third member 593 of the spacer unit 59, and the third member 57 of the third subunit 57 The member 573, the third member 593 of the spacer unit 59, and the third member 583 of the fourth subunit 58 are laminated in this order to obtain a lower third intermediate body 73 as shown in FIG. 18C.
  • the first to fourth subunits 55 to 58 and the spacer unit 59 are divided. Therefore, it is possible to apply the winding lines 60a and 60b in the divided state, and the winding process is easy, and the armature 54 can be easily manufactured.
  • the magnetic potential is the same, even if the magnetic potential is divided, the leakage of the magnetic flux is small, and the thrust characteristics are not adversely affected.
  • the above three armatures 54 are provided with a magnetic pole pitch ⁇ (n + 1/3). ) Or magnetic pole pitch ⁇ (n + 2/3) (where n is an integer), and is arranged in a straight line so that the movable element 41 penetrates them.
  • the three armatures 54 are connected and fixed by passing screws through holes provided in the units of the armatures 54.
  • the integer n may be set in consideration of the space in which the line is accommodated.
  • Example 1 corresponds to the above-described first embodiment.
  • a plate-like movable element 1 used for a linear motor a movable element including a permanent magnet having a shape as shown in FIG. 1 was produced.
  • a soft magnetic body 3 pole piece
  • a soft steel made by SPCC having a length of 50 mm, a width of 8 mm, and a thickness of 6 mm was produced by cutting.
  • an armature 4 was produced. 16 pieces of armature material having a shape as shown in FIG. 20A were cut out from a 0.5 mm-thick silicon steel sheet, and the 16 pieces thus cut out were stacked and bonded to produce a first subunit 5 having a thickness of 8 mm. (See FIG. 2A). Also, 16 pieces of armature material having a shape as shown in FIG. 20B are cut out from a 0.5 mm-thick silicon steel plate, and the 16 pieces thus cut out are stacked and bonded together to form a second subunit 6 having a thickness of 8 mm. It produced (refer FIG. 2B). Further, eight armature materials having a shape as shown in FIG. 20C were cut out from a 0.5 mm-thick silicon steel plate, and these eight cut-out pieces were stacked and bonded to produce a spacer unit 11 having a thickness of 4 mm. (See FIG. 5).
  • the units thus fabricated are stacked in the order of the first subunit 5, the spacer unit 11, the second subunit 6, the spacer unit 11, the first subunit 5, the spacer unit 11, and the second subunit 6.
  • a single-phase unit was constructed (see FIG. 2C, except that the spacer unit 11 is not shown).
  • the thickness of this single-phase unit is 44 mm.
  • a polyimide tape is spread on the gaps at the four corners where the winding lines for the armature core are to be secured, and on that While passing through a magnet wire having a diameter of 1.2 mm, it was wound 100 times in two places (see FIG. 2D). And it connected in series so that the direction of the current would be reversed when energized.
  • the mover 1 was inserted (see FIG. 3) and fixed to the test bench so that the mover 1 could move in the longitudinal direction without contacting the armature 4.
  • 21A and 21B show the configuration of the manufactured linear motor 10.
  • One end of a pair of drive coils wound on three armatures 4 was connected, and the other end was connected to a motor controller using a star connection that connected three-phase power supplies U, V, and W phases. Further, an optical linear scale was bonded to the tip of the mover 1 and a linear encoder was attached to the test bench fixed side so that the position of the mover 1 was read. The position signal detected by the linear encoder is output to the motor controller to control the position of the mover 1.
  • the horizontal axis of FIG. 22 is the effective value of the drive current per one armature phase ⁇ the number of coil turns.
  • the maximum thrust exceeded 450 N, and the mass of the mover was 0.9 kg, so the thrust / mover mass ratio was 500 N / kg.
  • the mass of the mover is about 2.5 kg, and the thrust / mover mass ratio is about 200 N / kg. Therefore, in the linear motor of the present invention, the mass of the mover can be reduced to about 2/5 in order to obtain the same thrust as compared with the conventional linear motor.
  • the present invention can provide a linear motor that is very effective for high-speed processing in a processing machine or the like.
  • Example 2 is an example corresponding to the second embodiment described above.
  • the plate-like movable element 21 used for the linear motor was produced as follows.
  • the magnetizing directions were arranged so that the magnetization direction alternated up and down in the thickness direction.
  • an aluminum spacer having a length of 50 mm, a width of 2 mm, and a thickness of 5 mm was inserted between adjacent magnets and bonded to the magnet to assemble the mover.
  • the manufactured mover 21 is composed of 30 plate-like magnets 22a and 22b and 29 spacers (not shown), and the size is 358 mm in length, 50 mm in width, and 5 mm in thickness.
  • an armature 24 was produced.
  • a 20-mm armature material having a shape as shown in FIG. 23A is cut from a 0.5 mm-thick silicon steel plate by wire cutting, and the 20 cut-out pieces are stacked and bonded together to form a first subunit having a thickness of 10 mm. 25 and the 2nd subunit 26 were produced (refer FIG. 7A and B).
  • four armature materials having a shape as shown in FIG. 23B were cut out from a 0.5 mm-thick silicon steel plate, and these four cut-out pieces were stacked and bonded to produce a spacer unit 31 having a thickness of 2 mm. (See FIG. 10).
  • the first subunit 25 and the second subunit 26 are merely in an upside-down relationship, and if one of them is rotated 180 degrees, it matches the other shape. Therefore, unlike the first embodiment, the first subunit 25 and the second subunit 26 can be manufactured using the same mold.
  • the units thus fabricated are stacked in the order of the first subunit 25, the spacer unit 31, the second subunit 26, the spacer unit 31, the first subunit 25, the spacer unit 31, and the second subunit 26.
  • a single-phase unit was constructed (see FIG. 7C, except that the spacer unit 31 is not shown).
  • the thickness of this single-phase unit is 46 mm.
  • a magnet wire having a diameter of 1.2 mm with a polyimide tape for insulation is passed through the gaps at the four corners while passing 2 The place was beaten 100 times (see FIG. 7D). And it connected in series so that the direction of the current would be reversed when energized.
  • FIG. 24 shows the configuration of the manufactured linear motor 30.
  • One end of a pair of drive coils wound around the three armatures 24 was connected, and the other end was connected to a motor controller with a star connection connecting the three-phase power supplies U, V, and W phases.
  • a motor controller with a star connection connecting the three-phase power supplies U, V, and W phases.
  • an optical linear scale was bonded to the tip of the mover 21 and a linear encoder was attached to the test bench fixed side so that the position of the mover 21 was read.
  • the position signal detected by the linear encoder is output to the motor controller to control the position of the mover 21.
  • the horizontal axis of FIG. 25 is the effective value of the drive current per armature phase ⁇ the number of turns of the coil.
  • the maximum thrust was 750 N, and the mass of the mover was 0.7 kg, so the thrust / mover mass ratio was 1070 N / kg.
  • This linear motor 30 has a thrust / mover mass ratio that is five times or more larger than that of a conventional linear motor of about 200 N / kg. Therefore, in the linear motor of the present invention, the mass of the mover can be reduced to about 1/5 in order to obtain the same thrust as compared with the conventional linear motor.
  • the present invention can provide a linear motor that is very effective for high-speed processing in a processing machine or the like.
  • Example 2 a larger thrust is obtained than in Example 1.
  • Example 1 first embodiment
  • Example 2 second embodiment
  • any configuration may be selected according to the use application and purpose of the linear motor.
  • Example 3 is an example corresponding to a modification of the above-described third embodiment.
  • an armature 54 was produced. After cutting 16 pieces of armature material having a planar shape as shown in FIGS. 14A and D from a 0.5 mm-thick silicon steel plate by wire cutting, these 16 pieces cut out and bonded together (thickness 8 mm) By dividing into three, three types of separation members in the first subunit 55 and the fourth subunit 58 were obtained (see FIGS. 17A and 17D). Examples of specific dimensions and shapes are shown in FIG. In FIG. 26, (x, y) represents the coordinate position (unit of length: mm) of each point when the center coordinate is (0, 0).
  • the first subunit 55 and the fourth subunit 58 only have an upside-down relationship, and if one of them is rotated 180 degrees, it matches the shape of the other. Therefore, the first subunit 55 and the fourth subunit 58 can be manufactured using the same mold.
  • FIGS. 17B and 17C show three types of separation members obtained in the second subunit 56 and the third subunit 57 (see FIGS. 17B and 17C).
  • FIG. (X, y) in FIG. 27 represents the coordinate position (unit of length: mm) of each point when the center coordinate is (0, 0).
  • the second subunit 56 and the third subunit 57 only have an upside-down relationship, and if one of them is rotated 180 degrees, it matches the shape of the other. Therefore, the second subunit 56 and the third subunit 57 can be manufactured using the same mold.
  • a first member 71 of each unit is stacked to form a first intermediate 71 (see FIG. 18A), a second member of each unit is stacked to form a second intermediate 72 (see FIG. 18B), and each unit The third member 73 was laminated to form the third intermediate 73 (see FIG. 18C).
  • a magnet wire having a diameter of 1.2 mm with a polyimide tape for insulation is attached to the core portion and the auxiliary core portion of the first intermediate body 71 in a lump 100 times and driven.
  • the same magnet wire was collectively wound 100 times on the core portion and the auxiliary core portion of the third intermediate 73 (see FIGS. 19A and 19B). And it connected in series so that the direction of the current would be reversed when energized.
  • the first intermediate body 71, the second intermediate body 72, and the third intermediate body 73 were assembled to produce the armature 54 (see FIG. 15B).
  • the mover 41 was inserted (see FIG. 16) and fixed to the test bench so that the mover 41 could move in the longitudinal direction without contacting the armature 54.
  • One end of a pair of drive coils wound around the three armatures 54 was connected, and the other end was connected to a motor controller with a star connection connecting the three-phase power supplies U, V, and W phases. Further, an optical linear scale was bonded to the tip of the mover 41, and a linear encoder was attached to the test bench fixed side so that the position of the mover 41 was read. The position signal detected by the linear encoder is output to the motor controller to control the position of the mover 41.
  • the thrust of the mover 41 was measured when the linear guide rail 44 was moved by hand without passing an electric current. At this time, thrust was measured by a method of pressing a force gauge against the mover 41. The measurement results are shown in FIG. According to the phase angle, the thrust was only changed by ⁇ 2.3 N, and it was confirmed that the mover 41 can move smoothly.
  • the thrust of the mover 41 was measured by changing the drive current applied to the drive coil. At this time, thrust was measured by a method of pressing a force gauge against the mover 41.
  • the measurement results are shown in FIG.
  • the horizontal axis of FIG. 31 is the effective value of the drive current per one armature phase ⁇ the number of coil turns.
  • a thrust proportional to the drive current is obtained.
  • the drive current is increased, the core is saturated and the thrust current ratio is reduced.
  • the reduction rate is less than 1 dB (11%) until the thrust is 320 N. It is suppressed.
  • the cogging can be reduced and the smooth high-speed linear motion can be realized by skewing the magnet shape with respect to the longitudinal direction of the mover.

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PCT/JP2009/004060 2008-11-18 2009-08-24 可動子、電機子及びリニアモータ WO2010058500A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2010520355A JP5434917B2 (ja) 2008-11-18 2009-08-24 電機子及びリニアモータ
EP09827282.6A EP2360817B1 (en) 2008-11-18 2009-08-24 Movable element, armature, and linear motor
US13/129,861 US8884473B2 (en) 2008-11-18 2009-08-24 Mover, armature, and linear motor

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JPWO2013122031A1 (ja) * 2012-02-16 2015-05-11 日立金属株式会社 リニアモータ
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JPWO2010058500A1 (ja) 2012-04-19
TW201021370A (en) 2010-06-01
JP5434917B2 (ja) 2014-03-05
KR20110084329A (ko) 2011-07-21
EP2360817A1 (en) 2011-08-24
EP2360817A4 (en) 2017-05-17
TWI472126B (zh) 2015-02-01
US20110221283A1 (en) 2011-09-15

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