WO2019065002A1 - Moteur et son procédé de fabrication - Google Patents

Moteur et son procédé de fabrication Download PDF

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Publication number
WO2019065002A1
WO2019065002A1 PCT/JP2018/030865 JP2018030865W WO2019065002A1 WO 2019065002 A1 WO2019065002 A1 WO 2019065002A1 JP 2018030865 W JP2018030865 W JP 2018030865W WO 2019065002 A1 WO2019065002 A1 WO 2019065002A1
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WO
WIPO (PCT)
Prior art keywords
motor
magnetic
stator
connecting portion
magnetic resistance
Prior art date
Application number
PCT/JP2018/030865
Other languages
English (en)
Japanese (ja)
Inventor
ザイニ アリフ
研太 元吉
一将 伊藤
信一 山口
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018566616A priority Critical patent/JP6611966B2/ja
Priority to KR1020207007788A priority patent/KR102414864B1/ko
Priority to CN201880061144.4A priority patent/CN111406361B/zh
Priority to TW107133198A priority patent/TWI665851B/zh
Publication of WO2019065002A1 publication Critical patent/WO2019065002A1/fr

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    • 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
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
    • 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
    • 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
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • 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

Definitions

  • the present invention relates to an electric motor provided with a field and an armature, and a method of manufacturing the electric motor.
  • linear motor is driven by direct drive which directly drives the device without passing through the transmission. For this reason, as compared with a drive system in which the rotary mechanism is converted into linear motion by combining the rotary servomotor and the ball screw, the linear motor does not have a reduction in rigidity due to backlash of the ball screw and has a short response time. realizable. Thus, linear motors allow high speed, high acceleration and high precision positioning operations of the device.
  • the conventional linear motor includes a stator, which is a field, and a mover, which is an armature that faces the stator with a fixed air gap and moves relative to the stator.
  • a coil is wound around each tooth of a core made of a magnetic substance on the mover.
  • the stator comprises an iron core in the form of a protrusion and a base for supporting the protrusion. Due to the presence of the projecting iron core in the stator, the magnetic material region and the air region are alternately arranged in the moving direction of the mover in the stator.
  • the configuration of the stator realizes the variation of permeance necessary to drive the motor. So far, structures that can realize various permeance variations have been reported (see, for example, Patent Document 1).
  • Patent Document 1 slit-like holes are provided at equal intervals in the stator by performing etching on a long plate. With this configuration, the areas of iron core and air alternate in the moving direction of the mover. For this reason, the iron core left for the slits virtually plays the role of projections.
  • the configuration of the stator realizes permeance fluctuation in the moving direction of the mover.
  • an iron core playing a role of a projection is fixed to the base of the stator by a diffusion bonding method. For this reason, the magnetic property of the protrusion of the stator through which the main magnetic flux flowing from the coil of the mover passes is deteriorated. Therefore, there is a problem that the thrust characteristic of the motor is lowered.
  • the present invention has been made to solve the problems as described above, and it is an object of the present invention to provide an electric motor which does not reduce the thrust characteristic and a method of manufacturing the electric motor.
  • An electric motor includes a field, an armature facing the field and an air gap, and an armature moving relative to the field, and a direction in which the armature moves relative to the field Is the X direction, the direction from the field toward the armature is the Z direction, and the direction perpendicular to the X direction and the Z direction is the Y direction, the field extends in the X direction and is a base made of a magnetic material.
  • a connecting portion formed of magnetic material by connecting the portions, and the magnetic resistance in the X direction in the connecting portion is larger than the magnetic resistance in the Y direction in the tooth portion connected by the connecting portion.
  • the manufacturing method according to the present invention further includes a first step of laminating the magnetic steel plates in the Z direction to form teeth and a connecting portion, and a second step of fixing the teeth and the connecting portion to the base.
  • FIG. 1 It is a perspective view which shows the electric motor in Embodiment 1 of this invention. It is sectional drawing perpendicular
  • FIG. 1 It is a perspective view of the electric motor of the 1st comparative example used as comparison of the electric motor in Embodiment 1 of this invention. It is sectional drawing perpendicular
  • FIG. 13 is a cross-sectional view taken along the line BB in FIG. 12; It is a perspective view of the stator of the 4th modification of the electric motor in Embodiment 1 of this invention. It is CC sectional drawing of FIG. It is a perspective view of the stator of the 5th modification of the electric motor in Embodiment 2 of this invention. It is the figure which looked at the stator of the 5th modification of the electric motor in Embodiment 2 of this invention from the space
  • FIG. 21 is a cross-sectional view of a stator of a sixth modification of the motor according to the third embodiment of the present invention, taken along the line CC in FIG. 21; It is a disassembled perspective view and perspective view of a stator of a 7th modification of a motor in Embodiment 4 of this invention.
  • FIG. 21 is a cross-sectional view of a stator of a sixth modification of the motor according to the third embodiment of the present invention, taken along the line CC in FIG. 21; It is a disassembled perspective view and perspective view of a stator of a 7th modification of a motor in Embodiment 4 of this invention.
  • FIG. 24 is a cross-sectional view taken along the line DD in FIG. 23 of a stator of a seventh modified example of the motor in accordance with Embodiment 4 of the present invention; It is the figure which looked at the stator of the 7th modification of the electric motor in Embodiment 4 of this invention from the space
  • FIG. 1 is a perspective view showing a motor according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view perpendicular to the width direction Y of the motor in the present embodiment.
  • a motor 101 includes a stator 3 which is a field, and a mover 2 which is an armature opposed to the field via a gap G and moved relative to the field.
  • the mover 2 of the motor 101 is supported by a slider or the like (not shown). Further, the direction in which the mover 2 as the armature moves relative to the stator 3 as the field is taken as the X direction.
  • the direction from the stator 3 as the field toward the mover 2 as the armature is taken as the Z direction.
  • a direction perpendicular to the X direction and the Z direction is taken as a Y direction.
  • the mover 2 is movable relative to the stator 3 along the X direction.
  • the mover 2 includes a mover core 4 composed of six divided cores 5 arranged along the X direction, and six coils 6 wound around each divided core 5.
  • the split core 5 is composed of a laminated core in which steel plates, which are magnetic materials such as electromagnetic steel plates, are stacked in the Y direction.
  • the split core 5 includes a core back 7 and mover teeth 8 protruding from the core back 7 toward the air gap G.
  • a coil 6 is wound around the mover teeth 8.
  • the split core 5 may be composed of a magnetic yoke that is magnetic and not stacked.
  • the coil 6 is a so-called concentrated winding which is wound around one mover tooth 8 in a concentrated manner.
  • the winding method of the coil 6 may be a so-called distributed winding method in which a plurality of mover teeth 8 are straddled.
  • mover 2 is comprised with the split core 5 and the coil 6, the magnet may be further arrange
  • mover core 4 is constituted by a plurality of split cores 5, mover core 4 may be an integral core in which six split cores 5 are integrated.
  • the stator 3 which is a magnetic field comprises a base portion 10 extending in the X direction and made of a magnetic material, and a magnetic body protruding from the base portion 10 in the Z direction and spaced in the X direction And a bridge 11, which is a plurality of teeth.
  • the number of split cores 5 is six
  • the number of bridges 11 that are teeth portions of the stator 3 disposed to face the mover 2 is five.
  • the width in the X direction of the mover 2 which is the width of both ends in the X direction in the split cores 4 at both ends is one end face in the X direction of the bridge 11 and one end face in the X direction of the bridge 11 adjacent to the bridge 11 Equal to five times the spacing in the X direction with
  • FIG. 3 is a perspective view of the stator of the motor in the present embodiment.
  • FIG. 3 shows seven bridges 11 of the stator 3.
  • the stator 3 which is a field further includes a connecting portion 12 made of a magnetic material and a bolt 14.
  • the connection part 12 connects the end parts of the bridge 11 which is two teeth parts which adjoin each other facing the X direction in the both ends of the bridge 11 which is a teeth part in the Y direction.
  • a plurality of magnetic steel plates 9 are stacked in the Z direction to form the bridge 11, which is a teeth portion, and the connecting portion 12. Further, in the magnetic steel plate 9, a slit 13 which is a hole is formed in a region surrounded by the bridge 11 and the connecting portion 12.
  • the bridge 11, the connection portion 12, and the slit 13 are formed on the magnetic steel plate 9 by machining a magnetic steel plate such as a magnetic steel plate using a press, an electric discharge machine, or the like.
  • the bolt 14 fastens the connecting portion 12 and the base portion 10 through the bolt hole portion 15 shown in FIG. 4.
  • the bolt 14 may be a magnetic body, but a nonmagnetic body is preferable.
  • FIG. 4 is an exploded view of the stator of the motor in the present embodiment.
  • the base portion 10 of the stator 3 and the magnetic steel plates 9 constituting the bridge 11 and the connecting portion 12 are disassembled.
  • the connecting portion 12 has a magnetic resistance increasing portion 15 which is a bolt hole portion 15 penetrating the connecting portion 12 in the Z direction.
  • the magnetic resistance in the X direction of the magnetic resistance increasing portion 15 is larger than the magnetic resistance in the X direction of the portion excluding the bolt hole 15 which is the magnetic resistance increasing portion in the connecting portion 12.
  • bolt holes 16 for integrating the plurality of magnetic steel plates 9 and the base portion 10 are formed.
  • the bolt 14 passes through the bolt holes 15 and 16 and is fastened to a screw hole provided in a device (not shown) disposed on the surface of the base 10 opposite to the side where the magnetic steel plate 9 is disposed. And the magnetic steel plate 9 and the base part 10 are fastened and integrated.
  • FIG. 3 although the bolt 14 is inserted in all the bolt hole parts 15 and 16, when not requiring a big fastening force, the bolt 14 is inserted in a part of bolt hole parts 15 and 16 It may be done.
  • FIG. 5 is a view of the stator of the motor according to the present embodiment as viewed from the air gap side.
  • FIG. 6 is an enlarged view of a portion B of FIG. 5 when the stator of the motor in the present embodiment is viewed from the air gap side.
  • FIG. 6 is an enlarged view of a dotted-line frame in a portion B of FIG.
  • the bolt 14 is not shown for convenience.
  • the width in the Y direction of the connecting portion 12 is Wa
  • the width in the Y direction of the bolt hole 15 which is the magnetic resistance increasing portion is Wc
  • Wb Wa ⁇ Wc.
  • the five bridges 11 are disposed on the stator 3 so as to face the six mover teeth 8 of the mover 2.
  • three bridges of the mover 2 are arranged. It may be a combination of other numbers such as the two bridges 11 of the stator 3 facing the mover teeth 8.
  • FIG. 7 is a perspective view of a motor of a first comparative example which is a comparison of the motor according to the present embodiment.
  • FIG. 8 is a cross-sectional view perpendicular to the Y direction of the motor of the first comparative example, which is a comparison of the motor according to the present embodiment.
  • the first comparative example 102 of the motor includes a stator 17 which is a field and a mover 2 similar to the motor 101 of the present embodiment.
  • the stator 17 is disposed on the back yoke 20 of magnetic material, the protrusion 19 of magnetic material protruding from the back yoke 20 in the air gap G direction, and the surface of the back yoke 20 opposite to the side on which the protrusion 19 is disposed. And a clamp 24 for fixing the surface of the back yoke 20 and the base 23 along the X direction and the Z direction, and a bolt 25 for fixing the clamp 24 and the base 23.
  • the base portion 23 is formed with a screw hole 21 provided along the Y direction from the surface along the X direction and the Z direction, and a bolt hole 22 penetrating in the air gap G direction.
  • the protrusion 19 and the back yoke 20 are formed by laminating the magnetic steel plates 18 formed in an uneven shape in the Y direction. Further, the plurality of magnetic steel plates 18 are integrally fixed by suppressing the surfaces of both ends of the back yoke 20 in the Y direction, that is, the surfaces along the X direction and the Z direction.
  • the clamp 24 is fastened to the base portion 23 by fastening a bolt 25 to a screw hole 21 provided in the base portion 23.
  • the base portion 23 has a bolt (not shown) passing through a bolt hole 22 provided in the base portion 23, and is fastened to a device in which the first comparative example 102 of the motor is incorporated.
  • the motor 101 in the present embodiment will be described.
  • the inventor of this application invented the electric motor 101 which reduces a number of parts and improves assemblability, without reducing the characteristic of an electric motor.
  • the bolt 14 passes through the bolt holes 15 and 16, and a screw hole is provided in a device disposed on the surface of the base 10 opposite to the side on which the magnetic steel plate 9 is disposed. It is concluded.
  • the method of manufacturing the motor 101 is based on a first step of laminating the magnetic steel plates 9 in the Z direction to form the bridge 11 and the connecting portion 12 which are teeth, and the bridge 11 and the connecting portions 12 which are teeth. And a second step of fixing to the part 10.
  • the magnetic steel plate 9 and the base portion 10 are fastened and integrated. Therefore, the lamination of the magnetic steel plates 9 and the integration of the magnetic steel plates 9, the base portion 10, and the device can be performed in one assembly process, and the assemblability is improved.
  • the clamp 24 required when fixing the plurality of magnetic steel plates 18 in the first comparative example 102 of the motor is not necessary. Therefore, in the motor 101 of the present embodiment, the number of parts can be reduced. Furthermore, the screw hole 21 for fixing the clamp 24 in the base portion 23 can be eliminated, and the number of processing steps of the screw hole 21 can be reduced. Thus, the cost of the motor 101 can be reduced.
  • the magnetic steel plate 9 of the motor 101 is not limited to the magnetic steel plate having the insulating film, and a magnetic steel plate not having the insulating film may be used. In this case, the cost of the motor 101 can be further reduced.
  • the effect of the characteristic improvement of the motor 101 of the present embodiment will be described.
  • the protrusions 19 which are regions of the magnetic body in the stator 17 and the air region are alternately present in the X direction. For this reason, the fluctuation of the permeance necessary for driving the first comparative example 102 of the motor occurs.
  • the remaining bridge 11 plays the same role as the protrusion 19 in the stator 17 of the first comparative example 102 of the motor.
  • the cross-sectional shape of the motor 101 shown in FIG. 2 is compared with the cross-sectional shape of the first comparative example 102 of the motor shown in FIG. 8, the same uneven shape can be confirmed and it can be understood that the bridge 11 corresponds to the projection 19 .
  • a magnetic path is formed in which magnetic flux generated from the mover passes through the bridge 11, passes through the base portion 10, passes through the adjacent bridges 11, and returns to the mover 2.
  • the magnetic flux generated from the mover 2 flows through the bridge 11 and in the magnetic steel plate 9 to generate a thrust, and the mover 2 moves.
  • the path of the magnetic flux which does not contribute to the thrust to be the leakage flux flowing from the bridge 11 to the connecting portion 12 It will be formed. Therefore, in addition to the role of fastening the magnetic steel plate 9 and the base portion 10, the bolt hole portion 15 also plays a role of reducing the leakage flux passing through the connecting portion 12 and improving the thrust. This will be described later.
  • the width in the Y direction of the connecting part 12 is Wa
  • the width in the Y direction of the magnetic resistance increasing part 15 is Wc
  • Wb Wa ⁇ Wc.
  • n the number of magnetic steel plates 9 and t is the thickness in the Z direction which is the stacking direction of the magnetic steel plates 9, a cross-sectional area A perpendicular to the magnetic path is expressed by the following equation.
  • A Wa ⁇ n ⁇ t (2)
  • the magnetic resistance in the X direction of the magnetic resistance increasing portion 15 is larger than the magnetic resistance in the X direction of the portion excluding the magnetic resistance increasing portion 15 in the connecting portion 12. For this reason, the magnetic flux density which is the density of the magnetic flux which flows through connection part 12 becomes high.
  • the relative magnetic permeability ⁇ r of the connecting portion 12 is significantly reduced and does not change to 1 which is the value of the relative magnetic permeability of air.
  • the magnetic resistance in the X direction in the connecting portion 12 is larger than the magnetic resistance in the Y direction in the bridge 11 which is a tooth portion. For this reason, the magnetic flux flowing from the bridge 11 to the mover 2 is increased by an amount corresponding to the decrease of the magnetic flux flowing to the mover 2 via the connection portion 12. Therefore, in the present embodiment, it is possible to obtain the electric motor 101 which does not reduce the thrust characteristic.
  • the rolling direction of the directional electromagnetic steel sheet is made to coincide with the Y direction of the motor 101.
  • the magnetic resistance in the X direction passing through the connecting portion 12 is the bridge 11 connected by the connecting portion 12 Is larger than the magnetoresistance in the Y direction passing through the For this reason, it is possible to further reduce the leakage magnetic flux returning from the connection portion 12 to the mover 2, and to further improve the thrust of the motor 101.
  • FIG. 9 is a view of the stator of the motor according to the present embodiment as viewed from the air gap side.
  • the arrows in FIG. 9 represent the circulating current ic flowing through the magnetic steel plate 9 of the stator 3.
  • the bolt hole portion 15 also has a role of reducing the circulating current ic flowing through the magnetic steel plate 9 of the stator 3.
  • a circulating current ic flowing in the direction of the arrow in FIG. 9 is generated so as to cancel the magnetic flux generated from the mover 2.
  • the circulating current ic is not only the loss of the motor 101 but also the braking force for reducing the speed of the mover 2.
  • the connecting portion 12 is provided with a bolt hole portion 15.
  • the presence of the bolt holes 15 reduces the width of the connecting portion 12 in the Y direction from Wa to Wb. For this reason, the electrical resistance in the X direction in the connecting portion 12 increases, and the circulating current ic can also be reduced.
  • the leakage magnetic flux and the circulating current ic can be simultaneously reduced by changing the width of the connecting portion 12 in the Y direction from Wa to Wb.
  • the leakage flux and the circulating current ic can be reduced as the width Wb of the connecting portion 12 in the Y direction is reduced.
  • the bolt 14 is a magnetic body
  • the magnetic resistance in the X direction of the connecting portion 12 including 14 may be larger than the magnetic resistance in the Y direction of the bridge 11 which is a tooth portion.
  • the lower limit of the width Wb of the connecting portion 12 in the Y direction is t / 2 which is half the thickness t of the magnetic steel plate 9.
  • the cross section perpendicular to the X direction of the connecting portion 12 is a cross section perpendicular to the Y direction of the bridge 11 from the relationship of Wb ⁇ T / 3. It becomes smaller than the area. Therefore, the magnetic resistance in the X direction in the connecting portion 12 is larger than the magnetic resistance in the Y direction in the bridge 11 which is a tooth portion connected by the connecting portion 12.
  • FIG. 10 is a cross-sectional view perpendicular to the Y direction in the first modified example of the motor in the present embodiment.
  • the same components as those of the motor 101 according to the present embodiment are assigned the same reference numerals.
  • the first modification 101a of the motor is different from the motor 101 according to the present embodiment in the following point.
  • a first modification 101a of the electric motor is a mover 3a which is a field, and a stator 2a which is an armature opposed to the field via a gap G and moved relative to the mover 3a. And have.
  • the mover 3a and the stator 2a move relative to each other.
  • the mover 3a is a field and the stator 2a is an armature.
  • the role of the mover 3a and the role of the stator 2a are switched with respect to the configuration of the motor 101.
  • the mover 3a may play a role of a field
  • the stator 3a may play a role of an armature.
  • FIG. 11 is a cross-sectional view perpendicular to the Y direction in a second modified example of the motor in the present embodiment.
  • the second modification 101b of the motor is different from the motor 101 according to the present embodiment in the following point.
  • a second modification 101b of the motor includes a rotor 3b which is a field, and a stator 2b which is an armature opposed to the field via a gap G and moved relative to the rotor 3b. There is.
  • the rotor 3b and the stator 2b move relative to each other as the rotor 3b rotates and moves.
  • the circumferential direction in which the rotor 3b, which is a field, rotates relative to the stator 2b, which is an armature is taken as an X direction.
  • the radial direction from the rotor 3b to the stator 2b is taken as the Z direction.
  • An axial direction perpendicular to the X direction and the Z direction is taken as a Y direction.
  • the stator 2b is provided with a stator core 4b constituted by 12 divided cores 5b arranged along the X direction, and 12 coils 6 wound around each divided core 5b.
  • the split core 5 b includes a core back 7 b and stator teeth 8 b protruding from the core back 7 b toward the air gap G.
  • the rotor 3b which is a magnetic field, includes a rotary shaft 26 having an axial center coinciding with the axial center of the stator 2b, a base portion 10b extending in the X direction and made of an annular magnetic body, and a base portion 10b.
  • the bridge 11 is provided with a plurality of teeth portions that are formed of magnetic material and are arranged in a row in the X direction so as to protrude in the Z direction.
  • the base portion 10 b is fixed to the outer periphery of the rotating shaft 26 and rotates integrally with the rotating shaft 16.
  • the rotor 3b is a connecting portion 12 formed of a magnetic material, connecting the end portions of two adjacent bridges 11 facing each other in the X direction at both ends of the bridge 11 in the Y direction. And a bolt 14 for fastening the connecting portion 12 and the base portion 10 through the bolt holes 15 provided in the connecting portion 12.
  • the electric motor in the present embodiment is a linear motor which moves linearly as in the electric motor 101 and the first modification 101a, while the rotor 3b is different as in the second modification 101b of the electric motor. May be a rotating machine that rotates.
  • the magnetic steel plates 9 in which the slits 13 are formed in the Z direction are stacked, and the bolt holes 15 are provided in the connecting portion 12.
  • the magnetic resistance in the X direction in the connecting portion 12 is larger than the magnetic resistance in the Y direction in the bridge 11 which is a tooth portion. Therefore, in the present embodiment, the motors 101, 101a, 101b can be obtained without reducing the thrust characteristics.
  • FIG. 12 is a perspective view of a stator of a third modification of the motor in the first embodiment for carrying out the present invention.
  • FIG. 13 is an exploded view of the stator of FIG. 12 in the Z direction.
  • FIG. 14 is a cross-sectional view taken along the line BB in FIG.
  • the base portion 10 is formed by laminating steel plates in the Z direction.
  • the stator 3 which is a field further includes a connecting portion 12 made of a magnetic material and a bolt 14.
  • a laminated steel plate may be used as the bridge 11 and the connecting portion 12.
  • the bridge 11 and the connecting portion 12 may not be laminated steel plates.
  • FIG. 14 shows the flow of magnetic flux in the XZ plane.
  • the magnetic flux enters or leaves the bridge 11 according to the position of the mover 2 relative to the stator 3.
  • the flowing magnetic flux may flow from the right to the left or from the left to the right.
  • An eddy current is generated in the base portion 10 in accordance with the change in the direction in which the magnetic flux flows in the base portion 10.
  • the eddy current generates a magnetic flux that interferes with the magnetic flux flowing to the base portion 10. This increases the loss of the motor.
  • the base portion 10 is formed by laminating steel plates in the Z direction. Thereby, the flow of the eddy current at the point M can be interrupted, and the reduction of the loss of the motor due to the eddy current can be realized.
  • FIG. 15 is a perspective view of a stator of a fourth modified example of the motor in the first embodiment for carrying out the present invention.
  • FIG. 16 is a cross-sectional view taken along the line CC in FIG.
  • the base portion 10 is formed by laminating steel plates in the X direction.
  • the stator 3 which is a field further includes a connecting portion 12 made of a magnetic material and a bolt 14.
  • a laminated steel plate may be used as the bridge 11 and the connecting portion 12.
  • the bridge 11 and the connecting portion 12 may not be laminated steel plates.
  • FIG. 16 shows the flow of magnetic flux in the XZ plane.
  • the magnetic flux enters or leaves the bridge 11 according to the position of the mover 2 relative to the stator 3.
  • the flowing magnetic flux may flow from the bottom to the top or from the top to the bottom.
  • an eddy current is generated in the base portion 10.
  • the eddy current generates a magnetic flux that interferes with the magnetic flux flowing to the base portion 10. This increases the loss of the motor.
  • the base portion 10 is formed by laminating steel plates in the X direction. Thereby, the flow of the eddy current at the point L and the point N can be interrupted, and the reduction of the loss of the motor due to the eddy current can be realized.
  • FIG. 17 is a perspective view of a stator of a fifth modification of the motor in the second embodiment for carrying out the present invention.
  • FIG. 18 is a view of a stator of a fifth modified example of the motor according to the present embodiment as viewed from the air gap side. In FIG. 18, the bolt 14 is not shown for convenience.
  • the fifth modification 101c of the motor is different from the motor 101 according to the first embodiment in the following points.
  • the cross-sectional shape perpendicular to the Z direction of the surface along the X direction and the Z direction in the connecting portion 12 of the stator 3c of the fifth modification 101c of the motor has an arc shape whose radius is the Y direction. Further, as shown in FIG. 18, when the angle formed by the center lines of the width in the X direction along the Y direction in the bridges 11 that are adjacent teeth portions is ⁇ , 0 ° ⁇ ⁇ 90 °. .
  • FIG. 19 is a perspective view of a stator of a motor of a second comparative example which is a comparison of the motor according to the present embodiment.
  • the cross-sectional shape perpendicular to the Z direction of the surfaces of the protrusion 19 and the back yoke 20 along the X direction and the Z direction of the stator 17 of the first comparative example 102 of the motor has the Y direction. It has an arc shape with a radius.
  • the width in the X direction of the protrusions 19 is directed in the Y direction which is the radial direction. It needs to grow radially. For this reason, there is a problem that the number of types of the shape of the magnetic steel sheet 18 is not one but plural.
  • the shape of the bridge 11 corresponding to the projection 19 of the stator 17 of the second comparative example 102a of the motor is radially directed in the Y direction. Even if it becomes the shape which spreads, the shape of the bridge 11, the connection part 12, and the slit 13 can be formed only by punching out the magnetic steel plate 9 once. In addition, it is possible to reduce the number of processing steps of the magnetic steel plate 9 and to reduce the number of parts. Therefore, as in the stator 3c of the fifth modification 101c of the motor according to the present embodiment, it is easy to manufacture in a curved surface where the shape of the surface of the connecting portion 12 along the X and Z directions is curved. Become. For this reason, it is easy to apply also to the application etc. to which mover 2 moves to curve shape.
  • the fifth modification 101c of the motor according to the present embodiment can reduce the number of parts and the number of processing steps without reducing the thrust characteristics such as torque and thrust as in the first embodiment. As a result, the assemblability can be improved.
  • the cross-sectional shape perpendicular to the Z direction of the surface of connecting portion 12 along the X direction and the Z direction is not limited to the arc shape of FIGS. It is also good.
  • FIG. 20 is a perspective view of a stator of a sixth modification of the motor in the third embodiment for implementing the present invention.
  • a sixth modification 101d of the motor is different from the motor 101 according to the first embodiment in the following point.
  • a welding portion 27 is provided in the connecting portion 12 of the stator 3d of the present embodiment.
  • a laminated core on which a plurality of magnetic steel plates 9 are laminated is fixed and integrated by a welding portion 27. That is, the magnetic resistance increase part of the connection part 12 is the welding part 27 which fastens the connection part 12 and the base part 10a by welding. Further, the laminated core and the base portion 10a are similarly fixed and integrated by the welding portion 27.
  • FIG. 21 is a view of a stator of a sixth modification of the motor in the present embodiment as viewed from the air gap side.
  • FIG. 22 is a cross-sectional view of a stator of a sixth modification of the motor according to the present embodiment, taken along line CC in FIG.
  • bolt holes 16a penetrating in the Z direction are provided on the surface of the base portion 10a on which the magnetic steel plate 9 is disposed.
  • the bolt hole portion 16a is provided in the region of the slit 13 not in contact with the magnetic steel plate 9 when viewed from FIG.
  • the base portion 10a is fastened to a device in which the sixth modification 101d of the motor is incorporated by the bolt hole portion 16a and a bolt not shown.
  • the stator 3 of the motor 101 according to the first embodiment includes the magnetic steel plate 9, the base portion 10, the bolt hole portion 15 provided in the magnetic steel plate 9 for integrating the device, and the bolt provided in the base portion 10. And a bolt 14 passing through the hole 16. For this reason, the head of the bolt 14 protrudes from the connecting portion 12 to the air gap G side. Therefore, the head of the bolt 14 may contact the mover 2 opposed to the stator 3. In addition, if the gap G is increased to avoid contact with the head of the bolt 14, there is a concern that the characteristics of the motor 101 may be degraded.
  • the head of the bolt 14 is separated from the connecting portion 12 by closing the magnetic steel plate 9 and the base portion 10a with the welding portion 27. It can suppress jumping out to the side.
  • the sixth modification 101d of the motor according to the present embodiment can reduce the number of parts and the number of processing steps without reducing the thrust characteristics such as torque and thrust as in the first embodiment. As a result, the assemblability can be improved.
  • a counterbore having a diameter larger than the bolt head so that the Z direction height of the bolt head is lower than the Z direction height of the surface to which the bridge 11 is attached in the base portion 10a Parts are provided. For this reason, it is possible to suppress the amount of the bolt head jumping out from the base portion 10a to the air gap G side. Also, even if the bolt head jumps out of the base portion 10a, the gap from the Z direction height of the bridge 11 can be obtained by making the Z direction height of the bridge 11 higher than the Z direction height of the bolt head jumped out. It is possible to prevent the bolt head from jumping out to the G side.
  • the connecting portion 12 is fixed by the welding portion 27.
  • the diameter of the welded portion 27 in the connecting portion 12 is smaller than the diameter of the bolt hole 15 by spot welding or the like.
  • the width Wa of the connecting portion 12 in the Y direction in the case of the welded portion 27 can be smaller than the width Wa of the connecting portion 12 in the direction of Y in the case of the bolt hole portion 15.
  • the usage-amount of the magnetic steel plate 9, ie, cost, can be reduced.
  • FIG. 23 is an exploded perspective view and a perspective view of a stator of a seventh modification of the motor in the fourth embodiment for implementing the present invention.
  • FIG. 24 is a cross-sectional view of a stator of a seventh modification of the motor according to the present embodiment, taken along a line DD in FIG.
  • FIG. 25 is a view of a stator of a seventh modification of the motor according to the present embodiment, as viewed from the air gap side.
  • the upper half of FIG. 23 shows an exploded perspective view of a stator 3e of a seventh modification 101e of the motor.
  • the lower half of FIG. 23 shows a perspective view of a stator 3e of a seventh modification 101e of the motor.
  • the seventh modification 101e of the motor is different from the motor 101 according to the first embodiment in the following point.
  • a caulking portion 31 is provided at the connecting portion 12 of the stator 3e of the seventh modification 101e of the motor according to the present embodiment. That is, the magnetic resistance increasing portion of the connecting portion 12 is a caulking portion 31 for fastening the connecting portion 12 and the base portion 10 b by caulking.
  • the term “crimping” refers to a method of fastening the magnetic steel plates 9 with each other by fitting the plastically deformed portions of the laminated magnetic steel plates 9 with each other.
  • the base part 10b is comprised with the magnetic steel plate 9b in which the slit 13 is not formed.
  • the magnetic steel plate 9a in which the slit 13 is formed is located on the air gap G side, and the magnetic steel plate 9b in which the slit 13 is not formed is the device side into which the seventh modification 101e of the motor is incorporated. It is located in In the magnetic steel plate 9b which is the base portion 10b, bolt holes 16b for fixing the base portion 10b and the device are provided. It is possible to fasten the base portion 10b to the device by passing a bolt (not shown) through the bolt hole portion 16b.
  • the laminated magnetic steel plates 9 are fixed and integrated by the bolts 14 or the welds 27.
  • the laminated magnetic steel plates 9 are integrated by the caulking portion 31.
  • the seventh modification 101e of the motor according to the present embodiment can reduce the number of parts and the number of processing steps without degrading the thrust characteristics such as torque and thrust as in the first embodiment. As a result, the assemblability can be improved.
  • the contact between the bolt 14 and the mover 2 and the expansion of the length of the air gap G in the Z direction can be suppressed in the first and second embodiments. And it becomes possible to reduce the man-hour of the manufacturing process required for the welding part 27 in Embodiment 3. Moreover, since the process of caulking can be automated using a sequential remittance die as a die for punching the magnetic steel plate 9, the assemblability of the stator 3e is improved. Furthermore, since the magnetic steel plate 9b in which the slit 13 is not formed is used as the base portion 10b, the same material of the magnetic steel plate can be used. Therefore, the reduction of the number of parts and the cost reduction can be realized.
  • FIG. 26 is a perspective view of a stator of an eighth modification of the motor in the fourth embodiment for practicing the present invention.
  • FIG. 27 is an enlarged view of a portion E shown in FIG. 26 when the stator of the motor in the present embodiment is viewed from the air gap side.
  • FIG. 28 is a perspective view showing a stator of a ninth modification of the motor in the fourth embodiment for carrying out the present invention.
  • FIG. 29 is an enlarged view showing a portion F shown in FIG. 28 when the stator of the ninth modified example of the motor according to the present embodiment is viewed from the air gap side.
  • the stator 3 which is a field includes a connecting part 12 made of a magnetic material.
  • a thin portion 32 having a width Wb in the Y direction smaller than the connecting portion width Wa is provided.
  • the width Wc obtained by subtracting the thin portion width Wb from the connecting portion width Wa is the width of the magnetic resistance increasing portion in the present embodiment. That is, when the width in the Y direction of the connecting portion 12 is Wa, and the width in the Y direction of the magnetic resistance increasing portion is Wc, Wa> Wc.
  • the bridge 11, the connection portion 12, and the thin portion 32 are formed by laminating the magnetic steel plates 9 in the Z direction.
  • the bridge 11, the connection part 12, and the thin part 32 may be integral.
  • the magnetic resistance increasing portion has a rectangular cross section, but as shown in FIGS. 28 and 29, the magnetic resistance increasing portion may have a semicircular cross section. Also, the magnetic resistance increasing portion may be triangular in cross section.
  • FIG. 30 is a perspective view of a stator of a tenth modification of the motor in the fifth embodiment for carrying out the present invention.
  • FIG. 31 is a view of a stator of a tenth modification of the motor in the present embodiment as viewed from the air gap side. As shown in FIGS. 30 and 31, the tenth modification 101f of the motor is different from the motor 101 according to the first embodiment in the following point.
  • a bridge front end slit 35 for separating one of the end portions in the Y direction from the connecting portion 12 is formed.
  • one of the one end and the other end of the bridge 11 in the Y direction is separated from the connecting portion 12 by the bridge tip slit 35 and is separated in the Y direction.
  • bridging-end slit 35 is arrange
  • the bridge tip slit 35 is disposed at a position where one end and the other end of the Y direction of the bridge 11 are alternately switched every two bridges 11 aligned in the X direction or every three bridges 11 aligned in the X direction. May be
  • the magnetic steel plate 9 and the base portion 10 are fixed by the bolt 14 through the bolt hole portion 15 of the connecting portion 12. That is, the magnetic resistance increasing portion is a bolt hole portion 15.
  • the magnetic resistance increasing portion may be the welded portion 27 of the third embodiment or the crimped portion 31 of the fourth embodiment.
  • the effect of the tenth modification 101f of the motor according to the present embodiment will be described.
  • the bolt holes 15, the welds 27, or the caulking portions 31 are provided in the connecting portion 12, and the width of the magnetic path of the connecting portion 12 becomes Wb. It is smaller than the width Wa in the Y direction. For this reason, the leakage magnetic flux which flows into the connection part 12 is reduced.
  • a bridge top slit 35 is formed at one of the one end and the other end of the bridge 11 in the Y direction.
  • the bridge 11 is separated from the connecting portion 12 in the Y direction.
  • the tenth modification 101f of the motor by providing the bridge top slit 35, the electrical resistance to the circulating current ic is increased. Therefore, the tenth modification 101f of the motor can reduce the loss due to the circulating current ic more than the motors 101 to 101e in the first to fourth embodiments.
  • the bridge front end slit 35 is formed at one of the one end and the other end of the bridge 11 in the Y direction.
  • the tenth modification 101f of the motor according to the present embodiment can reduce the number of parts and the number of processing steps without reducing thrust characteristics such as torque and thrust. As a result, the assemblability can be improved.
  • FIG. 32 is a perspective view of a stator of an eleventh modification of the motor in the sixth embodiment for implementing the present invention.
  • FIG. 33 is a view of a stator of an eleventh modification of the motor in the present embodiment as viewed from the air gap side. As shown in FIGS. 32 and 33, the eleventh modification of the motor is different from the motor 101 according to the first embodiment in the following point.
  • the slit 13 in the first embodiment is extended to the connecting portion 12 at one end in the Y direction, and the connecting portion 12 at one end in the Y direction of the slit 13 is not formed.
  • the connecting portions 12 at one end and the other end in the Y direction of the slits 13 is left.
  • the connecting portions 12 at one end and the other end of the slit 13 in the Y direction are arranged at alternately switched positions for each of the slits 13 aligned in the X direction.
  • connection part 12 of the one end and the other end in the Y direction of the slit 13 is arrange
  • all the connecting portions 12 may be disposed at one end or the other end of the slit 13 in the Y direction.
  • the connecting portion 12 is disposed at one end and the other end of the slit 13 in the Y direction.
  • the magnetic steel plate 9 and the base portion 10 are fixed by the bolt 14 passing through the bolt hole portion 15 of the connecting portion 12. That is, the magnetic resistance increasing portion is a bolt hole portion 15.
  • the magnetic resistance increasing portion may be the welded portion 27 of the third embodiment or the crimped portion 31 of the fourth embodiment.
  • the stator 3g has a shape without any one connecting portion 12 of the one end and the other end of the slit 13 in the Y direction. With this configuration, it is possible to increase the magnetic resistance to the magnetic flux flowing to the connection portion 12 more than the magnetic resistance of the motors 101 to 101 e in the first to fourth embodiments. Therefore, the eleventh modification 101g of the electric motor can reduce the leakage flux from the connecting portion 12 to the mover 2 more than the electric motors 101 to 101e in the first to fourth embodiments.
  • the stator 3g has a shape without the connecting portion 12 at either one end or the other end of the slit 13 in the Y direction, thereby increasing the electrical resistance to the circulating current ic Do. Therefore, the eleventh modification of the motor 101g can reduce the loss due to the circulating current ic more than the motors 101 to 101e in the first to fourth embodiments.
  • the stator 3g has a shape without the connecting portion 12 at one end of the slit 13 in the Y direction. With this configuration, the leakage magnetic flux and the circulating current ic can be further reduced as compared with Embodiments 1 to 4 as in the tenth modification 101f of the motor according to Embodiment 5.
  • one of the one end and the other end of the bridge 11 in the Y direction is separated from the connecting portion 12 and separated to separate the magnetic flux for the magnetic flux flowing through the bridge 11.
  • the resistance and the electrical resistance to the circulating current ic flowing in the bridge 11 are increased. Therefore, in the tenth modification 101f of the motor, the leakage flux and the circulating current are reduced.
  • one of the connecting portions 12 at one end and the other end of the slit 13 in the Y direction is fastened to the base portion 10 by a bolt or the like.
  • the strength of the bridge 11 is reduced.
  • the magnetic attraction force in the air gap G direction by the magnetic flux generated from the mover 2 acts on the bridge 11, so one end or the other end in the Y direction of the bridge 11 is The bridge 11 may be bent in the Z direction toward the mover 2 and interfere with the mover 2.
  • connection portions 12 connected to both ends of the bridge 11 in the Y direction are fixed to the base portion 10. Therefore, the strength of the bridge 11 in the eleventh modification 101g of the motor is improved as compared to the tenth modification 101f of the motor according to the fifth embodiment. Therefore, one end or the other end of the bridge 11 in the Y direction does not bend in the Z direction toward the mover 2, and the bridge 11 does not interfere with the mover 2.
  • the number of parts can be reduced and the number of processing steps can be reduced without reducing the thrust characteristics such as torque and thrust.
  • the assemblability can be improved.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Synchronous Machinery (AREA)
  • Linear Motors (AREA)

Abstract

La présente invention aborde le problème lié à l'obtention d'un moteur dans lequel les caractéristiques de poussée ne sont pas dégradées. Le présent moteur est pourvu d'un champ, et d'une armature qui fait face au champ, un entrefer les séparant, et qui se déplace par rapport au champ. Lorsque la direction dans laquelle l'armature se déplace par rapport au champ est la direction X, la direction dans laquelle l'armature fait face au champ est la direction Z, et une direction perpendiculaire aux directions X et Z est la direction Y, le champ comporte : une partie de base s'étendant dans la direction X et composée d'un corps magnétique ; une pluralité de parties dents faisant saillie à partir de la partie de base dans la direction Z, espacées dans la direction X, et composées d'un corps magnétique ; et des parties de liaison qui relient des parties d'extrémité respectives de deux parties dents se faisant face dans la direction X et qui sont composées de corps magnétiques, la résistance magnétique dans la direction X au niveau des parties de liaison étant supérieure à la résistance magnétique dans la direction Y au niveau des parties dents reliées par les parties de liaison.
PCT/JP2018/030865 2017-09-26 2018-08-21 Moteur et son procédé de fabrication WO2019065002A1 (fr)

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JP2018566616A JP6611966B2 (ja) 2017-09-26 2018-08-21 電動機およびその製造方法
KR1020207007788A KR102414864B1 (ko) 2017-09-26 2018-08-21 전동기 및 그 제조 방법
CN201880061144.4A CN111406361B (zh) 2017-09-26 2018-08-21 电动机及其制造方法
TW107133198A TWI665851B (zh) 2017-09-26 2018-09-20 電動機及其製造方法

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JP6742492B1 (ja) * 2019-11-19 2020-08-19 田中精密工業株式会社 積層鉄心の製造装置及びその製造方法

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JP2017005819A (ja) * 2015-06-05 2017-01-05 株式会社安川電機 リニアモータ及びリニアモータ製造方法
WO2017154576A1 (fr) * 2016-03-09 2017-09-14 三菱電機株式会社 Stator pour faire tourner un moteur électrique, et moteur électrique rotatif

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JP2007185033A (ja) * 2006-01-06 2007-07-19 Mitsubishi Electric Corp リニアモータ
EP1919063A1 (fr) * 2006-11-02 2008-05-07 Sy.Tra.Ma. S.R.L. Moteur linéaire à inversion du flux magnétique
JP5261080B2 (ja) * 2008-09-01 2013-08-14 三菱電機株式会社 リニアモータ
WO2010140534A1 (fr) * 2009-06-04 2010-12-09 三菱電機株式会社 Moteur linéaire
JP2011155757A (ja) * 2010-01-27 2011-08-11 Mitsubishi Electric Corp リニアモータ
CN102971948B (zh) * 2010-07-06 2015-07-22 三菱电机株式会社 线性电动机的电枢及线性电动机
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JP2014042423A (ja) * 2012-08-23 2014-03-06 Sanyo Denki Co Ltd リニアモータ
WO2014064785A1 (fr) * 2012-10-24 2014-05-01 株式会社日立製作所 Moteur linéaire, et système d'entraînement de celui-ci
JP6303284B2 (ja) * 2013-04-22 2018-04-04 日立金属株式会社 リニアモータ

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JPS6380757A (ja) * 1986-09-22 1988-04-11 Matsushita Electric Ind Co Ltd リニアモ−タ
JP2017005819A (ja) * 2015-06-05 2017-01-05 株式会社安川電機 リニアモータ及びリニアモータ製造方法
WO2017154576A1 (fr) * 2016-03-09 2017-09-14 三菱電機株式会社 Stator pour faire tourner un moteur électrique, et moteur électrique rotatif

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JP6611966B2 (ja) 2019-11-27
KR102414864B1 (ko) 2022-06-29
CN111406361B (zh) 2023-01-03
KR20200039777A (ko) 2020-04-16
TWI665851B (zh) 2019-07-11
CN111406361A (zh) 2020-07-10
TW201916550A (zh) 2019-04-16

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