KR101041737B1 - Slotless permanent magnet rotary machine - Google Patents

Slotless permanent magnet rotary machine Download PDF

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Publication number
KR101041737B1
KR101041737B1 KR1020100078502A KR20100078502A KR101041737B1 KR 101041737 B1 KR101041737 B1 KR 101041737B1 KR 1020100078502 A KR1020100078502 A KR 1020100078502A KR 20100078502 A KR20100078502 A KR 20100078502A KR 101041737 B1 KR101041737 B1 KR 101041737B1
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KR
South Korea
Prior art keywords
coil
permanent magnet
rotor
iron core
magnet rotating
Prior art date
Application number
KR1020100078502A
Other languages
Korean (ko)
Inventor
김형길
심민석
이종찬
Original Assignee
(주)설텍
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Filing date
Publication date
Application filed by (주)설텍 filed Critical (주)설텍
Priority to KR1020100078502A priority Critical patent/KR101041737B1/en
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Publication of KR101041737B1 publication Critical patent/KR101041737B1/en

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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • 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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

PURPOSE: A slotless permanent magnetic motor is provided to enhance a volume rate and a fill factor of coil winding and to optimally accept the intensity of a magnetic field by constituting division fence laminated core and coil assembly into one body. CONSTITUTION: A stator(110) consists of a ring type coil assembly where coil(120) is wound in a coil holder(112) and a ring type iron core(140) formed in a circumference of the coil assembly. A rotor(160) forms plural permanent magnets(190) at its circumference and is arranged inside the coil assembly. A housing(102) fixes stator to an inner wall and installs the rotor rotatably. A plurality of protrusions(114) open a coil holder up and down and is formed longitudinally in a outer sidewall. The coil consists of wires passing plurally among the protrusions. The core is an assembly formed by fitting plural arc sections and is arranged in an inner surface of the sidewall of a housing.

Description

Slotless Permanent Magnet Rotating Device {SLOTLESS PERMANENT MAGNET ROTARY MACHINE}

The present invention relates to a permanent magnet rotating device, and more particularly, by integrally forming a split iron core and a coil assembly, it is possible to increase the volume ratio and fill factor of the coil winding and to optimally accommodate the strength of the magnetic field. It relates to a permanent magnet rotating machine.

Permanent magnet rotating equipment refers to generators and motors with permanent magnets. In a conventional permanent magnet rotating machine, a coil of a stator is wound by forming a wire loop through a slot. At this time, each coil has a shape that corresponds closely to the shape of the slot.

In slot type rotary machines having a slot, cogging torque is caused by a change in magnetoresistance in the stator slot Tee as the rotor rotates as the rotor accommodating the permanent magnet rotates. Occurs. In order to solve such a problem, the development of the rotating machine (slotless rotating machine) which has a slotless structure has recently advanced. The slotless rotary machine can prevent the magnetic loss caused by the teeth of the slotted rotary machine. Slotless structures are often utilized to reduce the expensive cost of inserting coil windings into slots between teeth and teeth. Slotless rotary machines are also used in precision products to avoid other problems associated with the teeth of slotted rotary machines.

SUMMARY OF THE INVENTION An object of the present invention is to provide a permanent magnet rotating device capable of increasing the volume ratio and fill factor of a coil winding and optimally accommodating the magnetic field strength by integrally configuring a divided laminated iron core and a coil assembly.

Another object of the present invention is to provide a permanent magnet rotating device that can improve the heat dissipation performance by forming a wing pin or blade-shaped connection around the shaft of the rotor to generate air flow.

In order to achieve the above object of the present invention, a permanent magnet rotating device according to an aspect of the present invention includes a stator consisting of an annular coil assembly in which a coil is wound around a coil holder and an annular iron core around the coil assembly; And a rotor mounted inside the coil assembly with a plurality of permanent magnets mounted on an outer circumference thereof. The coil holder of the coil assembly is opened up and down, and a plurality of protrusions are formed along the longitudinal direction on the outer wall, and the coil is composed of coil windings passing through the protrusions a plurality of times.

In an embodiment of the present invention, the permanent magnet rotating device may further include a housing in which the stator is fixed to the inner wall and the rotor is rotatably mounted.

In this case, the iron core is an assembly configured by fitting a plurality of arc-shaped sections, it may be disposed on the inner surface of the side wall of the housing. Each arc-shaped section may be a stack of a plurality of arc-shaped iron plate pieces, and each arc-shaped iron plate piece may be formed with a groove having a protrusion formed at one end and a protrusion fitted at the other end.

In another embodiment of the present invention, the permanent magnet rotating device may further include a resin layer formed on the top and bottom of the iron core to attach the iron core to the coil holder.

In another embodiment of the invention, the rotor may comprise a yoke consisting of an inner and outer annular body and a plurality of connecting portions connecting the inner and outer annular bodies, and a shaft fitted to the inner annular body of the yoke.

In this case, the connecting portion may be a wing pin or a blade having an inclined surface inclined with respect to the axial direction to cause air flow along the axial direction of the rotor.

The permanent magnet rotating device described above may be a generator or a motor.

As described above, the permanent magnet rotating device according to the embodiment of the present invention may be configured to integrate the split laminated core and the coil assembly to increase the volume ratio (winding share) of the coil winding and to optimally accommodate the strength of the magnetic field. . In particular, the winding occupancy ratio can be increased by arranging the coils in the shaped coil holders and wrapping the coils with a coating (endothelium / sheath) having excellent electrical insulation properties.

In addition, it is possible to improve the heat dissipation performance by forming a wing pin or blade-shaped connection around the shaft of the rotor to generate air flow.

1 is a cross-sectional view of a slotless permanent magnet rotating machine according to an embodiment of the present invention.
2 is an exploded view of the permanent magnet rotating apparatus of FIG.
3 is a plan view of the stator and housing sidewall of FIG.
4 is a plan view and a cross-sectional view of the coil assembly of FIG.
5 is a perspective view of the coil holder of FIG. 4.
6 is a plan view and a cross-sectional view of the split iron core of FIG. 1.
7 is a perspective view of the arc section of the split iron core of FIG. 6.
8 is a plan view of the rotor of FIG. 1.
9 is a cross-sectional view of the rotor of FIG. 8.
10 is a plan view and a cross-sectional view of the rotor yoke of FIG. 8.

Hereinafter, an embodiment of a permanent magnet rotating apparatus according to the present invention with reference to the accompanying drawings.

1 is a cross-sectional view of a slotless permanent magnet rotating device 100 according to an embodiment of the present invention, Figure 2 is an exploded view of the permanent magnet rotating device 100 of FIG.

As shown in Figures 1 and 2, the permanent magnet rotating apparatus 100 according to an embodiment of the present invention includes a housing 102 and a stator 110 and a rotor 160 disposed therein.

The housing 102 has a top plate 104a, a bottom plate 104b, and side walls 102 joined by screws or the like to form a unitary structure. Of course, one of the upper plate 104a and the lower plate 104b may be integrally formed with the side wall 102.

3 is a plan view of the side wall 104c of the stator 110 and the housing 102 of FIG. 1.

Referring to FIG. 3 together with FIGS. 1 and 2 above, the stator 110 is fixedly mounted to an inner surface of the side wall 102 of the housing 102. The stator 110 includes a coil assembly composed of an annular coil holder 112 and a coil 120, and a split iron core 140 coupled around it.

The coil holder 112 is opened up and down to form a plurality of protrusions 114 along the longitudinal direction on the outer wall, the coil 120 is formed by passing a plurality of wires between the protrusions 114.

On the other hand, the outer periphery of the housing side wall 104c is formed with a screw groove (Hb) for screw defects and the top plate (104a).

4 is a plan view and a cross-sectional view of the coil assembly of FIG. 1, and FIG. 5 is a perspective view of the coil holder 112 of FIG. 4.

As shown in Figs. 4 and 5, the coil holder 112 is a cylinder having a vertical space open and a cylindrical space 118 therein, the projection 114 is formed on the outer periphery and the concave wire between the projections Part 116 is formed. As can be seen from part (a) of FIG. 4, a wire passes through a plurality of times in each wire receiving portion 116 to form a coil 120.

The coil holder 112 is shaped according to the width and the number of poles of the permanent magnet 190 of the rotor 160 to be described later. That is, the width of the wire receiving portion 116 is designed according to the width and the number of poles of the permanent magnet 190 of the rotor 160. The length of the wire receiving portion 116 is designed to be larger than the length of the permanent magnet 190. The material of the coil holder 112 uses a resin having mechanical toughness without being deformed by heat radiation.

Each coil 120 aligned with the wire receptacle 116 of the divided and shaped holder 112 is wound around an endothelial 130 in the form of a crimp band, wound around the coil 120 and the coil holder protrusion 114. Sheath 132 is wrapped to assemble them into one. The inner shell 130 and the outer shell 132 are made of an electrically insulating material. The outer shell 130 and the inner shell 132 are made of a thin layer having high electrical insulation while being tough to press the coil 120 from the outside to increase the number of turns of the coil 120.

As such, the coil 120 is arranged in the wire receiving portion 116 of the shaped holder 112, the inner layer 130 and / or the outer skin (thin layer) excellent electrical insulation properties to increase the coil occupancy (volume) 132 surrounds the coil 120.

Meanwhile, although only one coil 120 is formed in one wire receiving part 116 in FIG. 4, this is for convenience of illustration. In this embodiment, the coil 120 is formed in all the wire receivers 116.

FIG. 6 is a plan view and a cross-sectional view of the split iron core 140 of FIG. 1, and FIG. 7 is a perspective view of the arc section 142 of the split iron core 140 of FIG. 6.

Referring to FIGS. 6 and 7 together with FIGS. 1 through 3, the split iron core 140 is disposed around the coil assembly and mounted to the inner surface of the sidewall 104c of the housing 102. At this time, the resin layer 150 is formed at the top and the bottom of the split iron core 140 and the coil assembly so as to tightly couple the split iron core 140. The resin layer 150 may be made of a specific resin that can enhance the bonding strength and mechanical toughness of the coil assembly and the iron core 140. The resin layer 150 has an effect of reinforcing the dielectric strength of the coil 120 and may prevent damage and breakage due to external exposure. The resin layer 150 may also function to fix the split iron core 140 to the housing sidewall 104c.

It is preferable that the resin of the resin layer 150 has excellent electrical insulation, mechanical toughness and heat resistance. After applying the resin to the coil assembly and the iron core 140, the desired characteristics can be obtained by removing the air of the resin in a vacuum and curing the resin in a heating furnace.

6 and 7, the split iron core 140 is composed of a plurality of arc-shaped sections 142 fitted to each other. That is, each arc section 142 is coupled to the other end of the arc section 142 adjacent to one end, thereby forming an annular split iron core 140 having a cylindrical space 148 therein.

As specifically shown in FIG. 7, the arc-shaped section 142 may be formed of a stack of a plurality of arc-shaped iron plate pieces 142a. The arc-shaped section 142 may simply be a laminate of these arc-shaped iron plate pieces 142a, or may be one in which the arc-shaped iron plate pieces 142a of the laminate are integrally bonded by spot welding or the like.

A protrusion 144 is formed at one end of the arc-shaped iron plate piece 142a, and a groove 146 having a shape corresponding to the protrusion 144 is formed at the other end. That is, the groove 146 is configured such that the protrusion 144 is fitted.

As a result, each arc-shaped iron plate piece 142a is connected to the annular piece by fitting one end of the protrusion 144 into the groove 146 at the other end of the adjacent arc-shaped iron plate piece. The annular iron core 140 of the present embodiment can be obtained by laminating such annular iron pieces.

When the split iron core 140 configured as described above is coupled to the coil assembly, the number of turns of the coil 120 may be increased. Therefore, it is possible to increase the volume ratio or fill factor of the coil winding and to optimally accommodate the strength of the magnetic field of the permanent magnet.

In addition, the manufacturing process of the slotless permanent magnet rotating apparatus 100 can be significantly simplified. That is, the coil 120 is wound around the coil holder 112 to form a coil assembly, and then the split type iron core 140 is wrapped around the coil assembly and assembled to wrap the wire around the teeth of the slotted iron core. The manufacturing process is significantly simplified compared with the conventional configuration for forming the coil.

On the other hand, although not shown, in order to reinforce the bonding strength and mechanical toughness of the coil assembly and the iron core 140, a specific resin layer may be added to the coil assembly to assemble the split iron core 140. The resin layer has an effect of reinforcing the insulation strength of the coil 120 and can prevent damage and breakage due to external exposure.

8 is a plan view of the rotor 160 of FIG. 1, FIG. 9 is a cross-sectional view of the rotor 160 of FIG. 8, and FIG. 10 is a plan view and a cross-sectional view of the rotor yoke 170 of FIG. 8.

As shown in FIGS. 8 to 10, the rotor 160 is configured by coupling the shaft 162 to the fastening hole 184 of the yoke 170.

Specifically, the yoke 170 is composed of inner and outer annular bodies 172 and 174 and a plurality of connection portions 180 connecting the inner and outer annular bodies 172 and 174. As shown in FIG. 10, the inner annular body 172 has a coupling hole 184 formed therein, and the shaft 162 is fitted into the coupling hole 184.

In addition, the connection portion 180 is formed in a blade shape, and some blades have an inclined surface 182 having a predetermined inclination with respect to the axial direction to cause air flow along the axial direction of the rotor 110. Of course, it is also possible to form inclined surfaces on the entire blade. In this configuration, even if a separate fan is not attached to the shaft of the rotor 110, a heat dissipation effect can be obtained by the air flow generated by the inclined surface 182 of the connection unit 180.

At an upper end (or lower end) of the outer annular body 174, a protrusion 176 for positioning and aligning the permanent magnet 190 is formed by a step.

At this time, the length and thickness of the permanent magnet 190 mounted on the yoke 170 is designed to suit the size of the output, and the N pole and the S pole are alternately arranged and mounted on the yoke 170. The number of poles of a permanent magnet depends on the application, and the pole distance of one permanent magnet is 180 ° magnetically or electrically.

On the other hand, the interval of the coil 120 corresponding to the permanent magnet is determined by, for example, the width of the permanent magnet accommodated by one of the coils of the three-phase coil. In order to minimize the winding volume of the coil, the length of the end windings of the coil or the shape angle of the coil that does not effectively receive the permanent magnet is determined according to the length and shape of the permanent magnet.

On the other hand, as shown in Figures 1 and 2, the shaft 162 is coupled to the upper plate 104a and the lower plate 104b of the housing 102 via the bearing 106, so that the rotor 160 is a housing ( 102 is rotatably mounted.

Although not shown, when assembling the stator 110 and the rotor 160, the output line and the temperature sensor may be placed in the proper position of the housing 102. In addition, a rubber ring or seal having waterproof capability can be inserted into the housing 102 to be waterproofed, or the output line can be waterproofed with a rubber ring or seal.

The slotless permanent magnet rotating device 100 of the present embodiment configured as described above can be used as a generator or a motor.

100: slotless permanent magnet rotating device 102: housing
110: fixed 112: coil holder
120: coil 130: inner shell
132: jacket 140: split iron
142: arc section 150: resin
160: rotor 162: sharp
170: York 182: slope
190: permanent magnet

Claims (9)

A stator 110 including an annular coil assembly having a coil 120 wound around the coil holder 112 and an annular iron core 140 around the coil assembly;
A rotor (160) mounted on an outer circumference thereof and disposed in the coil assembly; And
A housing 102 in which the stator is fixed to an inner wall and the rotor is rotatably mounted
Including;
The coil holder of the coil assembly is opened up and down, a plurality of protrusions 114 are formed in the outer wall along the longitudinal direction, the coil is made of a wire passing through the protrusions a plurality of times,
The iron core is an assembly formed by fitting a plurality of arc-shaped sections 142, and is disposed on the inner surface of the side wall 104c of the housing 102,
Wherein each arc section is a stack of a plurality of arc plate pieces (142a).
delete delete delete The permanent magnet rotating machine according to claim 1, wherein each arc-shaped iron plate piece is provided with a protrusion (144) at one end and a groove (146) at which the protrusion is fitted at the other end.
The permanent magnet rotating device of claim 1, further comprising a resin layer (150) formed at an upper end and a lower end of the iron core to attach the iron core to the coil holder.
2. The permanent magnet rotating machine according to claim 1, wherein the rotor includes a yoke composed of a plurality of connecting portions connecting the inner and outer annular bodies and the inner and outer annular bodies, and a shaft fitted to the inner annular body of the yoke. .
8. The permanent magnet rotating machine according to claim 7, wherein the connecting portion is a wing pin or a blade having an inclined surface inclined with respect to the axial direction to cause air flow along the axial direction of the rotor.
The permanent magnet rotating device according to any one of claims 1 to 5, wherein the permanent magnet rotating device is a generator or a motor.
KR1020100078502A 2010-08-13 2010-08-13 Slotless permanent magnet rotary machine KR101041737B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100078502A KR101041737B1 (en) 2010-08-13 2010-08-13 Slotless permanent magnet rotary machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100078502A KR101041737B1 (en) 2010-08-13 2010-08-13 Slotless permanent magnet rotary machine

Publications (1)

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KR101041737B1 true KR101041737B1 (en) 2011-06-16

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101281537B1 (en) 2012-03-26 2013-07-03 정현태 Structure and assembling method of out-rotor type vertical axis wind power generator
KR102065267B1 (en) * 2018-08-10 2020-01-10 한양대학교 산학협력단 A stator for coreless motor manufactured using 3D printing and coreless motor including the stator
KR20220016558A (en) * 2020-08-03 2022-02-10 재연 성 Aluminum prefabricated cover structure for handrail heating
CN117833531A (en) * 2024-03-05 2024-04-05 浙江大学 Slotless motor coil framework

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020046620A (en) * 2000-12-15 2002-06-21 김준 Fabrication Method of Stator Assembly Using Slotless Stator Core on Brushless DC Motor and Brushless DC Motor Thereby
KR20040009793A (en) * 2002-07-25 2004-01-31 한국기계연구원 Motor with dual section type stator
KR20070040913A (en) * 2005-10-13 2007-04-18 엘지이노텍 주식회사 Stator of motor
KR20100035068A (en) * 2008-09-25 2010-04-02 뉴모텍(주) Fan motor for refrigerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020046620A (en) * 2000-12-15 2002-06-21 김준 Fabrication Method of Stator Assembly Using Slotless Stator Core on Brushless DC Motor and Brushless DC Motor Thereby
KR20040009793A (en) * 2002-07-25 2004-01-31 한국기계연구원 Motor with dual section type stator
KR20070040913A (en) * 2005-10-13 2007-04-18 엘지이노텍 주식회사 Stator of motor
KR20100035068A (en) * 2008-09-25 2010-04-02 뉴모텍(주) Fan motor for refrigerator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101281537B1 (en) 2012-03-26 2013-07-03 정현태 Structure and assembling method of out-rotor type vertical axis wind power generator
KR102065267B1 (en) * 2018-08-10 2020-01-10 한양대학교 산학협력단 A stator for coreless motor manufactured using 3D printing and coreless motor including the stator
KR20220016558A (en) * 2020-08-03 2022-02-10 재연 성 Aluminum prefabricated cover structure for handrail heating
KR102366220B1 (en) * 2020-08-03 2022-02-22 성재연 Aluminum prefabricated cover structure for handrail heating
CN117833531A (en) * 2024-03-05 2024-04-05 浙江大学 Slotless motor coil framework
CN117833531B (en) * 2024-03-05 2024-05-24 浙江大学 Slotless motor coil framework

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