United States Patent [19J United States Patent [19]
`
`
`Hsu Hsu
`
`
`
`111111 111111
`
`
`1111111111111111111111111111111111111111111111111111111111111 1111111111111111111111111111111111111111111111111111111111111
`
`US006081059A US006081059A
`
`[11] Patent Number: [11] Patent Number:
`
`[45] Date of Patent: [45] Date of Patent:
`
`
`6,081,059 6,081,059
`Jun. 27,2000
`Jun.27,2000
`
`
`[54] OUTER-ROTOR ELECTRIC MOTOR [54] OUTER-ROTOR ELECTRIC MOTOR
`HAVING INNER-STATOR FORMED BY
`HAVING INNER-STATOR FORMED BY
`CONCENTRICALLY WRAPPING
`CONCENTRICALLY WRAPPING
`FLATTENED STATOR ELEMENTS ON
`FLATTENED STATOR ELEMENTS ON
`STATOR CORE
`STATOR CORE
`
`[76]
`[76]
`
`Inventor: Chun-Pu Hsu, 19, Wu-Chien Sixth
`Inventor: Chun-Pu Hsu, 19, Wu-Chien Sixth
`
`Road, Wu-Ku Industrial Park, Wu-Ku, Road, Wu-Ku Industrial Park, Wu-Ku,
`
`Taipei Hsien, Taiwan Taipei Hsien, Taiwan
`
`[21] Appl. No.: 09/296,691
`[21] Appl. No.: 09/296,691
`
`[22] Filed:
`[22] Filed:
`
`Apr. 21, 1999
`Apr. 21, 1999
`
`Int. Cl? ............................. H02K l/12; H02K 15/02
`Int. CI? ............................. H02K 1/12; H02K 15/02
`[51]
`[51]
`[52] U.S. Cl. .......................... 310/179; 310/216; 310/218;
`[52] U.S. CI. .......................... 310/179; 310/216; 310/218;
`310/259; 310/269; 29/596; 29/597; 29/598
`310/259; 310/269; 29/596; 29/597; 29/598
`[58] Field of Search ..................................... 310/254, 259,
`[58] Field of Search ..................................... 310/254,259,
`310/41, 216, 218, 269, 156, 194; 29/596,
`310/41,216,218,269, 156, 194; 29/596,
`597, 598, 609, 605
`597, 598, 609, 605
`
`[56]
`[56]
`
`References Cited
`References Cited
`
`
`
`U.S. PATENT DOCUMENTS U.S. PATENT DOCUMENTS
`
`
`3,577,851 3,577,851
`
`3,886,256 3,886,256
`
`4,102,040 4,102,040
`
`
`5/1971 Detheridge ................................ 29!596 5/1971 Detheridge ................................ 29/596
`5/1975 Ohuchi et al. .......................... 310/216
`5/1975 Ohuchi et a!. .......................... 310/216
`7/1978 Rich .......................................... 29/598
`7/1978 Rich .......................................... 29/598
`
`
`4,350,914 4,350,914
`
`4,395,815 4,395,815
`
`4,712,035 4,712,035
`
`4,818,911 4,818,911
`
`5,642,011 5,642,011
`
`
`9/1982 Searle . ... .... ... ... ... ... ... .... ... ... ... .. 310/194 9/1982 Searle. ... .... ... ... ... ... ... .... ... ... ..... 310/194
`
`8/1983 Stanley et a!. ............................ 29/598 8/1983 Stanley et al. ............................ 29/598
`12/1987 Forbes et a!. ........................... 310/269 12/1987 Forbes et al. ........................... 310/269
`
`
`4/1989 Taguchi et a!. ... ... .... ... ... ... ... ... 310/259 4/1989 Taguchi et al. ... ... .... ... ... ... ... ... 310/259
`6/1997 Fanning et a!. ......................... 310/216 6/1997 Fanning et al. ......................... 310/216
`
`
`
`Primary Examiner-Nestor Ramirez Primary Examiner---Nestor Ramirez
`
`Assistant Examiner-Tran N Nguyen Assistant Examiner-Tran N Nguyen
`
`
`
`[57] [57]
`
`ABSTRACT
`ABSTRACT
`
`
`An electric motor of outer-rotor type includes: an inner An electric motor of outer-rotor type includes: an inner
`
`stator mounted on a stator holder, an outer rotor rotatably stator mounted on a stator holder, an outer rotor rotatably
`
`circumferentially disposed around the inner stator, a shaft circumferentially disposed around the inner stator, a shaft
`
`coaxially secured with the outer rotor, and a housing com(cid:173)coaxially secured with the outer rotor, and a housing com(cid:173)
`
`bined with the stator holder for encasing the outer rotor and bined with the stator holder for encasing the outer rotor and
`
`the inner stator within the housing; with the inner stator the inner stator within the housing; with the inner stator
`
`including an annular core made of magnetic conductor, a including an annular core made of magnetic conductor, a
`
`plurality of fin arrays made of magnetic conductors and plurality of fin arrays made of magnetic conductors and
`
`formed as a fin array assembly concentrically wrapped on formed as a fin array assembly concentrically wrapped on
`
`the annular core, and a plurality of insulating coil bobbins the annular core, and a plurality of insulating coil bobbins
`
`each coil bobbin pre-wound with the coil windings thereon each coil bobbin pre-wound with the coil windings thereon
`
`and jacketed on each fin array, thereby forming an inner and jacketed on each fin array, thereby forming an inner
`
`stator having a stable construction, a higher winding stator having a stable construction, a higher winding
`
`capacity, higher magnetic flux density and higher output capacity, higher magnetic flux density and higher output
`
`power, as well as a lower production cost. power, as well as a lower production cost.
`
`11 Claims, 8 Drawing Sheets
`11 Claims, 8 Drawing Sheets
`
`110A
`
`F
`F
`
`x .~
`X ·~
`
`Page 1 of 13
`
`PETITIONERS' EXHIBIT 1022
`
`

`

`u.s. Patent
`U.S. Patent
`
`Jun. 27,2000
`Jun.27,2000
`
`Sheet 1 of 8
`Sheet 1 of 8
`
`6,081,059
`6,081,059
`
`
`
`52 52
`
`
`
`5 5
`
`
`51 51
`so
`so
`
`40
`40
`
`1
`
`1'--
`I
`
`1
`
`
`
`2 2
`
`21
`
`34
`
`FIG.1
`FIG. 1
`
`Page 2 of 13
`
`

`

`u.s. Patent
`U.S. Patent
`
`Jun.27,2000
`Jun. 27,2000
`
`Sheet 2 of 8
`Sheet 2 of 8
`
`6,081,059
`6,081,059
`
`110A
`110A
`
`11
`
`"
`
`
`
`) )
`
`X
`X
`Ll
`L1
`
`143 143
`
`141 141
`
`142 142
`
`FIG.2
`FlG.2
`
`Page 3 of 13
`
`

`

`/
`
`11
`
`-
`
`113
`113
`
`111
`
`110A
`110A
`A
`
`- - -
`
`114 113 11
`
`~
`
`-
`
`-
`
`-
`-
`
`-
`
`-
`
`-=
`
`....
`
`11
`
`...:
`-
`
`.:
`-
`
`-=
`
`142
`
`--v-
`v-
`14A
`14A
`
`FIG.3
`FIG. 3
`
`
`
`F F
`
`143
`143
`
`---'"'
`___ . /
`
`11
`11
`
`d • d •
`
`rJl
`\Jl
`•
`•
`
`~ ~
`~ .....
`~ ......
`~ = ......
`=
`~
`.....
`
`~ = ? ?
`~ =
`
`N
`N
`
`~-..J ~-..J
`N
`N c c c
`c c
`c
`
`'JJ. =(cid:173)~ 'JJ. =-~
`
`
`~ ..... ~ .....
`
`~ ~
`....,
`0
`0 ......,
`
`00 00
`
`112
`
`14 143
`i41t
`l1
`12
`
`142
`1l.2
`
`
`
`FIG. 4 FIG. 4
`
`114
`114
`
`
`
`FIG. 5 FIG. 5
`
`0\
`
`.... = 00
`~ .... = Ul
`
`\C
`
`Page 4 of 13
`
`

`

`u.s. Patent
`U.S. Patent
`
`
`
`Jun.27,2000 Jun. 27,2000
`
`
`
`Sheet 4 of 8 Sheet 4 of 8
`
`6,081,059
`6,081,059
`
`11
`"
`
`
`
`14 14
`
`X
`114
`~-144
`
`114
`'14
`
`,,
`
`11
`
`111
`
`113
`
`112
`"2
`
`
`
`145 145
`
`
`
`114 114
`
`
`
`144 144
`
`
`
`FIG. 6 FIG.6
`
`Page 5 of 13
`
`

`

`u.s. Patent
`U.S. Patent
`
`
`
`Jun.27,2000 Jun. 27,2000
`
`
`
`Sheet 5 of 8 Sheet 5 of 8
`
`
`
`6,081,059 6,081,059
`
`
`
`F' F'
`
`
`14 14
`~43 142
`~43 142
`
`FIG.8~ FIG.8~
`
`F
`F
`
`Page 6 of 13
`
`

`

`u.s. Patent
`U.S. Patent
`
`
`
`Jun.27,2000 Jun. 27,2000
`
`Sheet 6 of 8
`Sheet 6 of 8
`
`6,081,059
`6,081,059
`
`22
`
`\
`
`-
`
`I
`
`I~I
`I~I
`'I
`~1
`
`I
`I
`
`2
`2
`
`
`
`13 13
`
`52
`
`---
`~
`~
`-~
`
`5
`5
`
`-
`-
`
`-
`-
`
`~
`~
`~
`-
`
`-
`~
`~
`-
`~
`~
`
`~ ~ -
`
`~ ~
`
`~ ~
`
`~ ~
`~
`~
`
`~ ~
`~
`~
`~
`~
`
`~ ~
`""-
`'-..._
`
`-
`-
`
`51
`
`-
`-
`
`--
`
`
`~ ~
`
`~ ~
`~
`~
`
`~ ~
`~
`~
`~
`~
`~
`~
`' ....
`"-....
`
`~
`
`4
`
`41
`
`
`
`FIG.9 FIG.9
`
`Page 7 of 13
`
`

`

`u.s. Patent
`U.S. Patent
`
`
`
`Jun.27,2000 JUll.27,2000
`
`
`
`Sheet 7 of 8 Sheet 7 of 8
`
`6,081,059
`6,081,059
`
`11 10J 16 21
`11 10J 16 21
`12
`12
`
`
`14 14
`FiG. 10
`Fi G. 10
`
`13
`13
`
`30
`30
`
`3
`
`x
`
`16
`16
`
`10
`10
`
`11 11
`
`100
`
`FIG. 11
`FI G. 11
`
`FIG. 12
`FIG.12
`
`Page 8 of 13
`
`

`

`u.s. Patent
`U.S. Patent
`
`
`
`Jun.27,2000 JUll.27,2000
`
`
`
`Sheet 8 of 8 Sheet 8 of 8
`
`6,081,059
`6,081,059
`
`
`
`13 13
`
`
`I ""'t--r \ 't--r
`,
`,
`I
`'
`'
`I
`
`12
`12
`
`I I
`
`141 141
`14f ~43( ?/ (5
`14f ~43( ?/ rS
`
`I I I I I I
`
`I !
`,r
`, r
`
`
`I ( I (
`,
`,
`
`30
`30
`
`I I
`
`31
`31
`
`\ \
`
`I
`\
`I
`\
`, 22
`\ 22
`2
`2
`
`/ i !
`!
`(
`I
`14
`11 1
`14
`11 1
`
`
`\ \
`21
`21
`
`FIG. 13 FI G. 13
`
`r, A
`T1 A
`
`
`
`) )
`
`12
`12
`
`15
`15
`I
`/
`
`
`
`16a 16a
`
`4
`
`
`
`113 113
`
`11
`11
`
`112
`'12
`
`10 10
`
`FIG.14 B FIG.14
`
`FI G. 15
`FIG. 15
`
`PRIOR ART PRIOR ART
`
`w
`
`Page 9 of 13
`
`

`

`
`1 1
`
`OUTER-ROTOR ELECTRIC MOTOR OUTER-ROTOR ELECTRIC MOTOR
`
`HAVING INNER-STATOR FORMED BY HAVING INNER-STATOR FORMED BY
`
`CONCENTRICALLY WRAPPING CONCENTRICALLY WRAPPING
`
`FLATTENED STATOR ELEMENTS ON FLATTENED STATOR ELEMENTS ON
`
`STATOR CORE STATOR CORE
`
`
`
`BACKGROUND OF THE INVENTION BACKGROUND OF THE INVENTION
`
`
`
`6,081,059 6,081,059
`
`
`
`5 5
`
`
`2 2
`
`FIG. 4 is a sectional drawing of the hinge portion of the FIG. 4 is a sectional drawing of the hinge portion of the
`
`two linked bobbins. two linked bobbins.
`
`FIG. 5 is a sectional drawing of the hinge portion of the FIG. 5 is a sectional drawing of the hinge portion of the
`
`two linked fin members. two linked fin members.
`
`FIG. 6 is a cross sectional drawing of the fin array FIG. 6 is a cross sectional drawing of the fin array
`
`assembly and coil bobbin assembly when annularly assembly and coil bobbin assembly when annularly
`
`assembled. assembled.
`
`FIG. 7 is a perspective view of the inner stator as FIG. 7 is a perspective view of the inner stator as
`exploded.
`10 exploded.
`10
`FIG. 8 is an illustration of the inner stator as assembled. FIG. 8 is an illustration of the inner stator as assembled.
`
`
`FIG. 9 is a perspective view of the electric motor of this FIG. 9 is a perspective view of the electric motor of this
`
`invention. invention.
`
`FIG. 10 is a longitudinal sectional drawing of the present FIG. 10 is a longitudinal sectional drawing of the present
`
`15 invention. 15 invention.
`
`FIG. 11 is a cross sectional drawing of the present FIG. 11 is a cross sectional drawing of the present
`
`invention as viewed from 11-11 direction of FIG. 10. invention as viewed from 11-11 direction of FIG. 10.
`
`FIG. 12 is a cross sectional drawing of the present FIG. 12 is a cross sectional drawing of the present
`invention as viewed from 12-12 direction of FIG. 10.
`20 invention as viewed from 12-12 direction of FIG. 10.
`20
`
`FIG. 13 is a longitudinal sectional drawing of another FIG. 13 is a longitudinal sectional drawing of another
`
`preferred embodiment of the present invention. preferred embodiment of the present invention.
`
`FIG. 14 shows another embodiment of the core and the fin FIG. 14 shows another embodiment of the core and the fin
`
`member of this invention. member of this invention.
`
`FIG. 15 shows a conventional electric motor with outer FIG. 15 shows a conventional electric motor with outer
`
`rotor. rotor.
`
`
`
`DETAILED DESCRIPTION DETAILED DESCRIPTION
`
`
`A conventional electric motor, such as disclosed in a A conventional electric motor, such as disclosed in a
`
`Japanese invention patent application publication (Laid(cid:173)Japanese invention patent application publication (Laid(cid:173)
`
`open) No. 6-351185 (copy enclosed) as illustrated in FIG.15 open) No. 6-351185 (copy enclosed) as illustrated in FIG. 15
`
`of this application, includes: an inner stator S secured on a of this application, includes: an inner stator S secured on a
`
`base B, a plurality of tooth member sets T radially secured base B, a plurality of tooth member sets T radially secured
`
`to an annular yoke Y having coil windings W wound on each to an annular yoke Y having coil windings W wound on each
`
`tooth member set T and limited between two stopping tooth member set T and limited between two stopping
`
`fasteners Fr clamped on the tooth member set T, and an outer fasteners Fr clamped on the tooth member set T, and an outer
`
`rotor R having magnets M secured thereon rotatably cir(cid:173)rotor R having magnets M secured thereon rotatably cir(cid:173)
`
`cumferentially disposed around the inner stator S having a cumferentially disposed around the inner stator S having a
`shaft A coaxially secured to the outer rotor R.
`shaft A coaxially secured to the outer rotor R.
`
`However, such a conventional outer-rotor type electric However, such a conventional outer-rotor type electric
`
`motor has the following drawbacks: motor has the following drawbacks:
`1. Each tooth member set T includes plural tooth members
`1. Each tooth member set T includes plural tooth members
`clamped by an inner and an outer stopping fastener Fr for
`clamped by an inner and an outer stopping fastener Fr for
`limiting the coil windings W as wound on the tooth
`limiting the coil windings W as wound on the tooth
`members, thereby reducing the winding area and decreas- 25
`members, thereby reducing the winding area and decreas- 25
`
`ing the coil windings on the stator and decreasing the ing the coil windings on the stator and decreasing the
`
`torque output from such an electric motor. torque output from such an electric motor.
`
`2. Each tooth member has only an inner lug T1 insertably 2. Each tooth member has only an inner lug T1 insertably
`
`fixed in the annular yoke Y, leaving the outer portion of fixed in the annular yoke Y, leaving the outer portion of
`the tooth member unstably suspending (without being 30 the tooth member unstably suspending (without being 30
`
`
`supported) in the air to thereby easily cause vibrational supported) in the air to thereby easily cause vibrational
`
`shock or influence the magnetic fields between the stator shock or influence the magnetic fields between the stator
`
`and the rotor. and the rotor.
`
`3. Due to the unstable structure and assembly complexity 3. Due to the unstable structure and assembly complexity
`
`when making the inner stator of such a conventional when making the inner stator of such a conventional
`
`motor, it is merely suitable for making a "thin" or "fiat" motor, it is merely suitable for making a "thin" or "flat"
`
`miniature motor, unable for producing a motor of higher miniature motor, unable for producing a motor of higher
`
`torque output. torque output.
`
`The present inventor has found the drawbacks of the The present inventor has found the drawbacks of the
`conventional electric motor and invented the present motor 40 conventional electric motor and invented the present motor 40
`
`
`having higher torque output and efficiency. having higher torque output and efficiency.
`
`
`As shown in FIGS. 1-12, the present invention com-As shown in FIGS. 1-12, the present invention com-
`
`prises: an inner stator 1, a stator holder 2 for mounting the prises: an inner stator 1, a stator holder 2 for mounting the
`
`inner stator 1 thereon, an outer rotor 3 rotatably circumfer(cid:173)inner stator 1 thereon, an outer rotor 3 rotatably circumfer(cid:173)
`
`entially disposed around the inner stator 1, a shaft 4 coaxi(cid:173)entially disposed around the inner stator 1, a shaft 4 coaxi(cid:173)
`
`ally secured with the outer rotor 3 about a longitudinal axis ally secured with the outer rotor 3 about a longitudinal axis
`
`X defined at a longitudinal center of the stator holder 2, and 35 X defined at a longitudinal center of the stator holder 2, and
`35
`
`a housing 5 combined with the stator holder 2 for encasing a housing 5 combined with the stator holder 2 for encasing
`
`the outer rotor 3 and the inner stator 1 within the housing 5 the outer rotor 3 and the inner stator 1 within the housing 5
`
`and the holder 2. The housing 5 may also be eliminated in and the holder 2. The housing 5 may also be eliminated in
`
`this invention. this invention.
`
`The stator holder 2 includes: a central stem 21 protruding The stator holder 2 includes: a central stem 21 protruding
`
`longitudinally from a base 22 of the holder 2, with the base longitudinally from a base 22 of the holder 2, with the base
`
`22 combinable with the housing 5 for encasing the stator 1 22 combinable with the housing 5 for encasing the stator 1
`
`and the rotor 3 within the housing 5 and the holder 2. and the rotor 3 within the housing 5 and the holder 2.
`
`The inner stator 11 includes: an annular core 100 secured The inner stator 11 includes: an annular core 100 secured
`
`on the central stem 21 of the stator holder 2, a fin array on the central stem 21 of the stator holder 2, a fin array
`assembly 110A radially mounted on and concentrically assembly 110A radially mounted on and concentrically
`
`disposed around the core 100, an insulating coil bobbin
`disposed around the core 100, an insulating coil bobbin
`
`assembly 14A embedded with the fin array assembly 110A assembly 14A embedded with the fin array assembly 110A
`
`and provided for winding a plurality of magnetizing coil and provided for winding a plurality of magnetizing coil
`
`windings 12 on each insulating coil bobbin 14 of the bobbin windings 12 on each insulating coil bobbin 14 of the bobbin
`
`assembly 14A having electric wires 13 electrically con(cid:173)assembly 14A having electric wires 13 electrically con(cid:173)
`
`nected between the coil windings 12 and an external power nected between the coil windings 12 and an external power
`
`supply source (not shown), and a retaining disk 15 for fixing supply source (not shown), and a retaining disk 15 for fixing
`
`the core 100 on the stem 21 of the stator holder 2 by bolts the core 100 on the stem 21 of the stator holder 2 by bolts
`
`16. 16.
`
`The annular core 100 is formed by laminating a plurality The annular core 100 is formed by laminating a plurality
`
`of central collar members 10 along a longitudinal axis X of central collar members 10 along a longitudinal axis X
`
`defined at a longitudinal center of the central stem 21 of the defined at a longitudinal center of the central stem 21 of the
`
`stator holder 2; each central collar member 10 made of stator holder 2; each central collar member 10 made of
`
`60 magnetic conductor and each including: a central hole 101 60 magnetic conductor and each including: a central hole 101
`
`formed in a central portion of the collar member and formed in a central portion of the collar member and
`
`engageable with the central stem 21 of the stator holder 2, engage able with the central stem 21 of the stator holder 2,
`
`a plurality of recesses 102 circumferentially recessed and a plurality of recesses 102 circumferentially recessed and
`
`equally spaced in a periphery of the collar member each equally spaced in a periphery of the collar member each
`
`65 recess 102 being formed as a "1" shape, an inversed T (not 65 recess 102 being formed as a "1" shape, an inversed T (not
`
`shown) shape or any other suitable shapes, and a plurality of shown) shape or any other suitable shapes, and a plurality of
`
`bolt holes 103 formed in the collar member 10 adapted for bolt holes 103 formed in the collar member 10 adapted for
`
`
`
`SUMMARY OF THE INVENTION SUMMARY OF THE INVENTION
`
`
`The object of the present invention is to provide an The object of the present invention is to provide an
`
`electric motor of outer-rotor type including: an inner stator 45 electric motor of outer-rotor type including: an inner stator 45
`
`mounted on a stator holder, an outer rotor rotatably circum(cid:173)mounted on a stator holder, an outer rotor rotatably circum(cid:173)
`
`ferentially disposed around the inner stator, a shaft coaxially ferentially disposed around the inner stator, a shaft coaxially
`
`secured with the outer rotor, and a housing combined with secured with the outer rotor, and a housing combined with
`
`the stator holder for encasing the outer rotor and the inner the stator holder for encasing the outer rotor and the inner
`
`stator within the housing; with the inner stator including an 50 stator within the housing; with the inner stator including an 50
`
`annular core made of magnetic conductor, a plurality of fin annular core made of magnetic conductor, a plurality of fin
`
`arrays made of magnetic conductors and formed as a fin arrays made of magnetic conductors and formed as a fin
`
`array assembly concentrically wrapped on the annular core, array assembly concentrically wrapped on the annular core,
`
`and a plurality of insulating coil bobbins each coil bobbin and a plurality of insulating coil bobbins each coil bobbin
`
`pre-wound with the coil windings thereon and jacketed on 55 pre-wound with the coil windings thereon and jacketed on 55
`
`each fin array, thereby forming an inner stator having a each fin array, thereby forming an inner stator having a
`
`stable construction, a higher winding capacity, higher mag(cid:173)stable construction, a higher winding capacity, higher mag(cid:173)
`
`netic flux density and higher output power, as well as a lower netic flux density and higher output power, as well as a lower
`
`production cost. production cost.
`
`
`
`BRIEF DESCRIPTION OF THE DRAWINGS BRIEF DESCRIPTION OF THE DRAWINGS
`
`
`FIG. 1 is an exploded view showing the elements of the FIG. 1 is an exploded view showing the elements of the
`
`present invention. present invention.
`
`FIG. 2 is an illustration showing flattened fin array FIG. 2 is an illustration showing flattened fin array
`
`assembly and coil bobbin assembly of the present invention. assembly and coil bobbin assembly of the present invention.
`
`FIG. 3 is a front view from FIG. 2. FIG. 3 is a front view from FIG. 2.
`
`Page 10 of 13
`
`

`

`
`
`6,081,059 6,081,059
`
`3
`3
`
`passing each bolt 16 through each bolt hole 103 for coaxially passing each bolt 16 through each bolt hole 103 for coaxially
`
`fixing the core 100 on the stem 21 of the stator holder 2 as fixing the core 100 on the stem 21 of the stator holder 2 as
`
`shown in FIGS. 10 and 8; with all the recesses 102 longi(cid:173)shown in FIGS. 10 and 8; with all the recesses 102 longi(cid:173)
`
`tudinally or linearly aligned when all the core members 10 tudinally or linearly aligned when all the core members 10
`
`are laminated to form the core 100 as shown in FIGS. 7 and are laminated to form the core 100 as shown in FIGS. 7 and
`8. Besides, other joining methods, rather than the
`8. Besides, other joining methods, rather than the
`lamination, may be used for forming the core 100 including
`lamination, may be used for forming the core 100 including
`at least a core member 10.
`at least a core member 10.
`
`The fin array assembly 110A includes a plurality of fin The fin array assembly 110A includes a plurality of fin
`arrays 110 juxtapositionally linked together to be a linear 10
`arrays 110 juxtapositionally linked together to be a linear 10
`
`chain-like arrangement having a cross section defining a chain-like arrangement having a cross section defining a
`flattening line L2 (FIG. 2) projectively perpendicular to the
`flattening line L2 (FIG. 2) projectively perpendicular to the
`
`longitudinal axis X of the stem 21 of the stator holder 2, with longitudinal axis X of the stem 21 of the stator holder 2, with
`
`each fin array 110 generally parallel to the longitudinal axis each fin array 110 generally parallel to the longitudinal axis
`
`X of the stator holder 2. X of the stator holder 2.
`Each fin array 110 is formed by laminating a plurality of
`Each fin array 110 is formed by laminating a plurality of
`
`radial fin members 11 juxtapositional or parallel to the radial fin members 11 juxtapositional or parallel to the
`
`longitudinal axis X of the stem 21 of the stator holder 2; each longitudinal axis X of the stem 21 of the stator holder 2; each
`
`radial fin member 11 made of magnetic conductor, formed as radial fin member 11 made of magnetic conductor, formed as
`
`an arcuate T shape and each including: a shank portion 111, an arcuate T shape and each including: a shank portion 111,
`
`an engaging root portion 112, which may be formed as a "1" an engaging root portion 112, which may be formed as a "1"
`
`shape, an inversed T shape, a ratchet tooth shape or any other shape, an inversed T shape, a ratchet tooth shape or any other
`
`suitable shapes, formed on a bottom end of the shank portion suitable shapes, formed on a bottom end of the shank portion
`
`111 and engageable with each recess 102 (formed as "1" or 111 and engageable with each recess 102 (formed as "1" or
`
`inversed T shape, ratchet tooth shape or other shapes) in inversed T shape, ratchet tooth shape or other shapes) in
`
`each collar member 10 for radially mounting the fin array each collar member 10 for radially mounting the fin array
`110 on the annular core 100 of the inner stator 1, and a rod
`110 on the annular core 100 of the inner stator 1, and a rod
`
`portion 113 perpendicularly formed on a top end of the portion 113 perpendicularly formed on a top end of the
`
`shank portion 111 to form the T-shaped fin member 11; with shank portion 111 to form the T-shaped fin member 11; with
`all radial fin members 11 superimposed longitudinally to 30
`all radial fin members 11 superimposed longitudinally to 30
`
`form the fin array 110 (FIG. 2) to be juxtapositional to the form the fin array 110 (FIG. 2) to be juxtapositional to the
`
`longitudinal axis X defined at the longitudinal center of the longitudinal axis X defined at the longitudinal center of the
`
`core 100 and of the stem 21 of the holder 2. Every two core 100 and of the stem 21 of the holder 2. Every two
`
`neighboring fin members 11 of the corresponding two fin neighboring fin members 11 of the corresponding two fin
`arrays 110 are linked by a hinge portion 114 having thin 35
`arrays 110 are linked by a hinge portion 114 having thin 35
`
`thickness between two rod portions 113 of the two fin thickness between two rod portions 113 of the two fin
`members 11 (FIG. 5) to form a folding line F' between the
`members 11 (FIG. 5) to form a folding line F' between the
`
`two fin members 11, with each folding line F' parallel to the two fin members 11, with each folding line F' parallel to the
`longitudinal axis X of the holder 2; whereby upon a con(cid:173)
`longitudinal axis X of the holder 2; whereby upon a con(cid:173)
`
`centric curving of the fin array assembly 110A about the axis 40 centric curving of the fin array assembly 110A about the axis 40
`
`X, the fin array assembly 110A will be concentrically X, the fin array assembly 110A will be concentrically
`wrapped on the core 100 as packed by the coil bobbins 14
`wrapped on the core 100 as packed by the coil bobbins 14
`
`of bobbin array 14A. of bobbin array 14A.
`The insulating coil bobbin assembly 14A includes a
`The insulating coil bobbin assembly 14A includes a
`
`plurality of insulating coil bobbins 14 juxtapositionally 45 plurality of insulating coil bobbins 14 juxtaposition ally 45
`
`linked together to be a linear chain-like arrangement having linked together to be a linear chain-like arrangement having
`a cross section defining a flattening line L1 (FIG. 2) pro(cid:173)
`a cross section defining a flattening line L1 (FIG. 2) pro(cid:173)
`
`jectively perpendicular to the longitudinal axis X of the jectively perpendicular to the longitudinal axis X of the
`stator holder 2, with each coil bobbin 14 generally parallel
`stator holder 2, with each coil bobbin 14 generally parallel
`
`to the longitudinal axis X of the holder 2. Each insulating 50 to the longitudinal axis X of the holder 2. Each insulating 50
`
`coil bobbin 14 is made of electrically insulative material coil bobbin 14 is made of electrically insulative material
`
`having its cross section generally formed as an I shape, having its cross section generally formed as an I shape,
`including: a central slot 140 longitudinally formed in an
`including: a central slot 140 longitudinally formed in an
`elongate reel portion 141 and engageable with the shank
`elongate reel portion 141 and engage able with the shank
`
`portion 111 of each radial fin member 11 of the fin array 110 55 portion 111 of each radial fin member 11 of the fin array 110 55
`
`when inserting each root portion 112 of each fin member 11 when inserting each root portion 112 of each fin member 11
`
`through the central slot 140 to be protruded downwardly through the central slot 140 to be protruded downwardly
`beyond the central slot 140, a centripetal flange 142 per(cid:173)
`beyond the central slot 140, a centripetal flange 142 per(cid:173)
`
`pendicularly formed on a bottom portion of the reel portion pendicularly formed on a bottom portion of the reel portion
`
`141 and engageably ridable on a periphery of the core 100, 60 141 and engageably ridable on a periphery of the core 100, 60
`
`and a peripheral flange 143 perpendicularly formed on a top and a peripheral flange 143 perpendicularly formed on a top
`
`portion of the reel portion 141 for retaining the rod portion portion of the reel portion 141 for retaining the rod portion
`
`113 of each radial fin member 11 when engaged with each 113 of each radial fin member 11 when engaged with each
`
`coil bobbin 14; whereby upon insertion of the shank portions coil bobbin 14; whereby upon insertion of the shank portions
`
`111 of the fin members 11 of the fin array 110 into the central 65 111 of the fin members 11 of the fin array 110 into the central 65
`
`slots 140 of the insulating coil bobbins 14 to protrude the slots 140 of the insulating coil bobbins 14 to protrude the
`
`root portions 112 of the fin members 11 of the fin array 110 root portions 112 of the fin members 11 of the fin array 110
`
`4
`4
`
`beyond the centripetal flanges 142 of the bobbins 14, and beyond the centripetal flanges 142 of the bobbins 14, and
`
`upon engagement of the root portions 112 of the fin array upon engagement of the root portions 112 of the fin array
`110 with the recesses 102 as recessed in the collar members
`110 with the recesses 102 as recessed in the collar members
`
`10 of the core 100; the fin array 110 will be radially mounted 10 of the core 100; the fin array 110 will be radially mounted
`
`5 on the periphery of the core 100 having the insulating coil 5 on the periphery of the core 100 having the insulating coil
`
`bobbins 14 packed and retained between the rod portions bobbins 14 packed and retained between the rod portions
`
`113 of the fin array 110 and the periphery of the core 100. 113 of the fin array 110 and the periphery of the core 100.
`Every two neighboring coil bobbins 14 are linked by a
`Every two neighboring coil bobbins 14 are linked by a
`hinge portion 144 as shown in FIG. 4 having thin thickness
`hinge portion 144 as shown in FIG. 4 having thin thickness
`
`between two peripheral flanges 143 of the two coil bobbins between two peripheral flanges 143 of the two coil bobbins
`14 to form a folding line F between the two coil bobbins 14,
`14 to form a folding line F between the two coil bobbins 14,
`
`with each folding line F parallel to the longitudinal axis X with each folding line F parallel to the longitudinal axis X
`
`of the holder 2. Upon concentric curving of the bobbin of the holder 2. Upon concentric curving of the bobbin
`assembly 14A, the bobbins 14 will be concentrically
`assembly 14A, the bobbins 14 will be concentrically
`
`15 wrapped on the core 100. 15 wrapped on the core 100.
`The coil bobbins 14 may be pre-wound with the magne(cid:173)
`The coil bobbins 14 may be pre-wound with the magne(cid:173)
`
`tizing coil windings 12 on the bobbins 14. Then, the fin tizing coil windings 12 on the bobbins 14. Then, the fin
`
`arrays 110 of the fin array assembly 110A are embedded into arrays 110 of the fin array assembly 110A are embedded into
`
`the slots 140 in the bobbins 14 of the bobbin assembly 14A the slots 140 in the bobbins 14 of the bobbin assembly 14A
`20 to allow each fin array 110 to be engaged with each coil
`20 to allow each fin array 110 to be engaged with each coil
`bobbin 14; whereby upon a concentric curving of the fin
`bobbin 14; whereby upon a concentric curving of the fin
`
`array 110A and the bobbin assembly 14A, an annular array 110A and the bobbin assembly 14A, an annular
`
`configuration by combining the fin array 110A with the configuration by combining the fin array 110A with the
`
`bobbin assembly 14A is formed as shown in FIG. 6; having bobbin assembly 14A is formed as shown in FIG. 6; having
`25 an inner ring 145 formed by concentrically connecting the
`25 an inner ring 145 formed by concentrically connecting the
`centripetal flanges 142 of the bobbins 14, and an outer ring
`centripetal flanges 142 of the bobbins 14, and an outer ring
`146 formed by concentrically curving the peripheral flanges
`146 formed by concentrically curving the peripheral flanges
`
`143 of the bobbins 14. 143 of the bobbins 14.
`
`Each root portion 112 of each fin member 11 is engage(cid:173)Each root portion 112 of each fin member 11 is engage(cid:173)
`ably inserted into each recess 102 recessed in each collar
`ably inserted into each recess 102 recessed in each collar
`
`member 10 of the core 100. Upon engaging of the annular member 10 of the core 100. Upon engaging of the annular
`
`combination of the fin array assembly 110A and bobbin combination of the fin array assembly 110A and bobbin
`
`assembly 14A with the core 100 (FIGS. 7, 8, 10) by assembly 14A with the core 100 (FIGS. 7, 8, 10) by
`engaging the root portions 112 with the recesses 102 and by
`engaging the root portions 112 with the recesses 102 and by
`
`engaging the inner ring 145 of the bobbin assembly 14A engaging the inner ring 145 of the bobbin assembly 14A
`
`with a collar periphery 104 of the core 100, the inner stator with a collar periphery 104 of the core 100, the inner stator
`1 will be assembled. With the inner and outer rings 145, 146
`1 will be assembled. With the inner