CN1671029A - Brushless DC motor - Google Patents
Brushless DC motor Download PDFInfo
- Publication number
- CN1671029A CN1671029A CNA2005100563483A CN200510056348A CN1671029A CN 1671029 A CN1671029 A CN 1671029A CN A2005100563483 A CNA2005100563483 A CN A2005100563483A CN 200510056348 A CN200510056348 A CN 200510056348A CN 1671029 A CN1671029 A CN 1671029A
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- motor
- brushless
- rotor
- tooth parts
- tooth
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- 229910000831 Steel Inorganic materials 0.000 claims description 51
- 239000010959 steel Substances 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 19
- 230000005284 excitation Effects 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 2
- 238000004804 winding Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 210000002445 nipple Anatomy 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 210000000527 greater trochanter Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 210000004210 tooth component Anatomy 0.000 description 1
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Classifications
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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
- H02K1/22—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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Brushless Motors (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provided a brushless DC motor for regular winding even for a thick coil, and for a high torque with the diameter of a rotor as large as possible. Each tooth 18 is almost T-shaped, comprising a base part 34 and an exciting part 36, and a part of the exciting part 36 of the adjoining teeth 18 is connected each other, to constitute a teeth set member 20. A coil 30 wound on an insulating bobbin 32 is inserted from the outer peripheral side of the base part 34 of the teeth 18 in the teeth set member 20. N-pieces of fixing grooves 38 are provided in the axial direction of a cylindrical core back 16. The outer ends of the base part 34 of the teeth 18 are inserted from the opening parts of the fixing grooves 38 of the cylindrical core back 16, so that the teeth set member 20 is disposed on the inner periphery of the core back 16.
Description
Technical field
The present invention relates to the employed brushless direct-current of electric tool or toy (DC) motor.
Background technology
In the prior art, use the drive source of motor (for example, with reference to patent documentation 1) as electric tool etc.
Become the motor of this drive source, the brushless DC motor of normal use low voltage drive and high output (below, be called for short motor), this motor, if input current flows into the then not output of few words, so must use the coil that is made of large diameter copper cash.Therefore, increase and to be used for this coil is wound into space on the stator, the diameter of rotor is reduced, become to use and obtains the motor exported by the high speed of low torque.That is, this motor, though there is torque generation efficient low, the index step-down of brushless DC motor in the high torque (HT) zone.
Patent documentation 1: TOHKEMY 2002-18747 communique
As described above, in existing motor, this mode of diameter that as far as possible adds greater trochanter in order to obtain high torque (HT) is effective, but owing to also must increase the space of the coiling that is used to carry out stator coil, so be difficult to take into account these both, particularly, in the motor of inner-rotor type, existence can not be carried out the problem of directed spooling to large diameter coil.
Summary of the invention
The present invention in view of the above problems, even also can carry out the brushless DC motor that diameter ground directed spooling and that can add greater trochanter obtains high torque (HT) to the thick line circle as far as possible for providing a kind of.
The invention of technical scheme 1, be a kind of brushless DC motor, described brushless DC motor has stator and rotor, described stator, its n tooth parts are inwardly all outstanding from the rear of core spare of tubular, and the coil of on described each tooth parts, reeling respectively, described rotor, be disposed at all sides in the described stator free to rotately, wherein, described n tooth parts are (the separating) that split forms with described rear of core spare, the base portion of described each tooth parts and be outstanding roughly T font from the circumferential a pair of excitation division of the interior Zhou Duanxiang of this base portion, and the part of the excitation division of the tooth parts of described adjacency constitutes the tooth element mutually with linking, base portion at each tooth parts of described tooth element, embed described coil on the coil rack that the insulating properties of being wound on is arranged from outer circumferential side respectively, the rear of core spare of described tubular axially on n holddown groove is set, one end of these holddown grooves is one open-ended described rear of core spare, from the outer end that the peristome of each holddown groove of the rear of core spare of described tubular inserts the base portion of described each tooth parts respectively, described tooth element is disposed at the interior week of described rear of core spare.
The invention of technical scheme 2, be brushless DC motor as claimed in claim 1, wherein, described tooth element, be laminated by the steel plate and the annular steel plate that are partitioned into n roughly T font, the steel plate of described annular, its part corresponding with the described excitation division of the tooth parts of described roughly T font is linking mutually.
The invention of technical scheme 3 is brushless DC motor as claimed in claim 1, and wherein, the base portion of at least 2 tooth parts in described n tooth parts is also more outstanding than described rear of core spare, and described outstanding base portion cooperates with the framework of electric tool.
The invention of technical scheme 4 is brushless DC motor as claimed in claim 1, and wherein, described coil is directed spooling to described coil rack.
The invention of technical scheme 5, be a kind of brushless DC motor, described brushless DC motor has stator and rotor, described stator, its n tooth parts from the rear of core spare of tubular inwardly week outstanding, coil be wound on respectively on described each tooth parts, described rotor, be disposed at all sides in the described stator free to rotately, wherein, the axis hole of rotation axis the center of the rotor core of described rotor axially on connect, at least a portion of the section of described axis hole is D font roughly, is D font roughly corresponding to the section configuration of the described rotation axis of described D font axis hole.
The invention of technical scheme 6, be brushless DC motor as claimed in claim 4, wherein, described rotor core axially on a plurality of magnet insertion holes are set, rotation is inserted in respectively in described each magnet insertion holes with magnet, dispose a pair of cooling fan at the both ends of described rotor, with the rotation magnet of described each the magnet insertion holes inside of described a pair of cooling fan clamping.
The invention of technical scheme 7, be brushless DC motor as claimed in claim 4, wherein, the position detecting magnet of annular is set, near described position detecting magnet, is provided for detecting the magnetic detecting element of the turned position of described rotor a side of described a pair of cooling fan.
The invention of technical scheme 8 is brushless DC motor as claimed in claim 1, and the rear of core spare of wherein said tubular is stacked by doughnut-shaped steel plate is riveted, and forms tubular.
The invention of technical scheme 9 is brushless DC motor as claimed in claim 1, and wherein, the rear of core spare of described tubular is cast iron or punching press and forming as one.
Brushless DC motor to the invention of technical scheme 1 describes.
The rear of core spare of this brushless DC motor stator and tooth parts are formed separately, and in addition, each tooth parts is T font roughly, and the part of the excitation division of the tooth parts of the described adjacency tooth element of formation tubular mutually with linking.
And the coil of reeling on the coil rack of insulating properties is embedded in the coil rack that is wound with this coil the base portion of each T Zee bar steel Z respectively from outer circumferential side.The rear of core spare of tubular axially on, n holddown groove is set, from the outer end that the peristome of this holddown groove inserts the base portion of described a plurality of tooth parts respectively, will have the interior week of the tooth component configuration of coil in described rear of core spare.
Thus, the assembling of the stator of brushless DC motor becomes simply, the winding space of coil can be limited in Min., can add the diameter of greater trochanter, so can realize producing the increase of torque.
In the brushless DC motor of the invention of technical scheme 2, word steel installing component, part by steel plate that is partitioned into the individual roughly T font of n and excitation division links mutually for the individual roughly steel plate of T font of the n of one is laminated, so can easily constitute the tooth element.
In the brushless DC motor of the invention of technical scheme 3, owing to the base portion of at least 2 tooth parts in n the tooth parts is also more outstanding than described rear of core spare, so cooperate with the framework of electric tool by this outstanding base portion, brushless DC motor can be fixed on the framework of electric tool.
In the brushless DC motor of the invention of technical scheme 4, coil is directed spooling to described coil rack, because as long as coil is wound up on the coil rack, so can easily carry out directed spooling.
In the brushless DC motor of the invention of technical scheme 5,,, can prevent that also rotation axis from bending so can carry out this push operation easily owing to will be pressed into rotor core for the rotation axis of D font roughly corresponding to the section configuration of D font axis hole.In addition, about the torque of the generation of motor, can positively carry out the locking function of rotor.
In the brushless DC motor of the invention of technical scheme 6, owing to be structure with a pair of cooling fan grip roll, so the rotation magnet of each magnet insertion holes inside in clamping.
In the brushless DC motor of the invention of technical scheme 7,,, in addition, assemble and also become easy so can reduce the size of rotor because cooling fan and position detecting magnet are set to one.
In the brushless DC motor of the invention of technical scheme 8, because the rear of core spare of described tubular,, form tubular by with the doughnut-shaped steel plate riveted joint and stacked.So be easy to make, in addition, the motor efficiency height.
In the brushless DC motor of the invention of technical scheme 9, owing to iron cast or punching press and the rear of core spare of integrally formed described tubular, so be easy to make.
Description of drawings
Fig. 1 is the skiagraph of the motor of embodiment 1.
Fig. 2 is the side view with motor.
Fig. 3 is the front elevation of motor.
Fig. 4 is the back side bulk of motor.
Fig. 5 is the A-A line sectional drawing of Fig. 2.
Fig. 6 is the B-B line sectional drawing of Fig. 2.
Fig. 7 is the C-C line sectional drawing of Fig. 2.
Fig. 8 is the front elevation of the steel plate of Class1.
Fig. 9 is the front elevation of the steel plate of type 2.
Figure 10 is the front elevation of the steel plate of type 3.
Figure 11 is the key diagram of the steel plate of type 4.
Figure 12 is the skiagraph of tooth element.
Figure 13 is the skiagraph of cooling fan.
Figure 14 is the front elevation of cooling fan.
Figure 15 is the back view of cooling fan.
Figure 16 is the figure of explanation winding method.
Figure 17 is the skiagraph of the motor of embodiment 2.
Figure 18 is the D-D line sectional drawing of Figure 17.
Figure 19 is the E-E line sectional drawing of Figure 17.
Figure 20 is the F-F line sectional drawing of Figure 17.
Figure 21 is a G-G line sectional drawing among Figure 17.
Embodiment
(embodiment 1)
Below, according to Fig. 1～Figure 16 embodiments of the invention 1 are described.
The three-phase brushless DC motor of present embodiment (below, abbreviate motor as) 10, be the electric tool motor, use the framework inside that is housed in electric tool.
Below, about the structure of motor 10, divide stator 12 and rotor 14 to describe.
(1) stator 12
Structure and manufacture method to stator 12 together describe.
Stator 12 by the rear of core spare 16 of tubular and from the interior week of rear of core spare 16 6 side-prominent tooth parts 18 constitute, 6 tooth parts constitute tooth element 20 with becoming one.
(1-1) the tooth element 20
At first, according to Fig. 8～Figure 12 tooth element 20 is described.
As shown in Figure 8, the steel plate 22 of Class1, be 6 roughly the 22a of steel plate portion of T font connect to.Circumferentially interconnecting at the two ends of outstanding excitation division 22b with interior Zhou Duanxiang, forming annular from the base portion of tooth parts 18.Among 6 base portions of tooth parts 18, the length of 4 base portion 22c is identical with the external diameter of rear of core spare 16, and remaining 2 base portion 22d is than the outer path length of rear of core part 16, and is outstanding from rear of core spare 16.This base portion 22d, 22d are arranged on the opposed position.
As shown in Figure 9, the steel plate 24 of type 2 is made of 6 24a of steel plate portion, and each 24a of steel plate portion is independent.The 24a of this steel plate portion is T font roughly, and excitation division 24b is two side-prominent from the interior Zhou Duan's of base portion 24c.The length of base portion 24c is the length identical with the external diameter of rear of core spare 16.
As shown in figure 10, the steel plate 26 of type 3 is made of 6 26a of steel plate portion, and each 26a of steel plate portion is independent.The 26a of this steel plate portion is T font roughly, and excitation division 26b is two side-prominent from the interior Zhou Duan's of base portion 26c.The length of base portion 26c is the length identical with the internal diameter of rear of core spare 16.
As shown in figure 11, the steel plate 28 of type 4 forms annular with linking 6 28a of steel plate portion.The 28a of steel plate portion is T font roughly, and excitation division 28b is two side-prominent from the interior Zhou Duan's of base portion 28c, and the 28a of steel plate portion by this excitation division 28b and adjacency links.The length of base portion 28c is the length identical with the internal diameter of rear of core spare 16.
The all types of steel plate 24～28 that above-mentioned such stamping-out is obtained is riveted stacked, forms tooth element 20.Behind the steel plate 22 of stacked 15 Class1, the steel plate 24 of stacked 28 types 2, the steel plate 26 of stacked then 27 types 3, the steel plate 28 of last stacked 15 types 4.
By so above-mentioned, as shown in figure 12, constitute tooth element 20.Tooth element 20 becomes the stacked structure that 6 tooth parts 18 are become one by these steel plates 22～28, each tooth parts 18 of this T font, by the base portion 34 of radial extension and in it two side-prominent excitation divisions 36 of Zhou Duan form.
(1-2) coiling of coil 30
Then, coil 30 is wound on this tooth element 20.The method of this coiling is, on the coil rack 32 of coil 30 directed spooling to 6 insulating properties that will be made of copper cash.Afterwards, the coil rack 32 that is wound with this coil 30 is inserted from the outer circumferential side of 6 base portions 34 of tooth element 20 respectively.
(1-3) assembling of the rear of core spare 16 of tooth element 20 and tubular
Below, shown in Fig. 2～4, the tooth element 20 that 6 coils 30 are installed is inserted in the interior week of the rear of core spare 16 of tubular.
The rear of core spare of tubular 16 is undertaken stackedly by the steel plate of riveting annular, forms tubular.The rear of core spare 16 of tubular axially on, 6 holddown grooves 38 are set.This holddown groove 38 is open-ended at rear of core spare 16 respectively.
6 base portions 34 of tooth element 20 peristome from holddown groove 38 is inserted.At this moment, the axial length of holddown groove 38, become with the steel plate 22 of Class1 and the steel plate 24 stacked measure-alike length that obtain of type 2.Promptly, when tooth element 20 being inserted interior all side of rear of core spares 16, the base portion 24c of the base portion 22c of the steel plate 22 of Class1 and the steel plate 24 of type 2 is outstanding from holddown groove 38, and the base portion 28c of the base portion 26c of the steel plate 26 of type 3 and the steel plate 28 of type 4 is assemblied in interior all sides of rear of core spare 16.
(1-4) transition distribution and public wiring
Because the coil 30 of motor 10 is the Y connecting line, so will become the public wiring and each transition distribution mutually that the heart wherein continues.
For the U phase, be wound up into counterclockwise No. 1 on the tooth parts 18 coil 30, be wound up into No. 4 coils 30 on the tooth parts 18 counterclockwise and be connected.
For the V phase, be wound up into counterclockwise No. 6 on the tooth parts 18 coil 30, be wound up into No. 3 coils 30 on the tooth parts 18 counterclockwise and be connected.
For the W phase, be wound up into counterclockwise No. 5 on the tooth parts 18 coil 30, be wound up into No. 2 coils 30 on the tooth parts 18 counterclockwise and be connected.
Then, an end of the coil 30,30,30 of three-phase is connected, carry out public wiring.
Like this, be assembled into stator 12.2 base portion 22d of the steel plate 22 of Class1 are outstanding from rear of core spare 16.Base portion 22d that should be outstanding is such as described later, is inserted in the groove of framework of electric tool, stator 12 can be fixed in the framework of electric tool.
(2) rotor 14
Structure and manufacture method to rotor 14 together describe.The front end of rotor 14 is an outlet side, and the rear end is the opposition side of output.
(2-1) formation of rotor core 40
Shown in Fig. 5～7, the steel plate of stacked many circles forms rotor core 40.Central part in this rotor core 40 is through with axis hole 42, is through with 8 clavates that are used to insert the S utmost point and the N utmost point in the outer direction of this axis hole 42 and rotates magnet insertion holes 44 with magnet 74,76.In addition, between axis hole 42 and 8 magnet insertion holes 44, be through with fixing hole 48.
The shape of axis hole 42, the section configuration of the part of the only about half of length that rotor core 40 is axial are circular (with reference to Fig. 5,7), and all the other half section configuration is D font (with reference to Fig. 6).
(2-2) rotation axis 50 and the installation of rotating with magnet 74,76
Then, respectively the rotation of the S utmost point alternatively is inserted in 8 magnet insertion holes 44 with magnet 76 with magnet 74 and the rotation of the N utmost point.
(2-3) installation of cooling fan 52,54
Freezing but according to the synthetic resin at Fig. 1～4 and Figure 13～15 subtend rotor cores, 40 two ends, the installation of fan 52,54 describes.
Be installed on the cooling fan 52 of rotor 14 front ends, as shown in Figure 1, the heart has the through hole 56 that connects rotation axis 50 therein, is provided with 8 blades 58 as shown in Figure 3 around it.In addition,, be provided with 4 fixedly teats 70, be inserted in 4 fixing holes 48, cooling fan 54 relative rotor cores 40 can be fixed on the position of regulation in stator core 40 upper sheds in rotor 14 sides of cooling fan 54.
Be installed in the cooling fan 54 on the rearward end of rotor 14, as shown in Figures 1 and 2, be provided with the through hole 60 that connects rotation axis 50, around it, be provided with 8 blades 62 at the center of cooling fan 54.
Middle body at these 8 blades 62 is formed with recess 64, as shown in Figure 4, embeds the position detecting magnet 64 of annular.As Figure 13 and shown in Figure 15, be provided with connecting hole 66 at this recess 64, cooperate with the teat of giving prominence to from position detecting magnet 64 68, can be with position detecting magnet 64 relative recesses 64 location.And position detecting magnet 64 fixing is provided with teat 65 in the edge portion of recess 64, and with these teat 65 fusings, the edge portion ground that covers position detecting magnet 64 is fixed by heat.
In addition, also give prominence to 4 fixedly teats 72, insert in the fixing hole 48 of stator core 40 in rotor 14 sides of cooling fan 52.
With magnet 74,76, make it not break away from rotor core 40 by 8 rotations of a pair of cooling fan 54,56 clampings.
At last bearing 78,80 is respectively installed to the leading section and the rearward end of rotation axis 50.
(3) the final assembling of motor 10
Rotor 14 is assemblied in interior all sides of the above-mentioned stator that makes like that 12, afterwards the framework inside that motor 10 is inserted electric tools.
At this moment, make the base portion 22d of the steel plate 22 of the Class1 ground that matches with the groove of electric tool framework as described above, motor 10 is fixed to the inboard of electric tool framework.
When the framework that motor 10 is configured in electric tool was inner, near configuration Hall integrated circuit position detecting magnet 64 (ホ one Le IC) was by the rotary state of this Hall integrated circuit detection rotor 14.
(5) effect of present embodiment
Above-mentioned such motor that constitutes 10 has following effect.
Be restricted to Min. owing to will be used for the coil space of spooling coil 30,, the torque of generation increased so can add the diameter of greater trochanter 14.Therefore, can improve the motor efficiency of high torqueization, can also corresponding big load.In addition, obtain identical torque owing to reducing rotating speed, so can suppress noise vibration.
Rotation axis is the D font, and the axis hole 42 of stator core 40 is the D font, so can positively bring into play the locking function of rotor 14.In addition, the assembling of rotor 14 also can easily be carried out.In addition, can prevent the bending of rotation axis 50.
(embodiment 2)
Motor 10 according to Figure 17～21 couple embodiment 2 describes.
The motor 10 of present embodiment is the motor 10 of the thin type type corresponding with the framework more tiny than the electric tool of embodiment 1, and the diameter of its rotor 14 and stator 12 is provided with for a short time.
Even be the motor 10 of present embodiment, also can easily assemble, spiral is simple to operate.
In addition, even the diameter of motor 10 is little, also can obtain the torque higher than prior art.
(modified example)
In the above-described embodiments, the rear of core spare of tubular 16 carries out the stacked tubular that forms by the riveted joint doughnut-shaped steel plate, but also can not form like this, and the rear of core spare of tubular 16 can form by iron is cast or suppressed.
Industrial applicibility
Brushless direct current motor of the present invention is applicable to the motor that electric tool or toy are used, Be specially adapted to the motor that rotates in battery-operated mode.
Claims (9)
1. brushless DC motor, described brushless DC motor has stator and rotor, the n of described stator tooth parts are from the inwardly all outstanding and coils of reeling respectively on described each tooth parts of the rear of core spare of tubular, described rotor is disposed at all sides in the described stator free to rotately, it is characterized in that
Described n tooth parts are what to separate with described rear of core spare,
The base portion of described each tooth parts and be outstanding roughly T font from the circumferential a pair of excitation division of the interior Zhou Duanxiang of this base portion, and the part of the excitation division of the tooth parts of described adjacency constitutes the tooth element mutually with linking,
At the base portion of each tooth parts of described tooth element, embedded described coil on the coil rack that is wound on insulating properties from outer circumferential side respectively,
The rear of core spare of described tubular axially on n holddown groove is set, an end of these holddown grooves is one open-ended described rear of core spare,
From the outer end that the peristome of each holddown groove of the rear of core spare of described tubular inserts the base portion of described each tooth parts respectively, described tooth element is disposed at the interior week of described rear of core spare.
2. brushless DC motor as claimed in claim 1, it is characterized in that, described tooth element, be laminated by the steel plate and the annular steel plate that are partitioned into n roughly T font, the steel plate of described annular, its part corresponding to the described excitation division of described roughly T font tooth parts is linking mutually.
3. brushless DC motor as claimed in claim 1 is characterized in that, the base portion of at least 2 tooth parts in described n tooth parts is also more outstanding than described rear of core spare, and described outstanding base portion cooperates with the framework of electric tool.
4. brushless DC motor as claimed in claim 1 is characterized in that, described coil is directed spooling to described coil rack.
5. brushless DC motor, described brushless DC motor has stator and rotor, described stator, its n tooth parts are from the inwardly all outstanding and coils of reeling respectively on described each tooth parts of the rear of core spare of tubular, described rotor, be disposed at all sides in the described stator free to rotately, it is characterized in that
The axis hole of rotation axis the center of the rotor core of described rotor axially on connect,
At least a portion of the section of described axis hole is D font roughly,
Be D font roughly corresponding to the section configuration of the described rotation axis of described D font axis hole.
6. brushless DC motor as claimed in claim 4 is characterized in that, described rotor core axially on a plurality of magnet insertion holes are set,
Rotation is inserted in respectively in described each magnet insertion holes with magnet,
Dispose a pair of cooling fan at the both ends of described rotor,
Rotation magnet with described each the magnet insertion holes inside of described a pair of cooling fan clamping.
7. brushless DC motor as claimed in claim 4 is characterized in that, a side of described a pair of cooling fan the position detecting magnet of annular is set,
Near described position detecting magnet, be provided for detecting the magnetic detecting element of the turned position of described rotor.
8. brushless DC motor as claimed in claim 1 is characterized in that, the rear of core spare of described tubular is stacked by doughnut-shaped steel plate is riveted, and forms tubular.
9. brushless DC motor as claimed in claim 1 is characterized in that, the rear of core spare of described tubular is cast iron or punching press and forming as one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP081507/2004 | 2004-03-19 | ||
| JP2004081507A JP2005269831A (en) | 2004-03-19 | 2004-03-19 | Brushless dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1671029A true CN1671029A (en) | 2005-09-21 |
Family
ID=35042133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100563483A Pending CN1671029A (en) | 2004-03-19 | 2005-03-18 | Brushless DC motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2005269831A (en) |
| KR (1) | KR100668946B1 (en) |
| CN (1) | CN1671029A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938173A (en) * | 2009-06-30 | 2011-01-05 | 日本电产芝浦株式会社 | Rotor of brushless motor |
| CN103683664A (en) * | 2012-09-26 | 2014-03-26 | 日立工机株式会社 | Brushless motor and electric-powered tool |
| CN103956874A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN104659999A (en) * | 2015-02-13 | 2015-05-27 | 长沙启科电子有限公司 | Built-in double-insulation brushless direct-current motor used for high-power electric breaker |
| CN107836074A (en) * | 2015-07-13 | 2018-03-23 | 标立电机有限公司 | Detector magnet-wheel for the magnetic-type of motor |
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| JP5025999B2 (en) * | 2006-06-09 | 2012-09-12 | 株式会社マキタ | DC brushless motor for electric tools |
| KR102013852B1 (en) * | 2012-12-17 | 2019-08-23 | 엘지이노텍 주식회사 | Motor |
| CN104578491B (en) * | 2014-12-31 | 2018-01-02 | 南京航空航天大学 | A kind of trapezoidal rotor toothing sineization double salient-pole electric machine and its design method |
| CN105356709A (en) * | 2015-11-30 | 2016-02-24 | 济宁环宇机电有限责任公司 | Permanent magnet DC brushless motor for pure electric vehicle |
| JP7426318B2 (en) | 2020-09-28 | 2024-02-01 | 日立グローバルライフソリューションズ株式会社 | Electric motors, electric blowers and vacuum cleaners |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8825071D0 (en) * | 1988-10-26 | 1988-11-30 | Nelco Holdings Ltd | Laminated stators for dynamo electric machines |
| JP2945037B2 (en) * | 1989-09-29 | 1999-09-06 | 日本サーボ株式会社 | Small rotating electric machine |
| JP2001186696A (en) * | 1999-12-24 | 2001-07-06 | Tamagawa Seiki Co Ltd | Stator core structure, stator core winding method, and rotation detector |
| JP2001352721A (en) * | 2000-06-02 | 2001-12-21 | Ishikawajima Harima Heavy Ind Co Ltd | Induction motor stator and assembly method |
| JP3621894B2 (en) * | 2001-04-13 | 2005-02-16 | 松下エコシステムズ株式会社 | Stabilizer for internal motor |
| JP2003264947A (en) * | 2002-03-08 | 2003-09-19 | Fujitsu General Ltd | Permanent magnet motor |
| KR100454556B1 (en) * | 2002-05-09 | 2004-11-05 | 주식회사 미크로닉 | Stator for BLDC Motor Using Segmental Stator Cores, Fabricating Method thereof and BLDC Motor Using the Same |
-
2004
- 2004-03-19 JP JP2004081507A patent/JP2005269831A/en active Pending
-
2005
- 2005-03-18 KR KR1020050022635A patent/KR100668946B1/en not_active IP Right Cessation
- 2005-03-18 CN CNA2005100563483A patent/CN1671029A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938173A (en) * | 2009-06-30 | 2011-01-05 | 日本电产芝浦株式会社 | Rotor of brushless motor |
| CN101938173B (en) * | 2009-06-30 | 2014-10-22 | 日本电产高科电机株式会社 | Rotor of brushless motor |
| CN103683664A (en) * | 2012-09-26 | 2014-03-26 | 日立工机株式会社 | Brushless motor and electric-powered tool |
| CN103956874A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN104659999A (en) * | 2015-02-13 | 2015-05-27 | 长沙启科电子有限公司 | Built-in double-insulation brushless direct-current motor used for high-power electric breaker |
| CN107836074A (en) * | 2015-07-13 | 2018-03-23 | 标立电机有限公司 | Detector magnet-wheel for the magnetic-type of motor |
| CN107836074B (en) * | 2015-07-13 | 2020-09-04 | 标立电机有限公司 | Magnetic detector magnet wheel for an electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005269831A (en) | 2005-09-29 |
| KR20060044394A (en) | 2006-05-16 |
| KR100668946B1 (en) | 2007-01-12 |
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