CN109861481A - Slotless electric motor and electric blower and electric vacuum cleaner using same - Google Patents
Slotless electric motor and electric blower and electric vacuum cleaner using same Download PDFInfo
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- CN109861481A CN109861481A CN201811024549.9A CN201811024549A CN109861481A CN 109861481 A CN109861481 A CN 109861481A CN 201811024549 A CN201811024549 A CN 201811024549A CN 109861481 A CN109861481 A CN 109861481A
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Abstract
本发明提供改善了电动机效率的小型高速的电动机和使用它的电动风机与电吸尘器。电动机包括：定子，其包括中空圆筒状的铁心，和将导体卷绕于所述铁心而得到的线圈；和与所述定子的内侧线圈相对且被可旋转地配置的永磁体转子，在所述定子的外侧配置有保持所述定子且内部为空腔的保持架。
The present invention provides a small and high-speed motor with improved motor efficiency, and an electric blower and an electric vacuum cleaner using the same. The electric motor includes: a stator including a hollow cylindrical iron core and a coil obtained by winding a conductor around the iron core; and a permanent magnet rotor rotatably arranged opposite to the inner coil of the stator, in which The outer side of the stator is provided with a cage that holds the stator and has a cavity inside.
Description
Technical field
The present invention relates to slot-less motor and use its electric fan and electric vacuum cleaner.
Background technique
Demand is rapidly in raised cleaner with no rope in recent years, in order to can also obtain under the driving of the battery of low-voltage
Enough output is equipped with the electric fan using brushless motor.
In order to meet electric vacuum cleaner miniaturization demand, to electric fan also require realize minimize.With regard to electric fan
Miniaturization for, by improve electric fan revolving speed, can make fan shape realize miniaturization.Therefore, make brushless electricity
The revolving speed of motivation is that there are many about 80,000 turns or more of example.
The structure of brushless motor as dust catcher can enumerate motor as patent document 1.In patent document
In 1 motor, by constituting stator to all toothed portion convolute coils extended inwardly in stator core.
As small-sized, high speed the structure suitable for dust catcher brushless motor, such as there are patent document 2, patent text
Slotless configuration of the stator side as offering 3 without tooth core (teeth core).Patent document 2, patent document 3 structure due to not having
Tooth core, therefore be easy to reduce the diameter and iron loss can be reduced.In turn, patent document 2 is configured by using in the inside of stator core
Internal rotor and the dual-rotor structure for configuring outer rotor on the outside, Lai Zeng great torque output.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2014-219006 bulletin
Patent document 2: Japanese Unexamined Patent Publication 5-161290 bulletin
Patent document 3:WO15/104795
Summary of the invention
Technical problems to be solved by the inivention
But motor realizes that high speed will lead to iron loss increase, becomes the main reason for motor efficiency declines.This
Outside, due to making motor miniaturization, the calorific value increase of unit volume, heat dissipation area reduce, and motor temperature is caused to rise, therefore
Residual magnetic flux density decline in magnet, coil resistance increase, and then copper loss increases, and become the main original of motor efficiency decline
Cause.
In order to make the motor of patent document 1 realize miniaturization, it is contemplated that so that teeth portion is shortened, but need to reduce coil thus
The number of turns or so that the line footpath of coil is attenuated, may cause motor efficiency reduction.
But, the structure of patent document 2 and patent document 3 considers air-cooled do not give of motor, is carrying out path
In the case where change, motor cannot be fully cooled, may cause motor efficiency reduction.
The present invention proposes to solve the above-mentioned problems, provides a kind of the electronic of the miniature high-speed for improving motor efficiency
Machine and the electric fan and electric vacuum cleaner for using it.
Technical means to solve problem
To solve the above-mentioned problems, motor of the invention includes: stator comprising the iron core of hollow cylindrical, and will
Wrapping conductors coil obtained from the iron core；It is opposite with the inner coil of the stator and rotatably configured forever
Magnet rotor, in the outside of the stator configured with the holding stator and the internal retainer for cavity.
Invention effect
According to the present invention, motor is made to realize path using the slotless configuration of no tooth core, and for wound on stator iron
The coil of inside is used for the driving of motor by coil in the heart, and the coil in outside is played as the radiator for heat dissipation
Effect, thereby, it is possible to obtain improving the motor of the miniature high-speed of motor efficiency and inhaled using its electric fan and electricity
Dirt device.
Detailed description of the invention
(a), (b) of Fig. 1 are the perspective views of the motor of an embodiment of the present invention.
Fig. 2 is a part of the stator structure in the motor of an embodiment of the present invention.
Fig. 3 is the sectional view of the motor of an embodiment of the present invention.
(a), (b), (c) of Fig. 4 be intended to indicate that the another way of the superiority of an embodiment of the present invention stator and
The perspective view and sectional view of motor.
(a), (b) of Fig. 5 are the perspective view and sectional view of the motor of an embodiment of the present invention.
Fig. 6 is the perspective view of the motor of an embodiment of the present invention.
(a), (b) of Fig. 7 are the perspective view and sectional view of the motor of an embodiment of the present invention.
(a), (b), (c) of Fig. 8 are the perspective view and sectional view of the motor of an embodiment of the present invention.
Fig. 9 is the sectional view of the motor of an embodiment of the present invention.
Specific embodiment
Fig. 1 is the stator of the motor of an embodiment of the present invention and the perspective view of rotor.
Motor shown in FIG. 1 is so-called slot-less motor.It is characterized in that in slot-less motor structure, stator
Iron core (iron core) do not have tooth, the surface of coil is exposed to the clearance plane opposite with rotor.In Fig. 1, motor 100 is by nothing
52 structure of retainer of rotor 50 and configuration on the outside of slot-less stator 51 of slot type stator 51, configuration on the inside of slot-less stator 51
At.Rotor 50 includes rotor permanent magnet 1 and main shaft 2.As the material of rotor permanent magnet 1, it is able to use samarium iron nitrogen magnet, neodymium magnetic
Body, ferrimagnet etc..In addition, in order to prevent high speed rotation when magnet occur damaged, can be protected with cover 3.As cover 3
Material is able to use SUS, CFRP etc..Fig. 2 is a part of the slot-less stator 51 in assembling process.Slot-less stator 51 wraps
Include segmentation slot-less stator core 4, stator coil 5 and stator coil frame 6.Slot-less stator 51 passes through will be as the stator of conductor
Coil 5 is inserted in segmentation slot-less stator core 4 and group on stator coil frame 6, and by multiple obtained components that wind
Dress is constituted.The segmentation slot-less stator core 4 of Fig. 2 is obtained from being divided into 2 parts as cylindric iron core, but dividing number can
To be arbitrary.In addition, can be fixed after assembling using resin moulded.Retainer 52 is by inboard cage 7 and outside
Retainer 8 is constituted, and is cavity between inboard cage 7 and outboard cage 8, is constituted the flow path of air.By being formed as slotless
Structure can obtain small-sized, high speed the structure suitable for dust catcher brushless motor.
Fig. 2 is the sectional view of Fig. 1 (b).In an embodiment of the present invention, as shown in (b) and Fig. 2 of Fig. 1, stator line
Circle 5 is configured to have such direction, that is, when electric current flows in stator coil 5, magnetic flux is by segmentation slot-less stator iron
It circulates on the circumferencial direction for the cylindric stator core 11 that the heart 4 assembles.In addition, stator coil 5 includes U phase coil, V phase
Coil, W phase coil, the electric current flowed in each phase coil is the three-phase alternating current for being respectively provided with 120 degree of phase differences.Scheme in Fig. 3
The magnet that the rotor permanent magnet 1 shown uses 4 poles configures, with the side adjacent with rotor permanent magnet S pole 1b rotor permanent magnet N pole 1a
Formula configuration.The stator coil 5 illustrated in Fig. 3 is when with cross-section observation, by 12 inner coils 9 opposite with rotor permanent magnet 1
It is constituted with 12 outer coils 10 supported by inboard cage 7.Each coil is connected to, when the section of 1 U phase coil is located at
The inner coil at 270 degree of inner coil Ub14 and offset when the position of inner coil Ua13, at 90 degree of clockwise
In Ud16, with the electric current reverse flow in the axial direction of phase.And it connects into, at relative to inner coil Ua offset 180 degree
In inner coil Uc15, the electric current of same phase co-flow in the axial direction.About V phase coil, W phase coil, also wrong respectively
It opens and is similarly connected on 120 degree of position.UVW shown in Fig. 3 respectively indicates the flowing of the electric current of same phase ,+and-indicate electricity
The flow direction of stream is opposite in the axial direction.Coil with phase can be connected in series, and also can be connected in parallel.Utilize the configuration, inside cord
The electric current flowed in circle 9 generates rotating excitation field, and rotor 50 rotates, and generates torque.
12 inner coils 9 are respectively provided with pairs of outer coil 10, as shown in (b) of Fig. 1, pairs of inner coil 9
It is connected at end turn 17 with outer coil 10, in pairs of inner coil 9 and outer coil 10, the electric current with phase is in axis
Upward reverse flow.End turn 17 is located above the paper of diagram and below paper (not shown).Outer coil 10 is to torque
Be produced without contribution, kept by inboard cage 7, and between inboard cage 7 and outboard cage 8 be cavity, constitute
The flow path of air.The air that inboard cage 7 is flowed is cooling, so that outer coil 10 is cooled.Outer coil 10 is in coil
End 17 is connect with inner coil 9, and since outer coil 10 is cooled, therefore inner coil 9 is also cooled, can be cooling from inside
Slot-less motor 100.Although outer coil 10 is produced without contribution to torque, can play a role as radiator.
Since motor temperature reduces, magnet residual magnetic flux density increases, and coil resistance reduces, so that copper loss reduces, motor efficiency
Improved.
Slot-less stator 51 is fixed on inboard cage 7 such as by mode resin bonding.If stator coil 5 with it is interior
Then cooling effect is higher for the contact of side retainer 7, but there may also be resins etc. between stator coil 5 and inboard cage 7.Make
For the material of inboard cage 7 and outboard cage 8, it is able to use metal, resin or uses both, wherein using gold
Cooling effect is higher when category.
As the material of stator coil, it is able to use copper, aluminium.In addition, the material as stator core, is able to use with iron
Electromagnetic steel plate as main component.As shown in figure 4, if instead of embodiment slot-less stator 51, using with teeth portion 19
The stator 61 of the structure of the coil 5 of fixed number is wound in the teeth portion 19 of stator core 18, then will be formed and protected by inboard cage 7
Hold the structure of stator core 18.At this point, thermal conductivity ratio copper, the aluminium due to iron are low, cooled down compared with the structure of the present embodiment
Effect is lower.
Then illustrate second embodiment of the present invention.Fig. 5 indicates the retainer of the motor of an embodiment of the present invention
The variation of structure.Fig. 5 is the perspective view and sectional view for indicating the electric motor structure of the present embodiment.Implement with shown in Fig. 1~3
Mode the difference lies in that inboard cage 7 and outboard cage 8 are connected by beam 20.By being kept using the connection of beam 20 inside
Frame 7 and outboard cage 8, the heat that slot-less motor 100 generates are easy to be transferred to outboard cage 8.In this configuration, it utilizes
The cooling inboard cage 7 of the air of flowing, outboard cage 8 and beam 20, so as to cooling slot-less motor 100.With Fig. 1
~3 embodiment is compared, and the air cooled surface area flowed increases, therefore cooling effect is higher.Material as beam 20
Material, is able to use metal, resin etc., wherein the cooling effect of metal is higher.Beam 20 can be used as inboard cage 7, outside is protected
The individual components assembling except frame 8 is held, can also be formed with certain one or both in inboard cage 7 and outboard cage 8
It is integrated.(a) of Fig. 5, which is illustrated, all has the structure of beam 20 shown in (b) of Fig. 5 but it is also possible to be one in arbitrary section
The section divided does not have the structure of beam 20 as shown in Figure 3.It is also possible to shown in section and Fig. 3 shown in 5 (a) with beam 20
The structure that is alternately present of the ground of the section multilayer without beam 20.The quantity of beam 20 can be arbitrary, but quantity is more, then got over
It is easy from inboard cage retainer heat transfer outward, therefore cooling effect is higher.
Then illustrate third embodiment of the present invention.Fig. 6 indicates the retainer of the motor of an embodiment of the present invention
The variation of structure.Fig. 6 is the perspective view for indicating the electric motor structure of the present embodiment.Not with embodiment shown in Fig. 1~3
It is that there is the end-rack 21 that inboard cage 7 is connected with outboard cage 8 in the end face of motor with point.In end-rack 21,
Gap 22 is provided in order to flow air in the cavity between inboard cage 7 and outboard cage 8.Inboard cage
7 and outboard cage 8 connected by end-rack 21, thus slot-less motor 100 generate heat be easy to be transferred to outboard cage
8.In this configuration, using the cooling inboard cage 7 of the air of flowing, outboard cage 8 and end-rack 21, so as to cooling nothing
Slot type motor 100.Compared with the embodiment of Fig. 1~3, the air cooled surface area flowed increases, therefore cooling effect
Fruit is higher.As the material of end-rack 21, it is able to use metal, resin etc., wherein the cooling effect of metal is higher.The section of Fig. 6
Structure can be the structure shown in Fig. 3 without beam 20, be also possible to the structure shown in (b) of Fig. 5 with beam 20.It can also
To be the knot that shown in Fig. 5 (b) there is the section of beam 20 and the section multilayer shown in Fig. 3 without beam 20 to be alternately present
Structure.What Fig. 6 was indicated is only to have the structure of end-rack 21 in unilateral end face, but can also have end-rack 21 in both ends of the surface.In addition,
By using the structure for doubling as bearing retainer by end-rack 21, also have the effect of carrying out bearing portion cooling.
Then illustrate the 4th embodiment of the invention.Fig. 7 indicates the retainer of the motor of an embodiment of the present invention
The variation of structure.Fig. 7 is the perspective view for indicating the electric motor structure of the present embodiment and the sectional view of a part.With the institute of Fig. 1~3
The embodiment shown the difference lies in that the section of the top half of paper such as Fig. 7 (b) shown in do not have inboard cage 7,
And inboard cage 7 shown in (b) of the section of the lower half portion of paper with Fig. 3 or Fig. 5.It, can by using the structure
It is cooling using the directly cooling outer coil 10 of the air of flowing while keeping slot-less stator 51 using inboard cage 7
Effect improves.Shown in Fig. 7 is to be divided into 2 layers of structure by the presence or absence of inboard cage 7 but it is also possible to be multilayered structure,
Section shown in (b) of middle Fig. 3, Fig. 5, (b) of Fig. 7 occurs at random.
Then illustrate the 5th embodiment of the invention.Fig. 8 shows the stator lines of the motor of an embodiment of the present invention
The variation of coil structure and retainer structure.(a) of Fig. 8 and (b) of Fig. 8 be indicate the present embodiment electric motor structure it is vertical
Body figure, (a) of Fig. 8 are the motor before assembling, and (b) of Fig. 8 is the motor after assembling.In addition, (c) of Fig. 8 is to indicate this
The sectional view of the electric motor structure of embodiment.With embodiment shown in Fig. 1~3 the difference lies in that stator coil frame 6 has
It is extended to radial outside, compared to the stator coil frame protrusion 22 of the outer diameter protrusion of stator coil 5, and in inboard cage 7
Inside has the inboard cage recess portion 23 chimeric with stator coil frame protrusion 22.By using the structure, it is able to carry out slotless
The positioning and fixation of formula stator 51 and inboard cage 7.In addition, passing through the use when carrying out resin moulded to slot-less stator 51
Mold in recess portion, positioning and fixation when stator coil frame protrusion 22 can be applied to resin moulded are set.
Then illustrate sixth embodiment of the invention.The unilateral side of the motor end of any structure shown in Fig. 1~8
The impeller of main shaft 2 is fixed in configuration, and outboard cage 8 is made to have the function of diffuser (diffuser), by using in this way
Structure, foring from the side for being provided with impeller makes air force the conduct flowed between retainer 7 and diffuser inwardly
The structure of electric fan.By making air force air between retainer 7 and diffuser inwardly, the cold of motor can be improved
But efficiency.
As described above, can be obtained by the way that any one electric fan of first~sixth embodiment is used for electric vacuum cleaner
Miniaturization, the high efficiency of electric vacuum cleaner.In addition, the motor blower diameter very little, therefore be laid out --- i.e. in electric dust suction
In device which place configuration --- on freedom degree height, for example, fibre can be constituted by the inside for being placed on conduit part, hose sections
Thin electric vacuum cleaner.
In addition, any embodiment as first~sixth embodiment, illustrate the number of poles of magnet be 4, coil number 12
3 phase drive motor the case where, but be also able to use that magnet number of poles is 2n, (wherein n is nature for combination that coil number is 6n
Number), such as can be, the number of poles of magnet is 2 and coil number is 6 or the number of poles of magnet is 6 and coil number is 18 etc..In addition,
The number of poles that can be magnet is 2n and coil number is 12n etc..Fig. 9 illustrates the reality when number of poles of magnet is 2 and coil number is 12
Apply example.When using the structure, make adjacent coil two-by-two with phase as shown in Figure 9.In addition it is also possible to be the number of poles of magnet
For 2n and singlephase drive motor that coil number is 2n.
Description of symbols
1 rotor permanent magnet, the pole 1a rotor permanent magnet N, the pole 2b rotor permanent magnet S, 2 main shafts, 3 covers, 4 segmentation slotlesses
Formula stator core, 5 stator coils, 6 stator coil framves, 7 inboard cages, 8 outboard cages, 9 inner coils, outside 10
Lateral coil, 11 stator cores, 12 cavitys, 13 inner coil Ua, 14 inner coil Ub, 15 inner coil Uc, 16 inside cords
Ud is enclosed, 17 end turns, 18 stator cores, 19 teeth portion, 20 beams, 21 end-rack, 22 stator coil frame protrusions, 23 insides are protected
Hold frame recess portion, 50 rotors, 51 slot-less stators, 52 retainers, 61 stators, 100 slot-less motors, 101 motor.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-229805 | 2017-11-30 | ||
| JP2017229805A JP2019103201A (en) | 2017-11-30 | 2017-11-30 | Slotless electric motor and electric blower and vacuum cleaner using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109861481A true CN109861481A (en) | 2019-06-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811024549.9A Pending CN109861481A (en) | 2017-11-30 | 2018-09-04 | Slotless electric motor and electric blower and electric vacuum cleaner using same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2019103201A (en) |
| CN (1) | CN109861481A (en) |
| TW (1) | TWI678053B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833531A (en) * | 2024-03-05 | 2024-04-05 | 浙江大学 | Slotless motor coil framework |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022038053A (en) * | 2020-08-26 | 2022-03-10 | 日立グローバルライフソリューションズ株式会社 | Vacuum cleaner |
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- 2017-11-30 JP JP2017229805A patent/JP2019103201A/en active Pending
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- 2018-09-04 CN CN201811024549.9A patent/CN109861481A/en active Pending
- 2018-09-04 TW TW107130982A patent/TWI678053B/en active
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| JPH06261471A (en) * | 1993-03-04 | 1994-09-16 | Seiko Epson Corp | Motor and manufacture thereof |
| JP2007196363A (en) * | 2005-12-27 | 2007-08-09 | Hitachi Koki Co Ltd | Electric tool |
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| CN202817997U (en) * | 2012-08-10 | 2013-03-20 | 淮北凯特精工机械电子科技有限公司 | Motor cooling device of explosion suppression type mining wet dust collector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019103201A (en) | 2019-06-24 |
| TW201926856A (en) | 2019-07-01 |
| TWI678053B (en) | 2019-11-21 |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Tokyo, Japan, Japan Applicant after: Hitachi Global Living Program Co., Ltd. Address before: Tokyo, Japan, Japan Applicant before: Hitachi Household Electric Appliance Co. |
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| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20210910 |