CN101090210A

CN101090210A - Fan and its inner rotor motor

Info

Publication number: CN101090210A
Application number: CNA2006100917980A
Authority: CN
Inventors: 篮重凯; 陈弘琪; 庄德财
Original assignee: Delta Optoelectronics Inc
Current assignee: Taida Electronic Industry Co Ltd; Delta Optoelectronics Inc
Priority date: 2006-06-12
Filing date: 2006-06-12
Publication date: 2007-12-19

Abstract

This invention discloses an internal rotor motor including a shell, a stator structure, a rotor structure and a drive device, in which, the stator structure includes a magnetic conduction element, the rotor structure includes a shaft and a magnetic element, and the shaft passes through the shell, the magnetic element jackets the shaft and set corresponding to the magnetic conduction element connected with the drive device, and the stator and rotor structures and the drive device are put in the shell. This invention also discloses a fan including the internal rotor motor and vanes connected with the shaft.

Description

Fan and inner rotor motor thereof

Technical field

The present invention relates to a kind of fan and motor thereof, relate in particular to a kind of fan and inner rotor motor thereof of inner rotor core.

Background technology

Motor is a kind of parts that convert electrical energy into mechanical energy, and it has been widely used in the mechanical structure of daily life.Motor of a great variety wherein is broadly divided into brushless motor and brush motor.

Please refer to Fig. 1.Fig. 1 shows existing brushless motor 1, and it can be used for the impeller rotation of drive fan.Brushless motor 1 comprises bearing pedestal 10, rotor structure 11, stator structure 12 and circuit board 13.Bearing pedestal 10 comprises central siphon portion 101 and at least one bearing 102, bearing 102 is placed in the central siphon portion 101, rotor structure 11 comprises rotating shaft 111, magnetic conduction shell 112 and magnetic element 113, rotating shaft 111 is embedded at magnetic conduction shell 112, magnetic element 113 is located on the inwall of magnetic conduction shell 112, and bearing 102 is placed in the rotating shaft 111, stator structure 12 comprises a plurality of coil groups 121, these coil groups 121 are provided with corresponding to magnetic element 113, circuit board 13 wears central siphon portion 101 and is placed on the bearing pedestal 10, by means of the sense of current of circuit board 13 drive coil groups 121, the magnetic element 113 generation the action of a magnetic fields with rotor structure 11 make rotor structure 11 rotations.

During fan running, brushless motor 1 part presents external rotating, is considered as the external rotor form, yet, the structure of this kind brushless motor 1, because the matched in clearance between each member is more, therefore, its sealing property is not ideal enough, makes that its protection effect is relatively poor.For example there are many clearance G in 10 of rotor structure 11 and bearing pedestals, so the foreign matter of external environment or aqueous vapor etc. enter in the motor configuration by clearance G easily, influence the function of member, thereby reduce the useful life of motor.

Given this, provide a kind of good seal performance, can protect effectively that each member of motor and then the fan that can increase the service life and inner rotor motor thereof are real to be one of important topic.

Summary of the invention

In view of the above, the fan and the inner rotor motor thereof that the purpose of this invention is to provide a kind of good seal performance.

For realizing described purpose, inner rotor motor provided by the invention comprises: housing, stator structure, rotor structure and drive unit.Stator structure comprises magnetic conductive component; Rotor structure comprises rotating shaft and magnetic element, and rotating shaft is arranged on the housing; Magnetic element is placed in the rotating shaft and corresponding setting with magnetic conductive component; Drive unit and magnetic conductive component electrically connect, and wherein, stator structure, rotor structure and drive unit all are placed in the housing.

For realizing described purpose, fan provided by the invention comprises: inner rotor motor and impeller.Inner rotor motor comprises housing, stator structure, rotor structure and drive unit.Stator structure comprises magnetic conductive component; Rotor structure comprises rotating shaft and magnetic element, and rotating shaft is arranged on the housing, and magnetic element is placed in the rotating shaft and corresponding setting with magnetic conductive component; Drive unit and magnetic conductive component electrically connect, and wherein, stator structure, rotor structure and drive unit all are placed in the housing; Impeller is connected with rotating shaft.

As mentioned above; fan of the present invention and inner rotor motor thereof utilize the ccontaining stator structure of housing, rotor structure and drive unit; the outer-rotor structure of brushless motor is given internal rotorization; thereby can improve the efficient and the reliability of brushless motor; the motor configuration of good seal performance can also be provided simultaneously; except that the protective value that can improve, can also save the motor lid to internal structure.

Description of drawings

Fig. 1 is the schematic diagram of existing brushless motor;

Fig. 2 is the decomposing schematic representation of the inner rotor motor of the present invention's one preferred implementation;

Fig. 3 is a combination schematic diagram shown in Figure 2;

Fig. 4 is the fan schematic diagram of the present invention's one preferred implementation.

Description of reference numerals

1 brushless motor, 10 bearing pedestals

101 central siphon portions, 102,25 bearings

11,23 rotor structures, 111,231 rotating shafts

112 magnetic conduction shells, 113,232 magnetic elements

12,22 stator structures, 121 coil groups

13 circuit boards, 2 inner rotor motors

21 housings, 211 first housings

212 second housings, 213 accommodation spaces

214 louvres, 221 magnetic conductive components

24 drive units, 3 fans

30 impellers, 31 wheel hubs

32 flabellums

Embodiment

Fan and inner rotor motor thereof hereinafter with reference to relevant drawings explanation the present invention one preferred implementation.Part identical in the accompanying drawing will be represented with identical Reference numeral.

Please refer to Fig. 2 and Fig. 3, the inner rotor motor 2 of the present invention's one preferred implementation comprises housing 21, stator structure 22, rotor structure 23 and drive unit 24.

In the present embodiment, housing 21 is interconnected to constitute accommodation space 213 by first housing 211 and second housing 212, and wherein, the material of first housing 211 or second housing 212 is metal or plastics.In addition, as shown in Figure 2, first housing 211 or second housing 212 comprise at least one louvre 214, in order to disperse the heat that is produced when inner rotor motor 2 turns round.

Stator structure 22 comprises the magnetic conductive component 221 that is located on second housing, 212 inwalls, and wherein magnetic conduction magnetic conductive component 221 can comprise at least one silicon steel sheet and at least one coil, and coil is wound in (not shown) on the silicon steel sheet.

Rotor structure 23 is placed in the accommodation space 213 of housing 21, rotor structure 23 comprises rotating shaft 231 and magnetic element 232, magnetic element 232 be placed in the rotating shaft 231 and with magnetic conductive component 221 corresponding settings, rotating shaft 231 is arranged in first housing 211 and exposes at least a portion of rotating shaft 231, as the driving shaft that connects other member.In the present embodiment, magnetic element 232 is at least one permanent magnet, and the coil of energising back magnetic conductive component 221 produces the action of a magnetic field with the magnetic element 232 of corresponding setting.

Drive unit 24 also is placed in the accommodation space 213, and drive unit 24 and magnetic conductive component 221 electric connections, in order to control the particularly sense of current of coil of magnetic conductive component 221, to produce alternating magnetic fields with magnetic element 232 and to order about rotor structure 23 and rotate.In the present embodiment, drive unit 24 is a circuit board, according to the difference of structural design, the set-up mode of drive unit 24 can be arranged between first housing 211 and the stator structure 22 by rotating shaft 231 is passed, or is arranged between second housing 212 and the stator structure 22.

As shown in Figure 3, the inner rotor motor 2 of present embodiment also comprises at least one bearing 25, and it is set in the housing 21 and is sheathed on outside the rotating shaft 231, rotates in order to supporting revolving shaft 231 smooth-goingly.In the present embodiment, bearing 25 can be oiliness bearing or ball bearing.

As shown in Figure 4, the fan 3 of the present invention's one preferred implementation comprises inner rotor motor 2 and impeller 30.In the present embodiment, fan 3 is an onboard fan.Wherein, inner rotor motor 2 has been described in detail in aforementioned embodiments, so repeat no more.

Impeller 30 comprises wheel hub 31 and a plurality of flabellum 32, these flabellums 32 are located on the periphery of wheel hub 31, the wheel hub 31 part rotating shaft 231 outer with exposing housing 21 is connected, and rotation impeller 30 rotations by inner rotor motor 2 cause air flows, thereby reach the purpose of for example dispelling the heat.

In sum; because of fan of the present invention and inner rotor motor thereof utilize the ccontaining stator structure of housing, rotor structure and drive unit; outer-rotor structure internal rotorization with brushless motor; thereby can realize the high efficiency and the high-reliability of brushless motor; the motor configuration of good seal performance can be provided simultaneously; except that the protective value that can improve, also can save the motor lid to internal structure.

Compared with prior art, owing to rotor structure relative stator structure of the present invention is rotated in housing, Extraneous aqueous vapor or foreign matter can not brought in the motor configuration by air-flow, thereby can effectively protect motor Each member, and then the service life that can improve fan and motor thereof. In addition, because rotor structure Magnetic conductive component is sheathed in the rotating shaft, and therefore, case material of the present invention for example can be plastics, and elephant not The magnetic conduction shell of existing brushless motor like that must as the magnetic conduction function of the magnetic element of rotor structure because of need Must adopt metal material to consist of, thereby can effectively reduce overall weight and the cost of motor, meet now Electronic equipment is towards the trend of compactization development.

The above only is illustrative, rather than limitation of the present invention. So, do not exceeding this Any under the design of invention and the protection domain prerequisite is equal to remodeling or conversion and all should falls into appended right and want Ask in the claimed scope.

Claims

1. inner rotor motor comprises:

One housing;

One stator structure, it comprises a magnetic conductive component;

One rotor structure, it comprises a rotating shaft and a magnetic element, and this rotating shaft is arranged in described housing, and described magnetic element is sheathed in the described rotating shaft, and corresponding setting with described magnetic conductive component; And

One drive unit, itself and described magnetic conductive component electrically connect, and described stator structure, rotor structure and drive unit are placed in the described housing.

2. inner rotor motor as claimed in claim 1, wherein, described housing is interconnected by first housing and second housing and forms.

3. inner rotor motor as claimed in claim 2, wherein, the material of described first housing or second housing is metal or plastics.

4. inner rotor motor as claimed in claim 2, wherein, described first housing or second housing comprise at least one louvre.

5. inner rotor motor as claimed in claim 2, wherein, described drive unit is passed by described rotating shaft, and it is between described first housing and described stator structure, or between described stator structure and described second housing.

6. inner rotor motor as claimed in claim 1 wherein, also comprises at least one bearing, and it is positioned at described housing and is sheathed in the described rotating shaft.

7. inner rotor motor as claimed in claim 1, wherein, described drive unit is a circuit board.

8. fan comprises:

One inner rotor motor, it comprises a housing, a stator structure, a rotor structure and a drive unit, described stator structure comprises a magnetic conductive component, described rotor structure comprises a rotating shaft and a magnetic element, described rotating shaft is arranged in described housing, described magnetic element is sheathed on described rotating shaft and corresponding setting with described magnetic conductive component, and described drive unit and described magnetic conductive component electrically connect, and described stator structure, rotor structure and drive unit are placed in the described housing; And

One impeller, it is connected with described rotating shaft.

9. fan as claimed in claim 8, wherein, described housing is interconnected by one first housing and one second housing and forms.

10. fan as claimed in claim 9, wherein, the material of described first housing or second housing is metal or plastics.

11. fan as claimed in claim 9, wherein, described first housing or second housing comprise at least one louvre.

12. fan as claimed in claim 9, wherein, described drive unit is passed by described rotating shaft, and it is between described first housing and described stator structure, or between described stator structure and described second housing.

13. fan as claimed in claim 9, wherein, described inner rotor motor also comprises at least one bearing, and it is positioned at described housing, and is placed in the described rotating shaft.

14. fan as claimed in claim 9, wherein, described drive unit is a circuit board.

15. fan as claimed in claim 9, wherein, described fan is an onboard fan.