CN1268800A

CN1268800A - Brushless D. C. electric motor

Info

Publication number: CN1268800A
Application number: CN 99103237
Authority: CN
Inventors: 洪银树
Original assignee: Sunonwealth Electric Machine Industry Co Ltd
Current assignee: Sunonwealth Electric Machine Industry Co Ltd
Priority date: 1999-03-26
Filing date: 1999-03-26
Publication date: 2000-10-04
Anticipated expiration: 2019-03-26
Also published as: CN1110886C

Abstract

A brushless DC motor with stator and rotor. The controlled component is used for controlling rotation of the rotor, the pivot is connected in shaft sleeve of the stator which is combined with balance plate made of permeability magnetic material which a shaft hole is cut on by the shaft sleeve. A permanent magnet ring is on the rotor, its diameter is matched with outside diameter of the balance plate, which keeps a fixed distance to the permanent magnet ring and can attract each other correspondently. It can eliminating shaking and noise when the rotor is rotating, thus to increase service life of product.

Description

A kind of brshless DC motor

The present invention relates to the direct current machine field, particularly a kind of brshless DC motor with balanced rotation effect.

Existing direct current machine utilizes the rotor that is provided with the axle center, articulates each other by bearing, axle sleeve between axle center and the stator axis, makes rotor can obtain smooth and easy rotation.

Because the axle center needs assembling with bearing or axle sleeve, therefore, can form the gap after its combination, though this gap is tiny, yet when the axle center rotates carrying permanent magnet and flabellum, impeller or other load, can cause the axle center because the gap form small deflection because of centrifugal force, make the contact-making surface of axle center and bearing form uneven rotation, after permanent the use, the gap of axle center and bearing can be increasing, and the formation deflection, rock, variety of problems such as friction and noise.

Brshless DC motor is widely used in the accurate sci-tech product such as optomagnetic disc player, owing to there is above-mentioned shortcoming, can not satisfy the strict day by day needs of product quality.

Purpose of the present invention is exactly that a kind of brshless DC motor with balancing patch will be provided, and what it produced in the time of eliminating rotor rotation rocks and noise, thereby improves the useful life of product.

The object of the present invention is achieved like this: a kind of brshless DC motor, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, the balancing patch made from permeability magnetic material is provided with axis hole, stator combines by axle sleeve and balancing patch, and rotor is provided with permanent magnet rings, and its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it.

Balancing patch is provided with short slot.

Short slot on the balancing patch is according to the center line left-right symmetric.

A kind of brshless DC motor, comprise stator and rotor, Be Controlled element control rotor rotated, be provided with axle and be articulated in the axle sleeve of stator,, have the axis hole corresponding with circuit board with the balancing patch that permeability magnetic material is made, and be combined on the circuit board that is provided with control element and axis hole, stator is combined by axle sleeve by axis hole with circuit board and balancing patch, and rotor is provided with permanent magnet rings, and its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it.

Circuit board is combined on the substrate.

Balancing patch is fixed between stator and the circuit board.

Balancing patch is provided with short slot.

A kind of brshless DC motor structure, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, the balancing patch made from permeability magnetic material is provided with axis hole, and stator combines by axle sleeve and balancing patch, and rotor is provided with permanent magnet rings, its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it, and rotor is provided with the drive of one.

Balancing patch is combined between circuit board and the stator.

Circuit board is combined on the substrate.

Balancing patch is provided with short slot.

A kind of brshless DC motor structure, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, the balancing patch made from permeability magnetic material is provided with axis hole, and stator combines by axle sleeve and balancing patch, and rotor is provided with permanent magnet rings, its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it, and shaft extension goes out axle sleeve and is combined with actuated element.

Balancing patch is combined on the circuit board, and has axis hole to stretch out for the actuated element on the axle on the circuit board.

Circuit board is combined on the substrate, and substrate has axis hole to stretch out for the actuated element on the axle.

Balancing patch is provided with short slot.

The present invention is owing to taked the balancing patch structure, the balancing patch of being made by epitrochanterian annular permanent magnnet and permeability magnetic material keeps a determining deviation, produces correspondence and inhales mutually, makes rotor can do stable rotation, can not produce deflection, rock, friction and noise, thereby the useful life of improving product.

Fig. 1 is the first embodiment three-dimensional exploded view according to a kind of brshless DC motor of the present invention's proposition;

Fig. 2 is the first embodiment combination section according to a kind of brshless DC motor of the present invention's proposition;

Fig. 3 is the second embodiment three-dimensional exploded view according to a kind of brshless DC motor of the present invention's proposition;

Fig. 4 is the second embodiment combination section according to a kind of brshless DC motor of the present invention's proposition;

Fig. 5 is the 3rd an embodiment three-dimensional exploded view according to a kind of brshless DC motor of the present invention's proposition;

Fig. 6 is the 3rd an embodiment combination section according to a kind of brshless DC motor of the present invention's proposition;

Fig. 7 is the 4th an embodiment three-dimensional exploded view according to a kind of brshless DC motor of the present invention's proposition;

Fig. 8 is the 4th an embodiment combination section according to a kind of brshless DC motor of the present invention's proposition;

Describe the concrete structure and the operation principle of a kind of brshless DC motor that proposes according to the present invention in detail below in conjunction with accompanying drawing.

A kind of brshless DC motor, comprise stator, rotor and balancing patch, balancing patch is fixed on the suitable fixture, and balancing patch is made by the material with magnetic conduction effect, and stator is with axle sleeve or bearing hinge joint rotor, rotor is provided with permanent magnet rings, permanent magnet is inhaled mutually with balancing patch is corresponding, by this suction and then make rotor when rotation, produces an equilibrant force of keeping the rotor stability rotation, and rocking of producing can eliminate rotor rotation time the, noise, thereby the useful life of improving product.

As shown in Figure 1, first preferred embodiment mainly comprises balancing patch 2, stator 3 and rotor 4.

Balancing patch 2 is made by the material with magnetic conduction effect, can be fixed on the appropriate location with any fixing means, and balancing patch 2 itself has axis hole 21 and stator 3 to be passed through by axle sleeve 31.

Stator 3 can be designed to various numbers of poles, and various winding modes form, its centre junction sympodium cover 31, axle sleeve 31 can combine with balancing patch 2, and be fixed on other suitable fixtures, axle sleeve 31 internal diameters are provided with the pivoting member 32 of more than one bearing or tool bearing effect, in order to support or to rotate for axle 41 pivot joints of rotor 4.

Rotor 4 centers are established one 41, and axle 41 articulates with pivot connecting element 32 activities of stator 3, which is provided with an annular groove 42 and connects for setting element 43 buckles such as C type rings, can not deviate from order to restrict rotor 4; Rotor 4 itself is established an annular permanent magnnet 44, and the diameter of permanent magnet 44 is advisable with the diameter that is similar to balancing

patch

2,2 one-tenth small distances of permanent magnet 44 and balancing patch approaching, and be in the corresponding state of inhaling mutually.

As shown in Figure 2, first preferred embodiment in conjunction with situation, stator 3 combines with balancing patch 2, and be fixed on the suitable fixture by axle sleeve 31 in conjunction with stator 3, stator 3 articulates by the axle 41 of pivot connecting element 32 with rotor 4, the permanent magnet 44 of rotor 4 is corresponding with balancing patch 2, control by control elements such as known circuit board and hall sensors, make rotor 4 can start rotation, form the suction mutually of balance by permanent magnet 44 and balancing patch 2, can impel rotor 4 to do stable rotation, rocking and noise in the time of can not producing running, thus electrical machinery life is prolonged.

As shown in Figure 3, second preferred embodiment mainly comprises circuit board 1, balancing patch 5, stator 3 and rotor 4 etc.

Balancing patch 5 is fixed on the circuit board 1, this circuit board 1 can be made by modes such as SMT, circuit board 1 is provided with hall sensor 11 and various control element, make the stator 3 of combination can produce excitatory, make rotor 4 rotations, for making circuit board 1 be fixed on the appropriate location more easily, circuit board 1 can also be fixed on the substrate 12, and circuit board 1 is established axis hole 13 with substrate 12 and combined with the axle sleeve 31 of stator 3.

Balancing patch 5 is made by the material with magnetic conduction effect, can be fixed on the appropriate location with any fixing means, balancing patch 5 itself has axis hole 51 and stator 3 to be passed through by axle sleeve 31, in addition, balancing patch 5 is established short slot 52 and is passed through for Hall elements 11, this short slot 52 can for two and become to be symmetrical set with the center of balancing patch 5 comparatively suitable.

Stator 3 can be designed to various numbers of poles, and various method for winding form, its centre junction has closed an axle sleeve 31, axle sleeve 31 can be fixed on the substrate 12 that is combined with circuit board 1 after balancing patch 5 combines, balancing patch 5 is received is arranged between stator 3 and the circuit board 1.Axle sleeve 31 internal diameters are provided with the pivoting member 32 of more than one bearing or tool bearing effect, in order to support or to rotate for axle 41 pivot joints of rotor 4.

Rotor 4 centers are established one 41, and axle 41 articulates with pivot connecting element 32 activities of stator 3, by annular groove 42 setting element 43 buckles such as C type ring is connected, and can not deviate from order to restrict rotor 4; Rotor 4 itself is established an annular permanent magnnet 44, and the diameter of this permanent magnet 44 is advisable with the diameter that is similar to balancing patch 5, approaching by 5 one-tenth small distances of this permanent magnet 44 and balancing patch, and be in corresponding attracting state.

As shown in Figure 4, second preferred embodiment in conjunction with situation, stator 3 is combined by axle sleeve 31 by axis hole 51 with balancing patch 5, wear circuit board 1 again and combine fixing with substrate 12, stator 3 articulates the axle 41 of rotor 4 by pivot connecting element 32, be connected annular groove 42 by setting element 43 buckles such as C type rings, make the permanent magnet 44 corresponding balancing patches 5 of rotor 4, forming permanent magnet 44 maintains a certain distance with balancing patch 5, and has phase suction, especially when rotor 4 rotates with stator 3 inductions, because permanent magnet 44 and the suction mutually that balancing patch 5 has overall balance can impel rotor 4 to do to stablize rotation and can not rock, can be used on the CD-ROM device like this, as the driving of CD-RW discsCD-RW, form stable rotation.

As shown in Figure 5, the 3rd preferred embodiment mainly comprises balancing patch 2, stator 3 and rotor 6.

Balancing patch 2 is made by the material with magnetic conduction effect, can be fixed on the appropriate location with any fixing means, balancing patch 2 itself has axis hole 21 and stator 3 to be passed through by axle sleeve 31, and whether balancing patch 2 can be provided with short slot according to need, and combines with circuit board 1 or separate selection.

Stator 3 can be designed to various numbers of poles, and various method for winding form, its centre junction has closed axle sleeve 31, axle sleeve 31 can combine with balancing patch 2, and be fixed on other suitable fixtures, axle sleeve 31 internal diameters are provided with the pivoting member 32 of more than one bearing or tool bearing effect, in order to support or to rotate for axle 61 pivot joints of rotor 6.

Rotor 6 centers are established one 61, and axle 61 articulates with the pivot connecting element 32 of stator 3 is movable, are connected by setting element 63 buckles such as annular groove 62 and C type rings, can not deviate from order to restrict rotor 6; Rotor 6 itself is established an annular permanent magnnet 64, and the diameter of this permanent magnet 64 is advisable with the diameter that is similar to balancing patch 2, and is approaching by 2 one-tenth small distances of this permanent magnet 64 and balancing patch, and the formation correspondence is inhaled mutually; Rotor 6 itself has the drive 65 of one, can be by the transmission that is used as power of actuated elements such as belt by drive 65.

As shown in Figure 6, the 3rd preferred embodiment in conjunction with situation, stator 3 combines with balancing patch 2, stator 3 and balancing patch 2 are fixed on the suitable fixture by axle sleeve 31, stator 3 articulates the axle 61 of rotor 6 by pivot connecting element 32, permanent magnet 64 correspondences of rotor 6 are at balancing patch 2, control by known circuit board and control element thereof, make rotor 6 can start rotation, permanent magnet 64 keeps certain spacing with balancing patch 2, especially make to make when induction is rotated permanent magnet 64 and balancing patch 2 when rotor 6 and stator 3 and form the suction mutually of overall balance, impel rotor 6 to do stable rotation, can be applicable to power outputs such as video recorder like this.

As shown in Figure 7, the 4th preferred embodiment mainly comprises balancing patch 2, stator 3 and rotor 7.

Stator 3 can be designed to various numbers of poles, and various method for winding form, its center combines with balancing patch 2 by axle sleeve 31, and be fixed on other suitable fixtures, axle sleeve 31 internal diameters are provided with the pivoting member 32 of more than one bearing or tool bearing effect, in order to support or to rotate for axle 71 pivot joints of rotor 7.

Rotor 7 centers are established one 71, and axle 71 articulates with pivot connecting element 32 activities of stator 3, and passes through annular groove 72 for setting element 73 snappings such as C type rings, can not deviate from order to restrict rotor 7; Rotor 7 itself is established an annular permanent magnnet 74, the diameter of this permanent magnet 74 is advisable with the diameter that is similar to balancing

patch

2,2 one-tenth small distances of this permanent magnet 74 and balancing patch are approaching, and form corresponding phase suction, this 71 length that has than length, can be for 75 combinations of actuated elements such as gear, by the directly output that is used as power of this axle 71.

As described in Figure 8, the 4th preferred embodiment in conjunction with situation, stator 3 is run through by axle sleeve 31 with balancing patch 2 and is fixed on the suitable fixture, stator 3 articulates the axle 71 of rotor 7 by pivot connecting element 32, permanent magnet 74 correspondences of rotor 7 are at balancing patch 2, control by known circuit board and control element thereof, make rotor 7 can start rotation and keep certain spacing by permanent magnet 74 and balancing patch 2, especially when rotor 7 is done the induction rotation with stator 3, can make permanent magnet 74 and balancing patch 2 form the suction mutually of overall balance, impel rotor 7 to do stable rotation, can be applicable to other occasions like this with the output of gear drive power.

Structure according to claim 1 can impel rotor when rotating, by annular permanent magnnet with Balancing patch because having certain spacing, is inhaled mutually and produce correspondence, and this suction makes rotor do stable rotation, no Can generation rock and eccentric friction running, therefore make motor noise reduction, life.

Structure according to claim 9 can impel rotor when rotating, by annular permanent magnnet with Balancing patch produces correspondence and inhales mutually, and this suction makes rotor do stable rotation, and by the transmission of set one on the rotor Wheel can be done power output by belt etc.

Structure according to claim 14 can impel rotor when rotating, by annular permanent magnnet with Balancing patch produces correspondence and inhales mutually, and this suction makes rotor do stable rotation, is done by actuated element set on this axle The direct output of power.

According to

claim

2,7,12,17 described structures, can impel rotor when rotating, by annular Permanent magnet is inhaled mutually with the balancing patch generation is corresponding, and this suction makes rotor do stable rotation, and its balancing patch is set Short slot, can power circuit board on set hall sensor stretch out, and hall sensor is become comparatively with stator The setting that approaches reaches the startup of control rotor.

According to

claim

3,8,13,18 described structures, can impel rotor when rotating, by annular Permanent magnet and balancing patch keep a determining deviation, produce correspondence and inhale mutually, and this suction makes rotor do stable rotation, And set two of its balancing patch becomes symmetrically arranged short slot, and hall sensor set on the circuit board can be provided Stretched out by the one short slot, these two the corresponding short slots that arrange can make rotor when rotating, and are permanent by annular Magnet produces balancing patch and rotatablely moves more stably.

According to claim 4,10,15 described structures, can impel rotor when rotating, by annular forever Magnet and balancing patch keep a determining deviation for a long time, inhale mutually and produce correspondence, and this suction makes rotor do stable rotation; And this balancing patch is bonded between circuit board and the stator, can make circuit board, balancing patch, stator and rotor Form one.

According to

claim

5,6,11,16 described structures, can impel rotor when rotating, by annular Permanent magnet and balancing patch keep certain spacing, inhale mutually and produce correspondence, and this suction makes rotor do stable revolving Turn to; Because circuit board is combined with substrate again, therefore, even if circuit board make with manufactures such as SMT, and Formation is during than flexibility, and it also can directly be combined on the substrate, has suitable hardness, is convenient to install.

Claims

1. brshless DC motor, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, it is characterized in that: the balancing patch made from permeability magnetic material is provided with axis hole, stator combines by axle sleeve and balancing patch, and rotor is provided with permanent magnet rings, and its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it.

2. a kind of brshless DC motor as claimed in claim 1, it is characterized in that: balancing patch is provided with short slot.

3. a kind of brshless DC motor as claimed in claim 2 is characterized in that: the short slot on the balancing patch is according to the center line left-right symmetric.

4. brshless DC motor, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, it is characterized in that: the balancing patch made from permeability magnetic material, have the axis hole corresponding with circuit board, and be combined on the circuit board that is provided with control element and axis hole, stator is combined by axle sleeve by axis hole with circuit board and balancing patch, rotor is provided with permanent magnet rings, and its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it.

5. a kind of brshless DC motor as claimed in claim 4, it is characterized in that: circuit board is bonded on the substrate.

6. a kind of brshless DC motor as claimed in claim 4 is characterized in that: balancing patch is fixed between stator and the circuit board.

7. a kind of brshless DC motor as claimed in claim 4, it is characterized in that: balancing patch is provided with short slot.

8. a kind of brshless DC motor as claimed in claim 7 is characterized in that: the short slot on the balancing patch is according to the center line left-right symmetric.

9. brshless DC motor, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, it is characterized in that: the balancing patch made from permeability magnetic material is provided with axis hole, and stator combines by axle sleeve and balancing patch, and rotor is provided with permanent magnet rings, its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it, and rotor is provided with the drive of one.

10. a kind of brshless DC motor as claimed in claim 9 is characterized in that: balancing patch is combined between circuit board and the stator.

11. a kind of brshless DC motor as claimed in claim 10, it is characterized in that: circuit board is combined on the substrate.

12. a kind of brshless DC motor as claimed in claim 10, it is characterized in that: balancing patch is provided with short slot.

13. a kind of brshless DC motor as claimed in claim 12 is characterized in that: the short slot on the balancing patch is according to the center line left-right symmetric.

14. brshless DC motor, comprise stator and rotor, Be Controlled element control rotor rotated, being provided with axle is articulated in the axle sleeve of stator, it is characterized in that: the balancing patch made from permeability magnetic material is provided with axis hole, and stator combines by axle sleeve and balancing patch, and rotor is provided with permanent magnet rings, its diameter is with keeping external diameter certain distance, the corresponding balancing patch of inhaling mutually of energy to be complementary with it, and shaft extension goes out axle sleeve and is combined with actuated element.

15. a kind of brshless DC motor as claimed in claim 14, it is characterized in that: balancing patch is combined on the circuit board, and has axis hole to stretch out for the actuated element on the axle on the circuit board.

16. a kind of brshless DC motor as claimed in claim 15 is characterized in that: circuit board is combined on the substrate, substrate has axis hole to stretch out for the actuated element on the axle.

17. a kind of brshless DC motor as claimed in claim 15, it is characterized in that: balancing patch is provided with short slot.

18. a kind of brshless DC motor as claimed in claim 17 is characterized in that: the short slot on the balancing patch is according to the center line left-right symmetric.