CN2847669Y

CN2847669Y - Permanent magnet DC brushless motor with sensor

Info

Publication number: CN2847669Y
Application number: CN 200520067208
Authority: CN
Inventors: 黄昕; 倪宗杰
Original assignee: SHENZHEN CANGXINGDA TECHNOLOGY Co Ltd
Current assignee: Chongqing Constar Technology Co., Ltd.; Shenzhen Cangxingda Technology Co., Ltd.
Priority date: 2005-11-05
Filing date: 2005-11-05
Publication date: 2006-12-13
Anticipated expiration: 2015-11-05

Abstract

The utility model relates to a permanent magnet DC brushless motor without a sensor, which comprises a stator assembly (3), an outer rotor assembly (1) and a base (6), wherein the stator assembly (3) comprises an iron core (12) and a lining (15) which is arranged in the center of the iron core, wherein the iron core (12) is provided with a plurality of poles, a coil (13) is coiled on the iron core (12), and bearings (4) are respectively arranged in inner holes which are arranged on both ends of the lining (15). The outer rotor assembly (1) comprises a ring-shaped rotor frame (11), a rotating axis (8), a magnetic yoke (9) and a magnet (10), wherein the rotating axis is fixedly connected with the rotor frame (11) and is overlapped with an axial lead of the rotor frame, the magnetic yoke (9) is arranged on an inner circle of the rotor frame (11), the rotating axis (8) penetrates into the bearings (4), and the rotor frame (11) is movably sheathed on the outer edge of the iron core (12). The base (5) is arranged on one end of the lining (15), and the end corresponds to the iron core (12). The permanent magnet DC brushless motor without a sensor has the advantages of small volume, high rotating speed, no commutation spark disturbance, etc. and can be used for the technical fields of automatic control, robots, medical equipment, model airplanes, toys, etc.

Description

No transducer permanent magnet DC brushless motor

Technical field

The utility model relates to electrical micro-machine, relates in particular to a kind of no transducer permanent magnet DC brushless motor with external rotor.

Background technology

Over year, micromotor is used widely on control automatically, robot, Medical Devices, model airplane, toy surplus in the of nearly ten, but most of for having the miniature magnetic DC motor of brush.There are shortcomings such as interference is big, noise is big, the life-span is short in this motor, while production technology more complicated, and the production cycle is long.In needs long-life, low noise and glitch-free occasion, existing miniature magnetic DC motor just can't satisfy its requirement.

The utility model content

The utility model purpose is to disturb technical problem big, that noise is big, the life-span is short in order to solve existing miniature magnetic DC motor, proposes a kind of no-spark interference, long-life, moment is big, rotating speed is high and lightweight no transducer permanent magnet DC brushless motor.

For solving the problems of the technologies described above, the technical solution of the utility model is a kind of no transducer permanent magnet DC brushless motor of structure, it comprises stator module, external rotor assembly, support, described stator module comprises by stator punching repeatedly presses the stator core that forms, is loaded on the lining in this iron core geometric center hole, the stator punching of described stator core is provided with a plurality of utmost points, wind with coil by suitable connection method on it, the terminal block of three lead-out wires of the described coil of welding is housed on the described lining; Described external rotor assembly comprises the cup-shaped rotor frame, with the rotating shaft fixedly connected and that overlap with its axial line of this rotor rack, be located at yoke and magnet on the described rotor rack inner peripheral surface; The pair of bearings that can place described lining endoporus is housed in the described rotating shaft, and described support is located at an end relative with described iron core on the lining.

The stator punching of described stator core can be provided with 6～12 utmost points.

Described coil can distribute according to polarity and form by three-phase star or triangle connection coiling.

Described stator core is the stator core that has carried out insulation processing.

Described rotor rack is cup-shaped housing, and the center of rotor rack bottom wall body and fixedly connected in it is vertically passed in described rotating shaft.

Described yoke is fixed on the rotor rack annular inner round wall face.

Described magnet steel is the high-performance magnet steel by the polarity distribution of 8～14 pieces watts of shape shapes,, and be fixed on the internal circular surfaces of described yoke.

Described terminal block is processed with the wiring hole that the welding lead-out wire is used on it.

The utility model is made into stator with iron core and coil, and has the external rotor of permanent magnet at stator overcoat one, and magnet adopts high performance material to make, and has that volume is little, power is big, rotating speed is high, efficient is high, characteristics such as electric machine speed regulation performance and perfect heat-dissipating.Because brushless contact and do not have transducer, have the life-span long, noise is little and characteristics such as non-commutation spark interference, and compact conformation, reliable operation is suitable in enormous quantities, high efficiency production.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, wherein:

Fig. 1 is the three-dimensional explosive view of the utility model preferred embodiment;

Fig. 2 is the cutaway view of the utility model preferred embodiment;

Fig. 3 is the cutaway view of the utility model preferred embodiment external rotor assembly;

Fig. 4 is the left view of Fig. 3;

Fig. 5 is the cutaway view of the utility model preferred embodiment stator module.

Embodiment

Fig. 1, Fig. 2 show the basic structure of the utility model preferred embodiment, described no transducer permanent magnet DC brushless motor, and it comprises stator module 3, external rotor assembly 1.And stator module 3 comprises by stator punching and repeatedly presses stator core 12 and the lining 15 that forms, and the iron core appearance is handled through insulation.The stator punching of described iron core 12 is provided with 9 utmost points, also can choose 6～12 utmost points as required.Iron core is extremely gone up by the three-phase star connection and is wound with coil 13, also can distribute according to polarity and press triangle connection coiling 13.The terminal block 14 (as shown in Figure 5) of 13 3 lead-out wires of coil also is housed on the lining 15, is processed with wiring hole on it.In the described lining 15 two ends endoporus bearing chamber is arranged, wherein be respectively equipped with a bearing 4.

As shown in Figure 3, Figure 4, described external rotor assembly 1 comprise cup-shaped housing rotor rack 11, the rotating shaft 8 of fixedlying connected with this rotor rack 11, be located at yoke 9 and magnet 10 on described rotor rack 11 inner peripheral surfaces.Rotor rack housing 11 can be made by plastics or metal, can make shades of colour by customer requirement.Yoke 9 is fixed on the rotor rack 11 annular inner round wall faces.Magnet steel 10 is high-performance magnet steel, is processed into 14 of tile type, magnetic and becomes 7 pairs of utmost points, is fixed on by N-S polarity on the internal circular surfaces of yoke 9.The piece of magnet steel is several to be chosen according to number of magnetic poles.

External rotor assembly 1 and stator module 3 are assembled up, as shown in Figure 2, an end of rotating shaft 8 is passed pair of bearings 4 in stator module lining 15 endoporus, make rotor rack 11 kinks in the outer rim of iron core 12.Described bearing 4 is accurate high rotating speed bearing, has guaranteed the concentricity of external rotor assembly and stator module cylindrical, so rotor rotation is flexible, is fit to high-revolving requirement.The packing ring 2 and the back-up ring 7 that are provided with in the rotating shaft 8 promptly guarantee the location of rotor assembly 1 and stator module 3 to have guaranteed that again the rotation of external rotor assembly is flexible.The right-hand member cover organic block 6 of lining 15 is fixed tightly on the lining 15.

Its overall dimension of this product is: diameter phi 24～φ 45, height 15～50mm.Rotating part of the present utility model is the external rotor assembly, and does not have transducer, brushless.Work as energized, external rotor assembly 1 just can be relative to rotating with the fixing stator module 3 of support 6 under the effect of magnetic force, and by the left end of rotating shaft 8 torque is exported.This small product size is little, power is big, rotating speed is high, efficient is high, electric machine speed regulation performance and perfect heat-dissipating.Because brushless contact and do not have transducer, have the life-span long, noise is little and characteristics such as non-commutation spark interference, and compact conformation, reliable operation.

Claims

1, a kind of no transducer permanent magnet DC brushless motor, comprise stator module (3), external rotor assembly (1), support (6), it is characterized in that, described stator module (3) comprises by stator punching repeatedly presses the stator core (12) that forms, is loaded on the lining (15) in this iron core geometric center hole, the stator punching of described stator core (12) is provided with a plurality of utmost points, wind with coil (13) by suitable connection method on it, the terminal block (14) of welding described coil (13) lead-out wire also is housed on the described lining (15); Described external rotor assembly (1) comprises cup-shaped rotor frame (11), with this rotor rack (11) rotating shaft (8) fixedly connected and that overlap with its axial line, be located at yoke (9) and magnet (10) on described rotor rack (11) inner peripheral surface; The pair of bearings (4) that can place described lining (15) endoporus is housed in the described rotating shaft (8), and described support (6) is located at lining (15) and is gone up an end relative with described iron core (12).

2, motor as claimed in claim 1 is characterized in that, the stator punching of described stator core (12) is provided with 6～12 utmost points.

3, motor as claimed in claim 2 is characterized in that, described coil (13) distributes according to polarity and forms by three-phase star or triangle connection coiling.

4, motor as claimed in claim 3 is characterized in that, described stator core (12) is for having carried out the stator core of insulation processing.

5, motor as claimed in claim 4 is characterized in that, described rotor rack (11) is cup-shaped housing, and the center of rotor rack (11) bottom wall body and fixedly connected in it is vertically passed in described rotating shaft (8).

6, motor as claimed in claim 5 is characterized in that, described yoke (9) is fixed on the annular inner round wall face of rotor rack (11).

7, motor as claimed in claim 6 is characterized in that, described magnet steel (10) is the high-performance magnet steel by the polarity distribution of 8～14 pieces watts of shape shapes, and is fixed on the internal circular surfaces of described yoke (9).

8, motor as claimed in claim 7 is characterized in that, described terminal block (14) is processed with the wiring hole that the welding lead-out wire is used on it.