CN2785242Y

CN2785242Y - Brushless DC motor

Info

Publication number: CN2785242Y
Application number: CN 200520056324
Authority: CN
Inventors: 罗之洪
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-30
Filing date: 2005-03-30
Publication date: 2006-05-31
Anticipated expiration: 2015-03-30

Abstract

The utility model provides a brushless DC motor which comprises a end cover assembly, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are encapsulated by the end cover assembly; the rotor assembly is positioned in the stator assembly; the end cover assembly comprises two end covers and bearings fixed on the end covers. The stator assembly comprises a stator core, and the rotor assembly comprises a rotation shaft, and a magnetic loop which is wound on the rotation shaft; both ends of the rotation shaft are fixed on the bearings, and the rotation shaft rotates around the bearings. The stator core and the magnetic loop generate a magnetic field so the rotor assembly rotates around the stator core.

Description

Brshless DC motor

Technical field

The utility model relates to a kind of motor, refers to a kind of brshless DC motor especially.

Background technology

Existing brush motor switches the electric current of input coil by the mechanical system of commutator and brush, also can reduce frictional resistance if reduce the pressure of brush, but contact resistance has become greatly, even makes to the electrical power of brush contact portion heating also bigger than the electrical power that rotor is rotated.Though the brush motor rotating speed is easy to control, the loss of electric machine is often accelerated in the mechanical break-in of brush and commutator, and makes a noise easily.

In order to address the above problem, provide a kind of simple in structure, make easily, security performance is stable, operation maintenance brshless DC motor easily is necessity with the shortcoming that overcomes prior art in fact.

Summary of the invention

Based on the deficiencies in the prior art, main purpose of the present utility model be to provide a kind of simple in structure, make easily, security performance is stable, operation maintenance is brshless DC motor easily.

In order to achieve the above object, the utility model provides a kind of brshless DC motor, comprise end-cap assembly, stator module and rotor assembly, described end-cap assembly is with stator module and rotor assembly encapsulation, rotor assembly is positioned at stator module, described end-cap assembly comprises two end cap and the bearing that is fixed thereon, described stator module comprises stator core, described rotor assembly includes rotating shaft and twines magnet ring on it, the rotating shaft two ends are fixed on the bearing, and around the bearing rotation, stator core and magnet ring produce magnetic field, make rotor assembly rotate around stator core.

In an embodiment of the present utility model, stator module further comprises casing and insulating trip, and stator core is fixed on the casing, and insulating trip is fixed on the end cap.Described rotor assembly further comprises end ring, and described end ring is fixed in the rotating shaft.Described insulating part periphery is wound with enamelled wire, and wherein, the coiling mode of described enamelled wire is to choose any one kind of them in two magnetic poles, three windings or four magnetic poles, six windings.

In another embodiment of the present utility model, described brshless DC motor also further comprises external connection, and described external connection is drawn by arbitrary end cap, and is connected with plug.

In another embodiment of the present utility model, a kind of brshless DC motor comprises stator module and rotor assembly, described rotor assembly is positioned at stator module, described stator module comprises stator core, described rotor assembly includes rotating shaft and twines magnet ring on it, described rotating shaft is fixed on the stator core, and stator core and magnet ring produce magnetic field, make rotor assembly rotate around stator core.

Compared with prior art, the utility model brshless DC motor is because the effect of commutator and brush is all replaced by electronic loop, and the resistance of electronic loop just is equivalent to contact resistance, has so just reduced resistance and electric noise and mechanicalness noise; Owing to do not had commutator and brush, self-control just is easy to, and can change coil by purposes, is suitable for electric current and increases; The machinery slipper has only bearing, big leap ahead the useful life of motor.In the rotor relevant position, switch with semiconductor switch, the loop of control coil input current direction is arranged in the respective rotor position, motor can not be rotated separately, improve the fail safe of using.Since this electric machine structure compactness, thus all lighter than common electric machine, help light-duty machinery, particularly be applied on the model aircraft.Because the polarity of rotor assembly is judged well, can make corresponding shape by purposes, as: inner-rotor type, outer-rotor type, plane rotor type etc.In addition, this brshless DC motor heat resistance is good, and rotating speed is fast, and starting torsion is big.

For making the utility model easier to understand, further set forth the specific embodiment of the utility model brshless DC motor below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the cutaway view of the utility model brshless DC motor.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.With reference to shown in Figure 1, the utility model brshless DC motor comprises end-cap assembly 1, stator module 2, rotor assembly 3, external connection 4 and plug 5.

Described end-cap assembly 1 is made up of front end housing 10, rear end cap 12 and two bearings 14, by front end housing 10 and rear end cap 12 stator module 2 and rotor assembly 3 are encapsulated, described front end housing 10 and back be short to be covered 12 central authorities and offers round tube hole respectively, by round tube hole and bearing 14 interference fits, described two bearings 14 are individually fixed in the center of front end housing 10 and rear end cap 12.

Described stator module 2 is made up of casing 20, stator core 21 and insulating trip 22.Described casing 20 is formed by two parts symmetrical housing die casting moulding, and described casing 20 is formed a closure casing with described rotor assembly 4 encapsulation with front end housing 10 and rear end cap 12, and described stator core 21 is cylindrical, and it is fixed on the casing 20.

Described insulating trip 2 is fixed in below the front end housing 10, and its outside enamelled wire that twines makes insulating part 2 and rotor assembly 4 mutually insulateds, and wherein, enamelled wire can form by special copper material coiling.The coiling mode of enamelled wire has a variety of, in an embodiment of the present utility model, motor is by winding external connection 4 input currents, the coiling mode can be two magnetic poles, three windings, four magnetic poles, six windings etc., wherein, in case two magnetic poles, three windings are to give the winding input current, will produce magnetic field at once, the N utmost point appears at once, sense of current in winding of 60 degree conversion.Four magnetic poles, six windings then are every 30 degree conversion sense of current in the winding once, and motor has been rotated.

Described rotor assembly 3 is made up of rotating shaft 30, end ring 31 and magnet ring (figure does not show).Wherein, described end ring 31 and magnet ring all are fixed in the rotating shaft 30, and the skin of rotor assembly 3 is enamelled wires of stator module 2, and rotor assembly 3 front ends are fixed on the bearing 14 on the front end housing 10, and the rear end is fixed on the bearing 14 on the rear end cap 12.By the two ends of bearing 14 fixed rotating shafts 30, make rotating shaft 30 to rotate neatly around bearing 14.When electric current was imported, stator core 21 produced a magnetic field with magnet ring, drove rotor assembly 3 and rotated, and had also strengthened the holding capacity of whole machine body simultaneously.

Described external connection 4 generally has three, is interted out by rear end cap 12, and is connected with plug 5.Every external connection 4 is with heat-shrink tube 5 insulation, and every heat-shrink tube 5 is distinguished with different colours, avoids plug 5 and control joint wrong.

Above disclosed only is the preferred embodiment of a kind of brshless DC motor of the utility model, certainly can not limit the interest field of the utility model with this, therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1. brshless DC motor, comprise end-cap assembly, stator module and rotor assembly, it is characterized in that: described end-cap assembly is with stator module and rotor assembly encapsulation, rotor assembly is positioned at stator module, described end-cap assembly comprises two end cap and the bearing that is fixed thereon, described stator module comprises stator core, described rotor assembly includes rotating shaft and twines magnet ring on it, the rotating shaft two ends are fixed on the bearing, and rotate around bearing, stator core and magnet ring produce magnetic field, make rotor assembly rotate around stator core.

2. brshless DC motor as claimed in claim 1 is characterized in that: described stator module further comprises casing and insulating trip, and described stator core is fixed on the casing, and insulating trip is fixed on the end cap.

3. brshless DC motor as claimed in claim 1 or 2 is characterized in that: described rotor assembly further comprises end ring, and described end ring is fixed in the rotating shaft.

4. brshless DC motor as claimed in claim 2 is characterized in that: described insulating part periphery is wound with enamelled wire.

5. brshless DC motor as claimed in claim 4 is characterized in that: the coiling mode of described enamelled wire is to choose any one kind of them in two magnetic poles, three windings or four magnetic poles, six windings.

6. brshless DC motor as claimed in claim 1 is characterized in that: described brshless DC motor further comprises external connection, and described external connection is drawn by arbitrary end cap, and is connected with plug.

7. brshless DC motor, comprise stator module and rotor assembly, it is characterized in that: described rotor assembly is positioned at stator module, described stator module comprises stator core, described rotor assembly includes rotating shaft and twines magnet ring on it, described rotating shaft is fixed on the stator core, and stator core and magnet ring produce magnetic field, make rotor assembly rotate around stator core.