CN2437071Y

CN2437071Y - Brushless dc motor

Info

Publication number: CN2437071Y
Application number: CN 00220706
Authority: CN
Inventors: 徐仁荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-14
Filing date: 2000-06-14
Publication date: 2001-06-27
Anticipated expiration: 2010-06-14

Abstract

The utility model relates to a brushless DC motor, which is used for air conditioners, and other devices with strict requirements for noises. The utility model comprises a machine body, a bearing cap, a bearing, a main shaft, a stator, and a rotor, wherein, a magnetic shoe is arranged on the rotor; a chain winding is arranged on the stator; the circumference of the rotor is uniformly provided with a plurality of lug bosses; bulges and flanges are positioned on the magnetic shoe which is sheathed on the lug bosses of the rotor. The utility model has the advantages that the noises of starting and running are low, the structure is simple, the cost of produce is low, and the utility model is especially suitable for cabinet type air conditioners.

Description

Brshless DC motor

The utility model relates to a kind of brshless DC motor, particularly a kind of brshless DC motor that uses on air-conditioning and other must the equipment of strict controlling noise.

Existing air conditioner motor often adopts alternating current machine.But alternating current machine since be AC wave shape in coil, being in operation to produce the alternating electromagnetic noise.On the other hand, the stator of conventional motor often can form the relation of aliging with rotor aborning in the mechanical structure upper surface, and under the electromagnetic field state, often is difficult to keep equal, just has electric motor starting and running noise.

The purpose of this utility model provides a kind of starting and all very low brshless DC motor of running noise.

The technical scheme that realizes above-mentioned purpose is: a kind of brshless DC motor, comprise body, bearing cap, bearing, main shaft, stator and rotor, magnetic shoe is installed on the rotor, the chain type winding is installed on the stator, rotor periphery is distributed with several boss equably, have projection and flange on the magnetic shoe, magnetic shoe is sleeved on the boss of rotor.

After adopting technique scheme, the chain type winding has been installed on the stator, has been formed the non-salient pole structure, the vibration in the time of can making the torque pulsation of brshless DC motor and electric motor starting like this reduces greatly, thereby produces continuous torque, makes electric motor starting and running noise low.Simultaneously, has boss on the rotor, and the magnetic shoe that is enclosed within on the rotor boss has projection and flange, this structure reduces the magnetic resistance between magnetic pole, form the magnetic conductance and the magnetic field even variation of rotor magnetic circuit, thereby produce the air-gap field of even variation, make the flat latent running of motor, correspondingly reduced the noise of running.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 looks cross-sectional schematic for master of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the fiting relation figure of rotor and magnetic shoe;

Fig. 4 is the structural representation of magnetic shoe among Fig. 3;

Fig. 5 is the left view of Fig. 4.

Shown in Fig. 1～5, a kind of brshless DC motor, comprise body 9, bearing cap 7, bearing 5, main shaft 4, stator 1 and rotor 3, magnetic shoe 2 is installed on the rotor 3, chain type winding 8 is installed on the stator 1, rotor 3 peripheries are distributed with several boss 3-1 equably, have projection 2-2 and flange 2-1 on the magnetic shoe 2, and magnetic shoe 2 is sleeved on the boss 3-1 of rotor 3.

As shown in Figure 1, have inserts 6 between bearing cap 7 and the bearing 5, inserts 6 can guarantee the adjusting gap of bearing 5, prolongs the useful life of bearing chamber, the noise when also having reduced electric motor starting simultaneously.

As shown in Figure 1, 2, the bottom side of body 9 is equipped with lining 10 and damping ring 11, can alleviate the vibration when moving after motor is installed like this.

Operation principle of the present utility model is as follows: when a certain winding of motor stator 1 passes to direct current, form the magnetic field of N and S, the rotor 3 of motor forms corresponding locus under three-dimensional state, when change one group of winding energising to stator coil, can form the N and the S utmost point of other different spaces, rotor 3 will find corresponding locus very soon, changes the energising winding of motor stator 1 and so forth according to certain rules, will make motor by certain direction rotation.

The utility model utilizes the stator core of conventional motor, and has adopted the chain type winding, and magnetic shoe utilizes permanent magnetic material, stator and relative rotor displacement space have been increased, make motor move low noise, low vibration, energy-conservation, saving material, and simple in structure, production cost is low.Can be used on AC-less power occasion or the mobile equipment, also can be used for other the transmission that needs low speed, low pulsation, low vibration, low noise, can export bigger moment of torsion, directly drive and need not deceleration device.Use is on the cabinet air-conditioner of having relatively high expectations, and effect is better.

Claims

1, a kind of brshless DC motor, comprise body (9), bearing cap (7), bearing (5), main shaft (4), stator (1) and rotor (3), magnetic shoe (2) is installed on the rotor (3), it is characterized in that: chain type winding (8) is installed on the stator (1), rotor (3) periphery is distributed with several boss (3-1) equably, have projection (2-2) and flange (2-1) on the magnetic shoe (2), magnetic shoe (2) is sleeved on the boss (3-1) of rotor (3).

2, brshless DC motor according to claim 1 is characterized in that: have inserts (6) between bearing cap (7) and the bearing (5).