CN203589994U - Axial magnetic field permanent magnet brushless DC motor - Google Patents

Abstract

The utility model discloses an axial magnetic field permanent magnet brushless DC motor, which comprises a rotating shaft, a bearing, a front end cover, a rear end cover, a casing, a rotor disk, a permanent magnet, a stator, a fixed ring, a sensor magnetic ring and a control circuit board , wherein the stator core is composed of silicon steel sheets and soft magnetic composite materials. The axial magnetic field permanent magnet brushless DC motor of the utility model can not only take advantage of the material saving advantages of the armature iron core motor, but also have the advantages of simple core processing technology, winding The advantages of simple line and high slot full rate.

Description

An axial field permanent magnet brushless DC motor

technical field

The utility model relates to the technical field of motors, in particular to an axial magnetic field permanent magnet brushless DC motor.

Background technique

The existing axial magnetic field permanent magnet brushless DC motors are mainly divided into two types, which are armature ironless motors and armature iron core motors.

In the prior art, the utility model patent 201020696399.9 discloses a double-rotor disc-type brushless motor. The stator of the motor is a disc-type stator winding without iron core; it is equipped with two rotors, which are respectively installed on the shaft. The rotor is located between the front end cover and the stator winding, and the second rotor is located between the rear end cover and the stator winding. Several pairs of permanent magnet poles are fixed on each rotor, and a uniform air gap is maintained between the surface of the stator winding and the surfaces of the permanent magnet poles of the first and second rotors. The armature of this motor has no iron core, no cogging effect, simple processing, small axial size, but generally lower power; at the same power, compared with iron core motors, its radial size is larger and the amount of permanent magnets is increased.

Utility model patent 200420079912.4 discloses a low-voltage high-power permanent magnet brushless DC disc motor. The stator part of the motor is composed of a stator core and a Y-shaped three-phase winding coil. The radial grooves on the end faces of the inlaid winding coils, and the three-phase winding coils are inlaid in the radial grooves insulated from each other according to the Y-shaped distribution principle. The iron core motor can save material because the effective air gap is reduced, but the stator core is made of silicon steel sheet through punching and rolling process, the processing is more complicated, the processing efficiency is relatively low, and the winding is more difficult, and the slot filling rate is low. .

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and to provide a motor that can not only take advantage of the material-saving advantages of the armature iron core motor, but also have the advantages of simple core processing technology, simple winding, and high slot fill rate. Axial field permanent magnet brushless DC motor.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

An axial magnetic field permanent magnet brushless DC motor, including a rotating shaft, a bearing, a front end cover, a rear end cover, a casing, a rotor disk, a permanent magnet, a stator, a fixed ring, a sensor magnetic ring and a control circuit board, the permanent magnet Bonded on the rotor disk to form the main magnetic pole, the rotor disk is fixed on the shaft, the stator is fixed on the fixed ring, the fixed ring is fixed on the casing, the front end cover, the rear end cover and the casing constitute the motor One end of the rotating shaft is installed on the front end cover through a bearing, and the other end of the rotating shaft is installed on the rear end cover through a bearing; the control circuit board is fixed on the rear end cover, and the magnetic ring of the sensor is arranged on the fixed ring and the control circuit board between and fixed on the shaft.

Wherein, the stator is composed of stator teeth, stator yoke, bushings and windings, the windings are concentrated windings, which are directly wound on the bushings, the bushings are made of insulating material and fitted on the stator teeth, and the stator teeth are inserted into the slot in the stator yoke.

Wherein, the stator teeth are made of soft magnetic composite material through powder metallurgy, and the stator yoke is silicon steel sheet.

Wherein, the sensor magnetic ring detects the position of the rotor by cooperating with the Hall position sensor integrated on the control circuit board, and the control circuit board energizes the winding to realize the driving and control of the motor.

The beneficial effects obtained by the utility model are as follows: because the stator has an iron core structure, the effective air gap is reduced, and the amount of permanent magnet materials can be saved; the stator teeth are processed by soft magnetic composite materials through powder metallurgy, and the processing is simple At the same time, raw materials can be saved; the stator core is composed of stator teeth and a stator yoke made of silicon steel sheets, and the assembly process is simple; the winding is a concentrated winding, which is directly wound on the bushing, and the winding is simple and the slot fill rate is high, which can improve the performance of the motor. Efficiency; the control circuit board and the motor are integrated, which improves the compactness of the system.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model axial magnetic field permanent magnet brushless DC motor;

Fig. 2 is a schematic diagram of the stator teeth in the axial magnetic field permanent magnet brushless DC motor of the present invention;

Fig. 3 is a schematic diagram of the bushing in the axial magnetic field permanent magnet brushless DC motor of the present invention;

Fig. 4 is a schematic diagram of the stator in the axial magnetic field permanent magnet brushless DC motor of the present invention.

In the figure: 1-rotating shaft, 2-bearing, 3-front cover, 4-rotor disc, 5-permanent magnet, 6-stator, 7-fixing ring, 8-casing, 9-sensor magnetic ring, 10-control circuit Plate, 11-rear end cover, 12-stator yoke, 13-stator tooth, 14-bush, 15-coil

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the motor structure of the present utility model is: the motor consists of a rotating shaft 1, a bearing 2, a front end cover 3, a rear end cover 11, a casing 8, a rotor disk 4, a permanent magnet 5, a stator 6, a fixed ring 7, The sensor magnetic ring 9 and the control circuit board 10 are composed. The permanent magnet 5 is bonded to the rotor disk 4 to form the main magnetic pole. The rotor disk 4 is fixed on the rotating shaft 1, the stator 6 is fixed on the fixed ring 7, and the fixed ring 7 is fixed on the casing 8. The front end cover 3 and the rear end cover 11 and casing 8 constitute the shell of motor, and one end of rotating shaft 1 is installed on the front end cover 3 by bearing 2, and the other end of rotating shaft 1 is installed on the rear end cover 11 by bearing 2. The control circuit board 10 is fixed on the rear end cover 11 , and the magnetic sensor ring 9 is fixed on the rotating shaft 1 between the fixed ring 7 and the control circuit board 10 . The sensor magnetic ring 9 detects the position of the rotor by cooperating with the Hall position sensor integrated on the control circuit board 10, and the control circuit board 10 energizes the winding to realize the drive and control of the motor.

Fig. 2 shows the stator teeth in the axial field permanent magnet brushless DC motor of the present invention, and Fig. 3 shows the bushing in the axial field permanent magnet brushless direct current motor of the present invention. As shown in FIG. 4 , the stator 6 is composed of stator teeth 13 , a stator yoke 12 , a bush 14 and a winding 15 . The winding 15 is a concentrated winding, which is directly wound on the bushing 14 , the bushing 14 is made of insulating material and fitted on the stator teeth 13 , and the stator teeth 13 are inserted into the slots of the stator yoke 12 .

Although the preferred examples of the present utility model have been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative and not restrictive. Under the enlightenment of the utility model, technicians can also make many forms without departing from the purpose of the utility model and the protection scope of the claims, and these all belong to the protection scope of the utility model.

Claims (4)

1. An axial magnetic field permanent magnet brushless DC motor, comprising a rotating shaft, a bearing, a front end cover, a rear end cover, a casing, a rotor disk, a permanent magnet, a stator, a retaining ring, a sensor magnetic ring and a control circuit board, the The permanent magnets are bonded on the rotor disc to form the main magnetic poles, the rotor disc is fixed on the rotating shaft, the stator is fixed on the fixed ring, the fixed ring is fixed on the casing, the front end cover, the rear end cover and the The casing constitutes the shell of the motor, one end of the rotating shaft is installed on the front end cover through the bearing, and the other end of the rotating shaft is installed on the rear end cover through the bearing; the control circuit board is fixed on the rear end cover, and the sensor The magnetic ring is arranged between the fixed ring and the control circuit board and fixed on the rotating shaft. the 2. The brushless DC motor according to claim 1, wherein the stator is composed of stator teeth, a stator yoke, a bushing and a winding, the winding is a concentrated winding directly wound on the bushing, and the bushing is Insulation material is also fitted over said stator teeth, which are inserted into slots in the stator yoke. the 3. The brushless DC motor according to claim 2, wherein the stator teeth are made of soft magnetic composite material through powder metallurgy, and the stator yoke is silicon steel sheet. the 4. The brushless DC motor according to claim 2 or 3, wherein the magnetic ring of the sensor detects the position of the rotor by cooperating with the Hall position sensor integrated on the control circuit board, and the control circuit board energizes the winding In order to realize the drive and control of the motor. the

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