CN214590824U

CN214590824U - Large-torque coreless permanent magnet motor and flat motor

Info

Publication number: CN214590824U
Application number: CN202120334746.1U
Authority: CN
Inventors: 翁孟坤; 张子茂
Original assignee: Once Top Motor Manufacture Co ltd
Current assignee: Once Top Motor Manufacture Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-02
Anticipated expiration: 2031-02-05

Abstract

The utility model relates to the technical field of electric machine, a big moment coreless permanent-magnet motor and flat motor is disclosed, include: the casing, be equipped with the rotor subassembly that is used for exporting turning torque in the casing, the rotor subassembly includes the commutator, coreless armature winding and rotor holder, commutator and coreless armature winding all bond in rotor holder, be equipped with the motor permanent magnet that is used for providing magnetic field in the casing, the motor permanent magnet includes first permanent magnet and second permanent magnet, the magnetic pole of first permanent magnet and second permanent magnet is opposite, it has the flange that is located the casing and is used for fixed motor permanent magnet to bond on the motor permanent magnet, the one end of casing is equipped with and is used for sealing casing open-ended back lid, the casing all is equipped with on with the back and is used for supporting commutator pivoted bearing, bearing and back lid riveting are fixed, it is used for making things convenient for four carbon brush rooms of motor carbon brush activity to cover afterwards, two liang of 90 degrees settings are covered, be equipped with the motor terminal on the back. The utility model discloses can improve the power density/efficiency of motor.

Description

Large-torque coreless permanent magnet motor and flat motor

Technical Field

The utility model relates to the technical field of electric machine, especially, relate to a big moment coreless permanent-magnet motor and flat motor.

Background

The hollow cup permanent magnet brush motor used in the market at present generally adopts a pair of pole permanent magnets, and the effective flux utilization rate of the permanent magnets is higher than that of an iron core brush motor, but still has a space for further improvement.

In addition, the conventional iron core brush motor structure is widely applied to some low-end application fields. Because of the existence of obvious cogging torque, the vibration and noise of the motor in the running process are obvious, the commutation spark of the motor is large, and the service life of the electric brush is shortened. Therefore, the hollow cup permanent magnet brush direct current motor is used in more application occasions to eliminate the influence of the cogging torque, and the hollow cup permanent magnet brush direct current motor has obvious advantages particularly in high-end application fields.

Therefore, how to improve the power density/efficiency of the motor becomes an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in how to improve the power density/efficiency of motor.

Therefore, according to the first aspect, the embodiment of the utility model discloses a big moment coreless permanent magnet motor, include: a housing, a rotor assembly for outputting a rotation torque is arranged in the housing, the rotor assembly comprises a commutator, a hollow cup armature winding and a rotor support, the commutator and the hollow cup armature winding are both bonded to the rotor support, the commutator is installed on the rotor support, a motor permanent magnet for providing a magnetic field is arranged in the housing, the motor permanent magnet comprises a first permanent magnet and a second permanent magnet, the magnetic poles of the first permanent magnet and the second permanent magnet are opposite, a flange which is positioned in the housing and used for fixing the motor permanent magnet is bonded on the motor permanent magnet, a rear cover for sealing an opening of the housing is arranged at one end of the housing, bearings for supporting the commutator to rotate are arranged on the housing and the rear cover, the bearings and the rear cover are riveted and fixed, and four carbon brush chambers for facilitating the movement of a carbon brush of the motor are arranged on the rear cover, the carbon brush chambers are arranged at 90 degrees in pairs, and the rear cover is provided with a motor terminal.

Optionally, the flange is riveted to the housing.

Optionally, the number of the first permanent magnets and the number of the second permanent magnets are two, and the first permanent magnets and the second permanent magnets are arranged at intervals and are bonded through high-strength glue.

Optionally, the first permanent magnet and the second permanent magnet are both sintered neodymium iron boron permanent magnets.

Optionally, the coreless armature winding adopts a wave winding coil or a lap winding coil, and the number of the slots of the coreless armature winding is 6.

Optionally, the number of the carbon brushes of the electric machine is two or four.

According to a second aspect, the embodiment of the utility model discloses a flat motor is disclosed, include: the casing, be equipped with the rotor subassembly that is used for exporting turning torque in the casing, the rotor subassembly includes commutator, PCB board, coreless armature winding and gasket, the PCB board with the commutator welding, coreless armature winding with the PCB board bonds, be equipped with the motor permanent magnet that is used for providing magnetic field in the casing, the motor permanent magnet includes first permanent magnet and second permanent magnet, first permanent magnet with the magnetic pole of second permanent magnet is opposite, the one end of casing is equipped with and is used for sealing casing open-ended back lid, the casing with it is used for supporting all to cover after the bearing commutator pivoted, the bearing with back lid riveting is fixed, cover after and be equipped with the brush group, cover after and be equipped with the motor terminal, be equipped with the tighrening ring on the casing.

Optionally, the coreless armature winding is formed by splicing a plurality of coils together by precision mould positioning so that the coils form a petal type winding.

Optionally, the rear cover is injection-molded with nylon plastic through the magnetic conductive plate.

The utility model discloses following beneficial effect has: the utility model adopts a 2-pair pole structure, which greatly improves the air gap flux density of the motor, improves the effective flux utilization rate and further obtains higher power density/efficiency; the utility model discloses the distributed winding structure of arrangement structure satisfaction whole pitch groove of coil for the electromagnetic torque that the coil produced is the biggest, and then makes the maximize of motor power density. The electromagnetic structure has symmetry, integral pitch and integral number winding arrangement and only six wire ends, the structure is simple and easy to manufacture, the power density of the motor is maximized, the process is simple due to few wire ends, and the efficiency is higher. Under the same volume condition, the motor has larger power density, higher operating efficiency and lower casing leakage flux. Thereby, the power density/efficiency of the motor can be further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an exploded view of a high torque coreless permanent magnet motor according to the present disclosure;

FIG. 2 is a schematic cross-sectional view of a high-torque coreless permanent magnet motor according to the present disclosure;

FIG. 3 is a schematic diagram of the arrangement of magnetic poles in a high-torque coreless permanent magnet motor disclosed in this embodiment;

FIG. 4 is a schematic structural diagram of a coreless armature winding of a high-torque coreless permanent magnet motor disclosed in this embodiment;

FIG. 5 is a schematic structural diagram of a coreless armature winding of another high-torque coreless permanent magnet motor disclosed in the present embodiment;

fig. 6 is a schematic cross-sectional view of a flat motor according to the present embodiment;

fig. 7 is a schematic view of a rotor assembly in a flat motor disclosed in the present embodiment;

fig. 8 is a schematic view of a partial explosion structure of a flat motor disclosed in the present embodiment;

fig. 9 is a schematic view of a partial explosion structure of a flat motor disclosed in this embodiment.

Reference numerals: 1. a housing; 2. a rotor assembly; 21. a commutator; 22. a coreless armature winding; 23. a rotor support; 24. a PCB board; 25. a gasket; 3. a motor permanent magnet; 31. a first permanent magnet; 32. a second permanent magnet; 4. a flange; 5. a rear cover; 6. a bearing; 7. a motor carbon brush; 8. a motor terminal; 9. an electric brush set; 10. and (5) fastening the ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The embodiment of the utility model discloses big moment coreless permanent-magnet motor, as shown in fig. 1-3, include: a machine shell 1, a rotor assembly 2 for outputting rotation torque is arranged in the machine shell 1, the rotor assembly 2 comprises a commutator 21, a hollow cup armature winding 22 and a rotor support 23, the commutator 21 and the hollow cup armature winding 22 are both adhered to the rotor support 23, the commutator 21 is arranged on the rotor support 23, a motor permanent magnet 3 for providing a magnetic field is arranged in the machine shell 1, the motor permanent magnet 3 comprises a first permanent magnet 31 and a second permanent magnet 32, the magnetic poles of the first permanent magnet 31 and the second permanent magnet 32 are opposite, a flange 4 which is positioned in the machine shell 1 and used for fixing the motor permanent magnet 3 is adhered on the motor permanent magnet 3, one end of the machine shell 1 is provided with a rear cover 5 for sealing an opening of the machine shell 1, a bearing 6 for supporting the commutator 21 to rotate is arranged on the machine shell 1 and the rear cover 5, the bearing 6 is riveted and fixed with the rear cover 5, four carbon brush chambers for facilitating the movement of a motor carbon brush 7 are arranged on the rear cover 5, the carbon brush chambers are arranged at 90 degrees in pairs, and the rear cover 5 is provided with a motor terminal 8. In the specific implementation process, the casing 1 and the flange 4 are both made of soft magnetic materials with high magnetic conductivity. The motor terminal 8 is made of high-conductivity copper material, so that power supply current can pass through the motor terminal conveniently, and the electric loss is reduced. And a copper braid which is conveniently connected with the motor terminal 8 is arranged on the motor carbon brush 7.

It should be noted that the utility model adopts a 2-pair pole structure, which greatly improves the air gap flux density of the motor, improves the effective flux utilization rate, and further obtains higher power density/efficiency; the utility model discloses the distributed winding structure of arrangement structure satisfaction whole pitch groove of coil for the electromagnetic torque that the coil produced is the biggest, and then makes the maximize of motor power density. The electromagnetic structure has symmetry, integral pitch and integral number winding arrangement and only six wire ends, the structure is simple and easy to manufacture, the power density of the motor is maximized, the process is simple due to few wire ends, and the efficiency is higher. Under the same volume condition, the power density is larger, the operation efficiency is higher and the leakage flux of the shell 1 is lower. Thereby, the power density/efficiency of the motor can be further improved.

As shown in fig. 1-3, the flange 4 is riveted to the housing 1.

As shown in fig. 1 to 3, the number of the first permanent magnet 31 and the second permanent magnet 32 is two, and one permanent magnet and the second permanent magnet 32 are arranged at an interval and are bonded by high-strength glue.

As shown in the figure, the first permanent magnet 31 and the second permanent magnet 32 are both sintered ndfeb permanent magnets.

As shown in fig. 1, 4, and 5, the coreless armature winding 22 employs a wave winding coil or a lap winding coil, and the number of slots of the coreless armature winding 22 is 6.

As shown in fig. 1 to 3, the number of the carbon brushes 7 of the motor is two or four. According to the electromagnetic torque principle of the direct current motor, the following results are obtained:

first, electromagnetic torque T_emGenerated by the electric field current i and the magnetic field phi;

the magnitude of the electromagnetic torque has T_em＝C_T*Φ*I_a(N.m)；

③.C_TIn order to be a constant of the torque,

(p is the number of pole pairs, N is the total conductor of the motor windingNumber, a is the number of pairs of parallel branches of the armature coil).

The embodiment of the utility model discloses flat motor, as shown in fig. 6-9, include: casing 1, be equipped with rotor subassembly 2 that is used for exporting turning moment in the casing 1, rotor subassembly 2 includes commutator 21, PCB board 24, coreless armature winding 22 and gasket 25, PCB board 24 and commutator 21 welding, coreless armature winding 22 bonds with PCB board 24, be equipped with the motor permanent magnet 3 that is used for providing magnetic field in the casing 1, motor permanent magnet 3 includes first permanent magnet 31 and second permanent magnet 32, first permanent magnet 31 is opposite with second permanent magnet 32's magnetic pole, the one end of casing 1 is equipped with and is used for sealing casing 1 open-ended back lid 5, all be equipped with on casing 1 and the back lid 5 and be used for supporting commutator 21 pivoted bearing 6, bearing 6 and back lid 5 riveting are fixed, be equipped with brush group 9 on the back lid 5, be equipped with motor terminal 8 on the back lid 5, be equipped with fastening ring 10 on the casing 1. In the implementation process, the bearing 6 can adopt a ball bearing 6 or an oil-containing sliding bearing 6. In the specific implementation process, the commutator 21 comprises a commutator segment, a framework and a rotating shaft, wherein the commutator segment and the rotating shaft are injected into the framework to form a whole. The commutator segment is provided with an exposed welding disc.

As shown in fig. 6-9, the coreless armature winding 22 is formed into a petal winding by precision die positioning to splice together a plurality of coils.

As shown in fig. 6 and 8, the number of the first permanent magnets 31 and the second permanent magnets 32 is two, and the first permanent magnets 31 and the second permanent magnets 32 are arranged at intervals and are bonded by high-strength glue.

As shown in fig. 6 and 9, the rear cover 5 is injection molded with nylon plastic through the magnetic conductive plate.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A high torque coreless permanent magnet motor comprising: a housing (1), be equipped with rotor subassembly (2) that are used for exporting turning torque in housing (1), rotor subassembly (2) include commutator (21), coreless armature winding (22) and rotor bracket (23), commutator (21) with coreless armature winding (22) all bond in rotor bracket (23), commutator (21) install in on rotor bracket (23), be equipped with motor permanent magnet (3) that are used for providing magnetic field in housing (1), motor permanent magnet (3) include first permanent magnet (31) and second permanent magnet (32), first permanent magnet (31) with the magnetic pole of second permanent magnet (32) is opposite, it has to be located to bond on motor permanent magnet (3) in housing (1) and be used for fixing flange (4) of motor permanent magnet (3), the one end of casing (1) is equipped with and is used for sealing casing (1) open-ended hou gai (5), casing (1) with all be equipped with on back lid (5) and be used for supporting commutator (21) pivoted bearing (6), bearing (6) with back lid (5) riveting is fixed, be equipped with on back lid (5) and be used for making things convenient for four carbon brush rooms of motor carbon brush (7) activity, the carbon brush room is two liang of 90 degrees settings, be equipped with motor terminal (8) on back lid (5).

2. A high torque coreless permanent magnet motor according to claim 1, wherein the flange (4) is riveted to the housing (1).

3. A high-torque coreless permanent magnet motor according to claim 1, wherein the number of the first permanent magnet (31) and the second permanent magnet (32) is two, and the first permanent magnet (31) and the second permanent magnet (32) are arranged at an interval and are bonded by high-strength glue.

4. A high torque coreless permanent magnet motor as in claim 3, wherein both said one permanent magnet and said second permanent magnet (32) are sintered ndfeb permanent magnets.

5. A high torque coreless permanent magnet motor according to claim 1, wherein the coreless armature winding (22) is a wave winding coil or a lap winding coil, and the number of slots of the coreless armature winding (22) is 6.

6. A high torque coreless permanent magnet motor according to claim 1, wherein the number of the motor carbon brushes (7) is set to two or four.

7. A flat electric machine, comprising: a housing (1), be equipped with in housing (1) and be used for exporting turning moment's rotor subassembly (2), rotor subassembly (2) includes commutator (21), PCB board (24), coreless armature winding (22) and gasket (25), PCB board (24) with commutator (21) welding, coreless armature winding (22) with PCB board (24) bonds, be equipped with motor permanent magnet (3) that are used for providing magnetic field in housing (1), motor permanent magnet (3) include first permanent magnet (31) and second permanent magnet (32), first permanent magnet (31) with the magnetic pole of second permanent magnet (32) is opposite, the one end of housing (1) is equipped with and is used for sealing housing (1) open-ended back lid (5), housing (1) with all be equipped with on back lid (5) and be used for supporting commutator (21) pivoted bearing (6), the bearing (6) and the rear cover (5) are riveted and fixed, a brush set (9) is arranged on the rear cover (5), a motor terminal (8) is arranged on the rear cover (5), and a fastening ring (10) is arranged on the casing (1).

8. A flat electric machine as claimed in claim 7, characterized in that the coreless armature winding (22) is formed by splicing together a plurality of coils to form a petaloid winding by precision die positioning.

9. The flat motor according to claim 7, wherein the number of the first permanent magnets (31) and the second permanent magnets (32) is two, and the first permanent magnets (31) and the second permanent magnets (32) are arranged at intervals and are bonded by high-strength glue.

10. The flat electrical machine according to claim 7, wherein the back cover (5) is injection molded with nylon plastic through a flux plate.