CN210201681U - Multipurpose three-phase AC permanent magnet outer rotor low-speed synchronous motor - Google Patents

Abstract

The utility model discloses a be applied to multipurpose three-phase alternating current permanent magnetism external rotor low-speed synchronous machine of low-speed motor application, its structure includes shell, electric motor rotor, motor stator and main shaft, the main shaft is worn to overlap in the shell and is realized being connected with the upper end cover of shell and lower end cover through the bearing, the shell is used for connecting external load, motor stator establishes including the cover and installs stator core wheel hub and stator core on the main shaft, stator core installs in the tip of wheel hub towards the shell unshakable in one's determination, the shell is equipped with a plurality of permanent magnets towards stator core subsides. The motor is simple in structure, easy to maintain in subsequent structures, low in cost and wide in application range. In addition, the structure form is easy to realize the ultrathin structure of the motor, and is beneficial to heat dissipation and large-inertia load driving operation in the subsequent working process. And the structure adopts a middle-shaped supporting structure, so that the structural strength of the motor is enhanced, and the improvement of the operation stability and the enhancement of the axial bearing capacity are realized.

Description

Multipurpose three-phase AC permanent magnet outer rotor low-speed synchronous motor

Technical Field

The utility model relates to a multipurpose three-phase exchanges permanent magnetism external rotor low-speed synchronous machine of low-speed motor application.

Background

In various industries, a low-speed or even very low-speed motor is needed, and the use requirement is met by reducing the speed through an acceleration and deceleration gear of a common three-phase asynchronous motor. However, the equipment adopting the arrangement mode is heavy, maintenance and lubrication grease replacement are required to be carried out regularly, and meanwhile, the problems of gear box running, overflowing, dripping, leakage and the like exist in the use of the equipment, so that the environment for use is polluted and damaged, and even great economic loss is caused to a user of the equipment. The setting method also makes requirements on the application range of the device, and brings inconvenience to equipment users.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a multipurpose three-phase exchanges permanent magnetism external rotor low-speed synchronous machine that effective realization structure is simplified.

The utility model provides a technical scheme that its technical problem adopted is:

the multipurpose three-phase alternating-current permanent-magnet outer rotor low-speed synchronous motor comprises a shell, a motor rotor, a motor stator and a main shaft, wherein the shell comprises an upper end cover, an annular outer ring and a lower end cover, the upper end cover and the lower end cover are respectively connected with two ends of the annular outer ring, the upper end cover, the annular outer ring and the lower end cover are enclosed to form a motor stator accommodating cavity for accommodating the motor stator, the main shaft penetrates through the shell along the central axis of the shell and is connected with the upper end cover and the lower end cover through a bearing, one end of the main shaft extending out of the upper end cover is used for realizing hanging and fixing operation, the shell can realize relative rotation operation with the main shaft along the axis, the shell is used for connecting an external load, the motor stator comprises a stator core hub and a stator core, the stator core hub is sleeved on the main shaft, and two end faces of the stator core, the stator core is arranged at the end part of the stator core wheel hub facing the annular outer ring, and the annular outer ring is provided with a plurality of permanent magnets facing the stator core in an adhering manner so as to form a motor rotor.

The motor realizes the connection of the stator core and the main shaft through the stator core hub, further realizes the connection with the upper end cover and the lower end cover through the upper shaft sleeve and the lower shaft sleeve, and simultaneously pastes the permanent magnet on the inner surface of the annular outer ring to form a motor rotor, thereby effectively simplifying the structure of the low-speed synchronous motor, reducing the cost, easily forming an ultrathin structural form, and being beneficial to the heat dissipation and large-inertia load driving operation in the subsequent working process. In addition, this motor structure forms "well" style of calligraphy bearing structure, has strengthened motor self structural strength, and makes operating stability, axial bearing capacity reinforcing.

Furthermore, the stator core is externally coated with slot insulation and upper and lower end plates, and the windings are tightly wound on the stator in a layered manner through the slot insulation and the upper and lower end plates.

Furthermore, the stator core comprises a plurality of slot magnetic poles, and the winding adopts a multi-magnetic pole fractional slot double-layer winding with the number close to the number of the slot magnetic poles.

Further, the upper end cover is provided with a mounting boss, and the mounting boss is used for realizing connection of an external load.

Furthermore, the installation boss is of a circular ring structure arranged along the central axis of the shell, and the installation boss and the upper end cover are of an integrated structure.

The utility model has the advantages that:

1. the motor is simple in structure, easy for subsequent structural maintenance work, low in cost, wide in application range, easy to realize an ultrathin structural form, beneficial to heat dissipation and large-inertia load driving operation in the working process, and capable of enhancing the structural strength of the motor and improving the operation stability and the axial bearing capacity by adopting a middle-shaped supporting structure;

2. the layered close-wound winding form improves the winding coefficient, increases the winding utilization rate, greatly reduces the axial size of the motor, saves copper materials, greatly enhances the contact area with air, is beneficial to the dissipation of heat, and simultaneously improves the winding coefficient, reduces the cogging torque and reduces the running noise due to the arrangement of the multi-magnetic pole fractional-slot double-layer winding close to the slot magnetic pole number of the winding;

3. the design is a position-sensing-free form, a position sensor or a rotary transformer and the like are omitted, and the motor is simpler and more reliable to operate.

Drawings

Fig. 1 is a schematic structural diagram of a multipurpose three-phase ac permanent magnet outer rotor low-speed synchronous motor of the present invention;

FIG. 2 is an enlarged view of the structure of area A of FIG. 1;

labeled as: the stator comprises an upper end cover 1, a mounting boss 11, an annular outer ring 2, a permanent magnet 21, a lower end cover 3, an upper bearing 4, an upper bearing sleeve 41, a lower bearing 5, a lower bearing sleeve 51, a main shaft 6, a stator core 7, a stator core hub 71, slot insulation, an upper end plate 72, a lower end plate 72 and a winding 8.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

The structure of the multipurpose three-phase alternating-current permanent-magnet outer rotor low-speed synchronous motor is shown in fig. 1, and a motor stator core 7 of the motor stator is assembled on a main shaft 8 through a stator core hub 71. To ensure structural strength, the material of the stator core hub 71 may be selected from aluminum metal. This stator core wheel hub 7 carries out coaxial cover along the axis of main shaft 8 and establishes the installation operation, and stator core 7 installs on stator core wheel hub 7's the terminal surface outwards this moment, and then forms "well" font bearing structure. Meanwhile, as shown in fig. 2, the winding 8 is tightly and densely wound on the stator core 7 in a layered manner through slot insulation and the upper and lower end plates 72, so that the winding coefficient is improved, and the winding utilization rate is increased. In addition, the motor axial dimension is greatly reduced in the layering close winding, the copper material is saved, the contact area with the air is increased, and the heat dissipation is facilitated. Meanwhile, a multi-magnetic pole fractional slot double-layer winding with the number of the magnetic poles close to the slot can be adopted to realize the characteristics of high winding coefficient, small cogging torque, low noise and the like. And the motor rotor is formed by circumferentially sticking permanent magnets 21 to the annular outer ring 2. This shell is surrounded by upper end cover 1, annular outer lane 2 and lower end cover 3 and forms, and annular outer lane 2 is cylindrical annular structure, then upper end cover 1 and lower end cover 2 be with the circular cross-section assorted circular sheetmetal at annular outer lane 2's both ends. This upper end cover 1 and lower end cover 2 utilize a plurality of connecting bolt to realize that the periphery connects respectively in the both ends of annular outer lane 2, and then shelter from to surround to form motor stator to hold the cavity to two tip of annular outer lane 2, and bolted connection position should carry out the even setting of circumference this moment to guarantee structural connection stability. And the main shaft 6 connected with the stator core hub 71 and the stator core 7 is arranged coaxially with the shell 2, the stator core hub 71 and the stator core 7 are positioned in a motor stator accommodating chamber, and the stator core 7 faces and is close to the permanent magnet 21 arranged on the inner surface of the annular outer ring 2. The upper end cap 1 and the lower end cap 3 are assembled with the main shaft 6 through the upper bearing 4, the upper bearing housing 41, the lower bearing 5 and the lower bearing housing 51, respectively. Due to the layered close winding technology of the winding 8, the axial length of the stator core 7 is shortened, the distance requirement between the upper end cover 3 and the lower end cover 13 which are connected through the annular outer ring 2 is reduced, at the moment, the upper bearing 4 and the lower bearing 5 which are sleeved and connected on the main shaft 8 can approach the center of the stator core 7 as far as possible, namely, the stator core hub 72, the axial length of the motor is greatly reduced, the cost is reduced, and the heat dissipation operation of the motor is facilitated. At the moment, the motor forms an integral middle-shaped supporting structure, the structural strength of the motor is improved, the further improvement of the operation stability is realized, and the axial bearing capacity is enhanced. In addition, the connection mode of the structure can be that the upper end cover 1 is connected to the main shaft 6 through the upper bearing 4 and the upper bearing sleeve 41, then the annular outer ring 2 adhered with the permanent magnet 21 is connected to one side of the upper end cover 1, then the stator core hub 71 and the stator core 7 are sequentially sleeved and installed in the area of the main shaft 6 formed by the upper end cover 1 and the annular outer ring 2 in a surrounding mode, then the lower end cover 3 is connected to the main shaft 6 through the lower bearing 5 and the lower bearing sleeve 51, and finally the lower end cover 3 is connected with the annular outer ring 2 through bolts. Due to the structural arrangement of the shell, the diversity of structural disassembly and installation processes is improved, the requirements of various operation methods are easily met, and the installation configuration operation of the device is facilitated.

After the motor structure is connected, one end of the main shaft 8 extending out of the upper end cover 1 can be suspended and fixed, so that the vertical working effect of the motor is guaranteed, and an external load is connected to the mounting boss 11 of the upper end cover 1. The mounting boss 11 is a circular ring structure arranged along the central axis of the housing, and the main shaft 8 is sleeved with the structure, so that the load operation balance effect is ensured. To ensure structural strength, the mounting boss 11 is cast integrally with the upper end cap 1. At this time, the weight of the entire motor and the physical weight of the load body are all borne by the upper bearing 4, the lower bearing 5, and the main shaft 6. And the motor structure has no position sensing form, so that a position sensor or a rotary transformer and the like are omitted, and the motor is simpler and more reliable to operate.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. The multipurpose three-phase alternating-current permanent-magnet outer rotor low-speed synchronous motor comprises a shell, a motor rotor, a motor stator provided with a plurality of windings (8) and a main shaft (6), and is characterized in that the shell comprises an upper end cover (1), an annular outer ring (2) and a lower end cover (3), the upper end cover (1) and the lower end cover (3) are respectively connected with two ends of the annular outer ring (2), the upper end cover (1), the annular outer ring (2) and the lower end cover (3) surround to form a motor stator accommodating chamber for placing the motor stator, the main shaft (6) penetrates through the shell along the central axis of the shell and is connected with the upper end cover (1) and the lower end cover (3) through bearings, one end of the main shaft (6) extending out of the upper end cover (1) is used for realizing hanging and fixing operation, and the shell can realize relative rotation operation with the main shaft (6) along the, the shell is used for connecting external load, motor stator includes stator core wheel hub (71) and stator core (7), stator core wheel hub (71) cover is established and is installed on main shaft (6), two terminal surfaces orientation of stator core wheel hub (71) are close to upper end cover (1) and lower end cover (3), thereby stator core (7) are installed in stator core wheel hub (71) towards the tip of annular outer lane (2), thereby annular outer lane (2) are equipped with a plurality of permanent magnets (21) towards stator core (7) subsides and constitute electric motor rotor.

2. The multipurpose three-phase AC permanent magnet outer rotor low speed synchronous machine according to claim 1, wherein the stator core (7) is coated with slot insulation and upper and lower end plates (72), and the windings (8) are layered and tightly wound on the stator core (7) through the slot insulation and the upper and lower end plates (72).

3. The multipurpose three-phase alternating current permanent magnet outer rotor low speed synchronous machine according to claim 2, wherein the stator core (7) comprises a plurality of slot pole numbers, and the winding (8) adopts a multi-pole fractional slot double layer winding with a near slot pole number.

4. The multipurpose three-phase alternating current permanent magnet outer rotor low speed synchronous machine according to claim 1, wherein the upper end cover (1) is provided with a mounting boss (11), and the mounting boss (11) is used for realizing connection of external loads.

5. The multipurpose three-phase alternating-current permanent-magnet outer rotor low-speed synchronous motor according to claim 4, wherein the mounting boss (11) is of a circular ring structure arranged along the central axis of the housing, and the mounting boss (11) and the upper end cover (1) are of an integrated structure.

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