CN214850918U

CN214850918U - Disc type permanent magnet motor

Info

Publication number: CN214850918U
Application number: CN202120932170.9U
Authority: CN
Inventors: 肖锐
Original assignee: Zhongshan Broad Ocean Motor Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-23
Anticipated expiration: 2031-04-30
Also published as: WO2022227358A1

Abstract

The utility model discloses a disc permanent magnet motor, including stator module and rotor subassembly, stator module and rotor subassembly are overall arrangement from top to bottom forms the axial magnetic coupling, and the stator module includes stator core, and stator core includes yoke portion and a plurality of tooth portion, forms a rule groove between two adjacent tooth portions, and the rule groove is provided with n, and stator core's external diameter is D; the rotor assembly comprises a rotor disc, a plurality of rotor cores and a plurality of permanent magnets, the rotor cores are arranged on the rotor disc, one permanent magnet is embedded between every two adjacent rotor cores, the width H of a notch of the wire embedding groove is more than or equal to sin (360 degrees/2 n) × D, the stator cores adopt an open groove structure, and the width of the notch is correspondingly designed according to the size of the stator cores, so that the using amount of stator silicon steel can be reduced, and the manufacturing cost is reduced; an included angle alpha is formed between the permanent magnet and the radial line of the rotor assembly, namely the rotor assembly adopts a chute design, so that the torque pulsation of the permanent magnet disc type motor can be reduced, the working efficiency of the motor is improved, and the noise of the motor is reduced.

Description

Disc type permanent magnet motor

The technical field is as follows:

the utility model relates to a disk permanent-magnet machine.

Background art:

the axial magnetic field disc type permanent magnet synchronous motor in the prior art is increasingly applied due to high power density, light weight and small volume, for example, the axial magnetic field disc type permanent magnet synchronous motor is applied to a traction motor of a new energy automobile. In this kind of current motor structure, rotor magnet steel arranges that most adopt surface-mounted formula magnet steel structure axial magnetic field, and a small part adopts SPOKE to gather magnetic pole structure, but current disk motor has following problem: 1. the stator punching sheet of the disc type motor generally adopts a closed slot, and the silicon steel utilization rate of the disc type motor with the structure is low, so that the overall material cost of the motor is high; 2. in practical use of the SPOKE rotor structure, the torque pulse of a disc type motor adopting the rotor structure is higher due to high air gap magnetic density of a magnetic concentration effect; 3. the motor rotor iron core adopting the common SPOKE structure is easy to fall off and the air gap is difficult to guarantee when the motor rotor iron core is vertically laminated and installed.

The invention content is as follows:

the utility model aims at providing a disk permanent-magnet machine solves among the prior art stator towards the piece and generally adopts the closed slot, and the wide design of groove is unreasonable, and the disk motor silicon steel utilization ratio of this structure is low, leads to the high technical problem of motor overall material cost.

A further object of the utility model is to provide a disk permanent-magnet machine adopts SPOKE type rotor structure in the in-service use among the solution prior art, owing to gather magnetic effect air gap magnetic density high, leads to the technical problem that torque ripple is on the high side.

The third purpose of the utility model is to provide a disk permanent-magnet machine adopts SPOKE type rotor structure among the solution prior art, and when rotor core adopted radially to fold to press, the technical problem that drops easily and the air gap is difficult to the assurance towards the piece.

The purpose of the utility model is realized by the following technical scheme:

the utility model aims at providing a disk permanent-magnet machine, including stator module and rotor subassembly, stator module and rotor subassembly upper and lower overall arrangement form the axial magnetic coupling, and stator module includes stator core, end insulation and coil winding, and stator core includes yoke portion and from the protruding a plurality of tooth portion of yoke portion axial, forms a rule groove between two adjacent tooth portions, and the rule groove is provided with n, and stator core's external diameter is D, and the coil winding is coiled after tooth portion installation end insulation; the rotor subassembly includes rotor dish, a plurality of rotor core and a plurality of permanent magnet, and a plurality of rotor core are installed on the rotor dish according to the circumference interval, inlays between two adjacent rotor core and adorns a permanent magnet, its characterized in that: the form that the rule groove adopted the open slot, and the width of rule groove is unanimous with the notch width H of rule groove promptly, and the notch width of rule groove satisfies: h is more than or equal to sin (360 degrees/2 n) D.

Preferably, the permanent magnets form an angle α with a radial line of the rotor assembly.

Preferably, the included angle α ranges from 2.5 ° to 7.5 °.

Preferably, the angle α is 5 °.

Preferably, the permanent magnet has an axial cross-sectional shape of a rectangle or a trapezoid.

Preferably, the stator assembly is installed in a stator disc, a bearing seat is convexly arranged in the middle of a bottom plate of the stator disc, the bearing is embedded in the bearing seat, a yoke part of the stator core is surrounded to form a central hole, the bearing seat penetrates through the central hole, a rotating shaft is convexly arranged in the middle of the bottom end face of the rotor disc, and the rotating shaft is inserted in the bearing, so that the rotor assembly and the stator assembly form an integral motor.

Preferably, when the axial cross-sectional shape of the permanent magnet is trapezoidal, the axial cross-sectional shape of the rotor core is square, and the rotor core is formed by horizontally stacking a plurality of rotor sheets.

Preferably, the stator disc comprises a bottom plate and a bearing seat arranged in the middle of the bottom plate of the stator disc in a protruding mode, the bearing seat is provided with a through hole, a plurality of first mounting holes distributed at intervals in the circumferential direction are formed in the bottom plate on the periphery of the bearing seat, and the stator assembly and the stator disc are connected in an installing mode through a first screw penetrating through the first mounting holes and screwed on the stator core.

Preferably, the raised peripheral annular baffle plate is arranged at the peripheral edge of the bottom plate, the bearing seat and the peripheral annular baffle plate define an annular accommodating cavity, and the stator assembly is embedded into the annular accommodating cavity.

Preferably, a plurality of second mounting holes are formed in the rotor disc on the periphery of the rotating shaft, and the rotor disc, the plurality of rotor cores and the plurality of permanent magnets are locked into a whole by screwing second screws on the rotor cores through the second mounting holes.

Preferably, a plurality of load mounting screw holes are also arranged on the top surface of the rotor disk in a circumferential arrangement.

Preferably, the shaft is hollow.

Preferably, the plurality of permanent magnets are made of ferrite materials to reduce the cost of the motor.

Compared with the prior art, the utility model, following effect has:

1) the utility model discloses a disk permanent magnet motor, including stator module and rotor subassembly, stator module and rotor subassembly upper and lower overall arrangement form the axial magnetic coupling, and stator module includes stator core, end insulation and coil winding, and stator core includes yoke portion and from a plurality of tooth portions of yoke portion axial bulge, forms a rule groove between two adjacent tooth portions, and the rule groove is provided with n, and stator core's external diameter is D, and winding coil winding after tooth portion installation end insulation; the rotor subassembly includes rotor dish, a plurality of rotor core and a plurality of permanent magnet, and a plurality of rotor core are installed on the rotor dish according to the circumference interval, inlays between two adjacent rotor core and adorns a permanent magnet, its characterized in that: the form that the rule groove adopted the open slot, and the width of rule groove is unanimous with the notch width H of rule groove promptly, and the notch width of rule groove satisfies: h is more than or equal to sin (360 degrees/2 n) D; stator core adopts the open slot structure promptly, and carries out corresponding design according to stator core's size to its notch width, can reduce stator silicon steel quantity by a wide margin to reduce manufacturing cost.

2) Other advantages of the present invention will be described in detail in the examples section.

Description of the drawings:

fig. 1 is a schematic perspective view of a disc-type permanent magnet motor according to an embodiment of the present invention;

fig. 2 is an exploded schematic structural diagram of a disc-type permanent magnet motor according to an embodiment of the present invention;

fig. 3 is a schematic front view of a disc-type permanent magnet motor according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view A-A provided in FIG. 3;

fig. 5 is a schematic perspective view of a stator core according to an embodiment of the present invention;

fig. 6 is a top view of a stator core according to an embodiment of the present invention;

fig. 7 is a schematic partial structural view of a slot of a stator core according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a permanent magnet and a rotor core according to an embodiment of the present invention;

fig. 9 is a perspective view of a rotor assembly provided in accordance with an embodiment of the present invention;

fig. 10 is a top view of a rotor assembly provided in accordance with an embodiment of the present invention;

FIG. 11 is a cross-sectional view B-B of FIG. 10;

fig. 12 is a schematic perspective view of a permanent magnet and a rotor core according to a second embodiment of the present invention;

fig. 13 is a schematic perspective view of a rotor core according to a second embodiment of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the following detailed description of preferred embodiments and accompanying drawings.

As shown in fig. 1 to 11, the present embodiment provides a disc-type permanent magnet motor, including a stator assembly 10 and a rotor assembly 20, where the stator assembly 10 and the rotor assembly 20 are arranged up and down to form an axial magnetic coupling, the stator assembly 10 includes a stator core 1, an end insulator 2 and a coil winding 3, the stator core 1 includes a yoke portion 11 and a plurality of tooth portions 12 axially protruding from the yoke portion 11, a slot insert 4 is formed between two adjacent tooth portions 12, n slot inserts 4 are provided, the outer diameter of the stator core 1 is D, and the tooth portions 12 are wound around the coil winding 3 after being installed with the end insulator 2; rotor subassembly 20 includes rotor disc 5, a plurality of rotor core 6 and a plurality of permanent magnet 7, and a plurality of rotor core 6 are installed on rotor disc 5 according to circumferential interval, inlays between two adjacent rotor core 6 and adorns a permanent magnet 7, its characterized in that: the rule groove 4 adopts the form of open slot, and the width of rule groove 4 is unanimous with the notch 41 width H of rule groove 4 promptly, and the notch 41 width of rule groove 4 satisfies: h is more than or equal to sin (360 degrees/2 n) D. Stator core 1 adopts the open slot structure, and the notch 41 width carries out corresponding design according to stator core 1's size, can reduce stator silicon steel quantity by a wide margin to reduce manufacturing cost.

Preferably, an included angle α is formed between the center line L of the permanent magnet 7 and a radial line L1 of the rotor assembly 20, the radial line L1 is a center point E starting from the center O of the rotor assembly 20 and passing through the tail end of the permanent magnet 7, the radial line L1 is equivalent to a lead line OE, that is, the rotor assembly 20 adopts a chute design, and the permanent magnet 7 is inclined to the radial line L1, so that the torque ripple of the permanent magnet disc type motor can be greatly reduced, the working efficiency of the motor is improved, the noise of the motor can be reduced, and the stability of the motor is improved; through the scheme, the size and the cost of the motor can be further reduced under the condition that the performance of the motor is equivalent.

Preferably, the included angle alpha ranges from 2.5 degrees to 7.5 degrees; in particular, the angle α is preferably 5 °, which is set to be reasonable, so that the distribution of the permanent magnets 7 is reasonable.

Preferably, the permanent magnet 7 has an axial sectional shape of a rectangle or a trapezoid.

Preferably, the stator assembly 10 is installed in one stator disc 9, the bearing seat 91 is convexly arranged in the middle of the bottom plate 90 of the stator disc 9, the bearing 8 is embedded in the bearing seat 91, the yoke portion 11 of the stator core 1 surrounds the central hole 110, the bearing seat 91 penetrates through the central hole 110, the rotating shaft 51 is convexly arranged in the middle of the bottom end face of the rotor disc 5, and the rotating shaft 51 is inserted in the bearing 8, so that the rotor assembly 20 and the stator assembly 10 form an integral motor, and the structure is simple and reasonable, and the installation is convenient. The bearing 8 adopts a single bearing design, so that the cost is further reduced, and the structure is simplified.

Preferably, the stator plate 9 includes a bottom plate 90 and a bearing seat 91 protruding from the middle of the bottom plate 90 of the stator plate 9, the bearing seat 91 has a through hole 92, the bottom plate 90 on the periphery of the bearing seat 91 has a plurality of first mounting holes 93 arranged circumferentially at intervals, and the first screws 94 pass through the first mounting holes 93 and are screwed on the stator core 1, so that the stator assembly 10 and the stator plate 9 are mounted and connected together.

Preferably, the peripheral annular baffle 95 protruding at the peripheral edge of the bottom plate 90, the bearing seat 91 and the peripheral annular baffle 95 enclose an annular accommodating cavity 96, and the stator assembly 10 is embedded into the annular accommodating cavity 96, so that the structural design is reasonable, and the stator assembly 10 is effectively protected.

Preferably, a plurality of second mounting holes 53 are formed in the rotor disc 5 on the periphery of the rotating shaft 51, and the rotor disc 5, the plurality of rotor cores 6 and the plurality of permanent magnets 7 are locked into a whole by screwing second screws 54 through the second mounting holes 53 and onto the rotor cores 6.

Preferably, a plurality of load mounting screw holes 52 are also provided on the top surface of the rotor disk 5 in a circumferential arrangement so that the rotor disk 5 can be easily connected to an external load.

Preferably, the shaft 51 is hollow, which reduces weight, saves material, reduces cost, accelerates air flow, and facilitates heat dissipation.

Preferably, the permanent magnets 7 are made of ferrite material to reduce the cost of the motor.

Preferably, in the present embodiment, the axial sectional shape of the permanent magnet 7 is a rectangular parallelepiped, the axial sectional shape of the rotor core 6 is a sector, and each rotor core 6 includes a plurality of rotor laminations stacked in the axial direction of the rotor assembly 20, and the rotor laminations have a sector structure.

Example two:

in the present embodiment, a rotor core is improved on the basis of the first embodiment, as shown in fig. 12 and 13, when the axial cross-sectional shape of the permanent magnet 7 in the present embodiment is trapezoidal, the axial cross-sectional shape of the rotor core 6 is rectangular, and the rotor core 6 is formed by horizontally stacking a plurality of rotor sheets 61, so that the rotor core 6 is processed by a horizontal riveting process, so as to overcome the problem that silicon steel sheets are easy to fall off when the rotor core 6 is processed by a vertical (i.e. axial) riveting process; the shape design is reasonable, the processing is convenient, and the processing cost is low.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.

Claims

1. A disc-type permanent magnet motor comprises a stator assembly (10) and a rotor assembly (20), wherein the stator assembly (10) and the rotor assembly (20) are arranged up and down to form axial magnetic coupling, the stator assembly (10) comprises a stator core (1), end insulators (2) and coil windings (3), the stator core (1) comprises a yoke part (11) and a plurality of tooth parts (12) axially protruding from the yoke part (11), a slot (4) is formed between every two adjacent tooth parts (12), n slots (4) are arranged, the outer diameter of the stator core (1) is D, and the tooth parts (12) are provided with the end insulators (2) and then are wound on the coil windings (3); rotor subassembly (20) are including rotor dish (5), a plurality of rotor core (6) and a plurality of permanent magnet (7), and a plurality of rotor core (6) are installed on rotor dish (5) according to circumferential interval, inlays between two adjacent rotor core (6) and adorns a permanent magnet (7), its characterized in that: rule groove (4) adopt the form of open slot, and the width of rule groove (4) is unanimous with notch (41) width H of rule groove (4) promptly, and notch (41) width of rule groove (4) satisfies: h is more than or equal to sin (360 degrees/2 n) D.

2. A disc-type permanent magnet motor according to claim 1, characterized in that: the central line L of the permanent magnet (7) forms an included angle alpha with the radial line L1 of the rotor assembly (20).

3. A disc-type permanent magnet motor according to claim 2, characterized in that: the included angle alpha ranges from 2.5 degrees to 7.5 degrees.

4. A disc-type permanent magnet motor according to claim 3, characterized in that: the included angle alpha is 5 deg.

5. A disc-type permanent magnet motor according to claim 1, 2, 3 or 4, characterized in that: the axial section of the permanent magnet (7) is rectangular or trapezoidal.

6. The disc-type permanent magnet motor of claim 5, wherein: the stator assembly (10) is installed in a stator disc (9), a bearing seat (91) is arranged in the middle of a bottom plate (90) of the stator disc (9) in a protruding mode, a bearing (8) is embedded in the bearing seat (91), a yoke portion (11) of a stator iron core (1) is surrounded to form a center hole (110), the bearing seat (91) penetrates through the center hole (110), a rotating shaft (51) is arranged in the middle of the bottom end face of the rotor disc (5) in a protruding mode, and the rotating shaft (51) is inserted into the bearing (8), so that the rotor assembly (20) and the stator assembly (10) form an integral motor.

7. The disc-type permanent magnet motor of claim 6, wherein: when the axial section of the permanent magnet (7) is trapezoidal, the axial section of the rotor core (6) is square, and the rotor core (6) is formed by horizontally stacking a plurality of rotor punching sheets (61).

8. The disc-type permanent magnet motor of claim 6, wherein: stator dish (9) are provided with bearing frame (91) including bottom plate (90) and protrusion in the middle of bottom plate (90) that is located stator dish (9), and bearing frame (91) set up perforating hole (92), offer first mounting hole (93) of a plurality of circumference interval overall arrangements on bearing frame (91) outlying bottom plate (90), pass first mounting hole (93) and screw up on stator core (1) through first screw (94), make stator module (10) and stator dish (9) erection joint together.

9. The disc-type permanent magnet motor of claim 8, wherein: the outer periphery edge of bottom plate (90) is bellied peripheral annular baffle (95), and bottom plate (90), bearing frame (91) and peripheral annular baffle (95) enclose into an annular and hold chamber (96), and stator module (10) imbeds inside in annular holds chamber (96).

10. The disc-type permanent magnet motor of claim 6, wherein: a plurality of second mounting holes (53) are formed in the rotor disc (5) on the periphery of the rotating shaft (51), and second screws (54) penetrate through the second mounting holes (53) and are screwed on the rotor iron cores (6), so that the rotor disc (5), the plurality of rotor iron cores (6) and the plurality of permanent magnets (7) are locked into a whole.

11. A disc-type permanent magnet motor according to claim 10, characterized in that: the top surface of the rotor disc (5) is also provided with a plurality of load mounting screw holes (52) which are distributed according to the circumferential direction.

12. A disc-type permanent magnet motor according to claim 11, characterized in that: the shaft (51) is hollow.

13. A disc-type permanent magnet motor according to claim 12, characterized in that: the permanent magnets (7) are made of ferrite materials so as to reduce the cost of the motor.