CN215300303U - Tangential rotor and permanent magnet motor - Google Patents

Abstract

The utility model discloses a tangential rotor and permanent-magnet machine belongs to motor technical field, the tangential rotor includes the pivot and is located epaxial rotor core, rotor core includes a plurality of independent fan-shaped iron core pieces of arranging along the circumferencial direction, is equipped with the permanent magnet groove between the adjacent fan-shaped iron core piece, the permanent magnet inslot is equipped with the permanent magnet. The utility model discloses utilize the air to separate every fan-shaped iron core piece each other on the circumferencial direction, can reduce the magnetic leakage, improved the utilization ratio of permanent magnet, reduce cost.

Description

Tangential rotor and permanent magnet motor

Technical Field

The utility model relates to the technical field of electric machine, especially indicate a tangential rotor and permanent-magnet machine.

Background

Because the tangential (type) permanent magnet motor has the effect of 'magnetic concentration', compared with the radial (type) permanent magnet motor, the tangential (type) permanent magnet motor can generate higher air gap magnetic density, so that the motor has the advantages of small volume, light weight, large torque, high power density, high motor efficiency, good dynamic performance and the like, and is increasingly applied to the industrial fields of servo systems, electric traction and the like and the household appliance industry. The tangential permanent magnet motor in the prior art has the following disadvantages: the magnetic leakage is more, and the utilization rate of the permanent magnet is low.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a tangential rotor and permanent-magnet machine who reduces the magnetic leakage, improves permanent magnet utilization ratio.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

on the one hand, the tangential rotor comprises a rotating shaft and a rotor core positioned on the rotating shaft, wherein the rotor core comprises a plurality of independent fan-shaped core blocks arranged along the circumferential direction, a permanent magnet groove is formed between every two adjacent fan-shaped core blocks, and a permanent magnet is arranged in the permanent magnet groove.

Furthermore, the fan-shaped iron core block is formed by overlapping a plurality of fan-shaped iron core pieces.

Furthermore, the fan-shaped iron core plate is formed by stamping silicon steel sheets.

Further, the width of one side, close to the rotating shaft, between adjacent fan-shaped iron core blocks is more than or equal to 1.7 mm;

and/or the width of one side between the adjacent fan-shaped iron core blocks far away from the rotating shaft is more than or equal to 1.2 mm;

and/or the width of the permanent magnet slot is more than or equal to 3 mm.

Furthermore, a spacer bush is arranged between the rotating shaft and the rotor core, and the opposite surface of the rotor core and the rotating shaft is arc-shaped and matched with the outer surface of the spacer bush.

Furthermore, the spacer bush is made of a non-magnetic material.

In another aspect, a tangential permanent magnet machine is provided, comprising the tangential rotor described above.

Furthermore, the tangential permanent magnet motor further comprises a pair of end covers arranged on two axial sides of the rotor core, a first through hole is formed in the fan-shaped core block, a second through hole matched with the first through hole is formed in the end covers, and fixing bolts penetrate through the first through hole and the second through hole.

Further, the number of the first through holes is two, one of the first through holes is positioned at the bottom of the fan-shaped core block, and the other one of the first through holes is positioned at the middle of the fan-shaped core block;

and/or an end cover barrier piece is arranged on one side of the rotor core on the rotating shaft, and an end cover locking nut is arranged on the other side of the rotor core.

Furthermore, the end cover is provided with a plurality of radial strip holes.

The utility model discloses following beneficial effect has:

the tangential rotor and the permanent magnet motor of the utility model have the advantages that the rotor core comprises a plurality of independent fan-shaped iron core blocks arranged along the circumferential direction (namely, the adjacent fan-shaped iron core blocks are not contacted and are separated from each other through air), a permanent magnet groove is arranged between the adjacent fan-shaped iron core blocks, and a permanent magnet is arranged in the permanent magnet groove; the inventor discovers that the relative permeability of air is 1 in the research process, and the relative permeability of iron core piece is 7000 ~ 10000, is 7000 ~ 10000 times of air, the utility model discloses utilize the air to separate every fan-shaped iron core piece each other on the circumferencial direction, can reduce the magnetic leakage, improved the utilization ratio of permanent magnet, reduce cost.

Drawings

FIG. 1 is a schematic view of the tangential rotor of the present invention in one direction;

FIG. 2 is a schematic view of the tangential rotor of the present invention in another direction;

FIG. 3 is a cross-sectional view of the tangential rotor of the present invention;

FIG. 4 is a schematic structural view of a single fan-shaped core block in the tangential rotor of the present invention;

fig. 5 is a strain cloud diagram of the tangential rotor of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

On the one hand, the utility model provides a tangential rotor, as shown in fig. 1-5, including pivot 1 with be located pivot 1 epaxial rotor core 2, rotor core 2 includes a plurality of independent fan-shaped iron core pieces 21 that arrange along the circumferencial direction, is equipped with permanent magnet groove 22 between the adjacent fan-shaped iron core piece 21, is equipped with permanent magnet 3 in the permanent magnet groove 22.

The tangential rotor of the utility model, the rotor core comprises a plurality of independent fan-shaped iron core blocks arranged along the circumferential direction (i.e. the adjacent fan-shaped iron core blocks are not contacted and are separated from each other by air), a permanent magnet groove is arranged between the adjacent fan-shaped iron core blocks, and a permanent magnet is arranged in the permanent magnet groove; the inventor discovers that the relative permeability of air is 1 in the research process, and the relative permeability of iron core piece is 7000 ~ 10000, is 7000 ~ 10000 times of air, the utility model discloses utilize the air to separate every fan-shaped iron core piece each other on the circumferencial direction, can reduce the magnetic leakage, improved the utilization ratio of permanent magnet, reduce cost.

The fan-shaped iron core block 21 can adopt an integral structure and also can adopt a split structure, the utility model discloses a split structure, fan-shaped iron core block 21 is preferred to be formed by the stack of a plurality of fan-shaped iron core blocks (constitute through multilayer stack on the axial). Further, the fan-shaped iron core plate is preferably stamped from a silicon steel sheet.

As shown in fig. 3, the width d1 between the adjacent segment-shaped iron core blocks 21 on the side close to the rotating shaft 1 is preferably greater than or equal to 1.7 mm; the width d2 of the side between the adjacent fan-shaped iron core blocks 21 far away from the rotating shaft 1 is preferably more than or equal to 1.2 mm; the width d3 of the permanent magnet slot 22 is preferably equal to or greater than 3 mm.

Can be equipped with spacer 5 between pivot 1 and rotor core 2, rotor core 2 and the 1 opposite face of pivot be with 5 surface matched with arc of spacer, also the external diameter of spacer 5 forms closely to cooperate with rotor core 2's internal diameter R promptly, can strengthen rotor core 2 with the cooperation of pivot 1's concentricity. At this time, the spacer 5 may pre-position the rotor core 2 in the radial direction. The material of the spacer 5 is preferably a non-magnetic material or a weakly magnetic material, such as copper, aluminum alloy, or stainless steel, which can isolate the magnetic field.

On the other hand, the utility model provides a tangential permanent-magnet machine, including foretell tangential rotor. Since the tangential rotor structure is the same as above, it is not described herein again.

The tangential permanent magnet motor of the utility model has the advantages that the rotor core comprises a plurality of independent fan-shaped iron core blocks arranged along the circumferential direction (namely, the adjacent fan-shaped iron core blocks are not contacted and are separated from each other by air), a permanent magnet groove is arranged between the adjacent fan-shaped iron core blocks, and a permanent magnet is arranged in the permanent magnet groove; the inventor discovers that the relative permeability of air is 1 in the research process, and the relative permeability of iron core piece is 7000 ~ 10000, is 7000 ~ 10000 times of air, the utility model discloses utilize the air to separate every fan-shaped iron core piece each other on the circumferencial direction, can reduce the magnetic leakage, improved the utilization ratio of permanent magnet, reduce cost.

For fixing the rotor core 2, various structural forms can be adopted, which can be easily conceived by those skilled in the art, and the present invention preferably adopts the following structural forms:

as shown in fig. 1-2, the tangential permanent magnet motor further includes a pair of end covers 4 covering both sides of the rotor core 2 in the axial direction, the fan-shaped core blocks 21 are provided with first through holes 211, the end covers 4 are provided with second through holes matching with the first through holes 211, fixing bolts 41 penetrate through the first through holes 211 and the second through holes, so that the fan-shaped core blocks 21 in the circumferential direction can be assembled into an integral tangential rotor through the fixing bolts 41, the positioning effect is good, the assembly is easy, the mechanical strength and the structural strength of the tangential rotor can be improved (as shown in fig. 5), and the use condition of the tangential rotor is met. An end cover blocking piece 11 can be arranged on one side of the rotor core 21 on the rotating shaft 1, and an end cover locking nut 12 is arranged on the other side of the rotating shaft, so that the overall firmness can be improved. The material of the end cap 4 is preferably a non-magnetic material or a weakly magnetic material, such as copper, aluminum alloy, or stainless steel, which can isolate the magnetic field.

For better fixing and positioning the fan-shaped core blocks 21 in the circumferential direction, as shown in fig. 3, the number of the first through holes 211 is preferably two, one of which is located at the bottom of the fan-shaped core blocks 21 and the other of which is located at the middle of the fan-shaped core blocks 21, and the number of the second through holes is also two and corresponds to the position of the first through holes 211. The end cap 4 may be provided with a plurality of radial elongated holes 42 for heat dissipation.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The tangential rotor comprises a rotating shaft and a rotor core positioned on the rotating shaft, and is characterized in that the rotor core comprises a plurality of independent fan-shaped core blocks arranged along the circumferential direction, a permanent magnet groove is formed between every two adjacent fan-shaped core blocks, and a permanent magnet is arranged in each permanent magnet groove.

2. The tangential rotor of claim 1, wherein said sector-shaped core blocks are formed by stacking a plurality of sector-shaped core pieces.

3. The tangential rotor of claim 2, wherein said fan-shaped iron core sheets are stamped from silicon steel sheets.

4. The tangential rotor of claim 1, wherein the width between the adjacent segmental iron core blocks close to the side of the rotating shaft is more than or equal to 1.7 mm;

and/or the width of one side between the adjacent fan-shaped iron core blocks far away from the rotating shaft is more than or equal to 1.2 mm;

and/or the width of the permanent magnet slot is more than or equal to 3 mm.

5. The tangential rotor of any of claims 1-4, wherein a spacer is provided between the rotor shaft and the rotor core, and the opposite surface of the rotor core to the rotor shaft is arc-shaped and fits with the outer surface of the spacer.

6. The tangential rotor of claim 5, wherein the material of said spacer is a non-magnetically conductive material.

7. A tangential permanent magnet machine comprising a tangential rotor according to any of claims 1-6.

8. The tangential permanent magnet motor according to claim 7, further comprising a pair of end covers covering both sides of the rotor core in the axial direction, wherein the fan-shaped core block is provided with a first through hole, the end covers are provided with a second through hole matching with the first through hole, and the first through hole and the second through hole are internally provided with fixing bolts.

9. The tangential permanent magnet motor according to claim 8, wherein the number of the first through holes is two, one of which is located at the bottom of the segment-shaped core block and the other of which is located at the middle of the segment-shaped core block;

and/or an end cover barrier piece is arranged on one side of the rotor core on the rotating shaft, and an end cover locking nut is arranged on the other side of the rotor core.

10. The tangential permanent magnet machine of claim 8, wherein the end caps are provided with a plurality of radial slots.

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