CN210246434U - Permanent magnet component of permanent magnet motor - Google Patents
Permanent magnet component of permanent magnet motor Download PDFInfo
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- CN210246434U CN210246434U CN201921681014.9U CN201921681014U CN210246434U CN 210246434 U CN210246434 U CN 210246434U CN 201921681014 U CN201921681014 U CN 201921681014U CN 210246434 U CN210246434 U CN 210246434U
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Abstract
The permanent magnet component of the permanent magnet motor capable of increasing output torque and reducing back electromotive force at least comprises two permanent magnet layers which are positioned at different positions in the radial direction, wherein at least one permanent magnet layer close to the winding side of the motor, namely a near-winding permanent magnet layer, is provided with at least one pair of near-winding permanent magnets, and the magnetic pole center lines of two near-winding permanent magnets in each pair of near-winding permanent magnets are intersected at one side, far away from the motor winding, of the near-winding permanent magnet layer. In the patent, a near magnetic field formed by each pair of near-winding permanent magnets and a far magnetic field formed by at least one permanent magnet layer far away from the motor winding side, namely the permanent magnet in the far-winding permanent magnet layer, form a synthetic magnetic field of the permanent magnet component, the d-axis magnetic field intensity peak value of the synthetic magnetic field is smaller than the d-axis magnetic field intensity peak value of the far magnetic field, and the q-axis magnetic field intensity of the synthetic magnetic field is smaller than the q-axis magnetic field intensity of the far magnetic field, so that higher torque and/or lower back electromotive force can be obtained under the condition of the.
Description
Technical Field
This patent relates to permanent magnet electric machines, and in particular to permanent magnet components, i.e. the rotor or stator, of a permanent magnet electric machine.
Background
The permanent magnet motor has the characteristics of high efficiency, simple control, high power density and the like, and is widely applied. The distribution of permanent magnet parts with permanent magnets, such as rotor magnetic field, of the conventional permanent magnet motor is mostly designed in a sinusoidal manner so as to obtain smooth torque and reduce adverse factors such as harmonic waves. Since the magnetic fields are strongest at the positions of 90 ° and 270 ° of the sine curve, the law of the back electromotive force of the motor is also sine curve, and the back electromotive force is higher. For the motor, the high voltage and the strong magnetic field are beneficial to improving the efficiency of the motor and improving the power density of the motor, however, the high magnetic field intensity can generate high counter potential, and for the power device of the motor controller, the peak value of the counter potential is too high to damage the power device, so that the existing permanent magnet motor limits the power density of the motor. There is a need for a motor construction that can both increase the torque of the motor (and increase power density) and have a lower back emf.
The permanent magnet part with permanent magnet is the key part of the permanent magnet motor, and the design of the magnetic field of the permanent magnet part determines the torque output capacity and the counter potential of the rotor of the motor.
For example, referring to schematic diagrams of a rotor and the like shown in fig. 1, a rotor sheet 1 is arranged on a rotating shaft 9, two permanent magnet layers located at different positions in the radial direction are arranged on the rotor sheet 1, wherein a permanent magnet layer close to a motor winding 2 on a stator is a near-winding permanent magnet layer 3, the near-winding permanent magnet layer 3 is provided with a plurality of pairs of near-winding permanent magnets in the circumferential direction, and each pair of near-winding permanent magnets is provided with two near-winding permanent magnets 4 and 5 arranged in a v shape. The permanent magnet layer far away from the motor winding 2 side on the stator is a far winding permanent magnet layer 6, and each pair of far winding permanent magnets is provided with two far winding permanent magnets 7 and 8 which are arranged in a V shape. Two near winding permanent magnets 4 and 5 in the pair of near winding permanent magnets and two far winding permanent magnets 7 and 8 in the pair of far winding permanent magnets are symmetrical about the same symmetry axis. The intersection point A of the pole center line (straight line passing through two poles of the permanent magnet) 41 of the near-winding permanent magnet 4 and the pole center line 51 of the near-winding permanent magnet 5 is positioned on the symmetry axis, and the intersection point A is positioned on one side of the near-winding permanent magnet layer 3 close to the motor winding. The intersection point B of the pole center line 71 of the far-winding permanent magnet 7 and the pole center line 81 of the far-winding permanent magnet 8 is also located on the symmetry axis, and the intersection point B is also on the side of the far-winding permanent magnet layer 6 close to the motor winding.
Therefore, a near magnetic field formed by the pair of near winding permanent magnets 4 and 5 and a far magnetic field formed by the pair of far winding permanent magnets 7 and 8 are combined into a combined magnetic field of the rotor, the d-axis magnetic field intensity peak value of the combined magnetic field is larger, the q-axis magnetic field intensity is smaller, namely, the included angle of each pair of permanent magnets in the two layers of permanent magnet layers is smaller than 180 degrees, the magnetic fields are gathered to the symmetric center to form a magnetic field intensity peak, and the magnetic field intensity distribution rule curve refers to the c curve in fig. 1.
Disclosure of Invention
The patent aims to provide a permanent magnet component of a permanent magnet motor, which can increase output torque and reduce back electromotive force.
The permanent magnet component of the permanent magnet motor at least comprises two permanent magnet layers which are located at different positions in the radial direction, wherein at least one permanent magnet layer close to the motor winding side, namely the near winding permanent magnet layer, is provided with at least one pair of near winding permanent magnets, and the magnetic pole center lines of two near winding permanent magnets in each pair of near winding permanent magnets are intersected at one side, far away from the motor winding, of the near winding permanent magnet layer.
In the patent, a near magnetic field formed by each pair of near-winding permanent magnets and a far magnetic field formed by at least one permanent magnet layer far away from the motor winding side, namely the permanent magnet in the far-winding permanent magnet layer, form a synthetic magnetic field of the permanent magnet component, the d-axis magnetic field intensity peak value of the synthetic magnetic field is smaller than the d-axis magnetic field intensity peak value of the far magnetic field, and the q-axis magnetic field intensity of the synthetic magnetic field is smaller than the q-axis magnetic field intensity of the far magnetic field, so that higher torque and/or lower back electromotive force can be obtained under the condition of the.
In the permanent magnet component of the permanent magnet motor, the permanent magnet component is a rotor, and the motor winding is positioned on a stator surrounding the rotor.
In the permanent magnet component of the permanent magnet motor, the permanent magnet component is a stator, and a motor winding is positioned on a rotor.
In the permanent magnet component of the permanent magnet motor, two near-winding permanent magnets in the pair of near-winding permanent magnets are arranged in an inverted V shape, the included angle between the two near-winding permanent magnets is larger than 180 degrees, and the included angle refers to the included angle between the surfaces of the two near-winding permanent magnets, which are back to the central line of the permanent magnet component (namely the axis of the permanent magnet motor).
In the permanent magnet component of the permanent magnet motor, at least one permanent magnet layer far away from the motor winding, namely the far winding permanent magnet layer, is provided with at least one pair of permanent magnets, namely far winding permanent magnets, and the central lines of the magnetic poles of two far winding permanent magnets in the pair of far winding permanent magnets are intersected at one side of the far winding permanent magnet layer close to the motor winding. Preferably, two far winding permanent magnets in the pair of far winding permanent magnets are arranged in a v shape, the included angle between the two far winding permanent magnets is smaller than 180 degrees, and the included angle refers to the included angle between the surfaces of the two far winding permanent magnets, which face away from the central line of the permanent magnet part. Preferably, two near-winding permanent magnets in the pair of near-winding permanent magnets are arranged in an inverted V shape, the included angle between the two near-winding permanent magnets is larger than 180 degrees, and the included angle refers to the included angle between the surfaces of the two near-winding permanent magnets, which face away from the central line of the permanent magnet part; two near winding permanent magnets in the pair of near winding permanent magnets and two far winding permanent magnets in the pair of far winding permanent magnets are symmetrical about the same symmetry axis.
The beneficial effect of this patent:
this patent is different from conventional permanent-magnet machine, and the permanent-magnet part in this patent has two-layer permanent-magnet layer at least, and the permanent-magnet layer includes the far winding permanent-magnet layer who keeps away from motor winding and is close to motor winding's nearly winding permanent-magnet layer.
The central lines of the magnetic poles of two near-winding permanent magnets in each pair of near-winding permanent magnet layers intersect at one side of the near-winding permanent magnet layers, which is far away from the motor winding; the near magnetic field formed by the permanent magnets of each pair of near-winding permanent magnet layers and the far magnetic field formed by the permanent magnets in the far-winding permanent magnet layers are synthesized into a synthesized magnetic field of the permanent magnet part. Because the far winding permanent magnet layer gathers the magnetic field to the symmetric center, the patent makes the synthetic magnetic field flat through the near winding permanent magnet, reduces the peak value of the magnetic field intensity, increases the circumferential magnetic field intensity, and the design of the permanent magnet magnetic field plays the role of reducing the counter potential and/or increasing the output torque. The magnetic field intensity distribution law curve of the permanent magnet part of the patent with the smooth transition edge and the top and the bottom with smaller curvature, see e curve in fig. 2, compared with the magnetic field of the conventional permanent magnet part (see c curve in fig. 1), the magnetic field intensity peak value of the d-axis (or straight axis) is lower than that of the conventional motor, and the magnetic field intensity of the q-axis for generating torque is higher than that of the conventional motor, so that higher torque can be obtained under the same input current, and/or the back electromotive force is lower.
Drawings
Fig. 1 is a schematic view of a rotor or the like of a conventional permanent magnet motor;
fig. 2 is a schematic view of a rotor and the like of the permanent magnet motor of embodiment 1 of the present patent;
fig. 3 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 2 of the present patent;
fig. 4 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 3 of this patent;
fig. 5 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 4 of this patent;
fig. 6 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 5 of this patent;
fig. 7 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 6 of this patent;
fig. 8 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 7 of this patent;
fig. 9 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 8 of this patent;
fig. 10 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 9 of this patent;
fig. 11 is a schematic view of a rotor and the like of a permanent magnet motor of embodiment 10 of this patent;
fig. 12 is a schematic view of a rotor and the like of a permanent magnet motor according to embodiment 11 of this patent.
Detailed Description
Example 1:
referring to a schematic diagram of a rotor of a permanent magnet motor shown in fig. 2, a rotor sheet 1 is arranged on a rotating shaft 9, two permanent magnet layers located at different positions in the radial direction are arranged on the rotor sheet 1, wherein the permanent magnet layer close to the motor winding 2 side on a stator is a near-winding permanent magnet layer 3, the near-winding permanent magnet layer 3 is provided with a plurality of pairs of near-winding permanent magnets in the circumferential direction, and each pair of near-winding permanent magnets is provided with two near-winding permanent magnets 4 and 5. The permanent magnet layer far away from the motor winding 2 side on the stator is a far winding permanent magnet layer 6, and each pair of far winding permanent magnets is provided with two far winding permanent magnets 7 and 8. Two near-winding permanent magnets 4 and 5 in the pair of near-winding permanent magnets are arranged in an inverted V shape, and the included angle between the two near-winding permanent magnets is larger than 180 degrees. Two far winding permanent magnets 7 and 8 in the pair of far winding permanent magnets are arranged in a V shape, and the included angle between the two far winding permanent magnets is smaller than 180 degrees. The included angle of the two permanent magnets refers to the included angle between the surfaces of the two permanent magnets, which are back to the central line of the rotor. Two near winding permanent magnets 4 and 5 in the pair of near winding permanent magnets and two far winding permanent magnets 7 and 8 in the pair of far winding permanent magnets are symmetrical about the same symmetry axis.
The intersection point A of the pole center line (straight line passing through two poles of the permanent magnet) 41 of the near-winding permanent magnet 4 and the pole center line 51 of the near-winding permanent magnet 5 is positioned on the symmetry axis, and the intersection point A is positioned on the side of the near-winding permanent magnet layer 3 away from the motor winding. The intersection point B of the pole center line 71 of the far-winding permanent magnet 7 and the pole center line 81 of the far-winding permanent magnet 8 is also located on the symmetry axis, and is located on the side, close to the motor winding, of the far-winding permanent magnet layer 6.
In this way, the near magnetic field formed by the pair of near winding permanent magnets 4 and 5 and the far magnetic field formed by the pair of far winding permanent magnets 7 and 8 are combined into a combined magnetic field of the rotor, the d-axis magnetic field intensity peak value of the combined magnetic field is larger, the q-axis magnetic field intensity is smaller, and the magnetic field intensity distribution rule curve refers to the e curve in fig. 2, so that the permanent magnet motor with the rotor has lower back electromotive force and larger output torque.
Example 2
Referring to fig. 3, a schematic view of a rotor and the like of a permanent magnet motor is shown, which is mainly different from embodiment 1 in that: the near-winding permanent magnet layer 3 is formed by two pairs of near-winding permanent magnets which are repeatedly arranged in the circumferential direction. The first pair of near-winding permanent magnets is provided with two near-winding permanent magnets 4 and 5; the second pair of near-winding permanent magnets has two near-winding permanent magnets 42, 52. The near-winding permanent magnet 4 of the first pair of near-winding permanent magnets is in contact with the near-winding permanent magnet 42 of the second pair of near-winding permanent magnets, and the near-winding permanent magnet 5 of the first pair of near-winding permanent magnets is in contact with the near-winding permanent magnet 52 of the second pair of near-winding permanent magnets.
Example 3
Referring to fig. 4, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the near-winding permanent magnet layer 3 is formed by two pairs of near-winding permanent magnets which are repeatedly arranged in the circumferential direction. The first pair of near-winding permanent magnets is provided with two near-winding permanent magnets 4 and 5; the second pair of near-winding permanent magnets has two near-winding permanent magnets 43, 53. The near winding permanent magnet 4 in the first pair of near winding permanent magnets is not in contact with the near winding permanent magnet 43 in the second pair of near winding permanent magnets, and the near winding permanent magnet 5 in the first pair of near winding permanent magnets is not in contact with the near winding permanent magnet 53 in the second pair of near winding permanent magnets.
Example 4
Referring to fig. 5, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the far-winding permanent magnet layer 6 is formed by two pairs of far-winding permanent magnets arranged repeatedly in the circumferential direction. The first pair of far-winding permanent magnets has two far-winding permanent magnets 7 and 8; the second pair of remote-winding permanent magnets has two remote-winding permanent magnets 74, 84. The far winding permanent magnet 7 of the first pair of far winding permanent magnets is in contact with the far winding permanent magnet 74 of the second pair of far winding permanent magnets, and the far winding permanent magnet 8 of the first pair of far winding permanent magnets is in contact with the far winding permanent magnet 84 of the second pair of far winding permanent magnets.
Example 5
Referring to fig. 6, a schematic view of a rotor and the like of a permanent magnet motor is shown, which is mainly different from embodiment 1 in that: the far-winding permanent magnet layer 6 is formed by two pairs of far-winding permanent magnets arranged repeatedly in the circumferential direction. The first pair of far-winding permanent magnets has two far-winding permanent magnets 7 and 8; the second pair of remote-winding permanent magnets has two remote-winding permanent magnets 75, 85. The far winding permanent magnet 7 of the first pair of far winding permanent magnets is not in contact with the far winding permanent magnet 75 of the second pair of far winding permanent magnets, and the far winding permanent magnet 8 of the first pair of far winding permanent magnets is not in contact with the far winding permanent magnet 85 of the second pair of far winding permanent magnets.
Example 6
Referring to fig. 7, a schematic view of a rotor and the like of a permanent magnet motor is shown, which is mainly different from embodiment 1 in that: the far-winding permanent magnet layer has two layers, and the first far-winding permanent magnet layer 6 is formed by a first pair of far-winding permanent magnets which are arranged repeatedly in the circumferential direction. The second far-winding permanent magnet layer 66 is formed by a second pair of far-winding permanent magnets that are repeatedly arranged in the circumferential direction. The first pair of far-winding permanent magnets has two far-winding permanent magnets 7 and 8; the second pair of remote-winding permanent magnets has two remote-winding permanent magnets 76, 86.
Example 7
Referring to fig. 8, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the near-winding permanent magnet layer has two layers, and the first near-winding permanent magnet layer 3 is formed by repeatedly arranging a first pair of near-winding permanent magnets in the circumferential direction. The second near-winding permanent magnet layer 37 is formed by a second pair of near-winding permanent magnets that are repeatedly arranged in the circumferential direction. The first pair of near-winding permanent magnets is provided with two near-winding permanent magnets 4 and 5; the second pair of near-winding permanent magnets has two near-winding permanent magnets 47, 57.
Example 8
Referring to fig. 9, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the far-winding permanent magnet layer has two layers, the first far-winding permanent magnet layer 6 is formed by a pair of far-winding permanent magnets which are repeatedly arranged in the circumferential direction, and the pair of far-winding permanent magnets has two far-winding permanent magnets 7 and 8 which are arranged in a V shape. The second far-winding permanent magnet layer 68 is formed by a repeated arrangement of far-winding permanent magnets 78 extending in the tangential direction in the circumferential direction.
Example 9
Referring to fig. 10, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the far winding permanent magnet layer has two layers, the first far winding permanent magnet layer 6 is formed by a first pair of far winding permanent magnets which are repeatedly arranged in the circumferential direction, and the first pair of far winding permanent magnets are provided with two far winding permanent magnets 7 and 8 which are arranged in a V shape. The second far-winding permanent magnet layer 69 is formed by a second pair of far-winding permanent magnets that are repeatedly arranged in the circumferential direction. The second pair of remote-winding permanent magnets has two remote-winding permanent magnets 79, 89 extending in the tangential direction.
Example 10
Referring to fig. 11, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the far-winding permanent magnet layer 610 is formed by a pair of far-winding permanent magnets repeatedly arranged in the circumferential direction. The pair of far-winding permanent magnets includes two far-winding permanent magnets 710, 810 extending in the tangential direction.
Example 11
Referring to fig. 12, a schematic view of a rotor of a permanent magnet motor and the like is shown, which is mainly different from embodiment 1 in that: the far-winding permanent magnet layer 611 is formed by arranging a far-winding permanent magnet 711 extending in the tangential direction repeatedly in the circumferential direction.
In a word, the topological structure of the permanent magnet component with the permanent magnets at least comprises two permanent magnet layers, wherein the center line of each pair of permanent magnet magnetic poles in the near permanent magnet layer (the permanent magnet layer closer to the motor winding) is intersected at one side of the near permanent magnet layer far away from the motor winding, and the center line of the permanent magnet magnetic poles in the outer permanent magnet layer (the permanent magnet layer farther away from the motor winding) is at one side of the outer permanent magnet layer near the motor winding.
The permanent magnets in the far layer gather the magnetic field to the symmetric center, the synthetic magnetic field is flattened by adjusting the included angle value of each pair of permanent magnets in the near layer, the peak value of the magnetic field intensity is reduced, the circumferential magnetic field intensity is increased, and the design of the magnetic field of the permanent magnets plays a role in reducing the counter potential or increasing the output torque. Compared with the magnetic field of the conventional permanent magnet component, the magnetic force distribution law curve of the top and the bottom of the permanent magnet component with the smooth transition edges and the smaller curvature has the peak magnetic field intensity (d axis or straight axis) lower than that of the conventional motor, and the q axis magnetic field intensity for generating torque is higher than that of the conventional motor, so that higher torque and/or lower back electromotive force can be obtained under the same input current.
The permanent magnet layer refers to a permanent magnet group which is positioned near the same circumferential position.
The number, size, arrangement mode and the like of the permanent magnets except the near-winding permanent magnet layer do not influence the protection scope of the patent claims; the structure of the permanent magnet layer does not affect the protection scope of the claims of the patent; the shape, size, material and the like of the permanent magnet do not influence the protection scope of the patent claims; the permanent magnet part with the permanent magnet can be a rotor of the motor or a stator of the motor, and the protection scope of the patent claims is not affected; the structure, shape, arrangement and the like of the far-winding permanent magnet layer do not affect the protection scope of the patent claims.
Claims (7)
1. A permanent magnet component of a permanent magnet motor is characterized in that: the permanent magnet layer at least comprises two permanent magnet layers which are positioned at different positions in the radial direction, wherein at least one permanent magnet layer close to the motor winding side, namely the near winding permanent magnet layer, comprises at least one pair of near winding permanent magnets, and the magnetic pole center lines of two near winding permanent magnets in each pair of near winding permanent magnets are intersected at the side, far away from the motor winding, of the near winding permanent magnet layer.
2. The permanent magnet component of a permanent magnet electric machine of claim 1, wherein: the permanent magnet part is a rotor, and the motor winding is positioned on a stator surrounding the rotor.
3. The permanent magnet component of a permanent magnet electric machine of claim 1, wherein: the permanent magnet part is a stator, and a motor winding is positioned on the rotor.
4. A permanent magnet component for a permanent magnet electrical machine according to claim 1, 2 or 3, wherein: two near-winding permanent magnets in the pair of near-winding permanent magnets are arranged in an inverted V shape, the included angle between the two near-winding permanent magnets is larger than 180 degrees, and the included angle refers to the included angle between the surfaces of the two near-winding permanent magnets, which face away from the central line of the permanent magnet part.
5. The permanent magnet component of a permanent magnet electric machine of claim 1, wherein: at least one permanent magnet layer far away from the motor winding side, namely a far winding permanent magnet layer, is provided with at least one pair of permanent magnets, namely far winding permanent magnets, and the center lines of the magnetic poles of two far winding permanent magnets in the pair of far winding permanent magnets are intersected at one side, close to the motor winding, of the far winding permanent magnet layer.
6. The permanent magnet component of a permanent magnet electric machine of claim 5, wherein: two far winding permanent magnets in the pair of far winding permanent magnets are arranged in a V shape, the included angle between the two far winding permanent magnets is smaller than 180 degrees, and the included angle refers to the included angle between the surfaces of the two far winding permanent magnets, which face away from the central line of the permanent magnet part.
7. The permanent magnet component of a permanent magnet electric machine of claim 6, wherein: two near-winding permanent magnets in the pair of near-winding permanent magnets are arranged in an inverted V shape, the included angle between the two near-winding permanent magnets is larger than 180 degrees, and the included angle refers to the included angle between the surfaces of the two near-winding permanent magnets, which face away from the center line of the permanent magnet part; two near winding permanent magnets in the pair of near winding permanent magnets and two far winding permanent magnets in the pair of far winding permanent magnets are symmetrical about the same symmetry axis.
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| CN201921681014.9U CN210246434U (en) | 2019-10-09 | 2019-10-09 | Permanent magnet component of permanent magnet motor |
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| CN201921681014.9U CN210246434U (en) | 2019-10-09 | 2019-10-09 | Permanent magnet component of permanent magnet motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635596A (en) * | 2019-10-09 | 2019-12-31 | 苏州阿福机器人有限公司 | Permanent magnet component of permanent magnet motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110635596A (en) * | 2019-10-09 | 2019-12-31 | 苏州阿福机器人有限公司 | Permanent magnet component of permanent magnet motor |
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