CN211481101U - Permanent magnet motor comprising angle detection device - Google Patents
Permanent magnet motor comprising angle detection device Download PDFInfo
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- CN211481101U CN211481101U CN201922484207.1U CN201922484207U CN211481101U CN 211481101 U CN211481101 U CN 211481101U CN 201922484207 U CN201922484207 U CN 201922484207U CN 211481101 U CN211481101 U CN 211481101U
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- permanent magnet
- rotor
- stator
- magnet motor
- detection device
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Abstract
The utility model provides a permanent magnet motor, which comprises a permanent magnet motor body and a rotation angle detection device; the permanent magnet motor body comprises a motor stator and a permanent magnet rotor; the magnetic poles of the permanent magnet rotor are alternately distributed along the circumferential direction; the rotation angle detection device comprises a stator and a rotor; the permanent magnet rotor and the rotor are arranged on the same shaft and rotate coaxially; the stator comprises a stator yoke and stator detection teeth positioned on the stator yoke; at most one coil is wound on each stator detection tooth; the inductance of each coil changes with a change in the rotational angle of the rotor for detecting the rotational angle of the rotor. The utility model discloses permanent-magnet machine's reliability has greatly been improved.
Description
Technical Field
The utility model belongs to the technical field of the motor, a permanent-magnet machine who contains angle detection device is related to.
Background
The industries such as electric automobiles, industrial automation, robots, textile machinery, aerospace and the like do not leave high-performance control of rotating motors, so that a motor rotation angle sensor is required, and the motor rotation angle sensor is often required to be applied in a high-temperature environment.
At present, a permanent magnet motor carries a photoelectric angle encoder, and the photoelectric angle encoder is widely used because the detection of the rotation angle of the motor can be easily realized, but the photoelectric angle encoder in the motor comprises a photoelectric component and a semiconductor device, so that the photoelectric angle encoder cannot be used in a high-temperature environment.
The permanent magnet motor is provided with a rotary transformer, so that the rotation angle can be detected, and the permanent magnet motor can be used in a high-temperature environment because a photoelectric conversion device is not used. However, such a conventional resolver generally has an excitation coil, a sine coil and a cosine coil wound around each stator tooth, i.e., 3 different coils are wound around each tooth, and there is a risk of short circuit caused by mutual friction between the coils during production and use. And 6 leads are led out from each stator tooth, and the lead is in a reliability risk due to excessive leads.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reduce the permanent-magnet machine of above-mentioned risk.
In order to achieve the above purpose, the utility model discloses a solution is:
a permanent magnet motor comprises a permanent magnet motor body and a rotation angle detection device; the permanent magnet motor body comprises a motor stator and a permanent magnet rotor; the magnetic poles of the permanent magnet rotor are alternately distributed along the circumferential direction; the rotation angle detection device comprises a stator and a rotor; the permanent magnet rotor and the rotor are arranged on the same shaft and rotate coaxially; the stator comprises a stator yoke and stator detection teeth positioned on the stator yoke; at most one coil is wound on each stator detection tooth; the inductance of each coil changes with a change in the rotational angle of the rotor for detecting the rotational angle of the rotor.
The number of pole pairs of the permanent magnet rotor is N x K, the number of salient poles of the rotor is N, and N and K are integers larger than 1.
Preferably, the number of pole pairs of the permanent magnet rotor is S, the number of salient poles of the rotor is 1, and S is a positive integer.
Preferably, the number of pole pairs of the permanent magnet rotor is M, and the number of salient poles of the rotor is M, wherein M is a positive integer.
The permanent magnet motor body is a permanent magnet motor or a permanent magnet generator.
Due to the adoption of the scheme, the beneficial effects of the utility model are that: the short circuit risk between coils on each tooth is eliminated, and the reliability of the permanent magnet motor is greatly improved.
Drawings
Fig. 1 is a flowchart illustrating a control of a permanent magnet motor according to a first embodiment of the present invention;
fig. 2 is a graph of the mechanical angles of the first and second angles with respect to the shaft in the first embodiment of the present invention;
fig. 3 is a graph of the mechanical angles of the first and second angles with respect to the shaft in a second embodiment of the present invention;
fig. 4 is a flowchart illustrating a control of a permanent magnet motor according to a third embodiment of the present invention;
fig. 5 is a graph of a mechanical angle of a first angle relative to a shaft in a third embodiment of the present invention;
Detailed Description
The invention will be further described with reference to the following examples of embodiments shown in the drawings.
The utility model provides a permanent magnet motor, which comprises a permanent magnet motor body and a rotation angle detection device; the permanent magnet motor body comprises a motor stator and a permanent magnet rotor; the magnetic poles of the permanent magnet rotor are alternately distributed along the circumferential direction; the rotation angle detection device comprises a stator and a rotor; the permanent magnet rotor and the rotor are arranged on the same shaft and rotate coaxially; the stator comprises a stator yoke and stator detection teeth positioned on the stator yoke; at most one coil is wound on each stator detection tooth; the inductance of each coil changes with a change in the rotational angle of the rotor for detecting the rotational angle of the rotor. The permanent magnet motor body may be a permanent magnet motor or a permanent magnet generator.
The first embodiment:
in this embodiment, K is 2, and N is 2, that is, in this embodiment, the permanent magnet motor body is a permanent magnet motor having 4 pole pairs, the number of salient poles of the rotor of the rotation angle detection device is 2, the permanent magnet rotor and the rotor are mounted on the same shaft to coaxially rotate, and the stator of the permanent magnet motor and the stator of the rotation angle detection device are mounted in a common stator housing (not shown in the figure). Fig. 1 is a flowchart of a permanent magnet motor control according to a first embodiment of the present invention, a permanent magnet motor system is divided into a permanent magnet motor and a driving system, a position signal output by a rotation angle detection device is connected to an input terminal of a decoding circuit, a first angle (e.g., 101 in fig. 2) is output after decoding, a horizontal axis in fig. 2 corresponds to a mechanical angle that a rotating shaft of the permanent magnet motor rotates, an angle conversion circuit multiplies the first angle by a coefficient Z (a pole pair number of the permanent magnet motor is 4, a cam number of a rotor is 2, Z is 2) and divides by 360 to obtain a remainder to obtain a second angle (e.g., 102 in fig. 2), a period of converting the second angle is the same as a period of a magnetic field of a rotor of the permanent magnet motor, and the second angle is input to the driving circuit of the permanent magnet motor, i..
Second embodiment:
in this embodiment, S is equal to 8, that is, in this embodiment, the permanent magnet motor body is a permanent magnet motor with 8 pole pairs, the number of salient poles of the rotor of the rotation angle detection device is 1, the permanent magnet rotor and the rotor are mounted on the same shaft to coaxially rotate, and the stator of the permanent magnet motor and the stator of the rotation angle detection device are mounted in a common stator housing (not shown in the figure). The utility model discloses permanent magnet motor control flow chart also can refer to fig. 1 in the second embodiment, and the permanent magnet motor system divide into permanent magnet motor and actuating system two parts, and the position signal connection of rotation angle detection device output is to decoding circuit's input, decodes the first angle of back output (like 201 in fig. 3), and the cross axle corresponds the mechanical angle that the permanent magnet motor pivot was rotated in fig. 3, and the first angle of motor shaft per revolution a week changes 360, so can realize the absolute position detection of pivot. The angle conversion circuit multiplies the first angle by a coefficient Z (the pole pair number of the permanent magnet motor is 8, the number of salient poles of the rotor is 1, and Z is 8) and divides the first angle by 360 to obtain a second angle (as shown in fig. 3, 202), so that the period of the second angle is the same as the period of the magnetic field of the rotor of the permanent magnet motor, and the second angle is input to the permanent magnet motor driving circuit, so that the operation of the permanent magnet motor can be controlled by a known method. The present embodiment enables absolute position control, in particular simplifying the control system for robot applications.
The third embodiment:
in this embodiment, M is 4, that is, in this embodiment, the permanent magnet motor body is a permanent magnet motor with 4 pole pairs, the number of salient poles of the rotor of the rotation angle detection device is 4, the permanent magnet rotor and the rotor are mounted on the same shaft to coaxially rotate, and the stator of the permanent magnet motor and the stator of the rotation angle detection device are mounted in a common stator housing (not shown in the figure). Fig. 4 is the control flow chart of the permanent magnet motor in the third embodiment of the present invention, the permanent magnet motor system is divided into two parts, namely, a permanent magnet motor and a driving system, the position signal output by the rotation angle detection device is connected to the input end of the decoding circuit, and the first angle signal (e.g., 301 in fig. 5) is output after decoding, the cross shaft in fig. 5 corresponds to the mechanical angle rotated by the rotating shaft of the permanent magnet motor, the period of the first angle signal is the same as the period of the magnetic field of the rotor of the permanent magnet motor, and the angle conversion is not required, so that the driving system circuit is simplified.
The embodiments described above are intended to facilitate one of ordinary skill in the art to understand and practice the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments herein, and those skilled in the art should understand that modifications and alterations made without departing from the scope of the present invention are within the protection scope of the present invention.
Claims (6)
1. A permanent magnet electric machine characterized by: the permanent magnet motor comprises a permanent magnet motor body and a rotation angle detection device; the permanent magnet motor body comprises a motor stator and a permanent magnet rotor; the magnetic poles of the permanent magnet rotor are alternately distributed along the circumferential direction; the rotation angle detection device comprises a stator and a rotor; the permanent magnet rotor and the rotor are arranged on the same shaft and rotate coaxially; the stator comprises a stator yoke and stator detection teeth on the stator yoke; at most one coil is wound on each stator detection tooth; the inductance of each of the coils varies with a variation in the rotational angle of the rotor for detecting the rotational angle of the rotor.
2. The permanent magnet electric machine of claim 1, wherein: the number of pole pairs of the permanent magnet rotor is N x K, the number of salient poles of the rotor is N, and N and K are integers greater than 1.
3. The permanent magnet electric machine of claim 1, wherein: the number of pole pairs of the permanent magnet rotor is S, the number of salient poles of the rotor is 1, and S is a positive integer.
4. The permanent magnet electric machine of claim 1, wherein: the number of pole pairs of the permanent magnet rotor is M, the number of salient poles of the rotor is M, and M is a positive integer.
5. The permanent magnet electric machine of claim 1, wherein: the permanent magnet motor body is a permanent magnet motor.
6. The permanent magnet electric machine of claim 1, wherein: the permanent magnet motor body is a permanent magnet generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922484207.1U CN211481101U (en) | 2019-12-31 | 2019-12-31 | Permanent magnet motor comprising angle detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922484207.1U CN211481101U (en) | 2019-12-31 | 2019-12-31 | Permanent magnet motor comprising angle detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211481101U true CN211481101U (en) | 2020-09-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922484207.1U Active CN211481101U (en) | 2019-12-31 | 2019-12-31 | Permanent magnet motor comprising angle detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211481101U (en) |
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2019
- 2019-12-31 CN CN201922484207.1U patent/CN211481101U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211022 Address after: 150001 No. 1, building 1, No. 126, customs Street, Nangang District, Harbin, Heilongjiang Province Patentee after: Gao Hongwei Address before: 200000 room 1495, building 2, No. 228, Qianqian Road, Fengxian District, Shanghai Patentee before: SHANGHAI SHI YU ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211207 Address after: 215431 room 577, floor 5, building 1, Hutai fashion, No. 10, Nanhai Road, Liuhe Town, Taicang City, Suzhou City, Jiangsu Province Patentee after: Suzhou Yuze Intelligent Technology Co.,Ltd. Address before: 150001 No. 1, building 1, No. 126, customs Street, Nangang District, Harbin, Heilongjiang Province Patentee before: Gao Hongwei |