CN213461297U - Novel mixed excitation permanent magnet motor rotor structure - Google Patents
Novel mixed excitation permanent magnet motor rotor structure Download PDFInfo
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- CN213461297U CN213461297U CN202023086376.9U CN202023086376U CN213461297U CN 213461297 U CN213461297 U CN 213461297U CN 202023086376 U CN202023086376 U CN 202023086376U CN 213461297 U CN213461297 U CN 213461297U
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- excitation magnet
- rotor structure
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Abstract
The utility model provides a novel mix excitation permanent-magnet machine rotor structure, including the pivot, rotor core and a plurality of main excitation magnet and vice excitation magnet, rotor core's middle part is located in the pivot, rotor core outside circumference is equipped with a plurality of main excitation magnets, pivot outside circumference is equipped with a plurality of pairs of excitation magnet grooves, vice excitation magnet and vice excitation magnet groove one-to-one, vice excitation magnet is equipped with at a distance from the magnetic slot along the both ends of circumference direction, and the coercive force of main excitation magnet is greater than the coercive force of vice excitation magnet. The utility model discloses can effectively weaken the higher harmonic in the magnetic field, realize the optimization of magnetic field waveform to reduce the eddy current loss in the magnetic field.
Description
Technical Field
The utility model belongs to the technical field of the motor, concretely relates to novel mixed excitation permanent-magnet machine rotor structure.
Background
The motor is an important component of modern industrial production and human life, and benefits from the characteristics of high magnetic energy product and low loss of the rare earth permanent magnet, and the rare earth permanent magnet motor has the advantages of high power density and high efficiency, has quick dynamic response and is widely applied to a plurality of fields. The permanent magnet synchronous motor can be divided into a surface-mounted rotor and a built-in rotor according to the structural form of the rotor, wherein the magnetic circuit structure of the surface-mounted rotor has the advantages of small magnetic leakage, simple process and the like. In order to inhibit the reduction of the eddy current loss of the rotor, the rotor magnets are frequently segmented along the axial direction and the radial direction, but the air gap magnetic field tends to be square wave distribution, and the design requirement of the sine wave magnetic field is difficult to realize.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provided a novel mixed excitation permanent-magnet machine rotor structure, the utility model discloses can effectively weaken the higher harmonic in the magnetic field, realize the optimization of magnetic field waveform to reduce the eddy current loss in the magnetic field.
In order to achieve the above object, the present invention provides the following solutions: the utility model provides a mix excitation permanent magnet machine rotor structure, includes the pivot, rotor core and a plurality of main excitation magnet and vice excitation magnet, rotor core's middle part is located to the pivot, rotor core outside circumference is equipped with a plurality of main excitation magnets, pivot outside circumference is equipped with a plurality of vice excitation magnet grooves, vice excitation magnet and vice excitation magnet groove one-to-one, vice excitation magnet is equipped with magnetism isolating groove along the both ends of circumferential direction, and the coercive force of main excitation magnet is greater than the coercive force of vice excitation magnet.
The main excitation magnet and the auxiliary excitation magnet are both arc-shaped magnetic steels.
The main excitation magnet is closely adhered to the rotor iron core, and no air gap exists.
The primary excitation magnet is magnetic steel made of a rubidium-iron-boron material, and the secondary excitation magnet is magnetic steel made of a ferrite material.
The auxiliary excitation magnet groove and the magnetism isolating groove are all through grooves.
The main excitation magnet and the auxiliary excitation magnet are both magnetized in the radial direction.
And a magnetic isolation copper sleeve is arranged on the outer side of the rotating shaft.
By adopting the technical scheme, the main excitation magnet is placed on the surface of the rotor core, the auxiliary excitation magnet is placed inside the rotor core, the main excitation magnet and the auxiliary excitation magnet are made of permanent magnetic materials with different coercive forces, so that the air gap magnetic field tends to be distributed in a sine wave manner, the main excitation magnet is made of the iron-rubidium-boron material, so that the sufficient magnetic flux density in the air gap magnetic field can be ensured, and the auxiliary excitation magnet is made of the ferrite material, so that the cost is saved, and the eddy current loss in the magnetic field can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of the rotor structure of the hybrid excitation permanent magnet motor of the present invention.
In the attached figure 1: 1. the rotor comprises a rotating shaft, 2, a rotor iron core, 3, a main excitation magnet, 4, an auxiliary excitation magnet, 5 and a magnetism isolating groove.
Detailed Description
In order to make the technical method, purpose and functions of the present invention easy to understand, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to the attached figure 1 of the specification, the rotor structure of the hybrid excitation permanent magnet motor comprises a rotating shaft, a rotor core, a plurality of main excitation magnets and auxiliary excitation magnets, wherein the rotating shaft is arranged in the middle of the rotor core, the main excitation magnets are arranged on the circumference of the outer side of the rotor core, a plurality of auxiliary excitation magnet grooves are arranged on the circumference of the outer side of the rotating shaft, the auxiliary excitation magnets correspond to the auxiliary excitation magnet grooves one by one, magnetic isolation grooves are formed in two ends of each auxiliary excitation magnet in the circumferential direction, and the coercive force of each main excitation magnet is larger than that of each auxiliary excitation magnet.
The main excitation magnet and the auxiliary excitation magnet are both arc-shaped magnetic steels.
The main excitation magnet is closely adhered to the rotor iron core, and no air gap exists.
The primary excitation magnet is magnetic steel made of a rubidium-iron-boron material, and the secondary excitation magnet is magnetic steel made of a ferrite material.
The auxiliary excitation magnet groove and the magnetism isolating groove are all through grooves.
The main excitation magnet and the auxiliary excitation magnet are both magnetized in the radial direction.
And a magnetic isolation copper sleeve is arranged on the outer side of the rotating shaft.
The present embodiment is only illustrative of the present patent, and does not limit the scope of protection of the patent, and those skilled in the art can make modifications to the part of the patent without departing from the spirit of the patent.
Claims (7)
1. The utility model provides a novel mixed excitation permanent-magnet machine rotor structure which characterized in that: the rotor includes the pivot, rotor core and a plurality of main excitation magnet and vice excitation magnet, rotor core's middle part is located to the pivot, rotor core outside circumference is equipped with a plurality of main excitation magnets, pivot outside circumference is equipped with a plurality of vice excitation magnet grooves, vice excitation magnet and vice excitation magnet groove one-to-one, vice excitation magnet is equipped with the magnetism isolating groove along the both ends of circumferential direction, and the coercive force of main excitation magnet is greater than the coercive force of vice excitation magnet.
2. The novel rotor structure of the hybrid excitation permanent magnet motor according to claim 1, wherein: the main excitation magnet and the auxiliary excitation magnet are both arc-shaped magnetic steels.
3. The novel rotor structure of the hybrid excitation permanent magnet motor according to claim 1, wherein: the main excitation magnet is closely adhered to the rotor iron core, and no air gap exists.
4. The novel rotor structure of the hybrid excitation permanent magnet motor according to claim 1, wherein: the primary excitation magnet is magnetic steel made of a rubidium-iron-boron material, and the secondary excitation magnet is magnetic steel made of a ferrite material.
5. The novel rotor structure of the hybrid excitation permanent magnet motor according to claim 1, wherein: the auxiliary excitation magnet groove and the magnetism isolating groove are all through grooves.
6. The novel rotor structure of the hybrid excitation permanent magnet motor according to claim 1, wherein: the main excitation magnet and the auxiliary excitation magnet are both magnetized in the radial direction.
7. The novel rotor structure of the hybrid excitation permanent magnet motor according to claim 1, wherein: and a magnetic isolation copper sleeve is arranged on the outer side of the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023086376.9U CN213461297U (en) | 2020-12-21 | 2020-12-21 | Novel mixed excitation permanent magnet motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023086376.9U CN213461297U (en) | 2020-12-21 | 2020-12-21 | Novel mixed excitation permanent magnet motor rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213461297U true CN213461297U (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023086376.9U Expired - Fee Related CN213461297U (en) | 2020-12-21 | 2020-12-21 | Novel mixed excitation permanent magnet motor rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213461297U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542911A (en) * | 2020-12-21 | 2021-03-23 | 哈尔滨理工大学 | Novel mixed excitation permanent magnet motor rotor structure |
-
2020
- 2020-12-21 CN CN202023086376.9U patent/CN213461297U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542911A (en) * | 2020-12-21 | 2021-03-23 | 哈尔滨理工大学 | Novel mixed excitation permanent magnet motor rotor structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210615 Termination date: 20211221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |