CN114337167A - Double-rotor structure of permanent magnet motor - Google Patents
Double-rotor structure of permanent magnet motor Download PDFInfo
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- CN114337167A CN114337167A CN202111345845.0A CN202111345845A CN114337167A CN 114337167 A CN114337167 A CN 114337167A CN 202111345845 A CN202111345845 A CN 202111345845A CN 114337167 A CN114337167 A CN 114337167A
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- rotor
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- outer rotor
- inner rotor
- magnetic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a double rotor of a motor, which is characterized by comprising: the outer rotor, the inner rotor, rotor connection dish are used for fixed outer rotor and inner rotor for the rotational speed of interior outer rotor is the same. The magnetic steel of the outer rotor consists of magnetic steel groups with different radians, the magnetic steel of the inner rotor consists of magnetic steel groups with different radians, and the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the tooth space torque is further reduced, and the torque pulsation is reduced while the higher torque density is ensured.
Description
Technical Field
The invention relates to the field of motors, in particular to a double-rotor structure of a permanent magnet motor.
Background
The cogging torque of the permanent magnet motor is torque generated by interaction between a permanent magnet magnetic field and a slotted iron core when a winding is not electrified, can generate adverse effect on stable operation of the motor, can generate vibration and noise, is an influence on the performance of a motor speed control and position control system, and is one of the problems needing to be considered in permanent magnet motor design. For the surface type and common built-in permanent magnet motor with equal stator and rotor unilateral slotting, the weakening measures of the cogging torque can be divided into four types: the matching of the number of the armature teeth and the number of the motor poles is changed, armature parameters are changed, parameters of the permanent magnet rotor are changed, and the influence of cogging torque is counteracted through a motor control method.
At present, the cogging torque of a surface type and built-in type unilateral slotted permanent magnet motor is weakened mainly by reasonably selecting the pole slot matching, changing armature cogging parameters and controlling an algorithm.
Although the cogging torque and the torque ripple can be reduced to a certain extent by cutting the permanent magnets, the skewed pole chutes, optimizing the tooth shapes or adopting a complex driving algorithm, the reduction of the output torque and the increase of the manufacturing difficulty cannot be avoided, so that the existing double-rotor motor has the problem of uncoordinated torque density improvement and torque ripple inhibition.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a motor dual-rotor for reducing the cogging torque and the torque ripple of a dual-rotor motor while maintaining a high torque density.
To achieve the above object, the present invention provides a double rotor of a motor, comprising:
an outer rotor, comprising:
a cylindrical outer rotor yoke is provided,
the outer rotor magnetic steel groups are uniformly distributed along the circumferential direction of the outer rotor yoke; the outer rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different;
an inner rotor, comprising:
is a cylindrical inner rotor yoke, and is characterized in that,
the inner rotor magnetic steel groups are uniformly distributed along the circumferential direction of the cylindrical inner rotor yoke; the inner rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different;
the outer rotor magnetic steel groups correspond to the inner rotor magnetic steel groups one by one and are the same in number; the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor;
and the rotor connecting disc is used for fixing the outer rotor and the inner rotor, so that the rotating speeds of the inner rotor and the outer rotor are the same.
Furthermore, the magnetic steel is fixed on the inner and outer rotor yokes in a surface-mounted manner.
Furthermore, the outer rotor magnetic steel is fixed on the inner side of the outer rotor yoke in a surface-mounted mode, and the inner rotor magnetic steel is fixed on the outer side of the inner rotor yoke in a surface-mounted mode.
Furthermore, the inner side of the outer rotor yoke is provided with a wedge-shaped groove for fixing the magnetic steel, and the outer side of the inner rotor yoke is provided with a wedge-shaped groove for fixing the magnetic steel.
Furthermore, the thickness of the outer rotor magnetic steel is the same, the thickness of the inner rotor magnetic steel is the same, and the thickness of the inner rotor magnetic steel is larger than that of the outer rotor magnetic steel.
Furthermore, the length ratio of two magnetic steels with different lengths along the circumferential direction of the outer rotor magnetic steel group ranges from 1.5 to 1.3: 1.
Furthermore, the length ratio of two magnetic steels with different lengths along the circumferential direction of the inner rotor magnetic steel group ranges from 1.5 to 1.1: 1.
Furthermore, the outer convex surface of the inner rotor magnetic steel is opposite to the inner concave surface of the outer rotor magnetic steel.
Further, the rotor connecting disc comprises an inner rotor connecting disc and an outer rotor connecting disc, and a straight groove is formed in the connecting part.
Furthermore, the rotor connecting disc comprises an inner rotor connecting disc and an outer rotor connecting disc, and the connecting part is provided with an inclined groove.
The beneficial technical effect of the invention is that the magnetic steel of the outer rotor is composed of magnetic steel groups with different radians, the magnetic steel of the inner rotor is composed of magnetic steel groups with different radians, and the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the tooth space torque is further reduced, and the torque pulsation is reduced while the higher torque density is ensured.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a perspective view of a dual rotor in accordance with a preferred embodiment of the present invention;
fig. 2 is a perspective view of a cylindrical outer rotor yoke according to a preferred embodiment of the present invention;
FIG. 3 is a perspective view of a cylindrical inner rotor yoke of a preferred embodiment of the present invention;
fig. 4 is a plan view of a rotor connecting disc according to a preferred embodiment of the present invention.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in figure 1 of the drawings, in which,
a preferred embodiment of the present invention is a dual rotor for an electric machine, comprising:
an outer rotor, comprising:
a cylindrical outer rotor yoke, as shown in fig. 2, for fixing the outer rotor magnetic steel set;
the outer rotor magnetic steel groups are uniformly distributed along the circumferential direction of the outer rotor yoke; the outer rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in a radial direction or in parallel, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
an inner rotor, comprising:
a cylindrical inner rotor yoke, as shown in fig. 3, for fixing the inner rotor magnetic steel set;
the inner rotor magnetic steel groups are uniformly distributed along the circumferential direction of the cylindrical inner rotor yoke; the inner rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
the outer rotor magnetic steel groups correspond to the inner rotor magnetic steel groups one by one and are the same in number; the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the torque of the inner rotor and the torque of the outer rotor are superposed, so that the tooth socket torque is further reduced, and the torque pulsation is reduced;
and a rotor connecting disc, as shown in fig. 4, for fixing the outer rotor and the inner rotor so that the rotation speeds of the inner and outer rotors are the same. The torque of the inner rotor and the torque of the outer rotor are overlapped, so that the tooth space torque is further reduced, and the torque pulsation is reduced.
The magnetic steel surface is fixed on the inner and outer rotor yokes. The outer rotor magnetic steel surface-mounted type fixes the inner side of the outer rotor yoke, and the inner rotor magnetic steel surface-mounted type fixes the outer side of the inner rotor yoke. The inner side of the outer rotor yoke is provided with carbon fibers for binding and fixing the magnetic steel, and the outer side of the inner rotor yoke is provided with carbon fibers for binding the magnetic steel. The thickness of outer rotor magnet steel is the same, and the thickness of inner rotor magnet steel is greater than the thickness of outer rotor magnet steel the same. The length ratio of two magnetic steels with different lengths along the circumferential direction of the outer rotor magnetic steel group ranges from 1.5 to 1.3: 1. The length ratio of the two magnetic steels with different lengths along the circumferential direction of the inner rotor magnetic steel group ranges from 1.5 to 1.1: 1. The outer convex surface of the inner rotor magnetic steel is opposite to the inner concave surface of the outer rotor magnetic steel.
The rotor connecting disc comprises an inner rotor connecting disc and an outer rotor connecting disc, and a straight groove is formed in the connecting part.
Another preferred embodiment of the present invention is a dual rotor of a motor, comprising:
an outer rotor, comprising:
a cylindrical outer rotor yoke, as shown in fig. 2, for fixing the outer rotor magnetic steel set;
the outer rotor magnetic steel groups are uniformly distributed along the circumferential direction of the outer rotor yoke; the outer rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in a radial direction or in parallel, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
an inner rotor, comprising:
a cylindrical inner rotor yoke, as shown in fig. 3, for fixing the inner rotor magnetic steel set;
the inner rotor magnetic steel groups are uniformly distributed along the circumferential direction of the cylindrical inner rotor yoke; the inner rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
the outer rotor magnetic steel groups correspond to the inner rotor magnetic steel groups one by one and are the same in number; the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the torque of the inner rotor and the torque of the outer rotor are superposed, so that the tooth socket torque is further reduced, and the torque pulsation is reduced;
and a rotor connecting disc, as shown in fig. 4, for fixing the outer rotor and the inner rotor so that the rotation speeds of the inner and outer rotors are the same. The torque of the inner rotor and the torque of the outer rotor are overlapped, so that the tooth space torque is further reduced, and the torque pulsation is reduced.
The magnetic steel surface is embedded and fixed on the inner and outer rotor yokes. The surface of the outer rotor magnetic steel is embedded and fixed on the inner side of the outer rotor yoke, and the surface of the inner rotor magnetic steel is embedded and fixed on the outer side of the inner rotor yoke. The inner side of the outer rotor yoke is provided with a wedge-shaped groove for fixing the magnetic steel, and the outer side of the inner rotor yoke is provided with a wedge-shaped groove for fixing the magnetic steel. The thickness of outer rotor magnet steel is the same, and the thickness of inner rotor magnet steel is greater than the thickness of outer rotor magnet steel the same. The length ratio of two magnetic steels with different lengths along the circumferential direction of the outer rotor magnetic steel group ranges from 1.5 to 1.3: 1. The length ratio of the two magnetic steels with different lengths along the circumferential direction of the inner rotor magnetic steel group ranges from 1.5 to 1.1: 1. The outer convex surface of the inner rotor magnetic steel is opposite to the inner concave surface of the outer rotor magnetic steel.
The rotor connecting disc comprises an inner rotor connecting disc and an outer rotor connecting disc, and a straight groove is formed in the connecting part.
Another preferred embodiment of the present invention is a dual rotor of a motor, comprising:
an outer rotor, comprising:
a cylindrical outer rotor yoke, as shown in fig. 2, for fixing the outer rotor magnetic steel set; the outer ring of the cylindrical outer rotor yoke is provided with a plurality of axial grooves which are uniformly distributed; the groove is used for reducing the weight and inertia of the outer rotor; the heat dissipation area of the outer rotor during rotation is increased, and heat dissipation of the outer rotor is facilitated.
The outer rotor magnetic steel groups are uniformly distributed along the circumferential direction of the outer rotor yoke; the outer rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in a radial direction or in parallel, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
an inner rotor, comprising:
a cylindrical inner rotor yoke, as shown in fig. 3, for fixing the inner rotor magnetic steel set;
the inner rotor magnetic steel groups are uniformly distributed along the circumferential direction of the cylindrical inner rotor yoke; the inner rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
the outer rotor magnetic steel groups correspond to the inner rotor magnetic steel groups one by one and are the same in number; the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the torque of the inner rotor and the torque of the outer rotor are superposed, so that the tooth socket torque is further reduced, and the torque pulsation is reduced;
and a rotor connecting disc, as shown in fig. 4, for fixing the outer rotor and the inner rotor so that the rotation speeds of the inner and outer rotors are the same. The torque of the inner rotor and the torque of the outer rotor are overlapped, so that the tooth space torque is further reduced, and the torque pulsation is reduced.
The magnetic steel surface is embedded and fixed on the inner and outer rotor yokes. The surface of the outer rotor magnetic steel is embedded and fixed on the inner side of the outer rotor yoke, and the surface of the inner rotor magnetic steel is embedded and fixed on the outer side of the inner rotor yoke. The inner side of the outer rotor yoke is provided with a wedge-shaped groove for fixing the magnetic steel, and the outer side of the inner rotor yoke is provided with a wedge-shaped groove for fixing the magnetic steel. The thickness of outer rotor magnet steel is the same, and the thickness of inner rotor magnet steel is greater than the thickness of outer rotor magnet steel the same. The length ratio of two magnetic steels with different lengths along the circumferential direction of the outer rotor magnetic steel group ranges from 1.5 to 1.3: 1. The length ratio of the two magnetic steels with different lengths along the circumferential direction of the inner rotor magnetic steel group ranges from 1.5 to 1.1: 1. The outer convex surface of the inner rotor magnetic steel is opposite to the inner concave surface of the outer rotor magnetic steel.
The rotor connecting disc comprises an inner rotor connecting disc and an outer rotor connecting disc, and a straight groove is formed in the connecting part.
Another preferred embodiment of the present invention is a dual rotor of a motor, comprising:
an outer rotor, comprising:
a cylindrical outer rotor yoke, as shown in fig. 2, for fixing the outer rotor magnetic steel set; the outer ring of the cylindrical outer rotor yoke is provided with a plurality of axial grooves which are uniformly distributed; the groove is used for reducing the weight and inertia of the outer rotor; the heat dissipation area of the outer rotor during rotation is increased, and heat dissipation of the outer rotor is facilitated.
The outer rotor magnetic steel groups are uniformly distributed along the circumferential direction of the outer rotor yoke; the outer rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in a radial direction or in parallel, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
an inner rotor, comprising:
a cylindrical inner rotor yoke, as shown in fig. 3, for fixing the inner rotor magnetic steel set;
the inner rotor magnetic steel groups are uniformly distributed along the circumferential direction of the cylindrical inner rotor yoke; the inner rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different; the tooth socket torque is reduced, and the torque pulsation is reduced;
the outer rotor magnetic steel groups correspond to the inner rotor magnetic steel groups one by one and are the same in number; the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the torque of the inner rotor and the torque of the outer rotor are superposed, so that the tooth socket torque is further reduced, and the torque pulsation is reduced;
and a rotor connecting disc, as shown in fig. 4, for fixing the outer rotor and the inner rotor so that the rotation speeds of the inner and outer rotors are the same. The torque of the inner rotor and the torque of the outer rotor are overlapped, so that the tooth space torque is further reduced, and the torque pulsation is reduced.
The magnetic steel is internally fixed in the inner and outer rotor yokes. The outer rotor magnetic steel is internally fixed inside the outer rotor yoke, and the inner rotor magnetic steel is internally fixed inside the inner rotor yoke. The magnetic isolating groove is arranged between the adjacent magnetic steels of the outer rotor yoke and used for blocking magnetic flux, and the magnetic isolating groove is arranged between the adjacent magnetic steels of the inner rotor yoke and used for blocking magnetic flux. The thickness of outer rotor magnet steel is the same, and the thickness of inner rotor magnet steel is greater than the thickness of outer rotor magnet steel the same. The length ratio of two magnetic steels with different lengths along the circumferential direction of the outer rotor magnetic steel group ranges from 1.5 to 1.3: 1. The length ratio of the two magnetic steels with different lengths along the circumferential direction of the inner rotor magnetic steel group ranges from 1.5 to 1.1: 1. The outer convex surface of the inner rotor magnetic steel is opposite to the inner concave surface of the outer rotor magnetic steel.
The rotor connecting disc comprises an inner rotor connecting disc and an outer rotor connecting disc, and a straight groove is formed in the connecting part.
The magnetic steel of the outer rotor consists of magnetic steel groups with different radians, the magnetic steel of the inner rotor consists of magnetic steel groups with different radians, and the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor; the tooth space torque is further reduced, and the torque pulsation is reduced while the higher torque density is ensured.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A dual rotor for an electric machine, comprising:
an outer rotor, comprising:
a cylindrical outer rotor yoke is provided,
the outer rotor magnetic steel groups are uniformly distributed along the circumferential direction of the outer rotor yoke; the outer rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different;
an inner rotor, comprising:
a cylindrical inner rotor yoke is provided,
the inner rotor magnetic steel groups are uniformly distributed along the circumferential direction of the cylindrical inner rotor yoke; the inner rotor magnetic steel group comprises two magnetic steels with different lengths along the circumferential direction; the magnetic steels are magnetized in the radial direction, and the polarities of two adjacent magnetic steels are different;
the outer rotor magnetic steel groups correspond to the inner rotor magnetic steel groups one by one and are the same in number; the longer arc-shaped magnetic steel of the outer rotor is opposite to the shorter arc-shaped magnetic steel of the inner rotor; the shorter arc-shaped magnetic steel of the outer rotor is opposite to the longer arc-shaped magnetic steel of the inner rotor;
the rotor connecting disc is used for fixing the outer rotor and the inner rotor so that the rotating speeds of the inner rotor and the outer rotor are the same;
the ends of the cylindrical outer rotor yoke and the cylindrical inner rotor yoke are respectively fixed on the rotor connecting disc.
2. The dual rotor of claim 1, wherein said magnetic steel is surface mounted to the inner and outer rotor yokes.
3. The dual rotor of claim 2, wherein the outer rotor magnets are surface mounted to fix an inner side of the outer rotor yoke and the inner rotor magnets are surface mounted to fix an outer side of the inner rotor yoke.
4. The dual rotor of claim 2, wherein the inner side of the outer rotor yoke has a wedge shaped groove for securing the magnetic steel and the outer side of the inner rotor yoke has a wedge shaped groove for securing the magnetic steel.
5. The dual rotor of claim 1, wherein the outer rotor magnetic steels are of the same thickness, the inner rotor magnetic steels are of the same thickness, and the inner rotor magnetic steels are of greater thickness than the outer rotor magnetic steels.
6. The birotor of claim 1, wherein the length ratio of two magnetic steels of the outer rotor magnetic steel set with different lengths along the circumferential direction is 1.5-1.3: 1.
7. The birotor of claim 1, wherein the ratio of the lengths of two magnetic steels of the inner rotor magnetic steel set different in length along the circumferential direction is in the range of 1.5-1.1: 1.
8. The dual rotor of claim 1, wherein said inner rotor magnetic steel outer convex surface is opposite to the opposing outer rotor magnetic steel inner concave surface magnetic pole.
9. The dual rotor of claim 1, wherein said rotor lands comprise inner rotor lands and outer rotor lands, the lands having straight slots.
10. The dual rotor of claim 1, wherein said rotor lands comprise inner rotor lands and outer rotor lands, the lands having angled slots.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297565.0A CN112994390A (en) | 2021-03-19 | 2021-03-19 | Birotor radial permanent magnet motor |
| CN2021102975650 | 2021-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114337167A true CN114337167A (en) | 2022-04-12 |
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Family Applications (11)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110297565.0A Pending CN112994390A (en) | 2021-03-19 | 2021-03-19 | Birotor radial permanent magnet motor |
| CN202111345845.0A Pending CN114337167A (en) | 2021-03-19 | 2021-11-15 | Double-rotor structure of permanent magnet motor |
| CN202122783591.2U Active CN216751485U (en) | 2021-03-19 | 2021-11-15 | Permanent magnet double-rotor motor |
| CN202111345813.0A Pending CN114499089A (en) | 2021-03-19 | 2021-11-15 | Permanent magnet double-rotor motor |
| CN202122787429.8U Active CN216751487U (en) | 2021-03-19 | 2021-11-15 | Double-rotor structure of permanent magnet motor |
| CN202111345718.0A Pending CN114337164A (en) | 2021-03-19 | 2021-11-15 | Method for reducing torque pulsation of permanent magnet double-rotor motor |
| CN202111345814.5A Pending CN114337166A (en) | 2021-03-19 | 2021-11-15 | Magnetic steel setting method of permanent magnet double-rotor motor |
| CN202122783637.0U Active CN216751486U (en) | 2021-03-19 | 2021-11-15 | Magnetic steel array of permanent magnet double-rotor motor |
| CN202111345853.5A Pending CN113890295A (en) | 2021-03-19 | 2021-11-15 | Magnetic steel array of permanent magnet double-rotor motor |
| CN202111345719.5A Pending CN114337165A (en) | 2021-03-19 | 2021-11-15 | Manufacturing method of motor double rotors |
| CN202210278400.3A Pending CN114884295A (en) | 2021-03-19 | 2022-03-21 | Double-rotor motor stator |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110297565.0A Pending CN112994390A (en) | 2021-03-19 | 2021-03-19 | Birotor radial permanent magnet motor |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122783591.2U Active CN216751485U (en) | 2021-03-19 | 2021-11-15 | Permanent magnet double-rotor motor |
| CN202111345813.0A Pending CN114499089A (en) | 2021-03-19 | 2021-11-15 | Permanent magnet double-rotor motor |
| CN202122787429.8U Active CN216751487U (en) | 2021-03-19 | 2021-11-15 | Double-rotor structure of permanent magnet motor |
| CN202111345718.0A Pending CN114337164A (en) | 2021-03-19 | 2021-11-15 | Method for reducing torque pulsation of permanent magnet double-rotor motor |
| CN202111345814.5A Pending CN114337166A (en) | 2021-03-19 | 2021-11-15 | Magnetic steel setting method of permanent magnet double-rotor motor |
| CN202122783637.0U Active CN216751486U (en) | 2021-03-19 | 2021-11-15 | Magnetic steel array of permanent magnet double-rotor motor |
| CN202111345853.5A Pending CN113890295A (en) | 2021-03-19 | 2021-11-15 | Magnetic steel array of permanent magnet double-rotor motor |
| CN202111345719.5A Pending CN114337165A (en) | 2021-03-19 | 2021-11-15 | Manufacturing method of motor double rotors |
| CN202210278400.3A Pending CN114884295A (en) | 2021-03-19 | 2022-03-21 | Double-rotor motor stator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116526722B (en) * | 2023-03-10 | 2023-12-19 | 广东白云学院 | Axial magnetic flux magnetic-yoke-free hub motor with ceramic air cooling structure |
| CN117748872B (en) * | 2024-02-21 | 2024-04-19 | 清华大学 | Radial double-rotor motor |
| CN118040928B (en) * | 2024-04-12 | 2024-06-21 | 山西观复智能科技有限公司 | Double-permanent magnet synchronous excitation motor for unmanned aerial vehicle |
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2021
- 2021-03-19 CN CN202110297565.0A patent/CN112994390A/en active Pending
- 2021-11-15 CN CN202111345845.0A patent/CN114337167A/en active Pending
- 2021-11-15 CN CN202122783591.2U patent/CN216751485U/en active Active
- 2021-11-15 CN CN202111345813.0A patent/CN114499089A/en active Pending
- 2021-11-15 CN CN202122787429.8U patent/CN216751487U/en active Active
- 2021-11-15 CN CN202111345718.0A patent/CN114337164A/en active Pending
- 2021-11-15 CN CN202111345814.5A patent/CN114337166A/en active Pending
- 2021-11-15 CN CN202122783637.0U patent/CN216751486U/en active Active
- 2021-11-15 CN CN202111345853.5A patent/CN113890295A/en active Pending
- 2021-11-15 CN CN202111345719.5A patent/CN114337165A/en active Pending
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2022
- 2022-03-21 CN CN202210278400.3A patent/CN114884295A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN114499089A (en) | 2022-05-13 |
| CN112994390A (en) | 2021-06-18 |
| CN113890295A (en) | 2022-01-04 |
| CN216751485U (en) | 2022-06-14 |
| CN114337165A (en) | 2022-04-12 |
| CN114337164A (en) | 2022-04-12 |
| CN216751487U (en) | 2022-06-14 |
| CN114337166A (en) | 2022-04-12 |
| CN216751486U (en) | 2022-06-14 |
| CN114884295A (en) | 2022-08-09 |
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