CN113381525A - Low-cost hybrid magnetic steel permanent magnet motor and use method thereof - Google Patents
Low-cost hybrid magnetic steel permanent magnet motor and use method thereof Download PDFInfo
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- CN113381525A CN113381525A CN202110394844.9A CN202110394844A CN113381525A CN 113381525 A CN113381525 A CN 113381525A CN 202110394844 A CN202110394844 A CN 202110394844A CN 113381525 A CN113381525 A CN 113381525A
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- stator
- permanent magnet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to the technical field of motor manufacturing, in particular to a low-cost hybrid magnetic steel permanent magnet motor and a use method thereof; the stator mechanism comprises a stator iron core and a stator winding; the rotor mechanism is matched with the stator mechanism and comprises a rotor iron core, a rectangular rare earth neodymium iron boron permanent magnet, a rectangular non-rare earth ferrite permanent magnet and a trapezoidal non-rare earth ferrite permanent magnet; the stator core is uniformly provided with a plurality of stator slots along the circumferential direction, a stator tooth part is formed between every two adjacent stator slots, and the outer ends of the adjacent stator teeth are connected to form a stator yoke part; the stator winding is arranged in the stator slot; the plurality of rotor iron cores are in a fan shape and are uniformly surrounded into a circle along the circumferential direction of the stator iron core; the rectangular rare earth neodymium iron boron permanent magnet is clamped between two adjacent rotor cores. The invention aims to provide a low-cost hybrid magnetic steel permanent magnet motor and a use method thereof aiming at the defects in the prior art, so that the cost of the motor is reduced.
Description
Technical Field
The invention relates to the technical field of motor manufacturing, in particular to a low-cost hybrid magnetic steel permanent magnet motor and a using method thereof.
Background
The hybrid magnetic steel permanent magnet motor places both the permanent magnet and the stator winding on the stator, and the rotor is only an iron core provided with salient poles, and has no winding and permanent magnet.
In the prior art, a permanent magnet synchronous motor is mainly divided into a radial magnetization structure and a tangential magnetization structure according to different magnetization directions of rotor permanent magnets. The radial magnetization permanent magnet synchronous motor is generally applied due to simple structure and processing technology, and the two permanent magnets in the tangential magnetization permanent magnet synchronous motor are connected in parallel to provide magnetic flux per pole of the motor and have a magnetism gathering effect, so that the air gap flux density of the motor can be improved, and the motor has higher torque density, therefore, the tangential magnetic steel permanent magnet motor has wide application prospect in the fields of new energy automobiles, household appliances, wind driven generators and the like. However, the tangential magnetic steel permanent magnet motor with the existing structure has the defects of large material consumption, high cost and the like of the rare earth neodymium iron boron permanent magnet, and the application of the tangential magnetic steel permanent magnet motor is limited.
In view of the above problems, the present designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is matched with the application of theory to actively make research and innovation, so as to design a low-cost hybrid magnetic steel permanent magnet motor and a use method thereof, which can effectively reduce the usage amount of rare earth neodymium iron boron permanent magnet, improve the torque density of the motor, and reduce the motor cost.
Disclosure of Invention
The invention aims to provide a low-cost mixed magnetic steel permanent magnet motor and a using method thereof aiming at the defects in the prior art, so that the using amount of rare earth neodymium iron boron permanent magnets can be effectively reduced, the torque density of the motor is improved, and the cost of the motor is reduced.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method comprises the following steps:
the stator mechanism comprises a stator iron core and a stator winding;
the rotor mechanism is matched with the stator mechanism to form a magnetic field of a closed loop, and comprises a rotor iron core, a rectangular rare earth neodymium iron boron permanent magnet, a rectangular non-rare earth ferrite permanent magnet and a trapezoidal non-rare earth ferrite permanent magnet;
the stator core is uniformly provided with a plurality of stator slots along the circumferential direction, a stator tooth part is formed between every two adjacent stator slots, and the outer ends of the adjacent stator teeth are connected to form a stator yoke part;
the stator winding is arranged in the stator slot;
the plurality of rotor iron cores are in a fan shape and are uniformly surrounded into a circle along the circumferential direction of the stator iron core;
the rectangular rare earth neodymium iron boron permanent magnet is clamped between two adjacent rotor iron cores;
the rectangular non-rare earth ferrite permanent magnet is arranged below the rectangular rare earth neodymium iron boron permanent magnet along the radial direction of the rotor core;
the trapezoid non-rare earth ferrite permanent magnet is clamped between the two rectangular non-rare earth ferrite permanent magnets.
Further, it is same adjacent between the rotor core rectangle tombarthite neodymium iron boron permanent magnet with rectangle non-rare earth ferrite permanent magnet magnetizes the direction the same, all adopts the tangential to magnetize, follows stator core circumferencial direction is adjacent rectangle tombarthite neodymium iron boron permanent magnet magnetizes the opposite direction, follows stator core circumferencial direction is adjacent rectangle non-rare earth ferrite permanent magnet magnetizes the opposite direction.
Further, the trapezoidal non-rare earth ferrite permanent magnet is magnetized in the radial direction, and the magnetizing directions of the trapezoidal ferrite permanent magnets adjacent to the inner side of the rotor core are opposite.
Further, the stator winding is of a concentrated winding structure.
Furthermore, a plurality of the rectangular non-rare earth ferrite permanent magnets are arranged in a Halbach array structure.
Furthermore, a plurality of the trapezoidal non-rare earth ferrite permanent magnets are arranged in a Halbach array structure.
Further, the side of the rectangular non-rare earth ferrite permanent magnet is the same size as the side of the trapezoidal non-rare earth ferrite permanent magnet.
Further, the rotor core is a structure formed by laminating a plurality of silicon steel sheets.
Furthermore, the positions of the stator mechanism and the rotor mechanism can be interchanged to form the structural form of the outer rotor and the inner stator.
Further, the method comprises the following steps:
step one, uniformly arranging a plurality of stator slots on the stator core along the circumferential direction according to the use condition;
step two, assembling the rotor mechanism, uniformly surrounding a plurality of rotor cores into a circle along the circumferential direction of the stator core, and reserving installation gaps among the rotor cores; the mounting gap is arranged along the radial direction of the rotor core;
thirdly, mounting a plurality of rectangular rare earth neodymium-iron-boron permanent magnets above the mounting gaps; then, the rectangular non-rare earth ferrite permanent magnets with the same quantity as the rectangular rare earth neodymium iron boron permanent magnets are arranged below the mounting gaps and are arranged in a manner of being tightly attached to the bottoms of the rectangular rare earth neodymium iron boron permanent magnets;
filling the trapezoidal non-rare-earth ferrite permanent magnet between the two rectangular non-rare-earth ferrite permanent magnets;
and step five, starting the rotor mechanism, wherein the rotor mechanism generates a changing magnetic field in the stator winding through rotation so as to induce a changing electric potential, and the magnetic flux direction of the stator winding is from top to bottom or from bottom to top along with the difference of the rotation position of the rotor mechanism so as to induce the electric potential which changes periodically.
Through the technical scheme of the invention, the following technical effects can be realized:
the consumption of the rare earth neodymium iron boron permanent magnet can be effectively reduced, the torque density of the motor is improved, and the cost of the motor is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a general schematic diagram of a low cost hybrid magnetic steel permanent magnet motor and method of use thereof in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a rectangular rare earth NdFeB permanent magnet of a low cost hybrid magnet steel permanent magnet machine and method of use thereof in an embodiment of the invention;
FIG. 3 is a schematic structural view of a low-cost hybrid magnetic steel permanent magnet motor and a method of using the same, showing a magnetic flux direction from top to bottom according to an embodiment of the present invention;
FIG. 4 is a schematic view of a low-cost hybrid magnetic steel permanent magnet motor and a method of using the same showing a structure in which the magnetic flux direction is from bottom to top in accordance with an embodiment of the present invention;
reference numerals: 1. stator iron core, 2, stator winding, 3, rotor iron core, 4, rectangle tombarthite neodymium iron boron permanent magnet, 5, rectangle non-rare earth ferrite permanent magnet, 6, trapezoidal non-rare earth ferrite permanent magnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
A low-cost hybrid magnetic steel permanent magnet motor and a method of using the same, as shown in figures 1-4,
the method comprises the following steps:
the stator mechanism comprises a stator iron core 1 and a stator winding 2;
the rotor mechanism is matched with the stator mechanism to form a magnetic field of a closed loop, and comprises a rotor iron core 3, a rectangular rare earth neodymium iron boron permanent magnet 4, a rectangular non-rare earth ferrite permanent magnet 5 and a trapezoidal non-rare earth ferrite permanent magnet 6;
the stator core 1 is uniformly provided with a plurality of stator slots along the circumferential direction, a stator tooth part is formed between every two adjacent stator slots, and the outer ends of the adjacent stator teeth are connected to form a stator yoke part;
the stator winding 2 is arranged in the stator slot;
the plurality of rotor iron cores 3 are in a fan shape and are uniformly surrounded into a circle along the circumferential direction of the stator iron core 1;
the rectangular rare earth neodymium iron boron permanent magnet 4 is clamped between two adjacent rotor iron cores 3;
the rectangular non-rare earth ferrite permanent magnet 5 is arranged below the rectangular rare earth neodymium iron boron permanent magnet 4 along the radial direction of the rotor core 3;
the trapezoidal non-rare earth ferrite permanent magnet 6 is clamped between the two rectangular non-rare earth ferrite permanent magnets 5.
Specifically, the circumferential direction of the stator core 1 in this side designates the circumferential direction itself of the stator core 1 as well as a direction parallel to the other parallel surfaces of the stator core 1.
As a preferred example of the above embodiment, as shown in fig. 1 to 4, the rectangular rare earth neodymium iron boron permanent magnet 4 and the rectangular non-rare earth ferrite permanent magnet 5 between the same adjacent rotor cores 3 have the same magnetizing direction, and are magnetized tangentially, and along the circumferential direction of the stator core 1, the rectangular rare earth neodymium iron boron permanent magnet 4 is adjacent to the circumferential direction of the stator core, and along the circumferential direction of the stator core 1, the rectangular non-rare earth ferrite permanent magnet 5 is adjacent to the circumferential direction of the stator core, and the magnetizing directions are opposite to each other.
As shown in fig. 1 to 4, in the above embodiment, preferably, the trapezoidal non-rare-earth ferrite permanent magnet 6 is magnetized in a radial direction, and the magnetizing directions of the trapezoidal ferrite permanent magnets 6 adjacent to the inner side of the rotor core 3 are opposite.
As shown in fig. 1 to 4, the stator winding 2 preferably has a concentrated winding structure.
As a preferred example of the above embodiment, as shown in fig. 1 to 4, a plurality of the rectangular non-rare earth ferrite permanent magnets 5 are arranged in a Halbach array structure.
As a preferred example of the above embodiment, as shown in fig. 1 to 4, a plurality of the trapezoidal non-rare earth ferrite permanent magnets 6 are arranged in a Halbach array structure.
Specifically, the Halbach array arrangement mode is adopted, so that the use amounts of the rectangular non-rare earth ferrite permanent magnet 5 and the trapezoidal non-rare earth ferrite permanent magnet 6 are reduced, and the motor cost is reduced; the rectangular non-rare earth ferrite permanent magnet 5, the trapezoidal non-rare earth ferrite permanent magnet 6 and the tangentially magnetized rectangular rare earth neodymium iron boron permanent magnet 4 form a parallel magnetic circuit, so that the air gap flux density is improved, and the torque density of the motor is improved.
As a preferable example of the above embodiment, as shown in fig. 1 to 4, the side of the rectangular non-rare earth ferrite permanent magnet 5 is the same size as the side of the trapezoidal non-rare earth ferrite permanent magnet 6.
As shown in fig. 1 to 4, the rotor core 3 is preferably formed by laminating a plurality of silicon steel sheets.
As shown in fig. 1 to 4, the stator mechanism and the rotor mechanism may be interchanged in position to form an outer rotor or an inner stator.
As shown in fig. 1 to 4, the method preferably includes the following steps:
step one, uniformly forming a plurality of stator slots on the stator core 1 along the circumferential direction according to the use condition;
step two, assembling the rotor mechanism, uniformly surrounding a plurality of rotor cores 3 into a circle along the circumferential direction of the stator core 1, and leaving mounting gaps among the rotor cores 3; the mounting gap is provided along a radial direction of the rotor core 3;
thirdly, mounting a plurality of rectangular rare earth neodymium-iron-boron permanent magnets 4 above the mounting gaps; then, the rectangular non-rare earth ferrite permanent magnets 5 with the same number as the rectangular rare earth neodymium iron boron permanent magnets 4 are arranged below the mounting gaps and tightly attached to the bottom of the rectangular rare earth neodymium iron boron permanent magnets 4;
filling the trapezoidal non-rare earth ferrite permanent magnet 6 between the two rectangular non-rare earth ferrite permanent magnets 5;
and step five, starting the rotor mechanism, wherein the rotor mechanism generates a changing magnetic field in the stator winding 2 through rotation so as to induce a changing electric potential, and the magnetic flux direction of the stator winding 2 is from top to bottom or from bottom to top along with the difference of the rotation position of the rotor mechanism so as to induce a periodically changing electric potential.
Particularly, the use method is beneficial to rapidly finishing the installation of the rotor, and improves the use efficiency. Meanwhile, through the matching of the rotor mechanism and the stator mechanism, the electric potential which changes periodically is induced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A low-cost hybrid magnetic steel permanent magnet motor, comprising:
the stator mechanism comprises a stator iron core (1) and a stator winding (2);
the rotor mechanism is matched with the stator mechanism to form a magnetic field of a closed loop and comprises a rotor iron core (3), a rectangular rare earth neodymium iron boron permanent magnet (4), a rectangular non-rare earth ferrite permanent magnet (5) and a trapezoidal non-rare earth ferrite permanent magnet (6);
the stator core (1) is uniformly provided with a plurality of stator slots along the circumferential direction, a stator tooth part is formed between every two adjacent stator slots, and the outer ends of the adjacent stator teeth are connected to form a stator yoke part;
the stator winding (2) is arranged in the stator slot;
the rotor iron cores (3) are in a fan shape and uniformly surround into a circle along the circumferential direction of the stator iron core (1);
the rectangular rare earth neodymium iron boron permanent magnet (4) is clamped between two adjacent rotor iron cores (3);
the rectangular non-rare earth ferrite permanent magnet (5) is arranged below the rectangular rare earth neodymium iron boron permanent magnet (4) along the radial direction of the rotor core (3);
the trapezoid non-rare earth ferrite permanent magnet (6) is clamped between the two rectangular non-rare earth ferrite permanent magnets (5).
2. The low-cost hybrid magnetic steel permanent magnet motor according to claim 1, wherein the rectangular rare earth neodymium iron boron permanent magnet (4) and the rectangular non-rare earth ferrite permanent magnet (5) between the same adjacent rotor cores (3) have the same magnetizing direction, are magnetized tangentially, and have opposite magnetizing directions along the rectangular rare earth neodymium iron boron permanent magnet (4) adjacent to the circumferential direction of the stator core (1) and opposite magnetizing directions along the rectangular non-rare earth ferrite permanent magnet (5) adjacent to the circumferential direction of the stator core (1).
3. The low-cost hybrid alnico permanent magnet machine of claim 1, wherein said trapezoidal non-rare earth ferrite permanent magnets (6) are radially magnetized, and the magnetization directions of said trapezoidal ferrite permanent magnets (6) adjacent to the inside of said rotor core (3) are opposite.
4. A low cost hybrid magnetic steel permanent magnet machine according to claim 1, wherein the stator winding (2) is of concentrated winding construction.
5. The low cost hybrid magnetic steel permanent magnet machine according to claim 1, wherein a plurality of said rectangular non-rare earth ferrite permanent magnets (5) are arranged in a Halbach array configuration.
6. The low cost hybrid magnet steel permanent magnet machine according to claim 1, wherein a plurality of said trapezoidal non-rare earth ferrite permanent magnets (6) are arranged in a Halbach array configuration.
7. The low cost hybrid alnico permanent magnet machine of claim 1, wherein the sides of the rectangular non-rare earth ferrite permanent magnets (5) are the same size as the sides of the trapezoidal non-rare earth ferrite permanent magnets (6).
8. A low cost hybrid alnico permanent magnet machine according to claim 1, wherein said rotor core (3) is a laminated structure of several silicon steel sheets.
9. The low-cost hybrid alnico permanent magnet machine of claim 1, wherein the stator mechanism and the rotor mechanism are interchangeable in position to form an outer rotor and an inner stator.
10. The method of using a low cost hybrid magnetic steel permanent magnet machine according to claim 1, comprising the steps of:
step one, uniformly arranging a plurality of stator slots on the stator core (1) along the circumferential direction according to the use condition;
step two, assembling the rotor mechanism, uniformly surrounding a plurality of rotor cores (3) into a circle along the circumferential direction of the stator core (1), and reserving installation gaps among the rotor cores (3); the mounting gap is arranged along the radial direction of the rotor core (3);
thirdly, mounting a plurality of rectangular rare earth neodymium iron boron permanent magnets (4) above the mounting gaps; then, the rectangular non-rare earth ferrite permanent magnets (5) with the same number as the rectangular rare earth neodymium iron boron permanent magnets (4) are arranged below the mounting gaps and tightly attached to the bottom of the rectangular rare earth neodymium iron boron permanent magnets (4);
filling the trapezoidal non-rare-earth ferrite permanent magnet (6) between the two rectangular non-rare-earth ferrite permanent magnets (5);
and step five, starting the rotor mechanism, wherein the rotor mechanism generates a changing magnetic field in the stator winding (2) through rotation so as to induce a changing potential, and the stator winding (2) induces a periodically changing potential from top to bottom or from bottom to top along with the difference of the rotation position of the rotor mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394844.9A CN113381525A (en) | 2021-04-13 | 2021-04-13 | Low-cost hybrid magnetic steel permanent magnet motor and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394844.9A CN113381525A (en) | 2021-04-13 | 2021-04-13 | Low-cost hybrid magnetic steel permanent magnet motor and use method thereof |
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| CN113381525A true CN113381525A (en) | 2021-09-10 |
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| CN202110394844.9A Pending CN113381525A (en) | 2021-04-13 | 2021-04-13 | Low-cost hybrid magnetic steel permanent magnet motor and use method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101946386A (en) * | 2008-02-21 | 2011-01-12 | 株式会社东芝 | The assemble method of permanent magnet rotary electric machine, permanent magnet rotary electric machine, the decomposition method of permanent magnet rotary electric machine and permanent magnet motor drive system |
| CN104704711A (en) * | 2012-03-13 | 2015-06-10 | 博泽沃尔兹堡汽车零部件有限公司 | Electrical machine with a high level of efficiency |
| CN105322744A (en) * | 2015-11-09 | 2016-02-10 | 江苏大学 | Split type combined permanent magnet brushless motor for electric vehicle |
| CN106911237A (en) * | 2017-04-20 | 2017-06-30 | 扬州大学 | A kind of many excitation source bimorph transducer magnetic flux switching memory electrical machines of few terres rares |
-
2021
- 2021-04-13 CN CN202110394844.9A patent/CN113381525A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101946386A (en) * | 2008-02-21 | 2011-01-12 | 株式会社东芝 | The assemble method of permanent magnet rotary electric machine, permanent magnet rotary electric machine, the decomposition method of permanent magnet rotary electric machine and permanent magnet motor drive system |
| CN104704711A (en) * | 2012-03-13 | 2015-06-10 | 博泽沃尔兹堡汽车零部件有限公司 | Electrical machine with a high level of efficiency |
| CN105322744A (en) * | 2015-11-09 | 2016-02-10 | 江苏大学 | Split type combined permanent magnet brushless motor for electric vehicle |
| CN106911237A (en) * | 2017-04-20 | 2017-06-30 | 扬州大学 | A kind of many excitation source bimorph transducer magnetic flux switching memory electrical machines of few terres rares |
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Application publication date: 20210910 |
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