CN110061602B - Rotor structure and permanent magnet excitation motor - Google Patents

Rotor structure and permanent magnet excitation motor Download PDF

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Publication number
CN110061602B
CN110061602B CN201811597992.5A CN201811597992A CN110061602B CN 110061602 B CN110061602 B CN 110061602B CN 201811597992 A CN201811597992 A CN 201811597992A CN 110061602 B CN110061602 B CN 110061602B
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rotor
permanent magnet
teeth
stator
yoke
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CN110061602A (en
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蹇林旎
石玉君
邓正兴
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Southwest University of Science and Technology
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Southwest University of Science and Technology
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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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • 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
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Abstract

The invention belongs to the technical field of motor manufacturing, and discloses a rotor structure and a permanent magnet excitation motor. The rotor structure comprises a rotor yoke, a plurality of first rotor teeth and a plurality of second rotor teeth which are distributed on the rotor yoke in an annular array in an alternating mode, first rotor permanent magnets are arranged between the adjacent first rotor teeth and the adjacent second rotor teeth, and second rotor permanent magnets are arranged on the second rotor teeth. Like this, replaced the quantity of part permanent magnet through the second rotor tooth, reduced the quantity of permanent magnet, improved the ratio density of rotor tooth and permanent magnet under the unit volume, and then improved the utilization ratio of permanent magnet, in addition, can realize gathering the magnetic effect through the first rotor permanent magnet of the relative both sides of second rotor tooth, improved the magnetic load of motor greatly for the output torque of unit magnet volume obtains great promotion.

Description

Rotor structure and permanent magnet excitation motor
Technical Field
The invention belongs to the technical field of motor manufacturing, and particularly relates to a rotor structure and a permanent magnet excitation motor.
Background
With the increasing prominence of the problems of energy crisis, global warming and the like, the human society faces a serious challenge. Production, traffic electrification and utilization of new energy sources become inevitable choices. The motor is used as a key device for electromechanical energy conversion, and the energy utilization efficiency is directly influenced by the quality of the overall performance of the motor. With the development of permanent magnet materials, the permanent magnet motor technology has been widely applied in the fields of electric vehicles, industrial transmission, wind power generation and the like.
The permanent magnet motor comprises a stator structure and a rotor structure, the existing rotor structure is formed by rotor teeth and permanent magnets which are distributed on a rotor core in an annular array in an alternating mode, namely the permanent magnets are arranged between two adjacent rotor teeth, and the rotor structure has the problems that the utilization rate of the permanent magnets is low and the volume output torque of the unit magnet is small in the using process.
Disclosure of Invention
The invention aims to provide a rotor structure, and aims to solve the technical problems of low permanent magnet utilization rate and small unit magnet volume output torque of the conventional rotor structure of a permanent magnet motor.
In order to achieve the purpose, the invention adopts the technical scheme that: the rotor structure, the rotor structure still including be annular array distribute in turn in a plurality of first rotor teeth and a plurality of second rotor teeth on the rotor yoke, adjacent first rotor teeth with be equipped with the first rotor permanent magnet that is used for magnetizing between the second rotor tooth, the second rotor groove has been seted up on the second rotor tooth, be equipped with second rotor permanent magnet in the second rotor groove.
Further, in the rotor yoke radial direction: the length of each first rotor tooth is equal to the sum of the lengths of each second rotor tooth and each second rotor permanent magnet.
Furthermore, a plurality of positioning structures for guiding the first rotor permanent magnets to be correspondingly arranged in the first rotor grooves one by one and positioning are arranged on the rotor yoke.
Furthermore, the positioning structure is a positioning hole formed in the rotor yoke, and each positioning hole corresponds to one end, close to the rotor yoke, of each first rotor permanent magnet one by one.
Furthermore, the rotor yoke is further provided with a conducting structure for guiding the magnetic lines of force generated by the two first rotor permanent magnets on the two opposite sides of the second rotor tooth to be far away from the rotor yoke in one side direction.
Further, the conducting structure is a plurality of conducting grooves formed in the rotor yoke, and each conducting groove corresponds to one side of each second rotor tooth.
Furthermore, each first rotor tooth is also provided with a bulge for fixing the first rotor permanent magnets positioned at two opposite sides of each first rotor tooth.
The invention also provides a permanent magnet excitation motor which comprises a stator structure and a rotor structure arranged in the stator structure, wherein the rotor structure is the rotor structure.
Furthermore, the stator structure comprises a stator yoke, a plurality of stator teeth and a plurality of armature windings, wherein the stator teeth and the armature windings are distributed on the stator yoke in an annular array in an alternating manner, the stator structure further comprises a plurality of stator permanent magnets used for magnetizing the armature windings, and the stator permanent magnets are arranged on one side of the armature windings in a one-to-one correspondence manner.
Further, the number of pole pairs of the armature winding is PwThe number of pole pairs of the stator permanent magnet is ZsThe number of phases of the armature winding is m phases, and the number of pole pairs P of the m phases of the armature winding and the armature windingwAnd the number of pole pairs of the stator permanent magnet is ZsIt should satisfy:
Figure BDA0001921794180000021
among them, L CD (Z)s，Pw) Is ZsAnd PwThe greatest common divisor of (c); k is a positive integer.
The rotor structure provided by the invention has the beneficial effects that: compared with the prior art, the rotor structure of the invention has the advantages that the rotor yoke is provided with a plurality of first rotor teeth and a plurality of second rotor teeth which are alternately distributed in an annular array, first rotor permanent magnets are arranged between each first rotor tooth and each second rotor tooth, second rotor permanent magnets are arranged on each second rotor tooth, therefore, the second rotor permanent magnet, the second rotor tooth and the first rotor permanent magnets on two opposite sides of the second rotor tooth are combined into a whole and positioned between two adjacent first rotor teeth, the proportioning density of the rotor teeth and the permanent magnets in unit volume is improved, the using amount of the permanent magnets is reduced, and then improved the utilization ratio of permanent magnet, in addition, can realize gathering the magnetic effect through the first rotor permanent magnet of the relative both sides of second rotor tooth, improved the magnetic load of motor greatly for the output torque of unit magnet volume obtains great promotion.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the embodiments or the drawings needed to be practical in the prior art description, and obviously, the drawings in the following description are only some embodiments of the embodiments, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rotor according to an embodiment of the present invention;
FIG. 2 is a schematic view of another rotor structure according to an embodiment of the present invention;
FIG. 3 is an enlarged view of A in FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a length comparison of first and second rotor teeth and second rotor permanent magnets according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a permanent magnet excited motor according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a rotor structure; 11-rotor yoke; 12-a first rotor tooth; 13-second rotor teeth; 14-a first rotor permanent magnet; 15-a second rotor permanent magnet; 16-a positioning structure; 17-conducting structure; 18-a bump;
2-a stator structure; 21-a stator yoke; 22-armature winding; 23-stator slots; 24-stator permanent magnets; 25-stator teeth.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting, and the implementation of the present invention will be described in detail with reference to the specific embodiments below.
As shown in fig. 1 to 5, the present embodiment provides a rotor structure 1, which includes a rotor yoke 11, wherein a plurality of first rotor teeth 12 and a plurality of second rotor teeth 13 are disposed on the rotor yoke 11, each first rotor tooth 12 and each second rotor tooth 13 are alternately disposed on the rotor yoke 11 in an annular array, a first rotor permanent magnet 14 is disposed between adjacent first rotor teeth 12 and second rotor teeth 13, and a second rotor permanent magnet 15 is disposed on each second rotor tooth 13. In this embodiment, the second rotor permanent magnet 15, the first rotor teeth 12, the first rotor permanent magnets 14 on the two opposite sides of the second rotor teeth 13 are combined into a whole to be arranged between the two adjacent first rotor teeth 12, namely, the second rotor teeth 13 replace the part of the using amount of the partial permanent magnet, the using amount of the permanent magnet is reduced, the proportioning density of the rotor teeth and the permanent magnet in unit volume is improved, and further the utilization rate of the permanent magnet is improved, in addition, the magnetic gathering effect can be realized through the first rotor permanent magnets 14 on the two opposite sides of the second rotor teeth 13, the magnetic load of the motor is greatly improved, and the output torque of the unit magnet volume is greatly improved.
Preferably, in this embodiment, a first rotor slot (not shown in the drawings) is formed between adjacent first rotor teeth 12 and adjacent second rotor teeth 13, the first rotor permanent magnet 14 is disposed in the first rotor slot, a second rotor slot (not shown in the drawings) is formed on the second rotor teeth 13, and the second rotor permanent magnet 15 is disposed in the second rotor slot.
Preferably, in the present embodiment, the second rotor slot is opened at an end of the second rotor tooth 13 away from the rotor yoke 11.
Preferably, the first rotor permanent magnet 14 is glued, i.e. glue is applied on the first rotor permanent magnet 14 and then placed in the first rotor slot, and the second rotor permanent magnet 15 is also glued, and the second rotor permanent magnet 15 is installed in the second rotor slot. Through some glue modes, can be fast conveniently with first rotor permanent magnet 14 and second rotor permanent magnet 15 corresponding installation in first rotor groove and second rotor groove. Of course, in this embodiment, the first rotor permanent magnet 14 and the second rotor permanent magnet 15 may be installed in the first rotor slot and the second rotor slot by other methods, which is not limited herein.
Preferably, the second rotor slot is formed in a dovetail shape, so that the second rotor permanent magnet 15 can be preferably fixed to the second rotor slot. Of course, the second rotor slot may have other shapes, and is not limited herein.
Further, referring to fig. 1 and 4, as an embodiment of the rotor structure provided by the present invention, the length of each first rotor tooth 12 along the radial direction of the rotor yoke 11 is equal to the sum of the lengths of each second rotor tooth 13 and the second rotor permanent magnet 15. Through setting up like this for rotor structure 1 is comparatively regular, is convenient for process and subsequent installation. Of course, in the present embodiment, the length of the first rotor tooth 12 may also be greater than or less than the sum of the lengths of the second rotor tooth 13 and the second rotor permanent magnet 15, which is not limited herein, according to the actual situation and the specific requirement.
Further, referring to fig. 1, as an embodiment of the rotor structure provided by the present invention, a plurality of positioning structures 16 are further disposed on the rotor yoke 11. Each positioning structure 16 may guide the first rotor permanent magnet 14 to fill the first rotor slot. Preferably, in the present embodiment, the positioning structures 16 are positioning holes opened on the rotor yoke 11, and each positioning hole corresponds to one end of each first rotor permanent magnet 14 close to the rotor yoke 11. Like this, through setting up the locating hole, can be used to guide and fix a position above-mentioned first rotor permanent magnet 14 and fill in first rotor groove, through locating the one end that first rotor permanent magnet 14 is close to rotor yoke 11 with the locating hole, avoided first rotor permanent magnet 14 to be close and form "short circuit" return circuit near the closed one end magnetic line of rotor yoke 11, improved the effect of gathering magnetism for the output torque of unit magnet volume obtains great promotion. Of course, the positioning structure 16 may also be configured as a limiting block or other structures, and is not limited herein.
Preferably, the positioning holes are arranged in a triangular shape, but in this embodiment, the positioning holes may also be arranged in a circular shape, a diamond shape, a rectangular shape, and the like, which is not limited herein.
Further, referring to fig. 1, as a specific embodiment of the rotor structure provided by the present invention, the rotor yoke 11 is further provided with a conducting structure 17, so that by providing the conducting structure 17, magnetic lines of force generated by the first rotor permanent magnets 14 magnetized oppositely on two adjacent sides of each second rotor tooth 13 are forced to be guided to a side far from the rotor yoke 11 through the second rotor teeth 13 and the second rotor permanent magnets 15 magnetized radially, thereby improving the magnetic concentration effect. Preferably, in this embodiment, the conducting structure 17 is a conducting groove opened in the rotor yoke 11, and each conducting groove corresponds to one side of the second rotor tooth 13 close to the rotor yoke 11. In this way, by forming the conduction groove, the short circuit of the magnetic force lines generated by the first rotor permanent magnet 14 through the rotor yoke 11 is avoided, and the magnetic concentration effect is enhanced.
Preferably, the conduction groove is U-shaped, further, the second rotor permanent magnet 15 and the first rotor permanent magnet 14 on two opposite sides of the second rotor tooth 13 are combined to be U-shaped, the second rotor magnet 15 is magnetized along the radial direction, the first rotor permanent magnet 14 on two opposite sides of the second rotor tooth 13 is magnetized relatively, so that a conduction structure 17 is arranged on the rotor yoke, thereby preventing the magnetic field of the first rotor permanent magnet 14 from forming a "short circuit" loop through the rotor yoke 11, forcing the magnetic fields of the first rotor permanent magnets 14 on two adjacent sides of the second rotor tooth 13 to pass through the second rotor tooth 13 and the second rotor permanent magnet 15 to move to the side far away from the rotor yoke 11, and thus forming a "magnetic convergence effect". Of course, in this embodiment, the conduction groove may be disposed in a V shape or another shape according to actual conditions and specific requirements, and the first rotor permanent magnet 14 and the second rotor permanent magnet 15 may also be disposed in another shape, which is not limited herein.
Further, referring to fig. 2 and fig. 3, as an embodiment of the rotor structure provided by the present invention, each of the first rotor teeth 12 is further provided with a protrusion 18, specifically, an opening (not shown in the drawings) is formed on the first rotor slot for the protrusion 18 to abut against and cooperate with the first rotor permanent magnet 14. Thus, by providing the protrusions, the first rotor permanent magnets 14 on opposite sides of each first rotor tooth 12 can be fixed. Specifically, in the present embodiment, the protrusions 18 are respectively disposed at two opposite ends of the first rotor tooth 12 on a side away from the rotor yoke 11, so as to respectively abut against the first rotor permanent magnets 14 on two opposite sides of the first rotor tooth 12, so that the first rotor permanent magnets 14 are better fixed in the first rotor slot. Of course, the protrusion 18 may be disposed anywhere else on the first rotor tooth 12, and is not limited herein.
Referring to fig. 5, the present invention further provides a permanent magnet excited motor, where the permanent magnet excited motor includes a stator structure 2, the rotor structure 1 is disposed in the stator structure 2, and the rotor structure 1 is the rotor structure 1, which is not described herein again. In this way, the rotor structure 1 is embedded in the stator structure 2, based on the "bidirectional magnetic field modulation effect", that is, the stator magnetic field and the rotor magnetic field are modulated into rich magnetic field harmonics, and stable energy conversion is realized through the interaction of the magnetic field harmonics.
Further, referring to fig. 5, as a specific embodiment of the rotor structure provided by the present invention, the stator structure 2 includes a stator yoke 21, the stator yoke 21 is provided with stator teeth 25 and armature windings 22, the stator teeth 25 and the armature windings 22 are alternately distributed on the stator yoke 21 in an annular array, in addition, the stator structure 2 further includes a plurality of stator permanent magnets 24, and the stator permanent magnets 24 are correspondingly disposed on one side of the armature windings 22. In this way, the armature winding 22 is facilitated to be magnetized by the stator permanent magnets 24. Preferably, a stator slot 23 is formed between two adjacent stator teeth 25, and the armature winding 22 can be received in the stator slot 23, but the armature winding 22 can be disposed between two stator teeth 25 by other methods, which are not limited herein.
In the present invention, the stator magnetic field is modulated into rich magnetic field harmonics by the first rotor teeth 12, and the rotor magnetic field is modulated into rich magnetic field harmonics by the stator teeth 25, and these harmonics having the same number of pole pairs and the same rotational speed interact with each other to realize stable energy conversion.
In the present invention, for convenience of description, the number of pole pairs of the armature winding 22 is PwThe number of pole pairs of the stator, the number of stator slots, the number of stator permanent magnets and the number of pole pairs of the stator teeth are all set as ZsThe number of the first rotor teeth, the number of the second rotor teeth, and the number of the pole pairs of the rotor magnet formed by combining the two first rotor permanent magnets 14 and the single second rotor permanent magnet 15 are all set to be ZrThe number of pole pairs P of the armature winding 22w24 pole pairs Z of stator permanent magnetssNumber of pole pairs Z of rotor magnetrSatisfy the relationship of Pw＝|Zs-ZrSpecific to the embodiment, Z isr＝10，ZsWhen the result is 12, then Pw2, thus, the rotor permanent magnetic field of 10 pairs of poles is modulated into the harmonic magnetic field of 2 pairs of poles by 12 stator teeth, and at the same time, the stator permanent magnetic field of 12 pairs of poles is modulated into the harmonic magnetic field of 2 pairs of poles by 10 first rotor teeth, at this time, when the armature winding 22 is fed with three-phase symmetrical alternating current with certain frequency, 2 pairs of pole armature magnetic fields generated by armature current interact with 2 pairs of pole harmonic magnetic fields respectively modulated by the stator teeth 25 and the first rotor teeth 12 at the same time to realize stable torque output, and complete energy conversion. For example, when the motor is an electric motor, the injection frequency is 20HZWhen the motor is a generator, the external force drives the rotor to rotate at the speed of 120r/min, and the armature winding sends out the frequency of 20HZThe alternating current of (1).
Preferably, when the armature winding 22 injects the symmetric alternating current, the rotating speed of the rotating magnetic field generated by the armature winding 22 is recorded as ΩwThe rotational speed of the rotor structure 1 is denoted ΩrThe size of (a) satisfies the size relationship of
Figure BDA0001921794180000081
The rotational speed at which the armature winding 22 generates the rotating magnetic field can thus be derived from the rotational speed of the rotor structure 1, but of course the rotational speed of the rotor structure 1 can also be derived from the rotational speed at which the armature winding 22 generates the rotating magnetic field.
Preferably, when the number of phases of the armature winding 22 is m-phase, the number P of pole pairs of the m-phase armature winding 22 and the armature winding 22 is set to be m-phasewAnd the number of pole pairs of the stator permanent magnet 25 is ZsIt should satisfy:
Figure BDA0001921794180000082
among them, L CD (Z)s，Pw) Is ZsAnd PwThe greatest common divisor of (c); k is a positive integer. In this way, when the above relation is satisfied, a guarantee is provided for the energy conversion between the subsequent and the rotor structure 1.
Preferably, the stator yoke 21 and the stator teeth 25 are formed by laminating silicon steel sheets with good magnetic permeability along respective axial directions, and the rotor yoke 11, the first rotor teeth 12 and the second rotor teeth 13 are also formed by laminating silicon steel sheets with good magnetic permeability along respective axial directions.
In the invention, the permanent magnet excitation motor works by utilizing the bidirectional magnetic field modulation effect, namely, the magnetic field harmonic waves generated by the stator structure 2 and the rotor structure 1, and the rotor structure 1 is arranged as the rotor structure 1, so that the rotor structure 1 generates the magnetic gathering effect, the magnetic load of the motor is greatly improved, the torque density of the motor is improved, meanwhile, the output torque of unit magnet volume is obviously improved, the consumption of permanent magnets is reduced, and the manufacturing cost of the motor is further reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The rotor structure comprises a rotor yoke and is characterized by further comprising a plurality of first rotor teeth and a plurality of second rotor teeth which are distributed on the rotor yoke in an annular array in an alternating mode, first rotor permanent magnets used for magnetizing are arranged between the adjacent first rotor teeth and the adjacent second rotor teeth, second rotor grooves are formed in the second rotor teeth, second rotor permanent magnets are arranged in the second rotor grooves, and the second rotor permanent magnets are located on one sides, far away from the rotor yoke, of the second rotor teeth; the rotor yoke is also provided with a conducting structure, and the conducting structure is used for forcing magnetic lines generated by the first rotor permanent magnets which are oppositely magnetized at two adjacent sides of each second rotor tooth to be guided to one side far away from the rotor yoke through the second rotor teeth and the second rotor permanent magnets which are radially magnetized.
2. The rotor structure of claim 1, wherein in the rotor yoke radial direction: the length of each first rotor tooth is equal to the sum of the lengths of each second rotor tooth and each second rotor permanent magnet.
3. The rotor structure of claim 2, wherein a first rotor slot is formed between adjacent first and second rotor teeth, and the rotor yoke is provided with a plurality of positioning structures for guiding and positioning each first rotor permanent magnet in a one-to-one correspondence with each first rotor slot.
4. The rotor structure according to claim 3, wherein the positioning structure is a positioning hole formed in the rotor yoke, and each positioning hole corresponds to one end of each first rotor permanent magnet close to the rotor yoke.
5. The rotor structure according to claim 4, wherein the conduction structure is a conduction groove opened in the rotor yoke, and each of the conduction grooves corresponds one-to-one to one side of each of the second rotor teeth.
6. A rotor structure according to any one of claims 1 to 5, wherein each of the first rotor teeth is further provided with projections for fixing the first rotor permanent magnets on opposite sides of each of the first rotor teeth.
7. Permanent magnet excited machine comprising a stator structure and a rotor structure built-in said stator structure, characterized in that said rotor structure is a rotor structure according to any of claims 1 to 6.
8. The pm excited machine of claim 7, wherein said stator structure comprises a stator yoke, a plurality of stator teeth and a plurality of armature windings alternately distributed in an annular array on said stator yoke, said stator structure further comprises a plurality of stator permanent magnets for magnetizing each of said armature windings, and each of said stator permanent magnets is disposed on one side of each of said armature windings in a one-to-one correspondence.
9. The pm excited machine of claim 8, wherein said armature winding has a number of pole pairs of PwThe number of pole pairs of the stator permanent magnet is ZsThe number of phases of the armature winding is m phases, and the number of pole pairs P of the m phases of the armature winding and the armature windingwAnd the number of pole pairs of the stator permanent magnet is ZsIt should satisfy:
Figure FDA0002451483230000021
among them, L CD (Z)s，Pw) Is ZsAnd PwThe greatest common divisor of (c); k is a positive integer.
CN201811597992.5A 2018-12-26 2018-12-26 Rotor structure and permanent magnet excitation motor Active CN110061602B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202524195U (en) * 2012-01-09 2012-11-07 美的威灵电机技术（上海）有限公司 Same-polarity type rotor of rotary motor
CN102801237A (en) * 2011-05-26 2012-11-28 三星电子株式会社 Rotor core, module used for rotor core, rotor and motor
CN207977873U (en) * 2018-01-11 2018-10-16 南方科技大学 A kind of magneto

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI119457B (en) * 2006-08-31 2008-11-14 Abb Oy Rotor for a permanently magnetized electric machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102801237A (en) * 2011-05-26 2012-11-28 三星电子株式会社 Rotor core, module used for rotor core, rotor and motor
CN202524195U (en) * 2012-01-09 2012-11-07 美的威灵电机技术（上海）有限公司 Same-polarity type rotor of rotary motor
CN207977873U (en) * 2018-01-11 2018-10-16 南方科技大学 A kind of magneto

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