CN110492708B - Laminated vernier motor - Google Patents
Laminated vernier motor Download PDFInfo
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- CN110492708B CN110492708B CN201910775241.6A CN201910775241A CN110492708B CN 110492708 B CN110492708 B CN 110492708B CN 201910775241 A CN201910775241 A CN 201910775241A CN 110492708 B CN110492708 B CN 110492708B
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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
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- 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
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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Abstract
The invention provides a laminated vernier motor which comprises a stator module and a rotor module matched with the stator module, wherein the stator module comprises two end stators which are arranged at intervals and oppositely and a middle stator which is arranged between the two end stators, and the two end stators are respectively staggered with the middle stator by half slot pitch angle in the circumferential direction; the rotor module comprises two rotors respectively arranged between the middle stator and the two end stators and a plurality of pairs of permanent magnets respectively arranged on the rotors. The laminated vernier motor is characterized in that the end part stator, the rotor, the middle part stator, the rotor and the end part stator are coaxially arranged in sequence along the axial direction to form an axial magnetic field double-rotor laminated permanent magnet motor structure, and the plurality of magnetic flux modulation poles which are arranged on the middle part stator in a spoke type and equal interval mode can change a magnetic field loop by changing the relative position of the two rotors, so that the efficient utilization of magnetic flux is facilitated, the torque density of the permanent magnet motor is improved, and the volume of the permanent magnet motor is reduced.
Description
Technical Field
The invention belongs to the technical field of permanent magnet motors, and particularly relates to a laminated vernier motor.
Background
The Vernier motor (Vernier motor) is a low-speed large-torque direct drive type motor, and has wide application prospects in new energy fields such as electric vehicles, wind power generation, sea wave power generation and the like. The vernier motor effectively modulates the stator armature winding magnetic field and the rotor permanent magnet magnetic field through the tooth slot structure on the stator, so that the vernier motor can well run at low speed and high torque under the condition of more stator armature winding poles and slots. However, the plurality of permanent magnets are usually arranged on the rotor in a single magnetization direction, the generated magnetic field is often difficult to sufficiently act on the end of the motor stator winding, and the magnetic circuit formed by two adjacent permanent magnets has large magnetic resistance and serious magnetic leakage, so that the magnetic flux utilization rate of the permanent magnets is low, the torque density of the vernier motor is low, and the permanent magnet vernier motor cannot adapt to the market demand of smaller volume, lighter weight and higher efficiency.
Disclosure of Invention
The invention aims to provide a laminated vernier motor, and aims to solve the problems that the permanent magnet of the vernier motor in the prior art is low in magnetic flux utilization rate and low in torque density.
In order to achieve the above object, the present invention provides a laminated vernier motor, which includes a stator module and a rotor module matched with the stator module, wherein the stator module includes two end stators and a middle stator, the two end stators are spaced and oppositely disposed, the middle stator is disposed between the two end stators, and a first tooth space structure for winding a stator winding is disposed on an inner end surface of each end stator; the middle stator comprises a plurality of magnetic flux modulation poles which are arranged in a spoke type equidistant mode, the magnetic flux modulation poles form a second tooth groove structure corresponding to the first tooth groove structure, and the two end stators are circumferentially staggered with the middle stator by half of a groove pitch angle respectively; the rotor module comprises two rotors respectively arranged between the middle stator and the two end stators and a plurality of pairs of permanent magnets respectively arranged on the rotors, and the two end stators, the middle stator and the two rotors are coaxially arranged.
Further, the two rotors are circumferentially staggered by 180 ° potential angle.
Furthermore, the middle stator further comprises a connecting ring connected with the plurality of magnetic flux modulation poles, two ends of each magnetic flux modulation pole respectively protrude out of two axial ends of the connecting ring, and each magnetic flux modulation pole and the connecting ring are integrally formed.
Further, the potential angles of the two rotors are arranged oppositely.
Furthermore, the two rotors are in circular ring structures with the same structure, and the two end stators and the middle stator are both in circular ring structures; the inner diameters of the two end stators and the middle stator are equal, and the outer diameters of the two end stators and the middle stator are equal.
Further, the inner diameter of each rotor is smaller than the inner diameter of the end stator, and the outer diameter of each rotor is larger than the outer diameter of the end stator.
Further, the middle stator axial length is 2 times the end stator axial length.
Furthermore, each first tooth space structure comprises a plurality of first stator teeth arranged on the inner end face of the corresponding end stator, the first stator teeth are distributed at equal intervals along the circumferential direction of the end stator, and a first stator groove is formed between every two adjacent first stator teeth; each second tooth slot structure comprises a plurality of second stator teeth formed by a plurality of magnetic flux modulation poles respectively, a second stator slot is formed between every two adjacent second stator teeth, and the first stator teeth and the second stator teeth are identical in structure.
Further, two adjacent permanent magnets on each rotor are arranged in opposite polarity.
Furthermore, the stator module also comprises a plurality of stator windings respectively wound on the flux modulation poles.
The laminated vernier motor provided by the invention has the beneficial effects that: compared with the prior art, the laminated vernier motor provided by the invention has the advantages that the end part stator, the rotor, the middle part stator, the rotor and the end part stator are coaxially arranged along the axial direction, the inner end surface of each end part stator is provided with the first tooth groove structure wound with the stator winding, the middle part stator is provided with the plurality of magnetic flux modulation poles which are arranged in a spoke type and equal interval manner, the plurality of magnetic flux modulation poles form the second tooth groove structure corresponding to the first tooth groove structure, the two end part stators are respectively staggered with the middle part stator in the circumferential direction by half of the groove pitch angle, so that the axial magnetic field double-rotor laminated permanent magnet motor structure is formed, the magnetic field loop of the permanent magnet motor is changed by changing the relative positions of the two rotors, the efficient utilization of the magnetic flux of the permanent magnet on each rotor is facilitated, the torque density of the permanent magnet motor.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a stacked vernier motor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a middle stator of a laminated vernier motor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a laminated vernier motor according to an embodiment of the present invention, in which a stator winding is wound on a middle stator;
fig. 4 is a schematic perspective view of a stacked vernier motor according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a laminated vernier motor according to a second embodiment of the present invention, in which a stator winding is wound on a middle stator;
fig. 6 is a schematic structural diagram illustrating a first laminated vernier motor according to a second embodiment of the present invention, in which a stator winding is wound on an end stator;
fig. 7 is a second schematic structural view illustrating a stator winding wound on an end stator of a laminated vernier motor according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of a laminated vernier motor according to an embodiment of the present invention, which forms a main magnetic field loop;
fig. 9 is a schematic structural diagram of a laminated vernier motor according to a second embodiment of the present invention, in which two independent magnetic field loops are formed.
Wherein, in the drawings, the reference numerals are mainly as follows:
1-an end stator; 11-a first gullet configuration; 111-a first stator tooth; 112-a first stator slot;
2-a middle stator; 21-a second tooth slot structure; 211-second stator teeth; 212-a second stator slot; 22-a connecting ring;
3-a rotor; 4-a permanent magnet; 5-a flux modulating pole; 6-stator winding.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in 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 "connected" or "disposed" to another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 3, a laminated vernier motor according to an embodiment of the present invention will be described. The laminated vernier motor comprises a stator module and a rotor 3 module matched with the stator module, wherein the stator module comprises two end stators 1 which are arranged at intervals and oppositely and a middle stator 2 arranged between the two end stators 1, and a first tooth groove structure 11 used for winding a stator winding 6 is arranged on the inner end surface of each end stator 1. The middle stator 2 comprises a plurality of magnetic flux modulation poles 5 which are arranged in a spoke type and are arranged at equal intervals, the magnetic flux modulation poles 5 form a second tooth groove structure 21 corresponding to the first tooth groove structure 11, and the second tooth groove structure 21 is used for winding a stator winding 6. First tooth's socket structure 11 is the same with second tooth's socket structure 21, and two tip stators 1 stagger half groove pitch angle with middle part stator 2 circumference respectively, make middle part stator 2's tooth's socket cooperate with two tip stators 1's tooth's socket respectively and constitute a main magnetic field return circuit, magnetic circuit magnetic resistance is little, it is big to have solved the adjacent magnetic pole of traditional vernier motor and constitute magnetic circuit magnetic resistance by stator tooth and groove, has increased substantially the utilization ratio of 4 magnetic fluxes of permanent magnet, improves permanent-magnet machine's torque density. Wherein, the rotor 3 module includes two rotors 3 and sets up a plurality of pairs of permanent magnets 4 on each rotor 3 respectively between middle part stator 2 and two tip stators 1 respectively, and two tip stators 1, middle part stator 2 and two coaxial settings of rotor 3. Specifically, one rotor 3 is located between one end stator 1 and the middle stator 2, the other rotor 3 is located between the other end stator 1 and the middle stator 2, the two rotors 3 rotate coaxially around the central axis and are separated by a radial no-load air gap, which is equivalent to combining two permanent magnet motors into a motor with a dual-rotor 3 driving structure, and the torque density of the permanent magnet motors is improved while the overall size of the motor is reduced.
Preferably, as an embodiment of the laminated vernier motor provided in the present invention, two adjacent permanent magnets 4 on each rotor 3 are arranged with opposite polarities.
In this embodiment, a plurality of pairs of permanent magnets 4 are arranged in a spoke manner along the circumferential direction of the rotor 3 with the corresponding annular structure, two adjacent permanent magnets 4 on the same rotor 3 are arranged with opposite polarities, that is, the magnetic polarities of the sides, facing each other, of the two adjacent permanent magnets 4 are the same, and the magnetic polarities of the sides, facing away from each other, of the two adjacent permanent magnets 4 are the same, so that the laminated permanent magnet motor forms a main magnetic field loop or two independent magnetic field loops, the magnetic resistance of a magnetic circuit is reduced, and the torque density of the permanent magnet motor is. And each permanent magnet 4 penetrates through the corresponding rotor 3, and each rotor 3 can adopt an iron core, so that the magnetic fields generated by the permanent magnets 4 on the two rotors 3 can be fully applied to the end parts of the coils of the stator winding 6, the electromagnetic torque is increased, and the torque density of the permanent magnet motor is improved.
Compared with the prior art, the laminated vernier motor provided by the invention has the advantages that the end part stator 1, the rotor 3, the middle part stator 2, the rotor 3 and the end part stator 1 are coaxially arranged along the axial direction, the inner end surface of each end part stator 1 is provided with the first tooth space structure 11 wound with the stator winding 6, the middle part stator 2 is provided with a plurality of magnetic flux modulation poles 5 which are arranged in a spoke type and equal interval manner to form the second tooth space structure 21 corresponding to the first tooth space structure 11, the two end part stators 1 are respectively staggered with the middle part stator 2 in the circumferential direction by half of the groove pitch angle to form the laminated permanent magnet motor structure of the axial magnetic field double rotor 3, the magnetic field loop of the permanent magnet motor can be changed by changing the relative position of the two rotors 3, the efficient utilization of the magnetic flux of the permanent magnet 4 on each rotor 3 is facilitated, the torque density of the permanent magnet motor is improved, the volume of the permanent magnet motor is reduced, and meanwhile, the fault-tolerant capability of the permanent magnet motor is improved.
Further, referring to fig. 1 and 8 together, as a specific embodiment of the laminated vernier motor provided by the present invention, two rotors 3 are circumferentially staggered by 180 ° potential angle, that is, two rotors 3 with the same structure are circumferentially staggered by half a pole pitch, and the relative position of the two rotors 3 is changed by circumferentially staggering 180 ° potential angle, so that a magnetic field loop of the permanent magnet motor is changed, and under the modulation action of the plurality of magnetic flux modulation poles 5 of the middle stator 2, the permanent magnet motor can better form a magnetic linkage, thereby improving the torque density of the permanent magnet motor.
Further, referring to fig. 3, as an embodiment of the laminated vernier motor according to the present invention, the stator module further includes a plurality of stator windings 6 respectively wound on the magnetic flux modulation poles 5.
Specifically, the middle stator 2 includes a plurality of flux modulation poles 5, the shape of the flux modulation poles 5 is the same as the structural shape of the first stator teeth 111 of the end stator 1, the flux modulation poles 5 are arranged in a spoke-like equidistant manner, the spacing between adjacent flux modulation poles 5 is the same as the spacing between adjacent first stator teeth 111 on the same end stator 1, each flux modulation pole 5 of the middle stator 2 is circumferentially staggered from the corresponding second stator teeth 211 of the end stator 1 by half a slot pitch angle, a plurality of stator coils are respectively wound on the flux modulation poles 5, flux linkages of the permanent magnet motor are penetrated into a whole through each flux modulation pole 5 (see fig. 8), the torque density of the permanent magnet motor is improved, efficient utilization of the flux of the permanent magnet 4 on each rotor 3 is facilitated, the torque density of the permanent magnet motor is improved, and the volume of the permanent magnet motor is reduced. And, the stator winding 6 of the middle stator 2 is controlled by an inverter, the stator winding 6 of the end stator 1 can be controlled by one inverter, or can be controlled by two inverters respectively, so that multi-phase control can be realized.
Referring to fig. 4 and 9, as an embodiment of the laminated vernier motor according to the present invention, the laminated vernier motor includes a stator module and a rotor 3 module matched with the stator module, the stator module includes two end stators 1 arranged at intervals and oppositely and a middle stator 2 arranged between the two end stators 1, and an inner end surface of each end stator 1 is provided with a first tooth space structure 11 for winding a stator winding 6. The middle stator 2 comprises a plurality of magnetic flux modulation poles 5 which are arranged in a spoke type and are arranged at equal intervals, the magnetic flux modulation poles 5 form a second tooth groove structure 21 corresponding to the first tooth groove structure 11, and the second tooth groove structure 21 is used for winding a stator winding 6. The middle stator 2 further includes a connection ring 22 connected to the plurality of flux modulation poles 5, two ends of each flux modulation pole 5 respectively protrude from two axial ends of the connection ring 22, and each flux modulation pole 5 and the connection ring 22 are integrally formed. First tooth's socket structure 11 is the same with second tooth's socket structure 21, and two tip stators 1 stagger half groove pitch angle with middle part stator 2 circumference respectively, make middle part stator 2's tooth's socket cooperate with two tip stators 1's tooth's socket respectively and constitute two independent magnetic field return circuits, magnetic circuit magnetic resistance is little, it is big to have solved the adjacent magnetic pole of traditional vernier motor and constitute magnetic circuit magnetic resistance by stator tooth and groove, has increased substantially the utilization ratio of 4 magnetic fluxes of permanent magnet, improves permanent-magnet machine's torque density. Wherein, the rotor 3 module includes two rotors 3 and sets up a plurality of pairs of permanent magnets 4 on each rotor 3 respectively between middle part stator 2 and two tip stators 1 respectively, and two tip stators 1, middle part stator 2 and two coaxial settings of rotor 3.
Specifically, each second tooth slot structure 21 includes a plurality of second stator teeth 211 formed on an axial corresponding end surface of the connection ring 22, the plurality of second stator teeth 211 are distributed at equal intervals along the circumferential direction of the connection ring 22, a second stator slot 212 is formed between two adjacent second stator teeth 211, and the first stator tooth 111 and the second stator tooth 211 have the same structure. Through coaxially setting up tip stator 1 along the axial in proper order, rotor 3, middle part stator 2, rotor 3 and tip stator 1, and be provided with the first tooth's socket structure 11 of winding stator winding 6 at each tip stator 1 interior terminal surface, the terminal surface at 2 axial both ends of middle part stator is equipped with second tooth's socket structure 21 relative with first tooth's socket structure 11 respectively, first tooth's socket structure 11 is the same with second tooth's socket structure 21, and two tip stators 1 stagger half slot pitch angle with middle part stator 2 circumference respectively, in order to form 3 stromatolite permanent-magnet machine structures of axial magnetic field birotor, the accessible changes the relative position of two rotors 3 and makes permanent-magnet machine magnetic field return circuit change, be favorable to the high-efficient utilization of 4 magnetic fluxes of permanent magnet on each rotor 3, improve permanent-magnet machine's torque density, and reduced permanent-magnet machine's volume, strengthen permanent-magnet.
Further, referring to fig. 4, as an embodiment of the laminated vernier motor according to the present invention, two rotors 3 are coaxially and parallel placed, and the permanent magnets 4 at corresponding positions on the two rotors 3 are aligned along the axial direction of the rotors 3. Specifically, two rotors 3 are ring-shaped structures, two rotors 3 are coaxially arranged on two sides of a middle stator 2 respectively and are located between an end stator 1 and the middle stator 2 respectively, a plurality of pairs of permanent magnets 4 are arranged in a spoke manner along the circumferential direction of the rotors 3, two adjacent permanent magnets 4 on the same rotor 3 are arranged in opposite polarity, and two adjacent permanent magnets 4 on different rotors 3 are arranged in an aligned manner along the axial direction of the rotors 3, so that the laminated permanent magnet motor can well form two independent magnetic field loops (see fig. 9), magnetic circuit reluctance is reduced, and torque density of the permanent magnet motor is improved.
Further, referring to fig. 4, as an embodiment of the laminated vernier motor according to the present invention, the potential angles of the two rotors 3 are oppositely disposed, so that the potential angles of the two rotors 3 are different by 0 °. Specifically, the positions of two rotors 3 with the same structure are set to be completely consistent, so that the two rotors 3 are coaxial and parallel axial mirror structures, the permanent magnet motor can well form two independent magnetic field loops, the magnetic resistance of a magnetic circuit is reduced, and the torque density of the permanent magnet motor is improved.
Further, referring to fig. 1 and fig. 4 together, as a specific embodiment of the laminated vernier motor according to the present invention, the two rotors 3 are circular ring structures with the same structure, and the two end stators 1 and the middle stator 2 are both circular ring structures; the inner diameters of the two end stators 1 and the middle stator 2 are equal, and the outer diameters of the two end stators 1 and the middle stator 2 are equal, so that the overall size of the motor is reduced, and the modularization of the permanent magnet motor part production is realized.
Further, referring to fig. 1 and fig. 4 together, as an embodiment of the laminated vernier motor according to the present invention, the inner diameter of each rotor 3 is smaller than the inner diameter of the end stator 1, and the outer diameter of each rotor 3 is larger than the outer diameter of the end stator 1, so that the magnetic field generated by the permanent magnet 4 at the radial extension position of each rotor 3 is more fully applied to the end of the coil of the stator winding 6 by the design of the radial length extension of each rotor 3, thereby increasing the electromagnetic torque and increasing the torque density of the permanent magnet motor.
Further, referring to fig. 4, as a specific embodiment of the laminated vernier motor according to the present invention, the axial length of the middle stator 2 is 2 times the axial length of the end stator 1, so that the permanent magnet motor can form two stable independent magnetic field loops with a certain magnetic field strength, thereby increasing the torque density of the permanent magnet motor, avoiding interference between the two independent magnetic field loops, and enhancing the working stability of the permanent magnet motor.
Further, referring to fig. 4, as a specific embodiment of the laminated vernier motor provided in the present invention, each first tooth slot structure 11 includes a plurality of first stator teeth 111 disposed on an inner end surface of the corresponding end stator 1, the plurality of first stator teeth 111 are distributed at equal intervals along a circumferential direction of the end stator 1, and a first stator slot 112 is formed between two adjacent first stator teeth 111; each second slot structure 21 includes a plurality of second stator teeth 211 formed by the plurality of flux modulation poles 5, respectively, a second stator slot 212 is formed between two adjacent second stator teeth 211, and the first stator tooth 111 and the second stator teeth 211 have the same structure.
Specifically, referring to fig. 6, each end stator 1 is a circular ring structure, a plurality of first stator teeth 111 are uniformly arranged on an inner end surface of each end stator 1 along a circumferential direction, a first stator slot 112 is formed between adjacent first stator teeth 111 along an axial direction, and coils of a plurality of stator windings 6 are correspondingly wound on the corresponding first stator teeth 111. In addition, referring to fig. 7, the inner bottom surface of each first stator slot 112 and the outer end surface of the corresponding end stator 1 form a stator yoke, and the coils of the plurality of stator windings 6 can be correspondingly wound on the corresponding stator yokes, so that the coils of the stator windings 6 are firmer and are not easy to fall off. Middle part stator 2 also designs into the ring shape structure with tip stator 1 isotructure, the tooth's socket with two tip stator 1 isotructures is seted up respectively to the terminal surface at 2 axial both ends of middle part stator, the terminal surface at 2 axial both ends of middle part stator respectively evenly is provided with a plurality of second stator teeth 211 along circumference, form second stator groove 212 along the axial is inwards gone between the adjacent second stator tooth 211, second stator tooth 211 is the same with first stator tooth 111's structure, second stator groove 212 is the same with first stator groove 112's structure, and first tooth's socket structure 11 has the same stator number of teeth and stator slot number with second tooth's socket structure 21. The coils of the plurality of stator windings 6 may be respectively wound on the corresponding second stator teeth 211. Specifically, the stator winding 6 may employ a single-phase or multi-phase winding. The stator windings 6 of the two end stators 1 and the middle stator 2 may be controlled in series by one inverter or may be controlled individually, so that multiphase control is realized.
Further, referring to fig. 5, as an embodiment of the laminated vernier motor according to the present invention, the plurality of second stator teeth 211 on the end surface of one axial end of the middle stator 2 are respectively aligned with the plurality of second stator teeth 211 on the end surface of the other axial end of the middle stator 2 along the axial direction of the middle stator 2.
Specifically, adjacent second stator tooth 211 on the terminal surface of middle part stator 2 axial both ends is along middle part stator 2 axial alignment, thereby make adjacent second stator slot 212 on the terminal surface of middle part stator 2 axial both ends also along middle part stator 2 axial alignment, so that with the position of stator coil winding between two adjacent second stator slot 212, conveniently wind on middle part stator 2 and establish stator winding 6, and make stator winding 6's coil more firm, be difficult to drop, improve the reliable and stable nature of permanent magnet motor work.
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 (7)
1. A laminated vernier motor characterized in that: the stator module comprises two end stators which are arranged at intervals and oppositely and a middle stator which is arranged between the two end stators, and a first tooth groove structure for winding a stator winding is arranged on the inner end surface of each end stator; the middle stator comprises a plurality of magnetic flux modulation poles which are arranged at equal intervals, the magnetic flux modulation poles form a second tooth groove structure corresponding to the first tooth groove structure, and the two end stators are circumferentially staggered with the middle stator by half of a groove pitch angle respectively; the rotor module comprises two rotors respectively arranged between the middle stator and the two end stators and a plurality of pairs of permanent magnets respectively arranged on the rotors, and the two end stators, the middle stator and the two rotors are coaxially arranged; the two rotors are in annular structures with the same structure, two adjacent permanent magnets on the same rotor are arranged in opposite polarity, and the permanent magnet on one rotor is aligned with the permanent magnet on the other rotor at the corresponding position along the axial direction of the rotors; the two rotors are staggered by 180-degree potential angles in the circumferential direction; each first tooth groove structure comprises a plurality of first stator teeth arranged on the inner end face of the corresponding end stator, the first stator teeth are distributed at equal intervals along the circumferential direction of the end stator, and a first stator groove is formed between every two adjacent first stator teeth; each second tooth slot structure comprises a plurality of second stator teeth formed by a plurality of magnetic flux modulation poles respectively, a second stator slot is formed between every two adjacent second stator teeth, and the first stator teeth and the second stator teeth are identical in structure.
2. The laminated vernier motor as claimed in claim 1, wherein: the middle stator further comprises a connecting ring connected with the plurality of magnetic flux modulation poles, two ends of each magnetic flux modulation pole respectively protrude out of two axial ends of the connecting ring, and each magnetic flux modulation pole and the connecting ring are integrally formed.
3. The laminated vernier motor as claimed in claim 2, wherein: the potential angles of the two rotors are arranged oppositely.
4. The laminated vernier motor as claimed in claim 2, wherein: the two end stators and the middle stator are both in circular ring structures; the inner diameters of the two end stators and the middle stator are equal, and the outer diameters of the two end stators and the middle stator are equal.
5. The laminated vernier motor as claimed in claim 4, wherein: the inner diameter of each rotor is smaller than the inner diameter of the end stator, and the outer diameter of each rotor is larger than the outer diameter of the end stator.
6. The laminated vernier motor as claimed in claim 4, wherein: the axial length of the middle stator is 2 times of the axial length of the end stators.
7. The laminated vernier motor as claimed in any one of claims 1 to 6, wherein: the stator module also comprises a plurality of stator windings respectively wound on the magnetic flux modulation poles.
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| CN112688517B (en) * | 2020-12-29 | 2021-11-02 | 福州大学 | Mixed excitation axial magnetic field permanent magnet motor |
| CN112688519B (en) * | 2020-12-29 | 2021-11-30 | 福州大学 | Stator permanent magnet type axial magnetic field permanent magnet motor |
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| CN103178667A (en) * | 2013-03-06 | 2013-06-26 | 华中科技大学 | Axial-magnetic-field double-stator vernier motor |
| CN107873118A (en) * | 2015-06-10 | 2018-04-03 | 软件电机公司 | The mirror image of high rotor magnetic pole switched reluctance machines |
| CN107979255A (en) * | 2016-10-24 | 2018-05-01 | 南京理工大学 | A kind of Double-stator axial magnetic flow switched reluctance machines of big torque low pulse |
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