CN109245468B - Birotor synchronous motor adopting permanent magnet auxiliary cage barrier rotor - Google Patents
Birotor synchronous motor adopting permanent magnet auxiliary cage barrier rotor Download PDFInfo
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- CN109245468B CN109245468B CN201811107045.3A CN201811107045A CN109245468B CN 109245468 B CN109245468 B CN 109245468B CN 201811107045 A CN201811107045 A CN 201811107045A CN 109245468 B CN109245468 B CN 109245468B
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- 230000004888 barrier function Effects 0.000 title claims abstract description 34
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 12
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 230000005389 magnetism Effects 0.000 claims abstract description 6
- 238000003475 lamination Methods 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 3
- 239000010410 layer Substances 0.000 description 60
- 238000010586 diagram Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
- H02K16/025—Machines with one stator and two or more rotors with rotors and moving stators connected in a cascade
-
- 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
- H02K1/246—Variable reluctance rotors
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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
- H02K1/2793—Rotors axially facing stators
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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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- 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
- H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model provides an adopt birotor synchronous machine of supplementary cage barrier rotor of permanent magnetism, mainly includes casing, external rotor, stator, internal rotor and pivot, its characterized in that: the outer rotor is connected with the shell through a dovetail groove, stators with grooves on two sides are arranged between the outer rotor and the inner rotor, three-phase symmetrical stator windings are embedded in the stator grooves, the inner rotor is connected with the rotating shaft through a steel sleeve, the inner rotor is connected with the steel sleeve through the dovetail groove, and the steel sleeve is fixed with the rotating shaft through a positioning pin; the inner rotor main body and the outer rotor main body are both made of magnetic barrier type reluctance rotors formed by axially laminating, and a segmented anisotropic magnetizing permanent magnet with sinusoidal width and magnetizing direction and a short circuit cage bar with unequal width, which is wide in air gap and narrow in rotating shaft, are added at the non-magnetic conductive layer. The novel double-permanent-magnet auxiliary cage-barrier rotor synchronous motor has the remarkable advantages of excellent performance, novel structure, low cost, high mechanical strength, reliable operation, convenience in industrialization and the like.
Description
Technical Field
The invention relates to a double-rotor synchronous motor with a rotor adopting a permanent magnet auxiliary cage barrier structure. Belongs to the field of motors.
Background
The embedded rotor permanent magnet motor made of rare earth materials is widely applied in various fields by virtue of high power density, torque density, high efficiency and wider constant power operation range. However, rare earth permanent magnets are expensive, resources are limited, and the continuous supply of rare earth permanent magnet materials is also a significant problem. The academia and industry are interested in using rare earth-free, rare earth-free permanent magnets and low cost permanent magnet motors, typically ferrite. The research and development of rare earth-less/rare earth-less permanent magnet motors has important theoretical significance and application value.
The synchronous reluctance motor has been developed rapidly in nineties of twentieth century, and has a great application prospect by virtue of the advantages of large salient pole ratio, excellent speed regulation performance, high efficiency, no or only a small amount of cheap permanent magnets, and the like, and is considered as a rare earth/rare earth-free motor with great industrial potential. However, a purely synchronous reluctance motor (rotor without any excitation) requires a large excitation current on the stator side in order to obtain a large electromagnetic torque, resulting in a motor with low efficiency and power factor. In order to solve the problem, researchers have proposed a permanent magnet auxiliary reluctance type synchronous motor, i.e. a permanent magnet is embedded in a rotor magnetic barrier to provide permanent magnet flux, so as to improve the power factor and torque density of the motor. In addition, the introduction of the permanent magnet is helpful for saturation of the rotor connecting bridge, so that the salient pole effect (the difference between the numerical values of the direct axis inductance and the quadrature axis inductance) is improved. In order to obtain a larger salient pole ratio, a rotor of the permanent magnet auxiliary reluctance synchronous motor is generally designed to be of a multi-layer magnetic barrier structure. However, the motor still has the defects of low torque density and power factor, serious magnetic field saturation under high power, high d-q axis inductive coupling degree and the like, and limits the popularization of industrial application. Therefore, the stator and rotor structures of the motor are required to be optimized and improved so as to promote the application and popularization of the motor.
Disclosure of Invention
The invention aims to: the invention provides a double-rotor synchronous motor with a rotor permanent magnet auxiliary cage barrier structure, and aims to provide a novel synchronous reluctance motor structure which not only can save motor effective materials, but also can improve motor power density and increase rotor salient pole ratio, thereby improving motor torque density and excellent steady state and dynamic performance.
The technical scheme is as follows: the invention adopts the following technical scheme:
the utility model provides a supplementary cage barrier rotor synchronous motor of double permanent magnetism, mainly includes casing, external rotor, stator, internal rotor and pivot, its characterized in that: the outer rotor is connected with the shell through a dovetail groove, stators with grooves on two sides are arranged between the outer rotor and the inner rotor, three-phase symmetrical stator windings are embedded in the stator grooves, the inner rotor is connected with the rotating shaft through a steel sleeve, the inner rotor is connected with the steel sleeve through the dovetail groove, and the steel sleeve is fixed with the rotating shaft through a positioning pin; the inner rotor main body and the outer rotor main body are both made of magnetic barrier type reluctance rotors formed by axially laminating, and a segmented anisotropic magnetizing permanent magnet with sinusoidal width and magnetizing direction and a short circuit cage bar with unequal width, which is wide in air gap and narrow in rotating shaft, are added at the non-magnetic conductive layer.
The motor adopts a double-rotor structure, and air gaps are arranged between the outer rotor and the stator as well as between the inner rotor and the stator.
The inner rotor and the outer rotor are formed by lamination sheets formed by axially laminating silicon steel sheet materials.
The lamination is provided with magnetic conduction layers, a non-magnetic conduction layer is reserved between two adjacent magnetic conduction layers, a proper width ratio between the magnetic conduction layers and the non-magnetic conduction layers is selected according to influence on magnetic field modulation capability, and the magnetic conduction layers are connected through connecting ribs to form a whole.
The non-magnetic conductive layer of the permanent magnet auxiliary reluctance rotor adopts a U shape.
Short circuit cage bars with different spans are embedded on two sides of each U-shaped non-magnetic layer.
The short circuit cage bars adopt structures with unequal widths, which are close to the air gap and the rotating shaft, are placed in tangential trapezoidal non-magnetic layers, and the ends of the short circuit cage bars are connected by two conductors with symmetrical permanent magnet auxiliary cage barrier rotor axes to form a plurality of groups of concentric annular loops.
The bottoms of the U-shaped non-magnetic conductive layers are provided with partitioned anisotropic magnetization permanent magnets with sine-changing widths and magnetization directions according to embedding.
The beneficial effects of the invention are as follows:
the motor adopts a double-rotor structure, fully utilizes the effective space of the motor, not only can save the effective material utilization rate of the motor, but also can improve the power density of the motor and reduce the volume of the motor. Meanwhile, on the basis of an axial lamination magnetic barrier structure, an auxiliary permanent magnet and a short circuit cage bar are added to a non-magnetic conductive layer of a rotor of the motor, so that the torque density of the motor is further improved, meanwhile, the harmonic wave and loss of an air gap magnetic field can be effectively reduced, and the steady state and dynamic running performance of the motor are improved; the permanent magnet auxiliary cage barrier rotor silicon steel sheets are laminated along the axial direction, so that eddy current loss in a rotor core can be reduced, and the motor efficiency is improved; the U-shaped magnetic barrier is adopted to increase the air gap on the motor quadrature axis, so that the quadrature axis magnetic resistance is improved, and the direct axis direction is basically unchanged, thereby being beneficial to improving the magnetic resistance torque of the motor; the permanent magnets which are arranged in a blocking and anisotropic magnetizing way and have the sinusoidal variation of the width and magnetizing direction are added at the bottom of the non-magnetic conductive layer, so that the permanent magnetic field close to the air gap is more concentrated, the magnetic flux density distribution of the air gap of the motor is more similar to sinusoidal distribution, the harmonic content is less, the magnetic density distribution is more uniform, the salient pole effect of the rotor of the motor can be further enhanced, and the electromagnetic torque output capacity and the permanent magnet utilization rate are further improved; the verticality of the d-q axis magnetic field at the rotor side can be increased by the offset of the magnetic field of the permanent magnet, and the local saturation degree of the magnetic field is reduced; the short circuit cage bars are added on two sides of the U-shaped non-magnetic conductive layer, so that the magnetic flux paths can be more standardized, the magnetic density is uniformly distributed, and the dynamic response capability of the motor can be improved.
The novel double-permanent-magnet auxiliary cage-barrier rotor synchronous motor has the remarkable advantages of excellent performance, novel structure, low cost, high mechanical strength, reliable operation, convenience in industrialization and the like.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the overall structure of a motor according to the present invention;
FIG. 2 is a schematic view of the outer rotor structure of the motor of the present invention;
fig. 3 is a schematic diagram of an inner rotor structure of the motor of the present invention;
FIG. 4 is a schematic view of a stator structure of the motor of the present invention;
FIG. 5 is a schematic diagram of an auxiliary permanent magnet of the motor of the present invention;
FIG. 6 is a schematic diagram of a shorting cage bar of the motor of the present invention;
FIG. 7 is an overall schematic of a shorting cage bar of the motor of the present invention;
in the figure: 1. the motor comprises a shell, an outer rotor, a stator, an inner rotor, a rotating shaft, a stator winding, a steel sleeve, a permanent magnet, a short circuit cage bar, a non-magnetic layer, a magnetic conduction layer, a connecting rib, and a positioning pin, wherein the shell, the outer rotor, the stator, the inner rotor, the rotating shaft, the stator winding, the steel sleeve, the permanent magnet, the short circuit cage bar, the non-magnetic layer, the magnetic conduction layer, the connecting rib and the positioning pin are arranged in sequence.
The specific embodiment is as follows: the invention is described in detail below with reference to the attached drawing figures:
the utility model provides a supplementary cage barrier rotor synchronous motor of double permanent magnetism, mainly includes casing (1), external rotor (2), stator (3), internal rotor (4) and pivot (5), its characterized in that: the outer rotor (2) is connected with the shell (1) through a dovetail groove, a stator (3) with stator grooves at two sides is arranged between the outer rotor (2) and the inner rotor (4), three-phase symmetrical stator windings (6) are embedded in the stator grooves, the inner rotor (4) is connected with the rotating shaft (5) through a steel sleeve (7), the inner rotor (4) is connected with the steel sleeve (7) through the dovetail groove, and the steel sleeve (7) is fixed with the rotating shaft (5) through a positioning pin (13); the inner rotor and the outer rotor adopt magnetic barrier type reluctance rotor structures formed by axially laminating, magnetic conductive layers (11) are arranged on the inner rotor lamination and the outer rotor lamination, uniform non-magnetic conductive layers (10) with equal width are reserved between the adjacent two magnetic conductive layers (11), the non-magnetic conductive layers (10) are tangential, namely, the bottom of the U-shaped structure is added with a segmented anisotropic magnetizing permanent magnet (8) with sinusoidal variation of width and magnetizing direction, and short circuit cage bars (9) are embedded in the non-magnetic layers (10) at two sides.
The motor adopts a double-rotor structure, and air gaps are arranged between the outer rotor (2), the inner rotor (4) and the stator (3).
The inner rotor (4) and the outer rotor (2) are made of lamination sheets made of silicon steel sheet materials which are laminated in the axial direction; the proper width ratio between the magnetic conductive layer (11) and the non-magnetic layer (10) is selected according to the influence on the magnetic field modulation capability, and the magnetic conductive layers (11) are connected through connecting ribs to form a whole.
The inner rotor and the outer rotor adopt cage barrier rotors with U-shaped structures; the non-magnetic layers (10) are U-shaped structures, and short circuit cage bars (9) with different end lengths are embedded at two sides of each U-shaped non-magnetic layer (10).
The double permanent magnet auxiliary cage barrier rotor synchronous motor is characterized in that: the short circuit cage bars (9) are of unequal width structure (namely, the short circuit cage bars (9) on each layer are of unequal width, namely, the structures with unequal width are close to air gaps and narrow are close to rotating shafts), the short circuit cage bars (9) are placed in trapezoid non-magnetic layers on two sides of a rotor axis, the ends of the short circuit cage bars (9) are connected by conductors which are symmetrical on two sides of the rotor axis of the permanent magnet auxiliary cage barrier to form a plurality of groups of concentric annular loops (for example, after the upper ends and the lower ends of the short circuit cage bars (9) embedded in the same non-magnetic layer are connected, annular loops are formed, and the annular loops on the inner adjacent non-magnetic layers and the outer adjacent annular loops are concentric annular loops)
Fig. 1 is a schematic cross-sectional view of a motor according to the present invention, and as shown in the drawing, the double permanent magnet auxiliary cage barrier rotor synchronous motor according to the present invention sequentially comprises a casing 1, an outer rotor 2, a stator 3, a stator winding 6, an inner rotor 4, a steel sleeve 7, and a rotating shaft 5 along a radial direction. An air gap is arranged between the inner rotor and the outer rotor and between the outer rotor and the stator.
Fig. 2 is a schematic structural diagram of an outer rotor of the motor according to the present invention, and an outer rotor 2 is disposed in a casing 1. The outer rotor is connected with the shell through a dovetail groove.
Fig. 3 is a schematic diagram of an inner rotor structure of the motor of the invention, wherein an inner rotor 4 is arranged at the inner side of a stator 3, the inner rotor 4 is connected with a rotating shaft 5 through a steel sleeve 7, the inner rotor 4 is connected with the steel sleeve 7 through a dovetail groove, and the steel sleeve 7 and the rotating shaft 5 are fixed together through a positioning pin 13.
As shown in fig. 2 and 3, the whole inner rotor and the whole outer rotor adopt magnetic barrier structures, and the rotor lamination is formed by laminating silicon steel sheets along the axial direction, so that the eddy current loss in the rotor can be reduced, and the efficiency of the motor is improved. In the figure, 6 pole motors are taken as an example, 6 salient poles are respectively arranged on an inner magnetic barrier rotor and an outer magnetic barrier rotor, a plurality of trapezoidal grooves with equal width are formed on the surfaces of each salient pole, a plurality of conductors are embedded in each trapezoidal groove to form a short circuit cage bar 9, the formed trapezoidal grooves enable the inner rotor and the outer rotor to respectively form a plurality of magnetic conduction layers 11, and the width of each magnetic conduction layer 11 has little influence on the coupling capacity of the rotor, so that the width of each magnetic conduction layer 11 can be equal to that of the rotor for processing, the width ratio between each magnetic conduction layer 11 and each trapezoidal groove is equal, and at the moment, the magnetic conduction layers 11 with uniform thickness and the trapezoidal grooves can be uniformly distributed on 12 rotor salient poles at intervals. In order to connect the magnetic conductive layers 11 distributed at intervals into a whole, the magnetic conductive layers 11 of the inner rotor and the outer rotor are connected through connecting ribs with equal widths, and the connecting ribs should ensure enough mechanical strength. The salient pole central lines of the inner magnetic barrier rotor and the outer magnetic barrier rotor are taken as symmetry axes, a plurality of groups of trapezoidal magnetism isolating layers are arranged on the inner rotor and the outer rotor along the axial direction, and the magnetism isolating layers are respectively combined with trapezoid grooves embedded with the short circuit cage bars 9 to form a plurality of groups of U-shaped non-magnetic conductive layers 10.
Fig. 4 is a schematic diagram of a stator structure of the motor according to the present invention, the stator is disposed between an inner rotor and an outer rotor, both sides of the stator are grooved, three-phase symmetrical stator windings 6 are embedded in grooves on both sides, multiple layers of windings are embedded in each groove, and the windings of each layer are insulated from each other. The stator windings 6 are all short-distance distributed double-layer windings so as to improve the waveforms of motor electromotive force and magnetomotive force, reduce harmonic content and reduce the distortion rate of output voltage and current.
Fig. 5 is a schematic diagram of an auxiliary permanent magnet of the motor, wherein the permanent magnet 8 is embedded at the bottom of a U-shaped non-magnetic conductive layer of the same salient pole of the inner rotor and the outer rotor, the permanent magnets 8 have equal width but unequal length, and the central lines of salient poles of the respective rotors are taken as symmetry axes. The permanent magnet 8 should be in an interference fit with the non-magnetically conductive layer 10 to prevent the permanent magnet from being thrown out during rotation of the motor. The permanent magnets 8 are embedded at the bottoms of the U-shaped non-magnetic conductive layers 10, the torque expression of the permanent magnet auxiliary reluctance motor formed after embedding is shown as formula (1), and the added auxiliary permanent magnets 8 can increase the permanent magnet torque of the motor according to the formula, so that the torque density of the motor is improved. The permanent magnets 8 are arranged in a manner that the width and the magnetizing direction are changed in a sine way, namely, the permanent magnets are divided into permanent magnet blocks with different widths, and the magnetizing direction of each permanent magnet is magnetized according to the direction required by the generated sine magnetic field, so that the permanent magnetic field close to an air gap is more concentrated, the salient pole ratio of the motor is improved, and the electromagnetic torque output capacity and the permanent magnet utilization ratio are further improved; meanwhile, the permanent magnets with different magnetizing directions and different widths can enable the distribution of the air gap magnetic flux density of the motor to be more close to sine, in addition, the verticality of the d-q axis magnetic field at the rotor side can be increased by the deflection of the magnetic field of the permanent magnets, the local saturation degree of the magnetic field is reduced, and the permanent magnets 8 close to the edge of the non-magnetic conductive layer have stronger anti-demagnetizing capability.
Wherein p is the pole pair number of the motor, and psi f Flux linkage for permanent magnet, L d And L is equal to q Respectively the stator direct and quadrature axis inductances, alpha is the current vector i s And a d-axis clamping angle.
Fig. 6 is a schematic diagram of a short circuit cage bar of the motor of the invention, wherein the short circuit cage bars 9 embedded on two sides of each U-shaped non-magnetic conductive layer 10 of the inner rotor and the outer rotor are connected into an annular loop through the end parts, the number of the annular loop groups is equal to or smaller than the number of non-magnetic conductive layers, i.e. the short circuit cage bars 9 can be partially or completely embedded in the non-magnetic conductive layers 10. The embedded short circuit cage bars 9 can increase the quadrature axis magnetic resistance of the rotor and reduce the direct axis magnetic resistance of the rotor, so that the magnetic flux path in the motor rotor is more standardized, the salient pole ratio of the motor rotor is improved, and the magnetic resistance torque of the motor is improved. Meanwhile, the added short circuit cage bars 9 are similar to damping cages of the permanent magnet motor, and after the cage bars are added, the carrying capacity of the motor is improved, the output torque is increased, the torque pulsation is reduced, the dynamic characteristics are improved, and the running performance of the motor is obviously improved. The width of the non-magnetic conductive layer close to the air gap in the non-magnetic conductive layer 10 is larger than or equal to the width of the non-magnetic conductive layer close to the rotating shaft, even if the non-magnetic conductive layer forms a trapezoid groove shape, the purpose is to reduce the influence of uneven current distribution in the short circuit cage bars 9 caused by the skin effect of induced current; the number of layers of the cage bars in the non-magnetic conductive layer 10 can be single-layer or multi-layer, the layers are mutually insulated, the cage bars and the rotor are mutually connected through the end parts to form a loop, the purpose of the cage bars is to reduce the influence of the skin effect of induced current in the cage bars, reduce the loss of the motor, improve the efficiency, and simultaneously improve the air gap flux density distribution of the motor, so that the air gap is more close to sine, and the coupling capability of the rotor of the permanent magnet auxiliary cage barrier motor is further improved.
In summary, the double-permanent-magnet auxiliary cage barrier rotor structure provided by the invention can obviously enhance the coupling capability of the rotor, not only can improve the power density and torque density of the motor and enhance the steady state and dynamic characteristics of the motor, but also can save the effective materials of the motor, and has the advantages of novel structure, low cost, convenience in industrialization and the like.
Claims (4)
1. The utility model provides an adopt birotor synchronous machine of supplementary cage barrier rotor of permanent magnetism, mainly includes casing (1), external rotor (2), stator (3), internal rotor (4) and pivot (5), its characterized in that: the outer rotor (2) is connected with the shell (1) through a dovetail groove, a stator (3) with stator grooves at two sides is arranged between the outer rotor (2) and the inner rotor (4), three-phase symmetrical stator windings (6) are embedded in the stator grooves, the inner rotor (4) is connected with the rotating shaft (5) through a steel sleeve (7), the inner rotor (4) is connected with the steel sleeve (7) through the dovetail groove, and the steel sleeve (7) is fixed with the rotating shaft (5) through a positioning pin (13); the inner rotor and the outer rotor are respectively of a magnetic barrier type reluctance rotor structure formed by axially laminating, magnetic conductive layers (11) are arranged on the inner rotor lamination and the outer rotor lamination, uniform non-magnetic conductive layers (10) with equal widths are reserved between the adjacent two magnetic conductive layers (11), the non-magnetic layers (10) are tangential, the non-magnetic layers (10) are of U-shaped structures, namely, a segmented anisotropic magnetizing permanent magnet (8) is added at the bottom of each U-shaped structure, and short circuit cage bars (9) are embedded in the non-magnetic layers (10) at the two sides;
the segmented anisotropic magnetizing permanent magnets are segmented anisotropic magnetizing permanent magnets with the widths and magnetizing directions being changed in a sine manner, so that permanent magnetic fields close to an air gap are more concentrated, the magnetic flux density distribution of the air gap of the motor is more similar to sinusoidal distribution, the harmonic content is low, and the magnetic density distribution is more uniform;
the motor adopts a double-rotor structure, and air gaps are arranged between the outer rotor (2), the inner rotor (4) and the stator (3).
2. A dual rotor synchronous motor employing permanent magnet auxiliary barrier rotors according to claim 1 wherein: the inner rotor (4) and the outer rotor (2) are made of lamination sheets made of silicon steel sheet materials which are laminated in the axial direction; the proper width ratio between the magnetic conductive layer (11) and the non-magnetic layer (10) is selected according to the influence on the magnetic field modulation capability, and the magnetic conductive layers (11) are connected through connecting ribs to form a whole.
3. A dual rotor synchronous motor employing permanent magnet auxiliary barrier rotors according to claim 1 wherein: the inner rotor and the outer rotor adopt cage barrier rotors with U-shaped structures; the non-magnetic layers (10) are U-shaped structures, and short circuit cage bars (9) with different end lengths are embedded at two sides of each U-shaped non-magnetic layer (10).
4. A dual rotor synchronous motor employing permanent magnet auxiliary barrier rotors according to claim 1 wherein: the short circuit cage bars (9) are of unequal-width structures, namely, unequal-width structures with wide air gaps and narrow rotating shafts, the short circuit cage bars (9) are placed in trapezoid non-magnetic guide layers on two sides of a rotor axis, and the ends of the short circuit cage bars (9) are connected through conductors which are symmetrical on two sides of the rotor axis of the permanent magnet auxiliary cage barrier, so that a plurality of groups of concentric annular loops are formed.
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| CN201811107045.3A CN109245468B (en) | 2018-09-21 | 2018-09-21 | Birotor synchronous motor adopting permanent magnet auxiliary cage barrier rotor |
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| CN201811107045.3A CN109245468B (en) | 2018-09-21 | 2018-09-21 | Birotor synchronous motor adopting permanent magnet auxiliary cage barrier rotor |
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| CN109245468B true CN109245468B (en) | 2023-11-28 |
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| CN109861425A (en) * | 2019-03-14 | 2019-06-07 | 江苏迈吉易威电动科技有限公司 | It is a kind of mix cage rotor line-start permanent magnetic synchronous motor and its starting method |
| CN110601481A (en) * | 2019-10-25 | 2019-12-20 | 山东大学 | Birotor permanent magnet synchronous reluctance motor and configuration method |
| CN111371274B (en) * | 2020-03-30 | 2021-09-28 | 东南大学 | Wide speed regulation type magnetic field modulation double-fed motor |
| CN113224863A (en) * | 2021-06-03 | 2021-08-06 | 哈尔滨理工大学 | Novel permanent magnet auxiliary synchronous reluctance motor structure |
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| CN103956872B (en) * | 2014-04-25 | 2018-07-20 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and its rotor |
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| JP2011172439A (en) * | 2010-02-22 | 2011-09-01 | Tamagawa Seiki Co Ltd | Magnet embedded type cylindrical linear motor |
| CN102064655A (en) * | 2010-12-16 | 2011-05-18 | 中国航天科技集团公司第四研究院四○一所 | Permanent magnet brushless motor with sinusoidal air gap density |
| CN209930110U (en) * | 2018-09-21 | 2020-01-10 | 沈阳工业大学 | Double-permanent-magnet auxiliary cage barrier rotor synchronous motor |
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