CN107124055B - Rotor of compressor, permanent magnet motor and compressor - Google Patents
Rotor of compressor, permanent magnet motor and compressor Download PDFInfo
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- CN107124055B CN107124055B CN201710526273.3A CN201710526273A CN107124055B CN 107124055 B CN107124055 B CN 107124055B CN 201710526273 A CN201710526273 A CN 201710526273A CN 107124055 B CN107124055 B CN 107124055B
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- 238000004804 winding Methods 0.000 claims description 41
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a rotor of a compressor, a permanent magnet motor and the compressor, wherein the rotor of the permanent magnet motor comprises: rotor core and rotor magnet, rotor core have the magnet groove, and rotor magnet installs in the magnet groove, and the both ends in magnet groove all are equipped with first non-magnetic part and second non-magnetic part, and second non-magnetic part cuts off with first non-magnetic part, and the at least part of second non-magnetic part is located one side of first non-magnetic part towards the magnetic pole central line and satisfies: 0.6L1L 3 is less than or equal to L2 and is less than or equal to 0.95L1, wherein L1 is the distance between two ends of each rotor magnet, L2 is the distance between the ends, close to the magnetic pole center line, of the two first nonmagnetic parts corresponding to each magnet slot, and L3 is the distance between the ends, close to the magnetic pole center line, of the two second nonmagnetic parts corresponding to each magnet slot. The rotor of the permanent magnet motor can effectively reduce the third harmonic wave of opposite potential, is beneficial to reducing the loss of the permanent magnet motor and improves the performance of the permanent magnet motor.
Description
Technical Field
The invention belongs to the technical field of compressor manufacturing, and particularly relates to a rotor of a compressor, a permanent magnet motor with the rotor and a compressor with the permanent magnet motor.
Background
In the existing motor manufacturing process, a star connection method is adopted for windings, and aiming at motors with a neutral point or a plurality of neutral points and some wire diameters, the winding difficulty in the manufacturing process is high, the process beat is slow, the automation degree is low, the production efficiency is affected, the manufactured motor end is high, and the material utilization rate is low.
When the winding adopts the triangle connection method, the triangle winding can adopt smaller wire diameter and more turns on the premise of obtaining the same induced electromotive force, the length of the end part of the motor can be effectively reduced, the cost is reduced, the neutral point is removed, and the manufacturability is improved. However, the third harmonic of the counter potential in the triangular winding can generate circulation in the triangular closed winding, so that loss is generated to reduce the motor performance, and the application of the triangular connection method is severely restricted.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention proposes a rotor for a permanent magnet machine which can effectively reduce the third harmonic of the opposite potential.
A rotor of a permanent magnet motor according to an embodiment of the present invention includes: rotor core and rotor magnet, rotor core has the magnet groove, rotor magnet installs in the magnet groove, the both ends in magnet groove all are equipped with first non-magnetic part and second non-magnetic part, second non-magnetic part with first non-magnetic part cuts off, just at least part of second non-magnetic part is located one side towards the magnetic pole central line of first non-magnetic part, and satisfies: 0.6L1L 3 is less than or equal to L2 and is less than or equal to 0.95L1, wherein L1 is the distance between two ends of each rotor magnet, L2 is the distance between the ends, close to the magnetic pole center line, of the two first non-magnetic parts corresponding to each magnet slot, and L3 is the distance between the ends, close to the magnetic pole center line, of the two second non-magnetic parts corresponding to each magnet slot.
According to the rotor of the permanent magnet motor, circulation generated by third harmonic waves with opposite electric potential can be effectively reduced, loss of the permanent magnet motor can be reduced, and performance of the permanent magnet motor is improved.
According to the rotor of the permanent magnet motor of one embodiment of the present invention, the contour of the second non-magnetic portion near the outer periphery of the rotor core includes an outer arc-shaped section having a center of curvature outside the outer periphery of the rotor core, and the contour of the second non-magnetic portion near the center of the rotor core includes an inner arc-shaped section having a center of curvature outside the outer periphery of the rotor core.
According to the rotor of the permanent magnet motor of one embodiment of the present invention, the contour of the first non-magnetic portion near the outer periphery of the rotor core includes an outer arc-shaped section having a center of curvature outside the outer periphery of the rotor core, and the contour of the first non-magnetic portion near the center of the rotor core includes an inner arc-shaped section having a center of curvature outside the outer periphery of the rotor core.
Preferably, the following is satisfied: and the angle alpha is equal to or more than 60 degrees/P and equal to or less than 90 degrees/P, wherein alpha is an included angle between a connecting line of the curvature center and the center of the rotor and a corresponding magnetic pole center line, and P is the pole pair number of the rotor magnet.
Preferably, the outer arc section and the inner arc section are connected through a curve section or a straight line section.
According to one embodiment of the invention, the rotor of the permanent magnet machine, the second non-magnetic part comprises a plurality of spaced apart non-magnetic sub-parts.
According to one embodiment of the invention, the rotor of the permanent magnet motor comprises one or more sections of magnets per pole.
The invention also provides a permanent magnet motor of the compressor, which is provided with the rotor.
Preferably, the winding is divided into three coil groups, and the wire inlet end of each coil group is connected with the wire outlet end of the next coil group, so that the winding is connected into a closed loop, and a connecting wire is led out between every two coil groups to be connected with an external circuit.
Preferably, the windings are three-phase symmetrical windings.
The advantages of the permanent magnet motor and the rotor are the same as those of the rotor in the prior art, and are not described in detail herein.
The invention also provides a compressor provided with the permanent magnet motor.
The advantages of the compressor and the permanent magnet motor are the same as those of the permanent magnet motor in the prior art, and are not described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIGS. 1-3 are schematic structural views of a rotor according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a permanent magnet motor according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a winding series connection according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a winding parallel connection according to an embodiment of the invention;
fig. 7 is a schematic structural view of a compressor according to an embodiment of the present invention;
FIG. 8 is a graph comparing the 3 rd order harmonics of the opposite potential of a permanent magnet motor according to an embodiment of the present invention with the related art;
fig. 9 is a graph comparing the waveforms of the opposite electric potentials of the permanent magnet motor according to the embodiment of the present invention with those of the conventional scheme.
Reference numerals:
a compressor 10000,
the permanent magnet motor 1000 is provided with a permanent magnet,
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
A rotor 200 of a permanent magnet motor 1000 according to an embodiment of the present invention is described below with reference to fig. 1-3.
As shown in fig. 1 to 3, a rotor 200 of a permanent magnet motor 1000 according to an embodiment of the present invention includes: a rotor core 210 and a rotor magnet 220.
The rotor core 210 has magnet slots 213, the rotor magnet 220 is mounted in the magnet slots 213, the magnet slots 213 may be plural, and the plural magnet slots 213 may be disposed at intervals along the circumferential direction of the rotor core 210, such as 6 magnet slots 213 are disposed at intervals uniformly along the circumferential direction of the rotor core 210 in the embodiment shown in fig. 1, and each magnet slot 213 is provided with a pole of the rotor magnet 220.
The two ends of the magnet slot 213 are respectively provided with a first non-magnetic part 211 and a second non-magnetic part 212, the two ends of the magnet slot 213 refer to two ends (not the thickness direction and the axial direction) along the width direction of the magnet slot 213, the first non-magnetic part 211 and the second non-magnetic part 212 can be hollow slots formed on the rotor core 210, the magnetic permeability of air is far less than that of the rotor core 210 (such as steel), or the hollow slots are filled with materials with magnetic permeability after the hollow slots are formed.
The first non-magnetic part 211 may be in communication with the magnet slot 213, such as in the embodiment shown in fig. 1, the first non-magnetic part 211 may extend from the end of the magnet slot 213 to the outside in a direction away from the magnetic pole center line, and then turn back to extend in a direction close to the magnetic pole center line, and at least part of the first non-magnetic part 211 may be located outside the magnet slot 213, and it should be noted that the outside refers to a direction toward the outer circumference of the rotor core 210, and the magnetic pole center line is the center line of the rotor magnet 220 in the magnet slot 213, such as in the embodiment shown in fig. 1-3, and the magnetic pole center line is the center line of the magnet slot 213, and the magnetic pole center line passes through the center of the rotor 200.
The second non-magnetic part 212 is separated from the first non-magnetic part 211, that is, a certain thickness of the rotor core 210 may be left between the second non-magnetic part 212 and the first non-magnetic part 211, at least part of the second non-magnetic part 212 is located at one side of the first non-magnetic part 211 facing the magnetic pole center line, for example, one end of the second non-magnetic part 212 facing away from the magnetic pole center line may be spaced apart from the first non-magnetic part 211, and the second non-magnetic part 212 may extend from the end in an outward direction like being close to the magnetic pole center line.
It will be appreciated that by providing the first nonmagnetic section 211 and the second nonmagnetic section 212 in the above-described configuration, the conduction of the magnetic field at the end of the magnet slot 213 can be effectively blocked, thereby reducing the third harmonic of the opposite potential.
As shown in FIG. 9, the sine degree difference of the opposite potential waveforms in the related art is high in harmonic content, the sine degree of the opposite potential waveforms in the embodiment of the invention is high, the harmonic content is low, and through a large number of experiments, as shown in FIG. 8, the third harmonic content of the opposite potential in the embodiment of the invention is about 21% lower than that in the prior art, and particularly, the circulation caused by a winding triangle connection method can be effectively reduced.
Further, the definition satisfies: 0.6L1L 3 < L2 0.95L1, where L1 is the distance between the two ends of each pole rotor magnet 220, L2 is the distance between the ends of the two first nonmagnetic sections 211 corresponding to each magnet slot 213 near the pole center line, and L3 is the distance between the ends of the two second nonmagnetic sections 212 corresponding to each magnet slot 213 near the pole center line. In this way, the rotor 200 is excellent in manufacturability, and can effectively reduce the reverse potential third harmonic, and particularly, the effect of reducing the circulating current generated by the reverse potential third harmonic by the winding triangle connection is excellent.
According to the rotor 200 of the permanent magnet motor 1000, the third harmonic wave of opposite potential can be effectively reduced, the loss of the permanent magnet motor 1000 can be reduced, and the performance of the permanent magnet motor 1000 can be improved.
As shown in fig. 1 to 3, according to the rotor 200 of the permanent magnet motor 1000 of a preferred embodiment of the present invention, the profile of the second non-magnetic part 212 near the outer circumference of the rotor core 210 includes an outer arc-shaped section, the curvature center of the outer arc-shaped section of the second non-magnetic part 212 is outside the outer circumference of the rotor core 210, the profile of the second non-magnetic part 212 near the center of the rotor core 210 includes an inner arc-shaped section, and the curvature center of the inner arc-shaped section of the second non-magnetic part 212 is outside the outer circumference of the rotor core 210.
The outer arc section of the second non-magnetic portion 212 may be a fitting line of a circular arc or an approximate circular arc, and the inner arc section of the second non-magnetic portion 212 may be a fitting line of a circular arc or an approximate circular arc, and the outer arc section of the second non-magnetic portion 212 and the inner arc section of the second non-magnetic portion 212 may be connected by a curved section or a straight line section, and in the embodiment shown in fig. 1-3, the outer arc section of the second non-magnetic portion 212 and the inner arc section of the second non-magnetic portion 212 are connected by a straight line section. The inventors found through a large number of experiments that the second nonmagnetic section 212 of the above-described shape is excellent in reducing the third harmonic of the opposite potential, and particularly in reducing the circulating current generated by the third harmonic of the opposite potential by the winding triangle connection.
The contour of the first non-magnetic part 211 near the outer circumference of the rotor core 210 includes an outer arc-shaped section, the center of curvature of the outer arc-shaped section of the first non-magnetic part 211 is outside the outer circumference of the rotor core 210, and the contour of the first non-magnetic part 211 near the center of the rotor core 210 includes an inner arc-shaped section, the center of curvature of the inner arc-shaped section is outside the outer circumference of the rotor core 210.
The outer arc section of the first non-magnetic part 211 may be a fitting line of a circular arc or an approximate circular arc, the inner arc section of the first non-magnetic part 211 may be a fitting line of a circular arc or an approximate circular arc, the outer arc section of the first non-magnetic part 211 and the inner arc section of the first non-magnetic part 211 may be connected by a curved section or a straight line section, and in the embodiment shown in fig. 1-3, the outer arc section of the first non-magnetic part 211 and the inner arc section of the first non-magnetic part 211 are connected by a multi-section straight line section. The inventors have found through a large number of experiments that the first nonmagnetic section 211 of the above-described shape is excellent in reducing the third harmonic of the opposite potential, and particularly in reducing the circulating current generated by the third harmonic of the opposite potential by the winding triangle connection.
In a specific embodiment, as shown in fig. 1-3, the outer arc section of the first nonmagnetic portion 211 and the outer arc section of the second nonmagnetic portion 212 are both arc sections of the same circle, the inner arc section of the first nonmagnetic portion 211 and the inner arc section of the second nonmagnetic portion 212 are both arc sections of the same circle, the diameter of the circle where the outer arc section is located is smaller than the diameter of the circle where the inner arc section is located, and the distance between the center of the circle where the outer arc section is located and the corresponding magnetic pole center line is smaller than the distance between the center of the circle where the inner arc section is located and the corresponding magnetic pole center line.
As shown in fig. 1 to 3, satisfies: 60 °/p+.ltoreq.α+.90 °/P, where α may be an angle between a line connecting the center of curvature of the outer arc section of the first nonmagnetic section 211 and the center of the rotor 200 and the corresponding magnetic pole center line, or α may be an angle between a line connecting the center of curvature of the inner arc section of the first nonmagnetic section 211 and the center of the rotor 200 and the corresponding magnetic pole center line, or α may be an angle between a line connecting the center of curvature of the outer arc section of the second nonmagnetic section 212 and the center of the rotor 200 and the corresponding magnetic pole center line, or α may be an angle between a line connecting the center of curvature of the inner arc section of the second nonmagnetic section 212 and the center of the rotor 200 and the corresponding magnetic pole center line, and P is a pole pair number of rotor magnets 220, such as in the embodiment shown in fig. 1-3, the rotor 200 includes six rotor magnets 220, p=3.
Alternatively, as shown in FIGS. 1-2, the second non-magnetic portion 212 may be a unitary non-magnetic portion.
Alternatively, as shown in FIG. 3, the second non-magnetic portion 212 may include a plurality of spaced apart non-magnetic sub-portions, such as two in FIG. 3, that is, the plurality of non-magnetic sub-portions are not in communication with each other.
As shown in fig. 1 and 3, each pole rotor magnet 220 may include one segment of magnet, and in alternative embodiments, as shown in fig. 2, each pole rotor magnet 220 includes multiple segments of magnets, such as two segments of magnets.
As shown in fig. 1 to 3, the rotor 200 of the permanent magnet motor 1000 according to a preferred embodiment of the present invention satisfies: 0.6L1L 3 < L2 0.95L1, where L1 is the distance between the two ends of each pole rotor magnet 220, L2 is the distance between the ends of the two first nonmagnetic sections 211 corresponding to each magnet slot 213 near the pole center line, and L3 is the distance between the ends of the two second nonmagnetic sections 212 corresponding to each magnet slot 213 near the pole center line. In this way, the rotor 200 is excellent in manufacturability, and can effectively reduce the reverse potential third harmonic, and particularly, the effect of reducing the circulating current generated by the reverse potential third harmonic by the winding triangle connection is excellent.
The invention also discloses a permanent magnet motor 1000 of the compressor 10000.
As shown in fig. 4 to 6, the permanent magnet motor 1000 of the compressor 10000 includes: a stator and a rotor 200. The rotor 200 may be any of the rotor 200 embodiments described above. According to the permanent magnet motor 1000 provided by the embodiment of the invention, the circulation generated by the third harmonic of opposite potential can be effectively reduced, and the permanent magnet motor 1000 has small loss and good performance.
As shown in fig. 4, the stator includes a stator core 110 and windings, the stator core 110 has a plurality of winding slots 112 spaced apart in a circumferential direction, winding teeth 111 are formed between two adjacent winding slots 112, the plurality of winding teeth 111 are spaced apart in a circumferential direction, the windings are wound outside the winding teeth 111, the stator core 110 further defines an inner cavity for accommodating a rotor core 210, and the rotor core 210 may be disposed in the inner cavity of the stator core 110.
As shown in fig. 4, the windings may be divided into three coil 120 groups, where the wire inlet end of each coil 120 group is connected to the wire outlet end of the next coil 120 group, so that the windings are connected into a closed loop, and connecting wires are led out between every two coil 120 groups to connect with an external circuit, so that the three connecting wires are respectively connected with three phases of the external circuit, and the windings may be three-phase symmetrical windings.
In other words, the windings of the permanent magnet motor 1000 are connected in a delta-shape, and the above-mentioned structure of the rotor 200 can effectively reduce the circulation current caused by the delta-shape connection, so that the permanent magnet motor 1000 has the advantage of the delta-shape connection of the windings, that is, the delta-shape windings can use smaller line widths and more turns on the premise of obtaining the same induced electromotive force, so that the length of the end part of the motor can be effectively reduced, the cost is reduced, the neutral point is removed, and the manufacturability is improved.
Each coil 120 set may include a plurality of coils 120, and the plurality of coils 120 of each coil 120 set may be connected in series or in parallel.
As shown in fig. 5, a plurality of coils 120 of each coil 120 group may be connected in series, for example, a permanent magnet motor 1000 with 18 slots and 6 poles distributed is used as AN example, each phase winding is connected in series with 3 coils 120, AN a phase incoming line AP and a C phase outgoing line CN are connected together and connected with a three-phase power supply U of AN external circuit, AN B phase incoming line BP and AN a phase outgoing line AN are connected together and connected with a three-phase power supply V of the external circuit, and AN C phase incoming line CP and AN B phase outgoing line BN are connected together and connected with a W of the three-phase power supply.
As shown in fig. 5, a plurality of coils 120 of each coil 120 group may be connected in parallel, and a permanent magnet motor 1000 in the form of parallel windings may be used for some low voltage or other process problems, and the wiring manner of fig. 3 may be used, which is different from the serial wiring manner in that 3 coils 120 are connected in parallel to each phase winding, and other arrangement forms are the same.
The invention also discloses a compressor 10000.
As shown in fig. 7, a compressor 10000 according to an embodiment of the present invention includes a permanent magnet motor 1000, a crankshaft 2000, a cylinder 3000, and a piston 4000 according to any of the above embodiments. The compressor 10000 according to the embodiment of the invention has stable operation and high efficiency.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A rotor for a permanent magnet motor, comprising: rotor core and rotor magnet, rotor core has the magnet groove, rotor magnet installs in the magnet groove, the both ends in magnet groove all are equipped with first non-magnetic part and second non-magnetic part, second non-magnetic part with first non-magnetic part cuts off, just at least part of second non-magnetic part is located one side towards the magnetic pole central line of first non-magnetic part, and satisfies: 0.6L1L 3 is less than or equal to L2 and is less than or equal to 0.95L1, wherein L1 is the distance between two ends of each rotor magnet, L2 is the distance between the ends, close to the magnetic pole center line, of the two first non-magnetic parts corresponding to each magnet slot, and L3 is the distance between the ends, close to the magnetic pole center line, of the two second non-magnetic parts corresponding to each magnet slot;
the contour of the second non-magnetic part near the outer periphery of the rotor core comprises an outer arc-shaped section with the curvature center outside the outer periphery of the rotor core, and the contour of the second non-magnetic part near the center of the rotor core comprises an inner arc-shaped section with the curvature center outside the outer periphery of the rotor core.
2. The rotor of a permanent magnet machine of claim 1, wherein the contour of the first non-magnetic portion proximate the outer periphery of the rotor core includes an outer arcuate segment having a center of curvature that is outside the outer periphery of the rotor core, and wherein the contour of the first non-magnetic portion proximate the center of the rotor core includes an inner arcuate segment having a center of curvature that is outside the outer periphery of the rotor core.
3. A rotor of a permanent magnet machine according to claim 1 or 2, characterized in that: and the angle alpha is equal to or more than 60 degrees/P and equal to or less than 90 degrees/P, wherein alpha is an included angle between a connecting line of the curvature center and the center of the rotor and a corresponding magnetic pole center line, and P is the pole pair number of the rotor magnet.
4. A rotor of a permanent magnet machine according to claim 1 or 2, wherein the outer arc section and the inner arc section are connected by a curved section or a straight section.
5. A rotor of a permanent magnet machine according to claim 1 or 2, wherein the second non-magnetic portion comprises a plurality of spaced apart non-magnetic sub-portions.
6. A rotor of a permanent magnet machine according to claim 1 or claim 2, wherein the rotor magnets comprise one or more segments of magnets per pole.
7. A permanent magnet motor for a compressor, comprising: a stator and a rotor as claimed in any one of claims 1 to 6, the stator comprising a stator core and windings.
8. The permanent magnet motor of claim 7 wherein the windings are divided into three coil groups, the incoming end of each coil group being connected to the outgoing end of the next coil group so that the windings are connected in a closed loop, and a connecting wire is led between each two coil groups to connect with an external circuit.
9. The permanent magnet motor of claim 7 wherein the windings are three-phase symmetrical windings.
10. A compressor comprising a permanent magnet motor according to any one of claims 7-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710526273.3A CN107124055B (en) | 2017-06-30 | 2017-06-30 | Rotor of compressor, permanent magnet motor and compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710526273.3A CN107124055B (en) | 2017-06-30 | 2017-06-30 | Rotor of compressor, permanent magnet motor and compressor |
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| CN107124055A CN107124055A (en) | 2017-09-01 |
| CN107124055B true CN107124055B (en) | 2023-05-30 |
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| CN108768023B (en) | 2018-08-13 | 2020-01-07 | 珠海格力电器股份有限公司 | Rotor assembly and alternating-pole motor |
| DE102020214207A1 (en) * | 2020-11-11 | 2022-05-12 | Volkswagen Aktiengesellschaft | Rotor with cavities, electric machine and motor vehicle |
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| JP2003304670A (en) * | 2002-04-09 | 2003-10-24 | Toyota Motor Corp | Method of manufacturing rotor for rotating machine |
| US7705502B2 (en) * | 2006-04-14 | 2010-04-27 | Emerson Electric Co. | Interior magnet machine with non-perpendicular slots |
| CN104734383A (en) * | 2015-04-02 | 2015-06-24 | 佛山市南海九洲普惠风机有限公司 | Novel rotor of brushless direct current motor |
| WO2016179841A1 (en) * | 2015-05-14 | 2016-11-17 | 广东美芝制冷设备有限公司 | Rotor of rotary motor, permanent magnet motor, compressor and air-conditioning system |
| CN206865253U (en) * | 2017-06-30 | 2018-01-09 | 广东美芝制冷设备有限公司 | Rotor, magneto, the compressor of compressor |
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