CN111969821A - Mixed excitation disc type motor - Google Patents

Mixed excitation disc type motor Download PDF

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Publication number
CN111969821A
CN111969821A CN202010877923.0A CN202010877923A CN111969821A CN 111969821 A CN111969821 A CN 111969821A CN 202010877923 A CN202010877923 A CN 202010877923A CN 111969821 A CN111969821 A CN 111969821A
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CN
China
Prior art keywords
rotor
armature
assembly
stator
excitation
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Pending
Application number
CN202010877923.0A
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Chinese (zh)
Inventor
吴海鹰
薛佳运
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Yikun Power Technology Shanghai Co ltd
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Yikun Power Technology Shanghai Co ltd
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Publication date
Application filed by Yikun Power Technology Shanghai Co ltd filed Critical Yikun Power Technology Shanghai Co ltd
Priority to CN202010877923.0A priority Critical patent/CN111969821A/en
Publication of CN111969821A publication Critical patent/CN111969821A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/021—Means for mechanical adjustment of the excitation flux
    • H02K21/022—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator
    • H02K21/025—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator by varying the thickness of the air gap between field and armature
    • H02K21/026—Axial air gap machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/021—Means for mechanical adjustment of the excitation flux
    • H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention discloses a hybrid excitation disc type motor which comprises a rotor and a stator, wherein the rotor is arranged on two sides of the stator, permanent magnetic flux exists between the rotor and the stator, the stator comprises an electric excitation assembly and can generate electric excitation flux for adjusting a magnetic field, and long yoke parts and short yoke parts are uniformly arranged on the rotor at intervals along the circumferential direction of the rotor and are used for forming a magnetic flux path. The invention provides a mixed excitation disk type motor, which realizes the adjustment of a magnetic field in an air gap by arranging an electric excitation assembly on a stator, so that the motor keeps the voltage of an output end stable when the load or the rotating speed changes, the electric excitation assembly can be arranged on the stator by adopting a structure that a long yoke part and a short yoke part are alternately arranged on a rotor at intervals, the shape of the motor realizes a flat design, the motor is favorably used in special space occasions, a main magnetic flux path of a permanent magnet and an auxiliary magnetic flux path of electric excitation can be fully utilized in a limited space, and the adjustment of the air gap magnetic field is realized in a brushless mixed excitation mode.

Description

Mixed excitation disc type motor
Technical Field
The invention relates to the technical field of motor production, in particular to a hybrid excitation disc type motor.
Background
The yoke-free segmented armature structure (YASA) axial flux permanent magnet synchronous generator consists of two rotors and one stator, has the advantages of high torque density, extremely short axial length, high efficiency and the like, and has a wide application prospect in the new energy automobile industry. However, the rotor of the conventional axial flux permanent magnet generator is excited by a permanent magnet material, the magnetic field is basically constant, when the generator and an engine form a unit for generating electricity, constant-voltage electricity generation is difficult to maintain along with the change of the rotating speed of the generator and the fluctuation of the load, and the generator has the defect that the air gap magnetic field is not adjustable, and becomes a bottleneck for restricting the further development of the generator on occasions with higher requirements on the quality of electric energy.
Meanwhile, no YASA structure axial flux permanent magnet synchronous motor has been searched for to have a hybrid excitation structure.
Disclosure of Invention
The invention aims to provide a hybrid excitation disc type motor to solve the problem that an air gap magnetic field of an axial flux permanent magnet synchronous generator in the prior art is not adjustable.
In order to achieve the above object, the present invention provides a hybrid excitation disc type motor including a rotor and a stator arranged in an axial direction of the motor, the rotor being provided at both sides of the stator with a permanent magnetic flux therebetween, the stator including an electro-magnetic assembly capable of generating an electro-magnetic flux for adjusting a magnetic field, long and short yoke portions being provided at regular intervals on the rotor along a circumferential direction of the rotor for forming a flux path, wherein,
the electric excitation magnetic flux generated by the electric excitation assembly can return to the electric excitation assembly after passing through the long yoke part of the rotor on one side, the rotor, the air gap between the rotor and the stator, the air gap between the other rotor and the stator, the short yoke part of the other rotor, the other rotor and the long yoke part of the other rotor in sequence, and a complete magnetic circuit of the electric excitation magnetic flux is formed.
Optionally, a ferromagnetic pole is provided on the long yoke portion.
Optionally, the rotor comprises a rotor core assembly, the rotor core assembly comprising: the rotor core is provided with rotor slots which are uniformly arranged at intervals along the circumferential direction of the rotor core; rotor permanent magnets arranged in the rotor slots along the radial direction of the rotor core,
the rotor yokes at the bottom of the rotor slot extend in the radial direction of the rotor core to form long yoke portions, and the rotor yokes adjacent to the long yoke portions in the circumferential direction of the rotor core form short yoke portions.
Alternatively, the end portion of the long yoke portion protruding in the radial direction of the rotor core is located inside the rotor core.
Alternatively, the end portion of the long yoke portion protruding in the radial direction of the rotor core is located outside the rotor core.
Alternatively, one end of the long yoke portion is provided with a ferromagnetic pole in a radial direction of the rotor core, and a first support block is provided between the ferromagnetic pole and the rotor permanent magnet.
Alternatively, one end of the short yoke portion is provided with a second support block in the radial direction of the rotor core for keeping correspondence with the end of the long yoke portion that protrudes.
Optionally, a pressing block is arranged between the first supporting block and the second supporting block along the circumferential direction of the rotor core, and the pressing block is arranged along the radial direction of the rotor core and is used for pressing the ferromagnetic pole, the first supporting block and the second supporting block.
Optionally, the press block, the first support block and the second support block are all of a non-magnetically conductive material.
Optionally, the rotor further comprises a mounting disc for mounting the assembled rotor core assembly.
Optionally, the mounting disc includes interior ring portion and outer loop portion, forms the installation cavity that is used for installing rotor core subassembly between interior ring portion and the outer loop portion, and interior ring portion is equipped with the installation department, and the installation department is equipped with the mounting hole along the radial inside side protrusion of rotor on the installation department for the installation of rotor.
Optionally, the electric excitation assembly comprises a coil assembly and a flux sleeve, and the flux sleeve is coaxially arranged with the coil assembly and is used for conducting the electric excitation magnetic flux generated by the coil assembly.
Optionally, the coil assembly includes a coil and an insulating frame, the coil is wound on the insulating frame, and the flux sleeve is coaxial with the insulating frame.
Optionally, the stator further comprises an armature for generating a permanent magnetic flux, the armature is disposed coaxially with the electro-magnetic component, and the permanent magnetic flux generated by the armature and the permanent magnetic flux generated by the rotor constitute a main magnetic flux.
Optionally, the armature is a yokeless segmented armature.
Optionally, the armature comprises: the armature plate is provided with armature grooves which are uniformly arranged at intervals along the circumferential direction of the armature plate; an armature core provided with a winding coil, wherein,
the armature plates are located at two ends of the armature core, the end portions of the armature core are located in the armature slots, and the winding coils are located between the armature plates.
Optionally, the flux sleeve of the electro-magnetic assembly is tightly attached to the hole wall of the central hole of the armature plate, and the coil assembly of the electro-magnetic assembly is located between the armature plates.
Optionally, the flux sleeve of the electro-magnetic assembly is closely attached to the outer edge of the armature plate, and the coil assembly of the electro-magnetic assembly is located between the armature plates.
Optionally, the outer side edge of the armature plate is provided with a convex portion, and the upper end and the lower end of the flux sleeve are provided with grooves, and the grooves are engaged with the convex portion.
As described above, the hybrid excitation disc type motor provided by the invention realizes the magnetization or demagnetization of the magnetic field in the air gap of the motor by arranging the electric excitation assembly on the stator, so that the motor keeps the voltage of the output end stable when the load fluctuation and the rotating speed change. Meanwhile, the rotor is provided with a structure that the long yoke parts and the short yoke parts are alternated at intervals, so that an electric excitation assembly arranged on the stator can form an electric excitation magnetic circuit through the long yoke parts and the short yoke parts, the motor shape is flattened, the electric excitation assembly is favorably applied to special space occasions, a main magnetic flux path of permanent magnets and an auxiliary magnetic flux path of electric excitation can be fully utilized in a limited space, and the adjustment of an air gap magnetic field is realized in a brushless mixed excitation mode.
In order that the foregoing and other objects, features, and advantages of the invention will be readily understood, a preferred embodiment of the invention will be hereinafter described in detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 schematically shows a structural cross-sectional view of a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 2 is a schematic structural sectional view showing a rotor in a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 3 is a schematic diagram showing an exploded structure of a rotor in a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 4 is a schematic view showing a structure of a rotor core in a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a compact in a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a ferromagnetic pole in a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 7 is a sectional view schematically showing the structure of a stator in a hybrid excitation disc motor according to an embodiment of the present invention;
fig. 8 is an exploded view schematically showing the structure of a stator in a hybrid excitation disc motor according to an embodiment of the present invention;
FIG. 9 schematically illustrates a path diagram of electrically excited magnetic flux in a hybrid excitation disc motor in accordance with an embodiment of the present invention;
fig. 10 is a schematic sectional view showing the structure of a rotor in a hybrid excitation disc motor according to another embodiment of the present invention;
fig. 11 is a schematic view showing a structure of a rotor core in a hybrid excitation disc motor according to another embodiment of the present invention;
fig. 12 is an exploded view schematically showing the structure of a stator in a hybrid excitation disc motor according to another embodiment of the present invention;
fig. 13 schematically illustrates a path diagram of an electrically excited magnetic flux in a hybrid excitation disc motor according to another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 13, an embodiment of the present invention provides a hybrid excitation disc type motor 1, including a rotor 11 and a stator 12, which are arranged along an axial direction (as shown in a in fig. 1) of the motor 1, the rotor 11 is disposed at two sides of the stator 12, a permanent magnetic flux exists between the rotor 11 and the stator 12, the stator 12 includes an electric excitation assembly 14, the electric excitation assembly 14 is capable of generating an electric excitation flux (as shown by a dotted line in fig. 9 and 13) for adjusting a magnetic field, and long yoke portions 1302 and short yoke portions 1303 are uniformly spaced on the rotor 11 along a circumferential direction of the rotor 11 for forming a flux path, wherein,
the electric excitation magnetic flux generated by the electric excitation assembly 14 can sequentially pass through the long yoke part 1302 of the rotor 11 on one side, the rotor 11, the air gap (shown as P in fig. 1) between the rotor 11 and the stator 12, the air gap between the other rotor 11 and the stator 12, the short yoke part 1303 of the other rotor 11, the other rotor 11 and the long yoke part 1302 of the other rotor 11 and then return to the electric excitation assembly 14, so that a complete magnetic path of the electric excitation magnetic flux is formed.
That is, the hybrid excitation disc type motor 1 mainly comprises a rotor 11 and a stator 12, and further comprises a housing 10 and a motor shaft 101 for mounting the stator 12 and the rotor 11, wherein the housing 10 is provided with cover plates 100 at two ends thereof along an axial direction (as shown in a direction of fig. 1) of the motor 1 for closing the housing 10, the rotor is fixedly mounted on the motor shaft 101 and can rotate together with the motor shaft 101, and the stator 12 is fixedly mounted in the housing 10.
Specifically, referring to fig. 1, in the present embodiment, the motor 1 is a dual-rotor single-stator disc motor, the rotor 11 is disposed on both sides of the stator 12, an air gap P exists between the rotor 11 and the stator 12, and the permanent magnet component between the stator 12 and the rotor 11 can form a permanent magnet flux through the air gap P. In the prior art, the magnetic field of the permanent magnetic flux is basically constant, the constant-voltage power generation of the motor is difficult to maintain along with the change of the rotating speed of the motor and the fluctuation of a load during the operation, and the air gap magnetic field between the rotor and the stator cannot be adjusted, so that the situation with higher power quality requirement cannot be met.
In order to solve the problem, referring to fig. 1 and fig. 9 and 13, in the present embodiment, an electric excitation assembly 14 is disposed on the stator 12, the electric excitation assembly 14 can generate an electric excitation magnetic flux for adjusting a magnetic field, and the electric excitation magnetic flux generated by the electric excitation assembly 14 can sequentially pass through the air gap between the one rotor 11, the rotor 11 and the stator 12, the air gap between the other rotor 11 and the stator 12, and the other rotor 11 and then return to the electric excitation assembly 14, so as to form a complete magnetic path of the electric excitation magnetic flux.
That is, by providing the electric field assembly 14 on the stator 12, the electric field magnetic flux can be generated by passing a current through the electric field assembly 14, the electric field magnetic flux can pass through the air gap between the rotor 11 and the stator 12, and the magnetic field direction of the electric field magnetic flux can be changed by changing the current direction in the electric field assembly 14. When the magnetic field direction of the electric excitation magnetic flux is the same as that of the permanent magnetic flux, the electric excitation magnetic flux can increase the magnetic field strength of the air gap, and when the magnetic field direction of the electric excitation magnetic flux is opposite to that of the permanent magnetic flux, the electric excitation magnetic flux can weaken the magnetic field strength of the air gap, so that the adjustment of the air gap magnetic field is realized, the magnetization or demagnetization of the magnetic field in the air gap between the stator 12 and the rotor 11 in the motor 1 is further realized, and the motor 1 can keep the output end voltage stable when the load and the rotating speed change.
Further, referring to fig. 2 to 13, in the present embodiment, long yoke portions 1302 and short yoke portions 1303 are provided on the rotor 11 at regular intervals along the circumferential direction of the rotor 11 for forming a magnetic flux path, wherein the electric excitation magnetic flux generated by the electric excitation assembly 14 can sequentially pass through the long yoke portion 1302 of the rotor 11 on one side, the rotor 11, an air gap (shown as P in fig. 1) between the rotor 11 and the stator 12, an air gap between the other rotor 11 and the stator 12, the short yoke portion 1303 of the other rotor 11, and the long yoke portion 1302 of the other rotor 11 and then return to the electric excitation assembly 14, so as to form a complete magnetic path of the electric excitation magnetic flux.
That is, in order to guide the electromagnetic field flux to stably and effectively form a complete magnetic circuit inside the motor, the long yoke portion 1302 and the short yoke portion 1303 are uniformly spaced on the rotor 11, wherein the electromagnetic field flux generated by the electromagnetic field assembly 14 can penetrate through the air gap between the stator 12 and the rotor 11 on one side and enter the rotor 11 through the long yoke portion 1302 of the rotor 11 after being emitted from the electromagnetic field assembly 14.
The electrically excited magnetic flux enters the rotor 11 and radiates in the radial direction, then enters the stator 12 through an air gap, passes through the stator 12, then enters the short yoke part 1303 of the rotor 11 on the other side from the air gap between the stator 12 and the rotor 11 on the other side, then returns to the long yoke part 1302 on the rotor 11 in the radial direction after walking a pole pitch in the circumferential direction of the rotor 11, and returns to the electrically excited magnetic assembly 14 through the air gap to form a closed loop. By adopting the structure that the long yoke parts 1302 and the short yoke parts 1303 are alternately arranged on the rotor 11, the electric excitation assembly 14 can be arranged on the stator, and a main magnetic flux path of permanent magnet and an auxiliary magnetic flux path of electric excitation can be fully utilized in a limited space, so that a brushless mixed excitation mode is realized.
By adopting the technical scheme, the electric excitation assembly is arranged on the stator, so that the magnetization or demagnetization of the magnetic field in the air gap of the motor is realized, and the motor keeps the voltage of the output end stable when the load fluctuation and the rotating speed change. Meanwhile, the rotor is provided with a structure that the long yoke parts and the short yoke parts are alternated at intervals, so that an electric excitation assembly arranged on the stator can form an electric excitation magnetic circuit through the long yoke parts and the short yoke parts, the motor shape is flattened, the electric excitation assembly is favorably applied to special space occasions, a main magnetic flux path of permanent magnets and an auxiliary magnetic flux path of electric excitation can be fully utilized in a limited space, and the adjustment of an air gap magnetic field is realized in a brushless mixed excitation mode.
Further, referring to fig. 2-3, 9-10, and 13, in the present invention, the long yoke portion 1302 is provided with the ferromagnetic pole 132. The ferromagnetic pole 132 can generate electromagnetic induction under the action of the electromagnetic excitation flux generated by the electromagnetic excitation assembly 14, so that the ferromagnetic pole 132 has magnetism equal to the intensity of the electromagnetic excitation flux, that is, the ferromagnetic pole 132 has magnetism chargeable property, the electromagnetic excitation flux generated by the electromagnetic excitation assembly 14 can stably and reliably enter the long yoke 1302 of the rotor 11 through the ferromagnetic pole 132, and meanwhile, the electromagnetic excitation flux entering the rotor 11 after passing through the stator 12 can also return to the electromagnetic excitation assembly 14 through the ferromagnetic pole 132. In this embodiment, the ferromagnetic pole 132 is made of any one of a soft magnetic material (SMC), a silicon steel material, and an amorphous material, and in other embodiments, the ferromagnetic pole may have other structures.
Referring to fig. 2-13, in the present embodiment, the rotor 11 includes a rotor core assembly 13, and the rotor core assembly 13 includes: a rotor core 130 provided with rotor slots 1300, the rotor slots 1300 being uniformly spaced along a circumferential direction (indicated by direction T in fig. 2) of the rotor core 130; the rotor permanent magnets 131 are disposed in the rotor slots 1300 in the radial direction (R direction in fig. 2) of the rotor core 130, wherein the rotor yokes 1301 at the bottom of the rotor slots 1300 extend in the radial direction of the rotor core 130 to form long yoke portions 1302, and the rotor yokes 1301 adjacent to the long yoke portions 1302 form short yoke portions 1303 in the circumferential direction of the rotor core 130.
That is, the core assembly 13 of the rotor 11 is mainly composed of the rotor core 130 and the rotor permanent magnets 131, wherein the rotor core 130 is provided with rotor slots 1300, the rotor slots 1300 are arranged along the radial direction of the rotor core 130 and are uniformly arranged along the circumferential direction of the rotor core 130, adjacent rotor slots 1300 are spaced apart by T-shaped steps 1304, and the rotor permanent magnets 131 are radially inserted into the rotor slots 1300 and are defined on the rotor core 130 by the T-shaped steps 1304.
As shown in fig. 2 to 6 and fig. 10 to 11, the rotor yoke 1301 is formed at the bottom of the rotor slot 1300 in the rotor core 130, the long yoke portions 1302 are formed by protruding the end portions of the partial rotor yokes 1301 from the rotor yoke 1301 in the radial direction of the rotor core 130, the long yoke portions 1302 are uniformly arranged in the circumferential direction of the rotor core 130, and the short yoke portions 1303 are formed by keeping the length of the rotor yoke 1301 in the radial direction of the rotor core 130 constant between the adjacent long yoke portions 1302.
That is, the lengths of the short yoke portions 1303 and the long yoke portions 1302 are relative to the length in the radial direction of the rotor core 130, the long yoke portions 1302 are the rotor yokes 1301 having a longer radial length of the rotor core 130, and the short yoke portions 1303 are the rotor yokes 1301 having a shorter radial length of the rotor core 130, wherein the portions of the long yoke portions 1302 longer than the short yoke portions 1303 are used for mounting the ferromagnetic poles 132 and guiding the electromagnetic field flux into the rotor core 130. By alternately arranging the short yoke parts 1303 and the long yoke parts 1302 on the rotor core 130 along the circumferential direction thereof, the transmission of the electromagnetic excitation magnetic flux with the electromagnetic excitation assembly 14 arranged on the stator 12 can be effectively realized, and further, the adjustment of the air gap magnetic field is realized, so that the motor 1 keeps the voltage of the output end stable when the load fluctuation and the rotating speed change. In addition, only the rotor iron core 130 and the rotor permanent magnet 131 are arranged on the rotor 11, and compared with the traditional rotor, the structure of a brush and a slip ring is omitted, so that the reliability and the service life of the rotor are improved, and the failure rate of the rotor is reduced.
Specifically, the present invention is not limited to the case where the end of the long yoke portion 1302 protrudes inward, but may be configured to facilitate the installation of the ferromagnetic pole 132 and to guide the electromagnetic flux into the rotor core 130. Specifically, referring to fig. 2 to 6, in the present embodiment, the protruding end of the long yoke portion 1302 is located inside the rotor core 130 in the radial direction of the rotor core 130. Correspondingly, referring to fig. 7-9, in the present embodiment, the electric excitation assembly 14 is located at the center of the stator 12 and is closely attached to the hole wall of the central hole 125 of the stator 12, the electric excitation magnetic flux generated by the electric excitation assembly 14 can enter the rotor core 130 through the long yoke portion 1302 on the rotor core 130 under the guidance of the ferromagnetic pole 132, and meanwhile, the electric excitation magnetic flux can also return to the electric excitation assembly 14 from the rotor core 130 through the ferromagnetic pole 132 through the long yoke portion 1302 on the rotor core 130, thereby forming a complete magnetic circuit of the electric excitation magnetic flux.
Specifically, referring to fig. 10 to 13, in another embodiment of the present invention, the protruding end of the long yoke portion 1302 is located outside the rotor core 130 in the radial direction of the rotor core 130. Correspondingly, the electric excitation assembly 14 is also located outside the stator 12, the electric excitation magnetic flux generated by the electric excitation assembly 14 can enter the rotor core 130 through the long yoke portion 1302 on the rotor core 130 under the guidance of the ferromagnetic poles 132, and meanwhile, the electric excitation magnetic flux can also return to the electric excitation assembly 14 from the rotor core 130 through the ferromagnetic poles 132 through the long yoke portion 1302 on the rotor core 130, so as to form a complete magnetic circuit of the electric excitation magnetic flux.
Further, referring to fig. 2 to 3, 9 to 10, and 13, in the present invention, a ferromagnetic pole 132 is provided at one end of the long yoke portion 1302 in a radial direction of the rotor core 130, and a first support block 133 is provided between the ferromagnetic pole 132 and the rotor permanent magnet 131.
That is, the ferromagnetic pole 132, the first support block 133 and the rotor permanent magnet 131 are sequentially arranged on the long yoke portion 1302 along the radial direction of the rotor core 130, the rotor permanent magnet 131 is arranged in the rotor slot 1300, steps are arranged on two sides of the rotor permanent magnet 131 in the circumferential direction of the rotor core 130, and the protruding wing portions on two sides of the T-shaped step 1304 can press the steps on two sides of the rotor permanent magnet 131, so that the rotor permanent magnet 131 is stably installed in the rotor slot 1300. The first support blocks 133 are disposed between the ferromagnetic poles 132 and the rotor permanent magnets 131, the first support blocks 133 are made of a non-magnetic material, the ferromagnetic poles 132 of different sizes can be disposed by disposing the first support blocks 133 of different sizes, and the area of the ferromagnetic poles 132 receiving the electrical excitation magnetic flux can be changed by replacing the ferromagnetic poles 132 of different sizes, thereby changing the magnetic path of the electrical excitation magnetic flux and the intensity of the electrical excitation magnetic flux entering the rotor core 130.
Meanwhile, in order to enable the rotor permanent magnets 131 on the short yoke portions 1303 to be stably mounted in the rotor slots 1300, as shown in fig. 2-3, 9-10, and 13, in the present invention, one end of the short yoke portions 1303 is provided with a second supporting block 134 for maintaining correspondence with the protruding end of the long yoke portion 1302 in the radial direction of the rotor core 130. The second supporting block 134 is made of a non-magnetic material, and the position of the rotor permanent magnet 131 can be limited by the second supporting block 134, and meanwhile, the gap between the short yoke portion 1303 and the long yoke portion 1302 can be supplemented, so that the whole rotor 11 is more complete.
Further, in order to enable the first support blocks 133, the second support blocks 134, and the ferromagnetic poles 132 to be stably and reliably disposed on the yoke portion 1302, referring to fig. 2 to 3, 9 to 10, and 13, in the present invention, the pressing blocks 135 are disposed between the first support blocks 133 and the second support blocks 134 along the circumferential direction of the rotor core 130, and the pressing blocks 135 are disposed along the radial direction of the rotor core 130 for pressing the ferromagnetic poles 132, the first support blocks 133, and the second support blocks 134.
Specifically, the pressing block 135 is made of a non-magnetic material, wherein, in the circumferential direction of the rotor core 130, steps 137 similar to the structures on the two sides of the ferromagnetic pole 132 are respectively disposed on the two sides of the first supporting block 133 and the second supporting block 134, the pressing block 135 is a T-shaped pressing block, and the protruding wing portions on the two sides of the pressing block 135 can press the ferromagnetic pole 132, the first supporting block 133, and the second supporting block 134, so that the first supporting block 133, the second supporting block 134, and the ferromagnetic pole 132 can be stably and reliably mounted on the long yoke portion 1302.
Further, referring to fig. 2-3 and 10, in the present invention, the rotor 11 further includes a mounting plate 110 for mounting the assembled rotor core assembly 13. By installing the rotor core assembly 13 in the installation plate 110, the rotor core assembly 13 can be installed more compactly, and the whole rotor 11 can be ensured to work stably and reliably.
Specifically, referring to fig. 2-3 and 10, in the present invention, the mounting disc 110 includes an inner ring portion 111 and an outer ring portion 112, a mounting cavity 113 for mounting the rotor core assembly 13 is formed between the inner ring portion 111 and the outer ring portion 112, the inner ring portion 111 is provided with a mounting portion 114, the mounting portion 114 protrudes inward along the radial direction of the rotor 11, and the mounting portion 114 is provided with a mounting hole 115 for mounting the rotor 11.
That is, the cavity between the inner ring portion 111 and the outer ring portion 112 of the mounting disc 110 forms a mounting cavity 113 for mounting the rotor core assembly 13, and the rotor core assembly 13 may be directly assembled in the mounting cavity 113, or may be integrally assembled into the mounting cavity 113 after the assembly is completed, so as to form the complete rotor 11, which is convenient for mounting the rotor core assembly 13. Meanwhile, by providing the mounting portion 114 inside the inner ring portion 111, it is convenient to mount the entire rotor 11 on the motor shaft 101.
Further, referring to fig. 7-9 and 12-13, in the present invention, the electric excitation assembly 14 includes a coil assembly 140 and a flux sleeve 141, and the flux sleeve 141 is disposed coaxially with the coil assembly 140 to conduct the electric excitation flux generated by the coil assembly 140.
That is, the electric excitation assembly 14 mainly includes a flux sleeve 141 and a coil assembly 140, wherein the flux sleeve 141 is disposed on the inner side or the outer side of the coil assembly 140, and is disposed coaxially with the coil assembly 140 to conduct the electric excitation magnetic flux generated by the coil assembly 140, so that the electric excitation magnetic flux generated by the coil assembly 140 passes through the air gap and enters the rotor, and the electric excitation magnetic flux generated by the coil assembly 140 can effectively adjust the magnetic field in the air gap.
Specifically, referring to fig. 7-9 and fig. 12-13, in the present invention, the coil assembly 140 includes a coil 142 and an insulating frame 143, the coil 142 is wound on the insulating frame 143, and the flux sleeve 141 and the insulating frame 143 are coaxially disposed. The flux sleeve 141 is installed inside or outside the insulating frame 143, is disposed coaxially with the insulating frame 143, and facilitates installation of the coil 142 by winding the coil 142 around the insulating frame 143.
Further, referring to fig. 1, 7-8 and 12, in the present invention, the stator 12 further includes an armature 120 for generating a permanent magnetic flux, the armature 120 is disposed coaxially with the electric excitation assembly 14, and the permanent magnetic flux generated by the armature 120 and the permanent magnetic flux generated by the rotor 11 constitute a main magnetic flux. The stator 12 is formed by assembling the electro-magnetic assembly 14 and the armature 120, and the structure is simple and the assembly is convenient. In the present embodiment, the armature 120 is a yokeless segmented armature. In other embodiments, the armature may have other structures, and the present invention is not limited to this, as long as the armature and the electrically exciting assembly can form a stator together.
Further, referring to fig. 7 to 8 and 12, in the present invention, the armature 120 includes: the armature plate 121 is provided with armature grooves 122, and the armature grooves 122 are uniformly arranged at intervals along the circumferential direction of the armature plate 121; and an armature core 123 provided with a winding coil 124, wherein the armature plates 121 are located at both ends of the armature core 123, the ends of the armature core 123 are located in the armature slots 122, and the winding coil 124 is located between the armature plates 121.
That is, the armature 120 is mainly composed of armature plates 121 and an armature core 123, a winding coil 124 for forming a stator winding is disposed on the armature core 123, armature slots 122 are uniformly disposed on the armature plates 121 along the circumferential direction of the armature plates 121, the armature plates 121 have two upper and lower pieces, the armature core 123 wound with the winding coil 124 is disposed between the two upper and lower armature plates 121, both end portions of the armature core 123 are respectively inserted into the armature slots 122 of the two upper and lower armature plates 121, and the winding coil 124 is disposed between the armature plates 121. The armature core 123 and the armature plate 121 are stably and reliably assembled together in an inserting mode, assembly is facilitated, meanwhile, the armature plate 121 and the armature core 123 can be designed by installing standard components, production and processing are facilitated, and improvement of assembly efficiency and production efficiency of the stator 12 is facilitated.
It should be noted that, the positions of the electric excitation assembly and the armature in the radial direction of the rotor are not limited in the present invention, and may be reasonably selected according to actual needs, as long as the electric excitation assembly can effectively adjust the magnetic flux in the air gap.
Specifically, referring to fig. 7-8, in the present embodiment, the flux sleeve 141 of the electro-magnetic assembly 14 is closely attached to the wall of the central hole 125 of the armature plate 121, and the coil assembly 140 of the electro-magnetic assembly 14 is located between the armature plates 121.
That is, the electric excitation assembly 14 is located at the center of the armature 120, the flux sleeve 141 is tightly attached to the hole wall of the central hole 125 of the armature plate 121, and the electric excitation magnetic flux generated by the electric excitation assembly 14 can enter the rotor core 130 through the long yoke portion 1302 of the rotor core 130 under the guidance of the ferromagnetic pole 132. Correspondingly, referring to fig. 2 to 6, in the present embodiment, the protruding end of the long yoke portion 1302 is located inside the rotor core 130 in the radial direction of the rotor core 130.
In particular, referring to fig. 10-13, in another embodiment of the present invention, the flux sleeve 141 of the electro-magnetic assembly 14 is closely attached to the outer edge of the armature plate 121, and the coil assembly 140 of the electro-magnetic assembly 14 is located between the armature plates 124.
That is, the electric excitation assembly 14 is also located at the outer side of the stator 12, the upper end and the lower end of the flux sleeve 141 are connected to the outer edge of the armature plate 121, and the electric excitation magnetic flux generated by the electric excitation assembly 14 can enter the rotor core 130 through the long yoke portion 1302 on the rotor core 130 under the guidance of the ferromagnetic pole 132. Correspondingly, referring to fig. 10 to 13, the protruding end of the long yoke portion 1302 is located outside the rotor core 130 in the radial direction of the rotor core 130.
Specifically, referring to fig. 12-13, in another embodiment of the present invention, a protrusion 126 is disposed on the outer edge of the armature plate 121, and grooves 144 are disposed on the upper end and the lower end of the flux sleeve 141, and the grooves 144 are engaged with the protrusion 126. That is to say, the upper end and the lower end of the flux sleeve 141 are clamped with the upper armature plate 121 and the lower armature plate 121 through the engagement of the groove 144 and the protrusion 126, the clamping connection is simple to assemble and is firm to fasten, so that the electric excitation assembly 14 can be stably and reliably assembled with the armature 120 to form the stator 12.
In other embodiments, the electric excitation assembly may be assembled with the armature in other forms, and the present invention is not limited thereto, as long as it is ensured that the electric excitation assembly can be stably and reliably assembled with the armature.
As described above, in the hybrid excitation disc motor provided by the present invention, the stator is provided with the electric excitation assembly to realize the magnetization or demagnetization of the magnetic field in the air gap of the motor, so that the motor keeps the output voltage stable when the load fluctuation and the rotation speed change. Meanwhile, the rotor is provided with a structure that the long yoke parts and the short yoke parts are alternated at intervals, so that an electric excitation assembly arranged on the stator can form an electric excitation magnetic circuit through the long yoke parts and the short yoke parts, the motor shape is flattened, the electric excitation assembly is favorably applied to special space occasions, a main magnetic flux path of permanent magnets and an auxiliary magnetic flux path of electric excitation can be fully utilized in a limited space, and the adjustment of an air gap magnetic field is realized in a brushless mixed excitation mode.
In summary, the above-mentioned embodiments are provided only for illustrating the principles and effects of the present invention, and not for limiting the present invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (19)

1. A hybrid excitation disc motor comprising a rotor and a stator arranged in an axial direction of the motor, the rotor being provided on both sides of the stator, a permanent magnetic flux being present between the rotor and the stator, characterized in that the stator comprises an electric excitation assembly capable of generating an electric excitation flux for adjusting a magnetic field,
long yoke portions and short yoke portions are provided at regular intervals on the rotor along a circumferential direction of the rotor for forming a magnetic flux path, wherein,
the electric excitation magnetic flux generated by the electric excitation assembly can return to the electric excitation assembly after sequentially passing through the long yoke part of the rotor on one side, the rotor, an air gap between the rotor and the stator, an air gap between the other rotor and the stator, the short yoke part of the other rotor, the other rotor and the long yoke part of the other rotor, so that a complete magnetic circuit of the electric excitation magnetic flux is formed.
2. A hybrid excited disc motor as claimed in claim 1, wherein the long yoke portion is provided with ferromagnetic poles.
3. A hybrid exciter disc machine according to claim 1 or claim 2, wherein the rotor comprises a rotor core assembly comprising:
the rotor core is provided with rotor slots, and the rotor slots are uniformly arranged at intervals along the circumferential direction of the rotor core;
rotor permanent magnets disposed in the rotor slots in a radial direction of the rotor core, wherein,
the rotor yoke at the bottom of the rotor slot extends in the radial direction of the rotor core to form the long yoke portion, and the rotor yokes adjacent to the long yoke portion form the short yoke portion in the circumferential direction of the rotor core.
4. The hybrid excitation disc motor according to claim 3, wherein the end portion of the long yoke portion that protrudes is located inside the rotor core in a radial direction of the rotor core.
5. The hybrid excitation disc motor according to claim 3, wherein the end portion of the long yoke portion that protrudes in the radial direction of the rotor core is located outside the rotor core.
6. A hybrid excited disc motor as claimed in claim 3, wherein the long yoke portion is provided at one end thereof with a ferromagnetic pole in a radial direction of the rotor core, and a first support block is provided between the ferromagnetic pole and the rotor permanent magnet.
7. The hybrid excitation disc motor according to claim 6, wherein one end of the short yoke portion is provided with a second support block in a radial direction of the rotor core for retaining correspondence with a protruding end of the long yoke portion.
8. The hybrid excitation disc motor of claim 7, wherein a pressing block is provided between the first support block and the second support block along a circumferential direction of the rotor core, the pressing block being provided along a radial direction of the rotor core for pressing the rotor ferromagnetic pole, the first support block and the second support block.
9. The hybrid excitation disc motor of claim 8 wherein the press block, the first support block and the second support block are all of a non-magnetically conductive material.
10. A hybrid excited disc motor as claimed in claim 3, wherein the rotor further comprises a mounting disc for mounting the assembled rotor core assembly.
11. The hybrid excitation disc motor according to claim 10, wherein the mounting disc includes an inner ring portion and an outer ring portion, a mounting cavity for mounting the rotor core assembly is formed between the inner ring portion and the outer ring portion, the inner ring portion is provided with a mounting portion, the mounting portion protrudes inward in a radial direction of the rotor, and the mounting portion is provided with a mounting hole for mounting the rotor.
12. The hybrid excitation disc motor of claim 1, wherein the electrical excitation assembly includes a coil assembly and a flux sleeve disposed coaxially with the coil assembly for conducting the electrical excitation flux generated by the coil assembly.
13. The hybrid excitation disc motor of claim 12, wherein the coil assembly includes a coil and an insulating bobbin, the coil being wound around the insulating bobbin, the flux sleeve being disposed coaxially with the insulating bobbin.
14. The hybrid excitation disc motor of claim 1, wherein the stator further comprises an armature for generating the permanent magnetic flux, the armature being disposed coaxially with the electric field assembly, the permanent magnetic flux generated by the armature and the permanent magnetic flux generated by the rotor constituting a main magnetic flux.
15. A hybrid excited disc motor as claimed in claim 14, wherein the armature is a yokeless segmented armature.
16. A hybrid exciter disc machine according to claim 14 or 15, wherein the armature comprises:
the armature plate is provided with armature grooves, and the armature grooves are uniformly arranged at intervals along the circumferential direction of the armature plate;
an armature core provided with a winding coil, wherein,
the armature plates are located at two ends of the armature core, the end portions of the armature core are located in the armature grooves, and the winding coils are located between the armature plates.
17. The hybrid excitation disc motor of claim 16, wherein the flux sleeve of the electric field assembly is closely attached to the wall of the central hole of the armature plate, and the coil assembly of the electric field assembly is located between the armature plates.
18. The hybrid excitation disc motor of claim 16, wherein the flux sleeve of the electro-magnetic assembly is flush with the outer edge of the armature plate, and the coil assembly of the electro-magnetic assembly is located between the armature plates.
19. A hybrid exciter disc motor according to claim 18, wherein the armature plate is provided with protrusions on its outer edge, and the flux sleeve is provided with grooves on its upper and lower ends, the grooves engaging with the protrusions.
CN202010877923.0A 2020-08-27 2020-08-27 Mixed excitation disc type motor Pending CN111969821A (en)

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Application Number Priority Date Filing Date Title
CN202010877923.0A CN111969821A (en) 2020-08-27 2020-08-27 Mixed excitation disc type motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010877923.0A CN111969821A (en) 2020-08-27 2020-08-27 Mixed excitation disc type motor

Publications (1)

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CN111969821A true CN111969821A (en) 2020-11-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113037156A (en) * 2021-03-09 2021-06-25 南京航空航天大学 Control method of hybrid excitation generator
CN113595283A (en) * 2021-08-04 2021-11-02 中山大洋电机股份有限公司 Rotor of disc type permanent magnet motor and disc type permanent magnet motor using same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113037156A (en) * 2021-03-09 2021-06-25 南京航空航天大学 Control method of hybrid excitation generator
CN113037156B (en) * 2021-03-09 2022-06-14 南京航空航天大学 Control method of hybrid excitation generator
CN113595283A (en) * 2021-08-04 2021-11-02 中山大洋电机股份有限公司 Rotor of disc type permanent magnet motor and disc type permanent magnet motor using same
CN113595283B (en) * 2021-08-04 2022-07-15 中山大洋电机股份有限公司 Rotor of disc type permanent magnet motor and disc type permanent magnet motor using same

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