WO2023108910A1 - Ensemble rotor, moteur et équipement électrique - Google Patents

Ensemble rotor, moteur et équipement électrique Download PDF

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Publication number
WO2023108910A1
WO2023108910A1 PCT/CN2022/078988 CN2022078988W WO2023108910A1 WO 2023108910 A1 WO2023108910 A1 WO 2023108910A1 CN 2022078988 W CN2022078988 W CN 2022078988W WO 2023108910 A1 WO2023108910 A1 WO 2023108910A1
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WO
WIPO (PCT)
Prior art keywords
stator
magnetic
rotor
yoke
teeth
Prior art date
Application number
PCT/CN2022/078988
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English (en)
Chinese (zh)
Inventor
李文瑞
葛梦
冯艳丽
Original Assignee
威灵（芜湖）电机制造有限公司
美的威灵电机技术（上海）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202123185293.XU external-priority patent/CN216356170U/zh
Priority claimed from CN202111550871.7A external-priority patent/CN114172290A/zh
Priority claimed from CN202123183375.0U external-priority patent/CN216356169U/zh
Priority claimed from CN202111550908.6A external-priority patent/CN114069924A/zh
Application filed by 威灵（芜湖）电机制造有限公司, 美的威灵电机技术（上海）有限公司 filed Critical 威灵（芜湖）电机制造有限公司
Publication of WO2023108910A1 publication Critical patent/WO2023108910A1/fr

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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H02K1/27915—Magnets shaped to vary the mechanical air gap between the magnets and the stator
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • the present application relates to the technical field of motors, in particular, to a rotor assembly, a motor and electrical equipment.
  • the amount of permanent magnets used in the permanent magnet motor is large, and the cost is relatively high.
  • the number of permanent magnet blocks is large, and the assembly process takes a long time, which affects the manufacturing efficiency.
  • the related technology adopts an alternating pole structure, and replaces all N-pole permanent magnets or S-pole permanent magnets in the original motor with permeable magnetic cores, so that the amplitude of the fundamental wave drops significantly, and the output performance of the motor will decrease.
  • the external rotor motor is mostly a surface-mounted permanent magnet motor structure, which is simple in structure and easy to manufacture.
  • the amount of permanent magnets used in this motor structure is large, and the cost is high.
  • the number of permanent magnet blocks is large, and the assembly process takes a long time, which affects the manufacturing efficiency.
  • the related technology adopts the alternating pole structure, that is, all the N-pole permanent magnets or S-pole permanent magnets in the original motor are replaced with magnetic cores. Under this design, the gap between two N-pole permanent magnets or S-pole permanent magnets
  • the magnetically permeable material will be magnetized into S pole or N pole by adjacent permanent magnet poles, forming an alternating pole structure.
  • due to the asymmetry of the air gap flux density under the magnetic poles of the alternating pole structure a large number of even harmonics will be introduced, resulting in asymmetric back EMF, which will cause large torque ripple and affect the reliability of the motor operation.
  • the first aspect of the present application provides a rotor assembly, including: a magnetically permeable hub frame, the magnetically permeable hub frame includes an end cover and an annular yoke, the end cover is connected to one axial end of the annular yoke, and the annular yoke
  • the inner peripheral wall is provided with a plurality of accommodation parts, and the plurality of accommodation parts are distributed along the circumferential direction of the annular yoke; a plurality of permanent magnets are respectively arranged in the plurality of accommodation parts, and the polarities of the plurality of permanent magnets are the same.
  • the rotor assembly proposed in this application includes a magnetically permeable hub frame and a plurality of permanent magnets.
  • the magnetically permeable hub frame includes a connected end cover and an annular yoke; the end cover is connected to one end of the annular yoke in the axial direction, and the inner peripheral wall of the annular yoke is provided with a plurality of accommodation parts, and the plurality of accommodation parts are arranged along the ring
  • the circumferential direction of the yoke is distributed; a plurality of permanent magnets are respectively arranged in a plurality of accommodating parts.
  • the polarities of the multiple permanent magnets in the rotor assembly proposed by the present application are the same.
  • the magnetically permeable hub frame is made of magnetically permeable materials.
  • the magnetically permeable hub frame includes a connected end cover portion and an annular yoke portion, and the overall structure of the magnetically permeable hub frame is simple.
  • a plurality of accommodating portions are provided directly on the inner peripheral wall of the annular yoke, and it is ensured that the a plurality of accommodating portions are distributed along the circumferential direction of the annular yoke.
  • the magnetically permeable hub frame in the rotor assembly proposed by this application includes an annular yoke and an end cover connected to the axial end of the annular yoke, which improves the overall structural strength of the magnetically permeable hub frame;
  • the inner peripheral wall of the annular yoke is provided with A plurality of accommodation parts, the plurality of accommodation parts are distributed along the circumferential direction of the annular yoke, and a plurality of permanent magnets with the same polarity are arranged in the plurality of accommodation parts, and a magnetic structure of alternating poles is produced on the annular yoke, thereby reducing the
  • the number of permanent magnets used reduces the manufacturing difficulty of the alternating-stage rotor, enhances the magnetic field modulation effect, increases the amplitude of the working sub-harmonic, and produces better output performance.
  • the magnetically permeable hub frame further includes: a protrusion disposed on the inner peripheral wall of the annular yoke and protruding toward the middle of the annular yoke, and the accommodation portion is located between two adjacent protrusions.
  • the magnetically permeable hub frame also includes protrusions.
  • the protruding part is arranged on the inner peripheral wall of the annular yoke part, and protrudes toward the middle part of the circular yoke part; a receiving part is formed between two adjacent protruding parts, on the basis of this application, a plurality of poles
  • the permanent magnets with the same property are arranged in the plurality of accommodation parts. In this way, the protrusions and the permanent magnets are alternately distributed in the circumferential direction of the annular yoke, thereby forming an alternating pole structure.
  • the rotor assembly cooperates with the design of the pole logarithm of the stator and rotor magnetic fields, and uses the magnetic density harmonics to work, avoiding the problem of output performance degradation caused by the decrease in the amplitude of the magnetic density fundamental wave after using alternating poles.
  • the alternating pole structure decreases, the amplitude of the fundamental wave of the air-gap magnetic field decreases, and the output performance of the motor decreases.
  • This application adopts the structure of the magnetic field modulation motor, that is, the rotor assembly proposed in this application is applied to the magnetic field modulation motor, which uses harmonics to work, enhances the modulation effect through the salient pole rotor, increases the working harmonic content, and thus improves the output performance of the motor. Avoid the problem that the amplitude of the fundamental wave of the alternating pole structure decreases and the performance of the motor decreases.
  • the thickness of the protrusion is equal to the thickness of the annular yoke.
  • the thickness of the protruding part is equal to that of the annular yoke, so that the protruding part and the annular yoke can be stretched and formed from the same sheet material, which has a simple structure and reduces manufacturing difficulty. Moreover, this setting makes the overall structural strength of the magnetically permeable hub frame high and has a longer service life.
  • the number of permanent magnets is equal to the number of protrusions.
  • the number of permanent magnets is equal to the number of protrusions. In this way, on the basis of ensuring that the protruding parts and the permanent magnets are alternately distributed, it is also ensured that each permanent magnet can be placed in the accommodating part. Moreover, the number of permanent magnets is equal to the number of protrusions, which ensures a simpler structure of the magnetically permeable hub frame, reduces the processing difficulty of the magnetically permeable hub frame, and improves the processing efficiency of the magnetically permeable hub frame.
  • the number of the receiving parts for placing the permanent magnets is also consistent with the number of the protruding parts, so that the ring-shaped yoke can be stretched and formed with an integral sheet material, which has a simple structure, reduced manufacturing difficulty, and high strength of the rotor assembly.
  • the end cap portion and the annular yoke portion are of one-piece construction.
  • the end cover part and the annular yoke part have an integrated structure, so that the connection between the end cover part and the annular yoke part does not require additional assembly parts, thereby reducing the difficulty of assembly.
  • the one-piece end cap and ring yoke have higher structural strength and longer service life.
  • the existence of the air gap can effectively reduce the flux leakage between the permanent magnet and the inner wall of the containing cavity, and the magnetization effect of the permanent magnet on the protrusion is better. Furthermore, the existence of the air gap can reduce the difficulty of assembly, thereby improving the reliability of the operation of the rotor assembly.
  • the size of the air gap is larger than 0 mm and smaller than 3 mm in the circumferential direction of the annular yoke.
  • the size of the air gap affects the operational reliability of the entire rotor assembly.
  • the air gap is too large, the reluctance will increase, thereby increasing the excitation loss and reducing the magnetization effect of the permanent magnet on the protrusion. , and thus cannot produce an alternating pole structure.
  • the air gap harmonic magnetic field will increase, and the permanent magnet will easily collide with the inner wall of the housing cavity during operation, thereby reducing the operating reliability and bringing difficulties to assembly.
  • the size of the air gap is set to be larger than 0mm and smaller than 3mm. In this way, the reluctance can be kept within an appropriate range, the permanent magnet has the best magnetization effect on the protruding part, and the assembly difficulty can be reduced, thereby improving the operation reliability.
  • an included angle ⁇ is formed between the center of the annular yoke and the line connecting the two ends of the permanent magnet, and satisfies 0.9 ⁇ /( ⁇ /(P_r)) ⁇ 1.7, where P_r is the permanent magnet quantity.
  • an included angle ⁇ is formed between the center of the annular yoke and the two ends of the permanent magnet.
  • the existence of the included angle can further change the air gap permeance process, enhance the magnetic field modulation effect, and work sub-harmoniously.
  • the amplitude of the wave increases, which further improves the torque of the motor using the secondary rotor assembly, thus avoiding the reduction in the number of magnetic poles after the use of alternating poles in traditional permanent magnet motors, and the decrease in the amplitude of the fundamental wave of the magnetic field, resulting in torque drop problem.
  • the permanent magnets include one of: ferrite or rare earth permanent magnets;
  • ferrite can be used as the permanent magnet, and the magnetic permeability of the rare earth permanent magnet is better.
  • the permanent magnet can also be a rare-earth permanent magnet, which has extremely high magnetic energy.
  • the protrusion comprises a spline surface disposed towards the middle of the annular yoke.
  • the protruding part includes a spline surface, and the spline surface is arranged towards the middle of the annular yoke, and the spline surface is integrally formed, thereby reducing the difficulty of processing.
  • the spline surface in the circumferential direction of the annular yoke, includes a plurality of connected sub-spline surfaces, and the sub-spline surfaces include planes and/or arc surfaces.
  • the spline surface in the circumferential direction of the annular yoke, includes a plurality of connected sub-spline surfaces, and the smooth connection between each section makes the curvature of the overall spline surface formed by them consistent, thereby making the rotor assembly Lower energy consumption during operation.
  • Sub-spline surfaces include planar and/or curved surfaces, allowing for closer curvature between segments.
  • a motor including: a rotor assembly as in any of the above possible designs, a stator assembly, at least a part of the stator assembly is located in the rotor assembly.
  • the motor proposed in the second aspect of the present application includes: the rotor assembly in any of the above possible designs, and therefore has all the beneficial effects of the rotor assembly in any of the above possible designs.
  • the motor further includes a stator assembly, and at least a part of the stator assembly is located in the rotor assembly.
  • the motor When the motor is working, the motor is energized, the stator assembly generates a rotating magnetic field, the rotor assembly is cut by the magnetic force lines in the rotating magnetic field to generate current, and the current is transmitted to the end in the motor, so that the motor can output current.
  • the protruding structure of the protruding part on the rotor enhances the air-gap permeance effect, enhances the modulation effect, increases the amplitude of the working sub-harmonic, and further improves the motor torque. , which in turn produces a greater driving torque and can generate a stronger driving force.
  • the stator assembly includes: a stator core, and the stator core includes: a yoke; the stator main teeth are arranged on the yoke, and the stator main teeth include tooth shoes, and there is a stator between two adjacent stator main teeth.
  • the slot has a notch between two adjacent tooth shoes, and the notch communicates with the stator slot; the stator winding is arranged on the main teeth of the stator and is located in the stator slot.
  • the stator assembly includes: stator core, stator main teeth and stator windings, and the stator core includes a yoke, which serves not only as the main magnetic circuit of the stator, but also as a mounting and fixing part for the stator main teeth and stator windings.
  • stator main teeth are arranged on the yoke, and then fixed by the yoke, the stator main teeth include tooth shoes, and there are stator slots between two adjacent stator main teeth, so that there are two adjacent stator main teeth. interval, and the stator slot can play a role of accommodation. There is a notch between two adjacent tooth shoes, and the notch communicates with the stator slot. In this way, through the arrangement of the stator slots and notches, the starting torque of the motor is reduced, the waveform of the air-gap magnetic field is improved, and additional loss is reduced.
  • stator winding in the stator assembly is arranged on the main teeth of the stator and located in the stator slot, the stator winding is the input circuit part of the motor, and an alternating magnetic field is generated by feeding an alternating current.
  • the stator core also includes at least two stator auxiliary teeth, which are arranged on the tooth shoe.
  • the stator auxiliary teeth are used as magnetic conductive parts for magnetic conduction.
  • the stator auxiliary teeth can also be used as modulation parts to realize The role of magnetic field modulation.
  • the size of the groove is not equal to the size of the notch, that is, the width of the groove between two adjacent stator auxiliary teeth is the same as that between two adjacent tooth shoes.
  • the slot widths of the stator slots are not equal.
  • the tooth body bisector of one stator auxiliary tooth forms an angle ⁇ with the tooth body bisector of the other stator auxiliary tooth, and satisfies 1 ⁇ /( 2 ⁇ /(ax)) ⁇ 1.4, wherein, a represents the number of stator main teeth, and x represents the number of stator auxiliary teeth on each stator main tooth.
  • an angle ⁇ is formed between the tooth body bisector of one stator auxiliary tooth and the tooth body bisector of the other stator auxiliary tooth. The existence of the angle ⁇ makes the motor Modulation generates harmonic amplitudes with a certain torque.
  • the included angle ⁇ satisfies the formula 1 ⁇ /(2 ⁇ /(ax)) ⁇ 1.4, wherein a represents the number of main stator teeth, and x represents the number of auxiliary stator teeth on each main stator tooth.
  • a represents the number of main stator teeth
  • x represents the number of auxiliary stator teeth on each main stator tooth.
  • the tooth body bisector of the stator auxiliary teeth is: on the outer circumference of the stator iron core, the middle part of the stator auxiliary teeth and the center of the stator iron core.
  • an electrical device including: a motor in any possible design above.
  • the electrical equipment proposed in another aspect of the present application includes the motor in any of the above-mentioned possible designs, and therefore has all the beneficial effects of the motor in any of the above-mentioned possible designs, which will not be repeated here.
  • the application provides a rotor assembly, including: a first rotor core, the first rotor core includes a first yoke and a plurality of first salient poles, the plurality of first salient poles are set On the first yoke, a first installation groove is formed between adjacent first salient poles; a plurality of first magnetic parts, the first magnetic parts are arranged in the first installation groove; the second rotor iron core, along the first rotor iron The axial direction of the core is arranged on one side of the first rotor core.
  • the second rotor core includes a second yoke and a plurality of second salient poles.
  • the plurality of second salient poles are arranged on the second yoke. Adjacent A second installation groove is formed between the second salient poles; a plurality of second magnetic parts are arranged in the second installation groove, wherein the first magnetic parts are arranged correspondingly to the second salient poles.
  • the rotor assembly proposed by the present application includes a first rotor core and a second rotor core, wherein the first yoke of the first rotor core is provided with a plurality of first salient poles, and the adjacent first salient poles
  • the first installation groove is formed between them, the first magnetic member is arranged in the first installation groove, and then the first salient poles and the first magnetic members are alternately surrounded to form a ring structure, and then the first salient poles are magnetized by the first magnetic member, Both the first salient pole and the first magnetic member have magnetism.
  • a plurality of second salient poles are arranged on the second yoke of the second rotor core, and a second installation is formed between adjacent second salient poles.
  • the second magnetic part is arranged in the second installation groove, and then the second salient pole and the second magnetic part alternately surround a ring structure, and then the second salient pole is magnetized by the second magnetic part, so that the second salient pole Both the magnetic part and the second magnetic part have magnetism, thereby reducing the investment of the first magnetic part and the second magnetic part by half, thereby reducing the production cost.
  • first rotor core and the second rotor core are axially stacked, and the first magnetic part is arranged corresponding to the second salient pole, so that the first magnetic part, the first salient pole, the second magnetic part and the second magnetic part can be adjusted.
  • the magnetic field formed by the salient poles makes the magnetic field formed by the rotor assembly more uniform, suppresses the influence of even harmonics, and reduces the magnetic field torque and torque fluctuation of the motor.
  • the second magnetic member is arranged correspondingly to the second salient pole.
  • the first magnetic part corresponds to the setting of the second salient pole
  • the second magnetic part corresponds to the setting of the second salient pole, so that the first magnetic part, the first salient pole, the second magnetic part and the second magnetic part can be further adjusted.
  • the magnetic field formed by the two salient poles makes the magnetic field formed by the rotor assembly more uniform, further suppresses the influence of even harmonics, and further reduces the magnetic field torque and torque fluctuation of the motor.
  • the magnetization polarities of all the first magnetic parts are the same; the magnetization polarities of all the second magnetic parts are the same; the magnetization polarities of the first magnetic parts and the magnetization polarities of the second magnetic parts are opposite .
  • the magnetization polarities of all the first magnetic parts are the same, and the magnetization polarities of all the second magnetic parts are the same, and the magnetization polarities of the first magnetic parts and the magnetization polarities of the second magnetic parts are opposite, That is, if the first magnetic piece is S pole, then the second magnetic piece is N pole, if the first magnetic piece is N pole, then the second magnetic piece is S pole, and the polarity after the first salient pole is magnetized is the same as that of the first salient pole.
  • the first magnetic part is also opposite, and the polarity of the second salient pole after being magnetized is also opposite to that of the second magnetic part, and then in the axial direction of the rotor assembly, the first salient pole of the same polarity and the second magnetic part are collinear and have the same polarity.
  • the second salient pole and the second magnetic part are collinear, so that the overall magnetic field formed by the rotor assembly is more uniform, so that the induced counter electromotive force generated by the first magnetic part and the second magnetic part on the winding armature in the axial direction differs by 180 °, so as to further suppress the influence of even harmonics, and further reduce the motor magnetic field torque and torque ripple.
  • the difference between the first rotor core and the second rotor core is an odd number of pole pitches.
  • the difference between the first rotor core and the second rotor core is an odd number of pole pitches, which makes the magnetic field generated by the rotor assembly more regular, thereby further suppressing the influence of even-order harmonics and further reducing the magnetic field rotation of the motor. torque and torque fluctuations.
  • the axial lengths of the first rotor core and the second rotor core are equal.
  • the length of the first rotor core is equal to the length of the second rotor core, so that in the axial direction of the rotor assembly, the magnetic field generated by the first magnetic part and the second
  • the symmetry of the magnetic field generated by the magnetic parts further makes the magnetic field generated by the rotor assembly more uniform, thereby further suppressing the influence of even harmonics and further reducing the magnetic field torque and torque fluctuation of the motor.
  • first gap between adjacent first magnetic pieces and first salient poles; and/or there is a second gap between adjacent second magnetic pieces and second salient poles .
  • adjacent first magnetic parts and first salient poles are spaced apart to form a first gap, through which the leakage magnetic flux at the end of the first salient pole on the adjacent first magnetic part is reduced , thereby increasing the working magnetic flux formed by the first salient pole in the main magnetic circuit to improve the output performance of the motor.
  • Adjacent second magnetic parts and second salient poles are spaced apart to form a second gap, and through the second gap, the leakage magnetic flux at the end of the second salient pole on the adjacent second magnetic parts is reduced, thereby increasing the second
  • the working magnetic flux formed by salient poles in the main magnetic circuit improves the output performance of the motor.
  • the width of the first gap is less than or equal to 3mm; and/or the width of the second gap is less than or equal to 3mm.
  • the width of the first gap is less than or equal to 3mm, and the distance between the adjacent first magnetic member and the first salient pole is less than or equal to 3mm, thereby ensuring the magnetic field strength and the output performance of the motor.
  • the width of the second gap is less than or equal to 3mm, and the distance between the adjacent second magnetic member and the second salient pole is less than or equal to 3mm, thereby ensuring the magnetic field strength and the output performance of the motor.
  • the angle of the central angle occupied by the first magnetic part and the second magnetic part is ⁇
  • the number of pole pairs of the second rotor formed by the second rotor core and the second magnetic member is Pr, wherein, 0.9 ⁇ ( ⁇ Pr) ⁇ 1.7.
  • the angle of the central angle occupied by the first magnetic part and the second magnetic part is ⁇ , and the existence of the included angle can increase the magnetomotive force of the motor, improve the modulation effect of the magnetic field, and increase the frequency of the working subharmonic
  • the amplitude ensures the torque of the motor, which also avoids the problem that the number of magnetic poles decreases after the use of alternating poles in the motor, and the amplitude of the fundamental wave of the magnetic field decreases, resulting in a decrease in torque.
  • first yoke and the first salient pole are integrated; and/or the second yoke and the second salient pole are integrated.
  • the first yoke and the first salient pole are of an integrated structure, and only the first magnetic part needs to be installed during installation, thereby reducing installation difficulty and improving production efficiency.
  • the second yoke and the second salient pole are of an integral structure, and only need to install the second magnetic part during installation, thereby reducing installation difficulty and improving production efficiency.
  • a plurality of first magnetic elements form a Halbach array; and/or a plurality of second magnetic elements form a Halbach array.
  • multiple first magnetic parts form a Halbach array, thereby improving the sinusoidality of the magnetic field generated by the first magnetic parts and improving the efficiency of the motor.
  • a plurality of second magnetic parts form a Halbach array, thereby improving the sinusoidality of the magnetic field generated by the second magnetic parts and improving the efficiency of the motor.
  • first magnetic member and the second magnetic member have the same structure; and/or the first salient pole and the second salient pole have the same structure.
  • the structure of the first magnetic part is the same as that of the second magnetic part, and then the magnetic fields generated by the first magnetic part and the second magnetic part are similar or identical, so that the overall magnetic field of the rotor assembly is more uniform, making the rotor assembly
  • the formed magnetic field is more uniform, the influence of even harmonics is suppressed, and the magnetic field torque and torque fluctuation of the motor are reduced.
  • the structure of the first salient pole is the same as that of the second salient pole, and the magnetic fields generated by the magnetization of the first salient pole and the second salient pole are similar or the same, which makes the overall magnetic field of the rotor assembly more uniform, so that the rotor assembly forms The magnetic field is more uniform, the influence of even harmonics is suppressed, and the magnetic field torque and torque fluctuation of the motor are reduced.
  • the first rotor core includes a plurality of first iron core segments, and the plurality of first iron cores are spliced into a ring shape;
  • the second rotor core includes a plurality of second iron core segments , a plurality of second iron cores are spliced into a ring shape.
  • the first rotor core includes a plurality of first core segments, and the plurality of first core segments are connected end to end along the circumferential direction of the first rotor core.
  • any first iron core segment includes a first yoke and at least one first salient pole, and the partial yokes of two adjacent first iron core segments are connected to form a ring structure.
  • a plurality of first core blocks can be connected end to end to manufacture the rotor core.
  • the first rotor core includes a plurality of first core segments.
  • the first rotor iron core can be unfolded first, and can be unfolded into one piece, or can be unfolded into a single first iron core block. Then, assemble the first magnetic part at the corresponding position on each first iron core block. In this way, the installation difficulty of the first magnetic part and the first rotor core can be reduced, and the production efficiency can be improved.
  • materials can be saved and costs can be reduced.
  • the second rotor core includes a plurality of second core segments connected end to end along the circumferential direction of the second rotor core.
  • any first iron core block includes a second yoke and at least one second salient pole, and the partial yokes of two adjacent second iron core blocks are connected to form a ring structure. In this way, in the process of manufacturing the second rotor core, a plurality of second core blocks can be connected end to end to manufacture the rotor core.
  • the second rotor core includes a plurality of second core segments.
  • the second rotor iron core can be unfolded first, and can be unfolded into one piece, or can be unfolded into a single second iron core block. Then, a second magnetic piece is assembled at a corresponding position on each second iron core block. In this way, the installation difficulty of the second magnetic part and the second rotor core can be reduced, and the production efficiency can be improved.
  • materials can be saved and costs can be reduced.
  • the present application provides a motor, including: a stator assembly; and a rotor assembly according to any one of the above technical solutions.
  • the motor proposed by this application includes a stator assembly and a rotor assembly as proposed by any one of the above technical solutions.
  • the stator assembly and the rotor assembly enable the rotor assembly to rotate through electromagnetic effects, and because the motor proposed by this application includes the above technical solutions.
  • the rotor assembly proposed by any one therefore, has all the effects of the rotor assembly proposed by any one of the above technical solutions, which will not be stated one by one here.
  • the stator assembly includes: a plurality of stator main teeth, the side of the stator main teeth facing the rotor is provided with grooves, and the grooves divide the stator main teeth into a plurality of stator auxiliary teeth.
  • the stator assembly is provided with multiple stator main teeth facing the rotor assembly, and the side of the stator main teeth facing the rotor is provided with grooves, which divide the stator main teeth into multiple stator auxiliary teeth, and then use the grooves and the stator
  • the form of auxiliary teeth can adjust the air gap, modulate the magnetic field, and improve the efficiency of the motor.
  • the number of pole pairs of the stator assembly is Pa
  • the number of stator main teeth is x
  • x represents the number of stator main teeth
  • a represents the number of stator auxiliary teeth on each stator main tooth
  • Pr represents the number of pole pairs of the second rotor.
  • the new harmonic components appearing in the air-gap magnetic density can be used as the working harmonics of the motor to provide output torque for the motor, thereby effectively improving the torque density of the motor.
  • the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.
  • the distances from the bisector of the main teeth of the stator to the two side walls of the groove are equal or different.
  • the distances from the bisector of the main teeth of the stator to the two side walls of the groove are not equal.
  • the grooves are offset towards one end of the main teeth of the stator.
  • Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor.
  • the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density.
  • at least two stator auxiliary teeth lead to the introduction of more harmonic components into the air gap permeance, so that the performance of the motor is significantly improved.
  • stator auxiliary teeth of one stator main tooth there is a notch between the stator auxiliary teeth of one stator main tooth and the stator auxiliary tooth of the other stator main tooth; The distances from the angle bisectors of two adjacent stator main teeth to two adjacent stator auxiliary teeth are equal or unequal.
  • the angle bisector of the main teeth of the stator is equidistant from both side walls of the groove. In this way, in the circumferential direction of the stator assembly, the groove is located in the middle of the main teeth of the stator.
  • Such a design can simplify the overall structure of the stator main teeth and facilitate the processing and manufacturing of the stator main teeth, thereby improving the processing efficiency of the stator assembly and the entire motor.
  • the distances from the angle bisector of the main teeth of the stator to the two side walls of the groove are not equal. In this way, in the circumferential direction of the stator assembly, the grooves are offset towards one end of the main teeth of the stator.
  • Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor.
  • the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density.
  • at least two stator auxiliary teeth lead to the introduction of more harmonic components into the air gap permeance, so that the performance of the motor is significantly improved.
  • the angle ⁇ formed between the bisector of one stator auxiliary tooth and the other stator auxiliary tooth is Satisfy 1 ⁇ (2 ⁇ ax) ⁇ 1.4, where x represents the number of stator main teeth, and a represents the number of stator auxiliary teeth on each stator main tooth.
  • the angle ⁇ formed between the bisector of one stator tooth and the other stator tooth satisfies 1 ⁇ ⁇ [2 ⁇ (a ⁇ x)] ⁇ 1.4; wherein, x represents the number of stator main teeth, and a represents the number of stator auxiliary teeth on each stator main tooth.
  • x represents the number of stator main teeth
  • a represents the number of stator auxiliary teeth on each stator main tooth.
  • the stator assembly includes: a plurality of stator segments, the stators respectively include yoke segments and stator main teeth, and adjacent stator segments are connected through the yoke segments.
  • the stator assembly includes a plurality of stator segments, and the stator assembly is formed by splicing the plurality of stator segments.
  • the staff can first perform operations such as winding on a single stator block, which is conducive to reducing the difficulty of winding, thereby improving the working efficiency of winding and reducing material costs.
  • the present application can first perform operations such as winding on a single stator block, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the applied motor. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate in the winding process, thereby reducing scrap and improving the cost rate of the stator assembly. In addition, individual stator blocks have lower requirements on materials, which can improve the utilization rate of materials, thereby reducing the material cost of the stator assembly.
  • the yoke sections of two adjacent stator segments are detachably connected or fixedly connected.
  • the yoke sections of two adjacent stator blocks are detachably connected, thereby ensuring the disassembly and assembly of two adjacent stator blocks.
  • the stator block further includes a first connecting portion and a second connecting portion.
  • the first connection part is arranged at the first end of the yoke section
  • the second connection part is arranged at the second end of the yoke section
  • the first connection part and the second connection part are opposite to each other on the yoke section.
  • the structures of the first connecting portion and the second connecting portion match, and furthermore, the first connecting portion of one stator block cooperates with the second connecting portion of the other stator block to realize self-locking. Therefore, in the process of splicing stator blocks, the present application can connect two adjacent stator blocks through the first connection part and the second connection part, including the detachable connection of two adjacent stator blocks.
  • one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion.
  • the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function.
  • the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the convex portion matches the shape of the concave portion.
  • the stator assembly further includes: a stator yoke, and the main teeth of the stator are detachably arranged on the stator yoke.
  • the stator assembly includes a stator yoke and stator main teeth arranged on the stator yoke, wherein the stator main teeth and the stator yoke are detachably connected.
  • the wire can be wound on the main teeth of the stator first, and then installed on the yoke.
  • it facilitates winding and improves the fullness of the motor slot;
  • the width of the notch can avoid the influence of the too large notch on the performance of the motor.
  • the main teeth of the stator include: a tooth body, one end of which is connected to the stator yoke; and a tooth shoe, detachably provided at the end of the tooth body away from the stator yoke.
  • the tooth shoe is detachably connected to the tooth body.
  • the wire can be wound on the tooth body first, and then the tooth shoe can be installed.
  • the width of the slot is small, so as to avoid the influence of the excessive slot on the performance of the motor.
  • the present application provides an electrical device, including: the motor provided by any one of the above technical solutions.
  • the electrical equipment proposed by this application includes the motor proposed by this application including the motor proposed by any one of the above technical solutions, therefore, it has all the effects of the motor proposed by any one of the above technical solutions, and will not be stated here. .
  • FIG. 1 shows a schematic structural view of a magnetically permeable hub frame in a rotor assembly according to an embodiment of the present application
  • Fig. 2 shows a schematic structural diagram of a rotor assembly according to an embodiment of the present application
  • Fig. 3 shows a schematic structural diagram of a motor according to an embodiment of the present application
  • Fig. 4 shows a schematic structural diagram of a first rotor core and a first magnetic member in a rotor assembly provided by an embodiment of the present application
  • Fig. 5 shows a schematic structural diagram of a first rotor core in a rotor assembly provided by an embodiment of the present application
  • Fig. 6 shows a schematic structural diagram of a first rotor core and a first magnetic member in a rotor assembly provided by an embodiment of the present application
  • Fig. 7 shows a schematic structural diagram of a first rotor core in a rotor assembly provided by an embodiment of the present application
  • Fig. 8 shows a schematic structural diagram of a first rotor core and a first magnetic member in a rotor assembly provided by an embodiment of the present application
  • Fig. 9 shows a schematic structural diagram of a second rotor core and a second magnetic member in a rotor assembly provided by an embodiment of the present application
  • Fig. 10 shows a schematic structural diagram of a second rotor core in a rotor assembly provided by an embodiment of the present application
  • Fig. 11 shows a schematic structural diagram of a second rotor core and a second magnetic member in a rotor assembly provided by an embodiment of the present application
  • Fig. 12 shows a schematic structural view of the second rotor core in the rotor assembly provided by an embodiment of the present application
  • Fig. 13 shows a schematic structural diagram of a second rotor core and a second magnetic member in a rotor assembly provided by an embodiment of the present application
  • Fig. 14 shows a schematic structural diagram of a motor provided by an embodiment of the present application.
  • Fig. 15 shows a schematic structural diagram of a stator assembly of a motor provided by an embodiment of the present application
  • Fig. 16 shows a schematic structural diagram of a stator assembly of a motor provided by an embodiment of the present application
  • Fig. 17 shows a schematic structural diagram of a stator assembly of a motor provided by an embodiment of the present application
  • Fig. 18 shows a schematic structural diagram of a stator assembly of a motor provided by an embodiment of the present application.
  • stator assembly 100 rotor assembly, 102 magnetically conductive hub frame, 104 end cover, 106 annular yoke, 108 housing, 110 permanent magnet, 112 protruding part, 114 air gap, 116 motor, 118 yoke, 120 stator main teeth, 122 Tooth shoe, 124 stator slot, 126 notch, 128 stator auxiliary tooth, 130 groove, 132 spline surface, 134 first rotor core, 136 first iron core segment, 138 first yoke, 140 first convex pole, 142 the first installation slot, 144 the first magnetic part, 146 the second rotor core, 148 the second iron core segment, 150 the second yoke, 152 the second salient pole, 154 the second installation slot, 156 the second Magnetic part, 158 first gap, 160 second gap, 162 stator assembly, 164 tooth body, 166 tooth shoe, 168 stator yoke, 170 stator slot, 172 stator segment, 174 yoke section, 176 first
  • a rotor assembly 100 , a motor 116 and electrical equipment provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 18 .
  • the dotted line in FIG. 3 represents the tooth body bisector of the auxiliary stator tooth 128 .
  • the present application proposes a rotor assembly 100 in a first aspect. It includes: a magnetically permeable hub frame 102, the magnetically permeable hub frame 102 includes an end cover portion 104 and an annular yoke portion 106, the end cover portion 104 is connected to one axial end of the annular yoke portion 106, and the inner peripheral wall of the annular yoke portion 106 is provided with a plurality of The accommodating portion 108 , a plurality of accommodating portions 108 are distributed along the circumferential direction of the annular yoke portion 106 ; a plurality of permanent magnets 110 are respectively arranged in the a plurality of accommodating portions 108 , and the polarities of the plurality of permanent magnets 110 are the same.
  • the rotor assembly 100 provided in the present application includes a magnetically permeable hub frame 102 and a plurality of permanent magnets 110 .
  • the magnetically permeable hub frame 102 includes a connected end cover portion 104 and an annular yoke portion 106; the end cover portion 104 is connected to one axial end of the annular yoke portion 106, and the inner peripheral wall of the annular yoke portion 106 is provided with a plurality of accommodating portions 108 , a plurality of accommodating portions 108 are distributed along the circumferential direction of the annular yoke portion 106; a plurality of permanent magnets 110 are disposed in the plurality of accommodating portions 108 respectively.
  • the polarities of the plurality of permanent magnets 110 in the rotor assembly 100 proposed by the present application are the same.
  • the magnetically permeable hub frame 102 is made of magnetically permeable materials.
  • the dimensions of the plurality of accommodating portions 108 are equal, so that they are all applicable to the permanent magnet 110 of the same specification.
  • the permanent magnet 110 may be a bar-shaped permanent magnet, a sector-shaped permanent magnet, a horseshoe-shaped permanent magnet or a circular permanent magnet.
  • the magnetically permeable hub frame 102 in the rotor assembly 100 proposed in this application includes a connected end cover portion 104 and an annular yoke portion 106 , and the overall structure of the magnetically permeable hub frame 102 is simple.
  • a plurality of accommodating portions 108 are provided directly on the inner peripheral wall of the annular yoke portion 106 , and the plurality of accommodating portions 108 are ensured to be distributed along the circumferential direction of the annular yoke portion 106 .
  • the effective installation and positioning of the plurality of permanent magnets 110 can be ensured at first, and secondly, the permanent magnets 110 with the same polarity can be ensured to be positioned in the ring.
  • the circumferential direction of the yoke 106 is distributed at intervals.
  • the permanent magnet 110 includes a bar-shaped permanent magnet, a polygonal permanent magnet, etc., because in this embodiment, the permanent magnet 110 is placed in the setting of the accommodating portion 108, so that the permanent magnet 110 of various shapes, as long as its size is located in the accommodating portion 108 can be used within the limited size range, which makes the processing and manufacturing of the permanent magnet 110 more convenient and quicker, and the versatility of various permanent magnets 110 is stronger.
  • the magnetically permeable hub frame 102 in the rotor assembly 100 proposed by the present application includes an annular yoke portion 106 and an end cover portion 104 connected to one axial end of the annular yoke portion 106, which improves the overall structural strength of the magnetically permeable hub frame 102; the annular yoke
  • the inner peripheral wall of the portion 106 is provided with a plurality of accommodation portions 108, and the plurality of accommodation portions 108 are distributed along the circumferential direction of the annular yoke portion 106, and a plurality of permanent magnets 110 with the same polarity are arranged in the plurality of accommodation portions 108, and in the annular yoke portion
  • a magnetic structure with alternating poles is produced on 106, which not only reduces the number of permanent magnets 110 used, but also enhances the magnetic field modulation effect, increases the amplitude of the working magnetic density harmonic, and produces better output performance.
  • the magnetically permeable hub frame 102 further includes: a protrusion 112 disposed on the inner peripheral wall of the annular yoke 106 and facing the annular yoke 106 The middle part of each protrudes, and the accommodating part 108 is located between two adjacent protruding parts 112 .
  • the magnetically permeable hub frame 102 further includes a protrusion 112 .
  • the protruding part 112 is arranged on the inner peripheral wall of the annular yoke part 106, and protrudes toward the middle part of the annular yoke part 106; a receiving part 108 is formed between two adjacent protruding parts 112, and the present application is based on this , disposing a plurality of permanent magnets 110 with the same polarity in the plurality of accommodating portions 108 .
  • the protruding portions 112 and the permanent magnets 110 are alternately distributed in the circumferential direction of the annular yoke portion 106 , thereby forming an alternating pole structure.
  • the protruding portion 112 made of magnetically permeable material will be magnetized by the adjacent permanent magnet 110 into a magnet with opposite magnetic poles, and then the permanent magnets 110 have the same polarity, while the adjacent permanent magnets 110 have the same polarity.
  • the protrusions 112 are all of opposite polarity, forming an alternating pole structure.
  • the protruding portion 112 includes a square protruding portion or a polygonal protruding portion, and any shape of the protruding portion 112 that can realize the partition function and facilitate processing is within the protection scope of the present application.
  • the rotor assembly 100 cooperates with the pole logarithm design of the stator and rotor magnetic fields, and works by using the flux density harmonics, avoiding the problem of output performance degradation caused by the decrease in the amplitude of the flux density fundamental wave after using alternating poles.
  • the number of magnetic poles decreases, the amplitude of the fundamental wave of the air-gap magnetic field decreases, and the output performance of the motor decreases.
  • This application adopts the magnetic field modulation motor structure, that is, the rotor assembly 100 proposed in this application is applied to the magnetic field modulation motor, and the harmonics are used to work, and the modulation effect is enhanced through the salient pole rotor, and the working harmonic content is increased, thereby improving the output of the motor 116 performance. This avoids the problem of performance degradation of the motor 116 caused by the decrease in the amplitude of the fundamental wave of the alternating pole structure.
  • the number of permanent magnets 110 is equal to the number of protrusions 112
  • the thickness of the protrusion 112 is equal to the thickness of the annular yoke 106 .
  • the thickness of the protruding portion 112 is equal to that of the annular yoke portion 106 , so that the protruding portion 112 and the annular yoke portion 106 can be stretched and formed from the same plate, which has a simple structure and reduces manufacturing difficulty. Moreover, this setting makes the overall structural strength of the magnetically permeable hub frame 102 high and has a longer service life.
  • an air gap 114 between the permanent magnet 110 and the inner wall of the housing 108 in the circumferential direction of the annular yoke 106 .
  • the existence of the air gap 114 can effectively reduce the flux leakage between the permanent magnet 110 and the inner wall of the containing chamber, and the magnetization effect of the permanent magnet 110 on the protrusion 112 is the best. Further, the existence of the air gap 114 can reduce assembly difficulty, thereby improving the reliability of the rotor assembly 100 in operation.
  • the size of the air gap 114 is larger than 0 mm and smaller than 3 mm.
  • the size of the air gap 114 affects the operational reliability of the entire rotor assembly 100.
  • the air gap 114 is too large, the reluctance will increase, thereby increasing the excitation loss, so that the permanent magnets 110 protrude The magnetization effect of the portion 112 is reduced, so that an alternating pole structure cannot be produced.
  • the harmonic magnetic field of the air gap 114 will increase, and the permanent magnet 110 will easily collide with the inner wall of the containing cavity during operation, thereby reducing the operating reliability and bringing difficulties to assembly.
  • the dimension d of the air gap 114 is set to be larger than 0 mm and smaller than 3 mm. In this way, the reluctance can be kept within an appropriate range, the permanent magnet 110 has the best magnetization effect on the protruding portion 112 , and the assembly difficulty can be reduced, thereby improving the operation reliability.
  • the application further optimizes the size d of the air gap 114, which further enhances the magnetic field modulation effect, increases the amplitude of the working sub-harmonic, and produces Better output performance.
  • the size of the air gap 114 can be set to 1mm, 1.5mm, 2mm, 2.5mm and so on.
  • an included angle ⁇ is formed between the center of the annular yoke 106 and the line connecting the two ends of the permanent magnet 110, and satisfies 0.9 ⁇ /( ⁇ /(Pr)) ⁇ 1.7, where Pr is the number of permanent magnets 110 .
  • an included angle ⁇ is formed between the center of the annular yoke 106 and the two ends of the permanent magnet 110.
  • the existence of the included angle ⁇ can further change the air gap permeance process, enhance the magnetic field modulation effect, and work
  • the amplitude of the sub-flux density harmonic increases, which further improves the torque of the motor 116 using the rotor assembly 100, thereby avoiding the reduction in the number of magnetic poles after the use of alternating poles in traditional permanent magnet motors, and the fundamental amplitude of the magnetic field The value drops, causing the problem of torque drop.
  • the included angle ⁇ satisfies: 0.9 ⁇ /( ⁇ /(Pr)) ⁇ 1.7, where Pr is the number of permanent magnets 110, when the included angle ⁇ satisfies the above conditions, the magnetic field modulation effect is further enhanced, and the rotor assembly 100 works well.
  • the present application further optimizes the included angle ⁇ formed between the center of the annular yoke 106 and the two ends of the permanent magnet 110 to further make the magnetic field modulation
  • the effect is enhanced, and the amplitude of the working magnetic subharmonic is increased, resulting in better output performance.
  • the permanent magnet 110 includes one of the following: ferrite or rare earth permanent magnet.
  • the permanent magnet 110 can be made of ferrite, which has better magnetic permeability.
  • the permanent magnet 110 is an object that generates a magnetic field.
  • Ferrite is made of various mixed materials, which can generate a stronger magnetic field than natural magnets in nature. It is cheap in price, high in corrosion resistance, and does not require additional
  • the coating is used for protection and can resist the degaussing of the external magnetic field, thereby not only ensuring the use performance, but also reducing the manufacturing cost.
  • the permanent magnet 110 may also be a rare-earth permanent magnet, and the magnetic energy of the rare-earth permanent magnet is positively high.
  • Rare earth permanent magnets can resist demagnetization by external magnetic fields.
  • the protrusion 112 includes a spline surface 132 disposed toward the middle of the annular yoke 106 .
  • the protruding portion 112 includes a spline surface 132 , and the spline surface 132 is disposed toward the middle of the annular yoke 106 .
  • the spline surface 132 is integrally formed, thereby reducing the difficulty of processing.
  • the spline surface 132 in the circumferential direction of the annular yoke 106, includes a plurality of connected sub-spline surfaces, and the sub-spline surfaces include Flat and/or curved.
  • the spline surface 132 in the circumferential direction of the annular yoke 106, includes a plurality of connected sub-spline surfaces, and each section is smoothly connected, so that the curvature of the overall spline surface 132 formed by them changes uniformly. In turn, the energy loss of the rotor assembly 100 during operation is lower.
  • Sub-spline faces include planar and/or arcuate surfaces, resulting in a closer approximation of surface curvature between segments.
  • a motor 116 including: a rotor assembly 100 in any possible design above, a stator assembly, at least a part of the stator assembly is located in the rotor assembly 100 .
  • a motor 116 is proposed, including the rotor assembly 100 in any of the above embodiments, so it has all the beneficial effects of the rotor assembly 100 in any of the above embodiments, and will not be repeated here. .
  • the motor 116 realizes the conversion or transmission of electric energy according to the law of electromagnetic induction, and it can generate driving torque as a power source for equipment or various machines.
  • the electric machine of the present application may be an inner rotor or an outer rotor assembly.
  • the motor 116 further includes a stator assembly, and at least a part of the stator assembly is located in the rotor assembly 100 .
  • the motor 116 When the motor 116 is working, the motor 116 is energized, the stator assembly generates a rotating magnetic field, the rotor assembly 100 is cut by the magnetic force lines in the rotating magnetic field to generate current, and the current is transmitted to the output terminal in the motor 116, so that the motor 116 can output current.
  • the protruding structure of the protruding part 112 on the rotor enhances the air gap permeance effect, enhances the modulation effect, increases the amplitude of the working sub-magnetic density harmonic, and further increases the torque of the motor 116. It has been improved, which in turn produces a greater driving torque and can produce a stronger driving effect.
  • the stator assembly includes: a stator core, and the stator core includes: a yoke 118; a stator main tooth 120, disposed on the yoke 118, and the stator main tooth 120 includes a tooth
  • the shoe 122 has a stator slot 124 between two adjacent stator main teeth 120, and a notch 126 between two adjacent tooth shoes 122, and the notch 126 communicates with the stator slot 124; the stator winding is arranged on the stator main tooth 120, located in the stator slot 124.
  • the stator assembly includes: a stator core, stator main teeth 120 and stator windings, and the stator core includes a yoke 118, which serves both as the main magnetic circuit of the stator and as a mounting for the stator main teeth 120 and the stator windings. and fixed parts.
  • stator main teeth 120 are arranged on the yoke 118 and are further fixed by the yoke 118.
  • the stator main teeth 120 include tooth shoes 122, and there are stator slots 124 between two adjacent stator main teeth 120, so that two adjacent stator teeth 120 There are intervals between the two stator main teeth 120, and the stator slots 124 can play a role of accommodation.
  • stator windings in the stator assembly are arranged on the stator main teeth 120 and located in the stator slots 124 , the stator windings are part of the input circuit of the motor 116 , and the alternating current is passed through to generate an alternating magnetic field.
  • the tooth roots of the stator main teeth 120 are connected to the yoke 118 to achieve a stable connection between the stator main teeth 120 and the yoke 118 .
  • the tooth shoe 122 is arranged on the top of the main tooth 120 of the stator.
  • the setting of the tooth shoe 122 can play a good role in limiting the stator winding in the stator slot 124, thereby ensuring that this part of the stator winding is stably located in the stator slot 124. This prevents the part of the winding assembly from falling out of the stator slot 124, thereby improving the reliability of the stator assembly.
  • the tooth shoe 122 is detachably connected to the main stator tooth 120 . That is, the tooth shoe 122 and the stator main tooth 120 are arranged in a separable sheathing assembly structure, so that the coil can be wound on the stator main tooth 120 first, and then assembled with the tooth shoe 122 after the winding is completed. In this way, the winding process is simplified and the difficulty of winding is reduced.
  • the stator core also includes at least two stator auxiliary teeth 128, which are arranged on the tooth shoe 122.
  • the stator auxiliary teeth 128 are used as magnetic conductive parts for magnetic conduction.
  • the stator auxiliary teeth 128 can also be As a modulation component, it realizes the function of magnetic field modulation.
  • a represents the number of stator main teeth 120
  • x represents the number of stator auxiliary teeth 128 on each stator main tooth 120
  • Pr represents the number The number of permanent magnets 110.
  • the present application further optimizes the number of pole pairs Ps of the stator winding, which further enhances the magnetic field modulation effect, increases the amplitude of the working magnetic density harmonic, and generates better output performance.
  • FIG. 3 there is a groove 130 between two adjacent stator auxiliary teeth 128; in the circumferential direction of the stator assembly, the size of the groove 130 is not the same as the size of the notch 126 wait.
  • the size of the groove 130 is not equal to the size of the notch 126, that is, the width of the groove 130 between two adjacent stator auxiliary teeth 128 is different from that of the adjacent two
  • the slots 126 of the stator slots 124 between the tooth shoes 122 are not equal in width.
  • the uniformity of the distribution of multiple stator auxiliary teeth 128 in the circumferential direction of the stator assembly will be changed, thereby reducing the number of cycles of the air gap permeance, and when the number of cycles of the air gap permeance is reduced, the magnetic flux density generated by The harmonic components will increase, that is, more working harmonics will be generated, and the output torque of the motor 116 will be further increased. In turn, the running performance of the motor 116 is better.
  • the present application further optimizes the size of the groove 130 and the size of the notch 126 to further enhance the magnetic field modulation effect, and the amplitude of the working sub-harmonic Increasing the value yields better output performance.
  • stator auxiliary teeth 128 among two adjacent stator auxiliary teeth 128 , between the tooth body bisector of one stator auxiliary tooth 128 and the tooth body bisector of the other stator auxiliary tooth 128
  • the included angle ⁇ is formed and satisfies 1 ⁇ /(2 ⁇ /(ax)) ⁇ 1.4, where a represents the number of stator main teeth 120 and x represents the number of stator auxiliary teeth 128 on each stator main tooth 120 .
  • an included angle ⁇ is formed between the tooth body bisector of one stator auxiliary tooth 128 and the tooth body bisector of the other stator auxiliary tooth 128, and the included angle ⁇
  • the presence of makes the motor 116 modulated to generate harmonic amplitudes with a certain torque.
  • the included angle ⁇ satisfies the formula 1 ⁇ /(2 ⁇ /(ax)) ⁇ 1.4, where a represents the number of stator main teeth 120 , and x represents the number of stator auxiliary teeth 128 on each stator main tooth 120 .
  • a represents the number of stator main teeth 120
  • x represents the number of stator auxiliary teeth 128 on each stator main tooth 120 .
  • the included angle ⁇ between the tooth body bisector of one stator auxiliary tooth 128 and the tooth body bisector of the other stator auxiliary tooth 128 is further carried out.
  • the optimization further enhances the magnetic field modulation effect, increases the amplitude of the working magnetic subharmonic, and produces better output performance.
  • ⁇ /(2 ⁇ /(ax)) can be 1, 1.1, 1.2, 1.3, 1.4, etc., and those skilled in the art can design according to the actual product.
  • an electrical device including: the motor 116 in any possible design above.
  • the electrical equipment proposed in this embodiment includes the motor 116 in any of the above-mentioned embodiments, so it has all the beneficial effects of the motor 116 in any of the above-mentioned embodiments, and a plurality of permanent magnets 110 with the same polarity are arranged in a plurality of accommodating parts In 108, a magnetic structure with alternating poles is produced on the annular yoke 106, which not only reduces the number of permanent magnets 110 used, but also enhances the magnetic field modulation effect, increases the amplitude of the working sub-harmonic, and produces better The output performance of , will not be discussed in detail here.
  • the motor 116 includes a rotor assembly 100 and a stator assembly disposed concentrically with the rotor assembly 100 and inside the rotor assembly 100 .
  • the stator assembly includes a stator core and a stator winding wound on the stator core.
  • the stator core includes a yoke 118 and a plurality of stator main teeth 120 formed by extending radially from the yoke 118.
  • the stator main teeth 120 include tooth shoes 122.
  • the stator slot 124 can be used to place a stator winding.
  • the stator winding includes a plurality of coils, and each coil is only wound on one stator main tooth 120 . That is to say, a concentrated winding structure with a single stator main tooth 120 wound is adopted. At this time, the winding end of the motor 116 is smaller, which is beneficial to reduce copper consumption, facilitates modularization, and improves manufacturing efficiency.
  • stator auxiliary teeth 128 are distributed on each tooth shoe 122, and the stator auxiliary teeth 128 can not only be used as magnetic conductive parts, but also can be used as modulation parts to realize the function of magnetic field modulation, and the adjacent stator auxiliary teeth 128 A groove 130 is formed between them, and the width of the groove 130 is relatively large, so that more harmonic components are introduced into the air-gap magnetic conduction.
  • the magnetomotive force of the permanent magnet 110 in the rotor assembly 100 and the air gap containing harmonic When the permeation acts, a new harmonic component will appear in the air hole flux density, thereby increasing the torque density of the motor 116 .
  • the width of the stator slot 124 is not equal to the width of the groove 130 between the adjacent stator auxiliary teeth 128.
  • the uniformity of the distribution of the plurality of stator auxiliary teeth 128 on the circumference is determined Change, the cycle number of the air-gap permeance is reduced, so that the flux density harmonic component generated by the adjustment increases, thereby generating more working harmonics, so that the output torque of the motor 116 will be further improved.
  • an included angle ⁇ is formed between the tooth body bisector of one stator auxiliary tooth 128 and the tooth body bisector of the other stator auxiliary tooth 128, and satisfies 1 ⁇ / (2 ⁇ /(ax)) ⁇ 1.4, in the above relationship, a represents the number of stator main teeth 120 , and x represents the number of stator auxiliary teeth 128 on each stator main tooth 120 .
  • a represents the number of stator main teeth 120
  • x represents the number of stator auxiliary teeth 128 on each stator main tooth 120 .
  • the rotor assembly 100 includes a magnetically permeable hub frame 102, and the magnetically permeable hub frame 102 includes an annular yoke portion 106 extending along the circumferential direction of the end cover portion 104 and a plurality of protruding portions 112 uniformly distributed in the circumferential direction, and the annular yoke portion 106 and protrusion 112 are equal in thickness.
  • the magnetically conductive hub frame can be integrally stretched and formed with magnetically conductive materials, which has a simple structure and is less difficult to manufacture, and the magnetically conductive hub frame is an integrated structure with high strength.
  • An accommodating portion 108 is arranged between two adjacent protruding portions 112, and the permanent magnet 110 is arranged on the inner peripheral surface of the annular yoke portion 106 and placed in the accommodating portion 108, and the number and protrusion of the permanent magnets 110
  • the number of parts 112 is equal, and the polarities of a plurality of permanent magnets 110 are all the same, which can be all S poles or all N poles, so that the magnetization produced by the permanent magnets 110 can magnetize the adjacent protruding parts 112, and the magnetization
  • the rear protrusions 112 are of a different polarity than the permanent magnets 110, thereby creating an alternating pole structure.
  • the motor 116 has better output performance.
  • the protruding part 112 includes a square surface, a polygonal surface or a spline surface 132.
  • the sub-spline surface can be a combination of multiple straight lines or straight lines and arcs, so as to ensure the smoothness of each part of the curved surface. Consistent curvature.
  • the permanent magnet 110 includes a square permanent magnet, a tile-shaped permanent magnet or a bread-shaped permanent magnet.
  • the angle between the two ends of the permanent magnets 110 and the centerline of the rotor is ⁇ , and when 0.9 ⁇ /( ⁇ /(Pr)) ⁇ 1.7, the motor 116 has Better output performance.
  • the permanent magnet 110 includes a ferrite or rare earth permanent magnet.
  • the number of pole pairs of the stator assembly and the rotor assembly 100 satisfies a certain relationship, specifically, the number of stator main teeth 120 is a, and the number of stator auxiliary teeth 128 distributed on the tooth shoe 122 of each stator main tooth 120
  • the number of is x
  • the number of pole pairs of the stator winding is Ps
  • the number of permanent magnets 110 in the rotor assembly 100 is Pr
  • the harmonic components can be used as working harmonics of the motor 116 to provide output torque for the motor 116 , thereby effectively increasing the torque density of the motor 116 .
  • the electronic rotor assembly 100 is provided with a protruding portion 112 , the existence of the protruding structure makes the modulation effect stronger, and the amplitude of the working sub-magnetic density harmonic is higher, which is beneficial to increase the output torque of the motor 116 .
  • the application adopts a magnetic field modulation motor structure, that is, the rotor assembly 100 is applied to a magnetic field modulation motor, and harmonics are used to work, and the modulation effect is enhanced by the protruding structure of the rotor assembly 100 with polarity , increase the working harmonic content, thereby improving the output performance of the motor 116 .
  • the present application provides a rotor assembly 100 , including: a first rotor core 134 , a first magnetic part 144 , a second rotor core 146 and a second magnetic part 156 , the first rotor
  • the core 134 and the second rotor core 146 are axially stacked, that is, the first rotor core 134 is located on one side of the second rotor core 146 .
  • the first rotor core 134 includes a first yoke portion 138 and a plurality of first salient poles 140 , the plurality of first salient poles 140 are arranged on the first yoke portion 138 , and a first salient pole 140 is formed between adjacent first salient poles 140 .
  • An installation slot 142 a plurality of first magnetic pieces 144 are disposed in the first installation slot 142 , specifically, at least one first magnetic piece 144 can be set in each first installation slot 142 .
  • the second rotor core 146 includes a second yoke 150 and a plurality of second salient poles 152 , the plurality of second salient poles 152 are arranged on the second yoke 150 , and a second mounting structure is formed between adjacent second salient poles 152 .
  • a plurality of second magnetic pieces 156 are disposed in the second installation slot 154 , specifically, at least one first magnetic piece 144 can be disposed in each first installation slot 142 .
  • the rotor assembly 100 provided in this application includes a first rotor core 134 and a second rotor core 146, wherein a plurality of first salient poles 140 are arranged on the first yoke portion 138 of the first rotor core 134, adjacent
  • the first installation groove 142 is formed between the first salient poles 140, and the first magnetic parts 144 are arranged in the first installation groove 142, and then the first salient poles 140 and the first magnetic parts 144 are alternately surrounded to form a ring structure,
  • the first salient pole 140 is magnetized by the first magnetic member 144, so that both the first salient pole 140 and the first magnetic member 144 have magnetism.
  • the second yoke portion 150 of the second rotor core 146 is provided with a plurality of Second salient poles 152, second installation grooves 154 are formed between adjacent second salient poles 152, second magnetic members 156 are arranged in the second installation grooves 154, and second salient poles 152 and second magnetic members 156 alternately It is surrounded by a ring structure, and then the second salient pole 152 is magnetized by the second magnetic member 156, so that both the second salient pole 152 and the second magnetic member 156 have magnetic properties, thereby reducing the magnetic force of the first magnetic member 144 and the second magnetic member 156. Part 156 half of the input, thereby reducing production costs.
  • first rotor core 134 and the second rotor core 146 form a deflected structure, that is, the first salient pole 140 of the first rotor core 134 and the second salient pole 152 of the second rotor core 146 are misaligned, so that The first magnetic member 144 disposed on the first rotor core 134 is opposite to the second salient pole 152 of the second core.
  • the first rotor core 134 and the second rotor core 146 are axially stacked, and the first magnetic member 144 is arranged corresponding to the second salient pole 152, so that the first magnetic member 144, the first salient pole 140, and the second salient pole 152 can be adjusted.
  • the magnetic field formed by the two magnetic parts 156 and the second salient pole 152 makes the magnetic field formed by the rotor assembly 100 more uniform, suppresses the influence of even harmonics, and reduces the magnetic field torque and torque fluctuation of the motor.
  • the magnetic field strength of the first salient pole 140 is slightly different from the magnetic field strength of the second magnetic member 156, therefore, it is easy to cause even times of back EMF
  • the increase of harmonics, and the present application arranges the first magnetic member 144 and the second salient pole 152 on an axial straight line, which can improve the structure of the overall magnetic field, break the alternating situation of magnetic field strength, and make the overall magnetic field more uniform , suppress the influence of even harmonics, reduce the motor magnetic field torque and torque ripple.
  • the rotor assembly 100 adopts an alternating pole structure, which can reduce the amount of magnetic parts and reduce the cost of the motor.
  • the first rotor core 134 and the first magnetic part 144 are assembled in the form of patches
  • the second rotor core 146 and the second magnetic part 156 are assembled in the form of patches
  • the first rotor The first salient pole 140 of the iron core 134 and the second salient pole 152 of the second rotor iron core 146 can realize the adjustment of the air gap, the modulation effect is enhanced, the amplitude of the working sub-harmonic is increased, and the motor torque is further improved. promote.
  • the centerline of the first magnetic member 144 along the radial direction of the first rotor core 134 may be coplanar with the centerline of the second salient pole 152 along the radial direction of the second rotor core 146 .
  • the first magnetic member 144 is a first permanent magnet
  • the second magnetic member 156 is a second permanent magnet
  • the first salient pole 140 is a first soft magnetic material
  • the second salient pole 152 is a second soft magnetic material.
  • a plurality of first rotor cores 134 and a plurality of second rotor cores 146 may be stacked alternately.
  • the first rotor core 134 and the second rotor core 146 form a deflected structure, that is, the first protrusion of the first rotor core 134
  • the pole 140 and the second salient pole 152 of the second rotor core 146 are misaligned, so that the second magnetic member 156 disposed on the second rotor core 146 is opposite to the first salient pole 140 of the first iron core.
  • the first rotor core 134 and the second rotor core 146 are axially stacked, and the second magnetic member 156 is arranged corresponding to the first salient pole 140, so that the first magnetic member 144, the first salient pole 140, and the first salient pole 140 can be adjusted.
  • the magnetic field formed by the two magnetic parts 156 and the second salient pole 152 makes the magnetic field formed by the rotor assembly 100 more uniform, suppresses the influence of even harmonics, and reduces the magnetic field torque and torque fluctuation of the motor.
  • the magnetic field strength of the second salient pole 152 is slightly different from the magnetic field strength of the second magnetic member 156, so it is easy to cause even times of back EMF Harmonic increases, and the present application arranges the second magnetic member 156 and the first salient pole 140 on an axial straight line, which in turn can improve the structure of the overall magnetic field, break the alternating situation of magnetic field strength, and make the overall magnetic field more uniform , suppress the influence of even harmonics, reduce the motor magnetic field torque and torque ripple.
  • the centerline of the second magnetic member 156 along the radial direction of the second rotor core 146 may be coplanar with the centerline of the first salient pole 140 along the radial direction of the first rotor core 134 .
  • the suppression of even harmonics can be enhanced.
  • the magnetization polarities of all the first magnetic parts 144 are the same; the magnetization polarities of all the second magnetic parts 156 are the same; The magnetization polarity of the first magnetic part 144 is opposite to that of the second magnetic part 156 .
  • the magnetization polarities of all the first magnetic parts 144 are the same, the magnetization polarities of all the second magnetic parts 156 are the same, and the magnetization polarities of the first magnetic parts 144 and the magnetization polarities of the second magnetic parts 156 opposite, that is, if the first magnetic piece 144 is an S pole, then the second magnetic piece 156 is an N pole, if the first magnetic piece 144 is an N pole, then the second magnetic piece 156 is an S pole, and the first salient pole 140
  • the magnetized polarity is also opposite to that of the first magnetic member 144, and the magnetized polarity of the second salient pole 152 is also opposite to that of the second magnetic member 156, so that in the axial direction of the rotor assembly 100, the same polarity of the first
  • the salient pole 140 and the second magnetic member 156 are collinear, and the second salient pole 152 of the same polarity and the second magnetic member 156 are collinear, so that the overall magnetic field formed by the rot
  • the magnetic field intensity generated after the first salient pole 140 and the second salient pole 152 are magnetized is similar, the magnetic field strength of the first magnetic member 144 and the second magnetic member 156 are similar, and thus the magnetization polarity of the first magnetic member 144 If the polarity of the magnetization of the second magnetic member 156 is opposite, then the polarities of the first salient pole 140 and the second salient pole 152 after being magnetized are also opposite.
  • the first magnetic member 144 is an S pole and the second magnetic member 156 is an N pole for example.
  • the number of S poles and N poles is equal, and then the first magnetic member 144 generates a strong S pole, the second magnetic member 156 generates a strong N pole, the first salient pole 140 generates a weak N pole, and the second magnetic member 156 generates a strong N pole.
  • the salient poles 152 generate weak S poles. In the circumferential direction, in the first rotor core 134, the adjacent magnetic poles are distributed as strong S poles, weak N poles, and strong S poles.
  • the adjacent magnetic poles are Very strong N pole, weak S pole and strong N pole, and in the axial direction, the adjacent polarity distribution is strong S pole, weak S pole, strong S pole, or strong N pole, weak N pole, strong N pole , so that the distribution of the entire magnetic field is more uniform, and the influence of even harmonics is further suppressed.
  • the difference between the first rotor core 134 and the second rotor core 146 is an odd number of pole pitches.
  • the difference between the first rotor core 134 and the second rotor core 146 is an odd number of pole pitches, thereby making the magnetic field generated by the rotor assembly 100 more regular, thereby further suppressing the influence of even harmonics, further Reduce motor field torque and torque ripple.
  • the difference between the first rotor core 134 and the second rotor core 146 is 1 pole pitch, 2 pole pitches or 5 pole pitches, etc.
  • the rotor assembly 100 adopts an axially segmented structure, and is formed by stacking the first rotor core 134 and the second rotor core 146 in the axial direction.
  • the upper and lower rotor cores are staggered by one pole moment, and all the first
  • the magnetization polarities of the magnetic parts 144 are both N poles or S poles
  • the magnetization polarities of the second magnetic parts 156 are both S poles or N poles, so that the induced back EMF phases of the two adjacent rotor assemblies 100 The difference is 180°, thereby suppressing the even harmonics in the synthetic back EMF, reducing the cogging torque and torque ripple of the motor.
  • the axial lengths of the first rotor core 134 and the second rotor core 146 are equal.
  • the length of the first rotor core 134 is equal to the length of the second rotor core 146 , so that the first magnetic member 144 is lifted in the axial direction of the rotor assembly 100
  • the symmetry of the generated magnetic field and the magnetic field generated by the second magnetic member 156 further makes the magnetic field generated by the rotor assembly 100 more uniform, thereby further suppressing the influence of even harmonics and further reducing the magnetic field torque and torque ripple of the motor .
  • the first rotor core 134 may be formed by stacking first punches, or press-molded by a soft magnetic material.
  • the second rotor core 146 can be formed by stacking the second punched sheets, or press-molded by soft magnetic material.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • adjacent first magnetic members 144 and first salient poles 140 are spaced apart to form a first gap 158.
  • first gap 158 Through the first gap 158, the distance between the end of the first salient pole 140 and the adjacent first pole 140 is reduced.
  • the leakage magnetic flux on the magnetic member 144 increases the working magnetic flux formed by the first salient pole 140 in the main magnetic circuit and improves the output performance of the motor.
  • the width d1 of the first gap 158 is less than or equal to 3 mm.
  • the width of the first gap 158 is less than or equal to 3mm, and the distance between the adjacent first magnetic member 144 and the first salient pole 140 is less than or equal to 3mm, thereby ensuring the magnetic field strength and the output performance of the motor.
  • the width of the first gap 158 may take a value of 3mm, 2.8mm, 2.5mm, 2.0mm, 1.5mm or 1mm and so on.
  • Embodiment 7 is a diagrammatic representation of Embodiment 7:
  • adjacent second magnetic members 156 and second salient poles 152 are spaced apart to form a second gap 160, and through the second gap 160, the distance between the end of the second salient pole 152 and the adjacent second pole is reduced.
  • the leakage magnetic flux on the magnetic member 156 increases the working magnetic flux formed by the second salient pole 152 in the main magnetic circuit and improves the output performance of the motor.
  • the width d1 of the second gap 160 is less than or equal to 3 mm.
  • the width of the second gap 160 is less than or equal to 3mm, and the distance between the adjacent second magnetic member 156 and the second salient pole 152 is less than or equal to 3mm, thereby ensuring the magnetic field strength and the output performance of the motor.
  • the width of the second gap 160 may take a value of 3mm, 2.8mm, 2.5mm, 2.0mm, 1.5mm or 1mm.
  • Embodiment 8 is a diagrammatic representation of Embodiment 8
  • the angle of the central angle of the first rotor iron core 134 occupied by the first magnetic member 144 is ⁇
  • the number of pole pairs Pr of the first rotor formed by the core 134 and the first magnetic member 144 is 0.9 ⁇ ( ⁇ Pr) ⁇ 1.7.
  • the angle of the central angle of the first rotor core 134 occupied by the first magnetic member 144 is ⁇ , and the existence of the included angle can increase the magnetomotive force of the motor, improve the modulation effect of the magnetic field, and increase the working sub-magnetic density harmonic.
  • the amplitude of the wave ensures the torque of the motor, which also avoids the problem that the number of magnetic poles decreases after the use of alternating poles in the motor, and the amplitude of the fundamental wave of the magnetic field decreases, resulting in a decrease in torque.
  • the line connecting the two ends of the first magnetic member 144 to the center of the first rotor core 134 forms an included angle ⁇ .
  • the angle ⁇ formed between the two ends of the magnetic part 144 and the center of the first rotor core 134 is optimized, which further enhances the magnetic field modulation effect, increases the amplitude of the working sub-harmonic, and produces more Good output performance.
  • Embodiment 9 is a diagrammatic representation of Embodiment 9:
  • the angle of the central angle of the second rotor iron core 146 occupied by the second magnetic member 156 is ⁇
  • the second rotor iron core 146 The number of pole pairs Pr of the second rotor formed by the core 146 and the second magnetic member 156 is 0.9 ⁇ ( ⁇ Pr) ⁇ 1.7.
  • the angle of the central angle of the second rotor core 146 occupied by the second magnetic member 156 is ⁇ , and the existence of the included angle can increase the magnetomotive force of the motor, enhance the modulation effect of the magnetic field, and increase the working sub-magnetic density harmonic.
  • the amplitude of the wave ensures the torque of the motor, which also avoids the problem that the number of magnetic poles decreases after the use of alternating poles in the motor, and the amplitude of the fundamental wave of the magnetic field decreases, resulting in a decrease in torque.
  • the line connecting the two ends of the second magnetic member 156 to the center of the second rotor core 146 forms an angle ⁇ .
  • the second rotor core 146 produces a magnetic structure with alternating poles
  • the second The angle ⁇ formed between the two ends of the magnetic part 156 and the center of the second rotor core 146 is optimized, which further enhances the magnetic field modulation effect, increases the amplitude of the working sub-harmonic, and produces more Good output performance.
  • the first yoke portion 138 and the first salient pole 140 are of an integrated structure.
  • the first yoke portion 138 and the first salient pole 140 are integrated, and only the first magnetic member 144 is required for installation, thereby reducing installation difficulty and improving production efficiency.
  • first yoke portion 138 and the first salient pole 140 may be stamped and formed at the same time, or soft magnetic materials may be used for simultaneous press forming.
  • the second yoke 150 and the second salient pole 152 are of an integrated structure.
  • the second yoke portion 150 and the second salient pole 152 are of an integral structure, and only the second magnetic member 156 is required for installation, thereby reducing installation difficulty and improving production efficiency.
  • the second yoke portion 150 and the second salient pole 152 can be stamped and formed at the same time, or soft magnetic materials can be used to press and form at the same time.
  • a plurality of first magnetic elements 144 form a Halbach array.
  • the plurality of first magnetic elements 144 form a Halbach array, thereby improving the sinusoidality of the magnetic field generated by the first magnetic elements 144 and improving the efficiency of the motor.
  • the first magnetic member 144 adopts a Halbach structure, and is composed of a combination of small magnetic members whose magnetization directions are greater than or equal to three directions.
  • the magnetic field of the first magnetic member 144 is shown by the arrow in FIG. 8 .
  • a plurality of second magnetic elements 156 form a Halbach array (Halbach).
  • the multiple second magnetic elements 156 form a Halbach array, thereby improving the sinusoidality of the magnetic field generated by the second magnetic elements 156 and improving the efficiency of the motor.
  • the second magnetic member 156 adopts a Halbach structure, and is composed of a combination of small magnetic members whose magnetization directions are greater than or equal to three directions.
  • the flux leakage of the magnetic parts can be reduced, the sine degree of the back electromotive force can be further increased, the output performance of the motor can be improved, and the cogging torque and torque fluctuation of the motor can be further reduced.
  • the magnetic field of the second magnetic member 156 is shown by the arrow in FIG. 13 .
  • the first salient pole 140 is disposed inside the first yoke portion 138
  • the second salient pole 152 is disposed on the inner side of the first yoke portion 138 .
  • the inner side of the second yoke 150 is shown in FIGS. 4 to 13 .
  • the first yoke 138 is an annular structure
  • the first salient pole 140 is arranged on the inner circle of the first yoke 138
  • the second yoke 150 is an annular structure
  • the second salient pole 152 is arranged
  • the first salient pole 140 is disposed outside the first yoke portion 138
  • the second salient pole 152 is disposed outside the second yoke portion 150.
  • the first yoke 138 is an annular structure
  • the first salient pole 140 is arranged on the outer ring of the first yoke 138
  • the second yoke 150 is an annular structure
  • the second salient pole 152 is arranged
  • the first magnetic member 144 and the second magnetic member 156 have the same structure.
  • the structure of the first magnetic part 144 is the same as that of the second magnetic part 156, and the magnetic fields generated by the first magnetic part 144 and the second magnetic part 156 are similar or identical, so that the overall magnetic field of the rotor assembly 100 It is more uniform, so that the magnetic field formed by the rotor assembly 100 is more uniform, the influence of even harmonics is suppressed, and the magnetic field torque and torque fluctuation of the motor are reduced.
  • the structure of the first salient pole 140 and the structure of the second salient pole 152 are the same, and then the magnetic fields generated by the magnetization of the first salient pole 140 and the second salient pole 152 are similar or identical, so that the rotor assembly 100
  • the overall magnetic field is more uniform, so that the magnetic field formed by the rotor assembly 100 is more uniform, the influence of even harmonics is suppressed, and the magnetic field torque and torque fluctuation of the motor are reduced.
  • the first rotor core 134 includes a plurality of first iron core segments 136 , and the plurality of first iron cores are spliced into ring.
  • the first rotor core 134 includes a plurality of first core segments 136 connected end to end along the circumferential direction of the first rotor core 134 .
  • any first iron core segment 136 includes a first yoke 138 and at least one first salient pole 140, and the partial yokes of two adjacent first iron core segments 136 are connected to form a ring structure .
  • a plurality of first core segments 136 can be connected end to end to manufacture the rotor core.
  • the first rotor core 134 includes a plurality of first core segments 136 .
  • the first rotor core 134 can be expanded firstly, and can be expanded into one piece, or can be expanded into a single first iron core block 136 . Then, assemble the first magnetic element 144 at the corresponding position on each first iron core block 136 . In this way, the installation difficulty of the first magnetic member 144 and the first rotor core 134 can be reduced, and the production efficiency can be improved.
  • materials can be saved and costs can be reduced.
  • the second rotor core 146 includes a plurality of second core segments 148, and the plurality of second core segments are spliced into ring.
  • the second rotor core 146 includes a plurality of second core segments 148 connected end to end along the circumferential direction of the second rotor core 146 .
  • any first iron core block 136 includes a second yoke 150 and at least one second salient pole 152, and the partial yokes of two adjacent second iron core blocks 148 are connected to form a ring structure .
  • a plurality of second core segments 148 can be connected end to end to manufacture the rotor core.
  • the second rotor core 146 includes a plurality of second core segments 148 .
  • the second rotor core 146 can be expanded firstly, and can be expanded into one piece, or can be expanded into a single second iron core segment 148 .
  • a second magnetic member 156 is assembled at a corresponding position on each second iron core block 148 .
  • the installation difficulty of the second magnetic member 156 and the second rotor core 146 can be reduced, and the production efficiency can be improved.
  • materials can be saved and costs can be reduced.
  • the present application provides a motor, including: a stator assembly 162 ; and a rotor assembly 100 as provided in any one of the above-mentioned embodiments.
  • the motor provided by this application includes a stator assembly 162 and a rotor assembly 100 as proposed in any one of the above-mentioned technical solutions.
  • the stator assembly 162 and the rotor assembly 100 enable the rotor assembly 100 to rotate through electromagnetic effects, and, because of the motor proposed by this application It includes the rotor assembly 100 proposed by any one of the above technical solutions, therefore, it has all the effects of the rotor assembly 100 proposed by any one of the above technical solutions, and will not be stated here one by one.
  • the stator assembly 162 further includes a stator yoke 168 and a plurality of stator main teeth 120 arranged on the stator yoke 168 . Between adjacent stator main teeth 120 Stator slots 170 are formed between them. Moreover, grooves 130 are provided on the side of the stator main teeth 120 facing the rotor, and the grooves 130 divide the stator main teeth 120 into a plurality of stator auxiliary teeth 128 . Specifically, the width of the groove is d2, and d2 is larger or smaller than d3.
  • the stator assembly 162 is provided with a plurality of stator main teeth 120 facing the rotor assembly 100, and the side of the stator main teeth 120 facing the rotor is provided with a groove 130, which divides the stator main teeth 120 into a plurality of stator auxiliary teeth 128, and then use the form of the groove 130 and the auxiliary stator teeth 128 to adjust the air gap, modulate the magnetic field, and improve the efficiency of the motor.
  • the number of pole pairs of the stator assembly 162 is Pa
  • the number of stator main teeth 120 is x
  • x represents the number of stator main teeth 120
  • a represents the number of stator auxiliary teeth 128 on each stator main tooth 120
  • Pr represents the number of pole pairs of the second rotor.
  • the new harmonic components appearing in the air-gap magnetic density can be used as the working harmonics of the motor to provide output torque for the motor, thereby effectively improving the torque density of the motor.
  • the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.
  • stator auxiliary teeth 128 are arranged on the stator main teeth 120, and then the stator auxiliary teeth 128 are used as modulation components to realize the effect of magnetic field modulation, so that more Harmonic components, so that the performance of the motor has been significantly improved.
  • the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.
  • a groove 130 is disposed on one stator main tooth 120 to form two stator auxiliary teeth 128 .
  • the dotted line L1 in FIG. 18 represents the bisector of the main stator teeth 120 along the radial direction of the stator assembly 162 .
  • the distance from the bisector of the stator main tooth 120 to the two side walls of the groove 130 is equal, that is, the distance between the stator main tooth 120
  • the distances from the bisector to the two sidewalls of the groove 130 are d4 and d5 respectively, and d4 is equal to d5.
  • the distance from the bisector of the main stator teeth 120 to the two side walls of the groove 130 is equal.
  • the groove 130 is located in the middle of the stator main teeth 120 .
  • the dotted line L1 in FIG. 18 represents the bisector of the main stator teeth 120 along the radial direction of the stator assembly 162 .
  • the distance from the bisector of the stator main tooth 120 to the two side walls of the groove 130 is equal, that is, the distance between the stator main tooth 120
  • the distances from the bisector to the two sidewalls of the groove 130 are d4 and d5 respectively, and d4 is not equal to d5.
  • the distances from the bisector of the main stator teeth 120 to the two side walls of the groove 130 are not equal.
  • the groove 130 is offset toward one end of the stator main teeth 120 .
  • Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor.
  • the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density.
  • at least two auxiliary stator teeth 128 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.
  • the dotted line L2 in FIG. 18 represents the angle bisector of two adjacent stator main teeth 120 .
  • Embodiment 21 to Embodiment 24 On the basis of any one of Embodiment 21 to Embodiment 24, further, among two adjacent stator main teeth 120, the stator auxiliary teeth 128 of one stator main tooth 120 and the stator auxiliary teeth 128 of the other stator main tooth 120 There is a notch between the teeth 128. At the notch, the distance from the angle bisector of two adjacent stator main teeth 120 to the two adjacent stator auxiliary teeth 128 is equal. Specifically, as shown in FIG. 18 , in the notch , the distances from the angle bisectors of two adjacent stator main teeth 120 to two adjacent stator auxiliary teeth 128 are d6 and d7, and d5 is equal to d6.
  • the distance from the bisector of the angle of the main stator teeth 120 to the two side walls of the groove 130 is equal.
  • the groove 130 is located in the middle of the stator main teeth 120 .
  • the dotted line L2 in FIG. 18 represents the angle bisector of two adjacent stator main teeth 120 .
  • Embodiment 21 to Embodiment 24 On the basis of any one of Embodiment 21 to Embodiment 24, further, among two adjacent stator main teeth 120, the stator auxiliary teeth 128 of one stator main tooth 120 and the stator auxiliary teeth 128 of the other stator main tooth 120 There is a notch between the teeth 128; at the notch, the distance from the angle bisector of two adjacent stator main teeth 120 to the adjacent two stator auxiliary teeth 128 is not equal, specifically, as shown in Figure 18, in the slot At the mouth, the distances from the angle bisectors of two adjacent stator main teeth 120 to two adjacent stator auxiliary teeth 128 are d6 and d7, and d5 is not equal to d6.
  • the distances from the bisector of the angle of the stator main teeth 120 to the two side walls of the groove 130 are not equal.
  • the groove 130 is offset toward one end of the stator main teeth 120 .
  • Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor.
  • new harmonic components will appear in the air-gap flux density.
  • at least two auxiliary stator teeth 128 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.
  • the dotted line L3 in FIG. 18 represents the tooth body bisector of the auxiliary stator teeth 128 along the radial direction of the stator assembly 162 .
  • Embodiment 21 to Embodiment 26 On the basis of any one of Embodiment 21 to Embodiment 26, further, among the two adjacent stator auxiliary teeth 128, along the radial direction of the stator assembly 162, the bisector of one stator auxiliary tooth 128 and the other stator The angle ⁇ formed between the bisectors of the auxiliary teeth 128 satisfies 1 ⁇ [2 ⁇ (a ⁇ x)] ⁇ 1.4, where x represents the number of stator main teeth 120, and a represents each stator main tooth 120 The number of stator secondary teeth 128 .
  • the angle ⁇ formed between the bisector of one stator auxiliary tooth 128 and the other stator auxiliary tooth 128 is , and satisfy 1 ⁇ [2 ⁇ (a ⁇ x)] ⁇ 1.4; wherein, x represents the number of stator main teeth 120, and a represents the number of stator auxiliary teeth 128 on each stator main tooth 120.
  • x represents the number of stator main teeth 120
  • a represents the number of stator auxiliary teeth 128 on each stator main tooth 120.
  • the stator assembly 162 is composed of a plurality of stator segments 172 assembled, and each stator includes a yoke section 174 and a Stator main teeth 120 , adjacent stator segments 172 are connected by yoke sections 174 .
  • the stator assembly 162 includes a plurality of stator segments 172 , and the stator assembly 162 is formed by splicing the plurality of stator segments 172 .
  • workers can first perform operations such as winding on a single stator block 172, which is beneficial to reduce the difficulty of winding, thereby improving the working efficiency of winding and reducing material costs.
  • operations such as winding can be performed on a single stator block 172 first, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the applied motor.
  • the present application can reduce the scrap rate during the winding process, thereby reducing scrap and improving the cost rate of the stator assembly 162 .
  • the independent stator block 172 has lower requirements on materials, which can improve the utilization rate of materials, thereby reducing the material cost of the stator assembly 162 .
  • the yoke sections 174 of two adjacent stator segments 172 are detachably connected or fixedly connected.
  • the yoke sections 174 of two adjacent stator blocks 172 are detachably connected, thereby ensuring the disassembly and assembly of two adjacent stator blocks 172 .
  • the stator block 172 further includes a first connection portion 176 and a second connection portion 178 .
  • the first connecting portion 176 is arranged at the first end of the yoke section 174
  • the second connecting portion 178 is arranged at the second end of the yoke section 174
  • the first connecting portion 176 and the second connecting portion 178 are arranged on the yoke section. Segment 174 is opposite.
  • the structures of the first connecting portion 176 and the second connecting portion 178 are matched, and the first connecting portion 176 of one stator block 172 cooperates with the second connecting portion 178 of another stator block 172 to realize self-locking. Therefore, in the process of splicing the stator blocks 172, the present application can connect two adjacent stator blocks 172 through the first connection part 176 and the second connection part 178, including the detachable parts of the two adjacent stator blocks 172. connect.
  • one of the first connecting portion 176 and the second connecting portion 178 is a convex portion, and the other is a concave portion.
  • the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function.
  • the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the protrusions matches the shape of the recesses.
  • stator yoke 168 and the stator main teeth 120 are detachably fitted.
  • the stator assembly 162 includes a stator yoke 168 and a stator main tooth 120 disposed on the stator yoke 168 , wherein the stator main tooth 120 and the stator yoke 168 are detachably connected.
  • the wire can be wound on the main teeth of the stator 120 first, and then installed on the yoke.
  • the notch width d3 of the slot 170 can avoid the influence of the too large notch on the performance of the motor.
  • portions of the stator yoke 168 may be embedded in the stator main teeth 120 , or portions of the stator main teeth 120 may be embedded in the stator yoke 168 .
  • the stator main tooth 120 includes: a tooth body 164 and a tooth shoe 166 , and one end of the stator main tooth 120 is in phase with the stator yoke 168 connected, and the other end is detachably connected to the tooth shoe 166.
  • the groove 130 is disposed on the tooth shoe 166
  • the auxiliary stator teeth 128 are disposed on the tooth shoe 166 .
  • the tooth shoe 166 is detachably connected to the tooth body 164 .
  • the wire can be wound on the tooth body 164 first, and then the tooth shoe 166 can be installed.
  • Circumferential width reduce the width d3 of the notch, so as to avoid the influence of the too large notch on the performance of the motor.
  • the motor provided in this application includes a stator assembly 162 and a rotor assembly 100, and the stator assembly 162 includes a stator core and a winding.
  • the stator core includes a stator yoke 168 and stator main teeth 120 extending radially from the stator yoke 168 , and stator slots 170 are formed between adjacent stator main teeth 120 .
  • Each stator main tooth 120 includes a tooth body 164 and a tooth shoe 166 arranged at one end of the tooth body 164, a notch is formed between adjacent tooth shoes 166, and a plurality of stator auxiliary teeth 128 are distributed on each tooth shoe 166, correspondingly Grooves 130 are formed between adjacent stator auxiliary teeth 128 ; the winding is composed of multiple coils, the number of coils is the same as the number of stator main teeth 120 , and each coil is wound on a single stator main tooth 120 .
  • the rotor assembly 100 and the stator assembly 162 are arranged concentrically.
  • the rotor assembly 100 includes a magnetically permeable first rotor core 134, a second rotor core 146, a first magnetic member 144 attached to the first rotor core 134, and a first magnetic member 144 attached to the
  • the second magnetic member 156 of the second rotor core 146, the first rotor core 134 and the second rotor core 146 are stacked in the axial direction, and the difference between the first rotor core 134 and the second rotor core 146 is 1 pole moment,
  • the structure of the first rotor core 134 is the same as that of the second rotor core 146, except that they are assembled after rotating a pole pitch, and the first salient poles 140 are uniformly distributed on the inside or outside of the first rotor core 134, and the second A magnetic piece 144 is arranged between the adjacent first salient poles 140, second salient poles 152 are evenly distributed on the outside
  • the centerline of the first salient pole 140 is aligned with the centerline of the second magnetic member 156
  • the centerline of the second salient pole 152 is aligned with the centerline of the first magnetic member 144
  • the magnetization polarities of the first magnetic part 144 and the second magnetic part 156 are opposite.
  • the auxiliary stator teeth 128 on the tooth shoe 166 are used as modulation components to realize the magnetic field modulation.
  • the slot opening is small, and the air gap permeance is close to a constant.
  • the main stator tooth 120 is split into multiple stator auxiliary teeth 128, and a large groove 130 is formed between adjacent stator auxiliary teeth 128, so that more harmonics are introduced into the air gap permeance portion.
  • new harmonic components will appear in the air-gap flux density.
  • the rotor assembly 100 adopts an alternating pole structure, the first rotor core 134 has the first salient pole 140 and the second rotor core 146 has the second salient pole 152, the air gap permeance is further changed, the modulation effect is enhanced, and the working The amplitude of the sub-flux harmonic increases, the motor torque is further improved, and the alternating pole structure can reduce the amount of permanent magnets and reduce the cost of the motor.
  • the rotor assembly 100 adopts an axially segmented structure, and is formed by stacking the first rotor core 134 and the second rotor core 146 in the axial direction.
  • the upper and lower rotor cores are staggered by one pole moment, and all the first magnetic parts 144
  • the magnetization polarities of the two magnets are both N poles or S poles
  • the magnetization polarities of the second magnetic member 156 are both S poles or N poles, so that the phase difference of the induced back EMFs of the two adjacent rotor assemblies 100 is 180° , thereby suppressing the even harmonics in the synthetic back EMF, reducing the cogging torque and torque ripple of the motor.
  • each coil is only wound on one stator main tooth 120, that is, a single-tooth-wound concentrated winding structure is adopted. At this time, the end of the motor winding is small, which is beneficial to reduce copper loss and facilitates the realization of Modularization improves manufacturing efficiency.
  • first gap 158 between the first magnetic member 144 and the first salient pole 140
  • second gap 160 between the second magnetic member 156 and the second salient pole 152
  • the first gap 158 and the second gap 160 When the width range is 0 to 3mm, the output performance of the motor is better.
  • the first magnetic part 144 and the second magnetic part 156 adopt a Halbach structure, and are composed of a combination of small magnetic parts with magnetization directions greater than or equal to three directions.
  • the motor of the present application may be an inner rotor motor or an outer rotor motor.
  • the present application provides an electrical device, including: the motor provided in any one of the above embodiments.
  • the electrical equipment provided by the present application includes the motor provided by any of the above embodiments, therefore, it has all the effects of the motor provided by any of the above embodiments, and will not be stated here one by one.
  • the electrical equipment provided in this application includes but is not limited to products such as refrigerators, washing machines, and air conditioners.
  • connection means two or more, unless otherwise clearly defined.
  • connection can be fixed connection, detachable connection, or integral connection; “connection” can be directly or indirectly through an intermediary.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente demande concerne un ensemble rotor, un moteur et un équipement électrique. L'ensemble rotor comprend : un cadre de moyeu magnétiquement conducteur, le cadre de moyeu magnétiquement conducteur comprenant une partie de couvercle d'extrémité et une partie de culasse annulaire, la partie de couvercle d'extrémité étant reliée à l'extrémité axiale de la partie de culasse annulaire, et la paroi périphérique interne de la partie de culasse annulaire étant pourvue d'une pluralité de parties de réception, la pluralité de parties de réception étant réparties le long de la direction circonférentielle de la partie de culasse annulaire ; et une pluralité d'aimants permanents respectivement disposés dans la pluralité de parties de réception, les polarités de la pluralité d'aimants permanents étant identiques. Au moyen de l'ensemble rotor de la présente demande, la partie de culasse annulaire et la partie de couvercle d'extrémité reliée à l'extrémité axiale de la partie de culasse annulaire sont fournies, améliorant ainsi la résistance structurelle globale du cadre de moyeu magnétiquement conducteur ; la paroi périphérique interne de la partie de culasse annulaire est pourvue d'une pluralité de parties de réception, et la pluralité d'aimants permanents de même polarité sont disposés dans la pluralité de parties de réception, de manière à créer une structure magnétique à pôles conséquents sur la partie de culasse annulaire, réduisant ainsi le nombre d'aimants permanents utilisés, réduisant la difficulté de fabrication d'un rotor à pôles conséquents, améliorant l'effet de modulation de champ magnétique, et augmentant l'amplitude d'une harmonique de densité de flux de l'ordre magnétique de travail.
PCT/CN2022/078988 2021-12-17 2022-03-03 Ensemble rotor, moteur et équipement électrique WO2023108910A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN202123183375.0 2021-12-17
CN202123185293.XU CN216356170U (zh) 2021-12-17 2021-12-17 转子结构、电机和电器设备
CN202111550871.7 2021-12-17
CN202111550908.6 2021-12-17
CN202111550871.7A CN114172290A (zh) 2021-12-17 2021-12-17 转子组件、电机和电器设备
CN202123183375.0U CN216356169U (zh) 2021-12-17 2021-12-17 转子组件、电机和电器设备
CN202123185293.X 2021-12-17
CN202111550908.6A CN114069924A (zh) 2021-12-17 2021-12-17 转子结构、电机和电器设备

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CN117080039A (zh) * 2023-09-05 2023-11-17 广东省新兴激光等离子体技术研究院 分析磁场装置及离子注入机
CN117080039B (zh) * 2023-09-05 2024-05-31 广东省新兴激光等离子体技术研究院 分析磁场装置及离子注入机

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JP2012023861A (ja) * 2010-07-14 2012-02-02 Mitsubishi Electric Corp 電機子鉄心とモータ
CN202309462U (zh) * 2011-09-30 2012-07-04 佛山市南海区东唐电机厂 直流无刷电机外转子总成装置
CN104969446A (zh) * 2013-02-08 2015-10-07 罗伯特·博世有限公司 用于电机的转子装置
CN107124053A (zh) * 2017-05-27 2017-09-01 南京航空航天大学 一种采用混合永磁体的交替极永磁电机转子
CN113364155A (zh) * 2020-03-05 2021-09-07 广东威灵电机制造有限公司 单相无刷直流电机和电器设备
CN114069924A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 转子结构、电机和电器设备

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JP2012023861A (ja) * 2010-07-14 2012-02-02 Mitsubishi Electric Corp 電機子鉄心とモータ
CN202309462U (zh) * 2011-09-30 2012-07-04 佛山市南海区东唐电机厂 直流无刷电机外转子总成装置
CN104969446A (zh) * 2013-02-08 2015-10-07 罗伯特·博世有限公司 用于电机的转子装置
CN107124053A (zh) * 2017-05-27 2017-09-01 南京航空航天大学 一种采用混合永磁体的交替极永磁电机转子
CN113364155A (zh) * 2020-03-05 2021-09-07 广东威灵电机制造有限公司 单相无刷直流电机和电器设备
CN114069924A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 转子结构、电机和电器设备

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117080039A (zh) * 2023-09-05 2023-11-17 广东省新兴激光等离子体技术研究院 分析磁场装置及离子注入机
CN117080039B (zh) * 2023-09-05 2024-05-31 广东省新兴激光等离子体技术研究院 分析磁场装置及离子注入机

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