CN104716754A - Method for improving motor torque density and radial and axial magnetic flux parallel-connected permanent magnet motor - Google Patents

Method for improving motor torque density and radial and axial magnetic flux parallel-connected permanent magnet motor Download PDF

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Publication number
CN104716754A
CN104716754A CN201510086075.0A CN201510086075A CN104716754A CN 104716754 A CN104716754 A CN 104716754A CN 201510086075 A CN201510086075 A CN 201510086075A CN 104716754 A CN104716754 A CN 104716754A
Authority
CN
China
Prior art keywords
rotor
magnetic flux
axial magnetic
radial
permanent magnet
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201510086075.0A
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Chinese (zh)
Inventor
杨国威
欧景
杜成飞
宋宝
曲荣海
毕海生
郭文文
王坤
汤欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN HUADA NEW TYPE MOTOR CO Ltd
Original Assignee
WUHAN HUADA NEW TYPE MOTOR CO Ltd
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
Application filed by WUHAN HUADA NEW TYPE MOTOR CO Ltd filed Critical WUHAN HUADA NEW TYPE MOTOR CO Ltd
Priority to CN201510086075.0A priority Critical patent/CN104716754A/en
Publication of CN104716754A publication Critical patent/CN104716754A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278Surface mounted magnets; Inset magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03Machines characterised by aspects of the air-gap between rotor and stator

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

Abstract

The invention provides a method for improving motor torque density. According to the method for improving the motor torque density based on a radial and axial magnetic flux parallel-connected permanent magnet motor, radial magnetic flux and axial magnetic flux are combined. In a motor rotor, the radial magnetic flux and the axial magnetic flux are provided with independent magnetic flux paths respectively, the space utilization rate of the rotor and the utilization rate of an iron core are effectively improved, and the limitation of iron core saturation to the motor torque density and the power density is reduced. The axial magnetic flux forms a closed loop through a rotor front portion, a rotor end face permanent magnet set, a rotor end face air gap and a stator. The radial magnetic flux forms a closed loop through a rotor, a rotor circumference face permanent magnet set, a rotor circumference face air gap and the stator. The invention further provides the radial and axial magnetic flux parallel-connected permanent magnet motor.

Description

Lifting motor torque density method and radial direction, axial magnetic flux magneto in parallel
Technical field
The present invention relates to technical field of motors, especially a kind of lifting motor torque density method and radial direction, axial magnetic flux magneto in parallel.
Background technology
Improving torque density and the power density of motor, reduce the volume and weight of motor, is the eternal direction of motor development.For traditional radial motor, when the seat No. of motor is larger, be not fully used in the space of its rotor, and especially at rotor forehead, magnetic is close almost nil, and therefore rotor core utilance is lower easily saturated, is difficult to improve motor torque density.And traditional radial motor solution is in the perforate of rotor forehead, but in order to ensure mechanical strength, perforate size and shape limits all to some extent, is difficult to be effective.
Summary of the invention
In view of this, the present invention is directed to above-mentioned shortcomings and deficiencies, a kind of lifting motor torque density method and radial direction, axial magnetic flux magneto in parallel are provided.
A method for lifting motor torque density, described method comprises carries out parallel connection by the radial flux of motor and axial magnetic flux, and among rotor, radial flux and axial magnetic flux have independently magnetic flux path respectively.
In the method for lifting motor torque density of the present invention, axial magnetic flux forms closed-loop path by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator;
Radial flux forms closed-loop path by rotor, rotor circumference face set of permanent magnets, rotor circumference face air gap, stator.
In the method for lifting motor torque density of the present invention, described axial magnetic flux is formed axial magnetic flux in closed-loop path and, by rotor forehead, is improved rotor forehead magnetic close by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator.
In the method for lifting motor torque density of the present invention, rotor end-face set of permanent magnets and rotor circumference face set of permanent magnets are same group of permanent magnet.
In the method for lifting motor torque density of the present invention, rotor end-face set of permanent magnets and rotor circumference face set of permanent magnets have identical number of poles and phase place.
In the method for lifting motor torque density of the present invention, radial flux and axial magnetic flux acting in conjunction are on a set of winding coil or act on double winding coil.
In the method for lifting motor torque density of the present invention, double winding coil has the identical number of phases, connected mode.
In the method for lifting motor torque density of the present invention, motor is synchronous machine or asynchronous machine; Magneto or induction machine; Direct current machine or alternating current machine; Or be superconducting motor.
The present invention also provides a kind of radial, axial magnetic flux magneto in parallel, and it comprises a motor stator, a rotor, multiple coil windings;
Motor stator comprises one first stator core and one second stator core; First stator core and the second stator core are that L-type is connected; First stator core is offered multiple first teeth groove; Second stator core is offered multiple second teeth groove; The number of the first teeth groove, the second teeth groove is identical; Same section of the first stator core is connected with the second teeth groove with the first teeth groove of the second stator core;
Rotor is annular, and it comprises a first rotor iron core and one second rotor core; At rotor, the first permanent magnet group is set on the end face of motor stator; At the periphery of rotor, the second permanent magnet group is set; The identical placement of polarity of the first permanent magnet group and the second permanent magnet group, or the South Pole of the first permanent magnet group and the second permanent magnet group, the arctic are staggeredly placed;
Coil windings is arranged in two connected the first teeth groove and the second teeth groove connected.
In radial direction of the present invention, axial magnetic flux magneto in parallel, the first rotor iron core is the silicon steel sheet of radial lamination; Second rotor core is the silicon steel sheet of radial lamination.
The present invention is by carrying out parallel connection by radial flux and axial magnetic flux, and in the middle of rotor, radial flux and axial magnetic flux have independently magnetic flux path respectively, improve motor torque density.Effectively improve rotor core utilance, reduce the restriction of core sataration to motor torque density and power density.Axial magnetic flux forms closed-loop path by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator.Radial flux forms closed-loop path by rotor, rotor circumference face set of permanent magnets, rotor circumference face air gap, stator.Radial flux and axial magnetic flux form closed-loop path separately, without cross-couplings.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of motor stator and rotor tangent plane in the method for the lifting motor torque density of the embodiment of the present invention;
Fig. 2 is the radial direction of the embodiment of the present invention, the structural diagrams intention of axial magnetic flux magneto in parallel;
Fig. 3 is the structural diagrams intention of motor stator in Fig. 2;
Fig. 4 is the structural diagrams intention of the first stator core in Fig. 3;
Fig. 5 is the structural diagrams intention of the second stator core in Fig. 3;
Fig. 6 is the structural representation of Fig. 1 coil winding;
Fig. 7 is the structural representation of rotor in Fig. 1;
Fig. 8 is the structural representation of the first rotor iron core in Fig. 7;
Fig. 9 is the structural representation of the second rotor core in Fig. 7.
In accompanying drawing: 01-motor stator, 02-rotor, 03-first stator core, 04-second stator core, 05-the first rotor iron core, 06-second rotor core, 07-coil windings, 08-first permanent magnet group, 09-second permanent magnet group, 31-first teeth groove, 32-second teeth groove, 71-first coil, 72-second coil.
Embodiment
Principle of the present invention is as follows, as shown in Figure 1, in the method for a kind of lifting motor torque density provided in the embodiment of the present invention, can to combine lifting motor torque density based on radial flux and axial magnetic flux.Radial flux and axial magnetic flux are carried out parallel connection, and in the middle of rotor, radial flux and axial magnetic flux have independently magnetic flux path respectively.Effectively improve rotor core utilance, reduce the restriction of core sataration to motor torque density and power density.
Wherein, axial magnetic flux forms closed-loop path by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator.Radial flux forms closed-loop path by rotor, rotor circumference face set of permanent magnets, rotor circumference face air gap, stator.
Alternatively, formed in closed-loop path at described axial magnetic flux by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator, axial magnetic flux, by rotor forehead, improves rotor forehead magnetic close.
Alternatively, rotor end-face set of permanent magnets and rotor circumference face set of permanent magnets, can be same group of permanent magnet, may not be; Can be identical number of poles and phase place, may not be.
Alternatively, radial flux and axial magnetic flux can acting in conjunction on a set of winding coil, also can act on double winding coil.Wherein, the number of phases, connected mode that double winding coil can be identical, also can be different.
Alternatively, in the method for the lifting motor torque density that the embodiment of the present invention provides, motor can be synchronous machine, also can be asynchronous machine.Motor can be magneto, also can be induction machine.Motor can be direct current machine, also can be alternating current machine.Motor can be superconducting motor, may not be.The embodiment of the present invention is not limited only to this.
The principle of the embodiment of the present invention and effect are: the present invention is by carrying out parallel connection by radial flux and axial magnetic flux, and in the middle of rotor, radial flux and axial magnetic flux have independently magnetic flux path respectively, improve motor torque density.Effectively improve rotor core utilance, reduce the restriction of core sataration to motor torque density and power density.Axial magnetic flux forms closed-loop path by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator.Radial flux forms closed-loop path by rotor, rotor circumference face set of permanent magnets, rotor circumference face air gap, stator.Radial flux and axial magnetic flux form closed-loop path separately, without cross-couplings.
As shown in figs. 2-9, the embodiment of the present invention also provides a kind of radial, axial magnetic flux magneto in parallel, and this motor is synchronous machine alternatively, and certain embodiment of the present invention is not limited only to this.
A kind of radial, axial magnetic flux magneto in parallel, it comprises motor stator 01, rotor 02, multiple coil windings 07.
Motor stator 01 comprises one first stator core 03 and one second stator core 04; First stator core 03 with the second stator core 04 for L-type is connected; First stator core 03 is offered multiple first teeth groove 31; Second stator core 04 is offered multiple second teeth groove 41; The number of the first teeth groove 31, second teeth groove 41 is identical; Same section of the first stator core 03 is connected with the second teeth groove 41 with the first teeth groove 31 of the second stator core 04.
Rotor 02 is in annular, and it comprises the first rotor iron core 05 and one second rotor core 06; At rotor 02, the first permanent magnet group 08 is set on the end face of motor stator 01; At the periphery of rotor 02, the second permanent magnet group 09 is set; The identical placement of polarity of the first permanent magnet group 08 and the second permanent magnet group 09, or the South Pole of the first permanent magnet group 08 and the second permanent magnet group 09, the arctic are staggeredly placed.
Alternatively, the first rotor iron core 05 is the silicon steel sheet of radial lamination; Second rotor core 06 is the silicon steel sheet of radial lamination.Other materials can certainly be selected as the first rotor iron core 05 and the second rotor core 06.
Coil windings 07 is arranged in two connected the first teeth groove 31 and the second teeth groove 41 connected.Coil windings 07 comprises the first coil 71 and the second coil 72.First coil 71 is arranged within the one the first teeth groove 31, and the second coil 72 is arranged within the first teeth groove.First coil 71, second coil 72 is U-shaped frame.
The radial direction that the embodiment of the present invention provides, axial magnetic flux magneto in parallel may be used for the method implementing the lifting motor torque density that the embodiment of the present invention provides.Certainly, the method for lifting motor torque density that the embodiment of the present invention provides is not limited to this radial direction, axial magnetic flux magneto in parallel realizes.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, in the above description according to the functional composition and the step that generally describe each example.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not exceed scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in random access memory, internal memory, read-only memory, electrically programmable ROM, electricity can sassafras except any other forms of storage medium known in programming ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Be understandable that, for the person of ordinary skill of the art, other various corresponding change and distortion can be made by technical conceive according to the present invention, and all these change the protection range that all should belong to the claims in the present invention with distortion.

Claims (10)

1. a method for lifting motor torque density, is characterized in that, described method comprises carries out parallel connection by the radial flux of motor and axial magnetic flux, and among rotor, radial flux and axial magnetic flux have independently magnetic flux path respectively.
2. the method for lifting motor torque density as claimed in claim 1, is characterized in that,
Axial magnetic flux forms closed-loop path by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator;
Radial flux forms closed-loop path by rotor, rotor circumference face set of permanent magnets, rotor circumference face air gap, stator.
3. the method for lifting motor torque density as claimed in claim 2, it is characterized in that, described axial magnetic flux is formed axial magnetic flux in closed-loop path and, by rotor forehead, is improved rotor forehead magnetic close by rotor forehead, rotor end-face set of permanent magnets, rotor end-face air gap, stator.
4. the method for lifting motor torque density as claimed in claim 3, it is characterized in that, rotor end-face set of permanent magnets and rotor circumference face set of permanent magnets are same group of permanent magnet.
5. the method for lifting motor torque density as claimed in claim 3, it is characterized in that, rotor end-face set of permanent magnets and rotor circumference face set of permanent magnets have identical number of poles and phase place.
6. the method for lifting motor torque density as claimed in claim 3, it is characterized in that, radial flux and axial magnetic flux acting in conjunction are on a set of winding coil or act on double winding coil.
7. the method for lifting motor torque density as claimed in claim 6, it is characterized in that, double winding coil has the identical number of phases, connected mode.
8. the method for the lifting motor torque density as described in any one of claim 1 to 7, is characterized in that, motor is synchronous machine or asynchronous machine; Magneto or induction machine; Direct current machine or alternating current machine; Or be superconducting motor.
9. radial direction, an axial magnetic flux magneto in parallel, it is characterized in that, it comprises a motor stator, a rotor, multiple coil windings;
Motor stator comprises one first stator core and one second stator core; First stator core and the second stator core are that L-type is connected; First stator core is offered multiple first teeth groove; Second stator core is offered multiple second teeth groove; The number of the first teeth groove, the second teeth groove is identical; Same section of the first stator core is connected with the second teeth groove with the first teeth groove of the second stator core;
Rotor is annular, and it comprises a first rotor iron core and one second rotor core; At rotor, the first permanent magnet group is set on the end face of motor stator; At the periphery of rotor, the second permanent magnet group is set; The identical placement of polarity of the first permanent magnet group and the second permanent magnet group, or the South Pole of the first permanent magnet group and the second permanent magnet group, the arctic are staggeredly placed;
Coil windings is arranged in two connected the first teeth groove and the second teeth groove connected.
10. radial direction according to claim 9, axial magnetic flux magneto in parallel, it is characterized in that, the first rotor iron core is the silicon steel sheet of radial lamination; Second rotor core is the silicon steel sheet of radial lamination.
CN201510086075.0A 2015-02-16 2015-02-16 Method for improving motor torque density and radial and axial magnetic flux parallel-connected permanent magnet motor Pending CN104716754A (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018029424A (en) * 2016-08-16 2018-02-22 マツダ株式会社 Dynamo-electric machine
JP2018029423A (en) * 2016-08-16 2018-02-22 マツダ株式会社 Dynamo-electric machine
US10700562B2 (en) 2016-01-26 2020-06-30 Jiangsu University Motor with separated permanent magnet torque and reluctance torque and its optimal efficiency control
CN112019095A (en) * 2020-07-09 2020-12-01 中国人民解放军海军工程大学 Permanent magnet-electromagnetism hybrid suspension structure based on parallel magnetic circuit
CN112510946A (en) * 2020-11-20 2021-03-16 哈尔滨工业大学 High-power-density axial transverse flux outer rotor permanent magnet motor for aerospace field
US11133763B1 (en) 2020-04-30 2021-09-28 Tula eTechnology, Inc. Magnetically de-coupled, separately controlled, multiple electric machine assembly for driving a common shaft
US11159077B2 (en) 2016-07-03 2021-10-26 Reza Nasirizarandi Hybrid hysteresis motor
US11557996B1 (en) 2021-07-08 2023-01-17 Tula eTechnology, Inc. Methods of reducing vibrations for electric motors
US11623529B2 (en) 2018-03-19 2023-04-11 Tula eTechnology, Inc. Pulse modulated control with field weakening for improved motor efficiency
US11626827B2 (en) 2018-03-19 2023-04-11 Tula eTechnology, Inc. Pulsed electric machine control
US11628730B2 (en) 2021-01-26 2023-04-18 Tula eTechnology, Inc. Pulsed electric machine control
US11637466B1 (en) 2021-10-18 2023-04-25 Tula Etechnology Inc. Mechanical and electromechanical arrangements for field-weakening of an electric machine that utilizes permanent magnets
US11637513B2 (en) 2021-03-15 2023-04-25 Tula eTechnology, Inc. Methods of optimizing waveforms for electric motors
US11673476B2 (en) 2021-08-12 2023-06-13 Tula eTechnology, Inc. Method of optimizing system efficiency for battery powered electric motors
US11695361B2 (en) 2021-06-14 2023-07-04 Tula eTechnology, Inc. Electric machines with efficient torque transitions
US11863096B2 (en) 2018-03-19 2024-01-02 Tula eTechnology, Inc. Boosted converter for pulsed electric machine control
US11888424B1 (en) 2022-07-18 2024-01-30 Tula eTechnology, Inc. Methods for improving rate of rise of torque in electric machines with stator current biasing
US11916498B2 (en) 2021-09-08 2024-02-27 Tule eTechnology Inc. Electric machine torque adjustment based on waveform integer multiples
US11973447B2 (en) 2021-06-28 2024-04-30 Tula eTechnology, Inc. Selective phase control of an electric machine
US12003202B2 (en) 2023-03-08 2024-06-04 Tula eTechnology, Inc. Pulsed electric machine control

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CN1092565A (en) * 1993-02-22 1994-09-21 杨泰和 The motor of axle end cover formed closed circular magnetic circuit
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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10700562B2 (en) 2016-01-26 2020-06-30 Jiangsu University Motor with separated permanent magnet torque and reluctance torque and its optimal efficiency control
US11159077B2 (en) 2016-07-03 2021-10-26 Reza Nasirizarandi Hybrid hysteresis motor
JP2018029423A (en) * 2016-08-16 2018-02-22 マツダ株式会社 Dynamo-electric machine
JP2018029424A (en) * 2016-08-16 2018-02-22 マツダ株式会社 Dynamo-electric machine
US11626827B2 (en) 2018-03-19 2023-04-11 Tula eTechnology, Inc. Pulsed electric machine control
US11623529B2 (en) 2018-03-19 2023-04-11 Tula eTechnology, Inc. Pulse modulated control with field weakening for improved motor efficiency
US11863096B2 (en) 2018-03-19 2024-01-02 Tula eTechnology, Inc. Boosted converter for pulsed electric machine control
US11545918B2 (en) 2020-04-30 2023-01-03 Tula eTechnology, Inc. Magnetically de-coupled, separately controlled, multiple electric machine assembly for driving a common shaft
WO2021221852A1 (en) * 2020-04-30 2021-11-04 Tula Etechnology Inc. Magnetically de-coupled, separately controlled, multiple electric machine assembly for driving a common shaft
US11133763B1 (en) 2020-04-30 2021-09-28 Tula eTechnology, Inc. Magnetically de-coupled, separately controlled, multiple electric machine assembly for driving a common shaft
CN112019095B (en) * 2020-07-09 2021-07-20 中国人民解放军海军工程大学 Permanent magnet-electromagnetism hybrid suspension structure based on parallel magnetic circuit
CN112019095A (en) * 2020-07-09 2020-12-01 中国人民解放军海军工程大学 Permanent magnet-electromagnetism hybrid suspension structure based on parallel magnetic circuit
CN112510946A (en) * 2020-11-20 2021-03-16 哈尔滨工业大学 High-power-density axial transverse flux outer rotor permanent magnet motor for aerospace field
US11628730B2 (en) 2021-01-26 2023-04-18 Tula eTechnology, Inc. Pulsed electric machine control
US11637513B2 (en) 2021-03-15 2023-04-25 Tula eTechnology, Inc. Methods of optimizing waveforms for electric motors
US11695361B2 (en) 2021-06-14 2023-07-04 Tula eTechnology, Inc. Electric machines with efficient torque transitions
US11973447B2 (en) 2021-06-28 2024-04-30 Tula eTechnology, Inc. Selective phase control of an electric machine
US11557996B1 (en) 2021-07-08 2023-01-17 Tula eTechnology, Inc. Methods of reducing vibrations for electric motors
US11673476B2 (en) 2021-08-12 2023-06-13 Tula eTechnology, Inc. Method of optimizing system efficiency for battery powered electric motors
US11916498B2 (en) 2021-09-08 2024-02-27 Tule eTechnology Inc. Electric machine torque adjustment based on waveform integer multiples
US11637466B1 (en) 2021-10-18 2023-04-25 Tula Etechnology Inc. Mechanical and electromechanical arrangements for field-weakening of an electric machine that utilizes permanent magnets
US11888424B1 (en) 2022-07-18 2024-01-30 Tula eTechnology, Inc. Methods for improving rate of rise of torque in electric machines with stator current biasing
US12003202B2 (en) 2023-03-08 2024-06-04 Tula eTechnology, Inc. Pulsed electric machine control

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