CN112104122A - Cycloidal-pin gear star-shaped electric transmission mechanism - Google Patents

Cycloidal-pin gear star-shaped electric transmission mechanism Download PDF

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Publication number
CN112104122A
CN112104122A CN202010816856.1A CN202010816856A CN112104122A CN 112104122 A CN112104122 A CN 112104122A CN 202010816856 A CN202010816856 A CN 202010816856A CN 112104122 A CN112104122 A CN 112104122A
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CN
China
Prior art keywords
stator
rotor
core
rotor core
permanent magnet
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CN202010816856.1A
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Chinese (zh)
Inventor
朱姝姝
毕颖
刘闯
张朝刚
周燕飞
朱方晨
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Priority to CN202010816856.1A priority Critical patent/CN112104122A/en
Publication of CN112104122A publication Critical patent/CN112104122A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention discloses a cycloidal-pin-wheel star-shaped electric transmission mechanism, which comprises a static stator part and a rotary rotor part, wherein the static stator part is connected with the rotary rotor part; the stator part comprises a stator iron core, the stator iron core is used as a pinwheel, stator slots and stator teeth are uniformly arranged on the stator iron core, and armature windings are arranged in the stator slots; the rotor part comprises a rotor core and permanent magnets arranged on the rotor core, the rotor core is used as a cycloid wheel, and the NS poles of the permanent magnets are alternately arranged; when the number of the stator teeth is n, the number of the rotor iron core poles is n-1; the centers of the rotor core and the stator core are different, the rotor core revolves around the center of the stator core and rotates around the center of the stator core, an epicycloid formed by the outer edge of the rotor core is not meshed with a hypocycloid formed by the stator teeth, an air gap is formed between the epicycloid and the hypocycloid, and the minimum value of the air gap is adjusted by adjusting the farthest distance from the center of the stator core to the outer edge of the permanent magnet. The invention combines the characteristics of the cycloid gear structure, utilizes the electromagnetic field energy to the maximum extent and increases the torque.

Description

Cycloidal-pin gear star-shaped electric transmission mechanism
Technical Field
The invention belongs to the field of motors, and particularly relates to a cycloidal-pin gear star-shaped electric transmission mechanism.
Background
For a general motor, the operation of the motor rotor is realized mainly by means of tangential force. Although there are many new topology and control schemes, the torque is difficult to be significantly increased due to the limitation of materials. The existing motor scheme with partial eccentric shaft utilizes the radial force to drive the motor rotor, but the increase of the torque is limited.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a cycloidal-pin-wheel star-shaped electric transmission mechanism.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a cycloidal-pin-gear star-type electric transmission mechanism comprises a static stator part and a rotating rotor part; the stator part comprises a stator iron core, the stator iron core is used as a pin wheel, stator slots and stator teeth are uniformly formed in the stator iron core, and armature windings are arranged in the stator slots; the rotor part comprises a rotor core and permanent magnets arranged on the rotor core, the rotor core is used as a cycloid wheel, and the NS poles of the permanent magnets are alternately arranged; the permanent magnets are installed in a surface-mounted mode or a built-in mode, and when the permanent magnets are installed in the built-in mode, an isolation bridge is arranged between the adjacent N-pole permanent magnet and the S-pole permanent magnet; when the number of the stator teeth is n, the number of poles of the rotor core is n-1, wherein n is a positive integer greater than 1; the center of a circle of the rotor core is different from that of the stator core, the rotor core revolves around the center of the circle of the stator core, the rotor core rotates around the center of the circle of the rotor core, an epicycloid formed by the outer edge of the rotor core is not meshed with a hypocycloid formed by the stator teeth, an air gap is formed between the epicycloid and the hypocycloid, and the minimum value of the air gap is adjusted by adjusting the farthest distance from the center of the stator core to the outer edge of the permanent magnet.
Further, when the permanent magnet is installed in a built-in mode, the permanent magnet is V-shaped, linear or tile-shaped; the permanent magnet is a single-layer permanent magnet or a multi-layer permanent magnet.
Further, the permanent magnet adopts radial magnetization, radial magnetization or inclined magnetization.
Further, the stator slots are closed slots or open slots.
Further, the armature winding is a three-phase winding, a double three-phase winding or other multi-phase windings.
Further, an armature winding coil is wound on each stator tooth, and the current of each armature winding coil is individually controlled.
Further, the equation for the rotor core edge profile is as follows:
Figure BDA0002633025510000021
Figure BDA0002633025510000022
in the above formula, xcExpressed as x-axis, y, of rotor core edge tooth profilecIs an expression of y-axis of rotor core edge tooth profile, iHIn order to be the relative transmission ratio,
Figure BDA0002633025510000023
zpnumber of stator teeth, zcThe number of the rotor poles is the number of the rotor poles,
Figure BDA0002633025510000025
is the meshing phase angle; a is the distance between the center of the stator and the center of the rotor, rpThe farthest distance r from the center of the stator to the outer edge of the rotorrpThe distance from a point on a circumference taking the farthest distance from the center of a stator circle to the outer edge of the rotor core as a radius to the minimum radius of the outer edge of the rotor is taken as the distance; order to
Figure BDA0002633025510000024
Adopt the beneficial effect that above-mentioned technical scheme brought:
the invention combines the characteristics of a cycloid gear structure to utilize the energy of an electromagnetic field to the maximum extent, after the armature winding is introduced with alternating current, a rotating magnetic field is formed, and the rotating magnetic field drives the rotor to rotate, so that the torque is increased by utilizing not only tangential force but also radial force.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the stator and rotor of the present invention;
FIG. 3 is a schematic view of a rotor core edge profile of the present invention;
FIG. 4 shows the parameter r in the present inventionrpA schematic diagram;
FIG. 5 is a schematic view showing the change in rotor position during rotation of the rotor according to the present invention;
fig. 6-9 are schematic views of different permanent magnet mounting manners in the present invention, respectively.
Description of reference numerals: 1. a stator core; 2. an armature winding; 3. a rotor core; 4. a permanent magnet; 5. a magnetic isolation bridge; 6. a stator slot; 7. a rotor slot; 8. and stator teeth.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
The invention designs a cycloidal-pin-wheel star-shaped electric transmission mechanism, which comprises a static stator part and a rotating rotor part as shown in figure 1. The stator part comprises a stator core 1, stator slots 6 and stator teeth 8 are uniformly arranged on the stator core 1, and armature windings 2 are arranged in the stator slots 6. The rotor part comprises a rotor core 3, permanent magnets 4 are mounted on the rotor core 3, and the NS poles of the permanent magnets are alternately arranged. The rotor core 3 is used as a cycloid wheel, the stator core 1 is used as a pinwheel, the circle centers of the rotor core 3 and the stator core 1 are different, the rotor core 3 revolves around the circle center of the stator core 1, and meanwhile, the rotor core 3 rotates around the circle center of the rotor core 3.
In the present embodiment, the stator slots 6 may be closed slots or open slots. When the number of the stator teeth is n, the number of the poles of the rotor is n-1. The armature winding can adopt a three-phase winding commonly used by a motor, and a three-phase motor controller and an algorithm are adopted; dual three-phase or other multi-phase motor windings may also be employed, with corresponding motor controllers and algorithms. In addition, an armature winding coil may be wound around each stator tooth, and the current of each coil may be individually controlled.
As shown in fig. 2, unlike the conventional cycloid gear transmission in which a pair of concave hypocycloids and convex hypocycloids are engaged with each other in tooth profile, the epicycloid of the outer rim of the rotor is not engaged with the hypocycloid of the stator core, but has an air gap. As shown in fig. 3 and 4, the rotor core edge profile equation is as follows:
Figure BDA0002633025510000041
Figure BDA0002633025510000042
in the above formula, iHIn order to be the relative transmission ratio,
Figure BDA0002633025510000043
zpnumber of stator teeth, zcThe number of the rotor poles is the number of the rotor poles,
Figure BDA0002633025510000044
is the meshing phase angle; a is the distance between the center of the stator and the center of the rotor, rpThe farthest distance r from the center of the stator to the outer edge of the rotorrpThe distance from a point on a circumference taking the farthest distance from the center of a stator circle to the outer edge of the rotor core as a radius to the minimum radius of the outer edge of the rotor is taken as the distance; order to
Figure BDA0002633025510000045
The rotor positions at the rotor rotation angles of 0 °, 10 °, 20 °, 30 °, and 40 ° are shown in the order of (a), (b), (c), (d), and (e) in fig. 5. Taking a three-phase armature winding as an example, when symmetrical three-phase alternating currents with a phase difference of 120 ° are introduced into the armature winding, a rotating magnetic field is formed. The rotating magnetic field attracts the rotor magnetic field to drive the rotor to rotate. Under the drive of the force of the rotating magnetic field, the rotor rotates around the center of a circle of the rotor, and simultaneously the center of the rotor rotates around the center of a circle of the stator.
In this embodiment, the permanent magnet is mounted in a surface-mounted manner or a built-in manner. When the permanent magnets are installed in a built-in mode, an isolation bridge is arranged between the adjacent N-pole permanent magnet and the S-pole permanent magnet. When the permanent magnet is installed in a built-in mode, the permanent magnet is V-shaped, in-line or tile-shaped. The permanent magnet is a single-layer permanent magnet or a multi-layer permanent magnet. The permanent magnet adopts radial magnetization, radial magnetization or inclined magnetization. Fig. 6-8 are schematic views of different permanent magnet installation manners in the present invention, respectively, in which fig. 6 corresponds to surface-mounted installation of the permanent magnet, fig. 7 corresponds to disposing the permanent magnet inside the edge of the rotor core, fig. 8 and 9 correspond to built-in installation of the permanent magnet, respectively, in which fig. 8 is a linear permanent magnet, and fig. 9 is a tile-shaped permanent magnet. The shape of the magnetic isolation bridge can be designed at will according to the torque characteristic requirement of the motor.
The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.

Claims (7)

1. The utility model provides a cycloidal pin wheel star type electric drive mechanism which characterized in that: comprising a stationary stator part and a rotating rotor part; the stator part comprises a stator iron core, the stator iron core is used as a pin wheel, stator slots and stator teeth are uniformly formed in the stator iron core, and armature windings are arranged in the stator slots; the rotor part comprises a rotor core and permanent magnets arranged on the rotor core, the rotor core is used as a cycloid wheel, and the NS poles of the permanent magnets are alternately arranged; the permanent magnets are installed in a surface-mounted mode or a built-in mode, and when the permanent magnets are installed in the built-in mode, an isolation bridge is arranged between the adjacent N-pole permanent magnet and the S-pole permanent magnet; when the number of the stator teeth is n, the number of poles of the rotor core is n-1, wherein n is a positive integer greater than 1; the center of a circle of the rotor core is different from that of the stator core, the rotor core revolves around the center of the circle of the stator core, the rotor core rotates around the center of the circle of the rotor core, an epicycloid formed by the outer edge of the rotor core is not meshed with a hypocycloid formed by the stator teeth, an air gap is formed between the epicycloid and the hypocycloid, and the minimum value of the air gap is adjusted by adjusting the farthest distance from the center of the stator core to the outer edge of the permanent magnet.
2. The cycloidal-pin-gear star electric drive of claim 1, further comprising: when the permanent magnet is installed in a built-in mode, the permanent magnet is V-shaped, in-line or tile-shaped; the permanent magnet is a single-layer permanent magnet or a multi-layer permanent magnet.
3. The cycloidal-pin-gear star electric drive of claim 1, further comprising: the permanent magnet adopts radial magnetization, radial magnetization or inclined magnetization.
4. The cycloidal-pin-gear star electric drive of claim 1, further comprising: the stator slots are closed slots or open slots.
5. The cycloidal-pin-gear star electric drive of claim 1, further comprising: the armature winding is a three-phase winding, a double three-phase winding or other multi-phase windings.
6. The cycloidal-pin-gear star electric drive of claim 1, further comprising: an armature winding coil is wound on each stator tooth, and the current of each armature winding coil is controlled independently.
7. The cycloidal-pin-gear star electric drive of claim 1, further comprising: the equation for the rotor core edge profile is as follows:
Figure FDA0002633025500000021
Figure FDA0002633025500000022
in the above formula, xcExpressed as x-axis, y, of rotor core edge tooth profilecIs an expression of y-axis of rotor core edge tooth profile, iHIn order to be the relative transmission ratio,
Figure FDA0002633025500000023
zpnumber of stator teeth, zcThe number of the rotor poles is the number of the rotor poles,
Figure FDA0002633025500000024
is the meshing phase angle; a is the distance between the center of the stator and the center of the rotor; r ispThe farthest distance from the center of the stator to the outer edge of the rotor; r isrpThe distance from a point on a circumference taking the farthest distance from the center of a stator circle to the outer edge of the rotor core as a radius to the minimum radius of the outer edge of the rotor is taken as the distance; order to
Figure FDA0002633025500000025
CN202010816856.1A 2020-08-14 2020-08-14 Cycloidal-pin gear star-shaped electric transmission mechanism Pending CN112104122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN202010816856.1A CN112104122A (en) 2020-08-14 2020-08-14 Cycloidal-pin gear star-shaped electric transmission mechanism

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008306899A (en) * 2007-06-11 2008-12-18 Nissan Motor Co Ltd Variable airgap motor
JP2008306898A (en) * 2007-06-11 2008-12-18 Nissan Motor Co Ltd Variable airgap motor
JP2018191468A (en) * 2017-05-10 2018-11-29 本田技研工業株式会社 Variable gap type motor
WO2020057321A1 (en) * 2018-09-21 2020-03-26 张朝刚 Enhanced electric motor using planetary gear

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008306899A (en) * 2007-06-11 2008-12-18 Nissan Motor Co Ltd Variable airgap motor
JP2008306898A (en) * 2007-06-11 2008-12-18 Nissan Motor Co Ltd Variable airgap motor
JP2018191468A (en) * 2017-05-10 2018-11-29 本田技研工業株式会社 Variable gap type motor
WO2020057321A1 (en) * 2018-09-21 2020-03-26 张朝刚 Enhanced electric motor using planetary gear

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李群超等: "修形前后摆线针轮接触力和啮合齿数对比", 《国外电子测量技术》 *

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Application publication date: 20201218