KR20160028288A - Salient-pole type magnetic gear - Google Patents
Salient-pole type magnetic gear Download PDFInfo
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- KR20160028288A KR20160028288A KR1020140117201A KR20140117201A KR20160028288A KR 20160028288 A KR20160028288 A KR 20160028288A KR 1020140117201 A KR1020140117201 A KR 1020140117201A KR 20140117201 A KR20140117201 A KR 20140117201A KR 20160028288 A KR20160028288 A KR 20160028288A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H49/00—Other gearings
Abstract
The present invention relates to a magnetic gear, and more particularly, to a magnetic gear in which a magnet of any one of magnetic poles of an inner rotor or an outer rotor, an inner rotor, and an outer rotor is replaced by a pole pole laminated with an iron core to reduce the use of the rare earth permanent magnet To a pole-shaped magnetic gear capable of improving the transmission torque and reducing the torque ripple by improving the shape of the pole piece to concentrate the magnetic flux in the gap.
Description
More particularly, the present invention relates to a magnetic gear, and more particularly, to a magnetic pole in which an iron core is stacked with a magnet of any one of magnetic poles of an inner rotor or an outer rotor, an inner rotor, and an outer rotor to replace the rare earth permanent magnet To a pole-shaped magnetic gear capable of improving the transmission torque and reducing the torque ripple by improving the shape of the pole piece to concentrate the magnetic flux in the gap.
Magnetic gear is a non-contact type gear unit that transmits power in a non-contact manner by using magnetic force. It has less noise and vibration than a gear that transmits power by physical contact, does not require lubricant injection and maintenance, And durability are high.
In addition, since magnetic gears can reduce energy loss, high efficiency driving is possible, and reliability and accurate peak torque can be transmitted.
Recently, efforts have been made to apply magnetic gears to various industries such as wind turbines, electric vehicles, and transmissions.
FIG. 1 shows a general magnetic gear, and FIG. 2 shows a vertical section of a general magnetic gear.
1 and 2, a conventional
The
The magnets of the
When the magnets are arranged in a bipolar manner in the
In addition, when the
The number of dipoles of the
[Mathematical expression a]
Here, N is the number s, p 1 is a bipolar number, p 2 of the
2, the number of poles of the magnet of the
Further, the gear ratio of the
[Mathematical expression b]
In addition, the speed ratio of the rotors of the
[Mathematical expression c]
On the other hand, the
However, due to the morphological limitations of these
[Prior Art Literature]
[Patent Literature]
1. Korean Patent Publication No. 10-2013-0042564, magnetic gear device and retaining member
2. Korean Patent Publication No. 10-2014-0013087, magnetic gear device
It is an object of the present invention to provide a magnetic gear capable of reducing the manufacturing cost by reducing the use of rare earth permanent magnets.
It is also an object of the present invention to provide a magnetic gear capable of improving torque transmission and lowering torque ripple by optimizing the shape of the pole piece to concentrate the magnetic flux in the gap, thereby improving power transmission rate and reliability.
The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.
In order to attain the above object, the present invention provides an internal combustion engine comprising an inner rotor, an outer rotor spaced apart from the inner rotor, and an outer rotor disposed between the inner rotor and the outer rotor, And a pole piece module having a plurality of pole pieces spaced apart from each other for transmitting a magnetic flux from the outer rotor to the inner rotor, wherein at least one of the inner rotor and the outer rotor Wherein the rotor is a salient pole rotor in which a magnet and a salient pole are alternately laminated on the surface of the rotor in a radial direction with respect to the rotating shaft.
In a preferred embodiment, the outer rotor is a rotor type rotor, and the outer rotor is a cylindrical outer rotor; A plurality of magnets (hereinafter, referred to as "outer magnets") attached to the inner surface of the outer rotor in a radial spacing manner about a rotating shaft and having a magnetic force toward the rotating shaft; And an outer salient pole (hereinafter referred to as an outer salient pole) provided between the outer magnets and formed by stacking iron cores on the inner surface of the outer rotor.
In a preferred embodiment, the inner rotor is a salient pole rotor, the inner rotor comprises: a cylindrical inner rotor; A plurality of magnets (hereinafter, referred to as 'inner magnets') radially spaced apart from the outer surface of the inner rotor and having a magnetic force toward the opposite direction of the rotation axis; And an inner salient pole (hereinafter referred to as 'inner salient pole') provided between the inner magnets and formed by stacking iron cores on the outer surface of the inner rotor.
Also, the outer rotor and the inner rotor may each be a rotor type rotor.
In a preferred embodiment, the cross-section of each of the pole pieces has a first arc, a second arc having the same center and center angles as the first arc and an inner diameter smaller than the inner diameter of the first arc, And a second figure surrounded by a line connecting one end and each other end of the second call and a third figure having the same position and inner diameter as the second call and the central angle being larger than the central angle of the second call, 3, the center position and the central angle are the same, the inner diameter is the fourth figure which is smaller than the inner diameter of the third call, and the shape in which the second figure surrounded by the line connecting the one end and the other end of the third call and the fourth call And the bisector positions of the second call and the third call are combined so as to overlap with each other.
In a preferred embodiment, the vertical distance (hereinafter, referred to as 'first vertical distance') between the fourth call and the third call is a vertical distance between the fourth call and the first call , &Quot; second vertical distance ") is larger than 13.5% and smaller than 23.5%.
[Equation 1]
Where alpha is the first vertical distance and L pr is the second vertical distance.
In a preferred embodiment, the central angle of the fourth arc is a central angle of a virtual arc connecting the first calls of two pole pieces with one pole piece interposed therebetween (hereinafter referred to as a 'reference angle' ) Than 40% and less than 50%.
&Quot; (2) "
Where beta is the central angle of the fourth arc and N p is the number of pole pieces.
In a preferred embodiment, a line connecting the first call and the second call in the first figure is a curve concave toward the center of the first figure (hereinafter, referred to as a 'concave curve').
In a preferred embodiment, the length from the bisecting position of the virtual line segment connecting the both ends of the concave curve (hereinafter, referred to as 'first virtual line segment') to the concave curve in the vertical direction (Hereinafter, referred to as " second virtual line segment ") vertically connected to the fourth arc at one end of the concave curve, Is greater than 30% and less than 40% of the length up to a virtual line segment connecting the bisection position of the arc and the bisection position of the fourth line (hereinafter, referred to as 'third virtual line segment').
In a preferred embodiment, the concave length is calculated by the following equation (3).
&Quot; (3) "
Where D pi is the inner diameter of the fourth arc, D po is the inner diameter of the first arc, and N p is the number of pole pieces.
The present invention further provides a multiple type magnetic gear comprising at least two magnetic gears, wherein the output side rotor of the first magnetic gear is directly coupled to the input side rotor of the second magnetic gear do.
Further, the present invention provides the magnetic gear; At least one inner pole piece module spaced apart from the inner rotor of the magnetic gear and having a plurality of pole pieces; And at least one intermediate rotor disposed between the inner pole piece module and the pole piece module of the magnetic gear.
The present invention has the following excellent effects.
First, according to the magnetic gear of the present invention, the outer rotor or the inner rotor, the outer rotor, and the inner rotor are formed of a stator type rotor to reduce the use of the rare earth permanent magnet, thereby lowering the production cost.
According to the magnetic gear of the present invention, it is possible to compensate for torque reduction by adjusting the size of the magnet and the pole, even if the rotor is configured as a pole.
Further, according to the magnetic gear of the present invention, it is possible to concentrate the magnetic fluxes in the air gap by limiting the parameters α, β and γ relating to the cross-sectional shape of the pole piece, thereby improving the torque transmission and lowering the torque ripple, There is an effect that can be made.
Further, according to the multiple type magnetic gear of the present invention, there is an effect that a large torque ratio can be provided even with a small volume by directly connecting two magnetic gears.
In addition, according to the multi-layer type magnetic gear of the present invention, an intermediate rotor is inserted between the outer rotor and the inner rotor to provide a large torque ratio using a small number of magnets.
1 is a view showing a general magnetic gear,
2 is a vertical sectional view of a general magnetic gear,
3 is a view for explaining a magnetic gear according to a first embodiment of the present invention,
4 is a view for explaining a magnetic gear according to a second embodiment of the present invention,
5 is a view for explaining a magnetic gear according to a third embodiment of the present invention,
6 is a view for explaining a pole piece shape of a magnetic gear according to embodiments of the present invention;
7 to 9 are diagrams for explaining a variable for determining the shape of a pole piece of a magnetic gear according to embodiments of the present invention,
10 is a view for explaining a multiple type magnetic gear according to another embodiment of the present invention,
11 is a view for explaining a multilayer type magnetic gear according to another embodiment of the present invention.
Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.
Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.
However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.
3, the
When the
However, when any one of the
In this case, the rotation direction of the rotating piece of the
In FIG. 3, the
The
More specifically, the
The outer
Although the outer
In other words, the
The
In addition, the
The
Further, although not shown, the
Further, the number of the
An outer air gap exists between the
On the other hand, in the
This torque reduction can be compensated by adjusting the magnitude of the
division
Conventional magnetic gears
Lamination width (mm)
(In the direction of the rotation axis
Magnet length)
4, the
In detail, the
4, when the
Although the inner
That is, the
5, the
The
That is, the
Table 2 below shows the comparison between the permanent magnet area and the pull-out torque (torque of the outer rotor) of the conventional
Referring to Table 2, in the
Therefore, it can be confirmed that the
In addition, although the inner rotor torque ripple of the
FIG. 6 is a view for explaining an example of the
6, the shape of the
The first figure 131a has a first arc 131aa which is a curved line and the first arc 131aa and the center c have the same position and a
In other words, the inner radius d2 / 2 of the second arc 131ab is smaller than the inner radius d1 / 2 of the first arc 131aa, the curvatures are equal to each other, and the position of the center c is And coincides with the position of the rotation axis (c).
The lines 131ac and 131ad connecting the first line 131aa and the second line 131ab are curved toward the center of the first
The second figure 131b has the same position and inner diameter d2 as the second arc 131ab and the center c and the
In other words, the inner diameters d2 / 2 of the second arc 131ab and the inner diameters d2 / 2 of the third arc 131ba are the same, and the inner radius d2 / 2 of the third arc 131ba is the same Is larger than the inner radius (d3 / 2) of the arc 131bb.
The lines 131bc and 131bd connecting the ends of the third and fourth circles 131ba and 131bb are preferably straight lines.
The first figure 131a and the second figure 131b are arranged such that the bisection position c1 of the second arc 131ab and the bisection position c1 of the third arc 131ba overlap each other So that the cross-sectional shape of the
FIGS. 7 to 9 illustrate variables that determine the shape of the
Referring to FIG. 7, the first variable is a distance (?) Of a straight line perpendicular to the third and fourth lines 131ba and 131bb.
Further, the first vertical distance? Is set to 13.5 占 퐉 (L pr ', hereinafter referred to as' second vertical distance') between the fourth line 131bb and the first line 131aa, % And smaller than 23.5%.
That is, the first vertical distance? Is designed to satisfy the following equation (1).
Next, referring to FIG. 8, the second variable is the central angle (?) Of the fourth number 131bb.
The central angle beta of the fourth line 131bb is greater than the angle of the first arcs 131'aa and 131'aa of the two pole pieces 131 'and 131' Is greater than 40% and less than 50% of the central angle of the virtual arc connecting the opposite end of the arc (β ', hereinafter referred to as the' reference angle ').
That is, the central angle β of the fourth number 131bb is designed at an angle ranging from 40% to 50% of the reference angle β 'as shown in the following equation (2).
Where N p is the number of pole pieces.
Next, referring to FIG. 9, the third variable is a vertical distance from a bisecting position c2 of a virtual line segment (l1, hereinafter referred to as a first virtual line segment) connecting both ends of a concave curve 131ac (Hereinafter, referred to as a "concave length") to one of the concave curves 131ac.
The concave length may be defined by virtual line segments l2 and l3 perpendicularly connected to the fourth line 131bb at one end 131ac 'of the one concave curve 131ac on the first line 131aa side, (C4) of the first call (131aa) and the bisection position (c5) of the fourth call (131bb) in the vertical direction at the bisection position (c3) (Hereinafter, referred to as a 'reference length') to an imaginary line segment (? 3, hereinafter referred to as a third virtual line segment)
That is, the concave length? Is designed within the range of 30% to 40% of the reference length? 'As shown in Equation 3 below.
Here, D pi is the inner diameter d3 of the fourth arc 131bb, D po is the inner diameter d1 of the first arc 131aa, and N p is the number of the
In Equation 3, denominator refers to the reference length y ', which is defined as a straight line passing through points c5 and c4 with the first imaginary line segment l3 being the x axis on a rectangular coordinate system centered on the origin c. And the y-axis coordinate value of the intersection of the straight line passing through the points c3 and c6. However, the reference length? 'Can be calculated by various methods.
Table 3 below shows the shape of the
talk
As can be seen from Table 3, when the
10 is a view for explaining a multiple type magnetic gear according to another embodiment of the present invention.
Referring to FIG. 10, the multiple type
In FIG. 10, a dual type magnetic gear is shown in which two
In the case of the dual type, the
When power is transmitted from the first
The gear ratio between the
In other words, when the conventional
11 is a view for explaining a multilayer type magnetic gear according to another embodiment of the present invention.
Referring to FIG. 11, the multi-layer type
The number of the inner
The inner
Also, the shape of the
The
That is, in the multi-layer type
In FIG. 11, the
In addition, when the driving force is transmitted from the
Therefore, according to the multi-layer type
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.
100, 100a, 100b: magnetic gear 110: outer rotor
111:
112: outer magnet 120: inner rotor
121:
122: inner magnet 200: multiple type magnetic gear
300: Multilayer type magnetic gear
Claims (12)
Wherein at least one of the inner rotor and the outer rotor is a salient pole rotor in which a magnet and a salient pole are alternately laminated on the surface in a radial direction with respect to the rotation axis.
The outer rotor is a stator type rotor,
The outer rotor:
A cylindrical outer rotor;
A plurality of magnets (hereinafter, referred to as "outer magnets") attached to the inner surface of the outer rotor in a radial spacing manner about a rotating shaft and having a magnetic force toward the rotating shaft; And
And a plurality of salient poles (hereinafter referred to as outer salient poles) provided between the outer magnets and formed by stacking iron cores on the inner surface of the outer rotors.
Wherein the inner rotor is a stator-
The inner rotor:
A cylindrical inner rotor;
A plurality of magnets (hereinafter, referred to as 'inner magnets') radially spaced apart from the outer surface of the inner rotor and having a magnetic force toward the opposite direction of the rotation axis; And
And an inner salient pole (hereinafter referred to as 'inner salient pole') provided between the inner magnets and formed by stacking iron cores on the outer surface of the inner rotor.
Wherein the outer rotor and the inner rotor are each a rotor type rotor,
The outer rotor:
A cylindrical outer rotor;
A plurality of magnets (hereinafter, referred to as "outer magnets") attached to the inner surface of the outer rotor in a radial spacing manner about a rotating shaft and having a magnetic force toward the rotating shaft; And
And an outer salient pole (hereinafter referred to as an outer salient pole) provided between the outer magnets and formed by laminating iron cores on the outer rotor,
The inner rotor:
A cylindrical inner rotor;
A plurality of magnets (hereinafter, referred to as 'inner magnets') radially spaced apart from the outer surface of the inner rotor and having a magnetic force toward the opposite direction of the rotation axis; And
And a plurality of salient poles (hereinafter referred to as " inner salient poles ") formed between the inner magnets and formed by laminating iron cores on the inner rotors.
The cross-section of each of the pole pieces,
A first arc and a second arc having the same center position and center angle as the first arc and having an inner diameter smaller than the inner diameter of the first arc and a second arc having a first arc and a second arc, A first figure surrounded by a line,
And a center angle of the second arc is equal to a center angle of the second arc, a central angle of the third arc is greater than a central angle of the second arc, a central position and a center angle of the third arc are the same, and an inner diameter of the fourth arc is smaller than an inner diameter of the third arc And a second figure surrounded by a line connecting one end and each other end of the third and fourth arcs,
Wherein a bisecting position of the second arc and a bisecting position of the third arc are combined to each other so as to overlap with each other.
The vertical distance between the fourth call and the third call (hereinafter, referred to as a 'first vertical distance') may be expressed by the following equation (1) Quot;) is greater than 13.5% and less than 23.5%.
[Equation 1]
Where alpha is the first vertical distance and L pr is the second vertical distance.
The central angle of the fourth arc is larger than 40% of the central angle of the virtual arc connecting the first calls of the two pole pieces with one pole piece interposed therebetween (hereinafter referred to as a reference angle) Magnetic gear characterized by less than 50%.
&Quot; (2) "
Where beta is the central angle of the fourth arc and N p is the number of pole pieces.
Wherein a line connecting the first call and the second call in the first figure is a curve concave toward the center of the first figure (hereinafter, referred to as 'concave curve').
(Hereinafter referred to as a "concave length") in the vertical direction at the bisecting position of a virtual line segment connecting the both ends of the concave curve (hereinafter, referred to as a "first virtual line segment"),
(2) of the first arc in the vertical direction at a bisecting position of a virtual line segment (hereinafter, referred to as a second virtual line segment) connected at a first call side end of the concave curve in a direction perpendicular to the fourth arc Of the length to a virtual line segment (hereinafter, referred to as a 'third virtual line segment') connecting the bisection positions of the fourth arc.
Wherein the concave length is calculated by the following equation (3).
&Quot; (3) "
Where D pi is the inner diameter of the fourth arc, D po is the inner diameter of the first arc, and N p is the number of pole pieces.
Wherein the output side rotor of the first magnetic gear is directly connected to the input side rotor of the second magnetic gear, among the magnetic gears.
At least one inner pole piece module spaced apart from the inner rotor of the magnetic gear and having a plurality of pole pieces; And
And at least one intermediate rotor disposed between the inner pole piece module and the pole piece module of the magnetic gear.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140117201A KR101669984B1 (en) | 2014-09-03 | 2014-09-03 | Salient-pole type magnetic gear |
| PCT/KR2015/009200 WO2016036116A1 (en) | 2014-09-03 | 2015-09-01 | Salient pole-type magnetic gear |
| CN201580001607.4A CN106165275B (en) | 2014-09-03 | 2015-09-01 | Salient pole type magnetic gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140117201A KR101669984B1 (en) | 2014-09-03 | 2014-09-03 | Salient-pole type magnetic gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20160028288A true KR20160028288A (en) | 2016-03-11 |
| KR101669984B1 KR101669984B1 (en) | 2016-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020140117201A KR101669984B1 (en) | 2014-09-03 | 2014-09-03 | Salient-pole type magnetic gear |
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| Country | Link |
|---|---|
| KR (1) | KR101669984B1 (en) |
| CN (1) | CN106165275B (en) |
| WO (1) | WO2016036116A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276367B (en) * | 2017-06-30 | 2020-05-05 | 武汉理工大学 | Electromagnetic slip clutch based on magnetic gear effect |
| EP3501753B1 (en) * | 2017-12-21 | 2021-03-31 | Guido Valentini | Hand guided and/or hand held electric or pneumatic power tool |
| EP3501755B1 (en) * | 2017-12-21 | 2021-03-31 | Guido Valentini | Electric machine comprising an electric motor and a gear arrangement and electric power tool comprising such a machine |
| KR20200127447A (en) * | 2019-05-02 | 2020-11-11 | 현대자동차주식회사 | Magnetic gear using a can |
| KR20210030082A (en) * | 2019-09-09 | 2021-03-17 | 에스엘 주식회사 | Magnetic gear apparatus |
| CN111082622A (en) * | 2020-01-10 | 2020-04-28 | 南京航空航天大学 | Decoupling type birotor alternating pole permanent magnet motor |
| JP7090828B1 (en) * | 2021-11-18 | 2022-06-24 | 三菱電機株式会社 | Permanent magnet type rotary electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010223340A (en) * | 2009-03-24 | 2010-10-07 | Hitachi Metals Ltd | Magnetic gear and method of manufacturing the same |
| JP2012219907A (en) * | 2011-04-08 | 2012-11-12 | Toyota Central R&D Labs Inc | Speed converter using magnetic wave gear |
| JP2014017983A (en) * | 2012-07-09 | 2014-01-30 | Nissei Corp | Power generator |
| WO2014128985A1 (en) * | 2013-02-22 | 2014-08-28 | 株式会社Ihi | Magnetic wave gear device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267152B (en) * | 2008-04-21 | 2010-07-07 | 上海大学 | Magnetic field modulation magnetic gear |
| EP2390994A1 (en) * | 2010-05-26 | 2011-11-30 | Delphi Technologies, Inc. | Magnetic gear and power split transmission using such |
| JP5404718B2 (en) * | 2011-08-29 | 2014-02-05 | 株式会社ニッセイ | Magnetic gear unit |
-
2014
- 2014-09-03 KR KR1020140117201A patent/KR101669984B1/en active IP Right Grant
-
2015
- 2015-09-01 CN CN201580001607.4A patent/CN106165275B/en active Active
- 2015-09-01 WO PCT/KR2015/009200 patent/WO2016036116A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010223340A (en) * | 2009-03-24 | 2010-10-07 | Hitachi Metals Ltd | Magnetic gear and method of manufacturing the same |
| JP2012219907A (en) * | 2011-04-08 | 2012-11-12 | Toyota Central R&D Labs Inc | Speed converter using magnetic wave gear |
| JP2014017983A (en) * | 2012-07-09 | 2014-01-30 | Nissei Corp | Power generator |
| WO2014128985A1 (en) * | 2013-02-22 | 2014-08-28 | 株式会社Ihi | Magnetic wave gear device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101669984B1 (en) | 2016-10-27 |
| WO2016036116A1 (en) | 2016-03-10 |
| CN106165275B (en) | 2018-11-09 |
| CN106165275A (en) | 2016-11-23 |
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