WO2010122389A1 - Appareil de transmission sans contact - Google Patents
Appareil de transmission sans contact Download PDFInfo
- Publication number
- WO2010122389A1 WO2010122389A1 PCT/IB2010/000843 IB2010000843W WO2010122389A1 WO 2010122389 A1 WO2010122389 A1 WO 2010122389A1 IB 2010000843 W IB2010000843 W IB 2010000843W WO 2010122389 A1 WO2010122389 A1 WO 2010122389A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- primary
- secondary coil
- coil
- pattern
- coils
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title description 13
- 230000008878 coupling Effects 0.000 claims abstract description 32
- 238000010168 coupling process Methods 0.000 claims abstract description 32
- 238000005859 coupling reaction Methods 0.000 claims abstract description 32
- 230000009351 contact transmission Effects 0.000 claims abstract description 17
- 238000007373 indentation Methods 0.000 description 8
- 230000008054 signal transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/266—One coil at each side, e.g. with primary and secondary coils
Definitions
- the present invention relates to a non-contact transmission apparatus which transmits or receives a power or an electric signal through at least one pair of coils in a non-contact fashion.
- a non-contact transmission apparatus has recently been in the spotlight, wherein a power or an electric signal is transmitted and received between two electric devices in a non-contact fashion.
- a portable terminal is mounted on a charger and thus charged in the non-contact fashion.
- a position of the secondary coil may be relatively deviated with regard to that of the primary coil, thereby changing a coupling coefficient therebetween. Accordingly, a charging efficiency and a signal transmission efficiency may be lowered.
- some conventional methods have been disclosed (see, e.g., Japanese Patent No. 3887828 and corresponding U.S. patent No. 6265789 Bl; and Japanese Patent Application Publication No. 2008-289241) .
- the charging efficiency and the signal transmission efficiency may be improved by determining a ratio of the inner diameter of the primary coil to the outer diameter thereof and a ratio of the inner diameter of the secondary coil to the outer diameter thereof, or a mutual relationship between the inner and the outer diameter of each of the primary coil and the secondary coil when a relative position deviation of the secondary coil with regard to the primary coil occurs.
- the power or the electric signal may be unable to be transmitted and received with a same magnitude both in the normal case that no position deviation occurs between the coils and in the case that the position deviation occurs therebetween.
- the reliability of the transmission and the reception of the power or the electric signal may be deteriorated.
- the present invention provides a non-contact transmission apparatus capable of transmitting and receiving a power or a signal with a same magnitude as that of the normal case even though a position deviation occurs between coils.
- a non-contact transmission apparatus including a primary coil for transmitting a power or an electric signal by a magnetic coupling; and a secondary coil for receiving the power or the electric signal transmitted from the primary coil through a magnetic coupling, the secondary coil being arranged to oppositely face the primary coil.
- the primary coil and the secondary coil are arranged in a reference pattern or one or more deviated patterns where the position of the secondary coil with respect to the primary coil is different from that in the reference pattern, and at least one of factors is set such that a coupling coefficient between the primary coil and the secondary coil in the reference pattern is identical to that in each of the deviated patterns, the factors having inner or outer diameters of the primary and the secondary coil; a relative position between the primary and the secondary coil on a plane that is in parallel with oppositely facing surfaces of the coils,- and an inclination angle at which the secondary coil is inclined with regard to the primary coil.
- the primary and the secondary coil is provided in a plural number, and the primary coil or secondary coils are adjacently arranged on a same planar surface such that the coupling coefficient in the deviated pattern is identical to that in the reference pattern.
- the apparatus may further include a positioning part provided, to position each of the primary and the secondary- coil, at a predetermined portion on the plane that is in parallel with the oppositely facing surfaces of the coils such that the coupling coefficient in the deviated pattern is identical to that in the reference pattern, when the inner and outer diameters of the primary and the secondary coil are regular and the inclination angle at which the secondary coil is inclined with regard to the primary coil in the deviated pattern is different from that in the reference pattern.
- a positioning part provided, to position each of the primary and the secondary- coil, at a predetermined portion on the plane that is in parallel with the oppositely facing surfaces of the coils such that the coupling coefficient in the deviated pattern is identical to that in the reference pattern, when the inner and outer diameters of the primary and the secondary coil are regular and the inclination angle at which the secondary coil is inclined with regard to the primary coil in the deviated pattern is different from that in the reference pattern.
- the apparatus may further include an inclination maintaining unit provided to maintain an inclination angle at which one of the primary coil and the secondary coil is inclined with regard to the other such that the coupling coefficient in the deviated pattern is identical to that in the reference pattern, when the relative position between the primary and the secondary coil is regular on the plane that is in parallel with the oppositely facing surfaces of the coils in the deviated pattern and the inner or outer diameter of at least one of the primary and the secondary coil in the deviated pattern is different from that in the reference pattern.
- an inclination maintaining unit provided to maintain an inclination angle at which one of the primary coil and the secondary coil is inclined with regard to the other such that the coupling coefficient in the deviated pattern is identical to that in the reference pattern, when the relative position between the primary and the secondary coil is regular on the plane that is in parallel with the oppositely facing surfaces of the coils in the deviated pattern and the inner or outer diameter of at least one of the primary and the secondary coil in the deviated pattern is different from that in the reference pattern.
- Figs. IA and IB show a non-contact transmission apparatus in accordance with a first embodiment of the present invention and, specifically, Fig. IA shows a relationship between coils in a reference pattern and Fig.
- IB shows a relationship between coils in a deviated pattern
- Figs. 2A to 2C are graphs showing a relationship between an inner diameter of a primary coil and a coupling coefficient when an inner diameter of a secondary coil is variously changed.
- Figs. 3A to 3C show a non-contact transmission apparatus in accordance with a second embodiment of the present invention and, specifically, Fig. 3A is a plan view showing primary coils and Figs. 3B and 3C are side cross sectional views showing the primary coils and the secondary coil;
- Figs. 4A to 4C show a non-contact transmission apparatus in accordance with a third embodiment of the present invention and, specifically, Fig. 4A is a side view showing a first device body and Figs. 4B and 4C show how a second device body is coupled to the first device body in accordance with two methods, respectively; and
- Figs. 5A and 5B show a non-contact transmission apparatus in accordance with a fourth embodiment of the present invention and, specifically, Fig. 5A is a side view showing a position relationship between coils when a secondary coil has a large inner diameter and Fig. 5B is a side view showing a position relationship between coils when a secondary coil has a small inner diameter.
- a non-contact transmission apparatus in accordance with a first embodiment of the present invention will be described with reference to Figs. IA to 2C.
- the upper and the lower side shown in a vertical cross sectional view of Fig. IA are referred to as the upper and the lower direction, respectively, in the below.
- the non-contact transmission apparatus in accordance with the first embodiment includes a primary coil 1 for transmitting a power or an electric signal through the magnetic coupling and a secondary coil 2 for receiving the power or the electric signal from the primary coil through the magnetic coupling, the secondary coil being arranged to oppositely face the primary coil .
- the present embodiment has a feature that inner diameters rl and r2 of the coils 1 and 2 are respectively set such that a coupling coefficient k between the coils 1 and 2 in a reference pattern as shown in Fig. IA is the same as that in a deviated pattern as shown in Fig. IB.
- IA is set as the reference pattern, wherein the position of the secondary coil 2 with respect to the primary coil 1 is referenced.
- a pattern shown in Fig. IB is set as the deviated pattern, wherein the position of the secondary coil 2 with respect to the primary coil 1 is different from that in the reference pattern.
- the primary coil 1 is a substantially ring-shaped empty core coil having an inner and an outer diameter rl and Rl and includes a top surface serving as a transmission surface for transmitting a power or an electric signal .
- the primary coil 1 further includes a substantially disk-shaped magnetic sheet 10 provided on a bottom surface thereof opposite to the transmission surface, the magnetic sheet 10 having a substantially same outer diameter as that of the primary coil 1.
- the magnetic sheet 10 serves to increase an inductance of the primary coil 1.
- the secondary coil 2 is a substantially ring-shaped empty core coil having an inner and an outer diameter r2 and R2 and includes a bottom surface serving as a reception surface for receiving a power or an electric signal transmitted from the primary coil ' l.
- the secondary coil 2 further includes a substantially disk-shaped magnetic sheet 20 provided on a top surface thereof opposite to the reception surface, the magnetic sheet 20 having a substantially same outer diameter as that of the secondary coil 2.
- the magnetic sheet 20 serves to increase an inductance of the secondary coil 2.
- a central axis of the secondary coil 2 is the same as that of the primary coil 1 and a distance d between the primary and the secondary coil 1 and 2 is set to be 5.3 mm.
- the central axis of the secondary coil 2 is horizontally deviated from that of the primary coil 1 by a predetermined distance g, e.g., 6 mm and the distance d therebetween is set to be 3.3 mm.
- the outer diameter Rl and the thickness tl of the primary coil 1 are set to be 30 mm and 0.17 mm, respectively.
- the outer diameter R2 and the thickness t2 of the secondary coil 2 are set to be 15 mm and 0.3 mm, respectively.
- the thicknesses tlO and t20 of the magnetic sheets 10 and 20 are set to be 1 mm and 0.02 mm, respectively. Further, the transmission surface of the primary coil 1 is in parallel with the reception surface of the secondary coil 2 and the secondary coil 2 is not inclined with regard to the primary coil 1.
- Figs. 2A to 2C are graphs showing relationships between the inner diameter rl of the primary coil 1 and the coupling coefficient k between the coils 1 and 2 when the inner diameter r2 of the secondary coil 2 is set to be 3 mm, 6 mm, and 9 mm, respectively: From the graphs shown in Figs. 2A to 2C, it may be seen that there are values of the inner diameter rl of the primary coil 1 that make the coupling coefficient k of the reference pattern be the same as that of the deviated pattern in any case where the inner diameter r2 of the secondary coil 2 is set to be about 3 mm, 6 mm, or 9 mm.
- the relative position relationship between the primary and the secondary coil 1 and 2 is merely an example for the relationship between the reference pattern and the deviated pattern.
- the relationship therebetween is not limited thereto.
- the deviated pattern may be configured in various ways such that the coupling coefficient in the deviated pattern is the same as that in the reference pattern.
- the second embodiment has a feature that a plurality of primary coils 1 (e.g., 4 primary coils 1 in Fig. 3A) are adjacently positioned on a same planar surface.
- a plurality of primary coils 1 e.g., 4 primary coils 1 in Fig. 3A
- an inner and an outer diameter of the primary coils 1 are regular
- an inner and an outer diameter of the secondary coil 2 are regular
- a distance between the primary coils 1 and the secondary coil 2 is regular.
- the transmission surfaces of the primary coils 1 are in parallel with the reception surface of the secondary coil 2 and the secondary coil 2 is not inclined with regard to the primary coils 1.
- FIG. 3B is set as a reference pattern, wherein a center of the secondary coil 2 is positioned on a central axis of one of the primary coils 1.
- a pattern shown in Fig. 3C is referred to as a deviated pattern, wherein the secondary pattern 2 is positioned across any adjacent two primary coils 1.
- a ratio of magnetic force lines passing through the secondary coil 2 to those generated by the primary coils 1 in the reference pattern is the same as that in the deviated pattern.
- the coupling coefficient between the coils 1 and 2 in the reference pattern is the same as that in the deviated pattern, it is possible to obtain the same effect as that of the first embodiment.
- a plurality of primary coils 1 is adjacently arranged in the present embodiment.
- a plurality of secondary coils 2 may be adjacently arranged instead of the primary coils 1.
- the third embodiment features a shape of a first device body 3, the first device body 3 having a primary coil 1 therein; and a positioning part for allowing a second device body 4 having therein a secondary coil 2 to be coupled to the first device body 3 at a predetermined portion thereof.
- an inner and an outer diameter of the primary coil 1 are regular
- an inner and an outer diameter of the secondary coil 2 are regular
- a distance between the primary coil 1 and the secondary coil 2 is regular.
- such combination of the first and the second device body 3 and 4 includes, e.g., the combination of a charger and a portable terminal, but is not limited thereto.
- the combination thereof may include combinations of any other apparatuses having the primary and the secondary coil 1 and 2, respectively.
- the positioning part includes a first positioning part and a second positioning part.
- the first positioning part includes a flat surface 30 that is in parallel with a surface on which the primary coil 1 is mounted; and an indentation 31 provided in a same planar surface as that of the flat surface 30, the indentation 31 having a substantially right-triangle shaped cross section.
- the second device body 4 is partially mounted on the indentation 31.
- the second positioning part includes a flat surface 32 that is inclined with regard to the surface on which the primary coil 1 is mounted; and an indentation 33 provided in a same planar surface as that of the flat surface 32, the indentation 33 having a substantially right-triangle shaped cross section.
- the second device body 4 is partially mounted on the indentation 33.
- a center of the secondary coil 2 is deviated from a central axis of the primary coil 1.
- the center of the secondary coil 2 is positioned on the central axis of the primary coil 1.
- a pattern shown in Fig. 4B is set as a reference pattern, wherein the transmission surface of the primary coil 1 is in parallel with the reception surface of the secondary coil 2.
- a pattern shown in Fig. 4C is set as a deviated pattern, wherein the reception surface of the secondary coil 2 is inclined at a predetermined angle with reference to the transmission surface of the primary coil 1.
- the second device body 4 is coupled to the first device body 3 on the first positioning part in the reference pattern and on the second positioning part in the deviated pattern.
- the coupling coefficient in the deviated pattern can be made identical to that in the reference pattern. Accordingly, it is possible to obtain the same effect as that of the first embodiment.
- the relative position relationship between the primary and the secondary coil 1 and 2 is merely an example for the relationship between the reference pattern and the deviated pattern.
- the relationship between the reference pattern and the deviated pattern is not limited thereto.
- the configuration of the positioning part is not limited to the present embodiment.
- the positioning part may be configured in various ways such that the coupling coefficient in the reference pattern is the same as that in the deviated pattern.
- the fourth embodiment features an inclination maintaining unit 7 for maintaining a predetermined angle at which a secondary coil 6 of a third device body 5 is inclined with regard to the primary coil 1 of a first device body 3' .
- an inner and an outer diameter of the primary coil 1 are regular and a distance between the primary coil 1 and the secondary coil 2 is regular.
- a center of the secondary coil 2 is positioned on a central axis of the primary coil 1.
- such combination of the first and the second device body 3' and 4 includes, e.g., a combination of a charger and a portable terminal, but is not limited thereto as in the third embodiment.
- the combination thereof may include combinations of any other apparatuses having the primary and the secondary coil 1 and 2, respectively.
- the second device body 4 having therein the secondary coil 2 whose outer diameter is smaller than that of the primary coil 1 and the third device body 5 having the secondary coil 6 whose outer diameter is substantially identical to that of the primary coil 1 are respectively coupled to the first device body 3' .
- a pattern shown in Fig. 5A is set as a reference pattern, wherein the second device body 4 is mounted on the first device body 3' .
- a pattern shown in Fig. 5B is set as a deviated pattern, wherein the third device body 5 is mounted on the first device body 3 ' . For example, if the transmission surface of the primary coil 1 is in parallel with the reception surface of the secondary coil 6 in the deviated pattern, the coupling coefficient in the deviated pattern becomes different from that in the reference pattern.
- the coupling coefficient in the deviated pattern it is possible to allow the coupling coefficient in the deviated pattern to be the same as that in the reference pattern by maintaining a predetermined angle at which the secondary coil 6 of the third device body 5 is inclined with regard to the primary coil 1 of the first device body 3' by the inclination maintaining unit 7. Accordingly, even when the same device (the first device body 3' in the present embodiment) is used for a plurality of devices having coils of different sized diameters (the second and the third device body 4 and 5 in the present embodiment) , a power or a signal can be transmitted and received with the same magnitude, thereby preventing a reliability of transmission and reception of a power or a signal from being deteriorated.
- the inclination maintaining unit 7 is provided in the third device body 5 as described above.
- the inclination maintaining unit 7 may be provided in the first device body 3' to maintain a predetermined angel at which the primary coil 1 of the first device body 3' is inclined with regard to the secondary coil 6 of the third device body 5. It is possible to obtain the same effect as described above in even this case.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
L'invention porte sur un appareil de transmission sans contact qui comprend une bobine primaire pour la transmission d'une puissance ou d'un signal par un couplage magnétique ; et une bobine secondaire pour recevoir la puissance ou le signal, les bobines étant disposées de façon à être dirigées en regard l'une à l'autre. Les bobines sont agencées dans un motif de référence ou dans un ou plusieurs motifs déviés dans lesquels la position de la bobine secondaire par rapport à la bobine primaire est différente de celle du motif de référence, et au moins l'un des facteurs est réglé de telle sorte qu'un coefficient de couplage entre les bobines du motif de référence est identique à celui de chacun des motifs déviés, les facteurs présentant les diamètres internes ou externes des bobines ; une position relative entre les bobines sur un plan qui est parallèle aux surfaces dirigées de manière opposée des bobines, et un angle auquel la bobine secondaire est inclinée par rapport à la bobine primaire.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-104440 | 2009-04-22 | ||
JP2009104440A JP2010259171A (ja) | 2009-04-22 | 2009-04-22 | 非接触伝送装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010122389A1 true WO2010122389A1 (fr) | 2010-10-28 |
Family
ID=42557523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2010/000843 WO2010122389A1 (fr) | 2009-04-22 | 2010-04-15 | Appareil de transmission sans contact |
Country Status (2)
Country | Link |
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JP (1) | JP2010259171A (fr) |
WO (1) | WO2010122389A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2860841A1 (fr) * | 2013-10-04 | 2015-04-15 | TDK Corporation | Dispositif de réception de puissance et dispositif d'alimentation en énergie |
US9130386B2 (en) | 2011-02-17 | 2015-09-08 | Fujitsu Limited | Wireless power transmitting device and wireless power transmission system having a variable distance between a feeding surface and a power transmitting coil |
EP2773018A4 (fr) * | 2011-10-27 | 2016-05-18 | Toyota Motor Co Ltd | Appareil de réception d'énergie sans contact, appareil de transmission d'énergie sans contact et système de transmission/réception d'énergie sans contact |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013118482A1 (fr) * | 2012-02-10 | 2013-08-15 | パナソニック株式会社 | Bobine de transmission de puissance |
JP5613268B2 (ja) * | 2013-01-10 | 2014-10-22 | 昭和電線デバイステクノロジー株式会社 | 非接触給電システム |
JP2016073059A (ja) * | 2014-09-29 | 2016-05-09 | セイコーインスツル株式会社 | 非接触電力伝送装置、非接触電力伝送装置を搭載した電子機器、非接触電力伝送装置の製造方法 |
CN104976258A (zh) * | 2015-06-24 | 2015-10-14 | 黄晓霜 | 环保型刹车片 |
JP2017063521A (ja) * | 2015-09-24 | 2017-03-30 | 日東電工株式会社 | 受給電装置 |
JP2021057960A (ja) * | 2019-09-27 | 2021-04-08 | オムロン株式会社 | 非接触給電装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1318206A (en) * | 1970-03-23 | 1973-05-23 | Ass Eng Ltd | Inductive coupling |
US6265789B1 (en) * | 1997-11-20 | 2001-07-24 | Seiko Epson Corporation | Electronic apparatus |
-
2009
- 2009-04-22 JP JP2009104440A patent/JP2010259171A/ja not_active Withdrawn
-
2010
- 2010-04-15 WO PCT/IB2010/000843 patent/WO2010122389A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1318206A (en) * | 1970-03-23 | 1973-05-23 | Ass Eng Ltd | Inductive coupling |
US6265789B1 (en) * | 1997-11-20 | 2001-07-24 | Seiko Epson Corporation | Electronic apparatus |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9130386B2 (en) | 2011-02-17 | 2015-09-08 | Fujitsu Limited | Wireless power transmitting device and wireless power transmission system having a variable distance between a feeding surface and a power transmitting coil |
EP2773018A4 (fr) * | 2011-10-27 | 2016-05-18 | Toyota Motor Co Ltd | Appareil de réception d'énergie sans contact, appareil de transmission d'énergie sans contact et système de transmission/réception d'énergie sans contact |
US9697952B2 (en) | 2011-10-27 | 2017-07-04 | Toyota Jidosha Kabushiki Kaisha | Non-contact electric power reception device, non-contact electric power transmission device, and non-contact electric power transmission and reception system |
EP2860841A1 (fr) * | 2013-10-04 | 2015-04-15 | TDK Corporation | Dispositif de réception de puissance et dispositif d'alimentation en énergie |
CN104518576A (zh) * | 2013-10-04 | 2015-04-15 | Tdk株式会社 | 受电装置和供电装置 |
US10090717B2 (en) | 2013-10-04 | 2018-10-02 | Tdk Corporation | Power receiving device and power feeding device |
Also Published As
Publication number | Publication date |
---|---|
JP2010259171A (ja) | 2010-11-11 |
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