WO2014130065A1 - Bobine spirale à pas variable - Google Patents

Bobine spirale à pas variable Download PDF

Info

Publication number
WO2014130065A1
WO2014130065A1 PCT/US2013/031128 US2013031128W WO2014130065A1 WO 2014130065 A1 WO2014130065 A1 WO 2014130065A1 US 2013031128 W US2013031128 W US 2013031128W WO 2014130065 A1 WO2014130065 A1 WO 2014130065A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
spiral
coil
circuit device
planar
Prior art date
Application number
PCT/US2013/031128
Other languages
English (en)
Inventor
Joshua K. Schwannecke
David W. Baarman
Matthew J. Norconk
Ronald L. Stoddard
Joshua B. Taylor
Colin J. Moore
Original Assignee
Access Business Group International Llc
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 Access Business Group International Llc filed Critical Access Business Group International Llc
Publication of WO2014130065A1 publication Critical patent/WO2014130065A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2871—Pancake coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings

Definitions

  • the present invention relates to contactless power supply systems and more particularly to inductive coils for use in contactless power supply systems.
  • Contactless power supply systems include the transfer of electrical energy from a power supply to one or more portable devices without mechanical connection.
  • a typical contactless power supply drives a time-varying current through a primary coil to create a time-varying electromagnetic field.
  • One or more portable devices can each include a secondary coil. When the secondary coil is placed in proximity to the time-varying electromagnetic field, the field induces an alternating current in the secondary coil, thereby transferring power from the contactless power supply to the portable device.
  • Power transfer can be improved by varying a number of parameters. For example, power transfer can be improved by tuning the coupling coefficient—which relates to the relative geometry of the primary and secondary coils. Further by example, power transfer can be improved with the introduction of a ferrite core element, or with the addition of one or more resonator coils.
  • a contactless power supply can include a resonator coil and a portable device can include a resonator coil. In this four-coil configuration, the primary coil (L1) is paired with a resonator coil (L2), and the secondary coil (L4) is paired with a resonator coil (L3).
  • the resonator coils (L2 and L3) cooperate to enhance inductive power transfer, particularly in mid-range applications.
  • the inductive coil for a contactless power supply system.
  • the inductive coil includes a conductive element in a planar spiral pattern, wherein the pitch between adjacent spirals is greater near the center of the spiral pattern than near the outer periphery of the spiral pattern.
  • the inductive coil can be used as any one of a primary coil, a primary side resonator coil, a secondary side resonator coil, and/or a secondary coil to increase the overall efficiency of a power supply system across a range of distances and alignment orientations, and for a range of contactless power supply applications.
  • the inductive coil includes a conductive element in a planar spiral pattern, wherein the pitch between adjacent spirals of the planar spiral pattern progressively decreases with successive turns of the spiral pattern.
  • the spirals are spaced apart from the center of the spiral pattern by a distance that increases in proportion to a square root curve, such that the spirals group together near the outer periphery of the spiral pattern.
  • the inductive coil includes a conductive element in a planar spiral pattern having an innermost spiral, an outermost spiral, and a plurality of intermediate spirals, wherein the pitch between the innermost spiral and its adjacent spiral is greater than the pitch between any two adjacent intermediate spirals when measured along a radial extending from the center of the spiral pattern to the outer periphery of the spiral pattern.
  • the inductive coil includes a conductive element in a planar spiral pattern, wherein the pitch between adjacent spirals progressively decreases over a first portion of the spiral pattern, and wherein the pitch between adjacent spirals remains substantially constant over a second portion of the planar spiral pattern, the second portion being radially outward of the first portion.
  • the inductive coil includes a conductive element in a planar spiral pattern, wherein the pitch between adjacent spirals is greater in some areas than in other areas.
  • the pitch can increase over a first portion of the spiral pattern, and then decrease over a second portion of the spiral pattern before increasing again over a third portion of the spiral pattern.
  • the pitch can decrease over a first portion of the spiral pattern, and then increase over a second portion of the spiral pattern before decreasing again over a third portion of the spiral pattern.
  • the inductive coil is a primary side resonator coil interposed between a power transfer surface and a primary coil.
  • the resonator coil includes a conductive element in a planar spiral pattern, wherein the adjacent spirals having a first spiral density near the center of the spiral pattern less than a second spiral density near the outer periphery of the spiral pattern.
  • the primary coil is generally coextensive with the spirals nearer to the outer periphery, thereby reducing the coupling between the primary coil and a secondary coil positioned on or above the power transfer surface.
  • the inductive coil includes a conductive element in a circular spiral pattern, a square spiral pattern, an oval spiral pattern, a rectangular spiral pattern, a logarithmic spiral pattern, a fractal spiral pattern, including first and second order fractals, or other spiral pattern.
  • the conductive element can include a conductive wire winding, a printed trace winding, a Litz wire, or other conductive element, optionally electrically connected in series with a capacitive element to provide a tuned resonant frequency.
  • the inductive coil can include a core element, for example a ferrite core element, while in other embodiments the inductive coil can be free from any core, being generally coreless.
  • Embodiments of the invention can therefore provide an improved inductive coil for contactless power supply systems and other circuit devices, including for example drive electronics.
  • the inductive coil When used as a primary coil or as a primary side resonator coil, the inductive coil enables wireless power to multiple devices over a larger area over known systems.
  • the variable pitch spiral pattern can increase the minimum coupling coefficient in a target charging area, while also reducing the maximum coupling coefficient. This in turn enables the secondary coil to draw more power in the low coupling areas while having to suppress less overvoltage in the high coupling areas. This also enables the contactless power supply to detect more signals (e.g., communication signals) in lower coupling areas with less variation to average across the range of devices present.
  • Fig. 1 is a plan view of an inductive coil in accordance with one embodiment.
  • Fig. 2 is a graph illustrating a spiral pattern following a square root curve.
  • FIG. 3 is a schematic diagram illustrating a contactless power supply system in accordance with one embodiment.
  • Fig. 4 is a cross-sectional diagram illustrating the contactless power supply system of
  • Fig. 5 is a prior art coil construction and portable device for performance comparison against the inductive coil of Fig. 1.
  • Fig. 6 is a two-dimensional coupling coefficient color plot for the prior art coil construction of Fig. 5.
  • Fig. 7 is a two-dimensional coupling coefficient color plot for the inductive coil of Fig. 1 lacking a ferrite core element.
  • Fig. 8 is a two-dimensional coupling coefficient color plot for the inductive coil of Fig. 1 including a ferrite core element. DESCRIPTION OF THE CURRENT EMBODIMENTS
  • the current embodiments relate to inductive coils for use in contactless power supply systems and other circuit devices.
  • the inductive coil generally includes a conductive element in a planar spiral pattern, wherein the pitch between adjacent spirals is greater near the center of the spiral pattern than near the outer periphery of the spiral pattern.
  • the inductive coil in accordance with one embodiment is discussed in Part I below.
  • a contactless power supply system including an inductive coil in accordance with this embodiment is set forth in Part II below.
  • An example is set forth in Part III below.
  • the inductive coil 10 includes a conductive element 12 having a first end portion 14 and a second end portion 16 defining a length therebetween.
  • the conductive element 12 is arranged in a two-dimensional or planar spiral pattern including an approximate geometric center 18 and an outer periphery 20.
  • the spiral pattern includes n number of spirals, wherein the outermost spiral is defined as the nth spiral or spiral-n, the next outermost spiral is defined as the n-1 spiral, and so on, until reaching the innermost spiral or spiral-1.
  • a spiral is defined to include that portion of the conductive element 12 traversing three hundred and sixty degrees about the geometric center 18. Any number of spirals can be used in a given embodiment, including for example greater than two hundred spirals. Also by example, the spiral pattern can include between two and two-hundred spirals inclusive, optionally between four and forty spirals inclusive, and further optionally between ten and twenty spirals inclusive.
  • the spiral pattern includes a pitch between adjacent spirals.
  • the pitch is a measurement of the distance separating the centerline of adjacent spirals.
  • the pitch between adjacent spirals is different from the spacing between adjacent spirals, in that the spacing is equal to the pitch minus the conductor diameter or thickness. This distinction can be small or even negligible for conductors having a small diameter or thickness, in which instance the conductor 12 is assumed to be infinitesimally thin.
  • the pitch between adjacent spirals is greater near the center 18 of the spiral pattern than near the outer periphery 20 of the spiral pattern.
  • the pitch progressively decreases over a first portion 22 of the spiral pattern, and remains substantially constant over a second portion 24 of the spiral pattern radially outward of the first portion 20 of the spiral patter.
  • the first portion 24 of the spiral winding includes a progressive decrease in spiral pitch
  • the second portion 24 of the spiral winding includes a substantially constant spiral pitch.
  • the spiral pattern includes a progressive decrease in pitch from the center to the outer periphery, and does not include the second portion 24 having a substantially constant pitch.
  • the spiral pattern can also be described based on the distance to the spiral pattern center 18.
  • the distance to the spiral pattern center 18 can progressively increase in accordance with a square root curve. That is, at each point along an arbitrary radial 26 extending from the center 18 (e.g., the 270° radial), the distance to the spiral pattern center 18 increases in proportion to the square root of n, where n corresponds to the spiral number.
  • Numerical values in accordance with one embodiment are shown below for an eight inch by eight inch square spiral pattern with an inductance of 35.58 ⁇ , and graphically depicted in Fig. 2:
  • the spiral pattern includes a repeating pattern of spirals each defining a distance to the center of the spiral pattern when measured along a common radial, wherein the distance is proportional to the square root of that number spiral.
  • the distance for each spiral is determined by multiplying the square root of n by a proportioning constant c, where c is optionally equal to the distance between spiral-1 and the spiral pattern center 18, or 1.24 inches in the present embodiment. This equation is depicted below:
  • the distance for each spiral can be computed along a common radial, for example the negative-x axis as shown in Fig. 2. Different radials can be used in addition to this radial. For example, a rectangular spiral pattern can include a different distance in the y-direction.
  • the y-distance is equal to the square root of each n turn multiplied by the constant c, where c is optionally equal to the y-distance for spiral-1.
  • an additional spiral 28 is included between spiral-11 and spiral-12, with this additional spiral not following the square root curve of Fig. 2. Instead, the additional spiral 28 is spaced substantially equally between spiral-11 and spiral-12, such that these three spirals form the second portion 24 of substantially constant spiral pitch.
  • the spiral pattern can assume essentially any planar geometry, including for example a square spiral or a rectangular spiral as generally depicted in Fig. 1.
  • the spiral pattern can include a single continuous curve, including for example an oval spiral or a circular spiral. In other embodiments the spiral pattern can assume different geometries as desired.
  • the spiral pattern can include a logarithmic spiral pattern or a fractal spiral pattern, for example a first order fractal or a second order fractal, which can potentially generate a smooth flux field density.
  • the spiral pattern can be formed of essentially any conductive material, including for example Litz wire, copper wire, etched conductors or printed conductors.
  • the inductive coil 10 is suitable for use in contactless power supply system, and in other circuit devices.
  • the inductive coil 10 can be used in conjunction with a contactless power supply system 30 having a contactless power supply 32 and one or more portable devices 34, 36, generally depicted in Figs. 3-4.
  • the contactless power supply 32 can include a primary coil 38 and a primary side resonator coil 40, while the portable devices 34, 36 can optionally include a secondary side resonator coil 42 and a secondary coil 44.
  • any or all of these inductive elements 38, 40, 42, 44 can include the inductive coil 10 of the present invention.
  • the contactless power supply 32 includes a power supply 46, signal generating circuitry 48 (depicted as an inverter), a wireless power transmitter 50, and a control system 52.
  • the power supply 46 of the current embodiment may be a conventional power supply that transforms an AC input (e.g., wall power) into an appropriate DC output that is suitable for driving the wireless power transmitter 50.
  • the power supply 46 may be a source of DC power that is appropriate for supplying power to the wireless power transmitter 50.
  • the power supply 46 generally includes a rectifier 54 and a DC-DC converter 56. The rectifier 54 and DC- DC converter 56 provide the appropriate DC power for the power supply signal.
  • the power supply 46 may alternatively include essentially any circuitry capable of transforming input power to the form used by the signal generating circuitry 48.
  • the control system 52 can be configured to adjust operating parameters.
  • the control system 52 may have the ability to adjust rail voltage or switching circuit phase.
  • the DC-DC converter 56 may have a variable output.
  • the adaptive control system 52 may be coupled to the DC-DC converter 56 (represented by broken line) to allow the adaptive control system 52 to control the output of the DC-DC converter 56.
  • the signal generating circuitry 48 includes switching circuitry that is configured to generate and apply an input signal to the wireless power transmitter 50.
  • the switching circuitry may form an inverter that transforms the DC output from the power supply 46 into an AC output to drive the wireless power transmitter 50.
  • the switching circuitry may vary from application to application.
  • the switching may include a plurality of switches, such as MOSFETs, arranged in a half- bridge topology or in a full-bridge topology.
  • the power transmitter 50 includes a tank circuit 58 having a primary coil 38 and a ballast capacitor 60 that are arranged to form a series resonant tank circuit and a resonator circuit 62 having a resonator coil 40 and a resonator capacitor 64.
  • the term primary circuit may be used to refer to the entire tank circuit 58 or to the primary coil 38.
  • the term primary resonator circuit may be used to refer to the entire resonator circuit 62 or to the resonator coil 40.
  • the present invention is not limited to use with series resonant tank circuits and may instead be used with other types of resonant tank circuits and even with non-resonant tank circuits, such as a simple inductor without matching capacitance.
  • the contactless power supply 32 may include alternative inductors or structures capable of generating a suitable electromagnetic field.
  • the control system 52 includes portions configured, among other things, to operate switching circuitry to produce the desired power supply signal to the wireless power transmitter 50.
  • the adaptive control system 52 may control the switching circuitry based on communications received from the remote device 34, 36.
  • the adaptive control system 52 of this embodiment includes control circuitry that performs various functions, such as controlling the timing of the switching circuit and extracting and interpreting communications signals. These functions may alternatively be handled by separate controllers or other dedicated circuitry.
  • the contactless power supply 32 additionally includes a power transfer surface 82 to receive the portable devices 34, 36 at a plurality of locations along the power transfer surface 82, such that the portable devices 34, 36 have spatial freedom in two dimensions.
  • the primary coil 38 is located transverse to the resonator coil 40.
  • the primary coil 38 and the primary side resonator coil 40 share a coupling coefficient greater than the coupling coefficient shared between the primary coil 38 and either of the secondary coil 44 or the secondary side resonator coil 42.
  • An optional shield 83 is interposed between the primary coil 38 and the resonator coil 40. The shield is generally positioned such that certain coupling is unhindered while other coupling is reduced.
  • the shield 83 is a flux concentrator or flux guide. In other embodiments, a portion of the shield 83 is a flux concentrator.
  • An optional core element 85 is positioned in the center of the spiral pattern, potentially smoothing the coupling coefficient over a greater area.
  • the primary side resonator coil 40 can include any number of spirals, including for example thirteen spirals as depicted in Fig. 1.
  • the portable devices 34, 36 may include a generally conventional electronic device, such as a cell phone, a media player, a handheld radio, a camera, a flashlight or essentially any other portable electronic device.
  • the portable device 34, 36 may include an electrical energy storage device, such as a battery, capacitor or a super capacitor, or it may operate without an electrical energy storage device.
  • the components associated with the principle operation of the portable device 34, 36 are generally conventional and therefore will not be described in detail. Instead, the components associated with the principle operation of the portable device 34, 36 are generally referred to as principle load 66. For example, in the context of a cell phone, no effort is made to describe the electronic components associated with the cell phone itself.
  • the portable device 34, 36 of this embodiment generally includes a wireless receiver
  • the portable device 34, 36 may include a controller.
  • the wireless receiver 68 may include a secondary tank circuit 72 having a secondary coil 44 and secondary tank capacitor 74 and a secondary resonator circuit 76 having a secondary resonator coil 42 and secondary resonator capacitor 78.
  • the term secondary circuit may refer to the secondary tank circuit or the secondary coil. In some embodiments, the wireless receiver 68 may not include a secondary tank capacitor.
  • the term secondary resonator circuit may refer to the entire secondary resonator circuit or the secondary resonator coil.
  • the portable device may not include a secondary resonator circuit 76, including for example the portable device 36 shown in Fig. 3.
  • the present invention is not limited to the topology of the wireless receiver 68 of the illustrated embodiment in Fig. 3.
  • Alternative embodiments, for example, may include both a secondary tank circuit 72 and a secondary resonator circuit 76 coupled to the rectification circuitry 70 of the portable device rather than the secondary resonator circuit 76 being isolated from the secondary tank circuit 72 as shown in the illustrated embodiment of Fig. 3.
  • the rectifier 70 and regulation circuitry 80 convert the AC power generated in the wireless power receiver 68 into power for operation of the load 66.
  • the regulation circuitry 80 may, for example, include a DC-DC converter in those embodiments where conversion to and regulation of DC power is desired. In applications where AC power is desired in the portable device 34, 36, the rectifier 80 may not be necessary. In some embodiments, regulation circuitry may be unnecessary or implemented as part of the load 66.
  • the portable device 34, 36 may include a secondary communications transceiver adapted to modulate and demodulate information via the wireless power link with the contactless power supply 32.
  • a separate communication channel can be set up between the portable device and contactless power supply, the functions of which may be handled by separate controllers or other dedicated circuitry.
  • the contactless power supply 32 and portable device 34, 36 may be configured to communicate using essentially any data encoding scheme.
  • the present invention may be incorporated into the contactless power supply disclosed U.S. Patent 7,212,414, which is entitled “Adaptive Inductive Power Supply” and issued May 1 , 2007, to Baarman; the contactless power supply with communication of U.S. Patent 7,522,878, which is entitled “Adaptive Inductive Power Supply with Communication” and issued April 21 , 2009 to Baarman; the contactless power supply of U.S. Serial No. 13/156,390, which is entitled “Coil Configurations for Inductive Power Transfer” and filed June 9, 2011 , to Baarman; the contactless power supply of U.S.
  • the following example is provided for illustrative purposes and should not be construed as limiting.
  • the following example includes a comparison of the inductive coil 10 of Fig. 1 against the prior art resonator coil 100 of Fig. 5.
  • the inductive coil 10 achieved a higher coupling coefficient nearer the center of the inductive coil 10, while also achieving a desired range of coupling coefficients across different portions of the inductive coil 10, which can be particularly advantageous for the simultaneous charging of multiple portable devices.
  • the prior art resonator coil 100 of Fig. 5 included an eight-turn double-layer winding with a height of 219 mm and a width of 222 mm.
  • the receiver coil 102 used in this example included a single layer secondary coil having 15 turns of 40/40 Litz wire with a height of 31 mm and a width of 24 mm.
  • the coupling coefficient k is depicted in Fig. 6, where the coupling coefficient is a scalar depiction of that portion of the flux originating from the resonator coil 100 and passing through the receiver coil 102.
  • the coupling coefficient k was strongest when the receiver coil 102 was positioned over the corners of the prior art resonator coil 100, achieving a peak coupling coefficient k of 0.085.
  • the coupling coefficient k farthest from the corner was between about 0.005 and about 0.01.
  • the coupling coefficient k was predominantly about 0.005 to about 0.01 in central region of the resonator coil, e.g., the region greater than 2 cm from its outer periphery.
  • the coupling coefficient k was modeled for the inductive coil 10 of Fig. 1 both with and without a ferrite shield.
  • the inductive coil 10 included a single-layer square spiral pattern having an inductance of 35.58 ⁇ , an equivalent series resistance of 0.080 Ohms, and a capacitance of 45.0 nF.
  • the inductive coil 10 included thirteen spirals, where spiral-1 through spiral-12 were spaced from the geometric center by a distance equal to the square root of the spiral number (i.e., 1 , 2, 3, 4 ... 12) multiplied by 1.24 inches.
  • Spiral-11.5 was interposed between spirals 11 and 12 to provide close spaced turns on the outside of the inductive coil 10 to better accommodate energization by a transverse primary coil 38 as generally described above in connection with Fig. 4.
  • the primary coil 38 was driven with a time-varying current having an operating frequency of 126 kHz, generating a time-varying electromagnetic flux. This flux caused the resonator coil 10 to rapidly oscillate, optionally oscillating at resonance.
  • the resonator coil 10 then induced a time-varying current in the receiver coil 102.
  • the current induced in the receiver coil 102 varied based on the location of the receiver coil 102 relative to the geometric center 18 of the resonator coil 10. Referring now to Fig. 7, the coupling coefficient between the resonator coil 10 and the receiver coil 102 varied from about 0.060 near the corners of the resonator coil 10 to about 0.040 near the geometric center of the resonator coil 10.
  • the resonator coil 10 of Fig. 1 demonstrated an improved coupling coefficient k over the resonator coil 100 of Fig. 6 in the central region of the coil.
  • the coupling coefficient between the resonator coil 10 and the receiver coil 102 varied from about 0.065 near the corners of the resonator coil 10 to about 0.035 near the geometric center of the resonator coil 10, shown generally in Fig. 8.
  • the range of coupling coefficients over the intended operating area was from 0.005-0.085 for the prior art resonator coil 100 and 0.015-0.065 for the inductive coil 10 of the present example.
  • This narrowing of the range of available coupling coefficients can be particularly advantageous when the charging pad is coupled to multiple portable devices.
  • the "floor" coupling coefficient should be at least about 0.015 to permit a portable device to discriminate low-power communication signals from noise and other ambient interference.
  • a portable device would not identify the charging pad as such, and would therefore not initiate the communications handshake with the charging pad to begin wireless power transfer.
  • the "ceiling" coupling coefficient should not be undesirably high, in which instance the portable device would step down the over-voltage induced in the secondary coil.
  • a portable device can require the use of a DC-DC converter, e.g., a linear converter or a buck-boost converter, potentially increasing the size of the portable device in instances where a step down is required.
  • the narrowed range of available coupling coefficients can ensure that, at a minimum, each portable device will be able to communicate with the charging pad, independent of the position of the portable device on the charging pad. While this is happening, the remaining portable device can receive power elsewhere on the charging pad, without requiring additional circuitry to step-down an over-voltage induced in the secondary coil. Accordingly, the narrowing of available coupling coefficients enables portable devices to draw more power in low coupling regions while suppressing over-voltage in high coupling regions. The narrowing of available coupling coefficients also enables the charging pad to have less variation to average across the range of portable devices present.

Abstract

L'invention concerne une bobine inductive pour un système d'alimentation électrique sans contact. La bobine inductive comprend un élément conducteur ayant un motif de spirale plane, le pas entre des spirales adjacentes étant plus important près du centre du motif de spirale plane que près de la périphérie externe du motif de spirale plane. La bobine inductive peut être utilisée comme l'une quelconque d'une bobine primaire, d'une bobine de résonateur côté primaire, d'une bobine de résonateur côté secondaire et/ou d'une bobine secondaire afin d'augmenter l'efficacité d'un système d'alimentation électrique sur une plage de distances et d'orientations d'alignement. Dans certains modes de réalisation, les spirales sont espacées du centre de motif de spirale d'une distance qui augmente en proportion de la courbe de racine carrée de sorte que les spirales se regroupent près la périphérie externe du motif de spirale.
PCT/US2013/031128 2013-02-25 2013-03-14 Bobine spirale à pas variable WO2014130065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361768862P 2013-02-25 2013-02-25
US61/768,862 2013-02-25

Publications (1)

Publication Number Publication Date
WO2014130065A1 true WO2014130065A1 (fr) 2014-08-28

Family

ID=47997948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/031128 WO2014130065A1 (fr) 2013-02-25 2013-03-14 Bobine spirale à pas variable

Country Status (3)

Country Link
CN (1) CN104008846A (fr)
TW (1) TW201434063A (fr)
WO (1) WO2014130065A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016081784A1 (fr) * 2014-11-20 2016-05-26 Fractal Antenna Systems, Inc. Procédé et appareil pour condensateurs pliés, rugueux et/ou fractals
WO2017004082A1 (fr) * 2015-06-29 2017-01-05 Wireless Advanced Vehicle Electrification, Inc. Enroulement de tapis de charge à faible inductance au moyen d'un enroulement adapté de multiples spirales
JP2020107776A (ja) * 2018-12-28 2020-07-09 昭和電線ケーブルシステム株式会社 コイルおよびコイルの製造方法
KR20200089134A (ko) * 2019-01-16 2020-07-24 삼성전기주식회사 인덕터 및 인덕터를 포함하는 저잡음 증폭기
WO2021000147A1 (fr) * 2019-06-30 2021-01-07 瑞声声学科技(深圳)有限公司 Élément de rayonnement et antenne
US11437855B2 (en) 2017-12-22 2022-09-06 Wireless Advanced Vehicle Electrification, Llc Wireless power transfer pad with multiple windings and magnetic pathway between windings
US11437854B2 (en) 2018-02-12 2022-09-06 Wireless Advanced Vehicle Electrification, Llc Variable wireless power transfer system
US11462943B2 (en) 2018-01-30 2022-10-04 Wireless Advanced Vehicle Electrification, Llc DC link charging of capacitor in a wireless power transfer pad

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105845404B (zh) * 2015-01-15 2017-12-12 宁波微鹅电子科技有限公司 一种高品质因数的发射线圈结构及其绕制方法
CA3046620A1 (fr) * 2016-09-01 2018-03-08 Sanjaya Maniktala Agencements de bobines receptrices segmentees et longitudinales permettant le transfert d'energie sans fil
CN109643607B (zh) * 2016-09-28 2021-01-12 日本电产株式会社 非接触供电用线圈单元
PT3631819T (pt) * 2017-05-30 2023-10-27 Inductev Inc Conjunto de bobina de perfil fino para transferência de energia sem fio
CN108717170B (zh) * 2018-05-25 2020-09-18 中国医学科学院生物医学工程研究所 用于磁感应式磁声成像磁场激励的变间距蚊香形线圈
CN110888170A (zh) * 2018-09-07 2020-03-17 宏碁股份有限公司 检测装置
CN116130198A (zh) * 2021-11-12 2023-05-16 上海微创惟美医疗科技(集团)有限公司 一种线圈及其绕制方法、线圈绕制设备、手柄及电磁发生装置
TWI832412B (zh) * 2022-09-06 2024-02-11 群田工業有限公司 高頻用繞線磁芯電感

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7212414B2 (en) 1999-06-21 2007-05-01 Access Business Group International, Llc Adaptive inductive power supply
US7522878B2 (en) 1999-06-21 2009-04-21 Access Business Group International Llc Adaptive inductive power supply with communication
WO2009155000A2 (fr) * 2008-05-27 2009-12-23 University Of Florida Research Foundation, Inc. Procédé et appareil pour produire un champ magnétique sensiblement uniforme
US20120187903A1 (en) * 2011-01-26 2012-07-26 Panasonic Corporation Non-contact charging module and reception-side and transmission-side non-contact charging apparatuses using the same
DE102011107620A1 (de) * 2011-06-30 2013-01-17 Paul Vahle Gmbh & Co. Kg Flachspule für kontaktlose induktive Energieübertragung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7212414B2 (en) 1999-06-21 2007-05-01 Access Business Group International, Llc Adaptive inductive power supply
US7522878B2 (en) 1999-06-21 2009-04-21 Access Business Group International Llc Adaptive inductive power supply with communication
WO2009155000A2 (fr) * 2008-05-27 2009-12-23 University Of Florida Research Foundation, Inc. Procédé et appareil pour produire un champ magnétique sensiblement uniforme
US20120187903A1 (en) * 2011-01-26 2012-07-26 Panasonic Corporation Non-contact charging module and reception-side and transmission-side non-contact charging apparatuses using the same
DE102011107620A1 (de) * 2011-06-30 2013-01-17 Paul Vahle Gmbh & Co. Kg Flachspule für kontaktlose induktive Energieübertragung

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016081784A1 (fr) * 2014-11-20 2016-05-26 Fractal Antenna Systems, Inc. Procédé et appareil pour condensateurs pliés, rugueux et/ou fractals
WO2017004082A1 (fr) * 2015-06-29 2017-01-05 Wireless Advanced Vehicle Electrification, Inc. Enroulement de tapis de charge à faible inductance au moyen d'un enroulement adapté de multiples spirales
US10148117B2 (en) 2015-06-29 2018-12-04 Wireless Advanced Vehicle Electrification, Inc. Low inductance pad winding using a matched winding of multiple spirals
US11437855B2 (en) 2017-12-22 2022-09-06 Wireless Advanced Vehicle Electrification, Llc Wireless power transfer pad with multiple windings and magnetic pathway between windings
US11764613B2 (en) 2017-12-22 2023-09-19 Wireless Advanced Vehicle Electrification, Llc Wireless power transfer pad with multiple windings and magnetic pathway between windings
US11462943B2 (en) 2018-01-30 2022-10-04 Wireless Advanced Vehicle Electrification, Llc DC link charging of capacitor in a wireless power transfer pad
US11824374B2 (en) 2018-02-12 2023-11-21 Wireless Advanced Vehicle Electrification, Llc Variable wireless power transfer system
US11437854B2 (en) 2018-02-12 2022-09-06 Wireless Advanced Vehicle Electrification, Llc Variable wireless power transfer system
JP2020107776A (ja) * 2018-12-28 2020-07-09 昭和電線ケーブルシステム株式会社 コイルおよびコイルの製造方法
JP7246185B2 (ja) 2018-12-28 2023-03-27 昭和電線ケーブルシステム株式会社 コイルおよびコイルの製造方法
US10886058B2 (en) 2019-01-16 2021-01-05 Samsung Electro-Mechanics Co., Ltd. Inductor and low-noise amplifier including the same
KR102163060B1 (ko) * 2019-01-16 2020-10-08 삼성전기주식회사 인덕터 및 인덕터를 포함하는 저잡음 증폭기
KR20200089134A (ko) * 2019-01-16 2020-07-24 삼성전기주식회사 인덕터 및 인덕터를 포함하는 저잡음 증폭기
WO2021000147A1 (fr) * 2019-06-30 2021-01-07 瑞声声学科技(深圳)有限公司 Élément de rayonnement et antenne

Also Published As

Publication number Publication date
CN104008846A (zh) 2014-08-27
TW201434063A (zh) 2014-09-01

Similar Documents

Publication Publication Date Title
WO2014130065A1 (fr) Bobine spirale à pas variable
US9287736B2 (en) Wireless power transmitter and method of transmitting power thereof
JP6288519B2 (ja) 無線電力伝送システム
EP2581921B1 (fr) Émetteur sans fil de puissance
JP6230999B2 (ja) 容量性非接触式給電システム
JP6084994B2 (ja) 無線電力受信装置、端末機、及び無線電力送信装置
JP6001355B2 (ja) 非接触給電装置
JP5405694B1 (ja) 送電装置、電子機器およびワイヤレス電力伝送システム
EP3032701B1 (fr) Dispositif de transmission d'énergie sans fil
JP6164287B2 (ja) ワイヤレス給電装置
KR20130132175A (ko) 무선전력 송신장치, 전력 공급 장치 및 그의 전력 제어 방법
KR101382920B1 (ko) 무선전력 송신장치
KR20140076993A (ko) 무선 전력 장치
JP6535003B2 (ja) 無線電力受信装置
TW201246744A (en) Transmission coil for wireless power transmission
KR101700793B1 (ko) 무선 전력 송신 장치 및 그 제어 방법
KR101305790B1 (ko) 무선전력 송신장치, 무선전력 수신장치
KR20130014342A (ko) 고효율 무선 충전기
KR20160124568A (ko) 무선 전력 송신 장치 및 그 제어 방법
US9991749B2 (en) Coil unit, wireless power feeding device, wireless power receiving device, and wireless power transmission device
US9634731B2 (en) Wireless power transmitter
KR101327024B1 (ko) 무선전력 송신장치 및 무선전력 전송 시스템
Xu A wireless power transfer system based on high quality factor inductor
KR101976613B1 (ko) 무선전력 수신장치
KR101393852B1 (ko) 전력 공급 장치, 무선전력 송신장치 및 전력 공급 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13712096

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13712096

Country of ref document: EP

Kind code of ref document: A1