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WO2015052003A1 - Module de réception de puissance électrique capacitive sans fil - Google Patents

Module de réception de puissance électrique capacitive sans fil Download PDF

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Publication number
WO2015052003A1
WO2015052003A1 PCT/EP2014/070427 EP2014070427W WO2015052003A1 WO 2015052003 A1 WO2015052003 A1 WO 2015052003A1 EP 2014070427 W EP2014070427 W EP 2014070427W WO 2015052003 A1 WO2015052003 A1 WO 2015052003A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
power
face
electrodes
power receiving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2014/070427
Other languages
English (en)
Inventor
Adrianus Sempel
Marc Andre De Samber
Theodorus Johannes Petrus Van Den Biggelaar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Publication of WO2015052003A1 publication Critical patent/WO2015052003A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light

Definitions

  • This invention relates to capacitive powering systems for wireless power transfer.
  • the invention relates to a power receiving module for use in such a system.
  • Wireless power transfer systems are known and are gaining increasing attention for powering and charging portable devices including smart phones, cameras, and laptop computers.
  • the predominant solution today uses an inductive interface between a charging station, acting as the transmitter, and a receiver, typically a portable device. Both the transmitter and receiver are fitted with electrical coils. When brought into physical proximity, power flows from the transmitter to the receiver.
  • This invention relates to an alternative approach which has been developed, that uses a capacitive, rather than inductive, interface to deliver power.
  • Figure 1 shows the basic configuration in schematic form.
  • An ac voltage is generated by a transmitter 2.
  • the ground and high voltage terminals are coupled to the two terminals of a load 4 through capacitive plates.
  • the field is confined between conductive plates, alleviating the need for magnetic flux guiding and shielding components that add bulk and cost to inductive solutions.
  • the capacitive coupling mechanism is also referred to as electrostatic induction, and the process involves the passage of electrical energy through a dielectric from one terminal plate to the other.
  • the electric field is created by charging the terminal plates with a high potential, high frequency alternating current power supply.
  • the coupling between the transmitting module and the receiving module essentially requires at least one contact area but preferably two contact areas, between which a dielectric medium is present.
  • FIG. 2 shows a so-called “top-bottom” configuration, in which the power receiving module 8 is sandwiched between top and bottom electrodes 10,12 of the power transmitting module.
  • the receiving module 8 is in the form of a three dimensional body, with two parallel opposing faces, on which receive electrodes 14,16 are provided. No lateral alignment of the module is needed.
  • Figure 3 shows a so-called "lateral" configuration in which the transmission module has a planar surface on which two adjacent parallel electrodes 10,12 are provided.
  • the receiving module 8 has two side by side receiving electrodes 14,16.
  • the electrode arrangement of the power receiving module of Figure 2 could not be used effectively to receive power from the power transmission module of Figure 3.
  • the electrode arrangement of the power receiving module of Figure 3 could not be used effectively to receive power from the power transmission module of Figure 2. This means that for a certain electrode configuration on the transmission module only receiving modules with same or comparable electrodes will fit, and hence will be powered in the configuration.
  • a power receiving module for use in a capacitive powering system, the module for receiving wireless power for transfer to a load of the module, wherein the module comprises:
  • first and second opposite parallel faces of the body each comprise a respective power receiving electrode, such that the first and second opposite parallel faces can be used to receive power when the power receiving module is sandwiched between top and bottom power transmitting electrodes of a power transmitting module, and wherein at least one face of the body comprises a pair of power receiving electrodes, such that the at least one face can can be used to receive power when the at least one face is provided against a face of a power transmitting module which has adjacent power transmitting electrodes.
  • the power receiving module is able to receive power by wireless power transmission from different configurations of power transmission module, having different electrode
  • the module of the invention can be used to power an associated electronic device in the home or office or a public place equipped with a power transmission module having either of a lateral or a top-down electrode configuration.
  • a power transmission module having either of a lateral or a top-down electrode configuration.
  • the module can be incorporated into electrically powered devices at the point of manufacture or can be provided in a retro-fit form and possibly as a form of universal power adapter for electrically powered devices.
  • the power receiving electrode of the first face can be electrically connected to a first power receiving electrode on a third face
  • the power receiving electrode of the second face can be electrically connected to a second power receiving electrode on the third face.
  • the third face has two electrodes (for lateral powering), but there can be only two electrodes in total.
  • This implementation requires the module to be positioned in dependence on the power transmission module being used.
  • the first and second power receiving electrodes of the third face are preferably separated by an gap, and this can be offset from a centerline of the third face. This offset can be used as part of an unbalanced Wheatstone Bridge configuration.
  • the power receiving electrode of the first face can be electrically connected to a first power receiving electrode on a fourth face
  • the power receiving electrode of the second face can be electrically connected to a second power receiving electrode on the fourth face, with the third and fourth faces opposite each other.
  • This arrangement can again have only two electrodes in total, with two opposite faces carrying only one of the two electrodes, and another two opposite faces each carrying both electrodes.
  • the first and second power receiving electrodes of the fourth face can again be separated by an gap offset from a centerline of the fourth face.
  • each face which is provided with electrodes i.e. they do not all need to have electrodes
  • each electrode face comprises at least two electrodes. This means that each electrode face can be coupled to a lateral or top-bottom electrode. When used with a top-bottom architecture, the multiple electrodes need to have the same polarity, whereas when used with a lateral architecture, the multiple electrodes need to have opposite polarity.
  • Internal circuitry can enable the electrodes to be reconfigurable in this way.
  • each face of the body can be provided with at least two electrodes. This means the module can be positioned in a variety of orientations with respect to the power transmission module.
  • the circuit can comprise, for each power receiving electrode:
  • a second single direction current transfer device in a reverse current direction from the electrode to a second common node.
  • each electrode will self-configure as a high side electrode or a low side electrode in dependence on the power received by the electrode.
  • the circuit ensures suitable connection to the load, and thus provides a form of self-configuration.
  • Each single direction current transfer device can comprise a diode.
  • the first common node can comprise a high terminal for connection to a load and the second common node can comprise a low terminal for connection to the load.
  • the load is the device to be powered by the wireless power transfer.
  • each single direction current transfer device comprises a light emitting diode.
  • the light emitting diodes then together function as the load of the power receiving module.
  • the invention also provides an electrically powered device incorporating the power receiving module of the invention, and also a system comprising one or more electrically powered devices of the invention and a wireless power transmission module, the wireless power transmission module comprising opposing power transmission electrodes between which the module can be positioned for receiving power from the power
  • Fig. 1 shows a schematic drawing of a known wireless power transmission arrangement which uses the principle of capacitive coupling
  • Fig. 2 shows a schematic drawing of a power transmission module having a "top-bottom” electrode configuration as known from the prior art
  • Fig. 3 shows a schematic drawing of a power transmission module having a "lateral" electrode configuration as known from the prior art
  • Fig. 4 shows a schematic diagram of a first embodiment of a power transmission module in accordance with the invention
  • Fig. 5 shows a schematic of a second embodiment of a power transmission module in accordance with the invention.
  • Fig. 6 shows an internal circuit arrangement suitable for use in a power transmission module in accordance with the invention.
  • the invention provides a power receiving module for use in a capacitive powering system for receiving wireless power transfer to a load of the module.
  • the module comprises first and second opposite parallel faces each having a respective power receiving electrode, and at least one face which comprises a pair of power receiving electrodes.
  • electrodes are present which can be used for receiving power from a top-bottom wireless power transmission module, and electrodes are also present which can be used for receiving power from a lateral wireless power transmission module.
  • FIGS 1 to 3 represent the prior art and are already described above.
  • Figure 4 shows a schematic of a first embodiment of a power transmission module in accordance with the invention.
  • the power receiving module 5 is for use in a capacitive powering system for receiving wireless power transfer to a load of the module.
  • the module comprises a three dimensional body with a plurality of faces, with the load and drive circuitry for the load contained within the body.
  • the body is shown as a cube, but it may be a cuboid or indeed other shapes. At the limit, it requires only two opposing planar faces, as will become apparent from the discussion below.
  • the module has a plurality of power receiving electrodes. In the example of Figure 4, there are only two power receiving electrodes 14,16 on opposite parallel faces. The spacing of these faces is designed to be compatible with the spacing between transmission electrodes of a top-bottom power transmission module.
  • the body may be a small unit, for example credit card sized, or it may be much larger.
  • the power receiving electrode 14 of the first face overlaps two opposite faces 17,18.
  • the power receiving electrode 14 is electrically connected to a first power receiving electrode 19 on the third face 17 and also a first power receiving electrode 20 on the fourth face 18.
  • the power receiving electrode 16 of the second face overlaps the third and fourth faces 17,18 and is thereby electrically connected to a second power receiving electrode 21 on the third face 17 and a second power receiving electrode 22 on the fourth face 18.
  • the module 8 there is a circuit for receiving power from the power receiving electrodes and delivering energy to a load within the module,
  • first and second opposite parallel faces of the body which each comprise a respective power receiving electrode (i.e. 14 and 16), and at least one face (i.e. 17 or 18) with a pair of power receiving electrodes. These may be the same faces, so that at the limit only two faces need to be provided with electrodes.
  • the first and second power receiving electrodes 19,21 and 20,22 are separated by a gap 23,24.
  • the gap can be offset from a centerline of the third face.
  • the contacts By making the contacts asymmetrical in this way, they can be used to form an unbalanced capacitive Wheatstone Bridge when connected in a top-bottom construction. As each side has one larger capacitance and one smaller capacitance, power is delivered as the bridge is out of balance. The resulting transfer capacitance is the difference value of the larger and the smaller capacitance. In the simple construction shown, this is obtained by having the slit off-center.
  • the length of the electrode areas can be chosen according to the power / frequency used by the AC power supply.
  • each face which is provided with electrodes comprises at least two electrodes 30-37. This means that any face with electrodes can be used either with a lateral transmission module (in which case the two electrodes function with opposite polarity) or with a top-bottom transmission module (in which case the two electrodes function with the same polarity). It is explained below how the electrodes do not need to have fixed polarity.
  • At least two opposing faces need electrodes.
  • each face of the body is provided with at least two electrodes. This means that, for a cube, it can be positioned over lateral electrodes of the power transmission module, or between the electrodes of the power transmission module, in any orientation.
  • FIG. 6 shows an internal circuit arrangement.
  • Each power receiving electrode 30-37 connects through a forward direction diode 40a to the high terminal of the load and through a reverse direction diode 40b to the low terminal of the load.
  • each electrode can be floating (i.e. not capacitively coupled), coupled to the high voltage terminal of the
  • the transmission module or coupled to the low voltage terminal of the transmission module.
  • the electrodes in this way are self-configuring.
  • the diodes can be other single direction current transfer devices, such as diode-connected transistors. Indeed, other rectifier circuits can also be used.
  • the most simple design can be one with one electrode on one face and two electrodes on an opposite face.
  • the two electrodes on the same face are for use with a lateral transmission module and the opposite faces are for use with a top-bottom transmission module.
  • the load 42 can be a battery to be charged.
  • the load may instead comprise the diodes.
  • the load is replaced with a short circuit.
  • This short circuit means that all diodes connect to a common point.
  • the diodes then comprise light emitting diodes, and the light emitting diodes together function as the load of the power receiving module.
  • the electrodes need not each be of the same shape or size. Positioning of electrodes on the module may be in a symmetrical or uniform repeating pattern but need not be.
  • Suitable electrode materials are known and may include (without limitation); carbon, aluminum, indium tin oxide (ITO), organic material, such as PEDOT, copper, silver, conducting paint. Some of these electrode materials are transparent and therefore of particular interest for lighting use, and others are light blocking and thus more suitable for e.g. a battery charging devices or any other electrical device requiring a wireless powering method.
  • the electrode areas can be chosen in dependence on the type of device. For a battery charging application, large electrodes are desired, both to provide large capacitance and also to give freedom in positioning. For lighting applications, where the body 8 functions as a light source, it may be desired to reduce the area of the electrodes to allow the passage of light (particularly if opaque electrodes are used).
  • the number of faces on which electrodes are provided can also be selected in dependence on the intended use of the device. It might be two, or it might involve using all faces of the receiving module.
  • LEDs When used as an LED device, different LEDs can be of different color. This means that different orientations of the module can correspond to different color output. In this way, the placement position of a cube will determine the (pre-set) light color. Different electrodes can also be associated with different numbers of LEDs to implement different brightness levels, for example.
  • the alignment can become less critical.
  • the power transmission module applies an ac signal between the power transmission terminals, as shown schematically in Figure 1.
  • the power receiving module typically comprises a rectifier, to deliver a dc current to the device to be powered.
  • the circuit of Figure 6 functions as the rectifier.
  • the dc current can be a battery charging current for portable device recharging.
  • the current is for example a dc LED drive current.
  • Inductors are typically used in series with the capacitors formed between the electrodes to reduce the impedance between the transmitter and receiver.
  • the whole system can be operated in electrical resonance for high power transfer.
  • some electrodes can be made available for wireless data transfer or control applications using known data transfer and control methods
  • insulators can be used to separate the electrodes of the transmission module and the receiving module of the invention.
  • the insulator is usefully incorporated into the receiving module of the invention.
  • a dielectric material is for example provided as a layer over exposed surfaces of the electrodes of a receiving module in accordance with the invention.
  • the thickness of such an insulating layer is typically between 1 and 10 microns (e.g., a deposited, evaporated, sprayed or painted layer) and a few millimeters (e.g., a glass envelope at the outer edge of the receiving module layer).
  • the insulator can be incorporated into the power transmission module.
  • a manual or automatic short circuit can be incorporated into the module and selectively used to remove unused electrodes from the circuit when the power receiving module and power transmission module are engaged.
  • modules of the invention have practical use in the charging of batteries for portable electronic devices such as communications devices. It is envisaged that a power transmission module could be embodied in a large planar surface such as a table, counter or desk top with supplied power, or a portable plug in pad. The portable electronic devices can receive power simply by placing on the table, counter, desk top or pad.
  • the load may be an illumination device such as a LED, a LED string or a lamp of other form.
  • the power transmission module could be embodied in a large planar surface such as a wall, ceiling or floor and one or more loads positioned at the preferred site on the wall, ceiling or floor for illuminating.
  • the module can consist of a substrate on which LEDs and electrodes are mounted.
  • the module is fabricated so small that the LEDs and electrodes are incorporated within one die, thus avoiding the need for an additional substrate carrier.
  • the electrodes can be placed at the bottom of a lamp-foot and actually can have an area of many cm 2 .
  • the spacing between the individual pixels is a few cm, thus allowing modules of similar size.
  • the size might even be larger.
  • Another alternative is to fabricate a large cube-like light device, that is used for general illumination or atmospheric lighting purposes.
  • WO 2013/024419 discloses the use of capacitive wireless powering for a lamp, and shows a lateral wireless power transfer approach.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un module de réception de puissance électrique utilisé dans un système de puissance électrique capacitive pour recevoir un transfert de puissance électrique sans fil sur une charge du module. Le module comprend une première et une seconde face parallèles opposées dotées chacune d'une électrode de réception de puissance électrique respective, et au moins une face qui comprend une paire d'électrodes de réception de puissance électrique. De cette façon, on utilise les électrodes pour recevoir une puissance électrique provenant d'un module vertical de transmission de puissance électrique sans fil, et des électrodes pour recevoir une puissance électrique provenant d'un module latéral de transmission de puissance électrique sans fil. La diversité d'utilisation du module est obtenue par le positionnement de faces spécifiques du module vers le module de transmission.
PCT/EP2014/070427 2013-10-10 2014-09-25 Module de réception de puissance électrique capacitive sans fil Ceased WO2015052003A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13188127.8 2013-10-10
EP13188127 2013-10-10

Publications (1)

Publication Number Publication Date
WO2015052003A1 true WO2015052003A1 (fr) 2015-04-16

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Family Applications (1)

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PCT/EP2014/070427 Ceased WO2015052003A1 (fr) 2013-10-10 2014-09-25 Module de réception de puissance électrique capacitive sans fil

Country Status (1)

Country Link
WO (1) WO2015052003A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150256022A1 (en) * 2014-03-06 2015-09-10 Samsung Electro-Mechanics Co., Ltd. Non-contact type power charging apparatus and non-contact type battery apparatus

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090302690A1 (en) * 2008-06-09 2009-12-10 Fumio Kubono Transmission System, Power Supplying Apparatus, Power Receiving Apparatus, and Transmission Method
US20100087143A1 (en) * 2008-10-03 2010-04-08 Seagate Technology Llc Wireless power and data transfer via capacitive coupling
EP2400633A2 (fr) * 2010-06-24 2011-12-28 Murata Manufacturing Co. Ltd. Appareil de transmission de puissance, appareil de réception de puissance et système de transmission de puissance sans fil
US20120038218A1 (en) * 2010-08-10 2012-02-16 Murata Manufacturing Co., Ltd. Power transmission system
WO2012120404A1 (fr) * 2011-03-07 2012-09-13 Koninklijke Philips Electronics N.V. Dispositif électroluminescent
WO2013024395A2 (fr) * 2011-08-16 2013-02-21 Koninklijke Philips Electronics N.V. Électrodes de récepteur d'un système d'alimentation électrique capacitif sans fil
GB2499914A (en) * 2010-12-24 2013-09-04 Murata Manufacturing Co Wireless electrical power transmission system, electrical power transmission device, and electrical power receiving device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090302690A1 (en) * 2008-06-09 2009-12-10 Fumio Kubono Transmission System, Power Supplying Apparatus, Power Receiving Apparatus, and Transmission Method
US20100087143A1 (en) * 2008-10-03 2010-04-08 Seagate Technology Llc Wireless power and data transfer via capacitive coupling
EP2400633A2 (fr) * 2010-06-24 2011-12-28 Murata Manufacturing Co. Ltd. Appareil de transmission de puissance, appareil de réception de puissance et système de transmission de puissance sans fil
US20120038218A1 (en) * 2010-08-10 2012-02-16 Murata Manufacturing Co., Ltd. Power transmission system
GB2499914A (en) * 2010-12-24 2013-09-04 Murata Manufacturing Co Wireless electrical power transmission system, electrical power transmission device, and electrical power receiving device
WO2012120404A1 (fr) * 2011-03-07 2012-09-13 Koninklijke Philips Electronics N.V. Dispositif électroluminescent
WO2013024395A2 (fr) * 2011-08-16 2013-02-21 Koninklijke Philips Electronics N.V. Électrodes de récepteur d'un système d'alimentation électrique capacitif sans fil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150256022A1 (en) * 2014-03-06 2015-09-10 Samsung Electro-Mechanics Co., Ltd. Non-contact type power charging apparatus and non-contact type battery apparatus
US9673658B2 (en) * 2014-03-06 2017-06-06 Samsung Electro-Mechanics Co., Ltd. Non-contact capacitive coupling type power charging apparatus and non-contact capacitive coupling type battery apparatus

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