WO2015005012A1 - 受給電装置及び携帯機器 - Google Patents
受給電装置及び携帯機器 Download PDFInfo
- Publication number
- WO2015005012A1 WO2015005012A1 PCT/JP2014/064157 JP2014064157W WO2015005012A1 WO 2015005012 A1 WO2015005012 A1 WO 2015005012A1 JP 2014064157 W JP2014064157 W JP 2014064157W WO 2015005012 A1 WO2015005012 A1 WO 2015005012A1
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- WIPO (PCT)
- Prior art keywords
- power
- coil
- power receiving
- power supply
- resonance coil
- Prior art date
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Images
Classifications
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- H02J7/025—
-
- 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
-
- 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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
-
- 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
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
-
- 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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/20—The network being internal to a load
- H02J2310/22—The load being a portable electronic device
-
- 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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
Definitions
- the present invention relates to a power supply / reception device and a portable device that receive and supply power in a non-contact manner by a magnetic field resonance method.
- Patent Document 1 discloses an electric vehicle in which a power receiving device is disposed above a floor surface of a vehicle body, and a rectifier and a power storage device are disposed in a space separated from the power receiving device.
- Patent Document 2 discloses a configuration in which a wireless power transmission technique of a resonance phenomenon is applied to a portable computer.
- each device such as a rectifier and a power storage device in consideration of the effects of heat generation and magnetism during power feeding.
- the electric vehicle of Patent Document 1 described above in a relatively large device, it is easy to secure the placement location of each device, but it is required to secure the placement location for the purpose of effective use in a limited device. Probability is high.
- in portable devices such as portable computers that are required to be miniaturized, there are limited places where the influence of heat generation and magnetism during power feeding can be avoided, so that further miniaturization is realized. Therefore, how to arrange each device is a very important matter.
- an object of the present invention is to provide a power supply / reception device and a portable device that can easily secure an arrangement place of each device such as a rectifier and a power storage device.
- the power supply / reception device includes a coil module that receives and supplies power to and from another coil module by a resonance phenomenon, and a magnetic field space formed by the resonance phenomenon so as to have a magnetic field strength smaller than that of another part.
- the coil module includes a resonance coil that resonates with the other coil module, and a portion of the resonance coil that overlaps the coil radial direction of the resonance coil. And a power supply / reception coil that receives and supplies power.
- a magnetic field space (space portion) with a small magnetic field appears at the inner position of the coil module or in the vicinity of the coil module at the time of power supply / reception, and this magnetic field space is effectively used as an electronic component placement location.
- a power supply / reception device that makes it possible to easily secure the location of electronic components in various devices, such as portable devices, where it is difficult to secure the location of electronic components. Can be applied.
- the resonance coil and the power supply / reception coil are partially overlapped in the coil radial direction, so that the coil module can be shortened with respect to the coil axial direction.
- size reduction with respect to the coil axial direction of a power supply / reception apparatus is realizable.
- a desired coefficient can be selected from a plurality of control items such as a coupling coefficient at the time of resonance between the coil module and the resonance coil, a power reception voltage, and a current of the coil module. It is possible to set the control item to a target value. That is, it is possible to easily set a desired control item as a target value from among a plurality of control items by changing the degree of overlapping of the coils.
- the resonance coil and the power supply / reception coil may be solenoid coils.
- the shortening of the power supply / reception device can be realized significantly.
- it is easy to change the coil length in the coil axis direction it is possible to easily set a desired control item as a target value from among a plurality of control items.
- the portable device of the present invention includes the power supply / reception device having the above-described configuration.
- the portable device can be provided with a small power supply / reception device, thereby making it possible to easily realize the reduction in size and weight required for the portable device.
- the portable device of the present invention may have an outer wall member exposed to the outside, and at least a part of the coil module in the power supply / reception device may be arranged along the surface shape of the outer wall member.
- the limited internal space in the portable device can be effectively used by arranging the coil module along the outer wall member.
- each device such as a rectifier and a power storage device.
- the power supply / reception device will be described below. In the following description, the case where the power supply / reception device is applied to the power reception device will be described. However, the power supply device may be applied to the power supply device or to both the power reception device and the power supply device.
- the power receiving device As shown in FIG. 1, the power receiving device 1 that is the power receiving and feeding device according to the present embodiment is a magnetic field having a magnetic field strength smaller than that of other parts at the inner position or in the vicinity of the power receiving module 11 during power feeding using the resonance phenomenon. A space is made to appear and this magnetic field space is used as an arrangement place of the electronic component 13.
- the power receiving device 1 (power receiving and feeding device) includes a power receiving module 11 (coil module) that receives and feeds power by a resonance phenomenon with the power feeding module 21 (other coil module), and a magnetic field strength smaller than other portions. And an electronic component 13 arranged in a magnetic field space formed by a resonance phenomenon.
- the power receiving device 1 is reduced in size as a result of preventing malfunction and heat generation above a predetermined temperature by suppressing generation of eddy currents caused by the magnetic field in the electronic component 13 arranged in the magnetic field space. It is possible. Details of the “magnetic field space with small magnetic field strength” will be described later.
- the power receiving module 11 in the power receiving device 1 is partially arranged in the coil radial direction of the power receiving resonance coil 111 (resonance coil) that resonates with the power feeding module 21 and the power receiving resonance coil 111.
- Power receiving coil 112 power receiving and feeding coil for receiving and feeding power.
- the power receiving module 11 includes a power receiving resonance coil 111 disposed on the outer peripheral side, and a power receiving coil 112 disposed on the inner peripheral side of the power receiving resonance coil 111 and partially overlapped in the coil radial direction. have. Thereby, since the power receiving apparatus 1 can shorten a coil module with respect to a coil axial direction, size reduction with respect to a coil axial direction is implement
- the power receiving device 1 adjusts the degree of overlap between the power receiving resonance coil 111 and the power receiving coil 112, so that the coupling coefficient at the time of resonance between the power feeding module 21 (power feeding resonance coil 211) and the power receiving resonance coil 111, It is possible to set a desired control item to a target value from among a plurality of control items such as voltage and current of the power receiving module 11, and perform expansion / contraction of the magnetic field space and change of the formation position. It is possible. That is, the power receiving device 1 sets a desired control item as a target value from among a plurality of control items while ensuring a desired magnetic field space by changing the degree of overlap between the power receiving resonance coil 111 and the power receiving coil 112. Can be easily done.
- the power receiving device 1 may be configured to set control items, expand / contract magnetic field space, etc. depending on whether the power receiving resonance coil 111 and the power receiving coil 112 are arranged on the inner peripheral side or the outer peripheral side. .
- the power receiving device 1 has a magnetic member 17 disposed in the power receiving module 11 so as to increase or decrease the magnetic field coupling at the time of resonance.
- the power receiving device 1 increases or decreases the magnetic field coupling between the power receiving module 11 and the power feeding module 21 when the magnetic member 17 resonates, so that the structural specifications of the sizes and shapes of the power receiving device 1 and the power feeding device 2 are satisfied.
- the specification of transmission efficiency at the time of power supply required for the power receiving device 1 can be easily satisfied, and thus short. Charging in time can be made possible, and overheating due to rapid charging can be prevented.
- the power receiving device 1 may not have the magnetic member 17.
- the power supply module 21 resonates with the power reception resonance coil 111 so as to supply power to the power reception module 11 by a resonance phenomenon, and power supply supplies power to the power supply resonance coil 211. And a coil 212.
- the power reception resonance coil 111 and the power reception coil 112 in the power reception module 11 and the power reception resonance coil 111 and the power reception coil 112 in the power supply module 21 are formed by solenoid coils made of a copper wire material with an insulating coating. Since the solenoid coil tends to be long in the coil axis direction, the power receiving device 1 and the power receiving and feeding device 2 can be significantly shortened.
- a desired control item can be set as a target value from among a plurality of control items in the power receiving device 1 and the power receiving and feeding device 2. It also makes it easy.
- the power receiving device 1 can be mounted on all types of devices that operate by supplying power.
- the power receiving device 1 can be provided in a mobile device, a stationary device, or a vehicle device such as an automobile.
- the portable device includes any device such as a handheld device and a wearable device (human body wearing device).
- portable devices include portable computers (laptops, notebook computers, tablet PCs, etc.), cameras, audio / AV devices (portable music players, IC recorders, portable DVD players, etc.), computers (pocket computers, Calculators), game consoles, computer peripherals (mobile printers, mobile scanners, mobile modems, etc.), dedicated information devices (electronic dictionaries, electronic notebooks, electronic books, portable data terminals, etc.), mobile communication terminals, voice communication terminals (mobile phones) , PHS, satellite phone, third party radio, amateur radio, specified low power radio / personal radio / civil radio, etc.), data communication terminals (cell phones / PHS (feature phones / smartphones), pagers, etc.), broadcast receivers (TV / Radio), mobile radio, mobile TV, Nsegu, other equipment (wristwatch, pocket watch) can hearing aids, handheld GPS, security buzzer, flashlight pen light, battery pack, extracorporeal device of cochlear implant system (sound processor, audio processor) is exemplified and the
- the portable device is arranged along the surface shape of an outer wall member such as a casing in which at least a part of the power receiving module 11 (coil module) is exposed to the outside.
- the power reception module 11 is arranged along the outer wall member, so that the limited internal space in the portable device can be used effectively.
- the magnetic member 17 is made of a magnetic material.
- Magnetic materials include soft Fe, Fe-Si, Fe-Al-Si (Sendust), Fe-Ni (Permalloy), soft ferrite, Fe-based amorphous, Co-based amorphous, Fe-Co (permendur), etc. Examples include magnetic materials.
- the magnetic member 17 may be formed of a resin in which the magnetic powder of the magnetic material is dispersed.
- the resin may be a thermosetting resin or a thermoplastic resin.
- thermosetting resin an epoxy resin, a phenol resin, a melamine resin, a vinyl ester resin, a cyano ester resin, a maleimide resin, a silicon resin, etc.
- thermoplastic resins include acrylic resins, vinyl acetate resins, polyvinyl alcohol resins, and the like.
- the magnetic member 17 is disposed at least on the inner peripheral side of the power receiving resonance coil 111.
- the magnetic member 17 disposed on the inner peripheral side of the power receiving resonance coil 111 acts to increase (increase) the magnetic field coupling between the power receiving resonance coil 111 and the power supply module 21 (power supply resonance coil 211) at the time of resonance. .
- the magnetic member 17 is disposed as follows in order to increase magnetic field coupling. It is preferable that
- the magnetic member 17 is formed in a cylindrical shape along the inner peripheral surface of the power receiving resonance coil 111, and one end position on the power supply module 21 side of the power receiving resonance coil 111 is set to one end position of the power receiving module 11 in the coil axial direction. Preferably they are matched. In this case, the magnetic coupling between the power receiving resonance coil 111 and the power supply module 21 during resonance can be enhanced by the cylindrical magnetic member 17 disposed along the inner peripheral surface of the power receiving resonance coil 111, and The magnetic field space can be expanded to the inner position of the power receiving resonance coil 111.
- the power receiving resonance coil 111 has the same coil diameter as that of the power supply module 21, is disposed to face the power supply module 21, and the power receiving coil 112 coincides with the coil axis of the power receiving resonance coil 111.
- the magnetic member 17 is preferably arranged as described below.
- the magnetic member 17 is formed in a cylindrical shape along the inner peripheral surfaces of the power receiving resonance coil 111 and the power receiving coil 112, and one end position of the power receiving resonance coil 111 on the power supply module 21 side is one end position of the power receiving resonance coil 111. Is provided at the other end of the cylindrical portion and the cylindrical portion whose other end position on the opposite side to the power supply module 21 side is aligned with the other end position of the power receiving coil 112 in the coil axial direction. It is preferable to have a disk portion formed so as to face the other end surface of the coil 112.
- the power receiving resonance coil 111 and the power supply at the time of resonance are fed by the magnetic member 17 including the cylindrical portion disposed along the inner peripheral surface of the power receiving resonance coil 111 and the disk portion disposed opposite to the power receiving coil 112.
- the magnetic field coupling with the module 21 can be further enhanced, and the magnetic field space can be expanded to the inner position of the power reception resonance coil.
- the magnetic member 17 is formed in the cylindrical shape, it is not limited to this, A dotted
- the magnetic member 17 is arranged so as to increase the magnetic coupling at the time of resonance.
- the magnetic member 17 is arranged so as to reduce the magnetic coupling at the time of resonance by the arrangement of the magnetic member 17. Also good.
- the magnetic member 17 is formed in a cylindrical shape along the outer peripheral surfaces of the power receiving resonance coil 111 and the power receiving coil 112, and one end position of the power receiving resonance coil 111 on the power feeding module 21 side is the power receiving resonance coil 111.
- the power receiving device 1 may be configured such that the degree of magnetic field coupling (coupling coefficient) can be changed to an arbitrary value by adjusting the magnetic member conditions such as the arrangement, shape, and size of the magnetic member 17.
- the power receiving apparatus 1 easily changes the degree of magnetic field coupling to an arbitrary value by adjusting the magnetic member condition of the magnetic member 17 while maintaining the distance between the power supply module 21 and the power receiving module 11 constant. be able to.
- the sizes and shapes of the power feeding device 2 and the power receiving device 1 there are restrictions on the sizes and shapes of the power feeding device 2 and the power receiving device 1, and the structural specifications of these sizes and shapes cannot be changed.
- the power receiving device 1 includes one or more electronic components 13 having an electronic circuit, and a battery 14 that supplies operating power. Furthermore, the power receiving apparatus 1 includes an output unit 15 such as a speaker, a light emitting component, and a display, and an input unit 16 such as a microphone and a switch. Specifically, the power receiving device 1 includes electronic components 13 such as an AC / DC conversion unit 131, a charging unit 132, and a control unit 133. At least a part of these electronic components 13 is arranged in a magnetic field space formed by a resonance phenomenon so as to have a magnetic field strength smaller than that of other parts.
- the AC / DC conversion unit 131 has a function of converting AC power supplied to the power receiving module 11 into DC power.
- the charging unit 132 has a function of charging the battery 14.
- the control unit 133 is connected to the output unit 15 and the input unit 16, and has a function of outputting a control signal to the output unit 15, a function of receiving an input signal from the input unit 16, and use of the power receiving device 1. It has a function to process various information and data according to the purpose.
- the battery 14, the output unit 15, and the input unit 16 are described separately from the electronic component 13, but the electronic component 13 includes the battery 14, the output unit 15, and the input unit 16. May be included. That is, the battery 14, the output unit 15, and the input unit 16 may be arranged in the magnetic field space.
- the battery 14 charged by the charging unit 132 is a rechargeable secondary battery.
- Examples of the battery 14 include a lead storage battery, a lithium ion secondary battery, a lithium ion polymer secondary battery, a nickel / hydrogen storage battery, a nickel / cadmium storage battery, a nickel / iron storage battery, a nickel / zinc storage battery, and a silver oxide / zinc storage battery. be able to.
- the battery 14 may be a capacitor instead of a secondary battery.
- the power receiving device 1 configured as described above constitutes a power feeding system 3 with the power feeding device 2.
- the power feeding device 2 includes a power feeding module 21 that supplies power to the power receiving module 11 of the power receiving device 1 by a resonance phenomenon.
- the power supply module 21 includes a power supply resonance coil 211 and a power supply coil 212.
- the power supply apparatus 2 includes a power supply unit 22 that supplies AC power to the power supply module 21 and a control unit 23 that controls the power supply unit 22.
- Magnetic field space which is mainly the place where the electronic component 13 is arranged in the power receiving device 1 will be described in detail.
- the power receiving device 1 is configured to form a “magnetic field space” at a desired position. Formation of the magnetic field space at a desired position can be realized by setting power supply conditions such as a positional relationship with the power supply device 2, a power supply state, and an internal configuration. Furthermore, the formation of the magnetic field space at a desired position can be realized by setting a magnetic member condition that can increase or decrease the coupling coefficient between the power supply resonance coil 211 of the power supply module 21 and the power reception resonance coil 111 of the power reception module 11. .
- the power receiving device 1 supplies power from the power supply resonance coil 211 in the power supply module 21 of the power supply device 2 to the power reception resonance coil 111 in the power reception module 11 due to a resonance phenomenon
- the power reception resonance coil 211 and the power reception module in the power supply module 21. 11 may be configured to form a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the desired position at a desired position between the power receiving resonance coil 111 and the power receiving resonance coil 11.
- a magnetic field space can appear at a position near the power feeding device 2 side of the power receiving module 11.
- the method of forming the “magnetic field space” will be described in detail.
- power is supplied from the power supply resonance coil 211 in the power supply module 21 of the power supply device 2 to the power reception resonance coil 111 in the power reception module 11 of the power reception device 1 by a resonance phenomenon.
- the power supplied to the power supply resonance coil 211 in the power supply module 21 so that the direction of the current flowing in the power supply resonance coil 211 in the power supply module 21 and the direction of the current flowing in the power reception resonance coil 111 in the power reception module 11 are opposite to each other.
- the method of setting the frequency of is illustrated.
- the power supply resonance coil 211 and the power reception resonance coil 211 in the power reception module 11 and the power reception resonance coil 111 in the power reception module 11 are disposed close to each other.
- the coupling coefficient representing the strength of coupling with the resonance coil 111 is increased.
- transmission characteristics a value serving as an index of power transmission efficiency when power is transmitted from the power supply coil 212 to the power reception coil 112, or power is transmitted from the power supply module 21 to the power reception module 11 as power.
- the peak of the measurement waveform is separated into a low frequency side and a high frequency side.
- the frequency of the power supplied to the power supply resonance coil 211 is set to the frequency near the peak on the high frequency side, the direction of the current flowing through the power supply resonance coil 211 and the direction of the current flowing through the power reception resonance coil 111 are reversed.
- the magnetic field generated on the inner peripheral side of the power supply resonance coil 211 and the magnetic field generated on the inner peripheral side of the power reception resonance coil 111 cancel each other, so that the power supply resonance coil 211 and the power reception resonance coil 111 have an inner peripheral side.
- the influence of the magnetic field is reduced, and a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the inner peripheral side of the power supply resonance coil 211 and the power reception resonance coil 111 can be formed.
- the direction of the current flowing in the power supply resonance coil 211 and the power reception resonance coil 111 are changed.
- the method of setting the frequency of the electric power supplied to the electric power feeding resonance coil 211 so that the direction of the electric current which flows may become the same direction is illustrated.
- the power supply resonance coil 211 and the power reception resonance coil 111 are disposed in proximity to each other, thereby coupling the power supply resonance coil 211 and the power reception resonance coil 111.
- the coupling coefficient representing strength increases.
- the transmission characteristic is measured in such a state where the coupling coefficient is high, the peak of the measurement waveform is separated into the low frequency side and the high frequency side. Then, by setting the frequency of the power supplied to the power supply resonance coil 211 to the frequency near the peak on the low frequency side, the direction of the current flowing through the power supply resonance coil 211 and the direction of the current flowing through the power reception resonance coil 111 are changed.
- the magnetic field generated on the outer peripheral side of the power supply resonance coil 211 and the magnetic field generated on the outer periphery side of the power reception resonance coil 111 cancel each other in the same direction, so that a magnetic field is generated on the outer periphery side of the power supply resonance coil 211 and the power reception resonance coil 111.
- a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the outer peripheral side of the power supply resonance coil 211 and the power reception resonance coil 111 can be formed.
- the “magnetic field space” is set based on the strength of the magnetic field coupling generated between the power supply resonance coil 211 and the power reception resonance coil 111 by changing adjustment parameters related to the power supply resonance coil 211 and the power reception resonance coil 111. May be.
- the size of the magnetic field space can be expanded by relatively weakening the magnetic field coupling generated between the power supply resonance coil 211 and the power reception resonance coil 111.
- the size of the magnetic field space can be reduced by relatively strengthening the magnetic field coupling generated between the power supply resonance coil 211 and the power reception resonance coil 111. Thereby, the magnetic field space optimal for the size of the power receiving device 1 can be formed.
- the arrangement relationship of the power supply resonance coil 211 and the arrangement relationship of the power reception resonance coil 111 are used as adjustment parameters, and the strength of magnetic field coupling generated between the power supply resonance coil 211 and the power reception resonance coil 111 is changed by changing the adjustment parameter.
- the size of the magnetic field space may be changed by changing.
- the “magnetic field space” uses the shapes of the power supply resonance coil 211 and the power reception resonance coil 111 as adjustment parameters, and changes the shape of these coils to a desired shape, and between the power supply resonance coil 211 and the power reception resonance coil 111 and The shape may be set to a desired shape by changing the strength of magnetic field coupling generated in the periphery. In this case, by making the power supply resonance coil 211 and the power reception resonance coil 111 into desired shapes, a magnetic field space with relatively weak magnetic field strength can be formed in a desired shape along the shape of the coils.
- the “magnetic field space” has at least one of a first distance between the power supply resonance coil 211 and the power supply coil 212 and a second distance between the power reception coil 112 and the power reception resonance coil 111 as an adjustment parameter.
- the size may be set based on this adjustment parameter. For example, by relatively shortening the first distance between the power supply resonance coil 211 and the power supply coil 212 and the second distance between the power reception coil 112 and the power reception resonance coil 111, the magnetic field coupling is relatively It can be weakened to increase the size of the magnetic field space. On the other hand, by relatively increasing the first distance between the power supply resonance coil 211 and the power supply coil 212 and the second distance between the power reception coil 112 and the power reception resonance coil 111, the magnetic field coupling is relatively increased. By strengthening, the size of the magnetic field space can be reduced.
- the “magnetic field space” has a transmission characteristic value with respect to a driving frequency of power supplied to the power supply module 21 in the power receiving resonance coil 111 in a driving frequency band lower than the resonance frequency and a driving frequency band higher than the resonance frequency, respectively. It may be formed by supplying power by a resonance phenomenon having a peak. In this case, it is set so that a current of the same phase flows in the same direction as the direction of the current flowing through the power supply resonance coil 211 and the direction of the current flowing through the power reception resonance coil 111 at the peak frequency of the low drive frequency band. The position where the magnetic field space appears can be changed between the case where the current direction is reversed and the case where the current direction is reversed.
- the magnetic member 17 is disposed so as to cover at least a part of the surface excluding the opposing surfaces of the power reception resonance coil 111 and the power supply resonance coil 211, and the power supply resonance coil 211 and the power reception resonance coil 111 are arranged.
- a magnetic field space having a magnetic field intensity smaller than the magnetic field intensity other than the desired position may be formed at a desired position by changing the magnetic field between them and performing power transmission.
- the magnetic member 17 may be disposed so as to cover the inner peripheral surface of the power receiving resonance coil 111.
- the magnetic field generated on the inner peripheral side of the power receiving resonance coil 111 can be cut off, and a magnetic field space having a relatively small magnetic field strength can be formed on the inner peripheral side of the power receiving resonance coil 111.
- the magnetic member 17 may be disposed so as to cover the surface opposite to the facing surface of the power supply resonance coil 211 and the power reception resonance coil 111. In this case, the magnetic field generated near the surface opposite to the surface opposite to the power receiving resonance coil 111 is cut off, and the magnetic field strength is relatively small near the surface opposite to the surface opposite to the power receiving resonance coil 111. A magnetic field space can be formed.
- the power receiving device 1 can intentionally form a magnetic field space having a small magnetic field strength at a desired position inside or near the power receiving module 11 based on one or more combinations of the above-described magnetic field space forming methods. In addition, it is possible to set the size and shape of the magnetic field space. In other words, the power receiving device 1 has a desired operation by at least one of the installation mode of the power receiving module 11 (including the degree of overlap between the power receiving resonance coil 111 and the power receiving coil 112 and the positional relationship between the inner periphery and the outer periphery) and the magnetic member conditions. It is possible to form a magnetic field space.
- the power supply coil 212 of the power supply module 21 is set with a coil diameter of 15 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.4 mm ⁇ .
- the power supply resonance coil 211 is set to a coil diameter of 15 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.4 mm ⁇ .
- a magnetic member (not shown) having a thickness of 450 ⁇ m is disposed on the inner peripheral side of the power supply resonance coil 211 as necessary.
- the power supply resonance coil 211 and the power supply coil 212 have a self-inductance L of 3.1 ⁇ H and a resistance value of 0.65 ⁇ .
- the configuration of the power receiving module 11 will be described. Regarding the arrangement of the power receiving resonance coil 111 and the power receiving coil 112, the following four modes of coil arrangement are used. In the present embodiment, four types of coil arrangements are illustrated as a configuration in which the inductance is maximized with a desired coupling coefficient (a wide design range).
- the coil arrangement of the first aspect is such that, when the power supply module 21 side is the front side, the power receiving resonance coil 111 is arranged on the inner peripheral side of the front side, and the power receiving coil 112 is the outer peripheral side of the power receiving resonance coil 111. Overlaid on the back side.
- a cylindrical magnetic member 17 having a thickness of 450 ⁇ m and a length of 3 mm is disposed on the inner peripheral side of the power receiving resonance coil 111 and the power receiving coil 112.
- the power-receiving resonant coil 111 arranged on the inner peripheral side is set to a coil diameter of 11 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ .
- the power receiving coil 112 disposed on the outer peripheral side is set to a coil diameter of 11.24 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ .
- the power receiving resonance coil 111 and the power receiving coil 112 are set to coil lengths of 2.16 mm and 2.16 mm, respectively.
- the coil length of the power receiving module 11, that is, the total coil length excluding the overlap between the power receiving resonance coil 111 and the power receiving coil 112 is set to 3 mm.
- the power receiving resonance coil 111 is arranged on the outer peripheral side on the front side, and the power receiving coil 112 is arranged on the rear side on the inner peripheral side of the power receiving resonant coil 111. More specifically, the power receiving resonance coil 111 disposed on the outer peripheral side is set to a coil diameter of 11.24 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ . The power receiving coil 112 disposed on the inner peripheral side is set to a coil diameter of 11 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ . The power receiving resonance coil 111 and the power receiving coil 112 are set to coil lengths of 2.16 mm and 2.16 mm, respectively. Other configurations are the same as the coil arrangement of the first aspect.
- the power receiving resonance coil 111 is arranged on the inner peripheral side, and the power receiving coil 112 is arranged on the rear side on the outer peripheral side of the power receiving resonant coil 111. More specifically, the power receiving resonance coil 111 disposed on the inner peripheral side is set to a coil diameter of 11 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ . The power receiving coil 112 disposed on the outer peripheral side is set to a coil diameter of 11.24 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ . The power receiving resonance coil 111 and the power receiving coil 112 are set to coil lengths of 3 mm and 1.2 mm, respectively. Other configurations are the same as the coil arrangement of the first aspect.
- the power receiving resonance coil 111 is arranged on the outer peripheral side, and the power receiving coil 112 is arranged on the rear side on the inner peripheral side of the power receiving resonant coil 111. More specifically, the power receiving resonance coil 111 disposed on the outer peripheral side is set to a coil diameter of 11.24 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ . The power receiving coil 112 disposed on the inner peripheral side is set to a coil diameter of 11 mm ⁇ using a copper wire (with an insulating coating) having a wire diameter of 0.12 mm ⁇ . The power receiving resonance coil 111 and the power receiving coil 112 are set to coil lengths of 3 mm and 1.2 mm, respectively. Other configurations are the same as the coil arrangement of the first aspect.
- the power supply module 21 and the power reception module 11 configured as described above are disposed to face each other. Then, a load resistor 32 of 175 ⁇ is connected to the power receiving coil 112 as a load. Moreover, the terminal of the network analyzer 31 (Agilent Technology Co., Ltd. product: E5061B) is connected to the one end and the other end of the power supply coil 212 in place of the AC power supply.
- the network analyzer 31 Alent Technology Co., Ltd. product: E5061B
- the network analyzer 31 measures the impedance Zin of 1050 kHz (peak on the high frequency side).
- the power supply module 21 and the power reception module 11 configured as described above are disposed to face each other.
- a load resistor 32 of 175 ⁇ is connected to the power receiving coil 112 as a load.
- an AC power supply 33 of 5V is connected to one end and the other end of the power supply coil 212, and the voltage across the load resistor 32 is measured with an oscilloscope (manufactured by Agilent Technologies, Inc .: MSO-X3054A).
- the power feeding coil 212, the power feeding resonance coil 211, the power receiving resonance coil 111, and the power receiving coil 112 are resonated at a resonance frequency of 950 kHz, a resonator (based on the measured power receiving voltage of 1050 kHz (peak on the high frequency side)) The current of the power receiving resonance coil 111) is obtained.
- the inductances L3: L4 of the power receiving resonance coil 111 and the power receiving coil 112 are measured and the resistance values R3: R4 are actually measured. Further, a coupling coefficient k 34 between the power receiving resonance coil 111 and the power receiving coil 112 is obtained. Further, the coupling coefficient k 12 between the feeding-resonant coil 211 and the power feeding coil 212 is 0.457, the coupling coefficient k23 between the feeding resonant coil 211 and the power receiving resonance coil impedance Zin and the receiving voltage when it is 0,187 The voltage value and the current value of the resonator that is the power receiving resonance coil 111 are obtained.
- each power receiving module 11 of the first to fourth aspects was applied to the above measurement system, and measurement items such as the received voltage were obtained by actual measurement and calculation.
- the inductance L3: L4 ( ⁇ H) was 7.5: 6.4.
- the resistance value R3: R4 ( ⁇ ) was 1.9: 1.5.
- Coupling coefficient k 34 was 0.85.
- the impedance Zin was 27.4 ⁇ .
- the receiving voltage was 9.5V.
- the current of the resonator that is the power receiving resonance coil 111 was 0.250 A.
- the inductance L3: L4 ( ⁇ H) was 6.4: 7.5.
- the resistance value R3: R4 ( ⁇ ) was 1.5: 1.9.
- Coupling coefficient k 34 was 0.85.
- the impedance Zin was 26.3 ⁇ .
- the received voltage was 10.0V.
- the current of the resonator that is the power receiving resonance coil 111 was 0.263A.
- the inductance L3: L4 ( ⁇ H) was 14.5: 2.9.
- the resistance value R3: R4 ( ⁇ ) was 2.9: 1.0.
- Coupling coefficient k 34 was 0.85.
- the impedance Zin was 42.6 ⁇ .
- the received voltage was 6.9V.
- the current of the resonator that is the power receiving resonance coil 111 was 0.190A.
- the inductance L3: L4 ( ⁇ H) was 11.9: 4.3.
- the resistance value R3: R4 ( ⁇ ) was 2.4: 1.4.
- Coupling coefficient k 34 was 0.85.
- the impedance Zin was 34.4 ⁇ .
- the received voltage was 8.3V.
- the current of the resonator that is the power receiving resonance coil 111 was 0.207 A.
- the power reception voltage and the current of the power reception resonance coil 111 depend on the degree and arrangement of the power reception resonance coil 111 and the power reception coil 112. It has been found that it is possible to set a desired control item to a target value from among a plurality of control items.
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Abstract
Description
図1に示すように、本実施形態に係る受給電装置である受電装置1は、共振現象を利用した給電時において受電モジュール11の内側位置や近傍位置に他の部位よりも小さな磁界強度の磁界空間を出現させ、この磁界空間を電子部品13の配置場所とした構成を有している。即ち、受電装置1(受給電装置)は、給電モジュール21(他のコイルモジュール)との間で共振現象により電力を受給電する受電モジュール11(コイルモジュール)と、他の部位よりも小さな磁界強度となるように共振現象により形成された磁界空間に配置された電子部品13とを有している。これにより、受電装置1は、上記の磁界空間に配置された電子部品13における磁界に起因する渦電流の発生が抑制されることにより誤動作や所定温度以上の発熱が防止される結果、小型化が可能になっている。尚、『小さな磁界強度の磁界空間』についての詳細は後述する。
磁性部材17は、磁性材料により形成されている。磁性材料としては、純Fe、Fe-SiやFe-Al-Si(センダスト)、Fe-Ni(パーマロイ)、ソフトフェライト、Fe基アモルファス、Co基アモルファス、Fe-Co(パーメンジュール)等の軟磁性材料が例示される。
上記の受電装置1は、電子回路を有する1以上の電子部品13と、作動電力を供給する電池14とを有している。さらに、受電装置1は、スピーカや発光部品、表示器等の出力部15と、マイクやスイッチ等の入力部16とを有している。具体的には、受電装置1は、AC/DC変換部131や充電部132、制御部133等の電子部品13を有している。これらの電子部品13の少なくとも一部は、他の部位よりも小さな磁界強度となるように共振現象により形成された磁界空間に配置されている。
上記のように構成された受電装置1は、給電装置2とで給電システム3を構成している。給電装置2は、受電装置1の受電モジュール11に対して共振現象により電力を供給する給電モジュール21を備えている。給電モジュール21は、給電共振コイル211及び給電コイル212を備えている。給電装置2は、給電モジュール21に交流電力を供給する電源部22と、電源部22を制御する制御部23とを有している。
次に、主に受電装置1において電子部品13の配置場所とされる『磁界空間』について詳細に説明する。
次に、上記で説明した受電装置1において、受電共振コイル111と受電コイル112とを重複させた場合における受電共振コイル111及び受電コイル112のインダクタンス値(L3・L4)及び抵抗値(R3・R4)と、受電共振コイル111及び受電コイル112間の結合係数k34と、入力インピーダンスZinと、受電電圧と、受電共振コイル111の電流値とを調査した。
先ず、図2に示すように、測定システムにおける給電モジュール21のコイル配置について説明する。給電モジュール21の給電コイル212は、線径0.4mmφの銅線材(絶縁被膜付)を使用して、15mmφのコイル径で設定されている。給電共振コイル211は、線径0.4mmφの銅線材(絶縁被膜付)を使用して、15mmφのコイル径に設定されている。尚、給電共振コイル211の内周側には、厚みが450μmの図示しない磁性部材が必要に応じて配置されている。給電共振コイル211及び給電コイル212は、自己インダクタンスLが3.1μH及び抵抗値が0.65Ωである。
図2に示すように、上記のように構成された給電モジュール21と受電モジュール11とを対向配置させる。そして、受電コイル112に175Ωの負荷抵抗器32を負荷として接続する。また、給電コイル212の一端及び他端に交流電源の代わりにネットワークアナライザ31(アジレント・テクノロジー株式会社製:E5061B)の端子をそれぞれ接続する。そして、給電コイル212、給電共振コイル211、受電共振コイル111、受電コイル112を950kHzの共振周波数で共振させた場合において、ネットワークアナライザ31により1050kHz(高周波側のピーク)のインピーダンスZinを測定する。
図3に示すように、上記のように構成された給電モジュール21と受電モジュール11とを対向配置させる。そして、受電コイル112に175Ωの負荷抵抗器32を負荷として接続する。また、給電コイル212の一端及び他端に5Vの交流電源33を接続し、負荷抵抗器32の両端電圧を受電電圧としてオシロスコープ(アジレント・テクノロジー株式会社製:MSO-X3054A)により測定する。そして、給電コイル212、給電共振コイル211、受電共振コイル111、受電コイル112を950kHzの共振周波数で共振させた場合において、1050kHz(高周波側のピーク)の測定された受電電圧に基づいて共振器(受電共振コイル111)の電流を求める。
上記の測定システムにおいて、受電共振コイル111及び受電コイル112のインダクタンスL3:L4を実測すると共に抵抗値R3:R4を実測する。また、受電共振コイル111及び受電コイル112間の結合係数k34を求める。さらに、給電共振コイル211及び給電コイル212間の結合係数k12が0.457であり、給電共振コイル211及び受電共振コイル間の結合係数k23が0,187である場合のインピーダンスZinと受電電圧の電圧値と受電共振コイル111である共振器の電流値とを求める。
2 給電装置
3 給電システム
11 受電モジュール
111 受電共振コイル
112 受電コイル
21 給電モジュール
211 給電共振コイル
212 給電コイル
17 磁性部材
Claims (4)
- 他のコイルモジュールとの間で共振現象により電力を受給電するコイルモジュールと、
他の部位よりも小さな磁界強度となるように前記共振現象により形成された磁界空間に配置された電子部品とを有しており、
前記コイルモジュールは、
前記他のコイルモジュールとの間で共振する共振コイルと、
前記共振コイルのコイル径方向に一部が重複配置され、前記共振コイルに対して電力を受給電する受給電コイルとを有していることを特徴とする受給電装置。 - 前記共振コイル及び前記受給電コイルは、ソレノイドコイルであることを特徴とする請求項1に記載の受給電装置。
- 請求項1又は2に記載の受給電装置を備えたことを特徴とする携帯機器。
- 外部に露出された外壁部材を有し、
前記受給電装置における前記コイルモジュールは、少なくとも一部が前記外壁部材の表面形状に沿って配置されていることを特徴とする請求項3に記載の携帯機器。
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EP14823811.6A EP2876779A4 (en) | 2013-07-08 | 2014-05-28 | ENERGY SUPPLIER AND RECEIVER AND MOBILE DEVICE |
CN201480002178.8A CN104584382B (zh) | 2013-07-08 | 2014-05-28 | 供电受电装置以及便携式设备 |
US14/422,228 US9325207B2 (en) | 2013-07-08 | 2014-05-28 | Power supplier and receiver and mobile device |
SG11201501214UA SG11201501214UA (en) | 2013-07-08 | 2014-05-28 | Power supplier and receiver and mobile device |
KR1020157004307A KR101528722B1 (ko) | 2013-07-08 | 2014-05-28 | 수급전 장치 및 휴대 기기 |
US14/964,155 US9537356B2 (en) | 2013-07-08 | 2015-12-09 | Power supplier and receiver and mobile device |
US15/360,192 US20170077760A1 (en) | 2013-07-08 | 2016-11-23 | Power supplier and receiver and mobile device |
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US14/964,155 Continuation US9537356B2 (en) | 2013-07-08 | 2015-12-09 | Power supplier and receiver and mobile device |
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2014
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- 2014-05-28 US US14/422,228 patent/US9325207B2/en not_active Expired - Fee Related
- 2014-05-28 WO PCT/JP2014/064157 patent/WO2015005012A1/ja active Application Filing
- 2014-05-28 KR KR1020157004307A patent/KR101528722B1/ko not_active IP Right Cessation
- 2014-05-28 CN CN201480002178.8A patent/CN104584382B/zh not_active Expired - Fee Related
- 2014-05-28 CN CN201610622225.XA patent/CN106253492A/zh active Pending
- 2014-05-28 SG SG11201501214UA patent/SG11201501214UA/en unknown
- 2014-06-17 TW TW103120904A patent/TWI504097B/zh not_active IP Right Cessation
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2015
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2016
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Also Published As
Publication number | Publication date |
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TW201513524A (zh) | 2015-04-01 |
KR20150030775A (ko) | 2015-03-20 |
CN104584382A (zh) | 2015-04-29 |
KR101528722B1 (ko) | 2015-06-12 |
US9325207B2 (en) | 2016-04-26 |
EP2876779A4 (en) | 2016-03-30 |
TWI504097B (zh) | 2015-10-11 |
US20160111893A1 (en) | 2016-04-21 |
JP2015015860A (ja) | 2015-01-22 |
US20170077760A1 (en) | 2017-03-16 |
JP5616496B1 (ja) | 2014-10-29 |
CN104584382B (zh) | 2017-02-22 |
EP2876779A1 (en) | 2015-05-27 |
SG11201501214UA (en) | 2015-05-28 |
US20150229163A1 (en) | 2015-08-13 |
US9537356B2 (en) | 2017-01-03 |
CN106253492A (zh) | 2016-12-21 |
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