WO2014162781A1 - 受電装置 - Google Patents
受電装置 Download PDFInfo
- Publication number
- WO2014162781A1 WO2014162781A1 PCT/JP2014/053456 JP2014053456W WO2014162781A1 WO 2014162781 A1 WO2014162781 A1 WO 2014162781A1 JP 2014053456 W JP2014053456 W JP 2014053456W WO 2014162781 A1 WO2014162781 A1 WO 2014162781A1
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- WO
- WIPO (PCT)
- Prior art keywords
- power
- coil
- power receiving
- resonance coil
- power supply
- Prior art date
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- 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
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- 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
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- 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
Definitions
- the present invention relates to a power receiving device that receives power without contact.
- a wireless power transmission technique a technique of performing power transmission using electromagnetic induction between coils (see, for example, Patent Document 1), a resonance phenomenon between resonators (coils) included in a power feeding device and a power receiving device, or the like.
- a technique for performing power transmission by combining magnetic fields by using them see, for example, Patent Document 2).
- Patent Document 2 discloses a wireless power transmission device that can increase the transmission efficiency of the entire device by changing the coupling strength between the power transmission coil and the power reception coil.
- Patent Document 4 when a power supply resonance coil and a power reception resonance coil are provided between the power supply coil and the power reception coil and power is supplied in a non-contact manner, a distance c between the power supply resonance coil and the power reception resonance coil is detected.
- a power feeding system is disclosed in which the distance a between the power feeding coil and the power feeding resonance coil and the distance b between the power receiving coil and the power receiving resonance coil are variably adjusted so that the power feeding efficiency is maximized according to the distance c.
- the transmission efficiency can be improved by the technique disclosed above.
- the control device that changes the resonance frequency the control device that changes the coupling strength between the two resonators, the distance between the feeding coil and the feeding resonance coil, and the distance between the receiving coil and the receiving resonance coil. Therefore, a control device for adjusting the above is required, and the configuration becomes complicated and the cost increases.
- an object of the present invention is to provide a control device that changes the resonance frequency as in the past, a control device that changes the coupling strength between two resonators, the distance between the feeding coil and the feeding resonance coil, and the receiving coil and the receiving power.
- An object of the present invention is to provide a power receiving device that can increase or decrease transmission efficiency with a simpler configuration without using a control device that adjusts the distance to the resonance coil.
- the present invention is a power receiving apparatus, wherein a power receiving resonance coil to which power is supplied by a resonance phenomenon that resonates with a power feeding module, a power receiving coil that receives power from the power receiving resonance coil, and a magnetic field coupling at the time of resonance. And a magnetic member at least partially overlapping in the radial direction with respect to the power receiving resonance coil so as to increase or decrease.
- the magnetic member increases or decreases the magnetic field coupling between the power receiving resonance coil and the power feeding module at the time of resonance, so that the magnetic field coupling is increased or decreased by changing the distance between the power feeding module and the power receiving resonance coil.
- the magnetic field coupling can be easily set. As a result, the distance between the power supply module and the power reception resonance coil is reduced as in the case where the structural specifications of the size and shape cannot be changed due to restrictions on the size and shape of the power supply device and power reception device including the power supply module.
- the magnetic member in the present invention may be disposed on the inner peripheral side of the power receiving resonance coil.
- the magnetic field coupling between the power receiving resonance coil and the power supply module at the time of resonance can be enhanced.
- the power receiving resonance coil has the same coil diameter as the coil diameter of the power supply module, and is disposed to face the power supply module.
- the magnetic member is formed in a cylindrical shape along an inner peripheral surface of the power reception resonance coil, and one end position of the power reception resonance coil on the power supply module side is aligned with one end position of the power supply module in the coil axis direction. It may be.
- the magnetic coupling between the power receiving resonance coil and the power supply module at the time of resonance can be further enhanced by the cylindrical magnetic member disposed along the inner peripheral surface of the power receiving resonance coil.
- the power receiving resonance coil has the same coil diameter as the coil diameter of the power supply module, and is disposed to face the power supply module.
- the power receiving coil is disposed on the side opposite to the power supply module side so as to have a coil axis that matches the coil axis of the power receiving resonance coil,
- the magnetic member is It is formed in a cylindrical shape along the inner peripheral surface of the power receiving resonance coil and the power receiving coil, The one end position of the power receiving resonance coil on the power supply module side is matched with the one end position of the power receiving resonance coil in the coil axial direction, An inner cylindrical portion in which the other end position opposite to the power supply module side is matched with the other end position of the power receiving coil in the coil axial direction; And a disk portion that is provided at the other end of the cylindrical portion and is formed to face the other end surface of the power receiving coil.
- the power receiving resonance coil and the power feeding module at the time of resonance by the magnetic member of the cylindrical inner cylindrical portion disposed along the inner peripheral surface of the power receiving resonance coil and the disk portion disposed to face the power receiving coil can be further enhanced.
- the value of the transmission characteristic with respect to the driving frequency of the power supplied to the power supply module has peaks in a driving frequency band lower than the resonance frequency and a driving frequency band higher than the resonance frequency, respectively. Electric power may be supplied by a resonance phenomenon.
- the power receiving device may further include an electronic component arranged in a magnetic field space formed by the resonance phenomenon so as to have a magnetic field strength smaller than that of other parts.
- the power receiving device includes the power receiving resonance coil to which power is supplied by the resonance phenomenon, so that a space portion with a small magnetic field appears at the inner position of the power receiving resonance coil or in the vicinity of the power receiving resonance coil.
- the part is effectively used as an electronic component placement location.
- Transmission efficiency can be improved with a simple configuration.
- the power receiving device 1 includes a magnetic member 17 disposed in the power receiving module 11 so as to increase or decrease the magnetic field coupling during 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 has a configuration in which a magnetic field space having a small magnetic field appears at the inner position of the power receiving module 11 or in the vicinity of the power receiving module 11 during power feeding using a resonance phenomenon, and this magnetic field space is used as an arrangement place of the electronic component 13. ing.
- the power receiving device 1 can be miniaturized as a result of preventing malfunction and heat generation above a predetermined temperature by suppressing the generation of eddy currents caused by the magnetic field in the electronic component 13 arranged in the magnetic field space. It has become.
- the power receiving device 1 includes a power receiving resonance coil 111 to which power is supplied by a resonance phenomenon that resonates with the power supply module 21, a power receiving coil 112 that receives power from the power receiving resonance coil 111, It has a magnetic member 17 at least partially overlapping with the power receiving resonance coil 111 in the radial direction so as to enhance magnetic field coupling. Furthermore, the power receiving device 1 has an electronic component 13 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 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 receiving resonance coil 111 and the power receiving coil 112 in the power receiving module 11 and the power receiving resonance coil 111 and the power receiving coil 112 in the power supply module 21 use spiral type, solenoid type, loop type coils (such as copper wires with insulating coating). be able to.
- the resonance phenomenon means that two or more coils are tuned at the resonance frequency.
- the power receiving device 1 corresponds to all types of devices that operate by supplying power. That is, for example, a portable device, a stationary device, or a vehicle device such as an automobile is the power receiving device 1.
- 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 terminal (cell phone / PHS (feature phone / smart phone), pager, etc.), broadcast receiver (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 like.
- the magnetic member 17 is made of a magnetic material.
- magnetic materials include pure Fe, Fe-Si, Fe-Al-Si (Sendust), Fe-Ni (Permalloy), soft ferrite, Fe-based amorphous, Co-based amorphous, Fe-Co (permendur), etc.
- the soft magnetic material is exemplified.
- 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 charging device 2 power feeding resonance coil 211
- the power receiving device 1 are not changed as 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 by 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, which peaks 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 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.
- the output terminal of the network analyzer 31 (manufactured by Agilent Technologies) is connected to the power supply coil 212 instead of the AC power supply. Further, the input terminal of the network analyzer 31 is connected to the power receiving coil 112 instead of the power receiving unit.
- the network analyzer 31 can output AC power from the output terminal to the feeding coil 212 at an arbitrary frequency.
- the network analyzer 31 can measure the power input from the power receiving coil 112 to the input terminal. Furthermore, the network analyzer 31 can measure the insertion loss “S21”, the coupling coefficient, and the power transmission efficiency.
- the power supply coil 212 plays a role of supplying the power obtained from the network analyzer 31 to the power supply resonance coil 211 by electromagnetic induction.
- the power supply coil 212 is set to a coil diameter of 11 mm ⁇ by winding a copper wire (with an insulating coating) having a wire diameter of 0.4 mm ⁇ once.
- the feeding resonance coil 211 is set to a coil diameter of 11 mm ⁇ and a coil length of 10 mm using a copper wire (with an insulating coating) having a wire diameter of 0.4 mm ⁇ .
- the power supply resonance coil 211 has a magnetic member thickness of 450 ⁇ m arranged on the inner peripheral side, a self-inductance L of 10.9 ⁇ H, and a resistance value of 1.8 ⁇ .
- the power receiving coil 112 plays a role of outputting the power transmitted as magnetic field energy from the power supply resonance coil 211 to the power reception resonance coil 111 to the input terminal of the network analyzer 31 by electromagnetic induction.
- the power receiving coil 112 is set with a coil diameter of 11 mm ⁇ by winding a copper wire (with an insulating coating) having a wire diameter of 0.4 mm ⁇ once.
- the power receiving resonance coil 111 is set to have a coil diameter of 11 mm ⁇ and a coil length of 1.4 mm using a copper wire (with an insulating coating) having a wire diameter of 0.2 mm ⁇ .
- Each of the power supply resonance coil 211 and the power reception resonance coil 111 is an LC resonance circuit and plays a role of creating a magnetic field resonance state.
- the capacitor component of the LC resonance circuit is realized by an element. However, both ends of the coil may be opened and realized by a stray capacitance.
- the resonance frequency is set to 1 MHz.
- a magnetic field resonance state can be created between the power supply resonance coil 211 and the power reception resonance coil 111.
- a magnetic field resonance state is created in a state where the power supply resonance coil 211 resonates, power can be transmitted from the power supply resonance coil 211 to the power reception resonance coil 111 as magnetic field energy.
- the coupling coefficient k between the power supply resonance coil 211 and the power reception resonance coil 111 is changed. 23 is measured.
- the coupling coefficient k 23 is an index representing the strength of coupling between the power supply resonance coil 211 and the power reception resonance coil 111.
- the horizontal axis represents the frequency output from the output terminal, and the vertical axis represents the insertion loss “S21”.
- the coupling between the power feeding coil 212 and the power feeding resonance coil 211 is strong, the coupling state between the power feeding resonance coil 211 and the power receiving resonance coil 111 is affected, and accurate measurement cannot be performed.
- the power supply side distance between the resonance coil 211 and the resonance coil 211 is maintained at such a distance that the power supply resonance coil 211 can sufficiently excite, generate a magnetic field of the power supply resonance coil 211, and the power supply coil 212 and the power supply resonance coil 211 are not coupled as much as possible. There is a need to.
- the power receiving side distance between the power receiving resonance coil 111 and the power receiving coil 112 can be sufficiently excited by the power receiving resonance coil 111 to generate a magnetic field of the power receiving resonance coil 111, and It is necessary to keep the power receiving coil 112 at a distance that does not couple as much as possible.
- the insertion loss “S21” represents a signal that passes through the input terminal when the signal is input from the output terminal, and is displayed in decibels.
- the power transmission efficiency refers to the ratio of the power output from the input terminal to the power supplied to the power supply resonance coil 211 from the output terminal. That is, the higher the insertion loss “S21”, the higher the power transmission efficiency.
- the peak is separated into the low frequency side and the high frequency side.
- the frequency on the high frequency side is represented as f H and the frequency on the low frequency side is represented as f L.
- the coupling coefficient k 23 was 0.17. Further, as shown in FIG. 3 (b), when the magnetic member 17 on the inner peripheral side inner cylindrical portion 171 is arranged in the power receiving resonance coil 111, the coupling coefficient k 23 was 0.18. As shown in FIG. 3 (c), if the magnetic member 17 where the outer cylindrical portion 172 is disposed on the outer peripheral side of the power receiving resonance coil 111, the coupling coefficient k 23 was 0.11.
- the coupling coefficient k 23 is 0. 11.
- an inner cylindrical portion 171 and an outer cylindrical portion 172 are respectively disposed on the inner peripheral side and the outer peripheral side of the power receiving resonance coil 111, and the other ends of the inner cylindrical portion 171 and the outer cylindrical portion 172 are further provided.
- the coupling coefficient k 23 is found by the form of the magnetic member 17. More specifically, it has been found that the inner cylindrical portion 171 and the disc portion 173 contribute to the increase in the coupling coefficient k 23 , while the outer cylindrical portion 172 contributes to the decrease in the coupling coefficient k 23 . Thus, a combination of one or more inner cylindrical portion 171 and the outer cylindrical portion 172, further by combining the disc portion 173, was found to be able to increase or decrease the coupling coefficient k 23.
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Abstract
Description
前記磁性部材は、前記受電共振コイルの内周面に沿った円筒形状に形成され、前記受電共振コイルの前記給電モジュール側の一方端位置が前記給電モジュールの一方端位置にコイル軸方向において一致されていてもよい。
前記受電コイルは、前記受電共振コイルのコイル軸に対して一致するコイル軸を有するように、前記給電モジュール側とは反対側に配置されており、
前記磁性部材は、
前記受電共振コイル及び前記受電コイルの内周面に沿った円筒形状に形成され、
前記受電共振コイルの前記給電モジュール側の一方端位置が前記受電共振コイルの一方端位置にコイル軸方向において一致され、
前記給電モジュール側とは反対側の他方端位置が前記受電コイルの他方端位置にコイル軸方向において一致された内側円筒部と、
前記円筒部の他方端に設けられ、前記受電コイルの他方端面に対向するように形成された円盤部とを有してもよい。
図1に示すように、受電装置1は、共振時の磁界結合を増減するように受電モジュール11に配置された磁性部材17を有している。これにより、受電装置1は、磁性部材17が共振時における受電モジュール11と給電モジュール21との間の磁界結合を増減することによって、受電装置1及び給電装置2のサイズや形状の構造的仕様の変更ができない場合のように、給電モジュール21と受電モジュール11との距離を変更できない場合においても、受電装置1に要求される給電時の伝送効率の仕様を容易に満足させることができ、ひいては短時間での充電を可能にしたり、急速充電による過熱等を防止することができる。
磁性部材17は、磁性材料により形成されている。例えば、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、各種の磁性部材17を用いた場合における給電モジュール21の給電共振コイル211と受電モジュール11の受電共振コイル111との間における結合係数k23を調査した。
先ず、図2に示すように、給電コイル212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)の出力端子を接続する。また、受電コイル112に電力受給部の代わりにネットワークアナライザ31の入力端子を接続する。
f=1/(2π√(LC))・・・(式1)
次に、上記のように構成された結合係数測定システムのネットワークアナライザ31を使用して、磁性部材17の有無や配置を変更し、給電共振コイル211と受電共振コイル111との間の結合係数k23をそれぞれ測定する。ここで、結合係数k23とは、給電共振コイル211と受電共振コイル111の結合の強さを表す指標である。
k23=(fH 2-fL 2)/(fH 2+fL 2)・・・(式2)
上記の結合係数測定システムにおいて、様々な形態(配置や形状)の磁性部材17を用いて結合係数k23を測定した結果を示す。
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
171 内側円筒部
172 外側円筒部
173 円盤部
Claims (6)
- 給電モジュールとの間で共振する共振現象により電力が供給される受電共振コイルと、
前記受電共振コイルから電力を受け取る受電コイルと、
前記共振時の磁界結合を増減するように前記受電共振コイルに対して径方向に少なくとも一部が重複配置された磁性部材とを有することを特徴とする受電装置。 - 前記磁性部材は、前記受電共振コイルの内周側に配置されていることを特徴とする請求項1に記載の受電装置。
- 前記受電共振コイルは、前記給電モジュールのコイル径と同一のコイル径を有し、前記給電モジュールに対向配置されており、
前記磁性部材は、前記受電共振コイルの内周面に沿った円筒形状に形成され、前記受電共振コイルの前記給電モジュール側の一方端位置が前記給電モジュールの一方端位置にコイル軸方向において一致されていることを特徴とする請求項2に記載の受電装置。 - 前記受電共振コイルは、前記給電モジュールのコイル径と同一のコイル径を有し、前記給電モジュールに対向配置されており、
前記受電コイルは、前記受電共振コイルのコイル軸に対して一致するコイル軸を有するように、前記給電モジュール側とは反対側に配置されており、
前記磁性部材は、
前記受電共振コイル及び前記受電コイルの内周面に沿った円筒形状に形成され、
前記受電共振コイルの前記給電モジュール側の一方端位置が前記受電共振コイルの一方端位置にコイル軸方向において一致され、
前記給電モジュール側とは反対側の他方端位置が前記受電コイルの他方端位置にコイル軸方向において一致された内側円筒部と、
前記円筒部の他方端に設けられ、前記受電コイルの他方端面に対向するように形成された円盤部とを有することを特徴とする請求項2に記載の受電装置。 - 前記受電共振コイルは、
前記給電モジュールに供給する電力の駆動周波数に対する伝送特性の値が、共振周波数よりも低い駆動周波数帯域及び前記共振周波数よりも高い駆動周波数帯域にそれぞれピークを有する前記共振現象により電力が供給されることを特徴とする請求項1乃至4の何れか1項に記載の受電装置。 - さらに、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を有することを特徴とする請求項1乃至5の何れか1項に記載の受電装置。
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US14/781,726 US20160064944A1 (en) | 2013-04-01 | 2014-02-14 | Power-receiving device |
SG11201508100RA SG11201508100RA (en) | 2013-04-01 | 2014-02-14 | Power-receiving device |
EP14779209.7A EP2985880A4 (en) | 2013-04-01 | 2014-02-14 | POWER RECEPTION DEVICE |
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TWI618327B (zh) * | 2015-06-10 | 2018-03-11 | 台灣東電化股份有限公司 | 無線充電系統發熱抑制方法及其裝置 |
EP3770616A1 (en) * | 2017-05-29 | 2021-01-27 | Mitsubishi Electric Corporation | Radio wave measurement system and wireless power transmission device |
CN110011395A (zh) * | 2019-04-28 | 2019-07-12 | 深圳市中诺通讯有限公司 | 一种基于摩擦发电的移动设备 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010124522A (ja) | 2008-11-17 | 2010-06-03 | Toyota Central R&D Labs Inc | 給電システム |
JP2010239769A (ja) | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 無線電力供給システム |
JP2010239848A (ja) * | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 電力伝送装置 |
JP2010239777A (ja) | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 無線電力装置、無線電力受信方法 |
JP2010239838A (ja) * | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 送電装置 |
JP4624768B2 (ja) | 2004-11-29 | 2011-02-02 | オリンパス株式会社 | 被検体内導入装置および被検体内導入システム |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6803744B1 (en) * | 1999-11-01 | 2004-10-12 | Anthony Sabo | Alignment independent and self aligning inductive power transfer system |
WO2002065493A1 (fr) * | 2001-02-14 | 2002-08-22 | Fdk Corporation | Coupleur sans contact |
US8233985B2 (en) * | 2005-11-04 | 2012-07-31 | Kenergy, Inc. | MRI compatible implanted electronic medical device with power and data communication capability |
US7999414B2 (en) * | 2007-09-01 | 2011-08-16 | Maquet Gmbh & Co. Kg | Apparatus and method for wireless energy and/or data transmission between a source device and at least one target device |
MX2010003273A (es) * | 2007-09-25 | 2010-05-13 | Powermat Ltd | Plataforma de transmision de potencia inductiva de control central. |
JP2009188131A (ja) * | 2008-02-05 | 2009-08-20 | Nec Tokin Corp | 非接触電力伝送装置 |
EP2258032A2 (en) * | 2008-02-22 | 2010-12-08 | Access Business Group International LLC | Magnetic positioning for inductive coupling |
KR101651806B1 (ko) * | 2008-03-13 | 2016-08-26 | 액세스 비지니스 그룹 인터내셔날 엘엘씨 | 복수 코일 프라이머리를 갖는 유도 전력 공급 시스템 |
KR101789214B1 (ko) * | 2008-09-27 | 2017-10-23 | 위트리시티 코포레이션 | 무선 에너지 전달 시스템 |
JP5417942B2 (ja) * | 2009-03-31 | 2014-02-19 | 富士通株式会社 | 送電装置、送受電装置および送電方法 |
DE102009022886A1 (de) * | 2009-05-27 | 2010-12-02 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung zur mechanischen und elektrischen Anbindung eines tragbaren, batteriebetriebenen Geräts und tragbares, batteriebetriebenes Gerät |
JP2011083078A (ja) * | 2009-10-05 | 2011-04-21 | Sony Corp | 送電装置、受電装置、および電力伝送システム |
JP2011120382A (ja) * | 2009-12-03 | 2011-06-16 | Toyota Motor Corp | 非接触給電設備、非接触受電装置および非接触給電システム |
KR101383383B1 (ko) * | 2009-12-16 | 2014-04-08 | 후지쯔 가부시끼가이샤 | 자계 공명 송전 장치 및 자계 공명 수전 장치 |
JP2011205750A (ja) * | 2010-03-25 | 2011-10-13 | Toyota Central R&D Labs Inc | 電磁共鳴電力伝送装置 |
US8725330B2 (en) * | 2010-06-02 | 2014-05-13 | Bryan Marc Failing | Increasing vehicle security |
WO2012061378A2 (en) * | 2010-11-04 | 2012-05-10 | Access Business Group International Llc | Wireless power system and method with improved alignment |
US9035500B2 (en) * | 2011-03-01 | 2015-05-19 | Tdk Corporation | Wireless power feeder, wireless power receiver, and wireless power transmission system, and coil |
KR101241499B1 (ko) * | 2011-06-07 | 2013-03-11 | 엘지이노텍 주식회사 | 공진 코일 및 이를 이용한 무선 전력 전송 장치 |
-
2013
- 2013-04-01 JP JP2013075781A patent/JP2014204452A/ja active Pending
-
2014
- 2014-02-14 EP EP14779209.7A patent/EP2985880A4/en not_active Withdrawn
- 2014-02-14 CN CN201480019505.0A patent/CN105103407A/zh active Pending
- 2014-02-14 WO PCT/JP2014/053456 patent/WO2014162781A1/ja active Application Filing
- 2014-02-14 KR KR1020157030742A patent/KR20150139548A/ko not_active Application Discontinuation
- 2014-02-14 SG SG11201508100RA patent/SG11201508100RA/en unknown
- 2014-02-14 US US14/781,726 patent/US20160064944A1/en not_active Abandoned
- 2014-03-21 TW TW103110754A patent/TWI578658B/zh not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4624768B2 (ja) | 2004-11-29 | 2011-02-02 | オリンパス株式会社 | 被検体内導入装置および被検体内導入システム |
JP2010124522A (ja) | 2008-11-17 | 2010-06-03 | Toyota Central R&D Labs Inc | 給電システム |
JP2010239769A (ja) | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 無線電力供給システム |
JP2010239848A (ja) * | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 電力伝送装置 |
JP2010239777A (ja) | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 無線電力装置、無線電力受信方法 |
JP2010239838A (ja) * | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 送電装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2985880A4 |
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CN105103407A (zh) | 2015-11-25 |
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