WO2010106636A1 - 無線電力供給システム - Google Patents
無線電力供給システム Download PDFInfo
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- WO2010106636A1 WO2010106636A1 PCT/JP2009/055155 JP2009055155W WO2010106636A1 WO 2010106636 A1 WO2010106636 A1 WO 2010106636A1 JP 2009055155 W JP2009055155 W JP 2009055155W WO 2010106636 A1 WO2010106636 A1 WO 2010106636A1
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- 230000005540 biological transmission Effects 0.000 claims description 99
- 238000003384 imaging method Methods 0.000 claims description 12
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- 230000005674 electromagnetic induction Effects 0.000 description 11
- 230000010355 oscillation Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 230000004044 response Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 230000001154 acute effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/06—Rear-view mirror arrangements mounted on vehicle exterior
- B60R1/062—Rear-view mirror arrangements mounted on vehicle exterior with remote control for adjusting position
- B60R1/07—Rear-view mirror arrangements mounted on vehicle exterior with remote control for adjusting position by electrically powered actuators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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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
- H02J50/005—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
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and 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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/263—Multiple coils at either side
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- 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
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
Definitions
- the present invention relates to a wireless power supply system that wirelessly supplies power in a so-called magnetic resonance mode.
- a technique using a magnetic resonance mode has been proposed in recent years as disclosed in Patent Document 1, instead of using electromagnetic induction or radio waves.
- a resonator having a resonance angular frequency ⁇ 1 is provided in a power transmission device, and a resonator having a resonance angular frequency ⁇ 2 is provided in a power receiving device.
- a resonance circuit in which a coil and a capacitor are connected is applied.
- the resonance angular frequencies ⁇ 1 and ⁇ 2 are tuned and the size and arrangement of the resonators are adjusted appropriately, a magnetic field coupling state in which energy transfer is possible between the power transmission device and the power reception device in the magnetic field resonance mode occurs.
- Power is transmitted wirelessly from the resonator to the resonator of the power receiving device.
- the power use efficiency is about several tens of percent, the separation distance between the devices can be relatively large, and the power receiving device is connected to the power transmitting device. Several tens of cm or more can be separated.
- the coil has directivity as in the case of electromagnetic induction, there is a difficulty that power supply becomes difficult depending on the positional relationship between the power transmission device and the power reception device. It was. For example, consider a case where the coil axis of the power transmission side coil and the coil axis of the power reception coil are in a crossed, parallel, or twisted positional relationship. In this case, the vertical component of the lines of magnetic force exiting from the power transmission side coil and passing through the power reception side coil is inevitably smaller than in the case of the coaxial, and the magnetic field strength is accordingly reduced. As a result, between the power transmitting device and the power receiving device whose coil axes are shifted, the magnetic field coupling state in the magnetic field resonance mode is weakened, and almost no power is transmitted or no power is transmitted.
- An object of the present invention is to provide a wireless power supply system capable of relaying power from a power transmission side and efficiently transmitting the power to a power reception side.
- the present invention takes the following technical means.
- the wireless power supply system includes a power transmission resonance coil, a power reception resonance coil, and one or more relay resonance coils.
- the power transmission resonance coil has resonance frequency characteristics and transmits electric power wirelessly.
- the power receiving resonance coil has the same resonance frequency characteristic as that of the power transmission resonance coil, and receives the power wirelessly by generating a magnetic field resonance mode by tuning the resonance frequency.
- the relay resonance coil has the same resonance frequency characteristics as the power transmission resonance coil and the power reception resonance coil, and the resonance frequency is tuned between them to generate a magnetic field resonance mode, whereby the power from the power transmission resonance coil is received. Relay to the radio.
- the angle at which the magnetic lines of force exiting the power transmission resonance coil and directly passing through the power reception resonance coil intersect with the coil axis of the power reception resonance coil is defined as an intersection angle ⁇ .
- the angle at which the magnetic field lines coming out of the power transmission resonance coil or other relay resonance coil and passing through the relay resonance coil intersect with the coil axis of the relay resonance coil is defined as an intersection angle ⁇ 0.
- the angle at which the magnetic field lines coming out of the relay resonance coil and passing through the power reception resonance coil or other relay resonance coil intersect the coil axis of the power reception resonance coil or other relay resonance coil is defined as an intersection angle ⁇ 1.
- the relay resonance coil is arranged so that 0 ° ⁇ ⁇ 0 ⁇ ⁇ 90 ° and 0 ° ⁇ ⁇ 1 ⁇ ⁇ 90 °.
- the wireless power supply system of this embodiment includes a power transmission resonance coil 1, a power reception resonance coil 2, and a relay resonance coil 3 as basic components.
- the wireless power supply system includes, for example, an attitude control device 4 that controls the position and attitude of the power receiving resonance coil 2.
- the power transmission resonance coil 1 is a coil whose both ends are open.
- the power transmission resonance coil 1 is not connected to an electric circuit in order to increase the Q value.
- the Q value is an index representing the sharpness of resonance, and is determined by the pure resistance and radiation resistance of the coil. The smaller the value, the larger the Q value can be obtained.
- the power transmission resonance coil 1 has a capacitor with stray capacitance. Thereby, the power transmission resonance coil 1 becomes an LC resonance circuit.
- the resonance frequency f of the power transmission resonance coil 1 as the LC resonance circuit is obtained from the inductance: L and the capacitance of the capacitor: C by the following formula.
- the power transmission resonance coil 1 is supplied with electric power by electromagnetic induction from a power supply coil (not shown).
- the power supply coil is disposed at a short distance such that power can be supplied to the power transmission resonance coil 1 by electromagnetic induction.
- the power supply coil is connected to a power source (not shown) via an oscillation circuit.
- the oscillation circuit transmits AC power having a predetermined frequency according to the resonance frequency of the power transmission resonance coil 1 to the power supply coil.
- electromagnetic induction is mainly used without magnetic field resonance, and therefore the resonance frequency need not be considered. Therefore, regarding the power supply coil, it is not necessary to consider that the frequency of the oscillation circuit changes. Thereby, when using the power supply coil by electromagnetic induction, it becomes possible to improve the freedom degree of design of an oscillation circuit.
- the power transmission resonance coil 1 includes an air-core coil portion 10 and a capacitor 11 connected in series to the coil portion 10. Is included.
- the power transmission resonance coil 1 when the inductance of the coil unit 10 is L, the capacitance (stray capacitance) of the capacitor 11 is C, and the frequency of the AC power supplied from the oscillation circuit is f, the frequency f of the AC power is
- the resonance state is reached. This frequency f becomes the resonance frequency.
- energy is periodically exchanged from the electric field due to the voltage inside the capacitor 11 to the magnetic field in the free space due to the current flowing through the coil unit 10.
- a resonance coil (relay resonance coil 3 in this embodiment) having the same resonance frequency f is brought close to the resonance state of the power transmission resonance coil 1 in a posture corresponding to the conditions described later, the magnetic field from the power transmission resonance coil 1
- the resonant coil resonates.
- Such a resonance phenomenon caused by a magnetic field is referred to as a magnetic field resonance mode.
- the power of the power transmission resonance coil 1 is transmitted wirelessly to the adjacent resonance coils.
- the substantially same range is a frequency range in which power can be transmitted with higher efficiency than electromagnetic induction in a positional relationship where the coils are separated.
- the power receiving resonance coil 2 is a coil whose both ends are open. Similarly to the power transmission resonance coil 1, the power reception resonance coil 2 is not connected to an electric circuit in order to increase the Q value. Similarly to the power transmission resonance coil 1, the power reception resonance coil 2 is an LC resonance circuit.
- the power receiving resonance coil 2 takes out power by electromagnetic induction via a power take-out coil (not shown).
- the power receiving resonance coil 2 and the power extraction coil are arranged at a short distance so that electric power can be extracted by electromagnetic induction.
- the power extraction coil is connected to a load device that consumes power, for example, the attitude control device 4 or an electronic device or battery (not shown).
- An output circuit (not shown) for converting the extracted power into power consumed by the load is connected between the power extraction coil and the load.
- the output circuit is a circuit that converts a voltage when the load is an attitude control device or an electronic device. For example, a transformer or an AC-DC converter is applied as the output circuit.
- the output circuit is a circuit that converts alternating current into direct current when the load is a battery. For example, a rectifier circuit or a charging circuit that monitors the amount of charge is applied as the output circuit.
- the load can be operated by an alternating current such as a heater or a light bulb, the wiring connected to the load becomes the output circuit.
- the power receiving resonance coil 2 has the same configuration as the power transmission resonance coil 1 and includes a coil portion and a capacitor.
- the resonance frequency of the power reception resonance coil 2 matches the resonance frequency f of the power transmission resonance coil 1.
- a power receiving resonance coil 2 generates a magnetic field resonance mode by tuning a resonance frequency with a resonance coil (relay resonance coil 3 in this embodiment) close to the power reception resonance coil, and wirelessly receives power from the resonance coil. To do.
- the power received by the power receiving resonance coil 2 is supplied to the load device by wire via, for example, a rectifier circuit.
- the relay resonance coil 3 is arranged in a posture according to the conditions described later at a position where a magnetic field effectively acts between the power transmission resonance coil 1 and the power reception resonance coil 2.
- the relay resonance coil 3 is not connected to an external power supply or load device, and has a circuit configuration similar to that of the power transmission resonance coil 1 and the power reception resonance coil 2 and includes a coil portion and a capacitor.
- the resonance frequency of the relay resonance coil 3 also matches the resonance frequency f of the power transmission resonance coil 1 and the power reception resonance coil 2.
- Such a relay resonance coil 3 is configured to be in a magnetic field resonance mode by tuning the resonance frequency with two resonance coils (in this embodiment, the power transmission resonance coil 1 and the power reception resonance coil 2) close to each other in the posture described below. Produce.
- the relay resonance coil 3 wirelessly receives power from the power transmission side resonance coil and relays the power to the power reception side resonance coil so as to be wirelessly transmitted.
- the power transmission resonance coil 1 and the power reception resonance coil 2 are arranged on the same plane, power can be supplied wirelessly in the magnetic field resonance mode.
- the coil arrangement is not as diverse as the power supply technology using electromagnetic induction.
- the relay resonance coil 3 is provided in order to improve the decrease in energy transfer efficiency due to the attitude of the coil.
- the power transmission resonance coil 1 has a coil axis C1 that penetrates the center of the coil portion 10 vertically, and is fixedly arranged so that the coil axis C1 does not move.
- the line of magnetic force L1 coming out of the power transmission resonance coil 1 is more greatly curved away from the coil axis C1 than the line passing straight through the coil axis C1.
- the power receiving resonance coil 2 has a coil axis C2 that vertically penetrates the center of the coil part, and the attitude is controlled by the attitude control device 4 so that the direction of the coil axis C2 can be changed.
- the power receiving resonant coil 2 is stationary so that the coil axis C2 is parallel to the coil axis C1.
- the power receiving resonance coil 2 is stationary so that the coil axis C2 intersects the coil axis C1 perpendicularly.
- the relay resonance coil 3 has a coil axis C3 that vertically penetrates the center of the coil portion, and is fixedly arranged so that the coil axis C3 coincides with the coil axis C1 of the power transmission resonance coil 1.
- the line of magnetic force L3 coming out from the relay resonance coil 3 is also curved more greatly as the distance from the coil axis C3 is longer than that passing straight through the coil axis C3.
- the arrangement position and orientation of such a relay resonance coil 3 are set as follows.
- the angle at which the line of magnetic force L1 coming out of the power transmission resonance coil 1 and directly passing through the center of the power reception resonance coil 2 intersects the coil axis C2 of the power reception resonance coil 2 is defined as an intersection angle ⁇ .
- the angle at which the magnetic field line L1 coming out of the power transmission resonance coil 1 and passing through the center of the relay resonance coil 3 intersects the coil axis C3 of the relay resonance coil 3 is defined as an intersection angle ⁇ 0.
- the angle at which the magnetic field line L3 coming out of the relay resonance coil 3 and passing through the center of the power reception resonance coil 2 intersects the coil axis C2 of the power reception resonance coil 2 is defined as an intersection angle ⁇ 1.
- the relay resonance coil 3 and the power reception resonance coil 2 are provided between the power transmission resonance coil 1 and the relay resonance coil 3.
- the energy transfer efficiency by the magnetic field resonance mode is improved. This is because the magnetic field crossing the coil increases as the magnetic field action direction approaches the direction of the current flowing through each of the coils 1 to 3, and a larger current is more likely to flow, increasing the energy that causes magnetic field resonance. It is to do. That is, between the power transmission resonance coil 1 and the power reception resonance coil 2, a relatively strong magnetic field is generated on the power transmission side and the power reception side via the relay resonance coil 3 even when the energy transfer efficiency in the magnetic field resonance mode is low. A resonance mode can be generated. Thereby, the electric power transmitted from the power transmission resonance coil 1 is efficiently transmitted to the power reception resonance coil 2 via the relay resonance coil 3 by radio.
- the power transmission resonance coil and the power reception resonance coil are not only in a state where the coil axes are displaced in parallel with each other or in a state where they intersect perpendicularly, but for example, the crossing angle of the coil axes becomes an acute angle It may be in a crossed positional relationship or a twisted positional relationship.
- the relay resonance coil may be arranged so that the crossing angle of the magnetic field lines with respect to the coil axis is within the previously set range.
- the effectiveness of the relay resonance coil 3 was simulated as follows.
- the relay resonance coil 3 is arranged at an intermediate position between the power transmission resonance coil 1 and the power reception resonance coil 2 and arranged so that all the coil axes coincide with each other. A comparison was made with no placement.
- the amplitude initial response characteristics of the power transmission resonance coil 1, the power reception resonance coil 2, and the relay resonance coil 3 are obtained by solving simultaneous differential equations by the following complex analysis based on the coupled mode theory. Desired.
- “z” is the energy amplitude
- “ ⁇ ” is the natural angular frequency
- “ ⁇ ” is a coefficient related to the energy loss inherent to the object
- “ ⁇ ” is a coupling coefficient between the coils
- the subscript is each coil or Shown between coils.
- the amplitude initial response characteristics of the power transmission resonance coil 1 and the power reception resonance coil 2 can be obtained by solving simultaneous differential equations similar to the above.
- Equation 4 is a coefficient related to the amount of electric power extracted from the power receiving resonance coil 2 to a subsequent load or the like.
- a waveform as shown in FIG. 6B was obtained from Equation 5 above as the steady state characteristic of the amplitude.
- the amplitude of the power receiving resonance coil 2 is reduced and the magnetic field resonance mode is set as a steady characteristic when the relay resonance coil is not used. It is thought to weaken.
- the relay resonance coil 3 may be disposed at an appropriate position and posture. Thereby, a strong magnetic field resonance mode can be reliably generated through the relay resonance coil 3, and power can be efficiently transmitted from the power transmission resonance coil 1 to the power reception resonance coil 2.
- Embodiment 1 in which the wireless power supply system according to the present invention is applied to an electric door mirror of an automobile.
- the wireless power supply system supplies power wirelessly from the inside of the door panel DP of the automobile M to the electric door mirror D.
- the electric door mirror D is attached to be rotatable around the rotation axis S ⁇ b> 1 of the stage S, for example.
- the electric door mirror D is opened and closed by a posture control device 4 incorporated therein.
- the electric door mirror D is provided with a power receiving resonance coil 2, a mirror 100, and a mirror angle adjusting device 110 that adjusts the angle of the mirror 100.
- the relay resonance coil 3 is fixed to the stage S.
- a power transmission resonance coil 1 is provided inside the door panel DP of the automobile M near the electric door mirror D.
- the power transmission resonance coil 1 is connected to an in-vehicle battery (not shown) via an oscillation circuit, and transmits the energy of the in-vehicle battery as electric power.
- the power receiving resonance coil 2 is connected to the mirror angle adjusting device 110 through a power supply circuit.
- the mirror angle adjusting device 110 receives an instruction to adjust the mirror 100 from the vehicle body via, for example, a wireless communication unit (not shown), and operates using power supplied from the power receiving resonance coil 2 as a source.
- the door panel DP is a material that passes the magnetic lines of force.
- the magnetic force line L1 sent out from the power transmission resonance coil 1 passes through the door panel DP and crosses the relay resonance coil 3. Therefore, the electric door mirror D is improved in dustproofness and waterproofness without a cable being drawn into the interior.
- Magnetic field lines L3 sent out from the relay resonance coil 3 cross the power reception resonance coil 2 regardless of the attitude of the electric door mirror D, as shown in FIGS. 9 (a) and 9 (b).
- the relay resonance coil 3 improves not only the decrease of the magnetic flux density across the power reception resonance coil 2 but also the decrease due to the posture of the magnetic flux density across the power reception resonance coil 2.
- the direction of the coil axis of the power receiving resonance coil 2 and the relay resonance coil 3 is changed as the electric door mirror D is opened and closed. Even if the coil axis can be changed in this way, the power transmission resonance coil 1, the power reception resonance coil 2, and the relay resonance coil 3 have ranges in which the crossing angle of the magnetic field lines with respect to these coil axes is set in the above-described embodiment. It is arranged to satisfy. Therefore, regardless of whether the electric door mirror D is in the open state or the closed state, the driving power is efficiently transmitted to the mirror angle adjusting device 110 wirelessly, and the angle of the mirror 100 is determined based on this power. Can be adjusted. Further, the power receiving resonance coil 2 can supply power to the attitude control device 4 regardless of the attitude of the electric door mirror D.
- FIG. 9C shows a modification of the first embodiment.
- the power transmission resonance coil 1 of this modified example is provided not in the door panel but in a fixing portion F on the vehicle body side where the electric door mirror D is fixed via the stage S.
- the power transmission resonance coil 1 arranged at such a position can send lines of magnetic force to the relay resonance coil 3 regardless of the material of the door panel. Even when the power transmission resonance coil 1 is arranged in this manner, the power transmission resonance coil 1 and the relay resonance coil 3 can be partitioned.
- the magnetic field resonance mode is always maintained between the relay resonance coil 3 and the power reception resonance coil 2 even if the attitude of the electric door mirror D changes.
- the relay resonance coil 3 may be partially used. For example, you may arrange
- the relay resonance coil 3 When such an arrangement of the relay resonance coil 3 is adopted, in the other posture, it is preferable to arrange the relay resonance coil 3 at a position where the magnetic field resonance mode by the relay resonance coil 3 works efficiently.
- the magnetic field resonance mode works directly between the power transmission resonance coil 1 and the power reception resonance coil 2, and relay resonance occurs when the intermediate position is reached.
- the coil 3 may function.
- the relay resonance coil 3 when an optional vehicle exterior imaging device is retrofitted to the electric door mirror, the vehicle exterior imaging device and the power receiving resonance coil may be connected to supply power to the vehicle exterior imaging device wirelessly.
- FIG. 10 shows a second embodiment in which the wireless power supply system according to the present invention is applied to a plurality of notebook PCs 20 to 22 and a table 30 on which these are placed.
- the power transmission resonance coil 1 is incorporated in the table 30, and a plurality of notebook PCs 20 to 22 are placed on the upper surface of the table 30 around the power transmission resonance coil 1.
- the power transmission resonance coil 1 is connected to a power source (not shown) via an oscillation circuit.
- the notebook PCs 20 to 22 incorporate the power receiving resonance coil 2.
- One notebook PC 20 out of these notebook PCs 20 to 22 is placed immediately above the power transmission resonance coil 1.
- the relay resonance coil 3 of the notebook PC 20 has a range in which the crossing angle of the magnetic field lines with respect to the coil axes is set in the above-described embodiment with respect to the power reception resonance coils 2 of the notebook PCs 21 and 22 arranged on both sides.
- a power transmission resonance coil may be provided on the ceiling, floor, or wall of the room where these electronic devices are located.
- FIG. 11 shows a third embodiment in which the wireless power supply system according to the present invention is applied to an imaging device outside a vehicle.
- the outside-vehicle imaging devices 30 and 31 are installed, for example, at the front outside the vehicle body and the rear outside the vehicle body of the automobile M.
- a navigation device N capable of displaying images from the outside imaging devices 30 and 31 is installed inside the vehicle M.
- the on-vehicle imaging devices 30 and 31 and the navigation device N can transmit and receive video signals and control signals via wireless communication means (not shown).
- the navigation device N is provided with a power transmission resonance coil 1 so that electric power is supplied via an oscillation circuit (not shown).
- the navigation device N transmits power wirelessly from the power transmission resonance coil 1.
- the outside imaging devices 30 and 31 are provided with a power receiving resonance coil 2 so that electric power is supplied to an internal circuit via a power supply circuit (not shown).
- the imaging devices 30 and 31 outside the vehicle are driven using the power from the power receiving resonance coil 2 as a source.
- the relay resonance coils 3A to 3E are located between the power receiving resonance coil 2 and the power transmission resonance coil 1 of the front outside imaging device 30 and between the power reception resonance coil 2 and the power transmission resonance coil 1 of the rear outside imaging device 31. It is provided at the appropriate part of the car body.
- the power transmission resonance coil 1, the power reception resonance coil 2, and the relay resonance coils 3A to 3E are also arranged so that the crossing angle of the magnetic field lines with respect to these coil axes satisfies the range set in the above-described embodiment. As a result, even when the power transmission resonance coil 1 and the power reception resonance coil 2 are arranged at a relatively large distance, power can be efficiently transmitted wirelessly via the plurality of relay resonance coils 3A to 3E. .
- the resonance frequency of the coil involved in this is set to f1, while the other device is involved in this.
- the resonance frequency of the coil may be set to f2 different from the above. In this way, when the resonance frequency of the coil is variably controlled, for example, power can be supplied to each device, and wasteful power consumption can be suppressed.
- the present invention is not limited to the above embodiment.
- the number of turns of the resonant coil and the number of connected capacitors can be appropriately set according to the system specifications.
- the relay resonance coil may be supplementarily supplied with power.
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Abstract
Description
Claims (8)
- 共振周波数特性をもち、無線で電力を送出する送電共振コイルと、
上記送電共振コイルと同一の共振周波数特性をもち、共振周波数の同調によって磁場共鳴モードが生じることにより、無線で電力を収受する受電共振コイルと、
上記送電共振コイルおよび受電共振コイルと同一の共振周波数特性をもち、これらとの間で共振周波数が同調して磁場共鳴モードが生じることにより、上記送電共振コイルからの電力を上記受電共振コイルへと無線で中継する一または複数の中継共振コイルと、
を備えており、
上記送電共振コイルから出て上記受電共振コイルを直接通り抜ける磁力線が上記受電共振コイルのコイル軸と交差する角を交差角α、上記送電共振コイルあるいは他の中継共振コイルから出て上記中継共振コイルを通り抜ける磁力線がこの中継共振コイルのコイル軸と交差する角を交差角β0、上記中継共振コイルから出て上記受電共振コイルあるいは他の中継共振コイルを通り抜ける磁力線が、この受電共振コイルあるいは他の中継共振コイルのコイル軸と交差する角を交差角β1とした場合、
上記中継共振コイルは、0°≦β0<α≦90°、かつ、0°≦β1<α≦90°となるように配置される、無線電力供給システム。 - 上記送電共振コイルおよび上記受電共振コイルは、これらのコイル軸が互いに交差状または平行状あるいは捻れ状の位置関係をなすように配置される、請求項1に記載の無線電力供給システム。
- 上記送電共振コイルおよび上記受電共振コイルならびに上記中継共振コイルの少なくともいずれか一つを姿勢制御し、そのコイル軸の方向を変化させる姿勢制御装置を備えている、請求項2に記載に無線電力供給システム。
- 上記受電共振コイルおよび上記中継共振コイルは、上記姿勢制御装置によって動作する自動車の電動ドアミラーに設けられており、上記送電共振コイルは、上記自動車の車体適部に設けられている、請求項3に記載の無線電力供給システム。
- 上記受電共振コイルは、複数の電子機器に設けられており、上記送電共振コイルは、上記複数の電子機器を載置可能な卓、あるいはこれら複数の電子機器が所在する部屋の天井、床、もしくは壁に設けられている、請求項1に記載の無線電力供給システム。
- 上記複数の電子機器における少なくともいずれか一つの上記受電共振コイルは、上記中継共振コイルとして兼用される、請求項5に記載の無線電力供給システム。
- 上記送電共振コイルおよび上記中継共振コイルは、自動車の車体適部に設けられており、上記受電共振コイルは、上記自動車の車体外部に設置された車外撮像装置に設けられている、請求項1に記載の無線電力供給システム。
- 上記送電共振コイルおよび上記受電共振コイルならびに上記中継共振コイルには、コンデンサが含まれる、請求項1ないし7のいずれかに記載の無線電力供給システム。
Priority Applications (10)
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EP16184232.3A EP3115258B1 (en) | 2009-03-17 | 2009-03-17 | Wireless power supply system |
EP09841841.1A EP2410630B1 (en) | 2009-03-17 | 2009-03-17 | Wireless power supply system |
JP2011504644A JP5304885B2 (ja) | 2009-03-17 | 2009-03-17 | 無線電力供給システム |
KR1020117020930A KR101278399B1 (ko) | 2009-03-17 | 2009-03-17 | 무선 전력 공급 시스템 |
PCT/JP2009/055155 WO2010106636A1 (ja) | 2009-03-17 | 2009-03-17 | 無線電力供給システム |
KR1020137004274A KR101341258B1 (ko) | 2009-03-17 | 2009-03-17 | 무선 전력 공급 시스템 |
CN2009801580548A CN102349214A (zh) | 2009-03-17 | 2009-03-17 | 无线供电系统 |
US13/227,972 US9283894B2 (en) | 2009-03-17 | 2011-09-08 | Wireless power supply system |
JP2013134218A JP5660163B2 (ja) | 2009-03-17 | 2013-06-26 | 無線電力供給システム |
US15/041,638 US9685825B2 (en) | 2009-03-17 | 2016-02-11 | Wireless power supply system |
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PCT/JP2009/055155 WO2010106636A1 (ja) | 2009-03-17 | 2009-03-17 | 無線電力供給システム |
JP2013134218A JP5660163B2 (ja) | 2009-03-17 | 2013-06-26 | 無線電力供給システム |
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US13/227,972 Continuation US9283894B2 (en) | 2009-03-17 | 2011-09-08 | Wireless power supply system |
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EP (2) | EP3115258B1 (ja) |
JP (2) | JP5304885B2 (ja) |
KR (2) | KR101341258B1 (ja) |
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JPWO2010106636A1 (ja) | 2012-09-20 |
CN102349214A (zh) | 2012-02-08 |
KR20110114715A (ko) | 2011-10-19 |
US20160164347A1 (en) | 2016-06-09 |
JP5304885B2 (ja) | 2013-10-02 |
EP3115258A1 (en) | 2017-01-11 |
JP5660163B2 (ja) | 2015-01-28 |
EP2410630B1 (en) | 2016-09-28 |
EP2410630A4 (en) | 2014-03-05 |
KR101341258B1 (ko) | 2013-12-13 |
KR20130026508A (ko) | 2013-03-13 |
EP2410630A1 (en) | 2012-01-25 |
KR101278399B1 (ko) | 2013-06-24 |
US9283894B2 (en) | 2016-03-15 |
US9685825B2 (en) | 2017-06-20 |
JP2013243923A (ja) | 2013-12-05 |
US20110316334A1 (en) | 2011-12-29 |
EP3115258B1 (en) | 2018-08-22 |
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