WO2014010147A1 - Système d'alimentation sans contact - Google Patents

Système d'alimentation sans contact Download PDF

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Publication number
WO2014010147A1
WO2014010147A1 PCT/JP2013/001668 JP2013001668W WO2014010147A1 WO 2014010147 A1 WO2014010147 A1 WO 2014010147A1 JP 2013001668 W JP2013001668 W JP 2013001668W WO 2014010147 A1 WO2014010147 A1 WO 2014010147A1
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Prior art keywords
primary
magnetic core
side magnetic
power feeding
coil
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PCT/JP2013/001668
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English (en)
Japanese (ja)
Inventor
稔博 秋山
秀明 安倍
小笠原　潔
豊彦 辻本
弘士 小原
保 尾崎
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パナソニック 株式会社
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Publication of WO2014010147A1 publication Critical patent/WO2014010147A1/fr

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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
    • 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
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas

Definitions

  • the present invention relates to a non-contact power feeding system.
  • a non-contact power feeding system using an electromagnetic induction system includes a power feeding device including a plurality of primary coils arranged in parallel in one direction and a power receiving device including a secondary coil that moves on the plurality of primary coils.
  • a power feeding device including a plurality of primary coils arranged in parallel in one direction and a power receiving device including a secondary coil that moves on the plurality of primary coils.
  • secondary power is generated in the secondary coil by electromagnetic induction between the primary coil generating an alternating magnetic field and the secondary coil facing the primary coil.
  • Patent Document 1 since the primary coil and the secondary coil are both planar coils, the power feeding surface and the power receiving surface are widened. If the power supply surface and the power reception surface of the planar primary coil and the secondary coil are reduced, the coil cannot be wound to a desired number of turns. Therefore, a primary coil and a secondary coil are formed with a thin wire. However, if the primary coil and the secondary coil are formed of thin wires, the coil is likely to generate heat.
  • Patent Document 1 since a plurality of primary coils are arranged in a line with no gap, the number of primary coils is large, and a high-frequency inverter that generates a high-frequency current to be supplied to the primary coils Are required by the number of primary coils.
  • the present invention has been made to solve the above-described problems, and its object is to provide a non-contact power supply that can reduce the number of primary coils and, accordingly, reduce the number of high-frequency inverters and realize cost reduction. To provide a system.
  • a non-contact power feeding system includes a plurality of primary side magnetic cores arranged at regular intervals along an arrangement direction, and a plurality of primary side magnetic cores wound around the plurality of primary side magnetic cores, respectively.
  • a power feeding device including a primary coil and a moving body that moves in the arrangement direction are provided.
  • the moving body is provided with a power receiving device including a long secondary magnetic core extending in the arrangement direction and a secondary coil wound around the secondary magnetic core. .
  • the secondary magnetic core moves along the plurality of primary coils, and secondary power generated by the power receiving device is provided in the moving body.
  • the moving body is configured to be supplied to the electric device.
  • the plurality of primary side magnetic cores and the secondary side magnetic cores are arranged and formed so as to satisfy D ⁇ 2X1 and X2 ⁇ 2X1 + D, where X1 is each primary side in the arrangement direction
  • X2 represents the length of the said secondary side magnetic body core in the said arrangement direction
  • D represents the said space
  • the secondary magnetic core is preferably a C-type or I-type core.
  • the power supply device includes a plurality of high-frequency inverters that respectively supply a high-frequency current to the plurality of primary coils.
  • the plurality of primary coils and the secondary coils are preferably connected in series or in parallel with a resonance capacitor.
  • the moving body has a storage space for the electric device.
  • the movable body is movably supported by a rail, and the plurality of primary-side magnetic cores are provided on the rail, and the secondary side regardless of the position of the movable body with respect to the rail.
  • the power feeding device is provided in a duck in a room, the plurality of primary side magnetic cores are arranged side by side along the duck, the moving body is a sliding door, and the secondary side magnetic
  • the body core is preferably provided on the upper part of the sliding door so as to face at least one of the plurality of primary side magnetic cores when the sliding door is moved along the headquarters.
  • the number of primary coils can be reduced, and accordingly, the number of high-frequency inverters can be reduced, thereby realizing cost reduction.
  • the perspective view of the non-contact electric power feeding system in an embodiment.
  • (A)-(j) is a schematic diagram for demonstrating the coupling coefficient according to the position of the secondary coil with respect to a primary coil.
  • the non-contact power feeding system includes a plurality of primary-side magnetic cores 11 arranged at a constant interval D along the arrangement direction, and a plurality of primary-side magnetic cores.
  • 11 includes a power feeding device including a plurality of primary coils L1 wound around each of the first and second coils, and a moving body that moves in the arrangement direction.
  • the moving body includes a long secondary side that extends in the arrangement direction.
  • a power receiving device including a magnetic core 21 and a secondary coil L2 wound around the secondary magnetic core 21 is provided.
  • a plurality of primary side magnetic cores 11 and secondary side magnetic cores 21 are arranged and formed so as to satisfy D ⁇ 2X1 and X2 ⁇ 2X1 + D.
  • X1 represents the dimension of each primary-side magnetic core 11 in the arrangement direction
  • X2 represents the length of the secondary-side magnetic core 21 in the arrangement direction
  • D represents the interval between the primary-side magnetic cores 11. Represents. According to this configuration, regardless of the position of the moving body 1, the power receiving device 20 can sufficiently acquire the secondary power, and at the same time, the number of primary coils L1 can be reduced.
  • the moving body is the sliding door 1.
  • the sliding door 1 is arranged between the head 2 and the sill 3 of the room, slides in the groove formed in the head 2 and the sill 3, and the position shown by the solid line and the position shown by the two-dot chain line in FIG. Is slidably supported between the two.
  • Kamoi 2 is an example of a rail.
  • a power feeding device 10 is installed in the Kamoi 2, a power feeding device 10 is installed.
  • the power feeding apparatus 10 has a plurality of primary coils L1 wound around a plurality of primary side magnetic cores 11, respectively.
  • the primary coil L1 is arrange
  • the primary side magnetic core 11 is a so-called C-type core, and the primary coil L ⁇ b> 1 is wound around an intermediate portion 11 b of the C-type primary side magnetic core 11.
  • the primary coil L1 and the primary-side magnetic core 11 are arranged at equal intervals along the moving direction of the sliding door 1 indicated by an arrow in FIG.
  • the primary side magnetic core 11 is arranged so that the quadrangular tip surface 11 c faces the upper surface of the sliding door 1, and the line connecting the side portions 11 a is orthogonal to the moving direction of the sliding door 1.
  • the interval D between the primary side magnetic cores 11 is set to be not less than twice the dimension of the primary side magnetic core 11 in the moving direction of the sliding door 1, that is, the thickness X1 (D ⁇ 2X1).
  • the power feeding device 10 includes a plurality of high-frequency inverters 15 (see FIG. 4) connected to the primary coils L1 and supplying a high-frequency current to the corresponding primary coils.
  • the sliding door 1 is formed in a rectangular plate shape having a thickness of 40 mm made of, for example, wood, glass, plastic, or wall material.
  • a power receiving device 20 is installed in the sliding door 1.
  • the power receiving device 20 includes a long secondary magnetic core 21 and a secondary coil L2 wound around the secondary magnetic core 21.
  • the secondary side magnetic core 21 is elongated and extends in the moving direction of the sliding door 1.
  • the secondary magnetic core 21 is formed of the same material as that of the primary magnetic core 11 and is a C-shaped member having the same cross-sectional shape as that of the primary magnetic core 11. Is the core.
  • the length X2 of the secondary side magnetic core 21 is set to be larger than the dimension X1 of the primary side magnetic core 11.
  • the secondary-side magnetic core 21 is arranged on the upper part of the sliding door 1 fitted in the groove of the Kamoi 2 along the moving direction.
  • the secondary-side magnetic core 21 includes C-shaped side portions 21a and two rectangular end surfaces 21c extending in the movement direction between the side portions 21a. Both the tip surfaces 21c oppose the both tip surfaces 11c of the primary side magnetic core 11 respectively.
  • the secondary coil L2 is wound around the intermediate portion 21b of the secondary side magnetic core 21.
  • secondary power is generated in the secondary coil L2 by electromagnetic induction based on an alternating magnetic field generated in the primary side magnetic core 11.
  • X1 represents the dimension of each primary side magnetic body core 11 in the moving direction of the sliding door 1
  • D represents the space
  • X2 represents the secondary side magnetic body core. This represents a length of 21.
  • the primary-side magnetic core 11 and the secondary-side magnetic core 21 are arranged so that D ⁇ 2X1 and X2 ⁇ 2X1 + D.
  • the coupling coefficient K between the secondary coil L2 and the primary coil L1 facing each other at that time is 0.15 or more regardless of the moving position of the sliding door 1.
  • a coupling coefficient K of 0.15 or more is a secondary coil that reciprocates in an alternating magnetic field generated by the primary coil L1 based on a high-frequency current supplied to the primary coil L1 by the high-frequency inverter 15 of the power supply apparatus 10.
  • L2 is a coupling coefficient K that enables power transmission.
  • FIGS. 3A to 3J show an embodiment in which the coupling coefficient K is 0.15 or more.
  • each primary-side magnetic core 11 in the moving direction is 30 mm
  • the distance D between the primary-side magnetic cores 11 is 60 mm
  • the length X2 of the secondary-side magnetic core 21 is 120 mm.
  • the secondary-side magnetic core 21 was moved rightward from the position shown in FIG. 3A to the position shown in FIG. In the position shown in FIG. 3A, the secondary side magnetic core 21 faces the primary side magnetic core 11 located on the left side and the center. In the state shown in FIG. 3 (j), the secondary side magnetic core 21 faces the primary side magnetic core 11 located at the center and the right side.
  • the coupling coefficient K between the primary coil L1 and the secondary coil L2 was calculated at each position in FIGS. 3 (a) to 3 (j).
  • the coupling coefficient K is determined from the inductance Lo of the secondary coil L2 when the primary coil L1 is opened and the inductance Ls of the secondary coil L2 when the primary coil L1 is short-circuited according to the following equation. It calculated for every position.
  • the rate of change (%) of the coupling coefficient K is the reference coupling coefficient Ks, which is the coupling coefficient K when the secondary coil L2 is located in FIG. 3A, and the coupling coefficient Km at each position of the secondary coil L2. From this, it was calculated according to the following formula.
  • FIG. 3A shows a state in which the secondary magnetic core 21 faces the left and center primary magnetic cores 11. At this time, the left end of the secondary magnetic core 21 is the same as the left end of the left primary magnetic core 11 and the right end of the secondary magnetic core 21 is the same as the right end of the central primary magnetic core 11. I'm doing it. At this time, the coupling coefficient K is 0.196.
  • FIG. 3B shows a state in which the secondary side magnetic core 21 is arranged at a position shifted 10 mm to the right from the position shown in FIG. At this time, the coupling coefficient K is 0.185.
  • the rate of change (%) with respect to the coupling coefficient K is 5.6%.
  • FIG. 3 (c) shows a state in which the secondary side magnetic core 21 is arranged at a position shifted 20 mm to the right from the position shown in FIG. 3 (a). At this time, the coupling coefficient K is 0.169. The change rate (%) of the coupling coefficient K is 13.8%.
  • FIG. 3D shows a state in which the secondary side magnetic core 21 is arranged at a position shifted by 30 mm to the right from the position shown in FIG. At this time, the coupling coefficient K is 0.16.
  • the change rate (%) of the coupling coefficient K is 18.4%.
  • FIG. 3 (e) shows a state in which the secondary side magnetic core 21 is arranged at a position shifted by 40 mm to the right from the position shown in FIG. 3 (a). At this time, the coupling coefficient K is 0.157. The change rate (%) of the coupling coefficient K is 19.9%.
  • FIG. 3 (f) shows a state in which the secondary side magnetic core 21 is arranged at a position shifted by 50 mm to the right from the position shown in FIG. 3 (a). At this time, the coupling coefficient K is 0.157. The change rate (%) of the coupling coefficient K is 19.9%.
  • FIG. 3G shows a state in which the secondary side magnetic core 21 is arranged at a position shifted 60 mm to the right from the position shown in FIG. At this time, the coupling coefficient K is 0.16.
  • the change rate (%) of the coupling coefficient K is 18.4%.
  • FIG. 3 (h) shows a state in which the secondary side magnetic core 21 is arranged at a position displaced by 70 mm to the right from the position shown in FIG. 3 (a). At this time, the coupling coefficient K is 0.174. The rate of change (%) of the coupling coefficient K is 11.2%.
  • FIG. 3 (i) shows a state in which the secondary side magnetic core 21 is arranged at a position shifted 80 mm to the right from the position shown in FIG. 3 (a). At this time, the coupling coefficient K is 0.187. The change rate (%) of the coupling coefficient K is 4.6%.
  • FIG. 3 (j) shows a state in which the secondary side magnetic core 21 is disposed at a position shifted 90 mm to the right from the position shown in FIG. 3 (a). That is, the left end of the secondary side magnetic core 21 coincides with the left end of the central primary side magnetic core 11 and the right end of the secondary side magnetic core 21 coincides with the right end of the right side primary magnetic core 11. .
  • the coupling coefficient K is 0.196.
  • the change rate (%) of the coupling coefficient K is 0.0%.
  • the coupling coefficient K between the secondary coil L2 and the primary coil L1 was 0.15 or more regardless of the position of the secondary side magnetic core 21, that is, the position of the sliding door 1. Therefore, regardless of the position of the sliding door 1, the secondary coil L2 can receive the secondary power in the alternating magnetic field generated by the primary coil L1.
  • the change rate of the coupling coefficient K is less than 20% within the movement range of FIGS. 3A to 3J, the fluctuation of the secondary power received by the secondary coil L2 is small.
  • a storage space 1a in which the electric device E can be installed is formed.
  • two upper and lower storage spaces 1 a are provided in the sliding door 1.
  • an electric device E such as a flat-screen TV and a fan is installed.
  • various electric devices E such as a digital photo frame, a lighting device including an LED and an organic EL, and a portable terminal can be installed in the storage space 1a.
  • the electric device E installed in the storage space 1a is driven or charged by the secondary power received by the secondary coil L2 of the power receiving device 20 from the power feeding device 10.
  • the electrical configuration of the power feeding device 10 and the power receiving device 20 will be described.
  • the power feeding device 10 includes a high-frequency inverter 15 provided for each primary coil L1.
  • Each high frequency inverter 15 converts electric power from the commercial power source G into a high frequency current and supplies the high frequency current to the corresponding primary coil L1.
  • FIG. 5 shows an electric circuit of the high-frequency inverter 15.
  • the high-frequency inverter 15 is an inverter that rectifies the commercial power source G by the full-wave rectifier circuit 16 and excites the rectified DC voltage Vd through the primary coil L1 using the rectified DC voltage Vd as a drive source.
  • the high-frequency inverter 15 of this embodiment is a self-excited single-voltage resonant inverter.
  • the high-frequency inverter 15 has a primary side smoothing capacitor Cs1 connected between the plus terminal P1 and the minus terminal P2 of the full-wave rectifier circuit 16, and smoothes the DC voltage Vd from the full-wave rectifier circuit 16.
  • the high-frequency inverter 15 has a series circuit in which a first resistor R1 and a first charge / discharge capacitor C1 are connected in series, and the series circuit is connected in parallel to the primary-side smoothing capacitor Cs1.
  • the DC voltage Vd from the full-wave rectifier circuit 16 When the DC voltage Vd from the full-wave rectifier circuit 16 is input, the DC voltage Vd is smoothed by the primary side smoothing capacitor Cs1. The smoothed DC voltage Vd is charged to the first charge / discharge capacitor C1 via the first resistor R1.
  • the high frequency inverter 15 has a primary side resonance capacitor Cr1 connected in parallel with the primary coil L1.
  • the primary side resonance capacitor Cr1 forms an LC resonance circuit with the primary coil L1.
  • the plus terminal side of the parallel circuit of the primary coil L1 and the primary side resonance capacitor Cr1 is connected to the plus terminal P1 of the full-wave rectifier circuit 16. Further, on the negative terminal side of the parallel circuit of the primary coil L1 and the primary side resonance capacitor Cr1, a parallel circuit in which a diode D1 and a second resistor R2 are connected in parallel is connected in series.
  • the diode D1 includes an anode terminal connected to the primary coil L1 and a cathode terminal connected to the drain terminal of an N-channel MOS transistor (referred to as a MOS transistor) Q1.
  • MOS transistor N-channel MOS transistor
  • a diode D2 is connected between the source terminal and the drain terminal of the MOS transistor Q1.
  • the source terminal of the MOS transistor Q1 is connected to the negative terminal P2 of the full-wave rectifier circuit 16 through the third resistor R3.
  • a series circuit in which a feedback coil Lx and a fourth resistor R4 are connected in series is connected between the gate terminal of the MOS transistor Q1 and a connection point between the first resistor R1 and the first charge / discharge capacitor C1. .
  • the feedback coil Lx is a coil that forms a resonant transformer with the primary coil L1.
  • the MOS transistor Q1 When the charging voltage of the first charge / discharge capacitor C1 is boosted to the turn-on threshold voltage of the MOS transistor Q1, the MOS transistor Q1 is turned on. When a positive electromotive force is induced on the fourth resistor R4 side of the feedback coil Lx, the MOS transistor Q1 is turned on. The primary coil L1 is energized when the MOS transistor Q1 is turned on.
  • the gate terminal of the MOS transistor Q1 is connected to the negative terminal P2 of the full-wave rectifier circuit 16 through the bipolar transistor Q2. More specifically, the collector terminal of the bipolar transistor Q2 is connected to the gate terminal of the MOS transistor Q1, and the emitter terminal of the bipolar transistor Q2 is connected to the minus terminal P2 of the full-wave rectifier circuit 16.
  • the base terminal of the bipolar transistor Q2 is connected to the connection point between the source terminal of the MOS transistor Q1 and the third resistor R3 via the fifth resistor R5.
  • the base terminal of the bipolar transistor Q2 is connected to the minus terminal P2 of the full-wave rectifier circuit 16 through the second charge / discharge capacitor C2.
  • the bipolar transistor Q2 When the MOS transistor Q1 is turned on and the primary coil L1 is energized and the charging voltage of the second charge / discharge capacitor C2 is boosted to the turn-on threshold voltage of the bipolar transistor Q2, the bipolar transistor Q2 is turned on. Based on the turning on of the bipolar transistor Q2, the gate-source voltage of the MOS transistor Q1 falls below the turn-on threshold voltage, and the MOS transistor Q1 is turned off.
  • the DC voltage Vd is smoothed by the primary side smoothing capacitor Cs1 to charge the first charging / discharging capacitor C1 and the primary coil L1 and the primary coil. This is applied to a resonance circuit comprising a side resonance capacitor Cr1.
  • the charging voltage of the first charge / discharge capacitor C1 is applied to the gate terminal of the MOS transistor Q1 via the feedback coil Lx and the fourth resistor R4.
  • the MOS transistor Q1 is turned on.
  • a current flows through the primary coil L1.
  • the excitation energy of the primary coil L1 starts to move to the primary resonance capacitor Cr1, and resonance (oscillation) starts, and a resonance voltage is generated in the resonance circuit. That is, the excitation energy of the primary coil L1 moves to the primary side resonance capacitor Cr1, and as it moves, the voltage at the connection point N between the primary coil L1 and the diode D1 increases in a sine wave form. The voltage at the connection point N becomes maximum when the excitation energy from the primary coil L1 to the primary side resonance capacitor Cr1 is completed.
  • the primary coil L1 When the voltage fluctuation of the voltage at the connection point N occurs, the primary coil L1 is excited in reverse and a reverse electromotive force is induced in the feedback coil Lx. As a result, a reverse voltage is applied from the feedback coil Lx, and the gate voltage of the MOS transistor Q1 falls in a sine wave shape.
  • the transfer of the excitation energy from the primary coil L1 to the primary side resonance capacitor Cr1 is completed, the moved energy starts to return from the primary side resonance capacitor Cr1 to the primary coil L1, and as it returns, the connection point N The voltage drops in a sine wave.
  • the primary coil L1 When the voltage fluctuation of the voltage at the connection point N occurs, the primary coil L1 is excited positively and a positive electromotive force is induced in the feedback coil Lx. As a result, a positive voltage from the feedback coil Lx is applied, and the gate voltage of the MOS transistor Q1 rises in a sine wave shape.
  • the MOS transistor Q1 When the gate voltage of the MOS transistor Q1 reaches the turn-on threshold, the MOS transistor Q1 is turned on.
  • the MOS transistor Q1 When the MOS transistor Q1 is turned on, a drain current flows, the second charge / discharge capacitor C2 is charged, and the base voltage of the bipolar transistor Q2 increases.
  • the bipolar transistor Q2 reaches its turn-on threshold, the bipolar transistor Q2 is turned on and the MOS transistor Q1 is turned off.
  • the MOS transistor Q1 is turned off, the excitation energy of the primary coil L1 starts to move again to the primary side resonance capacitor Cr1, and the primary coil L1 is reversely excited to induce a reverse electromotive force in the feedback coil Lx. Is done.
  • the moved energy returns from the primary side resonance capacitor Cr1 to the primary coil L1.
  • the voltage at the connection point N falls in a sine wave shape
  • the primary coil L1 is excited positively, and a positive electromotive force is induced in the feedback coil Lx.
  • the inverter operation is repeated in the same manner.
  • the primary coil L1 is excited and the alternating magnetic field is coupled to the secondary coil L2 of the power receiving device 20 that is coupled to the primary coil L1 in the state of the coupling coefficient K described above. Radiates towards.
  • a secondary side resonance capacitor Cr2 for resonance is connected in parallel to the secondary coil L2 wound around the secondary side magnetic core 21.
  • the secondary coil L2 generates secondary power in an alternating magnetic field radiated from each primary coil L1 of the power feeding apparatus 10 coupled in the state of the coupling coefficient K described above.
  • the secondary coil L ⁇ b> 2 is connected to the full wave rectifier circuit 25.
  • the full-wave rectifier circuit 25 rectifies the secondary power received by the secondary coil L2, and outputs the rectified DC voltage to the voltage stabilization circuit 26.
  • the voltage stabilizing circuit 26 converts the voltage from the full-wave rectifier circuit 25 into the same voltage as the commercial voltage of the commercial power supply frequency, and supplies the converted voltage to the electric equipment E installed in the storage space 1a of the sliding door 1. .
  • the electric device E is driven based on the converted voltage from the voltage stabilizing circuit 26.
  • a high frequency current is supplied from the corresponding high frequency inverter 15 to each primary coil L1.
  • Each primary coil L1 generates an alternating magnetic field.
  • the sliding door 1 is moved along the Kamoi 2. Whatever position the sliding door 1 is moved to, the coupling coefficient K between the secondary coil L2 and the primary coil L1 is 0.15 or more. Secondary power is generated in the secondary coil L2 by the alternating magnetic field of the primary coil L1.
  • Secondary power generated in the secondary coil L2 is rectified by the full-wave rectifier circuit 25 of the power receiving device 20 and supplied to the electric device E via the voltage stabilization circuit 26.
  • the dimension X1 of each primary magnetic core 11 in the moving direction, the distance D between the primary magnetic cores 11, and the length X2 of the secondary magnetic core 21 are as follows. , D ⁇ 2X1 and X2 ⁇ 2X1 + D, the primary side magnetic core 11 and the secondary side magnetic core 21 are arranged.
  • the power receiving device 20 can sufficiently obtain the secondary power regardless of the position of the sliding door 1.
  • the primary coils L1 are arranged at a constant interval D, the number of primary coils L1 can be reduced. As the number of primary coils L1 decreases, the number of high-frequency inverters 15 also decreases. As a result, as compared with the conventional configuration in which the primary coil is spread without gaps in the moving direction of the sliding door 1, it is possible to realize downsizing, saving construction, and low cost.
  • the primary coil L1 is arranged at a constant interval D, it is difficult for the two primary coils L1 to hit, and it is not necessary to make the wire of the primary coil L1 thinner, and it is necessary to consider the heat generation of the wire. Disappears.
  • the non-contact power feeding system of the above embodiment includes resonant capacitors Cr1 and Cr2 connected in parallel to the primary coil L1 and the secondary coil L2, respectively. For this reason, the high frequency voltage supplied to the primary coil L1 can be boosted, and the output voltage of the secondary coil L2 can be boosted or made constant. Further, even when the sliding door 1 moves to a place where the coupling coefficient K between the primary coil L1 and the secondary coil L2 is relatively small, power can be transmitted with high efficiency.
  • the high frequency inverter 15 is a voltage resonance type inverter, the voltage between the terminals of the primary coil L1 can be increased.
  • the high-frequency inverter 15 when the high-frequency inverter 15 is a self-excited, one-stone (MOS transistor Q1) voltage resonance type, it can oscillate with a small number of components, and a small and low-cost non-contact power feeding system can be realized.
  • MOS transistor Q1 MOS transistor Q1
  • the primary coil L1 is wound around the intermediate portion 11b of the primary side magnetic core 11, but may be wound around both side portions 11a, and wound around both side portions 11a instead of the intermediate portion 11b. You may turn.
  • the secondary coil L2 is wound around the intermediate portion 21b of the secondary-side magnetic core 21, but may be wound around both side portions 21a, or may be wound around both side portions 21a instead of the intermediate portion 21b. Also good.
  • the secondary magnetic core 21 is a C-type core. As shown in FIG. 6, an I-type secondary magnetic core 31 may be used.
  • the secondary coil L ⁇ b> 2 is wound around the intermediate part of the secondary side magnetic core 31.
  • the primary side resonance capacitor Cr1 is connected in parallel to the primary coil L1, but may be connected in series to the primary coil L1.
  • the secondary side resonance capacitor Cr2 is connected in parallel to the secondary coil L2, but may be connected in series to the secondary coil L2.
  • the high-frequency inverter 15 is not limited to a one-stone voltage resonance type inverter, but may be a half-bridge type high-frequency inverter or a full-bridge type high-frequency inverter.
  • a metal foreign object detection function an authentication function, a magnetic field or electric field shield, a heat dissipation mechanism for heat dissipation of a circuit, a noise countermeasure circuit, an energy saving standby by intermittent coil excitation, etc. are omitted.
  • these functions may be incorporated.
  • the moving body is not limited to the sliding door 1.
  • the moving body may be a reciprocating object such as a window glass frame, a shoji screen, a bran, a partition wall, and a sliding door of a fixture.
  • the number of secondary coils L2 provided on the moving body is not limited to one, and two or more secondary coils L2 may be provided on the moving body as long as the above conditions are satisfied.
  • the mobile body is not limited to an indoor mobile body, and may be an outdoor mobile body.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

Un dispositif d'alimentation appartenant au système d'alimentation sans contact de l'invention contient une pluralité de noyaux de corps magnétiques latéraux primaires (11) disposée à intervalle fixe suivant une direction d'alignement, et une pluralité de bobines primaires (L1). Un dispositif de réception électrique (20) qui contient un noyau de corps magnétique latéral secondaire (21) de forme allongée s'étendant dans ladite direction d'alignement, et une bobine secondaire (L2), est agencé sur un corps de déplacement (1) qui se déplace dans ladite direction d'alignement. Lesdits noyaux de corps magnétiques latéraux primaires (11) et ledit noyau de corps magnétique latéral secondaire (21) sont disposés de manière à satisfaire D≧2X1 et X2≧2X1+D. X1 représente la dimension des noyaux de corps magnétiques latéraux primaires (11) dans ladite direction d'alignement ; X2 représente la longueur du noyau de corps magnétique latéral secondaire (21) dans ladite direction d'alignement ; et D représente ledit intervalle des noyaux de corps magnétiques latéraux primaires (11).
PCT/JP2013/001668 2012-07-09 2013-03-13 Système d'alimentation sans contact WO2014010147A1 (fr)

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CN117652076A (zh) * 2021-07-21 2024-03-05 三菱电机株式会社 无线供电系统

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