WO2009142053A1 - 電子機器、電子回路基板の接続方法 - Google Patents
電子機器、電子回路基板の接続方法 Download PDFInfo
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- WO2009142053A1 WO2009142053A1 PCT/JP2009/054711 JP2009054711W WO2009142053A1 WO 2009142053 A1 WO2009142053 A1 WO 2009142053A1 JP 2009054711 W JP2009054711 W JP 2009054711W WO 2009142053 A1 WO2009142053 A1 WO 2009142053A1
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- circuit board
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Classifications
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- H04B5/79—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
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- H01—ELECTRIC ELEMENTS
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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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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Definitions
- the present invention relates to an electronic device such as a home appliance and a method for connecting an electronic circuit board constituting the electronic device.
- the refrigerator main body 1 is provided with a high-frequency generating circuit 9 and a power feeding circuit 10 including a first coil 4 connected thereto, and the door 2 is electromagnetically coupled with the first coil 4.
- the power receiving circuit 11 including the second coil 5 is provided, and the second coil 5 is connected to the information display device 3.
- the refrigerator body 1 has means for placing information on the output of the high-frequency generation circuit 9, and the door 2 has means for detecting the information from the voltage induced in the second coil 5. Yes. Further, the door 2 includes means for rectifying the alternating current induced in the second coil 5 to serve as a direct current power source for the information input / output unit 3. Is proposed (Patent Document 1).
- a mobile communication terminal 1 such as a mobile phone includes an upper housing 3 having an electronic device 10 therein, and an inner surface of the upper housing 3 (the inner surface 8a of the cover 8).
- a sheet-like flexible substrate 17 having a non-contact coil antenna for IC card interface and a non-contact coil antenna for reader / writer is attached to the non-contact coil antenna for IC card interface,
- a sheet-like soft magnetic wave absorber 2 covering the non-contact coil antenna for the reader / writer is attached.
- a signal transmission method “a signal transmission method, a signal transmission device, and a signal transmission device that perform signal transmission easily with a small number of signal lines, and a data signal having a bit number N and a time slot number N + ⁇ is timed with a bit number N + ⁇ .
- Vertical-horizontal conversion to a data signal with the number of slots N creates an idle time ⁇ , inserts a control signal into the idle time ⁇ , converts the parallel signal including the data signal and the control signal into a serial signal, and transmits it To do.
- the non-contact type coil antenna for IC card interface and the non-contact coil antenna for reader / writer can be integrated to reduce the size and thickness of the coil antenna.
- the technique described in this document constitutes two types of coil antennas on the flexible base material 17, and does not connect the electronic circuit boards without wires.
- the present invention has been made in order to solve the above-described problems, and performs power supply and information communication between electronic circuit boards in an electronic device in a non-wired manner, and miniaturization of these realizing means. Objective.
- An electronic apparatus includes a first electronic circuit board, a second electronic circuit board, a first coil connected to the first electronic circuit board, and a second coil connected to the second electronic circuit board. And electrically connecting the first electronic circuit board and the second electronic circuit board by transmitting electric power from the first coil to the second coil by electromagnetic induction.
- the electronic apparatus it is possible to connect the first electronic circuit board and the second electronic circuit board without wires by transmitting electric power from the first coil to the second coil by electromagnetic induction. .
- the reliability of the connecting portion, deterioration with age and environmental degradation resistance, and ease of handling are improved.
- the connection portion between the first electronic circuit board and the second electronic circuit board can be reduced in size and thickness, and an electronic device equipped with these can be reduced in size.
- FIG. 1 is a configuration diagram of an electronic device 1 according to Embodiment 1.
- FIG. 3 is a configuration diagram of a coil 3.
- FIG. FIG. 6 is a diagram illustrating another configuration example of the coil 3. It is a figure which shows the example of arrangement
- FIG. 6 is a configuration diagram of an electronic device 1 according to a second embodiment. It is a figure which shows the example of arrangement
- FIG. 10 is a configuration diagram of an electronic device 1 according to a fifth embodiment.
- FIG. 10 is a configuration diagram of an electronic device 1 according to a sixth embodiment.
- FIG. 10 is a configuration diagram of an electronic device 1 according to a seventh embodiment.
- FIG. 10 is a diagram illustrating a configuration example of a primary power supply circuit 8 and a secondary power supply circuit 12 according to an eighth embodiment.
- FIG. 10 is a diagram illustrating a configuration example of a primary side communication circuit 7 and a secondary side communication circuit 11 according to an eighth embodiment. It is a figure which shows the structural example of the primary side signal synthetic
- FIG. 5 is a sequence diagram for explaining a communication operation between the first electronic circuit board 2 and the second electronic circuit board 4.
- FIG. 1 is a configuration diagram of an electronic apparatus 1 according to Embodiment 1 of the present invention.
- an electronic device 1 is composed of a plurality of electronic circuit boards, and in FIG.
- the first electronic circuit board 2 is an electronic circuit board for realizing the main function of the electronic device 1
- the second electronic circuit board 4 is an electronic circuit board for realizing the auxiliary function of the electronic device 1.
- a first coil 3 a is connected to the first electronic circuit board 2, and a second coil 3 b is connected to the second electronic circuit board 4.
- the first coil 3a and the second coil 3b are collectively referred to as a coil 3.
- the first electronic circuit board 2 and the second electronic circuit board 4 are not connected by wire, but are electrically connected by electromagnetic induction coupling between the first coil 3a and the second coil 3b. Therefore, power supply from the first electronic circuit board 2 to the second electronic circuit board 4 and transmission / reception of signals between the first electronic circuit board 2 and the second electronic circuit board 4 are performed by electromagnetic induction in the first coil. 3a and the second coil 3b.
- the first electronic circuit board 2 is an electronic circuit board for realizing the main function of the electronic device 1, and includes a main function unit 5 and a primary-side non-contact power feeding / communication unit 6.
- the main function unit 5 realizes the main function of the electronic device 1.
- the primary-side non-contact power supply / communication unit 6 is connected to the main function unit 5 and the first coil 3a, and supplies power to the second electronic circuit board 4 and transmits / receives communication signals to / from the second electronic circuit board 4.
- the main function unit 5 and the primary-side non-contact power feeding / communication unit 6 are connected by a main function unit output signal line 13, a main function unit input signal line 14, and a main function unit power output 15.
- the primary-side non-contact power supply / communication unit 6 includes a primary-side communication circuit 7 and a primary-side power supply circuit 8.
- the primary-side communication circuit 7 transmits and receives communication signals transmitted and received between the main function unit 5 and the auxiliary function unit 9 via the first coil 3a and the second coil 3b. Modulation / demodulation processing is performed on the current of the first coil 3a in accordance with a signal transmitted via the main function unit input signal line.
- the primary side power supply circuit 8 performs power supply processing for supplying power from the first electronic circuit board 2 to the second electronic circuit board 4, and controls the current of the first coil 3a.
- Examples of the main function output signal line 13 include a main function serial output signal line 13s that outputs a serial signal and a main function parallel output signal line 13p that outputs a parallel signal.
- Examples of the main function input line 14 include a main function serial input signal line 14s for inputting a serial signal and a main function parallel input signal line 14p for inputting a parallel signal.
- the main function output signal line 13 and the main function input signal line 14 may be analog signal lines instead of digital signal lines such as serial signals and parallel signals.
- the second electronic circuit board 4 is an electronic circuit board for realizing an auxiliary function of the electronic device 1, and includes an auxiliary function unit 9 and a secondary-side non-contact power feeding / communication unit 10.
- the auxiliary function unit 9 realizes an auxiliary function of the electronic device 1.
- the secondary-side non-contact power supply / communication unit 10 is connected to the auxiliary function unit 9 and the second coil 3b, and supplies the power supplied from the first electronic circuit board 2 to the second electronic circuit board 4 as a power source, And a function for transmitting and receiving communication signals to and from the first electronic circuit board 2.
- the auxiliary function unit 9 and the secondary side non-contact power supply / communication unit 10 are connected by an auxiliary function unit input signal line 16, an auxiliary function unit output signal line 17, and an auxiliary function unit power input 18.
- the secondary-side non-contact power feeding / communication unit 10 includes a secondary-side communication circuit 11 and a secondary-side power supply circuit 12. Since the secondary side communication circuit 11 transmits and receives communication signals transmitted and received between the main function unit 5 and the auxiliary function unit 9 via the first coil 3a and the second coil 3b, the auxiliary function unit input signal line 16 Further, modulation / demodulation processing is performed on the current of the second coil 3b in accordance with a signal transmitted via the auxiliary function unit output signal line 17.
- the secondary power supply circuit 12 receives power supplied from the first electronic circuit board 2 and supplies it as power for the second electronic circuit board 4.
- the auxiliary function input signal line 16 and the auxiliary function output signal line 17 may be analog signal lines instead of digital signal lines such as serial signals and parallel signals.
- FIG. 2 is a configuration diagram of the coil 3.
- the example comprised as a flexible substrate coil by the multilayer substrate of 2 layers was shown.
- the number of coil turns is 20 turns, 10 turns of the front surface of the two layers and 10 turns of the back surface.
- the coil 3 is a coil composed of a flexible substrate 21 and a flexible substrate composed of a circuit pattern 22 made of copper foil or the like fixed on the flexible substrate 21.
- the coil 3 has a coil portion 23 and a connection portion 24.
- the circuit pattern 22 includes a circuit pattern 22a on the front surface and a circuit pattern 22b on the back surface.
- the circuit pattern 22a and the circuit pattern 22b are connected by a through hole 26.
- FIG. 3 is a diagram showing another configuration example of the coil 3. Here, an example of a 10-turn coil having two layers of 5 turns on the front surface and 5 turns on the back surface is shown.
- the coil inductance can be increased as the area of the area without the coil pattern at the center of the coil surface increases.
- the area of the coil surface central portion without the coil pattern is larger, a decrease in performance can be suppressed with respect to deviation from the center position when the coils are opposed to each other.
- FIG. 4 is a diagram illustrating an arrangement example of the first electronic circuit board 2 and the second electronic circuit board 4.
- the first coil 3a and the second coil 3b are arranged to face each other. At this time, the coils are arranged in a state where the gap 30 between the coils is spaced.
- the inter-coil gap 30 varies depending on the attachment state of the first electronic circuit board 2 and the second electronic circuit board 4. For example, when the first electronic circuit board 2 and the second electronic circuit board 4 are covered with a resin case or the like, a gap corresponding to the thickness of the resin case is generated. When a resin case or the like is not required, the first coil 3a and the second coil 3b are arranged in a substantially close contact state.
- the coil 3 is sandwiched between magnetic bodies 31.
- the magnetic body 31 is attached to the surface opposite to the facing surface between the coils of each of the first coil 3a and the second coil 3b.
- the magnetic body 31 a plate-like material made of a material such as iron oxide, chromium oxide, cobalt, or ferrite, or a material formed in a sheet shape by mixing with a resin can be used. If the characteristics of the flexible substrate coil are used effectively, a sheet-like one is desirable.
- the size of the magnetic body 31 is preferably larger than the coil winding pattern portion that passes through the outermost periphery of the flexible substrate coil in order to promote the concentration of magnetic flux generated from the coil by the magnetic body 31 and reduce the leakage magnetic flux.
- the thickness of the magnetic body 31 it is desirable to set it as the thickness which can afford a magnetic flux saturation of the magnetic flux generated from the coil to be used. In order to take advantage of the thinness of the flexible substrate coil, the thickness is preferably 0.5 m or less.
- the primary-side power supply circuit 8 of the primary-side non-contact power feeding / communication unit 6 receives power from the connected main function unit 5 and controls the current flowing through the first coil 3a. Thus, electric power is supplied to the second electronic circuit board 4.
- a current flows through the first coil 3a, a current due to electromagnetic induction is generated in the second coil 3b.
- the current generated in the second coil 3b is rectified and converted into DC power to a predetermined voltage.
- the power is supplied to the second electronic circuit board 4 as the power source of the second electronic circuit board 4.
- the auxiliary function unit 9 and the secondary non-contact power feeding / communication unit 10 of the second electronic circuit board 4 operate.
- the current of the communication signal is superimposed on the current for power supply.
- means using a frequency different from the power supply current, means for changing the amplitude of the power supply current, and the like can be used.
- the secondary communication circuit 11 of the secondary side non-contact power feeding / communication unit 10 of the second electronic circuit board 4 extracts and demodulates the communication signal component from the current flowing through the second coil 3b, and performs the first electronic circuit.
- the received information is passed to the auxiliary function unit 9 as received information from the main function unit 5 of the substrate 2.
- the auxiliary function unit 9 of the second electronic circuit board 4 transmits information to the main function unit 5 of the first electronic circuit board 2, the secondary side of the secondary-side non-contact power feeding / communication unit 10
- the communication circuit 11 modulates the transmission information received from the auxiliary function unit 9 as a communication signal, and controls the current flowing through the second coil 3b.
- a current flows through the second coil 3b, a current due to electromagnetic induction is generated in the first coil 3a.
- a household electrical appliance or a wall-mounted remote controller (wired) of an air conditioner can be cited.
- a specific operation will be described by taking a wall remote controller for an air conditioner as an example.
- the remote controller of the air conditioner is connected to the indoor unit of the air conditioner and operates the air conditioner. This function corresponds to the main function unit 5 of the remote controller.
- the remote control has a function of inputting / outputting information managed by the air conditioner to / from the remote control as an auxiliary function.
- the auxiliary function input / output from / to the outside of the remote controller is handled by the auxiliary function unit 9 on the second electronic circuit board 4.
- auxiliary function of the auxiliary function unit 9 in this remote control example there is a connection function to a LAN (Local Area Network) or a USB (Universal Serial Bus) device.
- a LAN interface board and a USB interface board are prepared as the second electronic circuit board 4 and can be exchanged so that the auxiliary function can be switched as necessary.
- the configuration shown in FIG. 1 makes it possible to connect the first electronic circuit board 2 (air conditioner remote control main function) and the second electronic circuit board 4 (each interface function) without a contact connector, and the interface can be easily replaced. It becomes.
- auxiliary function unit 9 As a specific example of the function of the auxiliary function unit 9, a function of writing information such as an air conditioner operation log and maintenance information to a USB memory connected to a USB interface provided on a remote controller of the air conditioner can be considered.
- the USB interface allows the user to touch a metal part such as a contact with a finger or the like from the standard terminal shape. In this case, the insulation problem described below occurs.
- the air conditioner is generally connected to an AC power source such as 100V or 200V, and a stepped-down DC voltage is supplied to the remote controller as a power source.
- an AC power source such as 100V or 200V
- a stepped-down DC voltage is supplied to the remote controller as a power source.
- the configuration of the electronic device 1 according to the first embodiment is employed to insulate the electronic circuit board of the remote controller from the electronic circuit board of the interface. If the configuration of FIG. 1 is adopted, the electronic circuit board of the remote control and the electronic circuit board of the interface are not connected by wire, but are electrically connected using electromagnetic induction action, so that they are insulated from each other. There is an advantage that there is no possibility of electric shock even if a person touches the terminal portion.
- the first electronic circuit board 2 and the second electronic circuit board 4 are configured inside the electronic device 1, but the second electronic circuit board 4 is not necessarily inside the electronic device 1. There is no need. It is assumed that the first electronic circuit board is an outdoor unit control board of the air conditioner and the second electronic circuit board 4 is a maintenance circuit board of the air conditioner.
- the maintenance circuit board is a movable device that is carried by a maintenance person.
- the maintenance circuit board When performing maintenance or the like of the air conditioner, it is necessary to connect the maintenance circuit to a contact terminal provided on the outdoor unit board.
- the outdoor unit of the air conditioner is installed outdoors and is in an environment that is affected by temperature changes, direct sunlight, wind and rain, etc., the above contact terminals are likely to deteriorate due to the influence of the environment. .
- the electronic apparatus 1 according to the first embodiment it is not necessary to connect the outdoor unit control base of the air conditioner and the maintenance circuit board by electrical connection. The electrical connection is not affected much. Thereby, the environmental degradation tolerance of an outdoor unit control board can be improved.
- the first electronic circuit board 2 and the second electronic circuit board 4 are electrically connected to each other by electromagnetic induction. It is possible to connect the two electronic circuit boards 4 without wire connection. Thereby, it is possible to insulate between the first electronic circuit board 2 and the second electronic circuit board 4.
- the reliability of the connecting portion is improved and the aging deterioration and the environmental deterioration resistance are improved. Is possible.
- the connecting portion between the first electronic circuit board 2 and the second electronic circuit board 4 can be reduced in size and thickness, and the electronic device on which these are mounted can be reduced in size. Become. Furthermore, the connection portion between the first electronic circuit board 2 and the second electronic circuit board 4 can be easily handled, and the first electronic circuit board 2 and the second electronic circuit board 4 can be easily attached and detached.
- the coil 3 connected to the first electronic circuit board 2 and the second electronic circuit board 4 is formed of a flexible substrate, the coil 3 can be reduced in size and thickness.
- the electronic device 1 to be used can be downsized.
- the flexible substrate is thin and can be bent, the degree of freedom of the arrangement position of the coil is improved and the handling becomes easy.
- the communication speed can be improved as compared with the case of using a photocoupler.
- the thickness of the coil 3 can be reduced, and by providing a magnetic body on the opposite surface of the opposing surfaces of the first coil 3a and the second coil 3b, the influence on the peripheral circuit due to the leakage of magnetic flux can be suppressed. It is possible to improve the degree of coupling between the first coil 3a and the second coil 3b.
- Embodiment 2 FIG.
- the coil 3 used for communication and the coil 3 used for power transmission / reception are shared. Therefore, in the first embodiment, the coil 3 connected to the first electronic circuit board 2 is only the first coil 3a, and the coil 3 connected to the second electronic circuit board 4 is only the second coil 3b. It was.
- the coil 3 is configured separately for power transmission and reception and for communication.
- the communication speed is, for example, less than the supply power of 100 mW.
- communication can be performed using a carrier wave for power supply.
- the communication coil and the power coil can be shared.
- the coil 3 is divided and used as a communication coil and a power coil in order to improve both the communication speed and the power supply amount.
- the communication speed is 240 kbps or higher and the feed power is 1 W or higher.
- FIG. 5 is a configuration diagram of the electronic apparatus 1 according to the second embodiment of the present invention.
- the same components as those in FIG. 1 described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- a first communication coil 3 ⁇ / b> Ca is connected to the primary-side non-contact power feeding / communication unit 6 on the primary-side communication circuit 7, and the primary-side power supply circuit 8 is connected to the first electronic circuit board 2.
- 3 Pa is connected.
- the second electronic circuit board 4 is connected with the second communication coil 3 ⁇ / b> Cb to the secondary side communication circuit 11 of the secondary side non-contact power feeding / communication unit 10.
- the power coil 3Pb is connected.
- Each coil has a configuration in which the first communication coil 3Ca and the second communication coil 3Cb face each other, and the first power coil 3Pa and the second power coil 3Pb face each other.
- each coil 3 is configured by a flexible substrate including a flexible substrate 21 and a circuit pattern 22 made of copper foil fixed on the flexible substrate 21. It is a coil. Specifications such as the number of windings of the coils are not the same for the communication coils 3Ca and 3Cb and the power coils 3Pa and 3Pb, and the specifications can be changed to obtain the respective performances. Moreover, you may change specifications, such as the number of windings, without making the 1st coil and 2nd coil which oppose into the coil of the same specification.
- FIG. 6 is a diagram illustrating an arrangement example of the first communication coil 3Ca and the second communication coil 3Cb, and the first power coil 3Pa and the second power coil 3Pb.
- 25Ca is a connection terminal of the first communication coil 3Ca
- 25Cb is a connection terminal of the second communication coil 3Cb
- 25Pa is a connection terminal of the first power coil 3Pa
- 25Pb is a connection of the second power coil 3Pb. Terminal.
- the first communication coil 3Ca and the second communication coil 3Cb face each other, and the first power coil 3Pa and the second power coil 3Pb face each other.
- the upper magnetic body 31a and the lower magnetic body 31b are disposed so as to sandwich the entire coil, and the middle magnetic body 31c is disposed so as to separate the communication coil and the power coil.
- Reference numeral 30 denotes a gap between the first coil and the second coil in each of the communication coil and the power coil.
- One of the communication coils (second communication coil 3Cb in FIG. 6) is arranged on one side of the middle magnetic body 31c, and one of the power coils (second power coil 3Pb in FIG. 6) is arranged on the other side. Is done.
- the first communication coil 3Ca is disposed on the upper side and the first power coil 3Pa is disposed on the lower side, with the middle magnetic body 31c interposed between the gaps 30. Further, an upper magnetic body 31a is disposed outside the first communication coil 3Ca, and a lower magnetic body 31b is disposed below the first power coil 3Pa. In this way, the coils are arranged so as to overlap in the surface direction of the flexible substrate coil.
- FIG. 7 is a diagram illustrating another arrangement example of the first communication coil 3Ca and the second communication coil 3Cb, and the first power coil 3Pa and the second power coil 3Pb.
- the communication coils 3Ca and 3Cb and the power coils 3Pa and 3Pb may interfere with each other depending on usage conditions such as a frequency and a current value, thereby reducing the performance of each. In such a case, interference can be suppressed with the configuration shown in FIG.
- the communication coils 3Ca and 3Cb and the power coils 3Pa and 3Pb are separated by the middle magnetic body 31c, but there is a possibility that interference may occur through this. Therefore, as shown in FIG. 7, the middle magnetic body 31c is divided into the middle magnetic body 31d and the middle magnetic body 31e, and the magnetic shielding material 32 is sandwiched between them, so that the communication coils 3Ca and 3Cb and the power coils 3Pa, The magnetic flux between 3Pb is interrupted and mutual interference is suppressed.
- an aluminum sheet or plate can be used as the magnetic shielding material 32.
- Aluminum is a non-magnetic material in a DC magnetic field and does not affect the magnetic flux output from the coil, but aluminum is a diamagnetic material in the AC magnetic field and generates a magnetic flux in a direction that cancels the magnetic flux generated from the coil. Due to this action, the magnetic flux is transmitted through the opposite surface of the magnetic shielding material 32, and interference between the coils can be suppressed.
- FIG. 8 is a diagram illustrating a configuration example for separating the coil 3 for communication and power.
- the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals and description thereof is omitted. 5 to 7, the configuration example in which the communication coil and the power coil are divided is shown.
- a coil as shown in FIG. 8 can be used as a method of separating the coils for communication and power.
- the coil shown in FIG. 8 is a coil formed of a flexible substrate as in FIGS. 2 and 3, but one coil is divided into a plurality of coils by dividing one winding into a plurality of pieces using the intermediate tap 27. Used as
- FIG. 8 shows an example in which an intermediate tap 27 is provided on the coil shown in FIG. 2 and two coils having different winding numbers are configured. The smaller number of turns is used as a communication coil, and the larger number of turns is used as power.
- the communication coil and the power coil can be formed on a single flexible substrate, there is no need to overlap the communication coil and the power coil as shown in FIGS. It can be set as the structure similar to FIG. 4 so that a coil and a 2nd coil may be made to oppose, and a magnetic body may be arrange
- the effect of suppressing mutual interference is reduced.
- the same effects as in the first embodiment are obtained. Can be demonstrated.
- the coil 3 connected to the first electronic circuit board 2 and the second electronic circuit board 4 is formed of a flexible board, the same effects as those of the first embodiment can be exhibited.
- the coil 3 is divided into a communication coil and a power coil as in the second embodiment, the coil itself can be made thin by using the flexible substrate coil, and therefore the coil occupies it. An increase in volume can be suppressed. Thereby, it is possible to reduce the size of an electronic device on which these are mounted.
- the coils can be arranged so as to be close to each other. Thereby, the increase in coil volume can be suppressed and it becomes possible to obtain the same handling ease as the case where a set of coils like the structure which shared the coil is used.
- one coil is divided into a plurality of coils and used as a communication coil and a power coil, thereby obtaining the same ease of handling as one coil. It becomes possible. Further, as compared with the case where a plurality of coils are used, the positioning of the opposing coils can be realized with only one coil, and the reliability of the coil performance can be improved.
- Embodiment 3 In the third embodiment of the present invention, a configuration in which the number of turns of a coil winding (inductance value of a coil) is adjusted by using a characteristic of a flexible substrate coil and connecting a plurality of coils in series will be described. Since the configuration other than the coil 3 described later with reference to FIG. 9 is the same as that of the first and second embodiments, description thereof will be omitted.
- the coil 3 When the coil 3 is used as a power coil, it is necessary to transmit a larger amount of power compared to the communication coil, so that the current flowing through the coil needs to be larger than that of the communication coil.
- the electric power supplied by electromagnetic induction between the first coil and the second coil may be on the order of several mW. However, in power applications, several hundred mW to several W are required to operate the second electronic circuit board 4. It is necessary to supply the above power. For this reason, in the application of the power coil, it is necessary to perform power transmission 100 to 1000 times or more compared with the communication coil.
- the number of turns of the power coil winding In order to send a large amount of power, the number of turns of the power coil winding must be larger than the number of turns of the communication coil winding as a coil specification.
- the winding ratio of the coil for communication and the coil for power requires 4 or more for power with respect to 1 for communication.
- the electric current sent through a coil for communication requires a high frequency according to the communication speed.
- the frequency of the carrier used for communication may be 2.4 MHz, which is about 10 times the communication speed.
- the frequency of the carrier wave used for communication may be 2.4 GHz.
- the frequency of the current flowing through the power coil needs to be lower than that for communication.
- a frequency of the order of MHz or higher is used for power transmission, an element capable of operating at a high frequency and capable of flowing a large current is required. This increases the cost of the electronic circuit, and causes a loss due to capacitive coupling of the circuit due to the high frequency.
- the handling of the circuit is complicated because the point and the circuit design are sophisticated. For this reason, it is necessary to set the current flowing in the power coil to a low frequency compared to communication, and to increase the inductance of the coil in order to enhance the effect of electromagnetic induction, that is, to increase the number of turns of the coil winding.
- a carrier frequency for generating a coil current used for communication is a frequency of MHz or more, and a carrier frequency for generating a coil current used for power is 10 kHz to 500 kHz.
- a coil composed of a flexible substrate can overlap the number of coil patterns on the same circumference by the number of layers of the multilayer substrate. For this reason, when the number of turns is the same, the inductance is lower and the coil performance is lower compared to a coil configured by winding the winding around the bobbin with the same size, but the thickness is reduced compared to the winding coil. be able to.
- the number of windings of the coil inductance value of the coil
- the arrangement of the magnetic material can be dealt with by arranging it on the opposite surface of the coil facing surface as in the case of one coil.
- FIG. 9 is a diagram illustrating a coil configuration of the electronic apparatus 1 according to the third embodiment.
- the first coil 3a is composed of two coils 3a-1, 3a-2, and each coil is connected in series with connection terminals 25a-1, 25a-2 of each coil provided in the first coil 3a. Connect to be connected.
- the second coil 3b is composed of two coils 3b-1, 3b-2, and each coil is connected in series with the connection terminals 25b-1, 25b-2 of each coil provided in the second coil 3b. Connect to become.
- the first coil 3a can have a winding number twice that of the coil 3a-1.
- the coils 3a-1 and 3a-2 may be coils having different specifications.
- the combination of the coil 3b-1 and the coil 3b-2 can be changed according to the required specifications.
- FIG. 9 shows an example in which the number of turns of the coil winding is changed by changing the series number of the coils according to the use conditions by the flexible substrate coil, but this means that the first coil 3a and the second coil 3b are communicated with each other. This is particularly effective in a configuration in which the coils 3Ca and 3Cb for power and the coils 3Pa and 3Pb for power are divided.
- the power coil When comparing the communication coil and the power coil, the power coil transmits a larger amount of power through the coil than the communication coil, so the number of turns of the coil winding is large (inductance of the coil is increased). There is a need to. Rather than making multiple coils with different specifications, using only one type of coil can reduce the cost per coil, so the specifications for the communication coil and power coil are the same, and the power coil is in series. The necessary number of turns of the coil winding (inductance value of the coil) is obtained by increasing the number.
- the thickness of the coil formed of a flexible substrate is 50 ⁇ m or less, even if a plurality of coils are stacked, it can be made thinner than the thickness of the electronic circuit substrate.
- the circuit configuration is preferably symmetrical.
- the specifications (the number of windings) of the first power coil 3Pa and the second power coil are as follows: It does not have to be the same.
- the number of turns of the second power coil 3Pb is preferably larger than that of the first power coil 3Pa.
- the first coil 3a and the second coil 3b are configured by flexible substrate coils, and the coils are configured with various specifications by changing the number of series according to use conditions. I was able to do it. Therefore, the coils connected in series can be overlapped, and at the same time, the magnetic body can be arranged on the opposite surface of the opposing surface as in the case of one coil. This facilitates the configuration of the coil with various specifications, and enables the coil to be reduced in size and thickness.
- the coil specification can be easily changed depending on the number of series connections, so that it is possible to cope with a coil of any winding specification with a small number of types of coils. Can be reduced. Thereby, the cost required for coil production can be reduced, and an increase in cost of an electronic device using the coil can be suppressed.
- the third embodiment by composing the communication coil and the power coil separately, a large difference between the communication carrier frequency and the power carrier frequency, for example, a difference of 100 times or more is obtained. It is also easy to turn on. Therefore, it is easy to use a carrier frequency suitable for communication and power applications.
- Embodiment 4 FIG.
- a configuration for adjusting the cross-sectional area (current capacity) of a coil winding by using a feature of a flexible substrate coil and connecting a plurality of coils in series will be described. Since the configuration other than the coil 3 described later with reference to FIG. 10 is the same as in the first and second embodiments, description thereof is omitted.
- the coil made of a flexible substrate is limited in the thickness of the copper foil of the coil pattern due to its structure, and is about 35 ⁇ m at the maximum as an example. It is possible to configure as many parallel circuits as possible by configuring a circuit with a flexible substrate of a multilayer substrate, but the layers constituting the parallel pattern are the same as the same coil winding, so the area of the coil is reduced. Assuming that it is constant, the number of turns of the coil that can be configured in one coil is reduced as compared with the case where the parallel pattern is not used.
- FIG. 10 is a diagram illustrating a coil configuration of the electronic apparatus 1 according to the fourth embodiment.
- the first coil 3a is composed of two coils 3a-1 and 3a-2, and the coils are connected in parallel to the connection terminals 25a-1 and 25a-2 of the coils provided in the first coil 3a. Connect to be connected.
- the second coil 3b is composed of two coils 3b-1, 3b-2, and each coil is connected in series with the connection terminals 25b-1, 25b-2 of each coil provided in the second coil 3b. Connect so that
- the first coil 3a can have the same number of turns as the coil 3a-1, and the sectional area of the coil pattern can be doubled.
- the second coil 3b is configured similarly to the first coil 3a-1 and the coil 3a-2.
- the connection terminals of the respective coils arranged in parallel are collected into a first coil connection terminal 33a and a second coil connection terminal 33b.
- FIG. 10 shows an example in which the cross-sectional area (current capacity) of the coil winding is changed by changing the parallel number of the coils according to the use conditions by the flexible substrate coil, but this is the case with the first coil 3a and the second coil.
- This is particularly effective in a configuration in which 3b is divided into communication coils 3Ca and 3Cb and power coils 3Pa and 3Pb.
- the size of the communication coil and the size of the power coil As compared with the communication coil, it is necessary to increase the number of turns of the coil winding, and it is also necessary to flow a large amount of current. Although it is possible to configure the size of the communication coil and the size of the power coil to be different sizes, coils having different specifications are required, and when these coils are arranged inside the electronic device 1, they are used for communication. Since the difference in size between the coil and the power coil affects the arrangement position and arrangement means, the size of the communication coil and the power coil should be the same.
- this coil in order to obtain the current capacity required for the power coil by using the same coil size for the coil specification, particularly the coil size, and the communication coil and the power coil, this coil must be connected in parallel. Use.
- the coils may be connected in series. By combining the series connection of the flexible substrate coils described in the third embodiment and the parallel connection of the flexible substrate coils described in the fourth embodiment, the number of turns of the coil winding (inductance) and the sectional area of the coil winding ( Current capacity) can be changed.
- the following describes an example in which the third embodiment and the fourth embodiment are combined to form one coil using both series and parallel. Two sets of coils having the same specifications are used, and two sets of two connected in series are configured and connected in parallel. As a result, it is possible to configure a coil in which the number of turns of the coil winding is doubled and the cross-sectional area (current capacity) of the coil winding is doubled compared to a single basic coil. By superposing these four coils and arranging the magnetic body 31 on one surface of the coil as in FIG. 4, the first or second coil can be configured.
- the first coil 3a and the second coil 3b are configured by flexible substrate coils, and the coils have various current capacities by changing the parallel number according to use conditions. Made it configurable. Therefore, the coils connected in parallel can be overlapped, and at the same time, the magnetic material can be arranged on the opposite surface of the opposing surface as in the case of one coil. This facilitates the configuration of the coil with various specifications, and enables the coil to be reduced in size and thickness.
- the coil specification can be easily changed depending on the number of parallel connections, so that it is possible to cope with a coil with an arbitrary current capacity specification with a small number of types of coils. Can be reduced. Thereby, the cost required for coil production can be reduced, and an increase in cost of an electronic device using the coil can be suppressed.
- FIG. FIG. 11 is a configuration diagram of the electronic apparatus 1 according to the fifth embodiment of the present invention.
- FIG. 1 shows an arrangement example of the first electronic circuit board 2, the second electronic circuit board 4, the first coil 3a, and the second coil 3b inside the electronic apparatus 1.
- the electronic device 1 includes a first electronic circuit board 2 and a second electronic circuit board 4.
- the first electronic circuit board 2 is a circuit that realizes the main function of the electronic device 1, and includes a primary side circuit component 34a, a primary side coil connection part 35a, a first coil 3a connected to the primary side coil connection part 35a, a first coil A magnetic body 31a is provided on one surface of one coil 3a.
- the second electronic circuit board 4 is a circuit that realizes an auxiliary function of the electronic device 1 and is a second coil connected to the secondary side circuit component 34b, the secondary side coil connection part 35b, and the secondary side coil connection part 35b. 3b, and a magnetic body 31b disposed on one surface of the second coil 3b.
- Magnetic material placed on one side of the coil to suppress the influence of malfunctions on the electronic circuit board due to the magnetic flux generated from the coil, and to reduce the power supply performance and communication performance due to the metal in the vicinity of the coil You may arrange
- the magnetic body 31b is fixed to the surface where the secondary circuit component 34b is not mounted, and the second coil 3b is fixed to the surface of the magnetic body 31b opposite to the electronic circuit board. Since the second coil 3b is composed of a flexible substrate, the connection terminal portion 24b of the second coil 3b is bent and fixed to the surface opposite to the mounting surface of the secondary circuit component 34b of the second electronic circuit substrate 4. is doing.
- the first coil 3a connected to the first electronic circuit board 2 is also formed of a flexible board, between the lower surface of the second electronic circuit board 4 and the case of the electronic device 1 (not shown), etc. It can be arranged in a narrow space. In the example of FIG. 11, the example in which the second coil 3 b is fixed to the second electronic circuit board 4 has been described, but the first coil 3 a may be fixed to the first electronic circuit board 2.
- the fifth embodiment it is possible to reduce the space required for connection between the first electronic circuit board 2 and the second electronic circuit board 4, thereby reducing the size and thickness of the electronic device 1. And cost reduction can be realized. Further, by fixing one coil to the electronic circuit board, the first electronic circuit board 2 and the second electronic circuit board 4 can be easily arranged and fixed, and the handling is simplified.
- FIG. 12 is a configuration diagram of the electronic apparatus 1 according to the sixth embodiment of the present invention. Each component in FIG. 12 is the same as that in FIG. 11 except for the arrangement method.
- the magnetic body 31a is fixed to the surface where the primary circuit component 34a is not mounted, and the first coil 3a is fixed to the surface of the magnetic body 31a opposite to the electronic circuit board. Since the first coil 3a is composed of a flexible substrate, it is fixed to the surface opposite to the mounting surface of the primary circuit component 34a of the first electronic circuit board 2 by bending the connection terminal portion 24a of the first coil 3a. Yes.
- the magnetic body 31b is fixed to the surface on which the secondary circuit component 34b is not mounted, and the second coil 3b is fixed to the surface of the magnetic body 31b opposite to the electronic circuit board. Yes.
- the connection terminal portion 24b of the second coil 3b is bent and fixed to the surface opposite to the mounting surface of the secondary circuit component 34b of the second electronic circuit substrate 4. ing.
- the first electronic circuit board 2 and the second electronic circuit board 4 configured as described above are arranged so that the coils face each other.
- the first electronic circuit board 2 and the second electronic circuit board 4 are respectively fixed by a case (not shown) of the electronic device 1.
- FIG. 13 is a configuration diagram of the electronic apparatus 1 according to the seventh embodiment of the present invention.
- the figure shows a first electronic circuit board 2, a second electronic circuit board 4, a first communication coil 3Ca, a first power coil 3Pa, a second communication coil 3Cb, and a second power coil inside the electronic device 1.
- An arrangement example of 3Pb is shown.
- the electronic device 1 includes a first electronic circuit board 2 and a second electronic circuit board 4.
- the first electronic circuit board 2 is a circuit that realizes the main function of the electronic device 1, and is connected to the primary side circuit component 34a, the primary side communication coil connection part 35Ca, and the primary side communication coil connection part 35Ca.
- the first power coil 3Pa connected to the magnetic coil 31 arranged on one surface of the communication coil 3Ca, the first communication coil 3Ca, the primary power coil connection part 35Pa, and the primary power coil connection part 35Pa.
- the magnetic body 31 disposed on one surface of the first power coil 3Pa, the first communication coil 3Ca and the first power coil 3Pa, and the coil fixing means 36 for fixing the magnetic body disposed on each coil are provided. Prepare.
- the second electronic circuit board 4 is a circuit that realizes an auxiliary function of the electronic device 1 and is connected to the secondary side circuit component 34b, the secondary side communication coil connection part 35Cb, and the secondary side communication coil connection part 35Cb.
- a two-power coil 3Pb is provided.
- the second communication coil 3Cb and the second power coil 3Pb are arranged on different surfaces of the magnetic body 31, respectively.
- the configurations of the second communication coil 3Cb, the second power coil 3Pb, and the magnetic body 31 in FIG. 13 are the same as the configurations shown in FIG. 6 of the second embodiment.
- the configuration shown in FIG. 7 may be used. Since the details of these configurations are the same as those of the second embodiment, description thereof is omitted.
- the first communication coil 3Ca and the first power coil 3Pa are fixed so that the magnetic body 31 is sandwiched between the coil 3 and the coil fixing means 36 inside the coil fixing means 36, respectively.
- the first communication coil 3Ca and the first power coil 3Pa are fixed to the coil fixing means 36 in a state of facing each other.
- a gap is formed between the opposing first communication coil 3Ca and the first power coil 3Pa, and the second communication coil 3Cb and the second power coil 3Pb and the magnetic body 31 sandwiched between them are formed here.
- the coil connected to the 2nd electronic circuit board 4 comprised from this is inserted.
- the first communication coil 3Ca and the second communication coil 3Cb are arranged to face each other, and the first power coil 3Pa and the second power coil 3Pb are arranged to face each other.
- An inter-coil gap 30 is generated between the first communication coil 3Ca and the second communication coil 3Cb, and between the first power coil 3Pa and the second power coil 3Pb.
- the first communication coil 3Ca and the first power coil 3Pa are sandwiched by applying pressure so that the second communication coil 3Cb and the second power coil 3Pb are in close contact with each other. But you can. This improves the degree of coupling between the coils.
- the means in which the coil fixing means 36 is provided in the coil connected to the first electronic circuit board 2 side has been described.
- the fixing means 36 may be used in the second coil instead of the first coil.
- Magnetic material placed on one side of the coil to suppress the influence of malfunctions on the electronic circuit board due to the magnetic flux generated from the coil, and to reduce the power supply performance and communication performance due to the metal in the vicinity of the coil You may arrange
- the first electronic circuit board 2 and the second electronic circuit board 4 can be easily connected.
- each coil is formed of a flexible substrate, it is possible to reduce the space required for fixing the coil, and thus the electronic device 1 can be reduced in size, thickness, and cost. Further, by sandwiching and fixing one coil between the other coils, the arrangement and fixing of the first electronic circuit board 2 and the second electronic circuit board 4 are facilitated, and the handling is simplified.
- Embodiment 8 FIG.
- the peripheral configuration of the first electronic circuit board 2 and the second electronic circuit board 4 has been mainly described.
- the eighth embodiment of the present invention a specific operation example related to communication between both boards and power transmission / reception will be described.
- the configuration of each unit is exemplified as a configuration in which the communication coil and the power coil are separated as in the second embodiment. However, even when both are shared, in principle, Note that the operation is similar.
- FIG. 14 shows a configuration example of the primary side power supply circuit 8 of the primary side non-contact power feeding / communication unit 6 and the secondary side power circuit 12 of the secondary side non-contact power feeding / communication unit 10 according to the eighth embodiment.
- the primary side power supply circuit 8 includes a power supply unit 40, a primary side smoothing means 41, an AC conversion means 42, and a primary side resonance capacitor 43.
- the secondary side power supply circuit 12 includes a secondary side resonance capacitor 44, a rectifying unit 45, a secondary side smoothing unit 46, a voltage conversion unit 47, and a secondary side voltage output unit 48.
- the power supply unit 40 indicates a supply point of power supplied from the main function unit 5 of the first electronic circuit board 2.
- the primary side smoothing means 41 is comprised from an electric field capacitor.
- the AC conversion means 42 includes a switching element configured in a bridge shape such as a transistor, a MOSFET, or an IGBT, and a switching element control means 42e that controls on / off of each switching element. Reference numerals 42a, 42b, 42c and 42d denote switching elements, respectively.
- the AC conversion means 42 has a full bridge circuit configuration, but may have a half bridge circuit configuration.
- the switching elements 42a to 42d are on / off controlled by a switching element control means 42e (not shown).
- the rectifying means 45 is constituted by a diode or the like.
- the secondary side smoothing means 46 includes a capacitor 46a or an electric field capacitor 46b.
- the voltage conversion means 47 includes a regulator 47a, a capacitor 47b, and an electric field capacitor 47c.
- DC power supplied from the power supply unit 40 from the main function unit 5 is AC-converted by the AC conversion means 42. It is converted into electric power and supplied to the first power coil 3Pa.
- the AC converter 42 outputs a frequency at which resonance occurs in the first power coil 3Pa and the primary side resonance capacitor 43, and in the second power coil 3Pb and the secondary side resonance capacitor 44.
- the power supplied to the first power coil 3Pa by the AC conversion means 42 is applied to the second power by electromagnetic induction coupling. It is induced in the coil 3Pb.
- the AC power obtained in the second power coil 3 ⁇ / b> Pb is rectified by the rectifying means 45 and the secondary side smoothing means 46. Is converted to DC power by smoothing.
- the direct-current power obtained here is converted into a voltage necessary for driving the second electronic circuit board 4 by the voltage conversion means 47.
- the first power coil 3Pa and the primary resonance capacitor 43 are connected in series, but may be connected in parallel depending on the circuit configuration used.
- the second power coil 3Pb and the secondary resonance capacitor 44 are connected in parallel, but may be connected in series depending on the circuit configuration used.
- FIG. 15 shows a configuration example of the primary side communication circuit 7 in the primary side non-contact power feeding / communication unit 6 and the secondary side communication circuit 11 in the secondary side non-contact power feeding / communication unit 10 according to the eighth embodiment.
- the primary side communication circuit 7 includes a primary side modulation circuit 7 a, a primary side demodulation circuit 7 b, a primary side signal synthesizing / dividing unit 7 c, and a primary side communication resonance capacitor 50.
- the primary communication circuit 7 is connected to the first communication coil 3Ca and the main function unit 5.
- a transmission signal output from the main function unit 5 is input to the primary communication circuit 7 via the main function signal output line 13, and a reception signal input to the main function unit 5 is output from the main function signal input line 14.
- the primary side modulation circuit 7 a includes a primary side carrier wave generation means 52, a primary side modulation means 53, and a primary side current control means 54.
- the primary side demodulating circuit 7 b includes a primary side demodulating means 55, a primary side signal amplifying means 56, and a primary side buffer means 57.
- the primary side modulation circuit 7a and the primary side signal combining / dividing means 7c are connected to the primary side transmission signal input 51, and the primary side demodulating circuit 7b and the primary side signal combining / dividing means 7c are connected to the primary side received signal output 58.
- the primary power source 59 is a power source obtained from the main function unit power output 15.
- the primary function unit output signal line 13 or the main function unit input signal line Used when there are a plurality of 14s.
- the main function unit output signal line 13 signal synthesis is not necessary, so the main function unit signal output 13 and the primary side transmission signal input 51 may be directly connected.
- the number of main function unit input signal lines 14 is one, signal division is unnecessary, and therefore the main function unit input signal lines 14 may be directly connected to the primary side received signal output 58. If the primary signal combining / dividing means 7c is not necessary, it may be omitted.
- the primary side modulation circuit 7a (primary side carrier wave generation means 52, primary side modulation means 53, and primary side current control means 54) is used when a communication signal is transmitted from the first electronic circuit board 2 to the second electronic circuit board 4.
- the primary side demodulation circuit 7b (primary side demodulation means 55, primary side signal amplification means 56, and primary side buffer means 57) is used when the first electronic circuit board 2 receives a communication signal from the second electronic circuit board 4.
- the secondary side communication circuit 11 includes a secondary side modulation circuit 11a, a secondary side demodulation circuit 11b, a secondary side signal combining / dividing unit 11c, and a secondary side communication resonance capacitor 60.
- the secondary communication circuit 11 is connected to the second communication coil 3 ⁇ / b> Cb and the auxiliary function unit 9.
- a transmission signal output from the auxiliary function unit 9 is input to the secondary communication circuit 11 via the auxiliary function signal output line 17, and a reception signal input to the auxiliary function unit 9 is output from the auxiliary function signal input line 16.
- the secondary side modulation circuit 11a includes secondary side carrier wave generation means 62, secondary side modulation means 63, and secondary side current control means 64
- the secondary side demodulation circuit 11b includes secondary side demodulation means 65, secondary side demodulation means 65, Side signal amplifying means 66 and secondary side buffer means 67 are provided.
- the secondary side modulation circuit 11a and the secondary side signal combining / dividing unit 11c are connected to the secondary side transmission signal input 61, and the secondary side demodulating circuit 11b and the secondary side signal combining / dividing unit 11c are connected to the secondary side.
- a reception signal output 68 is connected.
- the secondary power source 69 is a power source obtained from the auxiliary function unit power input 18.
- the secondary side signal combining / dividing unit 11c has a plurality of signals output from the auxiliary function unit 9 or signals input to the auxiliary function unit 9, that is, the auxiliary function unit output signal line 17 or the auxiliary function unit input signal. Used when there are a plurality of lines 16. When there is one auxiliary function unit output signal line 17, signal synthesis is not necessary, so the auxiliary function unit signal output 17 and the secondary transmission signal input may be directly connected. Further, when there is one auxiliary function unit input signal line 16, it is not necessary to divide the signal. Therefore, the auxiliary function unit input signal line 16 may be directly connected to the secondary side received signal output 68. If the secondary signal combining / dividing means 11c is not necessary, it may be omitted.
- the secondary modulation circuit 11a (secondary carrier generation means 62, secondary modulation means 63, and secondary current control means 64) transmits a communication signal from the second electronic circuit board 4 to the first electronic circuit board 2. Used when In the secondary side demodulation circuit 11b (secondary side demodulation means 65, secondary side signal amplification means 66, and secondary side buffer means 67), the second electronic circuit board 4 receives a communication signal from the first electronic circuit board 2. Sometimes used.
- FIG. 15 shows a configuration example in which the configurations of the primary side communication circuit 7 and the secondary side communication circuit 11 are symmetric.
- the modulation scheme uses an ASK (Amplitude Shift Keying) scheme.
- the primary carrier generation means 52 generates a carrier used for communication.
- a carrier wave a sine wave, a triangular wave, a square wave, or the like is used.
- the primary side modulation means 53 generates a communication signal for performing communication by electromagnetic induction from the carrier wave obtained from the primary carrier wave generation means 52 and the transmission signal obtained from the primary side transmission signal input 51. In the example shown in FIG. 15, it is configured by an AND circuit.
- the primary side demodulation means 55 demodulates the received signal from the current obtained in the first communication coil 3Ca.
- the modulation method is the ASK method
- the modulation is a rectifier circuit composed of a capacitor and a diode as a configuration for removing components.
- the primary side signal amplification means 56 amplifies the demodulated signal.
- an amplifier circuit using an operational amplifier is used.
- the primary side buffer means 57 stabilizes the received communication signal as a digital signal.
- the functions of 67 are the same as those of the primary side carrier wave generation means 52, the primary side modulation means 53, the primary side current control means 54, the primary side demodulation means 55, the primary side signal amplification means 56, and the primary side buffer means 57, respectively. Description is omitted.
- FIG. 15 shows an example in which the modulation method is the ASK method.
- PSK Phase Shift Keying
- FSK Frequency Shift Keying
- QAM Quadrature Amplitude Modulation
- FIG. 16 is a diagram showing a configuration example of the primary side signal synthesis / division means 7c. Since the basic operation of the primary side signal combining / splitting unit 7c and the secondary side signal combining / splitting unit 11c is the same, the following description will focus on the primary side signal combining / splitting unit 7c.
- the primary side modulation circuit 7a and the primary side demodulation circuit 7b, which are configured inside the primary side communication circuit 7, are the same as those described in FIG.
- the main function unit output signal line 13 is a main function unit serial output signal line 13 s and a main function unit parallel output signal line 13 p.
- the main function unit input signal line 14 is a main function unit serial input signal line 14s and a main function unit parallel input signal line 14p.
- the signal used in the main function unit serial output signal line 13s is a serial output signal for the main function unit 5 to perform serial communication with the auxiliary function unit 9, and the signal used in the main function unit serial input signal line 14s is This is a serial input signal for the main function unit 5 to perform serial communication with the auxiliary function unit 9.
- the signal used in the main function unit parallel signal output line 13p is an RTS (Request to Send) signal used for hardware flow control in serial communication
- the signal used in the main function unit parallel signal input line 14p is CTS. (Clear to Send) signal.
- RTS and CTS are both 1-bit signals.
- the main components of the primary side signal synthesizing / dividing means 7c are a data synthesizing unit 71 for synthesizing a plurality of data, a data dividing unit 72 for dividing into a plurality of data, and a timer 73 for managing time.
- the main function unit serial output signal line 13s is connected to the serial data receiving unit 74.
- the serial data receiving unit 74 samples the serial data transmitted from the main function unit 5 at a predetermined cycle to receive serial data. Do.
- the serial data receiving means 74 is connected to the coil transmission data buffer 76.
- the serial data receiving unit 74 stores the received serial data in a predetermined area of the coil transmission data buffer 76.
- the main function unit parallel output signal line 13p is connected to the data encoder unit 75.
- the data encoder 75 reads data input from the main function unit parallel output signal line 13p.
- the data encoder unit 75 is connected to the coil transmission data buffer 76, reads data input from the main function unit parallel output signal line 13p, and stores it in a predetermined area of the coil transmission data buffer 76. At this time, the data encoder unit 75 may simply convert the data input from the main function unit parallel output signal line 13p from parallel data to serial data. Alternatively, data conversion processing such as data compression and redundancy may be performed, and the converted data may be stored in the coil transmission data buffer 76.
- the coil transmission data buffer 76 is connected to the coil transmission unit 77.
- the coil transmission unit 77 has a period corresponding to a predetermined communication speed determined to perform communication between the primary side communication circuit 7 and the secondary side communication circuit 11 with respect to the data stored in the coil transmission data buffer 76. Then, the signal is output to the modulation circuit 7 a connected via the primary side transmission signal input 51.
- the modulation circuit 7a is connected to the first communication coil 3Ca, modulates the signal output from the coil transmitter 77, and controls the current flowing through the first communication coil 3Ca.
- the coil receiver 78 is connected to the demodulator circuit 7b connected to the first communication coil 3Ca via the primary side received signal output 58, and the signal received via the first communication coil 3Ca is received by the demodulator circuit 7b.
- the signal is demodulated, and sampling is performed at a cycle corresponding to a predetermined communication speed determined to perform communication between the primary side communication circuit 7 and the secondary side communication circuit 11 as a reception signal from the coil.
- the coil receiver 78 is connected to the coil reception data buffer 79 and sequentially stores the sampled data in the coil reception data buffer 79.
- the coil reception data buffer 79 is connected to the serial data transmission unit 80 and the data decoder unit 81.
- the serial data transmission means 80 is connected to the main function unit serial input line 14s, and the data stored in a predetermined area of the coil reception data buffer 79 is serialized in the main function unit at a cycle corresponding to the serial communication speed of the main function unit 5. Output to the input line 14s.
- the data decoding unit 81 is connected to the main function unit parallel input line 14p, and outputs data stored in a predetermined area of the coil reception data buffer 79 to the main function unit parallel input line 14p as an input signal of the main function unit 5. .
- the data decoder unit 81 may simply output data in a predetermined area of the data stored in the coil reception data buffer 79 to the main function unit parallel input signal property 14p.
- data conversion processing such as data expansion and redundancy deletion is performed on data in a predetermined area of data stored in the coil reception data buffer 79, and the converted data is output to the main function unit parallel input line 14p. May be.
- the timer 73 performs time management in the primary side signal synthesizing / dividing means 7c.
- the timer 73 is connected to the data encoder unit 75, the data decoder unit 81, the coil transmission unit 77, and the coil reception unit 78.
- the timer 73 notifies the data encoder unit 75 of signal reading timing, data conversion timing, storage timing to the coil transmission data buffer 76, and the like of the main function unit parallel output line 13p.
- the data decoder unit 81 is notified of the read timing from the coil reception data buffer 79, the data conversion timing, the update timing of the output signal of the main function parallel input line 14p, and the like.
- the coil transmission unit 77 performs time management of transmission timing when performing communication between the primary side communication circuit 7 and the secondary side communication circuit 11, and notifies the transmission timing. In addition, when the communication between the primary side communication circuit 7 and the secondary side communication circuit 11 is performed with respect to the coil receiving unit 78, time management for performing the next process of reception is performed, and reception completion is performed. Receive operation event timing is received from the coil receiver 78.
- This is the same as the part serial output line 13s, the main function part parallel output line 13p, the main function part serial input line 14s, the main function part parallel input line 14p, and the first communication coil 3Ca.
- the main function unit 5 outputs data to be transmitted to the auxiliary function unit 9 to the main function unit serial output line 13s or the main function unit parallel output line 13p.
- the serial data receiving unit 74 receives the serial data output to the main function unit serial output line 13 s and stores it in a predetermined area of the coil transmission data buffer 76.
- the data encoder unit 75 reads the parallel data output to the main function unit parallel output line 13p based on the read timing by the timer 73, and stores the data in a predetermined area of the coil transmission data buffer 76 after processing such as data conversion. To do.
- Data output from the main function unit serial output line 13s and the main function unit parallel output line 13p is stored in the coil transmission data buffer 76 as one data.
- Data stored in the coil transmission data buffer 76 is communicated between the primary side communication circuit 7 and the secondary side communication circuit 11 by the coil transmission unit 77 via the primary side transmission signal input 51. Therefore, the signal is sent to the modulation circuit 7a at a cycle corresponding to a predetermined communication speed.
- the modulation circuit 7 a outputs a communication signal indicated by 1/0 or High / Low from the primary side transmission signal input 51 to the primary side non-contact power feeding / communication unit 6.
- the primary side modulation means 53 ANDs the carrier wave obtained from the primary side carrier wave generation means 52 and generates a modulation signal.
- the transistor of the primary side current control means 54 is turned on / off by the modulation signal, whereby the current flowing from the primary side power supply 59 to the first communication coil 3Ca is controlled.
- the demodulated communication signal is amplified to a voltage level that can be received by the auxiliary function unit 9 by the secondary side signal amplification circuit 66 and stabilized by the secondary side buffer means 67.
- the stabilized signal is output from the secondary side received signal output 68 and taken into the auxiliary function unit 9.
- the operation when communicating from the auxiliary function unit 9 of the second electronic circuit board 4 to the main function unit 5 of the first electronic circuit board 2 is basically the same as that of the first electronic circuit board 2 because the circuit may be symmetrical. Since it is the same as the communication operation from the main function unit 5 to the auxiliary function unit 9 of the second electronic circuit board 4, the description is omitted.
- the main function unit 5 is described as an output signal to the auxiliary function unit 9 as a serial signal output to the main function unit serial output line 13s and a parallel signal output to the main function unit parallel output line 13p.
- a plurality of signals may be used for each.
- the number of serial receiving means 74 and data encoder units 75 may be increased according to the number of serial signals and parallel signals.
- the signal used here is a digital signal such as a serial signal or a parallel signal. Even in the case of an analog signal, an analog / digital converter (A / D converter) is used instead of the serial receiving means 74 and the data encoder unit 75. ) May be used.
- a / D converter analog / digital converter
- information may be exchanged between the primary side non-contact power supply / communication unit 6 and the secondary side non-contact power supply / communication unit 10.
- information exchange between the primary side non-contact power feeding / communication unit 6 and the secondary side non-contact power feeding / communication unit 10 is performed in the coil transmission data buffer 76 and the coil reception data buffer 78. A data area to be performed may be provided.
- the main function unit 5 and the primary side communication circuit 7 and the auxiliary function unit 9 may be made faster than the communication speed between the secondary side communication circuit 11 and the secondary side communication circuit 11.
- the communication speed between the main function unit 5 and the primary communication circuit 7 and between the auxiliary function unit 9 and the secondary communication circuit 11 is 9600 bps
- the primary communication circuit 7 and the secondary communication circuit If the communication speed between the communication terminal 9 and the communication terminal 9 is 240 kbps and 25 times, it is possible to reduce the influence of processing overhead on the primary side communication circuit 7 and the secondary side communication circuit 11.
- the main function unit output signal line 13 is directly connected to the primary signal input unit 51 without performing signal synthesis and division processing in the primary side signal synthesis / division unit 7c or the secondary side signal synthesis / division unit 11c.
- the auxiliary function unit output signal line 17 may be connected to the secondary transmission signal input 61.
- the main function unit input signal line 14 may be connected to the primary side received signal output 58
- the auxiliary function unit input line 16 may be connected to the secondary side received signal output 68.
- the primary side signal synthesizing / dividing unit 7c and the secondary side signal synthesizing / dividing unit 11c in the primary side communication circuit 7 and the secondary side communication circuit 11 have been shown to be configured by hardware.
- the means 7c and the secondary signal combining / dividing means 11c may be configured by software.
- FIG. 17 is a sequence diagram for explaining the communication operation between the first electronic circuit board 2 and the second electronic circuit board 4.
- the main function unit 5 paying attention to the main function unit 5, the primary-side non-contact power supply / communication unit 6, the auxiliary function unit 9, and the secondary-side non-contact power supply / communication unit 10, a communication sequence between them will be described.
- the main function unit 5 and the primary-side non-contact power feeding / communication unit 6 are connected by a serial communication line and a parallel communication line.
- the auxiliary function unit 9 and the secondary side non-contact power feeding / communication unit 10 are connected by a serial communication line and a parallel communication line.
- the primary-side non-contact power supply / communication unit 6 and the secondary-side non-contact power supply / communication unit 10 are not connected, and a communication signal is transmitted via the coil 3 as described above.
- the primary-side non-contact power supply / communication unit 6 performs regular processing at predetermined time intervals. At this time, the primary-side non-contact power supply / communication unit 6 transmits the main function unit parallel signal PD1 output from the main function unit 5 to the secondary-side non-contact power supply / communication unit 10. The operation in the primary side non-contact power feeding / communication unit 6 is as described above.
- the secondary-side non-contact power supply / communication unit 10 receives the main function unit parallel communication signal PD1 after the reception of the main function unit parallel communication signal PD1 output from the main function unit 5 and then passes the main function unit parallel communication signal PD1 to the auxiliary function unit 9. Output to the parallel input line. Further, the secondary side non-contact power feeding / communication unit 10 transmits the auxiliary function unit parallel communication signal PD ⁇ b> 2 output from the auxiliary function unit 9 to the primary side non-contact power feeding / communication unit 6.
- the output of the main function unit parallel communication signal PD1 to the auxiliary function unit 9 and the output or transmission order of the auxiliary function unit parallel communication signal PD2 are either first or the same. It is good.
- the operation in the secondary side non-contact power feeding / communication unit 10 is as described above.
- the primary side contactless power supply / communication unit 6 After receiving the response including the auxiliary function unit parallel communication signal PD2 from the secondary side contactless power supply / communication unit 10, the primary side contactless power supply / communication unit 6 receives the auxiliary function unit parallel communication signal SD2 as the main function unit 5 To the parallel input signal line. In normal times, similar processing is repeated at predetermined intervals.
- the primary-side non-contact power feeding / communication unit 6 performs regular processing at predetermined time intervals, but before the regular processing, the main function unit 5 sends the primary-side non-contact power feeding / communication unit 6 to the primary-side non-contact power feeding / communication unit 6.
- the main function unit serial transmission signal SD1 is held until the next periodic processing.
- the primary-side non-contact power feeding / communication unit 6 transmits the main function unit parallel signal PD1 and the main function unit serial data SD1 output from the main function unit 5 to the secondary-side non-contact power feeding / communication unit 10.
- the operation in the primary side non-contact power feeding / communication unit 6 is as described above.
- the secondary side non-contact power feeding / communication unit 10 receives the main function unit parallel communication signal PD1 and the main function unit serial communication signal SD1 output from the main function unit 5, and after the elapse of a predetermined period, The communication signal PD1 is output to the parallel input line of the auxiliary function unit 9. Also, the main function unit serial communication signal SD1 is output to the serial input line of the auxiliary function unit 9. Further, the secondary side non-contact power feeding / communication unit 10 transmits the auxiliary function unit parallel communication signal PD ⁇ b> 2 output from the auxiliary function unit 9 to the primary side non-contact power feeding / communication unit 6.
- the output of the main function unit parallel communication signal PD1 to the auxiliary function unit 9, the output of the main function unit serial communication signal SD1 to the auxiliary function unit 9, and the auxiliary function unit may be either first or the same.
- the operation in the secondary side non-contact power feeding / communication unit 10 is as described above.
- the primary side contactless power supply / communication unit 6 After receiving the response including the auxiliary function unit parallel communication signal PD2 from the secondary side contactless power supply / communication unit 10, the primary side contactless power supply / communication unit 6 receives the auxiliary function unit parallel communication signal SD2 as the main function unit 5 To the parallel input signal line.
- auxiliary function unit transmission sequence 103 Next, the case where there is an auxiliary function unit serial communication signal SD2 from the auxiliary function unit 9 to the main function unit 5 will be described.
- the primary-side non-contact power feeding / communication unit 6 performs regular processing at predetermined time intervals, but before the response of the regular processing, the auxiliary function unit 9 supports the secondary-side non-contact power feeding / communication unit 10 to the auxiliary function unit.
- the serial transmission signal SD2 is received, the main function unit serial transmission signal SD2 is held until a response to the next periodic processing that occurs.
- the primary-side non-contact power supply / communication unit 6 transmits the main function unit parallel signal PD1 output from the main function unit 5 to the secondary-side non-contact power supply / communication unit 10.
- the operation in the primary side non-contact power feeding / communication unit 6 is as described above.
- the secondary-side non-contact power supply / communication unit 10 receives the main function unit parallel communication signal PD1 after the reception of the main function unit parallel communication signal PD1 output from the main function unit 5 and then passes the main function unit parallel communication signal PD1 to the auxiliary function unit 9. Output to the parallel input line. Further, the secondary side non-contact power feeding / communication unit 10 receives the auxiliary function unit parallel communication signal PD2 output from the auxiliary function unit 9 and the auxiliary function unit serial communication signal SD2 received from the auxiliary function unit 9 as primary side non-contact power feeding / The data is transmitted to the communication unit 6.
- the output of the main function unit parallel communication signal PD1 to the auxiliary function unit 9 and the output or transmission order of the auxiliary function unit parallel communication signal PD2 are either first or the same. It is good.
- the operation in the secondary side non-contact power feeding / communication unit 10 is as described above.
- the primary-side non-contact power supply / communication unit 6 receives the response including the auxiliary function unit parallel communication signal PD2 and the auxiliary function unit serial communication signal SD2 from the secondary side non-contact power supply / communication unit 10, and then receives the auxiliary function unit parallel communication.
- the communication signal PD2 is output to the parallel input signal line of the main function unit 5, and the auxiliary function unit serial communication signal SD2 is output to the serial input line of the main function unit 5.
- the serial communication signal is described as being transmitted only from either the main function unit 5 or the auxiliary function unit 9, but the main function unit 5 is not connected to the primary side non-contact power feeding / communication unit 6 and the secondary side
- the auxiliary function unit 9 may transmit the auxiliary function unit serial communication signal SD ⁇ b> 2 from the auxiliary function unit 9 to the main function unit 5 in response to receiving the serial communication signal transmitted to the contact power supply / communication unit 10.
- the primary side non-contact power supply / communication unit 6 is a master side device that leads communication
- the secondary side non-contact power supply / communication unit 10 is a slave side device.
- the non-contact power supply / communication unit 10 may be a master side device that leads communication.
- a plurality of signals are converted into one serial signal by the primary side signal combining / dividing unit 7c, and transmitted between the first communication coil 3Ca and the second communication coil 3Cb,
- transmission of a plurality of signals can be realized by a set of communication circuits (and coils).
- the wired part of the serial communication function by hardware flow control that has been performed by wire is connected to the primary side non-contact power feeding / communication unit 6, the first coil 3a, and the second coil 3b.
- Replacement with the secondary-side non-contact power supply / communication unit 10 allows non-contact power supply and communication to be realized without changing software such as a communication protocol in the main function unit 5 and the auxiliary function unit 9.
- Embodiment 9 As application examples of the configurations described in the first to eighth embodiments, an air conditioner indoor remote controller, an air conditioner outdoor unit control circuit board, an input / output device for household electrical appliances, and an input / output of a FA (Factory Automation) device The device is raised.
- FA Vectory Automation
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Abstract
Description
しかし、同文献で用いられているコイルの構造では、各コイルの大きさはそれぞれ1~3cm角で、厚さが5~10mmであり、より小型な電子機器へ適用するためには、更なるコイルの小型化・薄型化を行わなければならないという課題があった。
しかし、同文献に記載の技術は、フレキシブル基材17上に2種類のコイルアンテナを構成するものであり、電子回路基板間を無結線で接続するものではない。
しかし、信号線が同期的に変化するパラレル信号である場合は同技術の適用が容易であるものの、非同期で変化するパラレル信号、または非同期で変化するパラレル信号とシリアル信号、アナログ信号を合わせて信号伝送することは困難であった。
また、第1電子回路基板と第2電子回路基板の間に接点がないため、接続部の信頼性、経年劣化や環境による劣化耐力、および取り扱いやすさが向上する。
また、第1電子回路基板と第2電子回路基板の接続部の小型化・薄型化が可能となり、これらを搭載した電子機器の小型化が可能となる。
図1は、本発明の実施の形態1に係る電子機器1の構成図である。
図1において、電子機器1は複数の電子回路基板から構成されており、図1では第1電子回路基板2と第2電子回路基板4とから構成される。
第1電子回路基板2は電子機器1の主機能を実現するための電子回路基板であり、第2電子回路基板4は電子機器1の補助的機能を実現するための電子回路基板である。
第1電子回路基板2には第1コイル3aが、第2電子回路基板4には第2コイル3bがそれぞれ接続されている。以後、第1コイル3aと第2コイル3bを総称するときは、コイル3と呼ぶ。
このため、第1電子回路基板2から第2電子回路基板4への電力供給および第1電子回路基板2と第2電子回路基板4との間の信号の送受信については、電磁誘導により第1コイル3aおよび第2コイル3bを介して行われる。
主機能部5は、電子機器1の主機能を実現する。
一次側非接触給電・通信部6は、主機能部5および第1コイル3aと接続され、第2電子回路基板4への電力供給および第2電子回路基板4との間の通信信号の送受信のための機能を有する。
主機能部5と一次側非接触給電・通信部6とは、主機能部出力信号線13、主機能部入力信号線14、主機能部電源出力15で接続されている。
一次側通信回路7は、主機能部5と補助機能部9との間で送受信される通信信号を第1コイル3aと第2コイル3bを介して送受信するため、主機能部出力信号線13および主機能部入力信号線14を介して伝達される信号に応じて第1コイル3a電流に対する変復調処理を行う。
一次側電源回路8は、第1電子回路基板2から第2電子回路基板4への電力供給を行うための電力供給処理を行い、第1コイル3a電流の制御を行う。
また、主機能入力線14の例として、シリアル信号の入力となる主機能シリアル入力信号線14sとパラレル信号を入力する主機能パラレル入力信号線14pが挙げられる。
主機能出力信号線13および主機能入力信号線14には、シリアル信号およびパラレル信号のようなデジタル信号線ではなく、アナログ信号線を用いてもよい。
補助機能部9は、電子機器1の補助的な機能を実現する。
二次側非接触給電・通信部10は、補助機能部9および第2コイル3bと接続され、第1電子回路基板2から供給された電力を第2電子回路基板4へ電源として供給する機能、および第1電子回路基板2との通信信号の送受信のための機能を有する。
補助機能部9と二次側非接触給電・通信部10とは、補助機能部入力信号線16、補助機能部出力信号線17、補助機能部電源入力18で接続されている。
二次側通信回路11は、主機能部5と補助機能部9との間で送受信される通信信号を第1コイル3aと第2コイル3bを介して送受信するため、補助機能部入力信号線16および補助機能部出力信号線17を介して伝達される信号に応じて第2コイル3b電流に対する変復調処理を行う。
二次側電源回路12は、第1電子回路基板2より給電された電力を受け、第2電子回路基板4の電源として供給する。
ここで、補助機能入力信号線16および補助機能出力信号線17には、シリアル信号およびパラレル信号のようなデジタル信号線ではなく、アナログ信号線を用いてもよい。
コイル3は、フレキシブル基材21とフレキシブル基材21上に固定された銅箔などによる回路パターン22からなるフレキシブル基板で構成されたコイルであり、全体的な構成として、コイル部23、接続部24、および接続端子部25からなる。
回路パターン22は、表面の回路パターン22aと裏面の回路パターン22bからなる。また、回路パターン22aと回路パターン22bはスルーホール26により接続されている。
また、コイル面中心部のコイルパターンのない領域の面積が大きいほどコイル同士を対向させた際の中心位置からのずれに対して性能の低下が抑制できる。
対向させた際にお互いのコイルにおいて、コイル面中心部のコイルパターンのない部分の重なる面積が大きいほど、コイル間の結合度は高くなる。
図4に示すように、第1コイル3aと第2コイル3bは、対向させて配置させる。このとき、各コイルはコイル間ギャップ30の間隔があけられた状態で配置される。
コイル間ギャップ30は、第1電子回路基板2と第2電子回路基板4との取り付け状態により変化する。
たとえば、樹脂ケースなどにより第1電子回路基板2と第2電子回路基板4とが覆われている場合、樹脂ケースの厚み分のギャップが発生する。また、樹脂ケースのようなものが不要な場合は、第1コイル3aと第2コイル3bとがほぼ密着状態で配置される。
磁性体31は、第1コイル3aと第2コイル3bのそれぞれについて、コイル同士の対向面と反対側の面に取り付けられている。
磁性体31を設けることにより、第1コイル3aと第2コイル3bとの間の結合度の向上、コイル3からの磁束の漏れの抑制による付近の回路への悪影響の抑制を図ることができる。しかし、これらの対策が不要であれば設ける必要はない。
磁性体31のサイズは、磁性体31によりコイルより発生する磁束の集中を促し、漏れ磁束を削減するためにも、フレキシブル基板コイルの最も外周を通るコイル巻線パターン部より大きくするとよい。
磁性体31の厚みについては、用いるコイルから発生する磁束の磁束飽和に対して余裕の得られる厚みとすることが望ましい。フレキシブル基板コイルの薄さを生かすためにも0.5m以下の厚みとするとよい。
次に、本実施の形態1に係る電子機器1の動作を、下記ステップ(1)~(11)で説明する。
(2)第1コイル3aに電流が流れることにより、第2コイル3bに電磁誘導による電流が発生する。
これにより、第2電子回路基板4の補助機能部9および二次側非接触給電・通信部10が動作する。
(5)第1コイル3aに電流が流れることにより、第2コイル3bに電磁誘導による電流が発生する。
重畳させるには、電力供給電流と異なる周波数を用いる手段や、電力給電用電流の振幅を変える手段などを用いることができる。
(7)第2電子回路基板4の二次側非接触給電・通信部10の二次側通信回路11では、第2コイル3bに流れる電流から通信信号成分を取り出し復調を行い、第1電子回路基板2の主機能部5からの受信情報として、補助機能部9へその受信情報を渡す。
(9)第2コイル3bに電流が流れることにより、第1コイル3aに電磁誘導による電流が発生する。
重畳させるには、電力供給電流と異なる周波数を用いる手段や、受電側の負荷あるいは共振周波数を変化させることによる第1コイル3aに生じる電流の変化(負荷変調)に通信信号を重畳させる手段を用いることができる。
(11)第1電子回路基板2の一次側非接触給電・通信部6の一次側通信回路7では、第1コイル3aに流れる電流から通信信号成分を取り出し復調を行い、第2電子回路基板4の補助機能部9からの受信情報として、補助機能部9へその受信情報を渡す。
次に、図1の構成の適用例を説明する。
(a)電子機器1の主機能部5に対して、補助機能部9を主機能部5と絶縁する用途
(b)補助機能部9を主機能部5から着脱する用途
(c)着脱とともに複数の補助機能を用途に応じて交換する用途
空気調和機のリモコンは、空気調和機の室内機と接続され、空気調和機の操作を行う。この機能は、当該リモコンの主機能部5に対応する。
リモコンは、空気調和機の操作を行う機能以外に、補助機能として、空気調和機の管理する情報をリモコン外部と入出力を行う機能を有する。この、リモコン外部と入出力する補助機能は、第2電子回路基板4上の補助機能部9が受け持つ。
必要に応じて、補助機能を切り替えることを可能とするため、第2電子回路基板4としてLANインターフェース基板およびUSBインターフェース基板を用意し、交換可能とする。
このような場合に、人が触れる可能性のある端子部に絶縁破壊による交流電源電圧がそのまま印加されると、端子部に触れた人が感電する等の危険性がある。
図1の構成を採用すると、リモコンの電子回路基板とインターフェースの電子回路基板は有線接続されておらず、電磁誘導作用を用いて電気的に接続されているので、両者の間は絶縁されており、端子部を人が触れても感電等するおそれがない、という利点がある。
次に、空気調和機の室外機の制御基板に図1の構成を採用した例を説明する。
図1の構成では、第1電子回路基板2と第2電子回路基板4とは電子機器1の内部に構成されるものとしたが、第2電子回路基板4は必ずしも電子機器1の内部にある必要はない。
第1電子回路基板を空気調和機の室外機制御基板、第2電子回路基板4を空気調和機のメンテナンス用回路基板であるものと仮定する。
ところが、空気調和機の室外機は屋外に設置されており、温度変化や直射日光、風雨などの影響を受ける環境にあるため、上述の接点端子は環境の影響を受けて劣化する可能性が高い。
本実施の形態1に係る電子機器1を適用すると、空気調和機の室外機制御基盤とメンテナンス用回路基板とを電気的な結線で接続する必要がないため、上述の接点端子が劣化しても、電気的な接続にはあまり影響が生じない。これにより、室外機制御基板の環境劣化耐力を向上することができる。
これにより、第1電子回路基板2と第2電子回路基板4間の絶縁を行うことが可能となる。
さらには、第1電子回路基板2と第2電子回路基板4との接続部の取り扱いが容易となり、第1電子回路基板2と第2電子回路基板4の着脱も容易となる。
また、フレキシブル基板は薄く、曲げることも可能であるため、コイルの配置位置の自由度が向上し、取り扱いが容易になる。
また、コイル3の厚みを薄くすることができ、対向する第1コイル3aと第2コイル3bの対抗面と逆の面に磁性体を設けることで、磁束の漏れによる周辺回路への影響の抑制を向上することが可能となるとともに、第1コイル3aと第2コイル3b間の結合度を向上することが可能となる。
実施の形態1では、通信に用いるコイル3と電力の送受電に用いるコイル3とを共用とした。したがって、実施の形態1では、第1電子回路基板2に接続されるコイル3は第1コイル3aのみであり、また第2電子回路基板4に接続されるコイル3は第2コイル3bのみであった。
本発明の実施の形態2では、コイル3を電力送受電用と通信用とに分けて構成した例を説明する。
この場合、実施の形態1に説明したように、通信用コイルと電力用コイルを共用化することが可能である。
したがって、同一コイルで上述の双方の要求を実現することが困難となる。
そこで、本実施の形態2では、通信速度の向上と電力供給量向上の両立のため、コイル3を通信用コイルと電力用コイルとして分割して用いる構成とした。ここでの通信速度は240kbps以上、給電電力は1W以上を想定する。
図5において、第1電子回路基板2には、一次側非接触給電・通信部6の一次側通信回路7に第1通信用コイル3Caが接続され、一次側電源回路8に第1電力用コイル3Paが接続される。
同様に第2電子回路基板4には、二次側非接触給電・通信部10の二次側通信回路11に第2通信用コイル3Cbが接続され、二次側電源回路12には、第2電力用コイル3Pbが接続される。
各コイルは、第1通信用コイル3Caと第2通信用コイル3Cbとが対向し、第1電力用コイル3Paと第2電力用コイル3Pbとが対向する構成となる。
コイルの巻線数などの仕様は、通信用コイル3Caと3Cb、電力用コイル3Paと3Pbで同一とせず、それぞれの性能を得るために仕様を変えることも可能である。また、対向する第1コイルと第2コイルを同一仕様のコイルとせず、巻線数などの仕様を変えてもよい。
図6において、25Caは第1通信用コイル3Caの接続端子、25Cbは第2通信用コイル3Cbの接続端子、25Paは第1電力用コイル3Paの接続端子、25Pbは第2電力用コイル3Pbの接続端子である。
上部磁性体31a、下部磁性体31bは、コイル全体を挟み込む形で配置され、中部磁性体31cは、通信用コイルと電力用コイルを分離する形で配置される。
30は、通信用コイルと電力用コイルそれぞれにおける第1コイルと第2コイル間のギャップを示す。
また、ギャップ30を介して中部磁性体31cを挟み込む形で、上側に第1通信用コイル3Ca、下側に第1電力用コイル3Paが配置される。さらに、第1通信用コイル3Caの外側に上部磁性体31a、第1電力用コイル3Paの下側に下部磁性体31bを配置する。
このように、フレキシブル基板コイルの面方向に各コイルを重ねて配置する。
図6の構成では、周波数や電流値などの使用条件により通信用コイル3Ca、3Cbと電力用コイル3Pa、3Pbとが互いに干渉し合い、それぞれの性能を低下させる場合もある。そのような場合は、図7に示す構成で干渉を抑えることができる。
そこで図7のように、中部磁性体31cを中部磁性体31dと中部磁性体31eの二つに分け、その間に磁気遮蔽材32をはさむことで、通信用コイル3Ca、3Cbと電力用コイル3Pa、3Pb間の磁束を遮断し、お互いの干渉を抑制する。
アルミニウムは、直流磁場においては非磁性体であり、コイルの出力する磁束に影響を与えないが、交流磁場においては反磁性体となり、コイルから発生する磁束を打ち消す方向に磁束が発生する。
この作用により、磁気遮蔽材32の逆面に対して、磁束が透過し、コイル間での干渉を抑制することが可能となる。
図5~図7において、通信用コイルと電力用コイルを分割した構成例を示したが、コイルを通信用と電力用とで分ける方法として、図8に示すようなコイルを用いることも可能である。
図8に示すコイルは、図2や図3と同様にフレキシブル基板で構成されるコイルであるが、中間タップ27を用いて1つの巻線を複数に分割することで1つのコイルを複数のコイルとして用いる。
ただし、通信用コイルと電力用コイルを分離する方法と比較し、互いの干渉を抑制する効果は低下する。
また、第1電子回路基板2と第2電子回路基板4に接続するコイル3をフレキシブル基板で構成したため、実施の形態1と同様の効果を発揮することができる。
これにより、これらを搭載する電子機器の小型化が可能となる。
これにより、コイル体積の増加が抑制でき、コイルを共用した構成のような1組のコイルを用いた場合と同等の取り扱いやすさを得ることが可能となる。
また、複数のコイルを用いる場合と比較し、対向するコイルの位置決めが1つのコイルだけで実現でき、コイル性能の信頼性を高めることが可能となる。
また、互いのコイルを分離する中部磁性体31cを共用化することで、磁性体の数を減らすことが可能となり、これらを搭載する電子機器の小型化、低コスト化が可能となる。
これにより、コイルを共用化した際と同等の取り扱い易さを得ることが可能となる。
本発明の実施の形態3では、フレキシブル基板コイルの特徴を利用し、複数のコイルを重ねて直列接続することにより、コイル巻線の巻き数(コイルのインダクタンス値)を調整する構成を説明する。
なお、後述の図9で説明するコイル3以外の構成は、実施の形態1~2と同様であるため、説明を省略する。
通信用途では、第1コイルと第2コイル間で電磁誘導により供給する電力は数mWオーダの電力でよいが、電力用途では、第2電子回路基板4を動作させるために数百mWから数W以上の電力を供給する必要がある。
このため電力用コイルの用途では、通信用コイルと比較し100~1000倍以上の電力送電を行う必要がある。
大電力を送るために、コイル仕様として、電力用コイル巻線の巻き数は通信用コイル巻線の巻き数より多くする必要がある。通信用コイルと電力用コイルの巻き数比は、通信用1に対して電力用4以上が必要となる。
たとえば、240kbps(bit/s)の通信速度を必要とする場合、通信用に用いる搬送波の周波数は通信速度の10倍程度の2.4MHzとすればよい。また、たとえば240Mbpsの通信速度を実現する場合は、通信用に用いる搬送波の周波数は2.4GHzなどとすればよい。
このため、電力用コイルに流れる電流は通信と比較し低周波数とし、また、電磁誘導の効果を高めるためコイルのインダクタンスも高くする、つまりコイル巻線の巻き数を多くする必要がある。
次に、本実施の形態3に係るコイル3の構成を説明する。
このため巻き数を同じとした場合に、同一サイズで巻線をボビンに巻いて構成したコイルと比較し、インダクタンスが低くなり、コイル性能が低くなるが、巻線コイルと比較し厚みは薄くすることができる。
これを利用し、フレキシブル基板コイルでは、後述の図9のように複数のコイルを用いてコイル同士を直列接続し重ねて用いることで、コイルの巻線の数(コイルのインダクタンス値)を調整できる。
また、フレキシブル基板コイルでは重ねても急激にコイルの厚みが増加するわけではないので、磁性体の配置もコイル1枚の際と同様にコイルの対抗面の反対面に配置することで対応できる。
図9において、第1コイル3aは二枚のコイル3a-1、3a-2から構成され、第1コイル3aに備えられている各コイルの接続端子25a-1、25a-2を各コイルが直列接続となるように接続する。
同様に、第2コイル3bは二枚のコイル3b-1、3b-2から構成され、第2コイル3bに備えられている各コイルの接続端子25b-1、25b-2を各コイルが直列接続となる用に接続する。
同様に、第2コイル3bについてもコイル3b-1とコイル3b-2の組み合わせを要求仕様にあわせて変更することができる。
異なる仕様のコイルを複数作るよりも、1種類の仕様のコイルだけ用いるほうが、コイル一枚あたりのコストを低減できることから、通信用コイルと電力用コイルの仕様は同一とし、電力用のコイルは直列数を増やすことで必要なコイル巻線の巻き数(コイルのインダクタンス値)を得る。
また、フレキシブル基板で構成されるコイルであれば厚みは50μm以下であるため、複数枚重ねても、電子回路基板の厚みよりも薄くすることが可能である。
このような場合は、第1電力用コイル3Paよりも第2電力用コイル3Pbの巻き数を多くするとよい。
そのため、直列接続したコイルは重ね合わせることが可能であり、重ねるとともに対向面の反対面への磁性体配置もコイル1枚の際と同様に行うことができる。
これにより、様々な仕様のコイルの構成を容易とするとともに、コイルの小型化、薄型化が可能となる。
これにより、コイル作成に必要なコストの低減が可能となり、これを用いる電子機器のコストの上昇を抑制することができる。
したがって、通信用と電力用それぞれの用途に適した搬送波周波数を用いることが容易である。
本発明の実施の形態4では、フレキシブル基板コイルの特徴を利用し、複数のコイルを重ねて直列接続することにより、コイル巻線の断面積(電流容量)を調整する構成を説明する。
なお、後述の図10で説明するコイル3以外の構成は、実施の形態1~2と同様であるため、説明を省略する。
多層基板のフレキシブル基板により回路を構成すれば構成可能な分だけの並列回路を構成することが可能となるが、並列パターンを構成する層は同一コイル巻線と同じであるため、コイルの面積を一定と仮定した場合、並列パターンを用いない場合と比較し、一枚のコイルに構成可能なコイルの巻き数が減ることになる。
図10において、第1コイル3aは二枚のコイル3a-1、3a-2から構成され、第1コイル3aに備えられている各コイルの接続端子25a-1、25a-2を各コイルが並列接続となるように接続する。
同様に、第2コイル3bは二枚のコイル3b-1、3b-2から構成され、第2コイル3bに備えられている各コイルの接続端子25b-1、25b-2を各コイルが直列接続となるように接続する。
第2コイル3bについても第1コイル3a-1とコイル3a-2と同様に構成する。
図10において、並列化された各コイルの接続端子は、第1コイル接続端子33a、第2コイル接続端子33bに集約される。
通信用コイルのサイズと電力用コイルのサイズを異なるサイズとして構成することも可能であるが、それぞれ異なる仕様のコイルが必要となるとともに、電子機器1内部にこれらコイルを配置する際に、通信用コイルと電力用コイルの大きさの違いが配置位置や配置手段に影響を与えるため、通信用コイルと電力用コイルのサイズは同じほうがよい。
コイル巻線の巻き数の増加には、実施の形態3で説明したように、コイルの直列接続を行えばよい。
実施の形態3で説明したフレキシブル基板コイルの直列接続と、実施の形態4で説明したフレキシブル基板コイルの並列接続を組み合わせることで、コイル巻線の巻き数(インダクタンス)やコイル巻線の断面積(電流容量)を変えることができる。
同一仕様のコイルを4枚用い、2枚を直列接続したものを2組構成し、それらを並列に接続する。これにより基本の1枚のコイルと比較し、コイル巻線の巻き数が2倍で、コイル巻線の断面積(電流容量)が2倍としたコイルを構成することができる。
この4枚のコイルを重ね合わせ、図4と同様にコイルの一方の面に磁性体31を配置することで、第1あるいは第2コイルを構成することができる。
よって、基本的な仕様のコイルを数点用意しておけば、並列数の変更により、種々のコイル仕様に対応可能となる。
そのため、並列接続したコイルは重ね合わせることが可能であり、重ねるとともに対向面の反対面への磁性体配置もコイル1枚の際と同様に行うことができる。
これにより、様々な仕様のコイルの構成を容易とするとともに、コイルの小型化、薄型化が可能となる。
これにより、コイル作成に必要なコストの低減が可能となり、これを用いる電子機器のコストの上昇を抑制することができる。
図11は、本発明の実施の形態5に係る電子機器1の構成図である。同図は、電子機器1の内部における第1電子回路基板2、第2電子回路基板4、第1コイル3a、第2コイル3bの配置例を示す。
第1電子回路基板2は、電子機器1の主機能を実現する回路であり、一次側回路部品34a、一次側コイル接続部35a、一次側コイル接続部35aに接続された第1コイル3a、第1コイル3aの一方の面に配置された磁性体31aを備える。
第2電子回路基板4は、電子機器1の補助機能を実現する回路であり、二次側回路部品34b、二次側コイル接続部35b、二次側コイル接続部35bに接続された第2コイル3b、第2コイル3bの一方の面に配置された磁性体31bを備える。
第2コイル3bはフレキシブル基板で構成されるため、第2コイル3bの接続端子部24b部を曲げることで、第2電子回路基板4の二次側回路部品34bの実装面と反対の面に固定している。
また、第1電子回路基板2に接続された第1コイル3aも同様にフレキシブル基板で構成されるため、第2電子回路基板4の下面と電子機器1のケースの間(図示せず)などの狭い空間に配置することができる。
図11の例では、第2電子回路基板4に第2コイル3bを固定する例について示したが、第1電子回路基板2に第1コイル3aを固定してもよい。
また、一方のコイルを電子回路基板に固定することで、第1電子回路基板2と第2電子回路基板4の配置や固定が容易となり、取り扱いが簡単になる。
図12は、本発明の実施の形態6に係る電子機器1の構成図である。図12における各構成要素は、配置手法を除いて図11と同様であるため、同様の符号を付して説明を省略する。
第1コイル3aはフレキシブル基板で構成されるため、第1コイル3aの接続端子部24aを曲げることで、第1電子回路基板2の一次側回路部品34aの実装面と反対の面に固定している。
同様に、第2電子回路基板4において、二次側回路部品34bの実装されていない面に磁性体31bが固定され、磁性体31bの電子回路基板と反対面に第2コイル3bが固定されている。
第2コイル3bはフレキシブル基板で構成されるため、第2コイル3bの接続端子部24bを曲げることで、第2電子回路基板4の二次側回路部品34bの実装面と反対の面に固定している。
以上のように構成された第1電子回路基板2と第2電子回路基板4は、各コイルが対向するように配置される。第1電子回路基板2と第2電子回路基板4は、電子機器1のケース(図示せず)などによりそれぞれ固定される。
図13は、本発明の実施の形態7に係る電子機器1の構成図である。同図は、電子機器1の内部における第1電子回路基板2、第2電子回路基板4、第1通信用コイル3Ca、第1電力用コイル3Pa、第2通信用コイル3Cb、第2電力用コイル3Pbの配置例を示す。
図13の第2通信用コイル3Cbと第2電力用コイル3Pbと磁性体31の構成は、実施の形態2の図6で示した構成と同様である。図7で示した構成としてもよい。
これらの構成の詳細については実施の形態2と同様であるため、説明は省略する。
これにより、第1通信用コイル3Caと第1電力用コイル3Paとは対向する状態でコイル固定手段36に固定される。
このとき、対向する第1通信用コイル3Caと第1電力用コイル3Paとの間にはギャップが形成され、ここに第2通信用コイル3Cbと第2電力用コイル3Pbとそれらが挟み込む磁性体31から構成される第2電子回路基板4に接続されたコイルを挿入する。
このとき、第1通信用コイル3Caと第2通信用コイル3Cbとが対向し、第1電力用コイル3Paと第2電力用コイル3Pbとが対向するように配置される。
コイルから発生する磁束による電子回路基板への誤動作等の影響の抑制や、コイルの近傍にある金属による電力給電性能、通信性能の低下をふせぐために、コイルの一方の面に配置された磁性体31のコイルと反対の面に磁気シールドを配置してもよい。
また、各コイルをフレキシブル基板で構成したため、コイル固定に要する空間を削減することが可能となり、これにより電子機器1の小型化、薄型化、低コスト化を実現することができる。
また、一方のコイルを他方のコイルで挟み込み、固定することで、第1電子回路基板2と第2電子回路基板4の配置や固定が容易となり、取り扱いが簡単になる。
以上の実施の形態1~7では、第1電子回路基板2と第2電子回路基板4の周辺構成を中心に説明した。本発明の実施の形態8では、両基板間の通信や電力送受電に係る具体的な動作例を説明する。
なお、以下の説明では、各部の構成は実施の形態2のように通信用コイルと電力用コイルが分離している構成を例にするが、両者が共用化されている場合でも、原則的な動作は同様であることを付言しておく。
図14において、一次側電源回路8は、電源供給部40、一次側平滑手段41、交流変換手段42、一次側共振用コンデンサ43を備える。
二次側電源回路12は、二次側共振用コンデンサ44、整流手段45、二次側平滑手段46、電圧変換手段47、二次側電圧出力部48を備える。
一次側平滑手段41は、電界コンデンサより構成される。
交流変換手段42は、トランジスタやMOSFET、IGBTなどのブリッジ状に構成されたスイッチング素子と、各スイッチング素子をオン/オフ制御するスイッチング素子制御手段42eから構成される。42a、42b、42c、42dはそれぞれスイッチング素子を示す。
交流変換手段42は、フルブリッジ回路構成としているが、ハーフブリッジ回路構成としてもよい。また、各スイッチング素子42a~42dは、スイッチング素子制御手段42e(図示せず)によりオン/オフ制御される。
整流手段45は、ダイオードなどにより構成される。図9では半波整流回路方式について記載しているが、全波整流回路方式を用いてもよい。
二次側平滑手段46は、コンデンサ46aまたは電界コンデンサ46bで構成される。
電圧変換手段47は、レギュレータ47a、コンデンサ47b、電界コンデンサ47cで構成される。
(2)このとき、交流変換手段42では、第1電力用コイル3Paと一次側共振コンデンサ43、第2電力用コイル3Pbと二次側共振コンデンサ44に共振が生じる周波数を出力する。
(4)このとき二次側非接触給電・通信部10では二次側電源回路8において、第2電力用コイル3Pbに得られた交流電力を整流手段45により整流し、二次側平滑手段46により平滑化することで直流電力に変換する。
図14では、第1電力用コイル3Paと一次側共振コンデンサ43とは直列接続構成としているが、用いる回路構成に応じて並列接続としてもよい。同様に、第2電力用コイル3Pbと二次側共振用コンデンサ44は並列接続としているが、用いる回路構成に応じて直列接続としてもよい。
図15において、一次側通信回路7は、一次側変調回路7a、一次側復調回路7b、一次側信号合成・分割手段7c、一次側通信用共振コンデンサ50を備える。
一次側通信回路7は、第1通信用コイル3Caおよび主機能部5と接続される。主機能部5が出力する送信信号は主機能信号出力線13を介して一次側通信回路7へ入力され、主機能部5に入力する受信信号は主機能信号入力線14から出力される。
一次側変調回路7aと一次側信号合成・分割手段7cとは一次側送信信号入力51と接続され、一次側復調回路7bと一次側信号合成・分割手段7cとは一次側受信信号出力58とで接続される。
一次側電源59は、主機能部電源出力15より得られる電源である。
主機能部出力信号線13が1つである場合は、信号の合成は不要であるため、主機能部信号出力13と一次側送信信号入力51とを直接接続してもよい。
また、主機能部入力信号線14が1つである場合は、信号の分割は不要であるため、主機能部入力信号線14は一次側受信信号出力58と直接接続してもよい。
一次側信号合成・分割手段7cが必要ない場合は、省略してもよい。
一次側復調回路7b(一次側復調手段55と一次側信号増幅手段56と一次側バッファ手段57)は、第1電子回路基板2が第2電子回路基板4から通信信号を受信する時に用いられる。
二次側通信回路11は、第2通信用コイル3Cbおよび補助機能部9に接続される。補助機能部9が出力する送信信号は補助機能信号出力線17を介して二次側通信回路11へ入力され、補助機能部9に入力する受信信号は補助機能信号入力線16から出力される。
二次側変調回路11aと二次側信号合成・分割手段11cとは二次側送信信号入力61と接続され、二次側復調回路11bと二次側信号合成・分割手段11cとは二次側受信信号出力68と接続される。
二次側電源69は、補助機能部電源入力18より得られる電源である。
補助機能部出力信号線17が1つである場合は、信号の合成は不要であるため、補助機能部信号出力17と二次側送信信号入力とを直接接続してもよい。
また、補助機能部入力信号線16が1つである場合は、信号の分割は不要であるため、補助機能部入力信号線16は二次側受信信号出力68と直接接続してもよい。
二次側信号合成・分割手段11cが必要ない場合は、省略してもよい。
二次側復調回路11b(二次側復調手段65と二次側信号増幅手段66と二次側バッファ手段67)は、第2電子回路基板4が第1電子回路基板2から通信信号を受信する時に用いられる。
なお、図15では、一次側通信回路7と二次側通信回路11の構成が対称となる構成例について示した。また、変調方式はASK(Amplitude Shift Keying)方式を用いるものとした。
一次側変調手段53は、一次搬送波発生手段52から得られる搬送波と、一次側送信信号入力51から得られる送信信号とから、電磁誘導により通信を行う際の通信信号を生成する。図15に示した例では、AND回路により構成されている。
一次側信号増幅手段56は、復調された信号を増幅する。図15に示した例では、オペアンプを用いた増幅回路としている。
一次側バッファ手段57は、受信した通信信号をデジタル信号として安定化させる。
図16において、一次側通信回路7の内部に構成される、一次側変調回路7aと一次側復調回路7bは、図15で説明したものと同様であるため説明を省略する。
シリアルデータ受信手段74は、コイル送信データバッファ76と接続される。シリアルデータ受信手段74は、受信したシリアルデータをコイル送信データバッファ76の所定の領域に格納する。
主機能部パラレル出力信号線13pは、データエンコーダ部75と接続される。データエンコーダ部75は、主機能部パラレル出力信号線13pから入力されたデータの読み込みを行う。
このとき、データエンコーダ部75は、主機能部パラレル出力信号線13pから入力されたデータを単純にパラレルデータからシリアルデータに変換してもよい。また、データの圧縮、冗長性の付与などデータ変換処理を行い、変換後のデータをコイル送信データバッファ76に格納してもよい。
コイル送信部77は、コイル送信データバッファ76に格納されたデータを、一次側通信回路7と二次側通信回路11との間で通信を行うために決められた所定の通信速度に応じた周期で、一次側送信信号入力51を介して接続された変調回路7aに出力する。
変調回路7aは、第1通信用コイル3Caと接続され、コイル送信部77から出力された信号に変調をかけるとともに、第1通信用コイル3Caに流す電流の制御を行う。
また、コイル受信部78は、コイル受信データバッファ79と接続され、サンプリングしたデータをコイル受信データバッファ79に順次格納する。
コイル受信データバッファ79は、シリアルデータ送信手段80とデータデコーダ部81と接続される。
このとき、データデコーダ部81は、コイル受信データバッファ79に格納されたデータの所定領域のデータを主機能部パラレル入力信号性14pに単純に出力してもよい。あるいは、コイル受信データバッファ79に格納されたデータの所定領域のデータに対し、データの伸張、冗長性の削除などデータ変換処理を行い、変換後のデータを主機能部パラレル入力線14pに出力してもよい。
タイマ73は、一次側信号合成・分割手段7cにおける時間管理を行う。
タイマ73は、データエンコーダ部75、データデコーダ部81、コイル送信部77、コイル受信部78と接続される。
タイマ73は、データエンコーダ部75に対して、主機能部パラレル出力線13pの信号の読込タイミング、データ変換タイミング、コイル送信データバッファ76への格納タイミング等を通知する。
また、データデコーダ部81に対して、コイル受信データバッファ79からの読込タイミング、データ変換タイミング、主機能パラレル入力線14pの出力信号の更新タイミング等を通知する。
また、コイル送信部77に対して、一次側通信回路7と二次側通信回路11との間での通信を行う際の送信タイミングの時間管理を行い送信タイミングの通知を行う。
また、コイル受信部78に対して、一次側通信回路7と二次側通信回路11との間での通信を行う際に受信の次の処理を行うための時間管理を行い、受信完了等の受信動作イベントのタイミングをコイル受信部78から受け取る。
(2)シリアルデータ受信手段74は、主機能部シリアル出力線13sに出力されたシリアルデータを受信し、コイル送信データバッファ76の所定領域に格納する。
(4)主機能部シリアル出力線13sと主機能部パラレル出力線13pから出力されたデータが1つのデータとして、コイル送信データバッファ76に格納される。
(6)変調回路7aは、一次側送信信号入力51から1/0あるいはHigh/Lowで示される通信信号を一次側非接触給電・通信部6に出力する。
(8)変調信号により一次側電流制御手段54のトランジスタがオン/オフ動作し、これにより、一次側電源59から第1通信用コイル3Caに流れる電流が制御される。
(10)第2通信用コイル3Cbに誘起された電力から、二次側復調手段65により搬送波成分が除去され、通信信号が復調される。
(12)安定化された信号は、二次側受信信号出力68より出力され、補助機能部9に取り込まれる。
このときは、シリアル信号とパラレル信号の数に応じて、シリアル受信手段74およびデータエンコーダ部75の数を増やせばよい。
また、主機能部5と補助機能部9との間の通信以外に、一次側非接触給電・通信部6と二次側非接触給電・通信部10との間での情報交換を行う場合も考えられるが、このような場合は、コイル送信データバッファ76およびコイル受信データバッファ78に一次側非接触給電・通信部6と二次側非接触給電・通信部10との間での情報交換を行うデータ領域を設けるとよい。
たとえば、主機能部5と一次側通信回路7との間および補助機能部9と二次側通信回路11との間の通信速度を9600bpsとした場合、一次側通信回路7と二次側通信回路9との間の通信速度を240kbpsと25倍とすれば、一次側通信回路7と二次側通信回路11とで処理にかかるオーバヘッドの影響を少なくすることができる。
そのため、一次側信号合成・分割手段7cあるいは二次側信号合成・分割手段11cでの信号の合成、分割処理を行わず、主機能部出力信号線13を直接一次信号入力部51に接続し、補助機能部出力信号線17を二次側送信信号入力61に接続してもよい。
同様に、主機能部入力信号線14を一次側受信信号出力58に接続し、補助機能部入力線16を二次側受信信号出力68に接続してもよい。
このとき、主機能部5と一次側通信回路7との間および補助機能部9と二次側通信回路11との間の通信速度と、一次側通信回路7と二次側通信回路11との間の通信速度を同じとしてよい。
一次側非接触給電・通信部6と二次側非接触給電・通信部10とは無結線であり、上記に説明したように、コイル3を介して通信信号の伝達が行われる。
まず、通常時つまり、主機能部5から補助機能部9への主機能部シリアル通信信号SD1および補助機能部9から主機能部5への主機能部シリアル通信信号SD2がない場合について説明する。
一次側非接触給電・通信部6は、所定時間間隔で定期処理を行う。このとき、一次側非接触給電・通信部6は、主機能部5の出力する主機能部パラレル信号PD1を二次側非接触給電・通信部10に伝送する。一次側非接触給電・通信部6内の動作については前述した通りである。
また、二次側非接触給電・通信部10は、補助機能部9の出力する補助機能部パラレル通信信号PD2を一次側非接触給電・通信部6に伝送する。
ここで、二次側非接触給電・通信部6において、主機能部パラレル通信信号PD1の補助機能部9への出力と補助機能部パラレル通信信号PD2の出力あるいは伝送の順序はいずれが先あるいは同じとしてもよい。二次側非接触給電・通信部10内の動作については前述した通りである。
次に、主機能部5から補助機能部9への主機能部シリアル通信信号SD1がある場合について説明する。
一次側非接触給電・通信部6は、所定時間間隔で定期処理を行うが、定期処理よりも前に主機能部5から一次側非接触給電・通信部6に対して主機能部シリアル送信信号SD1を受信した場合、次に発生する定期処理まで主機能部シリアル送信信号SD1は保持される。
定期処理時に、一次側非接触給電・通信部6は、主機能部5の出力する主機能部パラレル信号PD1および主機能部シリアルデータSD1を二次側非接触給電・通信部10に伝送する。一次側非接触給電・通信部6内の動作については前述した通りである。
また、主機能部シリアル通信信号SD1を補助機能部9のシリアル入力線へ出力する。
また、二次側非接触給電・通信部10は、補助機能部9の出力する補助機能部パラレル通信信号PD2を一次側非接触給電・通信部6に伝送する。
ここで、二次側非接触給電・通信部6において、主機能部パラレル通信信号PD1の補助機能部9への出力と主機能部シリアル通信信号SD1の補助機能部9への出力と補助機能部パラレル通信信号PD2の出力あるいは伝送の順序はいずれが先あるいは同じとしてもよい。二次側非接触給電・通信部10内の動作については前述した通りである。
次に、補助機能部9から主機能部5への補助機能部シリアル通信信号SD2がある場合について説明する。
一次側非接触給電・通信部6は、所定時間間隔で定期処理を行うが、定期処理の応答よりも前に補助機能部9から二次側非接触給電・通信部10に対して補助機能部シリアル送信信号SD2を受信した場合、次に発生する定期処理に対する応答まで主機能部シリアル送信信号SD2は保持される。
定期処理時に、一次側非接触給電・通信部6は主機能部5の出力する主機能部パラレル信号PD1を二次側非接触給電・通信部10に伝送する。一次側非接触給電・通信部6内の動作については前述した通りである。
また、二次側非接触給電・通信部10は、補助機能部9の出力する補助機能部パラレル通信信号PD2および補助機能部9より受信した補助機能部シリアル通信信号SD2を一次側非接触給電・通信部6に伝送する。
ここで、二次側非接触給電・通信部6において、主機能部パラレル通信信号PD1の補助機能部9への出力と補助機能部パラレル通信信号PD2の出力あるいは伝送の順序はいずれが先あるいは同じとしてもよい。二次側非接触給電・通信部10内の動作については前述した通りである。
また、定期処理に関して、一次側非接触給電・通信部6を通信の主導となるマスタ側の機器とし、二次側非接触給電・通信部10をスレーブ側機器としたが、逆に二次側非接触給電・通信部10を通信の主導となるマスタ側機器としてもよい。
次に、本実施の形態8の構成による効果を説明する。
このとき、通信に用いる回路やコイルの数を増やす手段や、周波数を分けるなどの手段により複数の信号を伝達しあう手段が考えられるが、回路やコイルの数の増加や、周波数多重化による回路規模の増大などが課題となる。
これにより回路規模の増大が抑制でき、機器の小型化が実現できる。
実施の形態1~8で説明した構成の適用例として、空気調和機の室内リモコン、空気調和機の室外機制御回路基板、家庭用電化機器における入出力装置やFA(Factory Automation)機器の入出力装置が上げられる。
Claims (30)
- 第1電子回路基板と、
第2電子回路基板と、
前記第1電子回路基板に接続された第1コイルと、
前記第2電子回路基板に接続された第2コイルと、
を備え、
前記第1コイルから前記第2コイルへ電磁誘導により電力を送電することで、
前記第1電子回路基板と前記第2電子回路基板の間を電気的に接続する
ことを特徴とする電子機器。 - 前記第1コイルと前記第2コイルはフレキシブル基板を用いて構成されている
ことを特徴とする請求項1記載の電子機器。 - 前記第1コイルまたは前記第2コイルのコイル面の一方に磁性体を配置した
ことを特徴とする請求項1または請求項2記載の電子機器。 - 前記第1コイルと前記第2コイルを、
前記磁性体を配設していない面で対向するように配置した
ことを特徴とする請求項3記載の電子機器。 - 前記第1コイルは、
前記第1電子回路基板から前記第2電子回路基板へ電力を送電するための第1電力用コイルと、
前記第1電子回路基板と前記第2電子回路基板の間で通信を行うための第1通信用コイルと、
を備え、
前記第2コイルは、
前記第1電力用コイルが送信した電力を受電するための第2電力用コイルと、
前記第1通信用コイルと通信するための第2通信用コイルと、
を備えることを特徴とする請求項1ないし請求項4のいずれかに記載の電子機器。 - 前記第1コイルと前記第2コイルを面方向に積み重ねて配置した
ことを特徴とする請求項5記載の電子機器。 - 前記第1電力用コイルと前記第2電力用コイルを面方向に対向配置するとともに、
前記第1通信用コイルと前記第2通信用コイルを面方向に対向配置し、
前記第1電力用コイルおよび前記第2電力用コイルの組からなる第1セットと、前記第1通信用コイルおよび前記第2通信用コイルの組からなる第2セットを、
間に磁性体を介して面方向に積み重ねて配置した
ことを特徴とする請求項6記載の電子機器。 - 前記第1セットと前記第2セットの対向面の反対側に位置するコイルの外側に磁性体を配置した
ことを特徴とする請求項7記載の電子機器。 - 前記第1セットと前記第2セットの間に磁気シールド材を配置した
ことを特徴とする請求項7または請求項8記載の電子機器。 - 前記第1コイルおよび前記第2コイルは、
単一のコイルを中間タップで2つのコイルに分割することで、
前記第1電力用コイルと前記第1通信用コイル、および前記第2電力用コイルと前記第2通信用コイルを備えるように構成された
ことを特徴とする請求項5ないし請求項9のいずれかに記載の電子機器。 - 前記第1コイルまたは前記第2コイルの少なくとも一方は、
複数のコイルを直列接続して面方向に重ねることでコイル巻数を調整されてなる
ことを特徴とする請求項1ないし請求項10のいずれかに記載の電子機器。 - 前記第1コイルまたは前記第2コイルの少なくとも一方は、
複数のコイルを並列接続して面方向に重ねることで電流容量を調整されてなる
ことを特徴とする請求項1ないし請求項11のいずれかに記載の電子機器。 - 第1電子回路基板と、
第2電子回路基板と、
前記第1電子回路基板に接続された第1コイルと、
前記第2電子回路基板に接続された第2コイルと、
を備え、
前記第1コイルから前記第2コイルへ電磁誘導により電力を送電することで、
前記第1電子回路基板と前記第2電子回路基板の間を電気的に接続し、
前記第1コイルまたは前記第2コイルの少なくとも一方は、
フレキシブル基板で構成され、
前記第1電子回路基板または前記第2電子回路基板の電子回路を実装した面と反対側の面に固定されるとともに、
前記第1電子回路基板または前記第2電子回路基板の端部で折り曲げられて前記電子回路を実装した面の側に延設された上で前記電子回路と接続されている
ことを特徴とする電子機器。 - 前記第1コイルは、
前記第1電子回路基板から前記第2電子回路基板へ電力を送電するための第1電力用コイルと、
前記第1電子回路基板と前記第2電子回路基板の間で通信を行うための第1通信用コイルと、
を備え、
前記第2コイルは、
前記第1電力用コイルが送信した電力を受電するための第2電力用コイルと、
前記第1通信用コイルと通信するための第2通信用コイルと、
を備えることを特徴とする請求項13記載の電子機器。 - 前記第1電力用コイルと前記第2電力用コイルを面方向に対向配置するとともに、
前記第1通信用コイルと前記第2通信用コイルを面方向に対向配置し、
前記第1電力用コイルおよび前記第2電力用コイルの組からなる第1セットと、前記第1通信用コイルおよび前記第2通信用コイルの組からなる第2セットを、
間に磁性体を介して面方向に積み重ねて配置した
ことを特徴とする請求項14記載の電子機器。 - 前記第1セットと前記第2セットの対向面の反対側に位置するコイルの外側に磁性体を配置した
ことを特徴とする請求項15記載の電子機器。 - 前記第1セットと前記第2セットの間に磁気シールド材を配置した
ことを特徴とする請求項15または請求項16記載の電子機器。 - 前記第1コイルと前記第2コイルは、シリアルデータを互いに送受信する
ことを特徴とする請求項1ないし請求項17のいずれかに記載の電子機器。 - 前記第1コイルまたは前記第2コイルが送信するデータを前記シリアルデータと合成して単一の送信データとするデータ合成手段を備え、
前記第1コイルまたは前記第2コイルは、
前記データ合成手段が合成した前記送信データを送信する
ことを特徴とする請求項18記載の電子機器。 - 前記第1コイルまたは前記第2コイルが受信した前記送信データを前記データ合成手段が合成する前の各データに分割するデータ分割手段を備えた
ことを特徴とする請求項19記載の電子機器。 - 前記第1電子回路基板および前記第2電子回路基板上に実装されている電子部品が用いる通信信号速度よりも、
前記第1コイルと前記第2コイルの間の通信信号速度を速くした
ことを特徴とする請求項1ないし請求項20のいずれかに記載の電子機器。 - 前記第1コイルと前記第2コイルは巻き線仕様が異なる
ことを特徴とする請求項1ないし請求項21のいずれかに記載の電子機器。 - 前記第1電子回路基板と前記第2電子回路基板は、互いに着脱自在に構成されている
ことを特徴とする請求項1ないし請求項22のいずれかに記載の電子機器。 - 第1電子回路基板と、
第2電子回路基板と、
前記第1電子回路基板に接続された第1コイルと、
前記第2電子回路基板に接続された第2コイルと、
を備えた電子機器の電子回路基板を接続する方法であって、
前記第1コイルから前記第2コイルへ電磁誘導により電力を送電することで、
前記第1電子回路基板と前記第2電子回路基板の間を電気的に接続する
ことを特徴とする電子回路基板の接続方法。 - 前記第1コイルと前記第2コイルを、フレキシブル基板を用いて構成した
ことを特徴とする請求項24記載の電子回路基板の接続方法。 - 第1電子回路基板と、
第2電子回路基板と、
前記第1電子回路基板に接続された第1コイルと、
前記第2電子回路基板に接続された第2コイルと、
を備えた電子機器の電子回路基板を接続する方法であって、
前記第1コイルから前記第2コイルへ電磁誘導により電力を送電することで、
前記第1電子回路基板と前記第2電子回路基板の間を電気的に接続し、
前記第1コイルまたは前記第2コイルの少なくとも一方を、
フレキシブル基板で構成し、
前記第1電子回路基板または前記第2電子回路基板の電子回路を実装した面と反対側の面に固定するとともに、
前記第1電子回路基板または前記第2電子回路基板の端部で折り曲げて前記電子回路を実装した面の側に延設した上で前記電子回路と接続する
ことを特徴とする電子回路基板の接続方法。 - 前記第1コイルを、
前記第1電子回路基板から前記第2電子回路基板へ電力を送電するための第1電力用コイルと、
前記第1電子回路基板と前記第2電子回路基板の間で通信を行うための第1通信用コイルと、
で構成するとともに、
前記第2コイルを、
前記第1電力用コイルが送信した電力を受電するための第2電力用コイルと、
前記第1通信用コイルと通信するための第2通信用コイルと、
で構成したことを特徴とする請求項26記載の電子回路基板の接続方法。 - 前記第1電力用コイルと前記第2電力用コイルを面方向に対向配置するとともに、
前記第1通信用コイルと前記第2通信用コイルを面方向に対向配置し、
前記第1電力用コイルおよび前記第2電力用コイルの組からなる第1セットと、前記第1通信用コイルおよび前記第2通信用コイルの組からなる第2セットを、
間に磁性体を介して面方向に積み重ねて配置した
ことを特徴とする請求項27記載の電子回路基板の接続方法。 - 前記第1セットと前記第2セットの対向面の反対側に位置するコイルの外側に磁性体を配置した
ことを特徴とする請求項28記載の電子回路基板の接続方法。 - 前記第1セットと前記第2セットの間に磁気シールド材を配置した
ことを特徴とする請求項28または請求項29記載の電子回路基板の接続方法。
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JP2015144409A (ja) * | 2013-12-26 | 2015-08-06 | ホシデン株式会社 | 雄コネクタ、雌コネクタ及び雄コネクタと雌コネクタと接続構造 |
US10305549B2 (en) | 2013-12-26 | 2019-05-28 | Hosiden Corporation | Male connector, female connector, and connection structure of male connector and female connector |
WO2017110273A1 (ja) * | 2015-12-21 | 2017-06-29 | ホシデン株式会社 | 非接触通信モジュール |
JP2017118476A (ja) * | 2015-12-21 | 2017-06-29 | ホシデン株式会社 | 非接触通信モジュール |
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Also Published As
Publication number | Publication date |
---|---|
AU2009250645A1 (en) | 2009-11-26 |
JP2009284657A (ja) | 2009-12-03 |
EP3285271A1 (en) | 2018-02-21 |
HK1152144A1 (en) | 2012-02-17 |
EP3273455B1 (en) | 2019-08-28 |
CN102037526B (zh) | 2012-11-28 |
US8643219B2 (en) | 2014-02-04 |
CN102037526A (zh) | 2011-04-27 |
AU2009250645B2 (en) | 2013-02-21 |
EP2284849A4 (en) | 2017-06-21 |
EP2284849B1 (en) | 2018-07-25 |
JP4698702B2 (ja) | 2011-06-08 |
EP3285271B1 (en) | 2019-08-21 |
US20110043050A1 (en) | 2011-02-24 |
EP2284849A1 (en) | 2011-02-16 |
EP3273455A1 (en) | 2018-01-24 |
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