WO2015097805A1 - 高周波整流回路用自動整合回路 - Google Patents
高周波整流回路用自動整合回路 Download PDFInfo
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- WO2015097805A1 WO2015097805A1 PCT/JP2013/084833 JP2013084833W WO2015097805A1 WO 2015097805 A1 WO2015097805 A1 WO 2015097805A1 JP 2013084833 W JP2013084833 W JP 2013084833W WO 2015097805 A1 WO2015097805 A1 WO 2015097805A1
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- variable
- contact switching
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- frequency rectifier
- rectifier circuit
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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
-
- 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
- H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
-
- 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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
- H02J50/27—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
Definitions
- the present invention relates to an automatic matching circuit for a high-frequency rectifier circuit that automatically adjusts impedance matching between the output impedance of a power transmission receiving antenna and the input impedance of a high-frequency rectifier circuit.
- a matching circuit has been provided in order to adjust impedance matching between the power supply on the input side and the primary coil (transmission antenna) on the output side (see, for example, Patent Document 1).
- the adjustment range of impedance matching is expanded by using a variable inductor whose variable inductance value is variable by switching contacts using a switch and a variable capacitor whose variable capacitance value is variable (variable capacitor).
- variable capacitors and variable inductors of the conventional configuration are based on the elements that have been known so far, and thus have an element structure with mechanical contacts. Therefore, there is a problem that the life of the element is short due to wear of the mechanical contact, and the life of the system is limited. In addition, since constant switching at high speed is not possible, there is a problem that the startup speed of the system is slow. Further, when constant switching is performed in an energized state, discharge occurs at a mechanical contact inside the element, which causes a problem of inducing component failure due to fusing, welding, carbonization, high voltage noise, and the like. Further, the conventional configuration does not assume a case where the input impedance of the transmission antenna changes. Therefore, there is a problem in that effective impedance matching cannot be achieved for a moving body in which the distance between the transmission antenna and the reception antenna in the wireless power transmission system varies.
- the present invention has been made to solve the above problems, and uses an element having no mechanical contact, and impedance matching between the output impedance of the power transmission receiving antenna and the input impedance of the high frequency rectifier circuit.
- An object of the present invention is to provide an automatic matching circuit for a high-frequency rectifier circuit that can automatically adjust the frequency.
- the high-frequency rectifier circuit automatic matching circuit performs continuous contact switching for high-frequency impedance matching of 2 MHz or more between the output impedance of the power transmission receiving antenna and the input impedance of the high-frequency rectifier circuit.
- Capacitance value is variable by electronic components that can change the inductance value by electronic parts that perform contact switching including electrical contact switching, and electronic parts that perform contact switching including continuous contact switching for impedance matching.
- a variable control circuit for controlling electronic components that electrically perform contact switching including continuous contact switching of the variable inductor and the variable capacitor so as to perform impedance matching.
- the impedance matching between the output impedance of the power transmission receiving antenna and the input impedance of the high frequency rectifier circuit is automatically adjusted using an element having no mechanical contact. be able to.
- FIG. 1 is a diagram showing a configuration of an automatic matching circuit for a high-frequency rectifier circuit according to Embodiment 1 of the present invention.
- the automatic matching circuit for a high-frequency rectifier circuit automatically adjusts impedance matching at a high frequency of 2 MHz or more between the output impedance of the resonant receiving antenna (reception antenna for power transmission) 10 and the input impedance of the high-frequency rectifier circuit 11. It is.
- the high-frequency rectifier automatic matching circuit includes a variable inductor L1, variable capacitors C1 and C2, and a variable control circuit 1.
- the resonant receiving antenna 10 is a resonant antenna for power transmission having LC resonance characteristics (not limited to a non-contact type).
- the resonance receiving antenna 10 may be any of a magnetic field resonance type, an electric field resonance type, and an electromagnetic induction type.
- the high-frequency rectifier circuit 11 rectifies an alternating voltage at a high frequency exceeding 2 MHz.
- the variable inductor L1 is an element for performing impedance matching at a high frequency of 2 MHz or higher between the output impedance of the resonant receiving antenna 10 and the input impedance of the high frequency rectifier circuit 11.
- the variable inductor L1 is configured such that an inductance value (L value) is variable by electronic components that electrically perform contact switching including continuous contact switching according to control by the variable control circuit 1. That is, the variable inductor L1 is an element that does not have a mechanical contact as a configuration that varies the inductance value. Details of the variable inductor L1 will be described later.
- variable capacitors C1 and C2 are elements for performing impedance matching at a high frequency of 2 MHz or more between the output impedance of the resonant receiving antenna 10 and the input impedance of the high frequency rectifier circuit 11.
- the variable capacitors C1 and C2 are configured to have variable capacitance values by electronic components that electrically perform contact switching including continuous contact switching in accordance with control by the variable control circuit 1. That is, the variable capacitors C1 and C2 are elements that do not have a mechanical contact as a configuration that varies the capacitance value. Details of the variable capacitors C1 and C2 will be described later.
- the variable control circuit 1 includes a variable inductor L1 and variable capacitors C1 and C2 so as to perform impedance matching at a high frequency of 2 MHz or higher between the output impedance of the resonant receiving antenna 10 and the input impedance of the high frequency rectifier circuit 11.
- the electronic component that electrically performs contact switching including continuous contact switching is controlled. That is, the variable control circuit 1 varies the inductance value of the variable inductor L1 and the capacitance values of the variable capacitors C1 and C2 to automatically adjust impedance matching.
- the variable control circuit 1 has a configuration executed by program processing using a CPU based on software, or is executed by feedback control using a detection signal based on voltage and current superimposed on the resonance type receiving antenna 10. .
- FIG. 2 shows a variable inductor of a type in which a motor control circuit 22 is used as an electronic component that electrically performs contact switching including continuous contact switching, and the magnetic path length of the coil 21 is automatically changed by the motor control circuit 22. L1.
- the variable control circuit 1 drives the motor control circuit 22 to physically vary the magnetic path length of the coil 21, thereby varying the inductance value.
- 2A and 2B the number of turns of the coil 21 is the same.
- FIG. 3 shows a type in which a field effect transistor (FET) 23 is used as an electronic component that electrically performs contact switching including continuous contact switching, and the number of turns of the coil 21 is automatically adjusted by the FET 23.
- FET field effect transistor
- the FET 23 is connected to each winding point of the coil 21, and the variable control circuit 1 is used to switch on / off each FET 23, or by switching pulse width modulation (PWM) or the like. By making it variable, the inductance value is made variable.
- PWM pulse width modulation
- the FET 23 is an element such as a Si-MOSFET, SiC-MOSFET, GaN-FET, RF (Radio Frequency) FET, or the like, or these elements are connected in series to form a body diode in an OFF type.
- FIG. 4 shows a variable inductor L1 of a type in which an FET 23 is used as an electronic component that electrically performs contact switching including continuous contact switching, and the number of parallel connections of the coils 21 is automatically changed by the FET 23.
- the FET 23 is connected to each coil 21 connected in parallel, and the variable control circuit 1 switches ON / OFF of each FET 23 or switches the pulse width modulation (PWM), etc.
- the inductance value is varied by varying.
- the FET 23 is an element such as a Si-MOSFET, SiC-MOSFET, GaN-FET, or RF FET, or an element in which these elements are connected in series to form an OFF type body diode.
- FIG. 5 shows variable capacitors C1 and C2 of a type in which an FET 32 is used as an electronic component that electrically performs contact switching including continuous contact switching, and the number of parallel connections of the capacitor 31 is automatically changed by the FET 32.
- the FET 32 is connected to each capacitor 31 connected in parallel, and the ON / OFF of each FET 32 is switched by the variable control circuit 1 or the pulse width modulation (PWM) is switched, so that the number of capacitors 31 connected in parallel is changed.
- PWM pulse width modulation
- the capacitance value is varied by varying.
- the FET 32 is an element such as an Si-MOSFET, an SiC-MOSFET, a GaN-FET, an RF FET, or the like, and these elements are connected in series to form a body diode in an OFF type.
- FIG. 6 shows a bridge rectifier circuit is connected as the high-frequency rectifier circuit 11.
- FIG. 7 shows a high-frequency rectifier circuit 11 connected with a class E rectifier circuit.
- FIG. 8 shows a high-frequency rectifier circuit 11 connected with a double current rectifier circuit.
- FIG. 9 shows a high-frequency rectifier circuit 11 connected with a half-wave rectifier circuit.
- FIG. 10 shows a high voltage rectifier circuit 11 connected with a voltage doubler rectifier circuit.
- variable inductor L1 whose inductance value is variable by an electronic component that electrically performs contact switching including continuous contact switching, and continuous contact switching are included.
- the variable capacitors C1 and C2 whose capacitance values are variable by electronic parts that electrically switch contacts, and the high frequency of 2 MHz or more between the output impedance of the resonant receiving antenna 10 and the input impedance of the high frequency rectifier circuit 11
- the variable control circuit 1 that controls electronic components that electrically perform contact switching including continuous contact switching of the variable inductor L1 and the variable capacitors C1 and C2 so as to perform impedance matching is provided.
- the impedance matching can be automatically adjusted by using an element that does not have a contact, and it is low-cost, small and reliable. It is possible to enable the have operations. As a result, effective impedance matching is automatically performed even for mobile objects in which the distance between the transmission coil (transmission antenna) of the transmission side device and the reception coil (reception antenna) of the reception side device in the wireless power transmission system varies. Can be achieved.
- the circuit configuration is made up of elements that do not have mechanical contacts, mechanical wear inside the elements does not occur, and there is no limitation on the operating life as in the prior art.
- constant switching at high speed is possible, and system startup is quick. Also, constant switching in an energized state is possible, and no discharge or the like inside the element occurs at that time, so that no component failure is induced.
- variable capacitor C3 is added, and the variable control circuit 1 causes the inductance value of the variable inductor L1 and the capacitance values of the variable capacitors C1, C2, and C3. It is also possible to provide a resonance condition variable type automatic matching circuit that varies the resonance condition of the resonance type receiving antenna 10 by varying.
- the configuration of the variable capacitor C3 is the same as that of the variable capacitors C1 and C2. Further, elements may be added or omitted from the configuration of FIG.
- the present invention can be modified with any component of the embodiment or omitted with any component of the embodiment.
- the automatic matching circuit for a high-frequency rectifier circuit can automatically adjust impedance matching between the output impedance of the power transmission receiving antenna and the input impedance of the high-frequency rectifier circuit using an element having no mechanical contact. It is suitable for use in an automatic matching circuit for a high frequency rectifier circuit that adjusts impedance matching.
- variable control circuit 10 resonant receiving antenna, 11 high frequency rectifier circuit, 21 coil, 22 motor control circuit, 23 FET, 31 capacitor, 32 FET.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transmitters (AREA)
- Rectifiers (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Description
また、従来構成では、送信アンテナの入力インピーダンスが変化する場合を想定していない。そのため、ワイヤレス電力伝送システムにおける送信アンテナと受信アンテナとの距離が変動するような移動体に対しては、有効なインピーダンス整合を図れないという課題がある。
実施の形態1.
図1はこの発明の実施の形態1に係る高周波整流回路用自動整合回路の構成を示す図である。
高周波整流回路用自動整合回路は、共振型受信アンテナ(電力伝送用受信アンテナ)10の出力インピーダンスと高周波整流回路11の入力インピーダンスとの間の2MHz以上の高周波数のインピーダンス整合を自動で調整するものである。この高周波整流回路用自動整合回路は、図1に示すように、可変型インダクタL1、可変型コンデンサC1,C2及び可変制御回路1から構成されている。
図2は、継続的な接点切替えを含む接点切替えを電気的に行う電子部品としてモータ制御回路22を用い、このモータ制御回路22によりコイル21の磁路長を自動で可変させるタイプの可変型インダクタL1である。この構成では、可変制御回路1により、モータ制御回路22を駆動させてコイル21の磁路長を物理的に可変させることで、インダクタンス値を可変させる。なお図2(a),(b)において、コイル21のターン数は同じである。
図5は、継続的な接点切替えを含む接点切替えを電気的に行う電子部品としてFET32を用い、このFET32によりコンデンサ31の並列接続数を自動で可変するタイプの可変型コンデンサC1,C2である。この構成では、並列接続された各コンデンサ31にFET32を接続し、可変制御回路1により各FET32のON/OFFを切替えて、又はパルス幅変調(PWM)等を切替えて、コンデンサ31の並列接続数を可変させることで、容量値を可変させる。なおFET32は、Si-MOSFET、SiC-MOSFET、GaN-FET、RF用FETなどの素子、又は、これらの素子を直列接続してボディダイオードをOFF型に構成したものである。
図6は、高周波整流回路11としてブリッジ整流回路を接続したものである。また図7は、高周波整流回路11としてE級整流回路を接続したものである。また図8は、高周波整流回路11として倍電流整流回路を接続したものである。また図9は、高周波整流回路11として半波整流回路を接続したものである。また図10は、高周波整流回路11として倍電圧整流回路を接続したものである。
また、機械的接点を持たない素子による回路構成のため、素子内部の機械的磨耗が発生せず、従来のような運用寿命の制限がなくなる。また、高速での定数切替えができ、システム立ち上げが速くなる。また、通電状態での定数切替えが可能で、その際の素子内部の放電などが発生しないため、部品故障を誘発することがなくなる。
Claims (4)
- 電力伝送用受信アンテナの出力インピーダンスと高周波整流回路の入力インピーダンスとの間の2MHz以上の高周波数のインピーダンス整合を行うための、継続的な接点切替えを含む接点切替えを電気的に行う電子部品によりインダクタンス値を可変とする可変型インダクタと、
前記インピーダンス整合を行うための、継続的な接点切替えを含む接点切替えを電気的に行う電子部品により容量値を可変とする可変型コンデンサと、
前記インピーダンス整合を行うように前記可変型インダクタ及び前記可変型コンデンサの継続的な接点切替えを含む接点切替えを電気的に行う電子部品を制御する可変制御回路と
を備えた高周波整流回路用自動整合回路。 - 前記可変制御回路は、磁界共鳴による前記電力伝送用受信アンテナの共振条件を可変とする
ことを特徴とする請求項1記載の高周波整流回路用自動整合回路。 - 前記可変制御回路は、電界共鳴による前記電力伝送用受信アンテナの共振条件を可変とする
ことを特徴とする請求項1記載の高周波整流回路用自動整合回路。 - 前記可変制御回路は、電磁誘導による前記電力伝送用受信アンテナの共振条件を可変とする
ことを特徴とする請求項1記載の高周波整流回路用自動整合回路。
Priority Applications (3)
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JP2015554395A JPWO2015097805A1 (ja) | 2013-12-26 | 2013-12-26 | 高周波整流回路用自動整合回路 |
PCT/JP2013/084833 WO2015097805A1 (ja) | 2013-12-26 | 2013-12-26 | 高周波整流回路用自動整合回路 |
US15/107,362 US20170005532A1 (en) | 2013-12-26 | 2013-12-26 | Automatic matching circuit for high frequency rectification circuit |
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PCT/JP2013/084833 WO2015097805A1 (ja) | 2013-12-26 | 2013-12-26 | 高周波整流回路用自動整合回路 |
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Cited By (2)
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WO2018071170A1 (en) * | 2016-10-11 | 2018-04-19 | Qualcomm Incorporated | Hybrid rectification for wireless power |
JP2018113778A (ja) * | 2017-01-11 | 2018-07-19 | 矢崎総業株式会社 | 非接触給電システム及び非接触給電方法 |
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GB2535978B (en) * | 2015-02-04 | 2018-04-11 | Drayson Tech Europe Ltd | Rectifier for wireless power transfer |
TWI626827B (zh) * | 2015-02-26 | 2018-06-11 | 立錡科技股份有限公司 | 諧振式無線電源接收電路及其控制方法 |
US9853546B2 (en) * | 2015-12-23 | 2017-12-26 | Intel Corporation | Method and apparatus for reducing overshoot and undershoot using a reconfigurable inductor for switching mode voltage |
JP6519574B2 (ja) * | 2016-12-07 | 2019-05-29 | Tdk株式会社 | ワイヤレス受電装置及びこれを用いたワイヤレス電力伝送装置並びに整流器 |
WO2019092701A1 (en) * | 2017-11-07 | 2019-05-16 | B. G. Negev Technologies And Applications Ltd., At Ben-Gurion University | Capacitive wireless power transfer by means of adaptive matching networks |
US20200091754A1 (en) * | 2018-09-17 | 2020-03-19 | Newvastek Co., Ltd. | Low-energy-consumption high-frequency wireless charging system for lithium battery |
FR3099311B1 (fr) * | 2019-07-25 | 2021-11-19 | Valeo Equip Electr Moteur | Dispositif de transmission de puissance sans contact par couplage inductif à résonance pour recharger un véhicule automobile |
FR3099310B1 (fr) * | 2019-07-25 | 2022-12-16 | Valeo Equip Electr Moteur | Dispositif de transmission de puissance sans contact par couplage inductif à résonance pour recharger un véhicule automobile |
CN113615035A (zh) * | 2019-04-28 | 2021-11-05 | Oppo广东移动通信有限公司 | 用于无线充电的功率匹配方法、装置及无线充电装置 |
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- 2013-12-26 JP JP2015554395A patent/JPWO2015097805A1/ja active Pending
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