WO2015037362A1 - ワイヤレス受電装置、その制御回路および制御方法 - Google Patents
ワイヤレス受電装置、その制御回路および制御方法 Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
-
- 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
-
- 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
- H02J50/80—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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/266—One coil at each side, e.g. with primary and secondary coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
Definitions
- the present invention relates to wireless power feeding technology.
- contactless power transmission also referred to as non-contact power feeding or wireless power feeding
- WPC Wireless Power Consortium
- Qi international standard
- FIG. 1 is a diagram showing a configuration of a wireless power feeding system 100 compliant with the Qi standard.
- the power feeding system 100 includes a power transmission device 200 (TX, Power Transmitter) and a power receiving device 300 (RX, Power Receiver).
- the power receiving device 300 is mounted on an electronic device such as a mobile phone terminal, a smart phone, an audio player, a game device, or a tablet terminal.
- the power transmission device 200 includes a transmission coil (primary coil) 202, a driver 204, a controller 206, and a demodulator 208.
- the driver 204 includes an H-bridge circuit (full-bridge circuit) or a half-bridge circuit, and applies a drive signal S 1, specifically a pulse signal, to the transmission coil 202.
- An electromagnetic field power signal S2 is generated.
- the controller 206 controls the power transmission apparatus 200 as a whole. Specifically, the controller 206 changes the transmission power by controlling the switching frequency of the driver 204 or the switching duty ratio.
- a communication protocol is defined between the power transmission device 200 and the power reception device 300, and information can be transmitted from the power reception device 300 to the power transmission device 200 using the control signal S3.
- This control signal S3 is transmitted from the reception coil 302 (secondary coil) to the transmission coil 202 in the form of AM (Amplitude Modulation) modulation using backscatter modulation.
- the control signal S3 includes, for example, power control data (also referred to as a packet) for instructing the amount of power supplied to the power receiving apparatus 300, data indicating unique information of the power receiving apparatus 300, and the like.
- the demodulator 208 demodulates the control signal S3 included in the current or voltage of the transmission coil 202.
- the controller 206 controls the driver 204 based on the power control data included in the demodulated control signal S3.
- the power receiving apparatus 300 includes a receiving coil 302, a rectifier circuit 304, a capacitor 306, a modulator 308, a secondary battery 310, a controller 312, and a charging circuit 314.
- the reception coil 302 receives the power signal S ⁇ b> 2 from the transmission coil 202 and transmits a control signal S ⁇ b> 3 to the transmission coil 202.
- the rectifier circuit 304 and the capacitor 306 rectify and smooth the current S4 induced in the receiving coil 302 in accordance with the power signal S2, and convert it into a DC voltage.
- the charging circuit 314 charges the secondary battery 310 using the power supplied from the power transmission device 200.
- the controller 312 monitors the power supply amount received by the power receiving apparatus 300, and generates power control data (control error value) instructing the power supply amount accordingly.
- the modulator 308 modulates the control signal S3 including the power control data and modulates the coil current of the reception coil 302, thereby modulating the coil current and the coil voltage of the transmission coil 202.
- FIG. 2 is a flowchart showing an operation sequence of the power feeding system 100.
- the state of the power transmission device 200 is large, and is divided into a selection phase (Selection Phase) ⁇ 1, a power transmission (Power Phase) ⁇ 2, and an authentication / setting phase (Identification & Configuration phase) ⁇ 3.
- the power transmission device 200 starts power transmission to the power reception device 300 (RX) (S100).
- a control signal S3 indicating the current power transmission state from the power receiving device RX is fed back to the power transmitting device TX (S102).
- the power transmission device TX adjusts the amount of power transmission based on the control signal S3 (S104).
- the power transmission device TX transmits a control signal S3 indicating the completion of charging from the power reception device RX (S106), or that the power reception device RX has been removed from the power supply range of the power transmission device TX based on a communication timeout error.
- the power transmission device TX stops power transmission and enters the selection phase ⁇ 1.
- the power transmission device TX transmits a power signal S2 at predetermined time intervals (Object detection detection interval, for example, 500 msec), and confirms the presence or absence of the power reception device RX (S200). This is called an analog pin phase (Analog Ping Phase).
- the process proceeds to the authentication / setting phase ⁇ 3, and the digital pin phase (Digital Ping Phase) is executed (S204).
- the power transmitting apparatus TX receives the individual information of the power receiving apparatus RX (S206).
- information on power transmission conditions is transmitted from the power receiving device RX to the power transmitting device TX (S208), and the process proceeds to the power transmission phase ⁇ 2.
- the operation sequence of the power transmission device 200 has been described above.
- the charging circuit 314 can be switched between constant current (CC) charging and constant voltage (CV: constant voltage) charging according to the state of the secondary battery 310, and according to the remaining battery level during CC charging. Thus, the amount of charging current supplied to the secondary battery 310 is changed.
- CC constant current
- CV constant voltage
- FIG. 3 is an operation waveform diagram of the power receiving device 300 of FIG. In the steady state, the current supplied from the rectifier circuit 304 to the capacitor 306 and the current supplied from the capacitor 306 to the charging circuit 314, that is, the charging current Ibat are balanced, and the rectified voltage Vrect generated in the capacitor 306 is a target level. Has been stabilized.
- the current supplied from the rectifier circuit 304 to the capacitor 306 depends on the power supplied from the power transmission device 200 to the power reception device 300, that is, is controlled based on the control signal S3.
- the charging circuit 314 increases the charging current Ibat, a large current is drawn from the capacitor 306.
- the control error value included in the control signal S3 increases, and feedback is applied so that the power supplied from the power transmitting apparatus 200 to the power receiving apparatus 300 increases. Since the feedback speed is limited by the communication speed of the control signal S3 and the time until the power transmission apparatus 200 is stabilized at a new operating point, if the charging current Ibat fluctuates rapidly, the feedback cannot follow.
- the rectified voltage Vrect may deviate significantly from its target value.
- the power transmission apparatus 200 cannot correctly receive the control error value. That is, a sharp change in the charging current Ibat may cause the feedback loop to be interrupted.
- the power transmission device TX stops power transmission and returns to the selection phase ⁇ 1.
- the present invention has been made in view of such a problem, and one of exemplary purposes of an aspect thereof is to provide a power receiving device capable of stabilizing communication with the power transmitting device.
- the wireless power receiving apparatus includes a receiving coil, a rectifying circuit that is connected to the receiving coil and generates a rectified voltage, a charging circuit that receives the rectified voltage and charges a battery, and is connected to the receiving coil and receives the rectifying coil based on a control value. And a modulator for transmitting a control packet including a control value to the wireless power transmission device.
- the control circuit includes a charge control unit that controls a charging current supplied to the battery from the charging circuit, and a control error value that indicates a transmission power amount from the wireless power transmitting apparatus based on an error between a current rectified voltage and a target value thereof.
- a power control unit that generates and outputs a control value to the modulator.
- the charging control unit changes the charging current when the absolute value of the error is smaller than a predetermined threshold value.
- the rectified voltage deviates significantly from the target value or the rectified voltage changes with a steep waveform.
- communication between the power transmission device and the power reception device can be stabilized.
- the charging control unit When changing the charging current from the initial value to the final value, the charging control unit changes the charging current stepwise from the initial value toward the final value through a plurality of intermediate values provided between them, and Each time the charging current is changed by one step, the charging current may be changed to the value of the next step by waiting until the absolute value of the error becomes smaller than the threshold value.
- the charging control unit may change the charging current in units of a predetermined minimum step.
- the control circuit may conform to the Qi standard.
- the control circuit may be integrated on a single semiconductor substrate. “Integrated integration” includes the case where all of the circuit components are formed on a semiconductor substrate and the case where the main components of the circuit are integrated. A resistor, a capacitor, or the like may be provided outside the semiconductor substrate. By integrating the circuit as one IC, the circuit area can be reduced and the characteristics of the circuit elements can be kept uniform.
- the wireless power receiving apparatus includes a receiving coil, a rectifying circuit that is connected to the receiving coil and generates a rectified voltage, a charging circuit that receives the rectified voltage and charges a battery, and is connected to the receiving coil and receives the rectifying coil based on a control value. And a modulator that transmits a control packet including a control value to the wireless power transmitting apparatus, and a control circuit described in any of the above.
- the wireless device includes a receiving coil, a rectifying circuit that is connected to the receiving coil and generates a rectified voltage, a charging circuit that receives the rectified voltage and charges a battery, and is connected to the receiving coil and is configured to receive the rectified voltage based on a control value.
- a modulator that modulates voltage or current and transmits a control packet including a control value to the wireless power transmission device, a charge control unit that controls a charging current supplied from the charging circuit to the battery, a current rectified voltage, and a target value thereof
- a power control unit that outputs a control error value indicating a transmission power amount from the wireless power transmission apparatus based on the error to the modulator as a control value.
- the charging control unit changes the charging current so that the absolute value of the error does not exceed a predetermined allowable value.
- the charging control unit repeats the step of changing the charging current by a predetermined amount and the step of waiting until the absolute value of the error becomes smaller than a predetermined threshold value. Also good.
- the charging control unit may change the charging current in units of a predetermined minimum step.
- the wireless power receiving apparatus may conform to the Qi standard.
- communication with the power transmission device can be stabilized.
- FIG. 5 is a waveform diagram illustrating an operation of the power receiving device of FIG. 4.
- the state in which the member A is connected to the member B means that the member A and the member B are electrically connected to each other in addition to the case where the member A and the member B are physically directly connected. It includes cases where the connection is indirectly made through other members that do not substantially affect the general connection state, or that do not impair the functions and effects achieved by their combination.
- the state in which the member C is provided between the member A and the member B refers to the case where the member A and the member C or the member B and the member C are directly connected, as well as their electric It includes cases where the connection is indirectly made through other members that do not substantially affect the general connection state, or that do not impair the functions and effects achieved by their combination.
- FIG. 4 is a circuit diagram showing a configuration of a wireless power receiving apparatus (hereinafter simply referred to as a power receiving apparatus) 300 according to the embodiment.
- the power receiving apparatus 300 is used in the power supply system 100 that conforms to the Qi standard of FIG.
- the power receiving apparatus 300 includes a receiving coil 302, a rectifier circuit 304, a capacitor 306, a modulator 308, a charging circuit 314, a secondary battery 310, and a control circuit 320.
- the reception coil 302 is provided to receive the power signal S2 transmitted from the power transmission device 200 and to transmit a control signal (control packet) S3.
- the rectifier circuit 304 is connected to the receiving coil 302 and generates a rectified voltage Vrect.
- a smoothing capacitor 306 is connected to the output of the rectifier circuit 304.
- the charging circuit 314 receives the rectified voltage Vrect and charges the secondary battery 310.
- the charging circuit 314 can operate in a mode instructed by the control circuit 320 described later, and the charging current Ibat can also be adjusted based on a command value from the control circuit 320.
- the modulator 308 is connected to the receiving coil 302, modulates the voltage or current of the receiving coil 302 based on the control value S5, and transmits a control signal S3 including the control value S5 to a wireless power transmitting apparatus (not shown).
- the control circuit 320 includes a charge control unit 322 and a power control unit 324, and is integrated on a single semiconductor substrate.
- the charging circuit 314 controls the charging circuit 314 and adjusts the charging current Ibat supplied to the secondary battery 310. Specifically, the optimum charging current Ibat is determined based on the state of the secondary battery 310, for example, the battery voltage Vbat, the remaining amount of the secondary battery 310, etc., and the current control data S6 indicating the charging current Ibat is charged. Output to circuit 314.
- the control error value CE is, for example, a value obtained by quantizing the error dV with 256 gradations (8 bits) from ⁇ 128 to +128.
- the charging control unit 322 changes the charging current Ibat when the absolute value
- the charging control unit 322 changes the charging current Ibat from the initial value (current location) Istart to the final value Iend, a plurality of n intermediate values Im1, Im2, between the initial value Istart and the final value Iend. ... Imn is set. Then, the charging control unit 322 changes the charging current Ibat from the initial value Istart to the final value Iend in a step shape through a plurality of intermediate values Im1, Im2,... Imn provided therebetween. Each time the charging control unit 322 changes the charging current Ibat by one step, the charging control unit 322 waits until the absolute value
- the charging control unit 322 changes the charging current Ibat in a pattern determined so that the absolute value
- FIG. 5 is a waveform diagram (solid line) showing the operation of the power receiving device 300 of FIG.
- the waveform corresponding to FIG. 3 is indicated by a one-dot chain line.
- the target value of the charging current Ibat changes from the current value (initial value) Istart to the next target value (final value) Iend.
- the charging current Ibat is switched from the initial value Istart to the final value Iend, so that the rectified voltage Vrect is steeply and greatly increased from the target value Vref. As a result, there is a problem that communication between the power transmission device 200 and the power reception device 300 is interrupted.
- the operation of the power receiving device 300 will be described with reference to a solid line.
- the rectified voltage Vrect slightly decreases.
- the control error value CE increases.
- the power transmission apparatus 200 increases transmission power.
- the rectified voltage Vrect rises and approaches the target value Vref, and the control error value CE, which is an error dV thereof, decreases.
- the power receiving device 300 when the absolute value
- the rectified voltage Vrect slightly increases.
- the control error value CE decreases (its absolute value increases). Thereby, the power transmission apparatus 200 reduces transmission power.
- the rectified voltage Vrect decreases and approaches the target value Vref, and the absolute value of the control error value CE, which is their error dV, decreases.
- the control circuit 320 repeats this operation and changes the charging current Ibat to the final value Iend.
- the charging current Ibat is gently changed both when the charging current Ibat is increased and when it is decreased.
- the present invention is not limited to this.
- the charging current Ibat may be changed gently only when it is increased, and may be changed abruptly when it is decreased.
- the wireless power transmission device conforming to the Qi standard has been described.
- the present invention is not limited to this, and the wireless power transmission device used in a system similar to the Qi standard or a standard that will be developed in the future.
- the present invention can also be applied to a compliant power transmission device 200.
- SYMBOLS 100 Power feeding system, 200, TX ... Power transmission apparatus, 202 ... Transmission coil, 204 ... Driver, 206 ... Controller, 208 ... Demodulator, 300, RX ... Power reception apparatus, 302 ... Reception coil, 304 ... Rectifier circuit, 306 ... Capacitor 308, modulator, 310, secondary battery, 312, controller, 314, charging circuit, 320, control circuit, 322, charge control unit, 324, power control unit, S1, drive signal, S2, power signal, S3,. Control signal.
- the present invention can be used for wireless power feeding technology.
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Abstract
Description
「一体集積化」とは、回路の構成要素のすべてが半導体基板上に形成される場合や、回路の主要構成要素が一体集積化される場合が含まれ、回路定数の調節用に一部の抵抗やキャパシタなどが半導体基板の外部に設けられていてもよい。回路を1つのICとして集積化することにより、回路面積を削減することができるとともに、回路素子の特性を均一に保つことができる。
同様に、「部材Cが、部材Aと部材Bの間に設けられた状態」とは、部材Aと部材C、あるいは部材Bと部材Cが直接的に接続される場合のほか、それらの電気的な接続状態に実質的な影響を及ぼさない、あるいはそれらの結合により奏される機能や効果を損なわせない、その他の部材を介して間接的に接続される場合も含む。
実施の形態では、充電電流Ibatを増大させるとき、減少させるときの両方において、充電電流Ibatを緩やかに変化させるものとしたが本発明はそれには限定されない。たとえば、充電電流Ibatを増大させるときのみ緩やかに変化させ、減少させるときには、急峻に変化させてもよい。
実施の形態では、Qi規格に準拠するワイヤレス送電装置について説明したが、本発明はそれに限定されず、Qi規格と類似するシステムに使用されるワイヤレス送電装置や、将来策定されるであろう規格に準拠する送電装置200にも適用しうる。
Claims (14)
- 受信コイル、前記受信コイルに接続され、整流電圧を生成する整流回路、前記整流電圧を受け、電池を充電する充電回路、前記受信コイルに接続され、制御値にもとづいて前記受信コイルの電圧または電流を変調し、ワイヤレス送電装置に前記制御値を含む制御パケットを送信する変調器、を備えるワイヤレス受電装置に使用される制御回路であって、
前記制御回路は、
前記充電回路から前記電池に供給される充電電流を制御する充電制御部と、
現在の前記整流電圧とその目標値の誤差にもとづいて前記ワイヤレス送電装置からの送信電力量を指示する制御エラー値を生成し、前記制御値として前記変調器に出力する電力制御部と、
を備え、
前記充電制御部は、前記誤差の絶対値が所定のしきい値より小さいときに、前記充電電流を変化させることを特徴とする制御回路。 - 前記充電制御部は、前記充電電流を初期値から最終値まで変化させるとき、
前記初期値から前記最終値に向かって、それらの間に設けられた複数の中間値を経てステップ状に前記充電電流を変化させ、
かつ、前記充電電流を1ステップ分、変化させるたびに、前記誤差の絶対値が前記しきい値より小さくなるまで待機し、前記充電電流を次のステップの値に変化させることを特徴とする請求項1に記載の制御回路。 - 前記複数の中間値の間隔は、前記充電回路に設定可能な充電電流の最小ステップと等しいことを特徴とする請求項2に記載の制御回路。
- Qi規格に準拠したことを特徴とする請求項1から3のいずれかに記載の制御回路。
- ひとつの半導体基板に一体集積化されることを特徴とする請求項1から4のいずれかに記載の制御回路。
- 受信コイルと、
前記受信コイルに接続され、整流電圧を生成する整流回路と、
前記整流電圧を受け、電池を充電する充電回路と、
前記受信コイルに接続され、制御値にもとづいて前記受信コイルの電圧または電流を変調し、ワイヤレス送電装置に前記制御値を含む制御パケットを送信する変調器と、
請求項1から5のいずれかに記載の制御回路と、
を備えることを特徴とするワイヤレス受電装置。 - 受信コイルと、
前記受信コイルに接続され、整流電圧を生成する整流回路と、
前記整流電圧を受け、電池を充電する充電回路と、
前記受信コイルに接続され、制御値にもとづいて前記受信コイルの電圧または電流を変調し、ワイヤレス送電装置に前記制御値を含む制御パケットを送信する変調器と、
前記充電回路から前記電池に供給される充電電流を制御する充電制御部と、
現在の前記整流電圧とその目標値の誤差にもとづいて前記ワイヤレス送電装置からの送信電力量を指示する制御エラー値を生成し、前記制御値として前記変調器に出力する電力制御部と、
を備え、
前記充電制御部は、前記誤差の絶対値が所定の許容値を超えないよう前記充電電流を変化させるよう構成されることを特徴とするワイヤレス受電装置。 - 前記充電制御部は、前記充電電流を初期値から最終値まで変化させるとき、
前記充電電流を所定量変化させるステップと、
前記誤差の絶対値が所定のしきい値より小さくなるまで待機するステップと、
を繰り返すことを特徴とする請求項7に記載のワイヤレス受電装置。 - 前記所定量は、前記充電回路に設定可能な前記充電電流の最小ステップと等しいことを特徴とする請求項8に記載のワイヤレス受電装置。
- Qi規格に準拠したことを特徴とする請求項7から9のいずれかに記載のワイヤレス受電装置。
- ワイヤレス受電装置の制御方法であって、
前記ワイヤレス受電装置は、受信コイル、前記受信コイルに接続され、整流電圧を生成する整流回路、前記整流電圧を受け、電池を充電する充電回路、前記受信コイルに接続され、前記受信コイルの電圧または電流を変調し、ワイヤレス送電装置にパケットを送信する変調器、を備え、
前記制御方法は、
前記充電回路から前記電池に供給される充電電流を制御するステップと、
現在の前記整流電圧とその目標値の誤差にもとづいて、前記ワイヤレス送電装置からの送信電力量を指示する制御エラー値を生成するステップと、
前記制御エラー値にもとづいて前記変調器を制御し、前記制御エラー値を含む制御パケットを前記受信コイルから前記ワイヤレス送電装置に送信せしめるステップと、
を備え、
前記充電電流は、前記誤差の絶対値が所定のしきい値より小さいときに変化することを特徴とする制御方法。 - ワイヤレス受電装置の制御方法であって、
前記ワイヤレス受電装置は、受信コイル、前記受信コイルに接続され、整流電圧を生成する整流回路、前記整流電圧を受け、電池を充電する充電回路、前記受信コイルに接続され、前記受信コイルの電圧または電流を変調し、ワイヤレス送電装置にパケットを送信する変調器、を備え、
前記制御方法は、
現在の前記整流電圧とその目標値の誤差にもとづいて、前記ワイヤレス送電装置からの送信電力量を指示する制御エラー値を生成するステップと、
前記制御エラー値にもとづいて前記変調器を制御し、前記制御エラー値を含む制御パケットを前記受信コイルから前記ワイヤレス送電装置に送信せしめるステップと、
前記誤差が所定の許容値を超えないように、前記充電回路から前記電池に供給される充電電流を制御するステップと、
を備えることを特徴とする制御方法。 - 前記充電電流を制御するステップは、前記充電電流を初期値から最終値まで変化させるとき、
前記充電電流を所定量変化させるステップと、
前記誤差の絶対値が前記しきい値より小さくなるまで待機するステップと、
を繰り返すことを特徴とする請求項11または12に記載の制御方法。 - 前記所定量は、前記充電回路に設定可能な前記充電電流の最小ステップと等しいことを特徴とする請求項13に記載の制御方法。
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CN113937901A (zh) * | 2016-08-26 | 2022-01-14 | 纽卡润特有限公司 | 无线连接器*** |
KR101897646B1 (ko) * | 2017-01-09 | 2018-09-12 | 엘지이노텍 주식회사 | 무선 충전 장치 및 그 방법 |
AU2018247552A1 (en) * | 2017-04-07 | 2019-10-24 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless charging apparatus and method, and device to be charged |
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WO2020085614A1 (ko) * | 2018-10-23 | 2020-04-30 | 엘지전자 주식회사 | 무선전력 전송 시스템에서 데이터를 전송하는 방법 및 장치 |
KR102659965B1 (ko) | 2019-07-31 | 2024-04-24 | 삼성전자 주식회사 | 전자 장치 및 그의 주파수 간섭 제어 방법 |
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JP2021129410A (ja) | 2020-02-13 | 2021-09-02 | キヤノン株式会社 | 受電装置および送電装置、ならびにそれらの制御方法 |
JP2021129456A (ja) * | 2020-02-14 | 2021-09-02 | キヤノン株式会社 | 送電装置、受電装置、それらの制御方法、およびプログラム |
JP2021197768A (ja) | 2020-06-10 | 2021-12-27 | キヤノン株式会社 | 送電装置、送電装置の制御方法、およびプログラム |
WO2022130778A1 (ja) | 2020-12-17 | 2022-06-23 | キヤノン株式会社 | 送電装置、受電装置、それらの制御方法、およびプログラム |
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JP2023181742A (ja) | 2022-06-13 | 2023-12-25 | キヤノン株式会社 | 送電装置、送電装置の制御方法、およびプログラム |
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CN105409086A (zh) | 2016-03-16 |
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US10199866B2 (en) | 2019-02-05 |
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US20190123582A1 (en) | 2019-04-25 |
KR101976909B1 (ko) | 2019-05-09 |
US20160197513A1 (en) | 2016-07-07 |
CN105409086B (zh) | 2018-01-23 |
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