Wireless power-supplying system
First Claim
1. A wireless power-supplying system comprising:
- a power-transmitting device that includes a power-transmitting coil to which AC power of a certain frequency is input from a power supply;
a controller which controls the frequency;
a power-receiving device that includes;
a power-receiving coil which is magnetically coupled with the power-transmitting coil with a certain coupling coefficient, anda power-receiving side series element connected to the power-receiving coil in series and having an imaginary impedance jZS2i, wherein the imaginary impedance is independent of the coupling coefficient when the frequency and the coupling coefficient are predetermined values, anda fixed load that is connected to the power-receiving device as a power-supply target,wherein, in response to the coupling coefficient changing, the controller is configured to change-the frequency according to Equation (1);
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Accused Products
Abstract
A wireless power-supplying system according to the present disclosure includes a power-transmitting device and a power-receiving device. The power-transmitting device includes a power-transmitting coil to which AC power of a certain frequency is input from a power supply and a controller which controls a frequency. The power-receiving device includes a power-receiving coil magnetically coupled with the power-transmitting coil with a certain coupling coefficient and a power-receiving side series element connected to the power-receiving coil in series and having imaginary impedance jZS2i. The imaginary impedance is defined so that impedance when a power-receiving side is seen from the power supply is independent of the coupling coefficient when the frequency and the coupling coefficient are predetermined values. The controller changes the frequency according to at least one of power-transmitting status information of the power-transmitting device and power-receiving status information of the power-receiving device when the coupling coefficient changes.
11 Citations
19 Claims
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1. A wireless power-supplying system comprising:
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a power-transmitting device that includes a power-transmitting coil to which AC power of a certain frequency is input from a power supply; a controller which controls the frequency; a power-receiving device that includes; a power-receiving coil which is magnetically coupled with the power-transmitting coil with a certain coupling coefficient, and a power-receiving side series element connected to the power-receiving coil in series and having an imaginary impedance jZS2i, wherein the imaginary impedance is independent of the coupling coefficient when the frequency and the coupling coefficient are predetermined values, and a fixed load that is connected to the power-receiving device as a power-supply target, wherein, in response to the coupling coefficient changing, the controller is configured to change-the frequency according to Equation (1);
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2. A wireless power-supplying system comprising:
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a power-transmitting device that includes a power-transmitting coil to which AC power of a certain frequency is input from a power supply; a controller which controls the frequency;
a power-receiving device that includes;a power-receiving coil which is magnetically coupled with the Dower-transmitting coil with a certain coupling coefficient, and a power-receiving side series element connected to the power-receiving coil in series and having an imaginary impedance jZS2i wherein the imaginary impedance is independent of the coupling coefficient when the frequency and the coupling coefficient are predetermined values; and a fixed load that is connected to the power-receiving device as a power-supply target, and wherein, in response to the coupling coefficient changing, the controller is configured to change the frequency according to Equation (2);
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3. A wireless power-supplying system comprising:
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a power-transmitting device that includes a power-transmitting coil to which AC power of a certain frequency is input from a power supply; a controller that controls the frequency; a power-receiving device that includes; a power-receiving coil which is magnetically coupled with the power-transmitting coil with a certain coupling coefficient, and a power-receiving side series element connected to the power-receiving coil in series and having an imaginary impedance jZS2i, wherein the imaginary impedance satisfies Equation (1) when the frequency and the coupling coefficient are predetermined initial values, wherein Equation (1) is represented by; - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification