Method and device for detecting a device in a wireless power transmission system
First Claim
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1. A method of detecting a receiver by a transmitter via a capacitance change, the method comprising:
- providing, in the transmitter, a first transmission coil as a first electrode;
providing, in the transmitter, a second electrode;
forming a capacitor by the first electrode and the second electrode of the transmitter;
applying a voltage to any one of the electrodes;
determining a position of the receiver with respect to the transmitter when the capacitance change of the capacitor is detected based on a current flowing through the capacitor.
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Abstract
A method of detecting a receiver (214) by a transmitter and a transmitter for detecting a receiver are provided. The transmitter is intended to transmit power inductively to the receiver (214). The transmitter comprising a first transmission coil as a first electrode (204) and a second electrode (206). The first electrode (204) and the second electrode (206) form a capacitor (202). The method comprises the steps of applying a voltage (216) to any one of the electrodes (204, 206) and detecting a capacitance change of the capacitor (202).
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Citations
15 Claims
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1. A method of detecting a receiver by a transmitter via a capacitance change, the method comprising:
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providing, in the transmitter, a first transmission coil as a first electrode; providing, in the transmitter, a second electrode; forming a capacitor by the first electrode and the second electrode of the transmitter; applying a voltage to any one of the electrodes; determining a position of the receiver with respect to the transmitter when the capacitance change of the capacitor is detected based on a current flowing through the capacitor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transmitter for detecting a receiver via a capacitance change, the transmitter comprising:
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a first transmission coil as a first electrode; a second electrode forming a capacitor with the first electrode; a voltage source configured to apply a voltage to any one of the first or second electrodes; and a detection circuitry connected to any one of the first or second electrodes for detecting the capacitance change of the capacitor based on a current flowing through the capacitor such that a position of the receiver is determined with respect to the transmitter. - View Dependent Claims (8, 9, 10, 13, 14, 15)
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11. A method of detecting a receiver by a transmitter via a capacitance change, the method comprising:
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providing, in the transmitter, a first transmission coil as an electrode; applying a voltage to the electrode; and detecting a capacitance change of a capacitor based on a current flowing through the capacitor, wherein the capacitor is formed by the electrode and a ground or the capacitor is formed by the electrode and the receiver, such that a position of the receiver is determined with respect to the transmitter.
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12. A transmitter for detecting a receiver via a capacitance change, the transmitter comprising:
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a first transmission coil as an electrode, a voltage source configured to apply a voltage to the electrode; and a detection circuitry connected to the first electrode for detecting the capacitance change of a capacitor based on a current flowing through the capacitor such that a position of the receiver is determined with respect to the transmitter, wherein the capacitor is formed by the electrode and a ground or the capacitor is formed by the electrode and the receiver.
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Specification