US 9,287,719 B2 · Power supply side equipment and resonance-type non-contact power supply system

Abstract

Power supply side equipment comprises a high-frequency power supply, a matching box, a primary side resonance coil, an output impedance variable unit, a matching state detection unit, and a control unit. By a magnetic field resonance, the primary side resonance coil transmits power in a non-contact manner to a load through a secondary side resonance coil. At least the matching box, the primary side resonance coil, the secondary side resonance coil, and the load constitute a resonance system having a resonant frequency. The matching state detection unit detects the matching state between the input impedance of the resonance system and the output impedance of the high-frequency power supply at the resonant frequency. The control unit adjusts the output impedance variable unit and the matching box according to the detection result by the matching state detection unit so that the input impedance of the resonance system and the output impedance of the high-frequency power supply match each other.

Claims10

Dependent claims

Power supplying equipment comprising:

a high frequency power supply;
an impedance matching device connected to an output portion of the high frequency power supply;
a primary resonance coil supplied with power from the high frequency power supply via the impedance matching device, wherein the primary resonance coil transmits power in a contactless manner to a load via a secondary resonance coil through magnetic field resonance, and at least the impedance matching device, the primary resonance coil, the secondary resonance coil, and the load form a resonance system having a resonant frequency;
an output impedance varying unit arranged in the high frequency power supply;
an impedance matching status detection unit that detects an impedance matching status between an input impedance of the resonance system at the resonant frequency and an output impedance of the high frequency power supply;
and
a control unit that performs adjustment on the output impedance varying unit and the impedance matching device based on a detection result of the impedance matching status detection unit so that the input impedance of the resonance system is matched with the output impedance of the high frequency power supply.

4 more elements

A resonance type contactless power supplying system comprising:

power supplying equipment including a high frequency power supply, an impedance matching device connected to an output portion of the high frequency power supply, and a primary resonance coil supplied with power from the high frequency power supply via the impedance matching device;
mobile body equipment including a secondary resonance coil, which receives power from the primary resonance coil through magnetic field resonance, and a load, which is supplied with power received by the secondary resonance coil, wherein at least the impedance matching device, the primary resonance coil, the secondary resonance coil, and the load form a resonance system having a resonant frequency;
an output impedance varying unit arranged in the high frequency power supply;
an impedance matching status detection unit that detects a matching status between an input impedance of the resonance system at the resonant frequency and an output impedance of the high frequency power supply;
and
a control unit that performs adjustment on the output impedance varying unit and the impedance matching device based on a detection result of the impedance matching status detection unit so that the input impedance of the resonance system is matched with the output impedance of the high frequency power supply.

3 more elements

Dependencies are inferred from the claim text.

Power supply side equipment and resonance-type non-contact power supply system

Life of this patent

Power supply side equipment and resonance-type non-contact power supply system

Life of this patent

Abstract

Claims10