Non-contact power supply system
First Claim
1. A non-contact power supply system capable of transmitting electric power by a magnetic field resonance method from a power transmission device including a power transmission-side resonant circuit to a power reception device including a power reception-side resonant circuit, whereinthe power transmission device includes:
- a load detection circuit arranged to detect a magnitude of a load in the power transmission; and
a control circuit arranged to perform power transmission control based on a detection result of the load detection circuit,wherein the power reception device includes;
a load circuit;
a power reception circuit arranged to output, toward the load circuit, electric power based on received electric power received by the power reception-side resonant circuit; and
a suppressor circuit interposed between the power reception circuit and the load circuit, andwherein the suppressor circuit comprises a constant-resistance circuit which comprises two bipolar transistors or MOSFETs forming a current mirror circuit, and the suppressor circuit is arranged to operate such that output power of the power reception circuit is maintained constant even though power consumption of the load circuit varies.
1 Assignment
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Accused Products
Abstract
Disclosed is a non-contact power supply system wherein power is transmitted by means of a magnetic field resonance method from a power transmission device, which includes a power transmission-side resonant circuit, to a power reception device, which includes a power reception-side resonant circuit. The power transmission device detects, at the time of transmitting the power, a load in the power transmission, and stops the power transmission in the cases where a detection result deviates from a specified normal range. In the power reception device, a power stabilization circuit (270) that maintains output power of the power reception circuit constant is provided between a load circuit (280) and a power reception circuit (230) that outputs, toward the load circuit, power on the basis of power received by the power reception-side resonant circuit.
23 Citations
9 Claims
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1. A non-contact power supply system capable of transmitting electric power by a magnetic field resonance method from a power transmission device including a power transmission-side resonant circuit to a power reception device including a power reception-side resonant circuit, wherein
the power transmission device includes: -
a load detection circuit arranged to detect a magnitude of a load in the power transmission; and a control circuit arranged to perform power transmission control based on a detection result of the load detection circuit, wherein the power reception device includes; a load circuit; a power reception circuit arranged to output, toward the load circuit, electric power based on received electric power received by the power reception-side resonant circuit; and a suppressor circuit interposed between the power reception circuit and the load circuit, and wherein the suppressor circuit comprises a constant-resistance circuit which comprises two bipolar transistors or MOSFETs forming a current mirror circuit, and the suppressor circuit is arranged to operate such that output power of the power reception circuit is maintained constant even though power consumption of the load circuit varies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification