Contactless power feeding system
First Claim
1. A contactless power feeding system comprising:
- a power transmitting device comprising;
a first AC power source configured to generate a first AC power with a first frequency;
a second AC power source configured to generate a second AC power with a second frequency which is different from the first frequency;
a first electromagnetic induction coil;
a first resonant coil;
a switch electrically connected to the first electromagnetic induction coil, the switch being configured to control switching a connection to the first electromagnetic induction coil between the first AC power source and the second AC power source; and
a control circuit configured to control the switch; and
a power receiving device comprising a power storage unit, a second electromagnetic induction coil, and a second resonant coil,wherein the first electromagnetic induction coil is configured to resonate with the second electromagnetic induction coil at the first frequencywherein the first resonant coil is configured to resonate with the second resonant coil at the second frequency, andwherein the power storage unit is configured to store a power supplied from the second AC power source through the first electromagnetic induction coil and the first resonant coil.
1 Assignment
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Accused Products
Abstract
A contactless power feeding system includes a power transmitting device and a power receiving device. The power transmitting device includes a first AC power source configured to generate an AC power with a first frequency, a second AC power source configured to generate an AC power with a second frequency which is different from the first frequency, a first electromagnetic induction coil, and a first resonant coil. The power receiving device includes a second resonant coil, a second electromagnetic induction coil, and a power storage unit. Power is wirelessly supplied to the power storage unit at the second frequency by a magnetic resonance phenomenon which occurs between the first resonant coil and the second resonant coil.
58 Citations
17 Claims
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1. A contactless power feeding system comprising:
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a power transmitting device comprising; a first AC power source configured to generate a first AC power with a first frequency; a second AC power source configured to generate a second AC power with a second frequency which is different from the first frequency; a first electromagnetic induction coil; a first resonant coil; a switch electrically connected to the first electromagnetic induction coil, the switch being configured to control switching a connection to the first electromagnetic induction coil between the first AC power source and the second AC power source; and a control circuit configured to control the switch; and a power receiving device comprising a power storage unit, a second electromagnetic induction coil, and a second resonant coil, wherein the first electromagnetic induction coil is configured to resonate with the second electromagnetic induction coil at the first frequency wherein the first resonant coil is configured to resonate with the second resonant coil at the second frequency, and wherein the power storage unit is configured to store a power supplied from the second AC power source through the first electromagnetic induction coil and the first resonant coil. - View Dependent Claims (2, 3, 4, 5)
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6. A contactless power feeding system comprising:
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a power transmitting device comprising; a first AC power source configured to generate a first AC power with a first frequency; a second AC power source configured to generate a second AC power with a second frequency which is different from the first frequency; a first electromagnetic induction coil configured to transmit the first AC power; a first resonant coil configured to receive the first AC power transmitted from the first electromagnetic induction coil; a first switch electrically connected to the first electromagnetic induction coil, the first switch being configured to control switching a connection to the first electromagnetic induction coil between the first AC power source and the second AC power source; and a first control circuit configured to control the first switch; and a power receiving device comprising; a second electromagnetic induction coil configured to communicate with the first electromagnetic induction coil by electromagnetic coupling at the first frequency; a second resonant coil configured to communicate with the first resonant coil by a magnetic resonance phenomenon which occurs at the second frequency; a second control circuit configured to generate a response signal; a power storage unit; and a charge control circuit, wherein the power storage unit is configured to store a power transmitted from the second AC power source through the first electromagnetic induction coil, the first resonant coil, the second resonant coil, and the second electromagnetic induction coil, and wherein the charge control circuit is configured to control charging of the power storage unit. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A contactless power feeding system comprising:
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a power transmitting device comprising; a frequency-variable AC power source configured to generate a first AC power with a first frequency and a second AC power with a second frequency; a first electromagnetic induction coil; a first resonant coil; and a control circuit configured to control the frequency-variable AC power source whether the frequency-variable AC power source supplies the first AC power or the second AC power; and a power receiving device comprising a power storage unit, a second electromagnetic induction coil, and a second resonant coil, wherein the first electromagnetic induction coil is configured to resonate with the second electromagnetic induction coil at the first frequency wherein the first resonant coil is configured to resonate with the second resonant coil at the second frequency, and wherein the power storage unit is configured to store a power supplied from the frequency-variable AC power source through the first electromagnetic induction coil and the first resonant coil. - View Dependent Claims (14, 15, 16, 17)
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Specification