Power transmission unit of wireless power feeding device
First Claim
1. A power transmission unit of a wireless power feeding device disposed on a structural surface of a facility for wirelessly supplying electrical power using magnetic field resonance to two or more moving bodies moving on the structural surface, the power transmission unit of the wireless power feeding device comprising:
- a power transmission coil opposing a power receiving coil disposed in the moving body;
a high frequency generation unit having switching elements and generating a high frequency power to be supplied to the power transmission coil;
two or more sets of capacitor circuit groups having series capacitors connected in series with the power transmission coil and parallel capacitors connected in parallel with the switching elements, the capacitor circuit groups are disposed according to the number of the moving bodies and are set together with the power transmission coil so as to have different impedances to each other; and
a control unit that controls a switch for connecting and disconnecting the capacitor circuit groups according to the number of the moving bodies to which electrical power is supplied from the power transmission coil.
1 Assignment
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Accused Products
Abstract
A power transmission unit of a wireless power feeding device supplies power to two or more moving bodies wirelessly by using magnetic field resonance. The power transmission unit includes a power transmission coil, a high frequency generation unit, capacitor circuit groups, and a control unit. The capacitor circuit groups have series capacitors connected in series with the power transmission coil and parallel capacitors connected in parallel to the switching elements for generating a high frequency, and the capacitor circuit groups are set together with the power transmission coil so as to have different impedances to each other. The control unit that controls a switch for connecting and disconnecting the capacitor circuit groups according to the number of the moving bodies to which electrical power is supplied from the power transmission coil.
11 Citations
7 Claims
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1. A power transmission unit of a wireless power feeding device disposed on a structural surface of a facility for wirelessly supplying electrical power using magnetic field resonance to two or more moving bodies moving on the structural surface, the power transmission unit of the wireless power feeding device comprising:
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a power transmission coil opposing a power receiving coil disposed in the moving body; a high frequency generation unit having switching elements and generating a high frequency power to be supplied to the power transmission coil; two or more sets of capacitor circuit groups having series capacitors connected in series with the power transmission coil and parallel capacitors connected in parallel with the switching elements, the capacitor circuit groups are disposed according to the number of the moving bodies and are set together with the power transmission coil so as to have different impedances to each other; and a control unit that controls a switch for connecting and disconnecting the capacitor circuit groups according to the number of the moving bodies to which electrical power is supplied from the power transmission coil. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification