AN APPARATUS AND A METHOD FOR WIRELESS TRANSMISSION OF POWER BETWEEN DC VOLTAGE SOURCES
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Accused Products
Abstract
An apparatus for wireless transmission of power from a DC voltage source to a DC voltage load, includes: one primary coil coupled with one secondary coil, the primary coil and the secondary coil each equipped with at least one capacitor, so that the primary coil resonates at a frequency that at least equal the secondary coil resonant frequency; the resonant coils are mutually moveable; a converter that converts the DC voltage at a primary side to an AC voltage of controllable magnitude and frequency; at least one rectifier at the secondary side converts the AC voltage at the terminals of the secondary coil to a DC voltage at the load on the secondary side; and a control system that regulates the power flow by changing the magnitude and frequency of the AC voltage at the terminals of the primary resonant coil.
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Citations
29 Claims
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1-14. -14. (canceled)
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15. An apparatus for wireless transmission of power from a DC voltage source to a DC voltage load, comprising:
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a) one primary coil and one secondary coil, the primary coil and the secondary coil each connected with means of capacitors configured to achieve a common resonance frequency, ω
0;b) said one primary coil and one secondary coil are mutually movable during operation; c) a DC/AC-converter converting the DC voltage at primary side to an AC voltage of controllable magnitude and frequency at the primary side; d) one rectifier at the secondary side converting the AC voltage at terminals of the secondary coil to a DC voltage at the load on the secondary side; e) a control system that regulates the power flow between the primary and the secondary coil and automatically adapts to changes in the mechanical positions of the two coils by changing in a coordinated way the magnitude and frequency of the AC voltage at the terminals of the primary coil during operation. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method for wireless transmission of power from a DC voltage source to a DC voltage load, comprising the steps of:
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a. loosely coupling one primary coil with one secondary coil, b. equipping each with a series-connected resonant capacitor, so that the coil on the primary side resonates at the same frequency as the one on the secondary side; c. arranging said resonant coils on the primary side and the secondary side so that mutual movement during operation is possible; d. providing a DC/AC-converter converting the DC voltage at primary side to an AC voltage of controllable magnitude and frequency; e. providing a rectifier that converts the AC voltage at the terminals of the resonant pickup coil at the secondary side to a DC voltage; f. providing a control system that regulates the power flow between the primary and secondary coil and automatically adapts to changes in the mechanical positions of the two coils by changing in a coordinated way the magnitude and frequency of the AC voltage at the terminals of the primary resonant coil; g. providing a load at pickup-side that has constant-voltage characteristics. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification