Supply of power to primary conductors
First Claim
1. An apparatus for the supply of power from an alternating power source to the primary conductors of an inductive power transfer system having at least one series compensated primary trackway, each primary trackway having an inherent resonant frequency, wherein said apparatus comprises at least one reactive network having an input and an output;
- the network being connected between the power source and said at least one primary trackway, wherein said network comprises at least one inductance having a selected value and connected to at least one capacitance having a selected value, and wherein said network controls transfer of power between the supply of power and the at least one primary trackway.
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Accused Products
Abstract
Apparatus for providing effective amounts of high-frequency AC power to a long primary trackway (1102), used for inductive power transfer includes transconductance-pi filters (1105) for deliberate mismatching; resulting in independence of current flow and track impedance. These cause the source (1101) to appear as a voltage source and the trackway to appear as a low reactance. Shorting the output (1106) cuts the connected trackway from power without harm. The filter can cause a voltage step-up so driving a longer track. Track termination apparatus is disclosed that acts as a short circuit at only the operating frequency while terminating the track at its characteristic impedance otherwise. Half-bridge and full-bridge power supplies (1101) are described for providing effective amounts of high-frequency AC power to a long primary trackway used for inductive power transfer.
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Citations
14 Claims
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1. An apparatus for the supply of power from an alternating power source to the primary conductors of an inductive power transfer system having at least one series compensated primary trackway, each primary trackway having an inherent resonant frequency, wherein said apparatus comprises at least one reactive network having an input and an output;
- the network being connected between the power source and said at least one primary trackway, wherein said network comprises at least one inductance having a selected value and connected to at least one capacitance having a selected value, and wherein said network controls transfer of power between the supply of power and the at least one primary trackway.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification