Inductive power transfer pick up circuits
First Claim
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1. An inductive power transfer (IPT) pick-up circuit for receiving power from a primary conductor at a selected operating frequency, the circuit comprising:
- a pick-up coil and a compensation capacitor;
a switch controllable between an operable state and an inoperable state;
a plurality of additional reactive elements whereby when the switch is in one of the operable or inoperable states the additional reactive elements are resonant at the selected operating frequency to substantially reduce or prevent power being supplied to an output of the pick-up circuit.
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Accused Products
Abstract
An inductive power transfer (IPT) pick-up circuit for receiving power from a primary conductor has a pick-up coil (L2) and a compensation capacitor (C2) so that the pick-up coil (L2) may be resonant at the system operating frequency a switch (S1, S2), and a plurality of reactive elements (L3, C3) whereby when the switch is in one of an on state or an off state the additional reactive elements (L3, C3) are resonant at the operating frequency to reduce power being supplied to an output of the pick-up circuit.
6 Citations
16 Claims
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1. An inductive power transfer (IPT) pick-up circuit for receiving power from a primary conductor at a selected operating frequency, the circuit comprising:
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a pick-up coil and a compensation capacitor; a switch controllable between an operable state and an inoperable state; a plurality of additional reactive elements whereby when the switch is in one of the operable or inoperable states the additional reactive elements are resonant at the selected operating frequency to substantially reduce or prevent power being supplied to an output of the pick-up circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method in controlling an inductive power transfer (IPT) pick-up circuit having a pick-up coil and a compensation capacitor, the method comprising:
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operating a switch to cause one or more additional reactive components to become resonant to thereby control power supply to a load; and disposing the switch in one of an operable or inoperable state to cause the reactive elements to be resonant to substantially prevent power being supplied to an output of the pick-up circuit. - View Dependent Claims (15, 16)
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Specification