Inductive power transmitter
OwnerPaul David MARSON, Lewis Freeth HARPHAM +1inventors
InventorsPaul David MARSON, Lewis Freeth HARPHAM, Zachary Strachan HARRIS
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Abstract
An object detection system 200 for an inductive power transmitter and comprising: an excitation coil 202; a detection coil 204; the system arranged to determine a measure of complex impedance at the detection coil 204 in response to application of an excitation current to the excitation coil 202; the system further arranged to detect the presence of an object and a type of the object using the measure of complex impedance.
Claims23
An object detection system for an inductive power transmitter and comprising:
- an excitation coil;
- a detection coil;
- the system arranged to determine a measure of complex impedance at the detection coil in response to application of an excitation current to the excitation coil;
- the system further arranged to detect the presence of an object and a type of the object using the measure of complex impedance.
An inductive power transmitter comprising:
- at least one power transmitting coil configured to generate an inductive power transfer (IPT) field;
- and
- an object detection system configured to detect objects in or adjacent to the IPT field;
- wherein the object detection system is substantially decoupled from the IPT field.
(canceled)
-30. (canceled)
A method of detecting the presence and a type of an object proximate an inductive power transmitter, and comprising:
- determining a measure of complex impedance at a detection coil in response to application of an excitation current to an excitation coil, both coils proximate the inductive power transmitter;
- detecting the presence of an object and the type of the object using the measure of complex impedance.
(canceled)
Dependencies are inferred from the claim text.