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US 5,293,308 AGranted
Inductive power distribution system
AssigneeAuckland Uniservices Limited
InventorsJohn T. Boys, Andrew W. Green
Life of this patent
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AssigneeAuckland Uniservices Limited
InventorsJohn T. Boys, Andrew W. Green
Estimating the term…
A contactless inductive power distribution system operating at 10 KHz has a self tuning resonant power supply connected to a resonant primary conductive path comprising a pair of parallel litz wire conductors each encapsulated within an insulated sheath and supported on a structural monorail beam on which a plurality of electric vehicles can run. Each vehicle has an electric motor capable of deriving power from a resonant pick-up coil wound on a ferrite core mounted on the vehicle in close proximity to the primary conductors. Each vehicle also has switching means capable of preventing a lightly loaded vehicle from presenting a reduced load to the resonant primary. In one version this comprises an isolating coil having a switch to switch the coil between an open circuit and a short circuit, so that when the switch is switched from one state to another state the power coupled between the primary conductive path and the pick-up coil is changed.
An inductive power distribution system comprising:
An inductive power distribution system comprising:
A vehicle capable of deriving some of its power from a magnetic field associated with a primary conductive path supplied by a varying electric current, said vehicle having at least one pick-up coil comprising a pick-up coil comprising a resonant circuit having a pick-up resonant frequency, and at least one output load capable of being driven by electric power induced in the pick-up coil, wherein there is means for changing the power coupled between the primary conductive path and the pick-up coil.
An inductive power distribution system comprising:
Dependencies are inferred from the claim text.