Inductive power distribution system
First Claim
1. An inductive power distribution system comprising:
- an electric power supply,a primary conductive path connected to said electric power supply;
one or more electrical devices for use in conjunction with said primary conductive path;
the or each device capable of deriving at least some power from a magnetic field associated with said primary conductive path;
the or each device having at least one 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 the or each device comprises control means to at least partly decouple said pick-up coil from said primary conductive path.
3 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
44 Claims
-
1. An inductive power distribution system comprising:
-
an electric power supply, a primary conductive path connected to said electric power supply; one or more electrical devices for use in conjunction with said primary conductive path;
the or each device capable of deriving at least some power from a magnetic field associated with said primary conductive path;the or each device having at least one 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 the or each device comprises control means to at least partly decouple said pick-up coil from said primary conductive path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. An inductive power distribution system comprising:
-
an electric power supply; a primary conductive path connected to said electric power supply; one or more vehicles for use in conjunction with said primary conductive path;
the or each vehicle capable of deriving at least some of its power from a magnetic field associated with said primary conductive path;the or each vehicle having at least one 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, and wherein the or each device comprises control means to at least partly decouple said pick-up coils from said primary conductive path. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
-
43. 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.
-
44. An inductive power distribution system comprising:
-
an electric power supply; a primary conductive path connected to said electric power supply; one or more electrical devices for use in conjunction with said primary conductive path;
the or each device capable of deriving at least some power from a magnetic field associated with said primary conductive path;the or each device having at least one 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, and including control means to vary the coupling between said pick-up coil and said primary conductive path.
-
Specification