Inductive power transmission and distribution apparatus using a coaxial transformer
First Claim
1. An inductive power transfer apparatus for transferring power from a power source comprising:
- a primary conductor having a longitudinal axis, the primary conductor extending in the longitudinal direction, the primary conductor having a first end and a second end;
a return conductor surrounding the primary conductor and spaced apart therefrom;
a first support element configured and arranged to secure the center conductor in place;
the primary conductor electrically coupled to the power source and receiving power therefrom and the primary conductor further electrically coupled to the return conductor, the return conductor being electrically coupled to the power source to provide a return path thereto;
a moveable secondary winding including a high permeability toroidal core coaxially disposed about the center conductor and spaced apart therefrom forming a first air gap, the toroidal core including a second air gap, the first support element disposed within the second air gap, the secondary winding further including a multi-turn coil disposed radially about a portion of the high permeability toroidal core;
a second support element configured and arranged to support the high permeability core and the multi-turn coil; and
whereby an alternating current imposed upon the primary conductor by the power source generates a magnetic field that is magnetically coupled to the multi-turn coil and induces a voltage therein.
4 Assignments
0 Petitions
Accused Products
Abstract
A coaxial inductive power transfer and distribution apparatus includes a stationary primary conductor and a mobile secondary coil magnetically coupled together to provide for inductive power transfer therebetween. A return conductor that is stationary is mechanically coupled to the primary conductor and ensures the position stability of the primary conductor with respect to the moveable secondary coil. The return conductor also includes an air gap in which a support member for the mobile secondary coil is disposed within. The mobile secondary winding includes a high permeability toroidal core that is coaxially disposed about, and spaced apart from, the primary conductor. A multi-turn coil is radially disposed about the high permeability toroidal core. The support member for the mobile secondary winding extends through the air gap in the return conductor to the exterior of the return conductor, where it may be coupled to an electric vehicle.
55 Citations
11 Claims
-
1. An inductive power transfer apparatus for transferring power from a power source comprising:
-
a primary conductor having a longitudinal axis, the primary conductor extending in the longitudinal direction, the primary conductor having a first end and a second end;
a return conductor surrounding the primary conductor and spaced apart therefrom;
a first support element configured and arranged to secure the center conductor in place;
the primary conductor electrically coupled to the power source and receiving power therefrom and the primary conductor further electrically coupled to the return conductor, the return conductor being electrically coupled to the power source to provide a return path thereto;
a moveable secondary winding including a high permeability toroidal core coaxially disposed about the center conductor and spaced apart therefrom forming a first air gap, the toroidal core including a second air gap, the first support element disposed within the second air gap, the secondary winding further including a multi-turn coil disposed radially about a portion of the high permeability toroidal core;
a second support element configured and arranged to support the high permeability core and the multi-turn coil; and
whereby an alternating current imposed upon the primary conductor by the power source generates a magnetic field that is magnetically coupled to the multi-turn coil and induces a voltage therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification