Contactless electrical energy transmission system having a...

Details Contactless electrical energy transmission system having a... Contactless electrical energy transmission system having a...

2005-08-23

2005-08-23

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S021030, C363S097000

Reexamination Certificate

active

06934167

ABSTRACT:
A contactless electrical energy transmission system includes a transformer having a primary winding that is coupled to a power source through a primary resonant circuit and a secondary winding that is coupled to a load through a secondary resonant circuit. The primary and secondary resonant circuits are inductively coupled to each other. A primary control circuit detects current changes through the primary resonant circuit to control the switching frequency of a controllable switching device for maintaining a substantially constant energy transfer between the primary winding and secondary winding in response to at least one of a power source voltage change and a load change. As a result, excessive circulating energy of the CEET system is minimized providing a tight regulation of the output voltage over the entire load and input voltage ranges without any feedback connection between the primary side and the secondary side.

REFERENCES:
patent: 4535399 (1985-08-01), Szepesi
patent: 6246599 (2001-06-01), Jang et al.
patent: 6301128 (2001-10-01), Jang et al.
patent: 6490176 (2002-12-01), Holzer et al.
patent: 2004/0145342 (2004-07-01), Lyon
patent: 1220438 (2002-07-01), None

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