Gte Sylvania Incorporated

Emf Industries, Inc.

Bruce L Bower

Gareth J Knowles

John J Murray

Raymond H Kohler

The present invention provides methods and systems for controlling transductive structures to achieve a desired performance objective. According to one aspect, the present invention provides a controller which simulates a synthetic admittance or impedance when coupled to a bicoupled device and effectively cancels the reactance of the bicoupled device. Cancelling the reactance of the bicoupled device allows energy to be reflected back into an energy storage portion of the circuit resulting in an energy efficient damping and/or control system.

Device and method for controlling transductive systems

An electronic ballast circuit includes a direct drive high frequency inverter circuit with a tuned output circuit and a drive circuit dependent upon current flow in a load circuit. The high frequency inverter circuit is coupled to a DC potential source which is derived from a pulsed DC potential source by way of a charge storage and charge isolating circuit. An oscillator provides a starting capability for the high frequency inverter circuit and is essentially removed from the active circuitry upon energization of the high frequency inverter circuit.

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Williamsport, PA, United States of America

Bruce L Bower