Resonant Power Processors, Part II-Methods of Control

Abstract
The nature of resonant converter control is discussed. Employing the state portrait, different control methods for series resonant converter are identified and their performance evaluated based on their stability, response to control and load changes and range of operation. A new control method, optimal trajectory control, is proposed which, by utilizing the state trajectories as control laws, continuously monitors the energy level of the resonant tank. The method is shown to have superior control properties, especially under transient operation.

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