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US 11,152,847 B2Granted
Energy injection in a resonant circuit with initial conditions
AssigneeRompowerTechnology Holdings, LLC
InventorIonel Jitaru
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Abstract
In this invention we introduce the concept of energy injection in a resonant circuit with initial conditions which is part of almost all of the present topologies. The patent will present in details several methods of energy injection in a resonant circuit with initial conditions and how it is applies to different topologies. The patent presents also a simple and economical method of driving the clamp switch in a flyback topology operating in discontinuous mode and a bias circuit in a flyback topology wherein the output voltage varies over a large range.
Claims5
A resonant circuit formed in a power converter and comprising:
- an input voltage source;
- an inductive element;
- and
- a parasitic capacitance across a switching element of said power converter;
- wherein the resonant circuit is characterized by initial conditions, the initial conditions including an initial current through the inductive element and an initial voltage across the parasitic capacitance, and the resonant circuit is configured to receive energy injected from an independent voltage source, wherein said energy is derived from one of:
- 1) an energy source different than the input voltage source;
- and 2) the input voltage source but not during a switching cycle while energy injection occurs.
4 more elements
Dependencies are inferred from the claim text.