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US 2025/0055382 A1Published application
Fixed frequency resonant inverter
AssigneeMyrtle Holdings, LLC
InventorL. Dexter Bates
Life of this patent
Estimating the term…
Abstract
A self-oscillating electronic LC resonant inverter for use in fixed-frequency power converters, providing zero-current and zero-voltage soft switching. The inverter incorporates an active fixed-frequency series resonant current pump capable of pumping the tank circuit current up as well as down. The magnitude of the resonant current is controlled at the resonant frequency of the LC tank circuit.
Claims18
An apparatus, comprising:
- an LC tank circuit characterized by a natural frequency comprising an inductor and a capacitor connected in series;
- a switching circuit to drive the LC tank circuit;
- and
- a feedback controller to sense a characteristic of the LC tank circuit and to drive the switching circuit,
- wherein the whole apparatus oscillates of its own accord at the natural frequency of the LC tank circuit.
2 more elements
A method, comprising:
- driving a series resonant LC tank circuit characterized by a natural frequency with a switching circuit;
- and
- driving the switching circuit with a feedback controller adapted to sense a phase of the current flowing in the LC tank circuit;
- whereby the LC tank circuit, switching circuit, and feedback controller together oscillate as a composite at the natural frequency of the LC tank circuit.
1 more element
An apparatus, comprising:
- an LC tank circuit characterized by a natural frequency comprising an inductor and a capacitor connected in series;
- a switching circuit to drive the LC tank circuit;
- a feedback controller to drive the switching circuit;
- a feedback circuit to sense a characteristic of the LC tank circuit and to drive the switching circuit;
- wherein the LC tank circuit, switching circuit, and feedback controller together oscillate as a composite at the natural frequency of the LC tank circuit;
- and
- an output switching circuit to provide a direct current voltage output.
4 more elements
A method, comprising:
- driving a series resonant LC tank circuit characterized by a natural frequency with a switching circuit;
- driving the switching circuit with a feedback controller adapted to sense a phase of the current flowing in the LC tank circuit;
- wherein the LC tank circuit, switching circuit, and feedback controller together oscillate as a composite at the natural frequency of the LC tank circuit;
- and
- driving an output switching circuit to provide a direct current output voltage.
2 more elements
An apparatus, comprising:
- an LC tank circuit characterized by a natural frequency comprising an inductor and a capacitor connected in series;
- a switching circuit to drive the LC tank circuit;
- a feedback controller to drive the switching circuit;
- a feedback circuit to sense a characteristic of the LC tank circuit;
- wherein the LC tank circuit, switching circuit, and feedback controller together oscillate as a composite at the natural frequency of the LC tank circuit;
- and
- an interface configured to drive a secondary coil and rectification circuit to charge a power source.
4 more elements
A method, comprising:
- driving a series resonant LC tank circuit characterized by a natural frequency with a switching circuit;
- driving the switching circuit with a feedback controller adapted to sense a phase of the current flowing in the LC tank circuit;
- wherein the LC tank circuit, switching circuit, and feedback controller together oscillate as a composite at the natural frequency of the LC tank circuit;
- and
- driving a secondary coil and rectification circuit to charge a power source.
2 more elements
A method, comprising:
- driving a series resonant LC tank circuit characterized by a natural frequency with a switching circuit;
- and
- driving the switching circuit with a feedback controller adapted to sense a characteristic of the LC tank circuit;
- whereby the LC tank circuit, switching circuit, and feedback controller together oscillate as a composite at the natural frequency of the LC tank circuit.
1 more element
Dependencies are inferred from the claim text.