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US 12,362,676 B2Granted
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.
Claims17
A power converter, 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 feedback controller is configured to pump an amplitude of an oscillation in the LC tank circuit up or down, wherein the feedback controller is configured to track the natural frequency of the LC tank circuit and to initiate and maintain operation of the power converter at the natural frequency of the LC tank circuit.
1 more element
A method in a power converter, 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 a current flowing in the LC tank circuit, wherein the feedback controller tracks the natural frequency of the LC tank circuit and initiates and maintains operation of the power converter at the natural frequency of the LC tank circuit.
A power converter, 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 circuit to sense a characteristic of the LC tank circuit and to drive the switching circuit;
- wherein the feedback circuit is configured to track the natural frequency of the LC tank circuit, and to initiate and maintain operation of the power converter at the natural frequency of the LC tank circuit, and to provide zero current and zero voltage switching;
- and
- an output switching circuit to provide a direct current voltage output.
3 more elements
A power converter, comprising:
- a switching circuit configured to drive a series resonant LC tank circuit characterized by a natural frequency;
- and
- a feedback controller adapted to sense a characteristic of the LC tank circuit configured to drive the switching circuit, wherein the feedback controller is configured to track the natural frequency of the LC tank circuit and to initiate and maintain operation of the power converter as a composite at the natural frequency of the LC tank circuit and the switching circuit and feedback controller operate without an independently oscillating clock.
A power converter, 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 feedback controller tracks the natural frequency of the LC tank circuit and initiates and maintains operation of the power converter as a composite at the natural frequency of the LC tank circuit and the switching circuit and feedback controller operate without an independently oscillating clock;
- and
- an interface configured to drive a secondary coil and rectification circuit to charge a power source.
3 more elements
A method in a power converter, 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 a current flowing in the LC tank circuit;
- wherein the feedback controller tracks the natural frequency of the LC tank circuit and initiates and maintains operation of the power converter as a composite at the natural frequency of the LC tank circuit and the switching circuit and feedback controller operate without an independently oscillating clock;
- and
- driving a secondary coil and rectification circuit to charge a power source.
2 more elements
A method in a power converter, 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;
- wherein the feedback controller tracks the natural frequency of the LC tank circuit and initiates and maintains operation of the power converter as a composite at the natural frequency of the LC tank circuit and the switching circuit and feedback controller operate without an independently oscillating clock.
1 more element
Dependencies are inferred from the claim text.