Power conversion
First Claim
1. A circuit comprising:
- a primary section comprising input terminals adapted to receive a DC input;
a secondary section comprising a parallel capacitance resonance section and an inverting section comprising bi-directional switches; and
a transformer coupling the primary and secondary sections, the transformer having a primary side and a secondary side;
wherein the primary section comprises a plurality of transistors in an H-bridge configuration comprising a first group of transistors on a first side of the bridge and a second group of transistors on a second side of the bridge opposite the first side of the bridge;
wherein the DC input is applied to the drain terminals of the first group of transistors;
wherein the source terminals of the first group of transistors, the drain terminals of the second group of transistors and the primary side of the transformer are connected;
wherein the source terminals of the second group of transistors are connected to form a return path for the current; and
wherein the parallel capacitance resonance section is connected across the secondary side and is in resonance with a resonant inductance including a leakage inductance of the transformer and wherein a voltage across the parallel capacitance resonance section is discontinuous haversine waveform with alternating polarity.
2 Assignments
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Accused Products
Abstract
Components, systems and methods for generating variable frequency AC voltage from a DC power supply are described. The components include a full-bridge (FB) parallel load resonant (PLR) converter which operates in discontinuous conduction mode. The PLR converter includes MOSFETs in an H-bridge configuration and employs a topology which minimizes inductance. The PLR converter can be coupled to a single or poly-phase bridge for use as an inverter. The inverter can be used to produce an AC sinusoidal waveform from a low voltage, high current DC power supply. Systems and techniques for modulating the output from the PLR converter to produce an AC sinusoidal waveform having desired characteristics, including frequency and voltage, are also provided. The PLR converter can also be coupled to a rectifier for use as a DC-DC converter.
62 Citations
20 Claims
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1. A circuit comprising:
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a primary section comprising input terminals adapted to receive a DC input; a secondary section comprising a parallel capacitance resonance section and an inverting section comprising bi-directional switches; and a transformer coupling the primary and secondary sections, the transformer having a primary side and a secondary side; wherein the primary section comprises a plurality of transistors in an H-bridge configuration comprising a first group of transistors on a first side of the bridge and a second group of transistors on a second side of the bridge opposite the first side of the bridge; wherein the DC input is applied to the drain terminals of the first group of transistors; wherein the source terminals of the first group of transistors, the drain terminals of the second group of transistors and the primary side of the transformer are connected; wherein the source terminals of the second group of transistors are connected to form a return path for the current; and wherein the parallel capacitance resonance section is connected across the secondary side and is in resonance with a resonant inductance including a leakage inductance of the transformer and wherein a voltage across the parallel capacitance resonance section is discontinuous haversine waveform with alternating polarity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification