High power converter architecture
First Claim
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1. A power converter circuit comprising:
- a. a transformer having a primary winding coupled to an input supply voltage and a secondary winding;
b. an output circuit coupled to the secondary winding;
c. a primary switch coupled in series to the primary winding;
d. a resonant circuit coupled in parallel to the primary winding, wherein the resonant circuit comprises an auxiliary switch and a resonant tank; and
e. a controller coupled to the primary switch, wherein the power converter circuit is configured to forward energy from the input supply voltage to the output circuit when the primary switch is ON, to store energy from leakage inductance, magnetizing inductance, and parasitic capacitances as resonant energy in the resonant tank, and to deliver the stored resonant energy to the output circuit.
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Abstract
The power converter is an integration of three topologies which include a forward converter topology, a flyback converter topology, and a resonant circuit topology. The combination of these three topologies functions to transfer energy using three different modes. A first mode, or forward mode, is a forward energy transfer that forwards energy from the input supply to the output load in a manner similar to a forward converter. A second mode, or flyback mode, stores and releases energy in a manner similar to a flyback converter. A third mode, or resonant mode, stores and releases energy from the resonant tank using a resonant circuit and a secondary side forward-type converter topologies.
137 Citations
23 Claims
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1. A power converter circuit comprising:
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a. a transformer having a primary winding coupled to an input supply voltage and a secondary winding; b. an output circuit coupled to the secondary winding; c. a primary switch coupled in series to the primary winding; d. a resonant circuit coupled in parallel to the primary winding, wherein the resonant circuit comprises an auxiliary switch and a resonant tank; and e. a controller coupled to the primary switch, wherein the power converter circuit is configured to forward energy from the input supply voltage to the output circuit when the primary switch is ON, to store energy from leakage inductance, magnetizing inductance, and parasitic capacitances as resonant energy in the resonant tank, and to deliver the stored resonant energy to the output circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power converter circuit comprising:
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a. a transformer having a primary winding coupled to an input supply voltage and a secondary winding; b. an output circuit coupled to the secondary winding, wherein the output circuit comprises a first diode, a second diode, and a capacitor, the first diode and the second diode are coupled to the secondary winding of the transformer such that when the first diode is forward biased, the second diode is reverse biased, and when the first diode is reverse biased, the second diode is forward biased; c. a primary switch coupled in series to the primary winding; d. a resonant circuit coupled in parallel to the primary winding, wherein the resonant circuit comprises an auxiliary switch and a resonant tank; d. driving circuitry coupled to the auxiliary switch and to the primary switch, wherein the driving circuitry is configured to parametrically control the auxiliary switch according to a voltage condition of the primary switch; and e. a controller coupled to the primary switch, wherein the power converter circuit is configured to forward energy from the input supply voltage to the output circuit, to store energy from leakage inductance, magnetizing inductance, and parasitic capacitances as resonant energy in the resonant tank, and to deliver the stored resonant energy to the output circuit.
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13. A method of transferring energy using a power converter, wherein the power converter comprises a transformer having a primary winding coupled to an input supply voltage and a secondary winding, an output circuit coupled to the secondary winding, and a primary switch coupled in series to the primary windings, the method comprises:
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a. forwarding energy from the input supply voltage to the output circuit while the primary switch is ON; b. forming a resonant tank including the primary winding when the primary switch is OFF, wherein the resonant tank includes resonant energy derived from stored magnetizing inductance, stored leakage inductance and parasitic capacitances; and c. delivering the resonant energy in the resonant tank to the output circuit while the primary switch is OFF. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification