Resonant power factor correction converter
First Claim
Patent Images
1. A power converter comprising:
- a. a single-stage power-factor-correction resonant converter configured to receive an input voltage, wherein the single-stage power-factor-correction resonant converter includes an isolation transformer and a resonant tank;
b. a rectifier coupled to an output of the isolation transformer; and
c. a bulk capacitor coupled to an output of the rectifier, wherein a voltage across the bulk capacitor is a direct-current output voltage of the power converter.
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Abstract
An AC-to-DC power converter configured to provide power factor correction and a single isolated low-voltage output. The power converter includes a single-stage resonant power converter including an isolation transformer, a resonant tank, a rectifier, and a bulk storage capacitor coupled to an output of the isolation transformer. In typical applications, at least one non-isolated power converter is coupled to the output of the single-stage isolated power factor correction converter.
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Citations
79 Claims
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1. A power converter comprising:
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a. a single-stage power-factor-correction resonant converter configured to receive an input voltage, wherein the single-stage power-factor-correction resonant converter includes an isolation transformer and a resonant tank; b. a rectifier coupled to an output of the isolation transformer; and c. a bulk capacitor coupled to an output of the rectifier, wherein a voltage across the bulk capacitor is a direct-current output voltage of the power converter. - 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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21. An AC-to-DC power converter comprising:
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a. a bridge rectifier configured to receive an input AC voltage, wherein the bridge rectifier is configured to output a DC voltage corresponding to the input AC voltage; b. a single-stage power-factor-correction resonant converter coupled to the bridge rectifier to receive the DC voltage, wherein the single-stage power-factor-correction resonant converter includes an isolation transformer, a resonant tank, and a switchable bridge configured to operate as a half-bridge converter under high-line voltage conditions and to operate as a full-bridge converter under low-line voltage conditions; c. a rectifier coupled to an output of the isolation transformer; and d. a bulk capacitor coupled to an output of the rectifier, wherein a voltage across the bulk capacitor is an output DC voltage of the AC-to-DC power converter. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An AC-to-DC power converter comprising:
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a. a bridge rectifier configured to receive an input AC voltage, wherein the bridge rectifier is configured to output a DC voltage corresponding to the input AC voltage; b. a single-stage power-factor-correction resonant converter coupled to the bridge rectifier to receive the DC voltage, wherein the single-stage power-factor-correction resonant converter includes an isolation transformer and a resonant tank; c. a rectifier coupled to an output of the isolation transformer; d. a tap switch coupled to an output of the rectifier, wherein the tap switch is configured to increase and decrease a functional turns ratio of the isolation transformer; and e. a bulk capacitor coupled to the tap switch and to the output of the rectifier, wherein a voltage across the bulk capacitor is an output DC voltage of the AC-to-DC power converter. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. An AC-to-DC power converter comprising:
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a. a bridge rectifier configured to receive an input AC voltage, wherein the bridge rectifier is configured to output a DC voltage corresponding to the input AC voltage; b. a single-stage power-factor-correction resonant converter coupled to the bridge rectifier to receive the DC voltage, wherein the single-stage power-factor-correction resonant converter includes an isolation transformer, a resonant tank, and a switchable bridge configured to operate as a half-bridge converter under high-line voltage conditions and to operate as a full-bridge converter under low-line voltage conditions; c. a rectifier coupled to an output of the isolation transformer; d. a tap switch coupled to an output of the rectifier, wherein the tap switch is configured to increase and decrease a functional turns ratio of the isolation transformer; and e. a bulk capacitor coupled to the tap switch and to the output of the rectifier, wherein a voltage across the bulk capacitor is an output DC voltage of the AC-to-DC power converter. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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- 73. A power converter including a switchable bridge configured to convert a DC voltage to a high-frequency AC voltage, wherein the switchable bridge is further configured to operate as a full-bridge converter during a first voltage range of the DC voltage and to operate as a half-bridge converter during a second voltage range of the DC voltage.
Specification