Series interleaved boost converter power factor correcting power supply
First Claim
1. A power factor correcting power supply comprising:
- a first boost converter that includes a first boost sub-circuit coupled with a second boost sub-circuit;
a second boost converter coupled in series with the first boost converter, where the second boost converter includes a third boost sub-circuit coupled with a fourth boost sub-circuit, and the first and second boost converters are configured to receive an input voltage and supply a boost voltage that is greater in magnitude than a peak magnitude of the input voltage, where the boost voltage is divided by a factor of at least four with the first, second, third, fourth sub-circuits; and
a power factor correction controller coupled with the first and second boost converters, where the power factor correction controller is configured to control the first and second boost converters with pulse width modulation and series interleave operation with the factor of at least four as a function of the boost voltage.
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Accused Products
Abstract
A power factor correcting power supply includes an input stage power converter and an output stage power converter. The input stage power converter includes a plurality of series connected boost switches and a power factor correction controller. The power factor correction controller may direct the operation of the boost switches with series interleave phasing to perform power factor correction and voltage regulation. The boost switches are supplied input voltage and input current from a power source. The input voltage is converted to a DC boost voltage by high frequency series interleaved switching of the boost switches. The DC boost voltage is converted to a DC output voltage by the output stage power converter. The DC output voltage is provided on a DC rail for a load of the power factor correcting power supply.
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Citations
60 Claims
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1. A power factor correcting power supply comprising:
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a first boost converter that includes a first boost sub-circuit coupled with a second boost sub-circuit; a second boost converter coupled in series with the first boost converter, where the second boost converter includes a third boost sub-circuit coupled with a fourth boost sub-circuit, and the first and second boost converters are configured to receive an input voltage and supply a boost voltage that is greater in magnitude than a peak magnitude of the input voltage, where the boost voltage is divided by a factor of at least four with the first, second, third, fourth sub-circuits; and a power factor correction controller coupled with the first and second boost converters, where the power factor correction controller is configured to control the first and second boost converters with pulse width modulation and series interleave operation with the factor of at least four as a function of the boost voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A power factor correcting power supply comprising:
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an input stage power converter that includes at least four boost switches coupled in series, the at least four boost switches configured to be coupled in parallel with an input voltage; and a power factor correction controller coupled with the at least four boost switches, the power factor correction controller configured to direct the at least four boost switches independently with series interleave operation of a factor of at least four to provide a DC boost voltage from the input voltage, where the power factor correction controller is configured with feedforward control to direct the at least four boost switches as a function of the DC boost voltage. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A power factor correcting power supply comprising:
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an input stage power converter that includes a power factor correction controller and a first boost converter coupled in series with a second boost converter, where the first and second boost converters are controlled with interleave by the power factor correction controller to supply a DC boost voltage and to control a wave shape of an AC input current supplyable to the power factor correcting power supply by a power source; and an output stage power converter coupled with the first and second boost converters, where the output stage power converter is configured to balance the boost voltage supplied with the first and second boost converters. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A power factor correcting power supply comprising:
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an input stage power converter that includes a first pair of boost switches coupled in series and a second pair of boost switches coupled in series, where the first and the second pair of boost switches are coupled in series; means for controlling power factor coupled with the first and the second pair of boost switches, the means for controlling power factor configured to control each of the first and the second pair of boost switches with interleave to provide a portion of a DC boost voltage; and an output stage power converter coupled with the input stage power converter, where the output stage power converter includes a first output converter coupled with the first pair of boost switches and a second output converter coupled with the second pair of boost switches, where the output stage power converter is configured to substantially balance the portion of the DC boost voltage provided by each of the first and the second pair of boost switches. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A power factor correcting power supply comprising:
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a first boost switch and a second boost switch, the first and second boost switches coupled in series and configured to be coupled in parallel with an AC power source; a first boost sub-switch coupled in series with the first boost switch; a second boost sub-switch coupled in series with the second boost switch; a boost capacitor coupled across at least one of the first boost switch coupled in series with the first boost sub-switch and the second boost switch coupled in series with the second boost sub-switch; and a power factor correction controller coupled with the first and second boost switches and the first and second boost sub-switches, where the first and second boost switches and the first and second boost sub-switches are switchable with pulse width modulation to develop at least a portion of a DC boost voltage on the boost capacitor from an unrectified AC input voltage supplyable from the AC power source, wherein the DC boost voltage is greater in magnitude than a peak magnitude of the AC input voltage. - View Dependent Claims (45, 46, 47, 48, 49, 50)
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51. A method of performing power factor correction with a power factor correcting power supply, the method comprising:
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providing a power source having an input voltage and an input current; interleave switching at least four boost switches that are coupled in series across the power source to convert the input voltage to a first DC voltage; converting the first DC voltage to a second DC voltage with an output stage power converter; switching a switch mode converter included in the output stage power converter with a predetermined duty cycle to substantially balance conversion of the input voltage to the first DC voltage among the at least four boost switches; and supplying the second DC voltage to a power rail to supply a load. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification