Boost power converter for powering a load from an AC source
First Claim
1. A boost power converter for powering a load with an AC source, comprising:
- an AC to DC conversion circuit for generating a DC signal in response to the AC source;
a resonator, including first and second switching devices, an energy storage device and a resonant circuit, configured for alternately applying energy from the energy storage device to the resonant circuit for powering the load; and
a boost circuit including a choke for receiving the DC signal, a rectifier for electrically coupling the choke to the energy storage device, and a third switching device, coupled between the choke and a node between the first and second switching devices, for selectively coupling the choke to the resonant circuit.
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Accused Products
Abstract
A boost power converter for powering a load with an AC source is disclosed. The boost power converter comprises an AC to DC conversion circuit, a resonator, and a boost circuit. The resonator includes an energy storage device and a resonant circuit, and alternately applies energy from the energy storage device to the resonant circuit for powering the load. The AC to DC conversion circuit generates a DC signal in response to the AC source. The boost circuit includes a choke for receiving the DC signal, a rectifier for electrically coupling the choke to the energy storage device, and a switching device for selectively coupling the choke to the resonant circuit for charging and discharging the choke. The resonator operates in full resonant mode with zero voltage switching. The boost power converter is well-suited for ballast applications that drive a fluorescent lamp.
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Citations
32 Claims
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1. A boost power converter for powering a load with an AC source, comprising:
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an AC to DC conversion circuit for generating a DC signal in response to the AC source; a resonator, including first and second switching devices, an energy storage device and a resonant circuit, configured for alternately applying energy from the energy storage device to the resonant circuit for powering the load; and a boost circuit including a choke for receiving the DC signal, a rectifier for electrically coupling the choke to the energy storage device, and a third switching device, coupled between the choke and a node between the first and second switching devices, for selectively coupling the choke to the resonant circuit. - View Dependent Claims (2, 3, 4)
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5. A boost power converter for powering a load with an AC source, comprising:
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(a) an AC to DC conversion circuit; (b) a resonator for applying an alternating voltage to the load, the resonator including; (i) a resonant circuit including a coil and a capacitor; (ii) a first switching device and a second switching device, each electrically coupled to the resonant circuit and configured for zero voltage switching; and (iii) an energy storage device electrically coupled to the first switching device; (c) a choke electrically coupled to the AC to DC conversion circuit; and (d) a third switching device electrically coupled between the choke and a node between the first and second switching devices. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A boost power converter for powering a load with an AC source, comprising:
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an AC to DC conversion circuit; a choke; first and second rectifiers; a resonant circuit including a coil and a capacitor; first, second and third switching devices; a switch controller configured for operating the first and second switching devices at approximately a resonant frequency of the resonant circuit; a power factor correction controller configured for operating the third switching device; and an energy storage device configured for receiving energy from the AC source and for providing energy to the load; wherein first and second input terminals of the AC to DC conversion circuit are adapted to receive first and second output terminals of the AC source, a first output terminal of the AC to DC conversion circuit is electrically coupled to an input terminal of the first rectifier, an output terminal of the first rectifier is electrically coupled to a first end of the choke, a second end of the choke is electrically coupled to an input terminal of the second rectifier and to a first end of the third switching device, an output terminal of the second rectifier is electrically coupled to a first end of the first switching device and to a first end of the energy storage device, a second end of the third switching device is electrically coupled to a second end of the first switching device and to a first end of the second switching device and to a first end of the resonant circuit, a second end of the resonant circuit is adapted to receive a first end of the load, and a second end of the second switching device is electrically coupled to a second end of the energy storage device and to a second output terminal of the AC to DC conversion circuit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for powering a load with an AC signal, comprising:
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applying the AC signal to an AC to DC conversion circuit for generating a DC signal; applying the DC signal to a choke; selectively coupling the choke to a node between first and second switching devices of a resonant circuit; applying a boosted voltage from the choke to an energy storage device; and alternately applying energy from the energy storage device to the resonant circuit for powering the load. - View Dependent Claims (31, 32)
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Specification