Power factor correction in switching power conversion
July 16, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References D328057 Forward converter switching at zero current Optimal resetting of the transformer's core in single ended forward converters Power booster switching at zero current Current-fed, forward converter switching at zero current Power supply having combined forward converter and flyback action for high efficiency conversion from low to high voltage Enhancement-mode zero-current switching converter Voltage-compliant DC-DC converter module Zero current switching forward power conversion apparatus and method with controllable energy transfer Adaptive boost switching preregulator and method InventorsApplicationNo. 116625 filed on 07/16/1998US Classes:363/21.02For resonant-type converterExaminersPrimary: Nguyen, MatthewAttorney, Agent or FirmInternational ClassH02M 003/335AbstractA power converter, for accepting power from a source and delivering power to a load, comprises conversion circuitry including a first side coupled to the source and a second side isolated from the first side and coupled to the load, energy storage circuitry, connected to the first side of the conversion circuitry, for storing energy at a voltage higher than the voltage of the source, and a switch arranged with respect to the conversion circuitry and energy storage circuitry to allow energy to be delivered from the source to the energy storage circuitry and a quantum of energy to be delivered to the second side of the conversion circuitry during a time that the switch is closed. Energy can be delivered to the energy storage circuitry and the quantum of energy delivered to the second side of the conversion circuitry during less than the entire time that the switch is closed. A method for use in converting power from a source to a load comprises closing a switch, receiving energy from the source during at least a portion of the time that the switch is closed for storage in a first circuit at a voltage higher than the voltage of the source, and transferring, during at least a portion of the time that the switch is closed, a quantum of energy stored in the first circuit to a second circuit that is coupled to the load and is isolated from the first circuit.Other References
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