High power factor conversion circuitry
Patent 4109307 Issued on August 22, 1978. Estimated Expiration Date: 
May 4, 1997. 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.
May 4, 1997. 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 ReferencesHigh frequency power source for fluorescent lamps and the like Power source for fluorescent lamps and the like Tuned oscillator ballast circuit Patent #: 4045711 InventorAssigneeApplicationNo. 05/793875 filed on 05/04/1977US Classes:363/101, With auxiliary bucking or boosting EMF315/205, Plural discharge devices and/or rectifiers in the supply circuit315/220, Plural transformers in the supply circuit315/223, Condenser or inductance in the primary circuit315/224, Impedance or current regulator in the supply circuit315/247, With power factor control device331/113ASaturable core controlled convertersExaminersPrimary: Smith, Alfred E.Assistant: Roberts, Charles F. Attorney, Agent or FirmInternational ClassesH02M 7/538 (20060101)H02M 5/00 (20060101) H02M 1/00 (20060101) H05B 41/28 (20060101) H02M 5/458 (20060101) AbstractA high power factor conversion circuit suitable as a ballast circuit for lamps includes a full-wave rectifier coupled to an AC potential source and providing a pulsating DC potential. A high frequency inverter is coupled to a load circuit and to a feedback rectifier circuit supplying a rectified high frequency potential to an energy storage feedback circuit which provides energy in a manner to inhibit a decline in the pulsating DC potential thereby providing a substantially uniform DC potential to the high frequency inverter.Field of SearchCondenser or inductance in the primary circuitImpedance or current regulator in the supply circuit Periodic switch in the primary circuit of the supply transformer With power factor control device Plural discharge devices and/or rectifiers in the supply circuit Plural transformers in the supply circuit | |
