High frequency power source for fluorescent lamps and the like
Power source for fluorescent lamps and the like
Tuned oscillator ballast circuit Patent #: 4045711
ApplicationNo. 05/793875 filed on 05/04/1977
US 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 converters
ExaminersPrimary: Smith, Alfred E.
Assistant: Roberts, Charles F.
Attorney, Agent or Firm
International 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 circuit
Impedance 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