H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/282 (2006.01) H05B 41/28 (2006.01) H02M 1/00 (2006.01) H02M 7/5383 (2006.01)
Patent
CA 2058653
PHA 21.650 14-10-1991 Abstract of the Disclosure A rectifier bridge includes two pairs of diodes , each pair connected to opposing ends of the secondary winding of a boost transformer whose primary winding is in series with the secondary winding of a high frequency DC/AC inverter circuit output transformer which is connected to ballasting capacitors in a fluorescent lamp receiving circuit. The bridge output charges a smoothing DC supply capacitor whose voltage is boosted by a pair of capacitors charged by the boost transformer whose inductance determines that the zero portion of the incoming line current waveform is boosted. The line voltage peaks are uncorrected. In a second embodiment both the peak region and the zero crossing region of the incoming line current waveform are corrected by deriving a portion of the boost voltage from the load circuit and a portion from the inverter circuit.
Nostwick Allan Albert
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Koninklijke Philips Electronics N.v.
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