H - Electricity
02
M
H02M 1/12 (2006.01) H02M 5/45 (2006.01) H02M 7/537 (2006.01) H05B 41/24 (2006.01) H05B 41/28 (2006.01) H05B 41/285 (2006.01) H02M 1/00 (2006.01)
Patent
CA 2132002
2132002 9416492 PCTABS00033 A power supply which incorporates a high frequency inverter and which is suitable for use in conjunction with a fluorescent lamp. The power supply comprises a full wave rectifier (10) and a reservoir capacitor (12) connected across the rectifier for the purpose of providing successive half-cycles of the voltage waveform V2 across the capacitor with a minimum instantaneous voltage level greater than zero. A solid state switching device (14) and an oscillator (15) are connected in circuit with the reservoir capacitor. The oscillator generates a gating signal V3 at a frequency significantly greater than that of the voltage waveform V2 across the reservoir capacitor and applies the gating signal to the switching device. The switching device is arranged to provide an output voltage V4 which has a frequency determined by the applied gating signal V3 and which has a peak amplitude value which varies over successive cycles with the waveform of the voltage V2 across the reservoir capacitor.
H.p.m. Industries Pty Limited
Robic
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