Buck converter switching scheme

Details Buck converter switching scheme Buck converter switching scheme

1996-10-03

1999-11-30

Kinkead, Arnold

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315DIG5, 315291, 315 82, H05B 4136

Patent

active

059948469

ABSTRACT:
An arrangement for igniting and operating a high intensity discharge lamp including a Buck converter. The Buck converter includes a switch, a rectifier and an inductor. The converter is connected to input terminals for connection to a supply source and output terminals for supplying the lamp with a current through periodic swithing of the switch alternately into a conducting and a non-conducting state. The Buck converter operates in a self-oscillatory mode during stable lamp opertion. The arrangement further includes circuitry for causing the Buck converter to operate in a forced oscillatory mode in dependence on the lamp condition.

REFERENCES:
patent: 4412154 (1983-10-01), Klein
patent: 5036254 (1991-07-01), Shimizu
patent: 5068572 (1991-11-01), Blankers
patent: 5170333 (1992-12-01), Niwayama
patent: 5319286 (1994-06-01), Leyten
patent: 5420777 (1995-05-01), Muto

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