Electric lamp and discharge devices: systems – Surge generator or inductance in the supply circuit
Patent
1989-09-19
1990-09-18
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Surge generator or inductance in the supply circuit
315290, 315244, 315DIG5, 315DIG2, H05B 4114, H05B 3702
Patent
active
049581074
ABSTRACT:
Apparatus for starting and operating a high pressure discharge lamp includes a pair of input terms for connection to a high frequency inverter. A step-up transformer couples the input terminals to a pair of output terminals for connection of the discharge lamp. A switching arrangement including a voltage-multiplier circuit, is coupled to the primary winding of the transformer and includes a first branch comprising a first capacitor and a diode and a second branch comprising a diode. Between the first capacitor and the diode of the first branch is connected a third branch comprising a semiconductor switch such as a SIDAC. The first branch is connected through the transformer coil to a first supply source connection point. The second branch is connected to a tap point of the coil. The first and the second branch are connected via a common impedance including second capacitor and an inductor to a second supply source connection point. The third branch is connected directly to both the coil and the diode of the second branch. The SIDAC periodically switches over from a cut-off state to a conductive state in response to a voltage developed across one or more capacitors of the voltage-mulitplier circuit thereby to rapidly discharge the capacitor voltage across the winding of the step-up transformer. A high voltage ingnition pulse is generated in the secondary of the step-up transformer and is applied to the output terminals to ignite a connected discharge lamp.
REFERENCES:
patent: 4209730 (1980-06-01), Pasik
patent: 4337417 (1982-06-01), Johnson
Mattas Charles B.
Szuba Stefan P.
Van Zanten Egbert
Franzblau Bernard
LaRoche Eugene R.
Neyzari Ali
North America Philips Corporation
LandOfFree
Switching arrangement for HID lamps does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switching arrangement for HID lamps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching arrangement for HID lamps will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1574024