Method for varying voltage in a high intensity discharge...

Details Method for varying voltage in a high intensity discharge... Method for varying voltage in a high intensity discharge...

H - Electricity

05

B

315/41

H05B 41/36 (2006.01) H05B 41/39 (2006.01)

Patent

CA 1081310

A METHOD FOR VARYING VOLTAGE ABSTRACT OF THE DISCLOSURE A method for varying the voltage in a high intensity discharge mercury lamp comprising the following steps: (a) energizing the lamp at a substantially fixed current; (b) selecting a predetermined voltage; (c) sensing the lamp voltage; and (d) when the lamp voltage rises above the predetermined voltage, directing a pulsed flow of gas, which gas is at a temperature sufficient to condense the mercury, against the outer surface of the lamp intermediate of its electrodes at a pulse rate and pulse duration sufficient to achieve and maintain about the predetermined voltage.

310191

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