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Method for starting a high-pressure discharge lamp

A high-pressure discharge lamp and igniter technology, which is applied in the use of gas discharge lamps, electric light sources, electrical components, etc., can solve the problem that the ignition of high-pressure discharge lamps is not optimal.

Inactive Publication Date: 2013-05-22
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the resulting ignition pulse shape is not optimal for igniting high-pressure discharge lamps

Method used

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  • Method for starting a high-pressure discharge lamp
  • Method for starting a high-pressure discharge lamp
  • Method for starting a high-pressure discharge lamp

Examples

Experimental program
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Embodiment Construction

[0037] figure 1 A circuit arrangement known per se for operating a high-pressure discharge lamp is shown, said circuit arrangement having a half-bridge with series-connected half-bridge switches S2 and S3, at the center point of which a lamp choke is connected The series circuit of coil L3, secondary coil L2 of transformer TR and high-pressure discharge lamp 5 is ignited. The free end of the high-pressure discharge lamp 5 is connected to the connection point of the series circuit of two coupling capacitors C1 and C2. The half-bridge is connected in parallel with a series circuit of coupling capacitors. A supply voltage U_B (425 V in this exemplary embodiment) is applied to the parallel circuit. The ignition capacitor C3 and the ignition switch S1 are connected in series with the freewheeling diode D2 connected in parallel to the primary coil L1, which forms a primary circuit. The anode of the freewheeling diode and one terminal of the ignition capacitor C3 are connected to ...

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Abstract

The invention relates to a method for starting a high-pressure discharge lamp by means of a starter having a starting capacitor, a starting switch and a starting transformer, said method comprising the following temporally successive steps: - charging the starting capacitor to a predetermined voltage, - closing the starting switch, - opening the starting switch before the current through the starting switch, in terms of the fundamental of said current, reaches zero for the first time. The starting switch is actively switched off in the process under current, which results in a high starting voltage.

Description

technical field [0001] The invention relates to a method for igniting a high-pressure discharge lamp by means of a igniter. Background technique [0002] The invention is based on a method for igniting a high-pressure discharge lamp by means of an igniter with an ignition transformer according to the independent claims. [0003] Such an igniter and an ignition method are known from DE19909529A1. The known igniter has an ignition transformer, an ignition capacitor and a spark gap as an ignition switch. The primary coil is in series with the ignition capacitor and with the spark gap. The secondary coil is connected into the current path of the high-pressure discharge lamp to be ignited. A charging voltage is applied in parallel with the ignition capacitor. If the charging voltage exceeds the switching voltage of the spark gap, the spark gap is switched on and a brief, high current pulse occurs in the primary winding of the ignition transformer, which is step-up converted a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/288
CPCH05B41/2881H05B41/04Y02B20/204Y02B20/00H05B41/18H05B41/24H05B41/288
Inventor 约阿希姆·米尔施勒格尔
Owner OSRAM GMBH
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