| 摘要 |
<p>An electronic mains connection device for a gas-discharge lamp, acting as a stabilizing current limiting element and comprising an inverter circuit which from rectified mains current or from some other direct current converts the service voltage for a lamp to such a high frequency that the impedance of a discharge lamp is like normal resistance. A problem is to provice a stable current limitation without current limiting impedances, whereby the limitation of a current can be arranged to be effected only by means of the lamp's own resistance-like impedance on both half-cycles. For this end, the limitation of a current is effected during a period longer than a cycle of inverter operation by means of a feed-back control (7, 8) of the lamp current controlling the opening times and/or operating frequency of the switches (3, 5) of said inverter circuit.</p> |
