| 摘要 |
<p>The invention relates to an electronic transformer for operating at least one low-volt halogen lamp (L). The inventive transformer contains an inverse rectifier (3) having two switches (V1, V2) that can be switched-on and off for providing an alternating output voltage. Said transformer also comprises a control circuit (uC) for controlling the switching-on and switching-off behaviour of the two switches (V1, V2) pertaining to the inverse rectifier. Said electronic transformer further comprises a transformer (4, Tp, Ts1, Ts2) which is connected to the inverse rectifier (3) on the input side. A load circuit that is provided with the at least one low-voltage halogen lamp (L) is connected to the output side of said transformer (4, Tp, Ts1, Ts2). The aim of the invention is to dim the low-volt halogen lamp (L). The pulse duty factor for the two switches (V1, V2) is changed by means of the dead time (ttot) remaining constant between the opening of one of the two switches (V1) and subsequently closing the remaining switch (V2) and by reducing the make-time (tein) respectively. Silent dimming is thus made possible.</p> |
