发明名称 |
DC/AC converter for a discharge lamp having a DC offset at the switching element to reduce power loss |
摘要 |
A circuit arrangement including a DC/AC converter for operating a discharge lamp. The DC/AC converter includes input terminals for connection of the DC/AC converter to a DC voltage source, and a switching circuit connected to the input terminals and provided with at least one switching element. The switching element has a control electrode and a main electrode and a control circuit between the main electrode and the control electrode for generating a control signal for the switching element. The switching element is conductive when a voltage is present between the control electrode and the main electrode with a first polarity having a value which exceeds a threshold value. A load branch includes at least inductive means and output terminals for connection of the discharge lamp, which load branch is supplied via the switching circuit. The control circuit also generates a DC voltage component between the control electrode and the main electrode with a polarity which is opposed to the first polarity. The switching element has fast switching capability including short duty cycles.
|
申请公布号 |
US5982108(A) |
申请公布日期 |
1999.11.09 |
申请号 |
US19970882445 |
申请日期 |
1997.06.25 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
BUIJ, ARNOLD W.;JACOBS, RONNY A. A. M. |
分类号 |
H05B41/24;H05B41/28;H05B41/282;H05B41/292;(IPC1-7):H05B37/02 |
主分类号 |
H05B41/24 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|