| 摘要 |
<p>The invention relates to a ballast with common core meant for duo connections with fluorescent lamps which may be supplied from alternating current systems, in the lighting field. According to the invention, the ballast uses a magnetic circuit (1) with three columns, on each column of the magnetic circuit (1) there are placed the windings (2, 2' and 3) which are connected to a common connection point (4), in order to eliminate the high consumption of iron and copper, the losses by Joule-Lentz effect and to reduce the mass of the lighting body.</p> |
