| 摘要 |
Two fluorescent lamps are lightened by a single inverter circuit which provides switched power current to a single leakage transformer. The leakage transformer has a single primary winding coupled with said inverter circuit and a pair of secondary windings each coupled with a related fluorescent lamp. The core of said leakage transformer has a closed magnetic core with a pair of short legs each of which bridges across said closed magnetic path with a non-magnetic material so that said pair of short legs provides three windows and bypass leakage magnetic paths. The first window is defined by said pair of short legs, and each of the second and the third legs is defined by one of said short legs and said closed magnetic path. The primary winding is mounted in said first window, and each of said pair of secondary windings is mounted in said second or third window. The magnetic flux in said closed magnetic path provides high output voltage, which fires a lamp, then, the magnetic flux is switched to the leakage path which includes said short leg and the non-magnetic material, then, the output voltage is reduced but is enough to maintain the discharge current in the lamp.
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