| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter circuit for discharge lamps with a high power transformer equivalent to a large transformer by separating transformers into a plurality of small or middle transformers and connecting them to one another. <P>SOLUTION: The inverter circuit includes a plurality of leakage flux step-up transformers each having a magnetically continuous central core, a primary winding, and a distributed-constant secondary winding, wherein a part of a resonance circuit is formed of a leakage inductance produced on the secondary winding side, a distributed capacitance of the secondary winding and a parasitic capacitance produced around a discharge lamp close to a proximity conductor, and as the resonance circuit resonates, the secondary winding has a close coupling portion in the vicinity of the primary winding which has a magnetic phase close to that of the primary winding and magnetically close couples with the primary winding and where a large portion of a magnetic flux produced under the primary winding penetrates the close coupling portion, and a loose coupling portion apart from the primary winding which has a magnetic phase delayed from that of the primary winding and magnetically loose couples with the primary winding and where a large portion of the magnetic flux produced under the primary winding leaks, whereby a plurality of discharge lamps are lighted in parallel. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
