| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion device for electrodeless discharge lamp which is simplified in component structure and made small size and in which the loss of component of the matching circuit is reduced and the Q value is increased, while the induction coil current is made to achieve necessary value even after passage of time. SOLUTION: By adopting a piezoelectric transducer in the matching circuit, component structure is simplified and the size is made small. The loss of the piezoelectric transducer is small even at a high frequency of more than several hundreds KHz (kilo Hertz), and the Q value is high, thereby a high efficiency and high performance of the power conversion device for electrodeless discharge lamp is obtained. Further, by controlling the induction coil current by changing the driving frequency of a main switch, it can flow a sufficient induction coil current IL, even if there have been variations and changes by the passage of time for its component elements. |
