| 摘要 |
PURPOSE:To reduce leaking mag. field by connecting a smoothing capacitor, resonator capacitor, and switching element so that the current paths forms a closed loop, allowing the current paths to intersect, and forming a plurality of closed loops. CONSTITUTION:A heater coil 10 is connected parallelly with a resonator capacitor 6, which is connected with a smoothing capacitor 5 producing a mag. field with high frequency and high mag. flux density through a current path 11, while this resonator capacitor 6 is also connected with a switching element 7 through another current path 12. The switching element and smoothing capacitor 5 are connected through a current path 13, and the current paths 12, 13 are intersecting, and a high frequency current closed loop 14 consisting of these three paths 11, 12, 13 forms two closed loops 14a, 14b having substantially equal area. Therefore, the magnetic fluxes produced by the two closed loops 14a, 14b cancel each other. Thereby leaking mag. field from a high frequency power converting device is reduced without requiring lessening of the opening area of closed loop. |
