| 摘要 |
PURPOSE:To narrow the varying range of an operating frequency for a variation in a load current by connecting in series a parallel resonator with the AC side terminal of a rectifier. CONSTITUTION:Semiconductor switches 11, 18 are complementarily turned ON and OFF to flow a DC resonance current i1 from DC power sources 12, 19 through a rectifier 13 to a load 14. In this case, a parallel resonator 23 is formed of an inductor 24 and a capacitor 23, and connected in series with a series resonator 26 of a capacitor 16 and an inductor 17. The resonance frequency fs of the resonator 23 is set to a lower value than the resonance frequency f0 of the resonator 26 as the lowest operating frequency of a converter. Thus, when the operating frequency approaches the frequency fs, the impedance of the resonator 23 abruptly increases. Accordingly, the current i1 is abruptly decreased to control an output voltage. |
