| 摘要 |
PURPOSE:To provide a compact and inexpensive inverter device where the secondary output voltage of a transformer can be controlled easily. CONSTITUTION:Switching elements S1 and S2 are turned on and off alternately by the drive signal from a control part CT to generate resonance voltage at both terminals of a capacitor C0. On the other hand, a switching element S0 is turned on for a certain amount of time when the resonance voltage applied to the capacitor C0 nearly reaches 0 by the drive signal from the control part CT. Primary side inductance components L1 and L2 of the transformer T are canceled out while the switching element S0 is on and an energy corresponding to the ON period of the switching element S0 is accumulate, as a magnetic energy, in an inductance LS from a DC power supply. The energy accumulated in the inductance LS becomes a resonance energy when the switching element S0 is turned off, thus increasing the maximum value and RMS of the resonance voltage. |
