| 摘要 |
PURPOSE:To suppress the fluctuations of the power voltage of the control circuit of an inverter device of rectangular output, constituted so as to obtain power voltage for the control circuit by feeding load current back. CONSTITUTION:An inverter device which has switching devices Q1-Q4, a load Z, a capacitor C0, and an inductor L1 and supplies low-frequency rectangular wave power to the load Z has diodes D21 and D22 which half-wave-rectify the output voltages of the secondary windings N21 and N22 of the inductor L1, and a circuit of capacitors C21 and C22 for smoothing individual hald-wave rectified outputs connected in series to add those voltages is connected to the power input of a control circuit S. By doing this way, the DC voltage Vc21 of the capacitors C21 and C22 compensate for each other, and the fluctuations of the added voltage Vc2=Vc21+Vc22 lower. Consequently, the fluctuations of the power voltage of the control circuit S are suppressed as a whole. |
