| 摘要 |
PURPOSE:To easily detect a defective converter of the converters connected in parallel, by additionally providing a circuit of construction comparatively simplified. CONSTITUTION:A generator NWP, for generating a pulse of narrow width not setting to zero the conduction width of inverter element within a prescrived period of error voltage detection to the output voltage, and a low voltage detecting circuit LVA-2, for detecting the fact that the output voltage of a high frequency transformer comes to be lower than a prescribed value, are additionally provided in the conventional circuit, including an AC-DC converter DET, inverter IVT, high frequency transformer HFT, deviation detecting circuit EDT and post-amplification voltage-time conversion circuit VTC. In such construction, to make obtainable the detection voltage of low voltage detecting circuit LVA when the inverter IVT is operated by a pulse of narrow width, when any fai-ure is found in the element of generator, voltage - time conversion circuit and inverter, can detect the defective converter, only with a low voltage detecting alarm circuit LVA-2 in the converter operated. |
