| 摘要 |
PURPOSE:To realize a starting means which needs a smaller number of components by a method wherein the starting means of a power converting circuit is composed of a first capacitance means, a second capacitance means and a negative resistance means. CONSTITUTION:A capacitor 3 which is a first capacitance means is charged by a DC power supply 2 and, when the charged voltage of the capacitor 3 exceeds a designated value, a DIAC 5 which is negative resistance means is turned off. By the negative resistance characteristics of the DIAC 5, a charging current is applied to a capacitor 4 which is a second capacitance means at one stroke. The charging current is applied to a power converting circuit composed of transistors 6 and 7, etc., as a starting signal. With this constitution, a starting signal receiving means for the power converting circuit can be realized with a small number of components. |
