| 摘要 |
PURPOSE:To prevent the damage of a transistor by surge voltage positively by absorbing the voltage of the primary winding of an inverter transformer by a DC power supply when the voltage rises by surge voltage. CONSTITUTION:The center taps of the primary winding NP1, NP2 of the inverter transformer T are connected to the plus terminal of the DC power supply E through a choke CH. A series circuit of a capacitor C1 and a diode D1 is connected in parallel with the choke CH. Secondary winding a2 is set up to the choke CH, and the one end is connected to the minus side of the DC power supply E while the other end is connected between the diode D1 and the capacitor C1. When surge voltage is applied, the diode D1 is turned ON, and surge voltage is absorbed to the DC power supply E. |
