| 摘要 |
PURPOSE:To prevent the abnormal oscillation of an inverter by limiting the capacity value of a capacitor connected in parallel with the output of a rectifier of a base drive winding to the specific range. CONSTITUTION:The capacity value C of a capacitor 15 is set as follows to the value which is not excessively smoothed in the power source frequency components so that the high frequency components are sufficiently smoothed so as not to displace the synchronization between the both terminal voltages of transistors 7, 8 and the voltages between the bases and the emitters and not to overdrive the valley points of the pulsated power source voltage. 80/(f1R)<=C<=0.25/(f2R) (where f1 is the switching frequency of the transistor, f2 is the AC power source fequency, and R is the resistance value of the entire discharging load of the capacitor). When the capacity value of the capacitor 15 is specified in this manner, efficient inverter can be obtained without causing an abnormal vibration. |
