| 摘要 |
PURPOSE:To use a diode for a snubber of small capacity by providing an inductance on a discharge line for connecting the both ends of a capacitor for absorbing a surge and the both ends of a rectifying condenser of a main circuit. CONSTITUTION:Transistors T1a and T1b, T2a and T2b, T3a and T3b are sequentially displaced to be laternately turned ON or OFF to control an induction motor M. Inductances La, Lb are respectively provided at feedback lines la, lb, and a current flowed to a rectifying condenser C0 of a main circuit through the diodes D11-D3b and the discharge lines la, lb after a surge current is stopped by the inductances La, Lb. Accordingly, the currents flowed to the diodes D1a- D3a become only the surge current. |
