High powerfactor at ac input can be achieved by controlling the switch of capacitor charge circuit.
通过对电容器充电回路开关管进行控制，实现交流输入端的高功率因数。
2
It can obtain the improve of powerfactor of the input motor power, and can lighten its capacity.
可实现电机输入电源功率因数的改善，减轻其容量。
3
It is an important factor for the perfect matching between the maximal inputpower of the hydraulic oil pump and the maximum output power of the engine in the design process of the hydraulic shovel.