| 摘要 |
PURPOSE:To remove signals other than proper ones and, at the same time, to make phase control easily adjustable over a wide range (from an advancing phase to a delayed phase) by performing system stabilizing control in such a way that differentiation circuits are provided in two stages and a filter is installed to an active power auxiliary signal inputting section. CONSTITUTION:An excessive ripple component is removed from an active power auxiliary signal P by means of a filter 1. The signal from which the ripple component is removed is inputted to a first-stage differentiation circuit 2. The circuit 2 outputs a certain percentage of advanced-phase waveforms. The output of the circuit 2 is inputted to a second-stage phase advancing circuit 3 and a required advanced-phase waveform is finally outputted. Since the control of system stabilization is doubled, adjustment between an advanced phase and lagged phase can be made easily and, since it is not required to raise the gain, the ripple of an input can be controlled strongly. |
