| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller which is excellent in capacity reduction of voltage rating of an active filter in resonance control of a DC circuit and the responsiveness and stability of the control system. SOLUTION: The DC main circuit of a converter inverter system is composed of a rectifier 2, a capacitor 5 on output side of the rectifier, inductances 7 and 8, resistors 9 and 10, a capacitor 6 on input side of an inverter, an inverter 3, and load 4. At this time, this controller is equipped with active filters 15 and 16, in series with the capacitor 5 on output side, and this is further provided with a current detector 12 which detects the current for AC flowing in the capacitor 5 on output side, a setter 11 which sets a specified proportional constant K, and a multiplier 13 which multiplies the proportional constant K set by the setter 11 by the value detected by the current detector 12. The output of the multiplier 13 is made the voltage command values of the active filters 15 and 16. |
