An apparatus and method for reducing distortion currents present in an alternating current power system supplying power to a load which includes a passive filter and an active filter. In a first embodiment, the passive filter is operably connected to the power system across the load by a switching device....http://www.google.fr/patents/US5548165?utm_source=gb-gplus-shareBrevet US5548165 - Hybrid filter for reducing distortion in a power system
Hybrid filter for reducing distortion in a power system
