When it just needs to be kept simple: SEW Eurodrive MOVI4R‑U® The basic inverter is the ideal product for basic applications in drive technology. Our MOVI4R-U® frequency inverters provide the precise functionality that you need to reliably control the speed of asynchronous motors. Not less - but with considerable added value! The modular design of the MOVI4R-U® basic inverter, for example, is ideal for quick unit replacement. And the intuitive MOVI4R-U® operating concept enables impressively short startup times.