February 6, 2008 - PREMO EMC sinus filters are specially designed for installations with frequency inverters which need completely sinusoidal output signals and where pulse-width modulation (PWM) is not suitable.FS Sinus series prepares output wave and completely reduces dV/dT generated by IGBTs at inverter’s output that may damage motor winding and shorten useful life. They allow using long cable lengths between motor and inverter.Utilization of this type of filters has following advantages: Reduction of dV/dT and over voltages that motor receives, winding protection, increases motor useful life, lower inverter’s conducted disturbances, reduction of Eddy currents that damages bearings, and reduction of motor audible noise.Sinus filters are composed of two three-phase series FS4 and FS6.
FS4 series is indicated for rated voltage up to 400 Vac and FS6 series is indicated for rated voltage up to 690 Vac. The range of current is from 2.5 up to 610 Amps.Both families are designed for applications with motor frequencies up to 50 Hz and carrier frequencies between 4 and 16 kHz.
There is also the possibility of custom made design for higher motor frequencies.The connection is done by safety terminal blocks up to 150 Amps model and by copper busbar for higher currents.
