on CONTROL & AUTOMATION, FOAM & MATTRESS INDUSTRY, Machines Repairing, VARIABLE FREQUENCY DRIVEST-verter N2 series is a high performance general-purpose inverter that incorporates a high efficiency Pulse Width Modulated (PWM) design and advanced IGBT technology. The output closely approximates a sinusoidal current waveform to allow variable speed control of any conventional squirrel cage induction motor.