SineWave Guardian

The SineWave Guardian® Filter is MTE’s highest-performance solution for motor protection and power quality in VFD-driven systems. Designed to clean the PWM waveforms produced by variable frequency drives, this filter delivers a true sine-wave output to the motor—virtually eliminating high-frequency noise, voltage spikes, and harmful dv/dt stress.

Often referred to as a low-pass or band-reject filter, the SineWave Guardian removes carrier frequency energy that causes motor heating, insulation breakdown, and premature failure. By producing a smooth, motor-friendly waveform, it significantly extends motor life while reducing downtime and maintenance costs.

Built for demanding industrial environments, the SineWave Guardian offers exceptional efficiency, high-temperature tolerance, and rugged reliability. Its modular design and compact footprint make it easy to integrate into both new and retrofit applications—from steel mills and oil fields to any facility that requires the highest level of motor protection.