Schaffner Introduces Sine Wave Filters for VFD Motor Drives

sine wave filtersThe new lineup of Sine Wave filters from Schaffner EMC eliminate premature motor damage caused by high dv/dt, overvoltages, cable ringing, motor overheating and eddy current losses caused by Variable Frequency Drives (VFD). Suitable for motor frequencies up to 600Hz, this proven technology converts the rectangular PWM output voltage of motor drives into a smooth sine wave with low residual ripple. In addition to elongating service life of expensive high speed motors, Schaffner Sine Wave filters can improve bearing life by eliminating circulating bearing currents. Typical applications include high-speed spindles, textile machinery, lasers, military appliances (400Hz), HVAC applications, pumps, ventilators, conveyors, compressors, elevators, cranes, step-up transformers, motor drives with multiple motors, and motor drives with long motor cables.

A full product line is available to accommodate a wide range of switching kHZ, and voltage ratings up to 690vac. Motor frequency can manage typically 60hz equipment and higher speed 600hz, with application engineered design for even higher frequencies. Model FN5020 and FN5040 Sine Wave filters are offered as open and enclosed.

Available for motors up to 200 HP (UL508C) over 200 HP to 800 HP (UL pending). Schaffner Sine Wave filters are easily installed and provide immediate results.

Schaffner EMC, with US operations headquartered in Edison, NJ, is part of The Schaffner Group – a worldwide leader in the fields of electro-magnetic compatibility (EMC), power quality (PQ) and engineered transformers. From a global innovation and development center in Luterbach, Switzerland, the company develops leading edge products which are manufactured in facilities worldwide. Their PQ product line includes active and passive harmonic filters, along with sine wave filters, which allow the efficient and reliable operation of electrical and electronic equipment and systems.

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