3-Phase SINE Wave Filters Assert Improved EMC Performance
Schurter expanded its output filter portfolio for EMC with the introduction of the 3-phase sine wave output filters, series FMAC SINE and FMAC SINE DCL. The new sine wave filters are designed to convert output voltage wave forms produced by PWM (pulse width modulation) frequency converters into low distortion sine wave forms for motor and power transformation applications resulting in significantly increased efficiency and life of the motor, according to the company. The filters are intended for use in 500 VAC installations and currents upwards of 4 A. The FMAC SINE and the FMAC SINE DCL operating voltage is 3 x 288/500 VAC and rated currents range from 4-16 A. Both have screw clamp terminals and screw on mounting to the chassis. They are designed for use in motors with power from 1.5 kW to 7.5 kW, frequency 0 Hz to 200 Hz and switching frequency of 2 k Hz to 20 kHz. The new sine wave filters allow the use of long, lightweight and cost effective unshielded motor cables. FMAC SINE is optimized for motor cables up to 200 m, and the FMAC SINE DCL includes a voltage DC link and accommodates motor cables up to 1000 m under full load. The sine wave filters are suited to a variety of applications including frequency converters in uninterruptible power supplies, elevators, HVAC systems, conveyor systems and medical equipment.