Industry White Papers

Inverter Output AC Filter Capacitor for Today’s Demanding Applications

December 07, 2015 by Richardson RFPD

Many of today's inverter circuits require highly reliable and rugged capacitors to filter-out the rich harmonic content of their AC output waveforms. The current of the harmonics at the output of inverter circuits is often greater than the current at the fundamental frequency. Consequently, the harmonics can cause a significant increase in capacitor power dissipation. This condition affects both three-phase circuits, as illustrated in this Cornell Dubilier white paper, and single phase circuits. The harmonic currents are somewhat insignificant individually, however, in sum, they can become substantial. (registration required)

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