Analytical Expression for RMS DC Link Capacitor Current in a Three-Level Inverter

  title={Analytical Expression for RMS DC Link Capacitor Current in a Three-Level Inverter},
  author={Kasthurirangan Gopalakrishnan and Soumitra Das},
An analytical expression is derived for calculating the rms current through the DC link capacitor in a three level inverter. The output current of the inverter is assumed to sinusoidal. Variations in the capacitor rms current with modulation index as well as line side power factor are studied. The worst case current stress on the capacitor is de termined. This is required for sizing the capacitor and is use ful for predicting the capacitor losses and life. The analy tical expression derived is… CONTINUE READING

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