Current stress has an important impact on the lifetime of the capacitors. This applet is a current stress calculator for the DC side capacitors of a 3-phase DC-AC inverter. The calculation is based on the analytical expressions as given in the upper left corner of the applet. The applet also demonstrates the dependency of the capacitor current stress on the modulation index and the phase shift between voltage and current.

• Drag the red points on the voltage and current curves to change the modulation index and the phase shift between voltage and current.
• Click on the red text labels to open a dialog window to set parameter values. Press 'OK' in the dialog window to change a value. The calculation will be performed immediately and the numerical result for the rms-current in the DC capacitor will be shown in blue.