BigPatents India

The invention relates to A snubberless inverter comprising a plurality of IGBTs (3) mounted on a heat sink (1), the ac terminals of the IGBTs being connected to busbars (4) projecting onwards through slots in a fibre-glass sheet (5), the positive terminals of the IGBTs being connected to positive busbar (8a), the negative terminals of the IGBTs being connected to negative busbar (7a), a plurality of capacitors (6) being fixed to the fibre-glass sheet (5), their positive terminals being connected to the positive busbar (8b), their negative terminals being connected to the negative busbar (7b), a discharge resistance (9) is connected between busbar 7b and 8b to effectively discharge the capacitors (6) wherever the dc power to the capacitors are switched off. (FIG.)nil