Module 5: DC-AC Converters

Lecture 14 : DC-AC Inverter for EV and HEV Applications



When diodes D1 and D2 conduct, energy is fed back to the dc source and these diodes are known as feedback diodes . These diodes are also known ad freewheeling diodes . The current for purely inductive load is given by

                                                                       (9)

Similarly, for the R-L load. The instantaneous load current is obtained as

                                                       (10)

The instantaneous voltage (vo) across R-L load and the instantaneous current (iL) through it are shown in Figure 7 .

Figure 4 : DC-AC inverter with inductive load

Figure 5 : Load current in case 1

Figure 6 : Load current in case 2

Figure 7 : Instantaneous output voltage and load current through R-L load