(Solved): A H-bridge converter employing four BJT devices and four freewheeling diodes is connected to a dc ...

A H-bridge converter employing four BJT devices and four freewheeling diodes is connected to a dc source of 200 V and operates at 5 kHz. The load can be modelled as an ideal current source of 7 A. The duty cycle of switch S1 is 46 %. The circuit schematic and devices parameters are shown below. Calculate the combined losses (in watts) of BJT S1 and diode DS1. 200V S1 DS1 S3 DS3 S2, S4 Devices parameters are: BJT Imax = 25 A Vmax = 300 V VCE (sat) = 0.7 V ton = 100 ns toff = 200 ns DS2 OV 7A Diodes Vfwd = 0.25 V Imax = 25 A Vmax = 300 V Rf=5 m2 DS4