Q1 A Power Device Operating At 5khz Switches A Constant Current Source Load Of 60a Across A Dc Supply Of 200v With A Dut 1 (70.33 KiB) Viewed 59 times
Q1 A Power Device Operating At 5khz Switches A Constant Current Source Load Of 60a Across A Dc Supply Of 200v With A Dut 2 (51.72 KiB) Viewed 59 times
Q1 A Power device operating at 5kHz switches a constant current source load of 60A across a dc supply of 200V with a duty cycle of 30%. Devices with characteristics given in Table Q1 are available for this application. The basic circuit diagram is shown in Fig Q1. a. b. Select suitable devices from Table Q1 and suggest any (20 Marks) modification needed to fit this application Calculate the converter efficiency and heat dissipation (20 Marks) requirement Provide driving circuit and considerations (10 Marks) I Total (50 Marks) C. = MOSFETS Rds(on) = 0.192 Vmax = 300V Imax = 20A ton = 200ns; toff = 300ns BJTS VCE(sat) = 0.85V Vmax = 300V Imax = 20A ton = 200ns; toff = 300ns Table Q1. Device Parameters Diodes Vfwd=0.3V Imax = 20A Vmax = 300V Rf= 10m 2 y
MOSFETS Rds(on) = 0.122 Vmax = 300V Imax = 20A ton = 200ns; toff= 300ns = BJTS VCE(sat) = 0.85V Vmax = 300V Imax = 20A ton 200ns; toff = 300ns Table Q1. Device Parameters Diodes Vfwd=0.3V Imax = 20A Vmax = 300V Rf= 10m 2 = Vdc 10 S1 OV Fig. Q1: Basic circuit
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