Question 10.SP.12: Use SPICE methods to model the boost converter of Fig. 10-4 ......
Use SPICE methods to model the boost converter of Fig. 10-4 with f_s = 20 \text{kHz}, D = 0.25, L = 50 μH, C = 100 μF, and R_L = 7.5 Ω. From the model, generate a set of waveforms analogous to Fig. 10-5.
Step-by-Step
The netlist code is shown below where the initial conditions on inductor current and capacitor voltage were determined after running a large integer number of cycles to find the repetitive values.
| Prb10_12.CIR * BOOST CONVERTER * D=DUTY CYCLE, fs=SWITCHING FREQUENCY .PARAM D=0.25 fs=20e3Hz V1 1 0 DC 15V SW 2 0 4 0 VCS VSW 4 0 PULSE(0V 1V 0s 5ns 5ns {D/fs} {1/fs}) L 1 2 50uH IC=1.657A D 2 3 DMOD C 3 0 100uF IC=20.05V RL 3 0 7.5ohm .MODEL DMOD D(N=0.01) .MODEL VCS VSWITCH(RON=1e-6ohm) .TRAN 1us 0.25ms 0s 100ns UIC .PROBE .END |
Execute 〈Prb10_12.CIR〉 and use the Probe feature of PSpice to plot the waveforms shown in Fig. 10-13.
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