Lab1. Rectifiers and Linear Power Supplies
1. Open Program: Start => Programs => DesignLab Eval 8 => Schematics.
2. Select and put proper part and arrange them in the following circuit:
3. Set the attributes of GENERATOR (VSIN): Amplitude=15 (V), frequency=50 (Hz)
4. Click ANALYSIS SETUP Icon and select BIAS POINT DETAILS
5. Start simulation (F11). Compare the simulated values with expected.
For all the circuits DO:
6. For transient analysis click ANALYSIS SETUP Icon select and click TRANSIENTS..
7. Set Print Step =100 us and Final Time 100 ms
8. Place Voltage Differential Markers onto secondary coil of Vsin.
9. Start simulation (F11).
10. Sketch the waveforms and find maximal- Vmax, average-Vav and ripple -Vr voltages
11. Investigate the effect of Load (R1=100Ω) value on Vav and Vr. Compare with theoretical value
12. Investigate the effect of C1 (100 uF) value on Vav and Vr. Compare with theoretical value
Half-wave rectifier
Sketch waveform , repeat steps 12-13 and place the results (C=0) in the table below
Half-wave rectifier with smoothing filter
Connect capacitor 470 µF parallel to load as a smoothing filter.
Sketch waveform, repeat steps 12-13 and place the results in the table below
R1
C1
Vmax
Vr
Vav
Vr (calculated)
470 Ω
0 (no filter)
470 Ω
470 µF
100 Ω
470 µF
470 Ω
100 µF
1
Central tapped Full-wave rectifier without and with smoothing filter (C1)
Sketch waveform , repeat steps 12-13 and place the results (C=0) in the table below
Connect capacitor 470 µF parallel to load as a smoothing filter.
Sketch waveform, repeat steps 12-13 and place the results in the table below
R1
C1
Vmax
Vr
Vav
Vr (calculated)
470 Ω
0 (no filter)
470 Ω
470 µF
100 Ω
470 µF
470 Ω
100 µF
Full-wave Bridge rectifier without and with smoothing filter (C1)
Sketch waveform , repeat steps 12-13 and place the results (C=0) in the table below
Connect capacitor 470 µF parallel to load as a smoothing filter.
Sketch waveform , repeat steps 12-13 and place the results in the table below
R1
470 Ω
470 Ω
100 Ω
470 Ω
C1
0 (no filter) 470 µF
470 µF
100 µF
Vmax
Vr
Vav
Vr (calculated)
2
Full-wave Bridge rectifier with Zener Diode
Simulate, repeat steps 12-13 and place the results (C=0) in the table below
Connect capacitor 100 µF parallel to load as a smoothing filter.
Simulate, repeat steps 12-13 and place the results in the table below
R1
470 Ω
470 Ω
100 Ω
470 Ω
C1
0 (no filter) 100 µF
100 µF
470 µF
Vmax
Vr
Vav
Unregulated Power Supply with Emitter Follower
Simulate, repeat steps 12-13 and place the results in the table below
Simulate, repeat steps 12-13 and place the results in the table below
R1
470 Ω
470 Ω
100 Ω
470 Ω
C1
0 (no filter) 100 µF
100 µF
470 µF
Vmax
Vr
Vav
Compare the effect of load and filter with previous circuit
3
Regulated Power Supply with OpAmp feedback
Simulate, repeat steps 12-13 and place the results in the table below
Simulate, repeat steps 12-13 and place the results in the table below
R1
470 Ω
100 Ω
470 Ω
C1
100 µF
100 µF
470 µF
Vmax
Vr
Vav
Compare the effect of load and filter with previous circuit
Regulated Power Supply with Current Limit
Simulate, repeat steps 12-13 and place the results in the table below
Vary the values of R1 and R5, simulate, repeat steps 12-13 and place the results in the table below
R1
100
10
2
1
1
1
R5
1
1
1
1
2
0
Vmax
I max
Comment Current limiting effect
4