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Sample Problems for Rectifiers and Filters: Example #1: A 5:1 transformer i connected to a half-wave rectifier circuit with a 50kΩ load. Find (a) Vp; (b)Ip; (c) Idc; (d) Iac. I put voltage is 220Vpk.
Example #2: Assuming the diod in the circuit is ideal, sketch Vin, VD, ID, VL and IL for the halfwave rectifier using the 6.8kΩ a the load.
Example#3: Calculate the peak urrent and show the output waveform for a full-wave centertapped rectifier with an input voltage of 10Vpk and a load of 1kΩ. The internal esistance of the diode is 20Ω. Use Vf = 0.7V. Transformer turns ratio is 4:1.
Example#4: A bridge-type rectifier with an input voltage of 220Vac and a transf rmer turns ratio of 5:1 is terminated with a load L=1kΩ. Sketch the output voltage and current across the load.
Example#5: Draw the output voltage of the bridge rectifier shown. Notice that all diodes are reversed from previous circuits.
Example#6: Design a full-wave bridge type rectifier circuit with an input voltag of 120Vac and a transformer turns ratio of 1:2. T e circuit must have a Pac=4.8W across the load.
substitute (1) to (2): 4.8=0.5(339.46)Ip Ip=28.28mA therefore, R=12kΩ Example #7: Determine the ripple factor of the circuit.
Example #8: Compute for the ri ple voltage.
Example #9:A full-wave center-tapped circuit is used to rectify a sinusoid of 12 Vrms at 60Hz. If the minimum output voltage ca not drop below 100V and the load resistance is 5kΩ, what size capacitor is needed across RL? T e transformer turns ratio is 1:2.
