a) Draw the circuit of a half-wave-rectifier and find the ripple factor, % regulation, efficiency and PIV.
b) Compare the performance of Inductor filter and capacitor filter.
problem 2: With appropriate diagrams, describe the working of centre-tapped full wave rectifier. Derive expressions for VDC, IDC, Vrms and Irms for it
a) Describe the working of Bridge rectifier with required sketches and parameters.
b) Describe the relative advantages and disadvantages of all the rectifiers.
a) Define the given terms of a rectifier and filter:
• Ripple Factor.
• Rectification Efficiency.
• Form Factor.
b) What is the ripple factor if a power supply of 220 V, 50 Hz is to be Full Wave rectified and filtered with a 220µF capacitor before delivering to a resistive load of 120Ω? find out the value of capacitor for the ripple factor to be less than 15%.
a) Derive expressions for ripple factor of a Full Wave Rectifier with and without a capacitive filter.
b) find out the average and RMS load currents, TUF of an unfiltered centre tapped Full Wave Rectifier specified below.
Input voltage to transformer = 220 V/50 Hz.
Step down ratio of centre tapped transformer = 4:1(Primary to each section secondary).
Sum of transformer secondary winding in each secondary segment and diode forward resistance = 100Ω.
Load resistance, RL = 220Ω.
a) Define the term Ripple factor and form factor. Establish a relation between them.
b) Describe the need of a bleeder resistor in an L – section filter used with a Full Wave filter.
c) find out ripple factor of an L – section choke input filter used at the output of a Full wave rectifier. Capacitor values of the filter are given as 10 H and 8.2 µF correspondingly
a) List out the advantages and disadvantages of Bridge type Full Wave rectifiers over centre tapped type Full Wave rectifiers.
b) The secondary voltages of a centre tapped transformer are given as 60V-0V-60V the total resistance of secondary coil and forward diode resistance of each section of transformer secondary is 62Ω. find out the following for a load resistance of 1 KΩ.
• Average load current
• Percentage load regulation
• Rectification efficiency
• Ripple factor for 240 V/50Hz supply to primary of transformer.
c) What is bleeder resistance in L – section filters?