17-11-2012, 06:11 PM
SINGLE PHASE FULL WAVE RECTIFIER
SINGLE PHASE FULL WAVE RECTIFIER.docx (Size: 276.99 KB / Downloads: 58)
THEORY:
The circuit of a center-tapped full wave rectifier uses two diodes D1&D2. During
positive half cycle of secondary voltage (input voltage), the diode D1 is forward biased and
D2is reverse biased. The diode D1 conducts and current flows through load resistor RL.
During negative half cycle, diode D2 becomes forward biased and D1 reverse biased. Now,
D2 conducts and current flows through the load resistor RL in the same direction. There is a
continuous current flow through the load resistor RL, during both the half cycles and will get
unidirectional current as show in the model graph. The difference between full wave and half
wave rectification is that a full wave rectifier allows unidirectional (one way) current to the
load during the entire 360 degrees of the input signal and half-wave rectifier allows this only
during one half cycle (180 degree).
Procedure:
1. Connect the circuit as shown in circuit diagram without filter capacitor.
2. Measure the value of by removing the load(DRB).
3. Connect the load and measure for different values of load current by varying the resistance in DRB.
4. Connect the capacitor filter and repeat the above steps 2 and 3.
5. Using the formulae, calculate the values of ripple factor and voltage regulation.
6. Plot the graph showing variation of output voltage with load current for the Full Wave Rectifier with simple Capacitor filter.
7. Also observe and sketch the input wave form and output wave form of the full wave rectifier with and without filter using CRO