Lab Report

Aim:

To design and simulate a Full Wave Rectifier circuit.

Components required:

   Function generator, CRO, Regulated Power supply, resistor, diode, connecting wires.

Vlab Specifications Taken:

Full wave circuit design has been implemented on the virtual breadboard using following specifications:

• Power Supply: +10v and -10v
• Function generator: Selected wave with following specifications:

Frequency = 1KHz.
Amplitude: 5V
Duty cycle = 50%

• Resistor R₁: 10.36K

Theory:

The conversion of AC into DC is called Rectification. Electronic devices can convert AC power into DC power with high efficiency. A drawing of a full-wave bridge rectifier is given below. The bridge is composed of four diodes in a diamond shape. During the positive half-cycle of input voltage vin the terminal ‘A’ is at positive potential with respect to the terminal ‘B’ and because if this diodes D1 and D2 are forward biased whereas diodes D3 and D4 are reverse biased. The current therefore flows through diodes D1, D2 and load resistor RL. During the negative half-cycle of input voltage waveform, on the other hand, the diodes D3 and D4 are forward biased whereas the diodes D1 and D2 are reverse biased. As a consequence, current flows through diodes D3 and D4. The input and output voltage waveform may be analytically written as:

and
where

Circuit Diagram

Procedure:

1. Connect the circuit as shown in the circuit diagram.
2. Give the input signal as specified.
3. Switch on the power supply.
4. Note down the value of AC and DC voltages from the CRO
5. Draw the necessary waveforms on the graph sheet.

Observations:

1. Observe the output waveform from CRO.
2. Measure the value of AC and DC voltages of the output waveform from the CRO.
3. Calculate
   
   1. Ripple Factor
   
   Ripple factor is defined as the ratio of effective value of AC component to the average DC value.
   Ripple Factor (r),
   
   2. Efficiency
   Efficiency, eta is the ratio of the dc output power to ac input power:
   
   The maximum efficiency of a Full Wave Rectifier is 81.2%.
   
   3. Form Factor
   Form factor is defined as the ratio of the RMS value of the output voltage to the average value of the output voltage.
   
   
   4. Peak Factor
   Peak factor is defined as the ratio of the peak value of the output voltage to the rms value of the output voltage.
   
   
   
   

VLab Observations Obtained:

1. output waveform frequency =1KHz
2. Oupur Voltage V_pl = 1.02V
3. V_rms = V_pl/squareroot2 = 0.721V
4. V_dc = 2V_pl/pi = 0.649V

Calculations:

1. Ripple Factor

Ripple factor is defined as the ratio of effective value of AC component to the average DC value.
Ripple Factor (r),
Experimentally,

2. Efficiency
Efficiency, eta is the ratio of the dc output power to ac input power:

Experimentally,

3. Form Factor
Form Factor is given by,

Experimentally,

4. Peak Factor
Peak Factor is given by,

Experimentally,

Result:


The Full Wave Rectifier circuit design output waveforms have been studied and the required parameters have been calculated.



Precautions:



1. Connections should be verified before clicking run button.
2. The resistance to be chosen should be in Kohm range.
3. Best performance is being obtained within 50Hz to 1Mhz.