This experiment is aimed at converting AC (single phase) to DC using a diode (uncontrolled) rectifier. The circuit is implemented in simulation as well as hardware and the performance is studied.
Learning Outcomes:
Operation and analysis of a single phase rectifier for various loads
Introduction to diode rectifier:
A rectifier is a circuit used to convert AC voltage to DC voltage. There are two types of rectifier circuits: uncontrolled and controlled. An uncontrolled rectifier does not have control on the output voltage. The switch used in this case will be a diode.
There are two types of uncontrolled rectifiers: This section emphasizes the single phase full wave bridge diode rectifier. The rectifier is as depicted in Fig. 1. Fig. 2 represents the Full wave rectifier waveform.
During the positive half cycle of the input supply, the diodes D1 and D2 are conducting, and the output voltage is as depicted in Fig. 2. During the negative half cycle diodes D 3 and D4 conduct. Since the load is resistive, the output voltage follows the input.
Aim: To simulate the Diode Rectifier in MATLAB Simulink
PROBLEM 1:
CALCULATION
Form Factor = \(V_{rms}/ V_{dc}\) =
Ripple Factor = \(\sqrt{FF^21}\) =
Procedure for R Load:
Note: The Voltage Adjustment Controls are a pair of push buttons to finely adjust the voltage to required value.
Note: The Voltage Adjustment Controls are a pair of push buttons to finely adjust the voltage to required value.

R Load 
RL load 
V_{RMS} 


I_{RMS} 


V_{AVG} 


I_{AVG} 


Form factor 


Ripple Factor 


FFT Analysis 

Output Voltage 

THD in % 


V_{Fundamental }(RMS) 


2^{nd} Harmonics (V) (RMS) 


3^{rd} Harmonics (V) (RMS) 


Input Current 

THD in % 


I_{Fundamental }(RMS) 


2^{nd} Harmonics (I) (RMS) 


3^{rd} Harmonics (I) (RMS) 



R Load 
RL load 
V_{RMS} 


V_{AVG} 


Form factor 


Ripple Factor 


FFT Analysis 

Output Voltage 

THD in % 


V_{Fundamental }(RMS) 


2^{nd} Harmonics (V) 


3^{rd} Harmonics (V) 


$$ \begin{aligned} & \mathrm{THD}=\sqrt{\frac{V_{AC \, RMS}^2V_{1 \, RMS}^2}{V_{1 \, RMS}^2}} \times 100 \% \\ & V_{AC \, RMS}=\sqrt{V_{RMS}^2V_{AVG}^2} \\ & 20 \log \left(\mathrm{V}_{\mathrm{Fundamental}}(\mathrm{RMS})\right)= \_ \_ \_ \_ \_ \_ \_ \_ \mathrm{dB} \end{aligned} $$