The document describes modeling and simulating a single phase fully controlled bridge rectifier fed separately excited DC motor in MATLAB/Simulink. The model is developed to plot the average output voltage and current waveforms. Key steps include determining the critical speed expression, calculating torque based on voltage and current, and measuring outputs using various Simulink blocks. The simulation results match the theoretical calculations for average output voltage and current.

1. Title: :
Analysis of single phase fully controlled
bridge converter fed separately excited
dc motor .
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

2. Aim:
Create a model and simulate a single phase fully
controlled rectifier fed separately excited dc motor
using MATLAB /Simulink
to plot the average output voltage and output current
waveform
• Motor parameter :
Vrated : 200 V ; Nrated : 875 RPM ; Irated : 150A
Ra = 0.06 ohm ; La = 2.85 mH
Converter parameters:
single phase fully controlled Bridge Rectifier with
an ac source voltage of 220 V,50Hz for
firing angle α = 120 degrees and speed =-400 rpm
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

3. Step 2: Find ωm
IF ωm < ωmc
The drive is operating under continuous conduction mode
(or)
IF ωm > ωmc
The drive is operating under discontinuous conduction mode
Step1 : Find Critical speed expression (ωmc) for single-phase fully-controlled Bridge
rectifier
Formula used and Analytical Calculation:
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

4. Find the Torque
Step 3: Find “Ia = (Va –Eb) /Ra”
Step 4: Find “T”
Step 2: Find “K = (Vrated –Irated *Ra) / ωrated
Step 3: Find “Eb=K*ω
• Step 1: Find “Va”
• If continuous , Va = (2*Vm/π)*Cos(α)
• If discontinuous , Va =
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

5. S.no
Apparatus
Simulink Library
browser path
Block Parameters
1. Ac Voltage
Source
Simulink/
Simscape/
Simpower systems/
Second generation/
Electrical sources
Ac voltage
source
Amplitude = 220*1.414
Frequency = 50Hz
2. Thyristor Simulink/
Simscape/
simpower systems /
second generation/
power electronics
Thyristor Default values
Requirements : Software used:
MATLAB R 2013 b
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

6. 3. Pulse generator
(For Thyristor &
Thyristor 3 )
Simulink/
Sources
Pulse generator Amplitude = 1
Period (sec.) = 0.02
Pulse width (%) = 5
Phase delay (sec.) = 6.67e-3
4. Pulse generator
(For Thyristor 1 &
Thyristor 2)
Simulink
/Sources
Pulse generator Amplitude = 1
Period (sec.) = 0.02
Pulse width (%) = 5
Phase delay (sec.) = 16.67e-3
S.no
Apparatus
Library browser
path
Block Parameters
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

7. 5. Resistor,
Inductor
Simulink/Simscape/
simpower systems /
second generation/
Elements
series RLC
branch
R=0.06
L=2.85e-3
6. DC voltage source Simulink/
Simscape/
simpower systems/
second generation/
Electrical sources
DC voltage
source
Amplitude =
-87.31
S.no
Apparatus
Library browser path Block Parameters
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

8. 7. Voltage , current
measurements
Simulink/Simscape/
simpowersystem /second generation/
measurement
Voltage ,
current
measurement
Default
values
8. Powergui Simulink/ Simscape/
simpower system/second generation
powergui -
12. Mean Simulink/ Simscape/
simpower system /second generation/
Control &measurement Library /
Measurement
Mean Frequency =
50
S.no
Apparatus Library
Block Parameters
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

9. 13. Display Simulink/ Sinks Display -
13. Scope Simulink/ Sinks Scope -
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

10. Matlab /Simulink Diagram
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

11. 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02
-400
-300
-200
-100
0
100
200
300
OUTPUT Voltage and Current Waveforms:
for one cycle to find out Beta
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14

12. Result :
Average Output voltage Average Output current
Calculated Simulated Calculated Simulated
10/12/2016
Dr.R.SaravanaKumar , Professor, SELECT,VIT UNIVERSITY,Vellore-
14