This experiment is aimed to study the operation of Single Phase, Phase controlled Bidirectional AC to AC controller using TRIAC with R and RL load by observing the output waveforms. The circuit is implemented in simulation as well as hardware and the performance is studied
AC to AC voltage converters operates on the AC mains essentially to regulate the output voltage. Portions of the supply sinusoidal appear at the load while the semiconductor switches block the remaining portions. They are called Phase Angle Controlled (PAC) ACAC converters or ACAC choppers. The TRIAC based converter may be considered as the basic topology. Being bidirectionally conducting devices, they act on both polarities of the applied voltage.
To simulate Single Phase, Phase controlled Bidirectional AC to AC controller with R load in MATLAB Simulink
Implement the 1phase,Phase controlled Bidirectional AC to AC controller with R load of \(12.5~\Omega \) and observe the changes in the output voltage waveform at different firing angles. (Input voltage: 50 V Peak = 35.35 V (RMS) and 50 Hz)
To simulate Single Phase, Phase controlled Bidirectional AC to AC controller with RL load in MATLAB Simulink
Implement the 1phase,Phase controlled Bidirectional AC to AC controller with the R load of \(12.5~\Omega \) and L of 6 mH and observe the changes in the output voltage waveform at different firing angles. (Input voltage: 50 V Peak = 35.35V (RMS) and 50Hz)
Note: The Voltage Adjustment Controls are a pair of push buttons to finely adjust the voltage to required value.
S. no 
Firing angle (measured in time) msec 
Firing angle (measured in time converted into angle) degrees 
RMS Output voltage

RMS Output Current 
1. 
0 msec 
0^{0} 


2. 
2.5 msec 
(2.5/10*180^{0}) = 45^{0} 


3. 
5 msec 
90^{0} 


4. 
6.66 msec 
120^{0} 


S. no 
Firing angle (measured in time) msec 
Firing angle (measured in time converted into angle) degrees 
RMS Output voltage

1. 
0 msec 
0^{0} 

2. 
2.5 msec 
(2.5/10*180^{0}) = 45^{0} 

3. 
5 msec 
90^{0} 

4. 
6.66 msec 
120^{0} 

S. no 
Firing angle (measured in time) msec 
Firing angle (measured in time converted into angle) degrees 
RMS Output voltage

RMS Output Current 
1. 
0 msec 
0^{0} 


2. 
2.5 msec 
(2.5/10*180^{0}) = 45^{0} 


3. 
5 msec 
90^{0} 


4. 
6.66 msec 
120^{0} 


S. no 
Firing angle (measured in time) msec 
Firing angle (measured in time converted into angle) degrees 
RMS Output voltage

1. 
0 msec 
0^{0} 

2. 
2.5 msec 
(2.5/10*180^{0}) = 45^{0} 

3. 
5 msec 
90^{0} 

4. 
6.66 msec 
120^{0} 
