Experiment: Gate triggering of SCR with various gate currents.
Aim: To simulate Gate triggering of SCR with various gate currents.
Material required:
1. MULTISIM Software Loaded PC 1 No.
2. Printer 1 No.
Procedure:
1. Theory.
2. Symbol.
3. Design Circuit.
4 . Simulation Procedure.
5. Output Waveform.
THEORY:
The term SCR stands for silicon controlled rectifier which is one of the most important members of the thyristor family. It is more popular than the other Thyristors like TRIAC, SCS, DIAC, etc. that some people even use the words Thyristor and SCR interchangeably. So next time when someone says just “Thyristor” in general, then they are referring to the SCR.
SCR SYMBOL:
DESIGN CIRCUIT
Simulation Procedure:
• Open MULTISIM Software.
• Click=> New => Design1.
• Click save as in Desk Top rename the Design1 to your circuit name.
• Go to Component tool bar and select the components.
• Draw the circuit diagram of Gate triggering of SCR.
• Connect the CRO above mentioned circuit.
• Click simulate button or press F5 key => RUN.
• Note down the Time period and calculate the frequencies.
• Record the output waveforms.
Result:
The Gate triggering of SCR is designed and its output is verified using MULTISIM software, measured wave waveforms.
Video Tutorial:
Questions with answers:
1. What is fullform of SCR
Silicon Controlled Rectifier
2. How many terminals of SCR and their names
3 terminals. Anode, Cathode and Gate
3. Why is it called Silicon controlled rectifier
It is made up of silicon. It can control Rectification
4. What is rectification
Conversion of AC to DC
5. How can SCR control the rectification
By triggering of SCR
Video Tutorial:
All experiments should be designed and verified through simulation tools like Multisim.
1. Zener diode (Forward and Reverse bias characteristics)
2. Rectifier circuits ( Half wave, Full wave, Bridge rectifier with filters)
3. Power supply with Zener diode as Regulator
4. Common Base transistor output characteristics
5. Common emitter amplifier (Implementation of Current Series negative feedback)
6. Emitter follower (Implementation of Voltage Series negative feedback)
7. RC Coupled amplifier (Implementation of the concept of multistage amplifier)
8. Clippers and Clampers
9. RC Phase shift oscillator (Medium frequency Sine wave generators)
10. Hartley oscillator (High frequency Sine wave generator)
11. Astable Multivibrator (Square or Rectangular wave generator)
12. Gate triggering of SCR with various gate currents.
