AC Thyristor Operation

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram CDF Player or other Wolfram Language products.

Requires a Wolfram Notebook System

Edit on desktop, mobile and cloud with any Wolfram Language product.

Select from an SCR (Silicon Controlled Rectifier) or a TRIAC (TRIode for Alternating Current) to observe the output voltage characteristics. Load current is optionally shown for a resistive as well as for a resistive-inductive load.

Contributed by: Harley H. Hartman (March 2011)
Open content licensed under CC BY-NC-SA


Snapshots


Details

This Demonstration provides a graphical representation as well as calculated values for the output voltage of both a simple SCR and simple TRIAC circuit. You can select from an SCR, an SCR with current shown, or a TRIAC. You can then change the triggering angle of the device. If the SCR with load is selected, you can adjust the resistance as well as the inductance of the load. Triggering angle and conduction angles are also displayed. The average DC output voltage is given by , where is the trigger angle and is the cut-off angle. The RMS value of the output voltage is given by , where is the conduction angle.

Formulas and principles referenced from: D. Hart, Introduction To Power Electronics, Upper Saddle River, NJ: Prentice Hall, 1996.

Equations referenced from: SCR Manual, 5th ed., (D. R. Grafham and J. C. Hey, eds.), New York: General Electric Company, 1972.



Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.
Send