WOW- How to control a high-current AC loads by DC circuit-2 (using Opto-TRIAC)

This is another way to control high-current AC loads using Opto-TRIAC. The design by principle is similar to the circuit of magnetic relay and contactor counterpart. The use of Opto-TRIAC is also electrically isolated between high current AC loads and DC control. The advantages of Opto-TRIAC are rugged, more electrical isolation and much cheaper than the electro-mechanical type. The disadvantage of Opto-TRIAC is the strict switching schemes and load consideration.

There are a lot of varieties in the design. High end designs are using the more advanced type such as the SSRs or Solid State Relays.

To help you better comprehended on Opto-TRIACs and its design techniques, hobbyists, technicians and engineers must check this following documentation in downloadable PDF format.

-Webscatter/Nov05,2010