Contents
What kind of loads can be controlled with TRIACs?
Therefore in general loads which convert energy into heat like incandescent bulbs or heaters etc only become suitable with triacs as the switch and devices like transformers, AC motors and electronic circuits are a big NO!
How does a TRIAC circuit control AC power?
A triac is a three-terminal (MT1, gate, and MT2) solid-state thyristor that uses the alternative symbols in Figure 1 and acts like a pair of SCRs wired in inverse parallel and controlled via a single gate terminal. It can conduct current in either direction between its MT1 and MT2 terminals and can thus be used to directly control AC power.
How does triggering of triac with synchronization work?
The principle here now gets transformed to triggering of the triac with synchronization by the mains voltage. The idea to very extent neutralizes the above issue and becomes very much coordinated even with inductive type of loads.
What happens to the TRIAC when the lamp is closed?
When SW1 is open, the triac acts as an open switch and the lamp passes zero current. When SW1 is closed, the triac is gated on via R1 and self-latches shortly after the start of each half-cycle, thus switching full power to the lamp load.
What can a TRIAC phase controller be used for?
Here we try to investigate a few enhanced triac based phase controller circuits which can be recommended for controlling or operating inductive loads like transformers and AC motors much safely than earlier traditional triac based circuit dimmer circuits. A Triac is a semiconductor device used for switching AC loads.
Why is RMS load voltage higher in TRIAC circuit?
Okay, I ran your LTSpice simulation- there is something very suspicious about that triac model- it has 68V “on” voltage with only 13.5A current and 15V at 2.7A. Naturally that will make the RMS load voltage much higher at the lower current.
What is the dissipation of a TRIAC AC?
I looked at triac dissipation (as you told) and it is around 935W which for the triac is impossible, for sure there is a problem with the spice library I am using.