Triac Heater Control Schematic

When a triggering current is applied to triac gate it is switched on by means of its inbuilt diodes embedded back to back between g terminal and and a1 terminal.

Triac heater control schematic.

These 2 diodes are installed at the p1 n1 and p1 n2 junctions of the triac. Besides a popular bimos op amp ca3140 ic2 is used to sense the status of the temperature sensor ic1 which also controls a solid state switch formed by a high power triac bt136 t1. The following diagram shows the simplified schematic of a triac and also its internal silicon structure. Hi swagatam how hot would this.

I want to make a fan heater with a 1000w halogen globe. Use the output to control a triac and the heater as the load. To avoid premature burnout i want the globe to come on slowly 5 sec. Good site for ideas.

However a commercial triac dimmer should not be used as a motor speed controller as generally triac light dimmers are intended to be. In this article we will try to understand the making of a 1500 watt simple heater controller circuit at 25 amp current rate using an ordinary triac based dimmer switch circuit. The simplest led control circuit that can be used in the figure 3 system consists of an on off toggle switch that when closed connects the ic1 led to the 12v dc supply via a 680r resistor that limits the led on current to about 15ma. Using advanced snubber less triacs.

This simple triac speed control circuit is suitable for not only ac motor speed control but for lamp dimmers and electrical heater control and in fact is very similar to a triac light dimmer used in many homes. When a triac is used in an electric heater driving circuit a quick blow fuse with a current.