Temeperature process station using Arduino, triac, nichrome wire and blower fan

Projects General Guidance
1

Hi everyone,

My project is to develop a working setup for Temperature process station. I am using Arduino, Nichrome wire of 4.89 ohm/m (24SWG) for heating, external DC supply of max of 30V, Triac BT16, K-type Thermocouple sensor with MAX 6675 module.

I tried heating the coil with variable DC supply (kept increasing it until it reaches 30V and 750mA)and read the temperature by keeping the sensor near the nichrome wire. It almost took around 10 minutes to reach 100 deg C from 40deg C and the response is also linear.

Motive:
To heat the coil fast and also to have an oscillatory response, to design a model for the controlling process (PID control by data-driven modelling) and also to use a 12V DC fan as a blower to decrease coil temperature. To keep the temperature around the setpoint.

What are the possible ways to make this setup?

Thanks a lot in advance

2

To heat it faster you will need more power .

3

Please explain the use of a triac in your scheme. Put the thermocouple as close as possible to the center, lengthwise, of your nichrome heater. The end connections act as heat sinks and will always be cooler than the center.

Paul

4

A TRIAC won't work on DC because it latches-on until current drops to zero. (In AC circuits there is a zero-crossing twice per cycle.)

5

I think OP simply misspelled MOSFET. That would work just fine.

Or a TRIAC and a good old 220V/30V transformer instead of a fancy 30V DC power supply :slight_smile: