Jump to content
Electronics-Lab.com Community

Need help for motor driving with triacs


mesuthh

Recommended Posts

Hello people;
I really need help friends
I am tring to drive a single phase (230V AC) motor 4A with BT137(8A), but triac gets hot like 35 celcius degree (even I am using cooler) and after some switching it is getting failed. So that later on I have changed the triac with BTA41(40A) and heatshink, but it is still hot around 30 degree, and in one week BTA41 also gets failing. I am tring to drve the triac with Moc3041, and I am tring to switching the triac when 5Vdc available on Moc3041.
I have tried to use snubber but it is not solving the problem
you can reach the view of my circuit on 

here I am triying drive the motor with 5V dc control to moc3041 so triac fries and the motor starts, and one more think I am also drving a 25uf 400 V capacitor (paralell with the motor) with that motor for compansating

if someone has an advice I will be really thankfull to him/her
Regards

Link to comment
Share on other sites


  • 10 months later...
  • 4 months later...
7831-cat_out1.gif
http://www.electro-tech-online.com/electronic-projects-design-ideas-reviews/93323-switching-ac-loads-triac.html

I think the resistor is too small needs to be 330


BT137 Datasheet

http://www.nxp.com/documents/data_sheet/BT137_SERIES.pdf


BTA41

http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00002263.pdf

Moc3041 Datasheet

http://www.electro-tech-online.com/custompdfs/2009/05/moc3041.pdf

Link to comment
Share on other sites

  • 1 month later...
  • 2 years later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
  • Create New...