How can i detect zero crossing of current for inductive load

Status
Not open for further replies.
K

kam313

Newbie level 1
Joined
Jan 20, 2013
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Visit site
Activity points
1,287
I am controling the input (0-230v) of high voltag transformer (10 kva) using autotransformer, that is an expensive equipment, i want to know can i replace autotransformer with triac switching and also how can i detect current zero crossing in this case ? thanx in advance for your valueable thoughts.
 

For zero-crossing, check this:

https://www.edaboard.com/blog/1807/

However, you can not replace the auto transformer with triac-based circuit. For controlling the voltage (average voltage actually), you will use either phase angle control or pulse skipping modulation, both of which will mess up the sine wave. With phase angle control, you will get a distorted signal. With pulse skipping modulation, you will get a non-continuous signal. There are more problems associated.

These methods may work in some cases. However, the triac-based circuit will not be a replacement you can always expect to use.

Look into using AC-AC converters utilizing MOSFETs/IGBTs.

Hope this helps.
Tahmid.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…