Transformer dot prob don't understand (with sol)

  • Thread starter ssadi
  • Start date
  • #1
3
0
The problem:
attachment.php?attachmentid=41241&stc=1&d=1322238516.png

Solution in the spoiler:
attachment.php?attachmentid=41240&stc=1&d=1322238398.png

I don't know how to do the problem (a), but I also don't understand the answer (top of coil 3?). Can you give me the process on how to do the problem (a), i.e. in general how do I assign dots to coils in circuits? :)
 

Attachments

  • Untitled.png
    Untitled.png
    8 KB · Views: 362
  • Untitled1.png
    Untitled1.png
    12.4 KB · Views: 345

Answers and Replies

  • #2
3
0
The problem:
attachment.php?attachmentid=41241&stc=1&d=1322238516.png

Solution in the spoiler:
attachment.php?attachmentid=41240&stc=1&d=1322238398.png

I don't know how to do the problem (a), but I also don't understand the answer (top of coil 3?). Can you give me the process on how to do the problem (a), i.e. in general how do I assign dots to coils in circuits? :)

the answer was wrong, it should be right side for coil 3, after finding that out i understand.
 
  • #3
384
3
Assume that the conductor enters the core from the back and exits the core from the front.
Put a dot where the conductor exits the core.
On the left hand coil the conductor exits the core on the top. (It enters the core on the bottom.
On the right hand coil the conductor exits the core on the top. Put a dot at the top of the right hand coil.
On the bottom coil the conductor exits the core on the right. Put a dot to the right of the bottom coil.
 

Related Threads on Transformer dot prob don't understand (with sol)

  • Last Post
Replies
5
Views
725
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
6
Views
2K
Replies
1
Views
2K
Replies
82
Views
5K
Replies
24
Views
11K
Replies
35
Views
3K
  • Last Post
Replies
8
Views
14K
Top