basic formulas for ideal transformer

Status
Not open for further replies.

sam_s.pitt

Newbie level 4
Joined
Sep 24, 2012
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,329
A dummy question!
When we analyse circuits containing ideal transformers, we describe the transformer by the equation below:
v2/v1=n, where n is the ratio between the number of turns in secondary to the number of turns in primary.
But, what if i place a voltage source in primary and short circuit the secondary?
 

if its a "perfect "transformer, then it will reflect a short circuit back, so the current will be infinite. In real life the transformer will have a DC resistance in both windings and leakage inductance, this appears as a small series inductance to the reflected impedance and the series DC resistance. This will then reduce the current from infinite to an actual (high) figure.
Frank
 

Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…