I'm just trying to confirm something that I believe is true about transformers. If I have a transformer with a 230V Primary and a 18V Secondary that can supply 2A, would I be right in saying that the 2A on the Secondary would be seen as maybe 100mA on the Primary?
Then for say a 230V Primary and 600V Secondary Transformer, 150mA on the Secondary is seen as 1A on the Primary? The numbers used are only examples btw.
Transformers and Current
Moderators: pompeiisneaks, Colossal
-
Stevem
- Posts: 5144
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: Transformers and Current
The amperage change is in direct proportion to the turns ratio!
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
-
martin manning
- Posts: 14308
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: Transformers and Current
For an ideal transformer, the ratio of primary to secondary current is inversely proportional to the voltage ratio, i.e. Vs/Vp = Ip/Is.
For your first example, 18/230 = Ip/2, Ip = 0.157A
For your second example, 600/230 = Ip/0.150, Ip = 0.391A
For your first example, 18/230 = Ip/2, Ip = 0.157A
For your second example, 600/230 = Ip/0.150, Ip = 0.391A
-
Littlewyan
- Posts: 1944
- Joined: Thu Sep 12, 2013 6:50 pm
- Location: UK
Re: Transformers and Current
Fantastic! Thanks for that.