I have a basic question about transformer ratios, if I have 3 windings, a pri, a sec and an aux, what's the voltage expression for each winding? My guess is Vpri = Npri/Nsec Vsec = Nsec/Npri Vaux = Naux/Npri is this right? thanx!
transformer winding ratio question
Started by ●March 9, 2012
Reply by ●March 9, 20122012-03-09
On Fri, 09 Mar 2012 12:51:52 -0800, panfilero wrote:> I have a basic question about transformer ratios, if I have 3 windings, > a pri, a sec and an aux, what's the voltage expression for each winding? > My guess is > > Vpri = Npri/Nsec > > Vsec = Nsec/Npri > > Vaux = Naux/Npri > > is this right? > > thanx!I think you need to consider the voltages as well as the primaries. That is: Vsec = Vpri * Nsec/Npri That sort of thing. I don't think you normally calculate Vpri; I think it's what you choose (within limits of the transformer, of course). Then you use Vpri to calculate the other voltages, based on the winding ratios to Npri. It seems to me that Vaux would be: Vaux = Vpri * Naux/Npri -- Stenderup's Law: The sooner you fall behind, the more time you will have to catch up. -- "Regardless of the legal speed limit, your Buick must be operated at speeds faster than 85 MPH (140kph)." -- 1987 Buick Grand National owners manual.
Reply by ●March 9, 20122012-03-09
On 2012-03-09, panfilero <panfilero@gmail.com> wrote:> I have a basic question about transformer ratios, if I have 3 > windings, a pri, a sec and an aux, what's the voltage expression for > each winding?V_pri/N_pri = V_sec/N_sec = V_aux/N_aux -- ⚂⚃ 100% natural --- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---
Reply by ●March 9, 20122012-03-09
On Mar 9, 3:39=A0pm, Chiron <chiron613.no.sp...@no.spam.please.gmail.com> wrote:> On Fri, 09 Mar 2012 12:51:52 -0800, panfilero wrote: > > I have a basic question about transformer ratios, if I have 3 windings, > > a pri, a sec and an aux, what's the voltage expression for each winding=?> > =A0My guess is > > > Vpri =3D Npri/Nsec > > > Vsec =3D Nsec/Npri > > > Vaux =3D Naux/Npri > > > is this right? > > > thanx! > > I think you need to consider the voltages as well as the primaries. =A0Th=at> is: > > Vsec =3D Vpri * Nsec/Npri > > That sort of thing. =A0I don't think you normally calculate Vpri; I think > it's what you choose (within limits of the transformer, of course). =A0Th=en> you use Vpri to calculate the other voltages, based on the winding ratios > to Npri. > > It seems to me that Vaux would be: > > Vaux =3D Vpri * Naux/Npri > > -- > Stenderup's Law: > =A0 =A0 =A0 =A0 The sooner you fall behind, the more time you will have t=o catch> up. > > -- > "Regardless of the legal speed limit, your Buick must be operated at > speeds faster than 85 MPH (140kph)." > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 -- 1987 Buick Grand National owners manua=l. sorry I forgot to include the voltages, I meant Vpri =3D Vsec*Npri/Nsec Vsec =3D Vpri*Nsec/Npri Vaux =3D Vpri*Naux/Npri which seems right after reading the responses, thanks
