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 Topic Title: Transformer Calc Topic Summary: Transormer Calculation Created On: 16 December 2011 01:04 PM Status: Post and Reply Linear : Threading : Single : Branch
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 16 December 2011 01:04 PM Ibadan696 Posts: 18 Joined: 14 September 2007 Hi Guys, I am a bit confused with the No Load(open circuit) calculation for the transformer. My lecturer says to calculate Ro and Xo as follows Zo= Vo/ Io were Vo= input voltage and Io= primary current then using phasors, Ro = Zo cos0 and Xo = Zo sin0 were 0 is the angle theeta( apologies for spelling theeta) I thought this could be wrong because calculating backwards does not add up. From my personal research work I think as follows Ro =V^2/ Po, and on calculting reactive power Qo Xo= V^2/ Qo or other method Ic = Io cos0 = core loss current Im= Io sin0= magnetizing current then Ro= V/ Ic and Xo= V/ Im I desperately need your help on this one so I can finish off my lab work
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