Name of the Staff member: A. Siva Sankar, L/EEBranch: Electrical and Electronics Engg.institution:Govt.Polytechnic, ProddaturSemester:IVTopic: Single Phase Transor!ersSubtopic: E"uivalent #ircuit Sub.Code:EE$%&' ( A# )achines$IDuration:*& !in.Teaching Aids: PPT, Ani!ations1EE 403.17+e,art!ent o Technical Education Andhra PradeshRecapRecap-.e have discussedin the last session a/out the 0ayso solving various ,ro/le!s on transerring resistancesro! one side o transor!er to the other and inding ter!inal voltage at any given load.2 EE 403.17Objective:Objective:1,on co!,letion o this to,ic the students 0ould /e a/le to understand-The develo,!ent o co!,lete e"uivalent circuit o a transor!er.-The develo,!ent o a,,ro2i!ate e"uivalent circuit reerred to ,ri!ary and/ or secondary3 EE 403.17!uiva"ent Circuit!uiva"ent Circuit1 1 11 1 1 112 0 10jX R Z whereZ I E VI I II I Iw+ =+ =+ =+ =The ,eror!ance e"uations 0hich are already discussed are su!!ari3ed as ollo0s:4 EE 403.17.,,2'22 2 22 2 2 2drawn be can r transforme the of circuitequivalent the equations above the FromKI IandjX R Z WhereZ I E V=+ = =5 EE 403.17!uiva"ent Circuit of a Rea"!uiva"ent Circuit of a Rea"TransformerTransformer-4& :core loss co!,onent, This resistance !odels the active loss othe core-5& : !agneti3ation co!,onent, This reactance !odels the reactive loss o the core-46 and 56 are resistance and reactance o the ,ri!ary 0inding-47 and 57 are resistance and reactance o the secondary 0indingEquivalent Circuit of a Two-winding, 1-phase Transformer:6 EE 403.17Comp"ete e!uiva"ent circuitComp"ete e!uiva"ent circuit#ig $:!uiva"ent Circuit of a T%o&%inding' $&phase Transformer:7 EE 403.17-In transor!er analysis, it is usual ,ractice to transer the secondary "uantities to ,ri!ary side or vice versa 8ig 7: E2act e"uivalent circuit: All ele!ents reerred to ,ri!ary8 EE 403.17Appro(imate e!uiva"ent circuitAppro(imate e!uiva"ent circuit8ig ': A,,ro2i!ate e"uivalent circuit : Suiciently accurate or ,ractical a,,lications9 EE 403.178ig %:Si!,liied or! o a,,ro2i!ate e"uivalent circuit reered to ,ri!ary10 EE 403.178ig *: A,,ro2i!ate e"uivalent circuit reerred to secondary Ideal transformer11 EE 403.17-In the a/ove igures, the ideal transor!er has /een introduced to sho0 the transor!ation o voltage and current /et0een ,ri!ary and secondary.- V79:V7/;- I79:;I7-