251变压器的损耗和效率 变压器的效率 变压器功率流程图 1=2×100% R R B×100% 100% P2+2P cul -my e Perp Pan2=m/2 R2 P R P2=P-(Pcu+ Pcu+pre)=p-2p2.5.1变压器的损耗和效率 变压器功率流程图 Rm m jx 1 1 R jx 1 I 2 2 jx R U2 2 − I ZL 0 I P1 P2 1 2 pcu1 = mI1 R 0 2 0 p pfe mI Rm = = 2 2 2 2 2 2 2 mI R pcu mI R = = ( ) P2 = P1 − pcu1 + pcu2 + pf e 变压器的效率 100% 1 2 = P P 100% 1 1 − = P P p = P1 −p 100% 2 2 + = P p P