电工基础教学课件第5章互感电路.ppt

5-1 5-1 互感系数和耦合系数互感系数和耦合系数5-2 5-2 互感电压及同名端互感电压及同名端5-3 5-3 去耦等效电路去耦等效电路5-4 5-4 含有互感元件的正弦电路含有互感元件的正弦电路11111NLi 111111ddiuLt 221211NMi 21122ddiuMt 2111111NLi 221211NMi 22222NLi 112122NMi tiMudd211 tiMudd122 tiLudd1111 tiLudd2222 12MkL L2211122211212211211122212112212NNM MiikNNL Lii21121122k，iiui1 i2i3tiMudd211 tiMudd122 tiLudd1111 tiLudd2222 SiSii1i21u2u1211ddddiiuLMtt2122ddddiiuLMtt122111,ddd0diiuLiuMtt 22221ddd,diuMtiuLt 1122,ii ii1,0i 1i2i1u2u122111,dd,d0diiuMiuLtt 222121,dd,d0diiuuLttiM 1211ddddiiuLMtt2122ddddiiuLMtt1u2u1u2u122111,ddd0diiuLiuMtt 222121,dd,0ddiiiMututL 1211ddddiiuLMtt2122dd()ddiiuLMtt 1i2u2i1u2i1i1u2u21ddMiuMt 12ddMiuMt 21ddMiuMt 12ddMiuMt 1211ddddiiuLMtt 2122ddddiiuLMtt 1211ddddiiuLMtt 2122ddddiiuLMtt 12222111jjjjIMILUIMILU 1i2u1u2idtdiMdtdiLu2111 dtdiMdtdiLu1222 2i1i1u2u1211ddddiiuLMtt 2122ddddiiuLMtt 12222111jjjjIMILUIMILU 21uuu dtdiMdtdiLu 11dtdiMdtdiLu 221U2UUIILIMLLIMLIMLUUUeq j)2(j)jj()jj(212121 MLLLeq221 21uuu dtdiMdtdiLu 11dtdiMdtdiLu 22ILIMLLIMLIMLUUUeq j)2(j)jj()jj(212121 MLLLeq221 112122+jjjjUL IMIUMIL I 21III IUZeq 211jjIMILU 122jjIMILU 21III 211jjIMILU 221jjILIMU 21III 12122122j()LLMIIIUL LM221jjILIMU 211jjIMILU 21III 2211jjIMIMLUM 221111jjILLIMLUL 2211)(j)(IMLLUML 得得ML1加、减加、减UMLLMLI)(j22112 221212jjIMLILLUL 2212jjIMLIMUM 减、加减、加UMLLMLI)(j22121 MLLMLLIUZeq2j21221 MLLMLLLeq221221 21113jjIMILU 213III 22123jjILIMU 132III 31113j)(jIMIMLU 231III 22323)(jjIMLIMU 。ui11IUZi i2U212112jj3)j(3j6j2IIIIIIU )-j(3j2j)64(2112IIII 12jj)34(II 12j)34(jII 113j4j-jj3IIU 11)j88.216.0()3j41j3(II j88.216.0iZ(4j4)(j2j3)4j4j4j44j4j2j34j3j40.16j1.120.16j2.88iZ解耦等效法解耦等效法i1i2+u1-+u2-1222jjMIIRL 11112(j)jURL IMI+U1-1111122j(j)jjMURL IMIRL 2211122jjMZRLRL abcabc