电工基础教学课件第5章互感电路.ppt

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1、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 i2i3t

2、iMudd211 tiMudd122 tiLudd1111 tiLudd2222 SiSii1i21u2u1211ddddiiuLMtt2122ddddiiuLMtt122111,ddd0diiuLiuMtt 22221ddd,diuMtiuLt 1122,ii ii1,0i 1i2i1u2u122111,dd,d0diiuMiuLtt 222121,dd,d0diiuuLttiM 1211ddddiiuLMtt2122ddddiiuLMtt1u2u1u2u122111,ddd0diiuLiuMtt 222121,dd,0ddiiiMututL 1211ddddiiuLMtt2122dd()d

3、diiuLMtt 1i2u2i1u2i1i1u2u21ddMiuMt 12ddMiuMt 21ddMiuMt 12ddMiuMt 1211ddddiiuLMtt 2122ddddiiuLMtt 1211ddddiiuLMtt 2122ddddiiuLMtt 12222111jjjjIMILUIMILU 1i2u1u2idtdiMdtdiLu2111 dtdiMdtdiLu1222 2i1i1u2u1211ddddiiuLMtt 2122ddddiiuLMtt 12222111jjjjIMILUIMILU 21uuu dtdiMdtdiLu 11dtdiMdtdiLu 221U2UUIILIML

4、LIMLIMLUUUeq 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 22

5、11)(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