1、NSIv)(tI IIABqFEkklFAkkd)(电源内lEkdABklEdlEqkd)(电源内qAktiddtdd 0ddtnn0ddtNN000i0i0ddtnN00in0ddtN00ivvvvtRRIiiddtqidd21dttiitIq21d1RR21Ni21tttNdddddd21N，21iitiddNN21 nIBr0MNNBSnISNr0dtdidtdInSNr0 Vi75.0RIii0.752A21ttiidtIqtIiC75.0nISNr0IvabxdxxbxISBSBd2ddd0 xbxIalld2d0lalIbln20tiddlltlaltlIbd/dd/d20)(20
2、allIabv,sin0tIINNB dSSldxxINadd2NIldad2lnNI ltdad02sinlndadtlNIrlncos200SBdsNdtdixoLIlsdSdBdmdtdivEEEeFevBeE BlvEliBveFmlEKidlBvid)(BvqFkqFEkkBvEkldBvdi)(lBvLid)(BAlAOilBd)(vROlBdvROlBld22BROA dvdBR d212tiddtBRdd212221BRl dEkLil dEL感dtdmil dEL感dtdmSdBdtddtdSmSdtBSl dELi感SdtBS0ldEL静0iLl dE感感E感E与与 的关系
3、：的关系：tBBtBi感EtB感E与与 成成右手螺旋关系右手螺旋关系l dELi感SdtBSIBmLImABKLItddtLItILddddtmLddtILLddILm/tILLddtiddlBvLid)(l dELi感SdtBSnIBNBSmlNn SIlNm2VnSlNILm22II21RrRrIBr2021,RrRr0BSdSBddrlrIrd2021d20RRrrlrI120ln2RRIlr120ln2RRIlLrrl1R2Rr1121IB12121IMtIMdd12121MMM211221212IMI1I2 212111ttBtItIMdd21212tIMdd121tIMdd2121
4、l2l111InB111IlNSBN122111221lIRNN12121IM1221lRNN221Vnn222InB222IlN1l2lSBln221122221SlInn2221VInn21212IM221VnnMMM2112dtdIMi1dtdIlRNN11221LRKiRLtRititiLtidd)dd(d2000200ddidtIttRiLitiiRL0020ddtItRiiLitRiiLidd2 0ddIiLiAA电流电流 I 消失过程中，自感电动势所做的功消失过程中，自感电动势所做的功221LImW(自感磁能公式自感磁能公式)(1)在通电过程中在通电过程中0iRLtRititiL
5、ddd 2tidtiLdtRid2电源做的功电源做的功自感电动势反抗电流建立的功自感电动势反抗电流建立的功电阻消耗的焦耳热电阻消耗的焦耳热(电源的功转化为磁场的能量电源的功转化为磁场的能量)221LIWm(2)与电容储能比较与电容储能比较CQWe22自感线圈也是一个储自感线圈也是一个储能元件，自感系数反能元件，自感系数反映线圈储能的本领映线圈储能的本领IILiLitiA00dd讨论讨论:rnIBr0IBVnnISInlINLr202222121VInLIWm222221nBVnVB22Vwm22222HBHBVWwmm222BHBwmEDEre212120wVBHVwWVVmmd21dVEDV
6、wWVVeed21d22 RIrH02021Hwm422208RrIdVwdWmmrldrRrI2842220lWWmm1620IvmmdVwWRdrrRlI0342041620lIdrrRlI34204BHwm21rNIBr2021RrRrNIH222220421rINr1R2RhrrhVd2dVmmVwWd21d2822220RRrrrhrIN1222ln4RRhIN221LIWmIILm/tILLdd121/IM tIMdd121221LIWm自感线圈自感线圈储存磁场能量储存磁场能量22222HBHBwm引言IRDI位移传导全IIILIIIlH位移传导全dSStDId传导tIDddBCI
7、R1P2P0DE 0tDjDt 2RICSLCStDIlHdd:1P:2PCIrH1121012 rIBC222 rHDIDjr2222022rRIBCSSDdSESdiqVVd0dLlE0dSSBLlHdiI感生静电EEE感生静电DDD位移稳恒BBB位移传导HHHSSDdSSDDd)(21SEESd)(210iqSiqSDd)d(VVSSBd000SSBBd)(210dSSBLlEd0SStBdStBtlESLddddLlHdiISStDdSLd)(dSjlHtDLlEEd)(21L21d)(lHHSdtBldESLiiSqSdD内iidiLIIldH)(0SdBS感生静电EEE感生静电DDD位移稳恒BBB位移传导HHHtDJHDtBE0 Bu 1 cusm1031800ncurr HESuHuE第第4章结束章结束Homework：2020/11/550谢谢观赏！
