电磁电器设计基础课件：第八章 交流磁系统

msBBmsBB具有恒磁链、变磁势的特点uRLuuuRuiRddLutcosmuUt4.44mUfW2mIW 具有涡流和磁滞损耗电磁吸力的脉动现象sinmt 2222001sinsin(1 cos2)222dmdmdmdpdjFFtFttFFSS2dmdpFFcos22dmdjFFt TdmFdpF)(tdFt0u（a）磁系统w131（b）等值磁路图311320(c)矢量图İ1W1W11I W 没有短路环，不考虑铁损及漏磁有短路环，不考虑铁损及漏磁（a）磁系统(b)等值磁路图İ1W131短路环W131dlx130222222jjdldlEWEWIrr 1122I WI W İ1w1-İ2w2İ2w22E112222()I WI WI W 22jdlI Wx 22(A/Wb)dldlWxr11(j)dlI Wx 31短路环W1222jdldlEWIrr2222222(W)dldldldlEWPxrr考虑铁损2(A/Wb)cPx(W)cccPp Vjx(A/Wb)H lB S 有短路环，考虑漏磁和铁损ag0（a）磁系统İ1w1（b）等值磁路图0 x313x311x122xdlx220ab13gGGIWu 或0 IW 已知气隙磁通，求线圈磁势及电压ag0İ1w10 x313x311x122xdlx220ababu 2131121(j)+j+jjabddlddddluxxxx abgu G abu 00 223300 xxx、和、011I W1102302300j()(j)ababI Wuxxxux U111110jUI REEW 01Ed İ1w1İ1R10 xabu 1EU0dx已知线圈磁势或电压，求工作气隙磁通11I W20(1 cos2)22dmddpdjFFtFFS()dpFfdF双E型拍合式吸入式0加短路环后的吸力211tandlx2211sinsin()mmtt 22221111(1 cos2)21 cos(2)2d mddpdjd mdd pd jFFtFFFFtFF22212121212121020 1cos2cos(22)222222mmd md md md md md md pd pd jd jFFFFFFFFFtFtSS121212()()dddd pdpd jdjFFFFFFFcos(22)djdjmFFt dpF0ddpdjmFFF)sin(1tdFtdpF0dFdF,1)(2 tdF)(1 tdFtsin2t21ddFF00012022001202012()()4()4mmmmdpuSSuSSFSS022201122122112012coscosmmmmmdldpd pdpdpuSuuSxSSFFFFSS0dpdpFF12d md mFFo21800djF o1190tan0dldlxx ，dlPdlxdlr1dlx1dF12d md mFF121212()()dddd pd pd jd jFFFFFFFcos(22)djdjmFFt0ddpdjmFFF2121cos2cos(22)22d md md jd jFFFtFtdlx1dlx12SS、01d0dddlFx11212dlxSS120max012122()(4)()ddpS SFFSSSS0max1d()0ddFSS123SS0max002()959ddpdpdpFFFF1S111112122dlxSSdlr三相交流电磁铁的吸力1o2o3sinsin(120)sin(120)mmmttt 123233dF2dF1dF1132ABoo12333 cos2cos(2240)cos(2240)22dmdddddmFFFFFtttF202mdmFSdF321dddFFF)(2 tdF)(1 tdF)(3 tdFt23 20