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1、要求：1.掌握2.图640 按恒seddTrrrrmaxsllLRLRr2mmmaxe2lLKTrrmaxssmlLR1gE11gs1ssgs1sss)()(ELjRIELjRIUll（6-65)1gE1sU1gE1OsUUs/1=Const.Eg/1=Const.定子电流增大的趋势图6-41不同定子电流时恒控制所需的电压-频率特性 1gEsUsIFBS电压型逆变器PWMM3 ASRs11saUsbUscU图6-42 转差频率控制的转速闭环变压变频调速系统结构原理图 s1*1*ssUsU1s1图6-43 结构异步电动机的多变量、强耦合模型 图644 三相异步电动机的物理模型tRiuddAsAA
2、tRiuddBsBBtRiuddCsCCtRiuddaraatRiuddbrbbtRiuddcrcc cbaCBAcbaCBArrrssscbaCBA000000000000000000000000000000piiiiiiRRRRRRuuuuuucbaCBAcCcbcacCcBcAbcbbbabCbBbAacabaaaCaBaACcCbCaCCCBCABcBbBaBCBBBAAcAbAaACABAAcbaCBAiiiiiiLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLmsmsms21)120cos(120cosLLLmsACCBBACABCAB21LLLLLLLms
3、accbbacabcab21LLLLLLLcosmscCCcbBBbaAAaLLLLLLL)120cos(msbCCbaBBacAAcLLLLLLL)120cos(msaCCacBBcbAAbLLLLLLLrsrrrssrssrsiiLLLLTCBAsTcbarCBAiiisiTiiicbarismsmsmsmssmsmsmssms212121212121llmslLLLLLLLLLLLLssLrmsmsmsmsrmsmsmsmsrms212121212121lllLLLLLLLLLLLLrrLcos)120cos()120cos()120cos(cos)120cos()120cos()120
4、cos(cosmsLTsrrsLLiLiLRiiLiLRiLiRiudddddddd)(tttpdtdiLiddLLiiiTTWW2121mmmmWpmn/.constmp.constmmeiiWnWTiLLiiLi002121rssrppeTTnnT（6-83）cbaCBArsiiiiiiTTTiiirsrssrsrpe21iLiiLiTTnT)120sin()()120sin()(sin)(bCaBcAaCcBbAcCbBaAmspeiiiiiiiiiiiiiiiiiiLnTtnJTTddpLet dd(R+Lp)-1L1()2()1eruiTeTL npJp(R+Lp)-1L1()2()1eruiTeTL npJpnpJp图645 异步电动机的多变量非线性动态结构框图
电力拖动自动控制系统第二十九讲
