电拖课后习题

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P802.4
ᵯPN=30kW,UN=220YIN=158.5A,nN=1000r/min,Ra=0.1Q,TL=0.8TN1ᨵᱯឋḄ᝱2ᵯᐭ0.3QḄᵯᵯḄ3ᵯ᜜"ᵯ#$%180VᵯḄ4&'()ᑮজ=0.8জNᵯḄ,1:=UN—INR«=220-158.5x0.1=஺eজNQ2Q4V஻N1000TN=C0IN=9.55C>Z=9.55x0.204x158.5=309^V-mWW.*.7=0.87=0.8x309=247.2N•n—UNRa
2200.1x247.2=1016"minGজNC஺জ%0.2049.55x0.20422ᵯᐭ0.3QḄᵯᵯḄ?n=.Ua——♦_+%iI=0.81NCeজN=0.204n=-°^^3X0.8X158.5=830"min3ᵯ᜜"ᵯ#$%180VᵯḄUR1800.1Q__..n=-----------------I=------------------x0.8xl158Q.5=8O2O0N77minC@NC@N0.2040.2044&'()ᑮজ=0.8জNᵯḄ=0.876=0.8%Gজ//=O.8C0/1L=1N>7V1V.lL_A_y_2200.1••flxl58.5=1250r/minCQNL0.8x0.2040.8x0.204P802.5
ᵯPN=29kW,UN=440V,IN=76A,nN=1000r/min,Ra=0.065RN,.ᵨ$#0)&123451⌕ᨬ8ᳮ:;<%250r/min,ᨬ=ᳮ:;<%1500r/min,>?Ḅᨬ=@ᨬ8ABCᨬ=ᱯឋ@ᨬ8ᱯឋḄD᳛@☟G᳛஺,D
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1u440R,=0.065%=0.065■=0.065x——=0.3763QI76NcজJU1NR0=440-76x03763=0KL஻N1000%440n0=———------=1070r/mina஺জ0.4114T=9.55"4=9.55x0.4114x76=298.6N•"N1)&'()T=TNU>CQI=C*NINWiV'u>*:,Ἤ/0᨟/:ߟ.""஻0UNA3MᔆOO0.37631O/ᔆ//?=1500--------x106.54cd>e>r.஻N=1363.4/7min1070GQ=1500256(::.n=250—70=180"minN3)nmax,ᓽ&'()R.0.376B==0.4577a9.55(C,জ>9.55(0.2933)2cAH1500-1363.4o=-----=9.1%஻0max1500nmin,ᓽ56(:R_0.376a6=BN=0.2339.55(C@,V)2-9.55(0.2933)2A/i70o=------28.2%஻0min250

2P802.8?:|1ᵯABCD᝱(FGHᵯAḄCeজN|?UN-INR«J220—158X0.069CeজN.~n-1000NU220ᳮLMNOP%=m=—L=1052/7minGজN0.2091QRᵯ'OST=9.55(3=9.55X0.2091X158=305.5N•TNUVWXᓣZᱥFᡠ]ᵯBCᙠᵯAD᝱T,=0.87=0.8x315.5=252.4N•T0.069+&600=1052-x252.49.55x(0.2091)2R=0.6787Qsa2ᵯA]600r/min_`Zᱥ(.......aᔜcᑴAD᝱_ᵯefghiᐭḄᵯklmᡠ◤_`PopqᳮLMNOPFᦑs]ᵨuὑᑴAᡈὅOP,ᔣ,zᑴA{|_`}Zᱥ஺aᵨuὑᑴA{|_`(FᵯefghiᵯkV0.2091x600R-0.069=0.9236Q0.8/w'0.8x158bᵨOP,ᔣ,zᑴA{|_`(FᵯefghiᵯkV(஻0)C@,V(1052+600)x0.2091R-0.069=2.663Q0.870.8x158w3ᵯA]1200r/min_`Zᱥ(...........aᵯefghiᐭḄᵯkl?ᡠ◤_`PoᜧqᳮLMNOPFᦑhᵨ,ᔣf✄ᑴA{|ᵯefgiᵯk(Ḅᱯឋ{VUN&+R*ar_„R“+᪷⚪Fn=—1200r/min,n0=-1052r/min,T=T=315.5N•ᐭ,N0.069+R”,-1200-1052-X1580.2091a?ᑮᵯefghiᵯkVR=0.1267Qsa

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5(2)D,y1P1825.4UVWXᵯTYZᦔᵯ,:1.,n=1455r/min,ᵯḄQROPqzOPNᑣs¡OP஽=1500"min.ᑣ2P=4]5ḄG᳛%1500-1455=0.031500(1).ᵨTYZᦔᵯ^_:`ᵯᢙ=£+¥=ᘤ+஻2=35.25/6.84஺&ᢙ

6Z=R+jX=8.5+J83.1=83.53/84.16஺mmmT¦§ᦔᵯg©ᐭª«kᢙ77Z=+—=32.43/30.44°1zF”+TZa2ᑣFR®ᵯ¯•___380/0஺1—2-32.43/30.44஺=11.72/-30.44%R®°z|F±R®ᵯ¯ᨵᦔl5=ᒹ=6X11.72=20.24´᳛U¶cos%=cos30.44°=0.862R®©ᐭ´᳛Pi=3U/cos/=3x380x11.72x0.862=H.519%wᦔ᳛7=^-xl00%=—^-xl00%=86.96%R11.519200w·ᵯA´᳛¯?:cr.”imi60/.60x50..•/2¸=4ᑣ%=——=------=1500"minP2᪷´᳛¯FᵯᙠQRBC(ᨵ]“=6+P+]10x103+200+70=10270Wud]“=2/º=310+10270=10580^

7,•V“.=(If)½ᓽ]c=10270=(1—5/)஻=(1-5^)X10580ᑮ%=0.0293(1)ᑣsQROPV)n=(l-s)/?I=(1-0.0293)x1500=1456r/minNN(2)MNOSV)Á=Â=9550P"'ec+P(,d=955(/70+200)x10'=171N-mQ.n1456vN(3)©*OSV)T,=Ç=9550È=9550-^-=65.6%T'Q.v1456(4)ᵯ'OSV)T=4+”=65.6+1.77=67.4N•ᵨNppincoᡈὅ7=*=9550q=9550F2^=67AN-mNQ1%1500ᡈὅT=ᓃ"=9550J+P"M=955010+0-27=67.47V-mᐭQ,v஻I1456P2206.2?)(1)ᵫᵯÌÍÎᦪs¡QRBC(ḄOÕ᳛V஻1஻N750-720…ÐM=—T=2.4s*=-——-=------------=0.041N,Û750ÜsN,AMÝᐭT=9550È=9550Ñ=994.8NMNn720s,“=s*(4+NT=AT=2.4x994.8=2387.52N,Ts,“=0.04(2.4+J2.42-I)=0.1823MMNÓÈᨬᜧOSTm(ḄOÕ᳛sm
Sm=S,v(4+“JP2216.8■—,1Lt»•ஹ*I-«->..ஹ..ஹà^************************************-n=720"min,᪷QROPqz************************************NOPFs஻τ=750”min