電工電子學(xué)課后習(xí)題答案

1、電工電子學(xué)課后習(xí)題答案電工電子學(xué)課后習(xí)題答案目錄電工電子學(xué)課后習(xí)題答案2第一章電路的基本概念、定律與分析方法3練習(xí)與思考3習(xí)題5第二章正弦交流電16課后習(xí)題16第三章電路的暫態(tài)分析35第四章常用半導(dǎo)體器件48第五章基本放大電路51第六章集成運算放大器及其應(yīng)用54第七章數(shù)字集成電路及其應(yīng)用.63第八章Multisim簡介及其應(yīng)用.75第九章波形的產(chǎn)牛與變換75第十章數(shù)據(jù)采集系統(tǒng)77第H一章直流穩(wěn)壓電源79第十二章變壓器與電動機82第十三章電氣捽制技術(shù)91第十四章電力電子技術(shù)96第一章電路的基本概念、定律與分析方法練習(xí)與思考1.4.2 (b)+36V142V6Q6V1.4.2(c)i n a6A-

2、.5Q 2A _1.4.3 (a)Uab 5 5 2 1VRb5ab1.4.3(b)UabRab66642V3 61.4.3(c)5Q40VUab Ur 10 6 510 40/3QVUs1 4Rab51.4.3(d)Us2KVL:21uab32uabusVRab1.4.4(2)4415VbR45VbRiKCL：1234VVbMR3RR2R4求方程中Vb2KCLV=7R2-50k,_V=Vb950k100kVb+9_Vb+91=R1100kVb1VKVL:650KI+100KI9=01100KI=15I=A10k1Vb=650k=1V10k習(xí)題1.1(a)x5427A(b)x10.40.70.

3、3A(C)0.2 30x4x30.20.10.3Ax2x10.30.60.9A1.23 0.010.30.31A4 9.610.319.3A60.39.39.6A1.3P14228發(fā)出功率P211010吸收功率P3428吸收功率P4(110)10吸收功率嗪=28嗪二限聯(lián)=281.66小R120Q50mv(a)uR6V(b)uR12604V601201.7(a) us144V(b)Is 2A5 us 2 2 0 us 9V1.8Us1221014VIs21021A1021428P210101.9I10.45A0.3AI3Rx0.450.30.15AU123I36.34小168Q0.15Ry106

4、.346.3174.4Q0.451.10(a)：U2U116V(b)：16(c)：U21.645551.6V4550.16V(d)：U20.164550.016V1.11U21UiR2RpRR2Rp8.41VU22U1二RR2R2Rp5.64V1.12%63RBD=0.5QRad1990.5Q0.5199.0,“1*I1105mA125mA2,3-Is54.2mA3.60.6I450.8mAI2I33.6uAD10199.51.995mVuBD=15=5mVPS101.9950.019951.13(a)R6V1.5V(b)BA1.153Q1.5Q3Q-I+13Q1.561.531A1.162Q

5、I33QI 3I11A0101010532Is1I311I0202AI2121AI41a31.1722QT2Q2V+CII 2Q二kD,82仆I1A2221.18I11213KVL:U1I1RI3R30I3R3I2R2U20675I主3 75I”1751.19I118KVL:I3140I220II1I34AI26I216I20010AI312AU1U220I180V6I260V電壓源P電流源P14046018560108發(fā)出功率發(fā)出功率1.20IiI2+I0IKVL:0.8Ii1201160.4I200.4I21164I20I18.75AI29.375AI328.125A120V:P1209.

6、3751125116V:P120160.75101510A:P10428.1251175RL:PI2R28.125243078.1251.21I1 0.5 I21 V23-1.22UsI21IsUs0.1AR2R44020I20.10.10.2AI22IsR40.3200.1AR2R440201.23Is1 Q11 3110.25A1 10.5 0.5 11 Q11I3220.5A0.50.512I30.250.50.75A1.24KCL:I1I2I30KVL1:2I11301202I20KVL2:2I21204I30I115A,I210A,I325A(b)開關(guān)合在b點時，求出20V電壓源單獨

7、作用時的各支路電流：一ii2QJLI32Q,4Qb+20VIiI 2I 32042 2 4 4 24A2 2 42022 2 4 4 22A所以開關(guān)在b點時，各支路電流為I115411AI210616AI325227A1.25(b)等效變換Uab (3 2.5) 2 11V(c)等效變換Uab(42)1.59V1.26戴維寧:ua1220110V225QIl110春22A15諾頓:I ab2205025QIl22255 25 50HA1.28(1)求二端網(wǎng)絡(luò)的開路電壓:R2aa2A2AJI)+c_U10VUab104I10242VUab104I(2)求二端網(wǎng)絡(luò)的等效內(nèi)阻開路)RabR24(3)

8、得到戴維南等效電路+KJI1Uab2A0,154ARabR131.32(a)I112I350Va50VaVaI1/cI2_I3cc1052050Va50VaVa10520100Va7V10242V（電壓源短路、電流源2.3.2(a)取電源為參考向量UIR?U2I(jXc).ccIRRtan60IXcXcR一2 fcXC萬C=2fcR=,3(b)第二章課后習(xí)題2.3.2(a)取電源為參考向量U2I(jXc)?UrIRIRtan603IXc、，RXL,又XL=2fL.3-R-=,52fL正弦交流電UIR?U2I(jXc)?IRRtIuUtan603URIXCXc60、U?1Xc卷,又Xc=AU22

9、fcR=、3(b)UrU2XlIR-tan603IXCR13,又XL=2fL-=32fL習(xí)題2.2I15j5,I152Ai110sin(1000t45)AI15.245A?I25j55.245Ai210sin(1000t45)A?_I35j55.2135Ai310sin(1000t135)A?_I45j55.2135Ai410sin(1000t135)A2.3(1)U1630VU2630V，8廣。arctan=536?U=Ui+U2=10Vu10、5sin(t)V6030I11030AI21060Aarctan1=45I10、2(4530)10.275Ai20sin(t75)A2.4(a)以電

10、流I為參考向量10U10.2V14.1V?_U10245V(b)以電流I為參考向量222UUcUrUc100260280Vu,2usin(t)ii2isin(t90)Ai2%2l2Sin(t45)A(c)以電流I為參考方向Uc?U(200100)9010090VU100V(d)以電壓U為參考方向RUIlr2Il2 5242 3A(e)以電壓U為參考方向Ic，I/?UIRI52525.2A7.07A(f)以電壓U為參考方向UII IlIlIcI CIc I18A2.5(1)7、,2sin(t)AIlXlA,31.4314rad / sIc j一一一 3314 100V219.8sin( t)V3

11、09.9Ul310(2)309.9UlIL310Ul Lsin( t127314 100)VXl2.6(1)Uc2200 V Uc 220V2 3.1406 796.2IcUcXc220796.20.28AIc0.28ic0.39sin(t)A(2)Uc0.1796.279.62.9(1)u220/2sin(t)V)A22 011 11.3j60.7mHU2200V2f314rad/si10,2sin(t?I100A?7U2200Z?I100LXl113250(3)SUI22010220CV?APUIcos22010cos6001100Wsin2200sin6001905var2.#R+U2U

12、iC一電容兩端f=HZ以Ii為參考向量0=-601Rcos2k-1K2,3Xcsin2k)1707c2711Xcc0.1uFcXcc(2)電阻兩端10.16uFUr?U1U2I1IT*-730。XV?U0=-300Rcos=2k一=17072一/1、Xc二一sin=-2K()=10002.13r+R工？LUC10VRLCZ=R+(XlXc)jUUVU100200Vu1002sin(1000t200)iR-R3000.47sin(1000t200)Xl?IliLL10000.4?U100200jXL4009004000.250.35sin(1000t700)A0AXc?Ic500jXC10002

13、101002005009000.200Aic0.28sin(1000t1100)A1RjXL1/：3001jXc14000.0030.0005j9050)0.003901003000.330A2.14?以u為參考向量IlXc1CXlIlIi10AU10RV10R10AXc10450A10、,2A2.15(1)jXc303040j10002510650530UrisR3002sin(1000t-300)Is10300AUcIs(400jXc)101200V3004000304090Uc400*2sin(1000t1200)V(2)u(3)IsZ103005002sin(1000t50530830

14、)V500830VPURIS300103000WRSQ QcUcIS 400 104000VarSUIS500105000V?APScos(-530)=3009WQSsin(-530)=-3993Var2.18R8-24Ur I UlI3100.3HUlUc8(12Uc)jUc(12Uc)21026V或18VXc匹1.5或I1=xC1-CC0.067F或一101.5101=0.022F4.52.19(a)(1)Zj3j6_Z1j3j6(2)j1j43j5182j9j2j370Uioo0Z53702370AU1237048370VU2237049008530V?U3237019002530V?U

15、42370290041270VIi?I2U4 73?U4764 12703 9004 12706 900P UI cos1.33 370 A0.67 370A10 2 cos( 370) 16W(b) (1)7( j4)( j6)24Z1j3 j610jj 2j 2.4j 4 3j 5 3702.4j?I,UZ?U1210 005 370370A3704 900 2370VU22?U32?U42370 4 8370V370900 4 530V370 2.4900 4.81270VU44j ?U44.812709001.24.8127069000.8370A370APUIcos102cos(37

16、0)16W2.20Z255j5v2(55j)j(5-5j)10j45010IiU2100=10AZ210A讀數(shù)為10AZ=10+10j10.2450U1I1Zv2V1讀數(shù)為141.4V100,2V2.23CC104102106Z1(j)j211(j)1j244XlL1041041Z1jZ11.50.5j0451.2j2.24Ucj2Uc10029001000.50AIIcIr0.5URIR(10.5j)22+j?UlIj2(10.5j)j22j10.5jA1.1V11+2jV0AUUrUlUc2j12j10PUIcos3.611.1cos(23j03.61W2.29P1.21K一PUIcos1

17、,cos1=0.511UI11220160,224.50P.、CT(tan1-tan)U_1.21K(1.7320.456)2IEUr23.14|5022021K4.54A2201022uFSUI3804.541727.3V?ASsin177.3(一)=-Var2.30ZrlL 1212.56j 17.37Ii12222012.6712.562Zc50 100 10 631.58IcZc22031.856.91AZrlZcZrlZc25.15220Z 總 25.15=8.75AUI cos =220cos0=1864.5wUI cos =220sin0=478.73wS=UI=220.75=1

18、925V?Acos0.96862.31Up3803220VIl2.2AUp2201002.2arccos0.83701003708060j2.32(1)Z86j10370Ul380220VIlUP22010IP22A22AUl220VUpUl220VUp2207022AIL31P38AUl380VUpUl380VUp3801038AIL,3Ip66AUn220V,UlUl380V,Y行22CV,形2.33A?INN.?IBBXcC?,ICUl38CVUp220V設(shè)Ua22000VUb22000V?UC22000V22000102200AUbR?UcR?IA220001000220001000I

19、BIB2222002200A00220060.100A_2_2_PIAR22104840W2.34Z3122j38Ul380V,Up220VIlU2205.8AZ.3ulIl38coscos35.603054W,3ULlLSin0一sin35.6=2290VarS,3UlIl3817V?Acos0.82.35Ul380V,RA11RbRC22設(shè)Ua22000VU22000VUc22000VUA22000RA112200AUbRb2200001000A22IaIbIb2200100010001000AARAIARBICRC222111028800WIABUAB3-22000ICARb2217.3

20、00AUCARcIABICAIAB3220220017.310x30017.310300AIca17.30017.300A003000AIn0,Ia0UBCRbRc3-2202222008.600AIc8.600A2.36Il5.5AP7760Wcos/3ILcos-60=1018.3V、3S3UlIl31018.35,59700V?AUl1018.33320.7Z320.7370256.6192.42.37IL32.9A19A122 162380VIl32.9Ip13二3UpIpULUP380V2.38Ul380V設(shè)UA=22000V00 A22000”2210I ABU ABR3 2200

21、01000 A38000010 3 00 A220010.30039.300A39.3A第三章電路的暫態(tài)分析3.1100VI+ic0Uc(0)U100V0uc(0)uc(0)U100VUR2(0)100Vi2(0 )100100A1.01AR299UR1(0UUR2(0)1001000V“0%0AR1ic(0)i1i21.01AicR2-2Uc+cii()i2()U100RR21991AUri()ii()Ri1V叱()i2()R299Vic()0AUc()Ur2()99V3.2(1)換路前：tR34R3 R4 2K旦341K%34RR2342KiL(0)1.5uA2Kuc(0)iLR41.5u

22、A1K1.5V(2)換路后t0iL(0)iL(0)1.5mAuc(0)uc(0)1.5V+6V一615一i1(0)61.52.25mA1K1Ki2(0)0Aic(0)i1(0)iL(0)2.25mA1.5mA0.75mAUl(0)1.51R1.51.5mA1K0Vti色L11I+、1K1KA6V1K|R41Uc2V3iL2mA3K11 iL2mA12Ul3.3(1)求uc()t0uc(0)0Vt0uc(0)uc(0)0V(2)求取)tuc()U20V(3)求R26KCiC2ZZ2乙Z2C1C22jc2cljc)20uFRC6K60.12sUc(t)20(020)et0128.33t.0.122

23、020eVucVc203.4 t0uc(0)10m6k60Vuc(0)Uc(0)60VR210mA3K6K3KQI6KQ5KR3KQUc3K6Kic(0 )6060%、5K12mA10mAj3KQX6KQR3ic()0uc()0R21I R3KQH13KQ6KQR3R05KRC5K2106102stUc(t)Uc()Uc(0)Uc()e2t0600e1P60e100t(V)tic(t)012mA0e12e100t(mA)UcV60r-0-s-123.5(1)求l(0),uc()t 0 Uc(0 ) U 100RE50Vt0Uc(0)Uc(0)50Vic(0 )U 50R R100 504 46

24、.25A(2)求出)Uc()t,ic( ) 0A,Uc( ) U 100V求%RRiR28RC2106sic(t)(6.256.25e5105tAUc(t)100(50100)e2101005105350eV3.6R1R35Vuc(0)uc(0)5VcU2iRi2R2LR35 i200ic(0)0.625mAi(0)0.3125mAR2RR2R2R32K2K4KUc(ic(RC4K1001060.4si()R2R22.5VU2RR20.625mA4K4KUc(t)2.52.5t(52.5)e042.5e0.5tVic(t)0(0.6250)e0.5tV2.5temAi(t)0.625(0.31

25、250.6250.3125e0.625)e2.5tmA2.5t3.7uc(0)0tRC50KUc(106tU20V0.2sUc(t)0.10.120(020)ea22020e5tV(t0.1s)Uc(0.1)Uc(0.1)2020e50.17.87V7.87VuR(0.1)Uuc(0.1)207.8712.13VtUr()0R以25KtUr()026R0C25K41060.1st0.1%(t)0(12.130)e12.13e10t1V(t0.1)tUc(t)U20V%(t)UUc(t)12.13610t1V(t0.1)t0.1uc(t)20(7.8720)e丁V3.8t0.2,RC110310

26、1060.01suc(0.2)ui(0.2)10Vt0.2,Uc(0.2)Ui(0.2)10Vu0(0.2)ui(0.2)uc(0.2)01010Vt,U0()0Vt0.2u0(t)0(100)e由10e100(t0.2)V,t0.2t0U(0)Ui(0)0Vt04(0)Ui(0)0Vu(0)Ui(0)10Vt,u0()0Vtu0(t)0(100)e麗10e100tV,0t0.2U0V10丁2+c0ts/-103.9求Uc(0),Vb(0),Va(0)0(6)t0,Uc(0)51V525t0,Uc(0)Uc(0)1VKVL:10i(0)125i(0)660i(0)0.31mAVb(0)6100

27、.312.9VVa(0)Vb(0)11.9V求人(),Vb(),Va()Uc()Vb()Va()6(6)()50.351.5V105256100.33VVb()Uc()31.51.5VR5(1025)4.375K_12_7RC4.375100104.37510stuc(t)1.5(11.5)e4.3751071.50.5e2.3106VVA(t)1.5(1.91.5)e2.3106t1.50.4e2.3VB(t)3(2.93)e2.3106t30.伯2.31h3.10求iL(0)t01l(0)RR35150.2At0,iL(0)iL(0)0.2Ati()iL()RRJlRRI1018.75Ri

28、2R2UR2R3457.50.32A0.16A153.750.52ms18.75iL0.16(0.20.16)et0.531030.160.04e1875tA3.11Z2LLiL2jL10.01jL20.02L1L2)0.03H求i1(0),i2(0t0,iL(0)0At0,iL(0)L斷開：i1(0求M),i2(iL(0)0At,i1()R2Mt)Mt)尸i2(0)=0Ai2()(02)e100t人2eARiLRt0.01R20.0332A210.01s100tA22eA(2)Li：i(to)2Aii(to)i(to)2Aii()LiU6R20.013A0.005sii(t)3t(23)e0005200t/AL2：i2(to)2Ai2(to)i2(to)2Ai2()L20A0.020.02si2(t)0(22e50t/A3.12求i(0),i(0)RlRc22010A1201i(0)i(010A求乂),ti()URRl22011110ALRRl0.2110.1si(t)110i(t)30A,t(10t110)e0.10.02s11010t/100eA3.13100t0,i(0)2.5A40t0,i(0)i(0)2.5Au(0 )2.5RV u(0 )