电工学电工技术第七版上册秦曾煌课后答案1-7章.pdf

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uc + - 10V 1mA t t C C CC eeu u uu 10 1 . 0 6-3 155)5(10(5 0.1S101010 201010 2010)10 3) V51020 101020 10 )( )2( V1010201)0()0( ) 1 ( 2 200) 200) 110 0 ) ) 0 01010 ( ( 3 )5( 5( 1010 20 0 2020 0 5( 5( 101 20 02020 3.6.4 A R U ii LL 5 .0 30 15 )0()0( 2 0)( L i S RRR RRR LRL1 . 0 )( / 321 321 0 t t LLLL eeiiiti 10 5 . 0)()0()()( t t L L e d tdi Ltu 10 10 )( )( tL e R tu ti 10 3 3 333. 0 )( )( t L etititi 10 32 167. 0)()()( L L 0( (iLi iL t t d d )0 )i i )( ) t 4 A P157 4.4.1 (2)4.1.2 34.2.1 24.4.21 4.2.314.3.114.3.234.3.33 4.4.124.4.234.4.324.4.41 4.4.534.5.1244.5.21 4.5.324.7.134.7.23 P159 90 45 U 1 I 2 I A25A10V220 21 IIU AI Ati AI Ati VU tVu 4525 )45sin(102 9010 )90sin(210 0220 sin2220 2 1 1 V0 2 A10A10A10A10 2220 2 2222 4.2.5 AjIVeU j 34220 30 AjI34 Ati AjI Ati AjI Vtu )8 .36sin(25 8 .36534 )143sin(25 143534 )30sin(2220 j j sin(2sin(2 53 3j j in 5353j j j j sin25si2 53 3j j V V 14(14t t 14314 )30 )0 V V 5353j j t 4.5.4A0V0 a b 1 I 2 I0 I R C A1 10A A2 10A A0 i1 i2 i0 AI2101010 22 0 RXL V1 60V V0 V2 100V +- v1 +- v0 +- v2 1 V 0 V 2 V VV8060100 22 0 1010 2 2 0 01010 0 021010 2 2 V V2 2 c d XL XC A1 5A A2 3A A0 i1 i2 i0 1 I 2 I 0 I 1 V 0 V 2 V VV2101010 22 0 R Xc V1 10V V2 10V V0 +- v1 +- v2 +- v0 0 0 V V0 0 V V2 2 e 5 - jXc V1 100V V0 A B u1+ - u2 + - u j5 - j10 A1 10A A0 i1 i2 i + - + - u4 V210 10 210100100 100101010 45 sin 10 45sin 10 10 2 2 210102)210(1045cos2 10 210 25 100 55 100 00 222 4 2 4 22 21 2 2 2 1 1 22 2 VAA AUUU VIU AIIIII AI I AB 2 I 1 U 2 U 1 I I 4 U U 45 AB U 210 210 45cos45cos 2 4.5.7 I1=I2=10AU=100Vu i 25 210 100 210 10 2100 210 10 2100 10045tan 2100 2 2 100 45cos 2101010 1 2 1 1 222 2 2 1 I U X I U R I U X VUU V U U AIII L AB AB C AB R - jXc A B + - u i1 i2 i + - u1 jXL AB U 2 I 1 I I 1 U U 45 4cos4cos 1 1 UUUU1 145tan45tan 2 2 100100 U U X U C C 4.8.140W 220V f50Hz 110V 0.8, 5 .302 40 1102 R 190.5V110-220 22 U AI364 . 0 110 40 H X LX L L 67 . 1 314 4 .523 4 .523 364 . 0 5 .190 5 . 0 4 .5235 .302 5 .302 cos 2222 L XR R F U P C58 . 2 220314 )9 .36tan60(tan40)tan(tan 9 .36 8 . 0cos 60 5 . 0cos 22 21 22 11 110-220110-0 222 110110- 3 . 0 5 .190 5 .190.19090 190.5V190. 4 .523.523 64 4 .523 4 .523 2 2 R 5 A P181 5.2.1 (3), 5.2.2 (3), 5.2.3 (3), 5.2.4 (3), 5.3.1(3), 5.4.1 (2) B P182 5.2.5Ul380VY R1=11 N N L1 R1 R2 R3 N N L2 L3 1 I 2 I 3 I N I AIIII A R U I A R U I A R U I VU VU VU VUUUU VU N p l 101201012010020 12010 22 120220 12010 22 120220 020 11 0220 120220 120220 0220 220 380 321 3 3 3 2 2 2 1 1 1 3 2 1 321 V V VUp pU 0 220220VU 2 3 VUUU VUUU VUUU V RRR R U R U R U U NN NN NN NN 131252055120220 131252055120220 01650550220 055 22 1 22 1 11 1 22 120220 22 120220 11 0220 111 3 3 2 2 1 1 321 3 3 2 2 1 1 VUU VUU VU 150380 150380 0 31 3 21 2 1 1 U 2 U 3 U 1 I 2 I 3 I N I 1 U 2 U 3 U 1 I 2 I 3 I 2 U 3 U AIII A R U I A R U I 3015027.1715027.17 15027.17 22 150380 15027.17 22 150380 321 3 3 3 2 2 2 551205512 55120520 16501 50 11 5512055120 0551205520 16501650V 13252 152 125252 22 22 1252 1252 1 25252 0 4 5 5.3.2380V I VRIU VRIU A RR U II.11 305 .12611305 .11 305 .11 33 30380 22 2 11 1 21 12 21 L1 L2 L3 10 38 1 I 1Y I 1 I AI A U I A U I VU VU Y 32.3931022 0310303 38 30380 303 38 022 10 0220 10 30380 0220 12 1 1 1 12 1 L2L2 L3L3 020 00 6 A P212 6.1.1 (2), 6.1.2 (1), 6.2.1 (3)11(3) 6.2.2 (2).6.2.3 (1), 6.2.4 (3), 6.2.5 (2), 6.2.6(2) 6.3.1 (3), 6.3.2 (3) B P213 6.2.8f50Hz m 2.2510 3Wb, 200 6.2.9U=100V f50HzI1=5Acos 1 0.7 I2=10Acos 2 0.05 VfNU m 9 . 991025 . 2 2005044 . 4 44 . 4 3 WPUIP WRIP R RRIP WUIP CuFe Cu Cu Cu 5 .3375 .123505 .127 . 05100cos 5 .125 . 05 5 . 0 10 5005. 010100cos 111 22 11 22 22 222 44.4444.44 200 2505025050 6.3.310kVA 3300/220V60W220V 6.3.8RL=8 N1=300N2=100 E=6V ,R0=100 AI AI n 03 . 3 3300 10000 45.45 220 10000 166 67.166 60 10000 1 2 mWR N N R N N R E P L L 6 . 878) 100 300 () 8) 100 300 (100 6 ()() )( ( 22 2 2 2 12 2 2 1 0 03 . 3 0 . 3 33003300 4 . 8 =300300 A A3 6.3.11550 220V36V 36W12V24W 30550 220 12 90550 220 36 273. 0 220 2436 3 2 1 N N AI 1212 5 220220 555 555 220220 5 95090 5 50 0 7 A P255 7.2.137.2.2 (1), 7.2.3 (1), 7.2.4 (2) 7.3.1 (2), 7.3.2 (2)17.4.1(2)(1), 7.4.2 (2)(1), 7.4.3 (1) (2), 7.4.4 (2)(1), 7.4.5 (1)(2), 7.4.6 (3), 7.4.7(2), 7.5.1 (3), 7.5.2 (3), 7.5.3 (1), 7.8.1 (3), 7.8.2 (2), 7.8.3 (3) B P257 7.4.8 Y100Ll4 2.2kW 380 V 1420 rmin cos =0.82 =81 (1) (2) 50 Hz (1) U P U P I NNN N NN N 03803 220 cos3cos3 1 Ll4 4 kW kW 257 257 kW 380 kW 380 min cosmin cos ( IpNIN5.03A mN n P T N N N 8 .14 1420 2 . 2 95509550 2sN(nl- nN)/n1 p2n11500 rmin sN=(1500- 1420)/15000.053 f2sNf10.053X502.67 Hz 7.4.9 1470 rmin50Hz(a) (b)2/3(c) 0.02 (1) (2) (3) (n2=60f2/pSn0)(4) (5) (a)(1)1500 rmin(2)1500 r 2.67 67 02 min (3)1500 rmin (4)1500 rmin (5)0 (b)n1 5002/31000 rmin(1)1500 r min (2)500rmin (3)500 rmin (4)1500 rmin(5)0 (c)s0.02n1470 rmin(1)1500 r min(2)30 rmin(3)30 rmin(4)l500 r min(5)0 7.4.11 Y132S- - 4 Ist IN Tst TN Tmax TN 5.5 kW 1440r/min 380 V 85.50.84 7 2.2 2.2 50 Hz sNINTN Ist,TstTmax Y132S- 4p2 n11500 rmin sN=(n1- nN)/n1=(1500- 1440)/1500=0.04 A U P U P I NNN N NN N 64.11 85