cơ sở kỹ thuật điện,dhbkhcm Chương 6 6 19 mnT jEar Ia e 14330 605 1 )5 17sin( 3 3300 41 23573 5 1741 2357 3 3300 84 2586 5245 1 84 2586 52484 25 33300 33000000 6 20 a)[.]
Chương 6.19 3000000 25.84 524.86 25.84 3300 3300 Ear 1.5 j 524.86 25.84 2357.4117.5 3300 2357.41 sin(17.5) e T 14330n m 1.5 60 ng 6.20 a) c om Ia co m 40 900000 225.92 2300 2300 Ear, m j 225.92 1402 18.8 2300 1402 sin(18.8) e T 7161.61n m 40 b) u I l 200 45 du o ng th an Im cu Ia 200 45 225.92 393.6 21 PF 0.93lagging 2300 P jQ 39321 1463383 563382 j 6.21a) Ear Va sin 250000 1.2 sin 0.685 550 Xs ) 460 3 ( 43.2 250000 Te 1326.29 60 Pt b) CuuDuongThanCong.com https://fb.com/tailieudientucntt 46043.2 (550 ) 262.83 3.23 1.2 j PF 0.998lagging Ia 550 262.83 sin(3.23) 14107VAr 2300 Ear 1.6 j 369.86 j 1919.68 6.11 a) Ta có điên áp pha Q 230 132.79(V ) 25000 Ia 62.76( A) 132.79 Ia 62.76 arccos 0.8 62.76 36.87 A c om Va Ear j Xs Ia Va 1.5 j 62.76 36.87 132.790 203.721.7V co an th ng Ear, new Ear , old Ir , new Ir , old Ear, old Ear, new Ir , new Ir , old mà Ir , new 1.2 Ir , old Ear, new 203.7 1.2 244.44V ng b) 6.12 a) cu u du o imf ( Ear, new) imf ( Ear, old ) 203.7 sin(21.7) new arcsin 17.946 244.44 244.4417.946 132.79 Ia, new 83.33 52.95 A 1.5 j CuuDuongThanCong.com https://fb.com/tailieudientucntt 2000 1154.7V 900000 300000W P1 pha 300000 Ia 288.68 A 1154.7 0.9 Ia 288.68 25.84 Va 400 115.47 A 23 I l Ia Im 288.68 25.84 115.47 191.49 41.08 A c om Im b) 120 60 p Ns 1800 Ns 120 1800 60 ( mech) m 60 2000 Ear, m 10 j 115.47 1633 45 Ear Va sin(45) 2122 Te 10 60 an co ng f th c) du o ng cos 300000 Ia 259.81 1154.7 Im Ia I l 259.81 191.49 41.08 170.7847.46 Ear, m 1154.7 10 j 170.7847.16 2675 25.57 2600000 arccos 0.87 750.18 29.54 A 2300 0.87 cu Il u 6.14 a) b) Im 750.18 sin(29.54) j 369.86 j ( A) Ia 750.18 cos(29.54) 652.67 A c) Ear 2300 1.6 j 369.86 j 1919.68 6.15 CuuDuongThanCong.com https://fb.com/tailieudientucntt a) 45000 36.87 156.13 36.87 A 208 0.8 208 0.6 j 156.13 36.87 A 98.47 49.5V Ear Im b) p Ns 120 60 Ns 900 120 900 m 30 ( mech) 60 Te max Pt max, pt max Ear.sin( ) max, tức imf( 0.6 j Im )max, => Im có phần thực, c om f điếu xảy PF=1 45000 124.9 208 208 Ear 0.6 j 124.9 141.55 31.96 Ear Va sin(31.96) Te 477.3 0.6 30 th an co ng Im ng 6.17 a) 120 60 p Ns 1200 Ns 120 1200 40 (mech) m 60 87000 3000 716.2 T e total 40 87000 692.3 T e ml 40 cu u du o f b) Pt total 90000 Ear sin 90000 10 225.92 2300 3 Ear có phần ảo PF trễ nên CuuDuongThanCong.com https://fb.com/tailieudientucntt Ear B 225.92 j I l 20 36.87 Im A 12 j 2300 Ear 10 j ( A 12 j ) B 225.92 j B 1447.9 Ear 1465.41 8.87 Il 2600000 arccos 0.87 750.18 29.54 A 2300 0.87 b) ng Im 750.18 sin(29.54) j 369.86 j ( A) c om 6.18 a) co Ia 750.18 cos(29.54) 652.67 A th 2300 1.6 j 369.86 j 1919.68 ng Ear an c) 6.19 cu u du o 3000000 25.84 524.86 25.84 3300 3300 Ear 1.5 j 524.86 25.84 2357.4117.5 3300 2357.41 sin(17.5) e T 14330n m 1.5 60 Ia 6.20 a) CuuDuongThanCong.com https://fb.com/tailieudientucntt m 40 900000 225.92 2300 2300 Ear, m j 225.92 1402 18.8 2300 1402 sin(18.8) e T 7161.61n m 40 Im c om b) I l 200 45 P jQ 2300 39321 1463383 563382 j co 6.21a) ng Ia 200 45 225.92 393.6 21 PF 0.93lagging Ear Va sin 250000 1.2 sin 0.685 550 Xs ) 460 3 ( 43.2 250000 Te 1326.29 60 ng th an Pt du o b) 46043.2 (550 ) 262.83 3.23 1.2 j PF 0.998lagging 550 262.83 sin(3.23) 14107VAr Q cu u Ia 6.1/ Máy điện đồng CuuDuongThanCong.com https://fb.com/tailieudientucntt 120 f 1800 p 2 N s m 60 60 Ns 3EaVa sin 1, PT 250.103 (W ) sin 0,6846 43, 20 P T e T 1326 Nm c om m b/ Ear 46043, Ear Va 262,83 3, 23 A j1, 3, 23 cos 0,998 lagging co 3.550 0 262,833, 23 249982 j14107 kVA Q 14107kVA ng Ia * th an T 3Va I a ng 6.2/ a/ Va 132700 du o * PT 3Va I a 1500 j300 I a 0,384 11,3.103 384 11,30 A u I am I a I L 384 11,30 250 450 cu 244, 2715, b/ PF of the motor : , cos 0,9626 leading c/ Ear Va jX s I a 1327 j.2.384 11,3 1396,9 32,6 V 6.3/ a/ CuuDuongThanCong.com https://fb.com/tailieudientucntt 120 f p Ns PT 250.103 W 3Va Ear sin xs sin 0,846 43,0250 b/ 550 46043,025 0 Eas X a Ia jX s j1, * STz 3Va I a .c om 314,58 3, 420 PT 3Va I a cos cos 0,834 550 314,883, 420 ng 6.4/ 120 f 1500 rmp p 2 N s m 60 rad / s 60 Va 1905, 25500 V th an co Ns * I a 175 A du o I a 175 36,870 A ng 3Va I a 1000 kVA Ear jX s I a Va 2015400 V Te 3.Va Ear sin sin 0, 06946 3,980 cu u PT 1000.103.0,8 8.105 PT m 8.105 4244 Nm 60 6.5/ CuuDuongThanCong.com https://fb.com/tailieudientucntt 120 f 360rmp p 2 N s m 12 rad / s 60 cos 1, Va 1327 V Ns I a 201 A Ear Va jX s I a 1386,5 16,850 V 800.103 21220 Nm T 12 6.6 / a/ c om PT e Va 3810 V 120 f 720rmp p 2 N s 24 rad / s m 60 Ia 9536,870 A th Ear Va jX s I a 3810 j15.9536,87 an co ng Ns 4802, 27 13, 73 A 3Va Ear sin Xs ng PT PT 0, 2374 3V Ear u sin du o PT 3Va I a 0, 868, 68.103 W m cu 13, 740 P T e T 11524 Nm b/ Công suất phảng kháng từ nguồn là: Q PT 651, 6.103 VAR 0,8 c/ CuuDuongThanCong.com https://fb.com/tailieudientucntt 6.7/ a/ PT 33kW 3Va Ear sin Xs motor Ear 220 30 Ia I a Ear 127 220 30 10030 jX s j1, 27 c om PF of motor 0,866 leading b/ I a I L 50 450 100300 122,836,840 A cos 6,84 0.993, leading ng 6.8/ a/ 120 f 300 rmp p 2 N s 10 rad / s m 60 Va 1963 V an th ng I a 1360,5 A co Ns Te PT m du o Ear Va jX s I a 2388, 434,7 V 254648 N m u b/ sin cu Eas 2388, 434,7 X s PT 0,5688 3Va Ear 34, 660 CuuDuongThanCong.com https://fb.com/tailieudientucntt c/ I r new 1, I r old Ear new I r new E old I r old Ear new 1, Ear sin new sin 0, 474 1, Ia Ear new Va jX s c om 28, 290 1678 13,550 6.9/ a/ 120 f 1200 rmp p 2 N s 40 rmp m 60 an co ng Ns T e machanical load : 87kW 692,3 N m 40 6.10/ a/ u 90kW 716, N m 40 cu PT losses 40 du o T e rlectrical origin : th m ng PT CuuDuongThanCong.com https://fb.com/tailieudientucntt PT 3Va Ear sin Xs sin 0,6846 43, 20 b/ Ia Ear Va 263 3, 230 jX s cos 0,998 lagging kVA c om * ST 3Va I a 250 j14,116 c/ I anew 263 36,870 A Ear Va I a jX s cu u du o ng th an co ng 566,326, 477 CuuDuongThanCong.com https://fb.com/tailieudientucntt