·¢²¼Ê±¼ä : ÐÇÆÚ¶þ ÎÄÕµç×Ó²âÁ¿¼¼Êõ»ù´¡¿ÎºóÏ°Ìâ´ð°¸-ÕÅÓÀÈ𣨵ڶþ°æ£©¸üÐÂÍê±Ï¿ªÊ¼ÔĶÁ75d164f7af45b307e971978a
Á
???Rx??I?Rx?£?2IRi£E?E?I£½0 ?£½2?IRi£IE??µÃ£ºI£½E1£½Im 2Ri2¼´Ö¸ÕëÔÚÖÐÑëλÖÃʱ£¬²âÁ¿µç×èµÄÎó²î×îС¡£
2.19 Á½Ö»µç×è·Ö±ðΪR1£½20¦¸¡À2%£¬R2£½(100¡À0.4) ¦¸£¬Çó£ºÁ½µç×è´®Áª¼°²¢ÁªÁ½ÖÖ½Ó·¨Ê±µÄ×ܵç×èºÍÏà¶ÔÎó²î¡£
½â£º´®ÁªÊ±£ºÏà¶ÔÎó²î£º
r´®£½?£¨£½?£¨R1R2 rR1£«rR2£©R1£«R2R1£«R2201000.4?2%£«?£©£½?0.66%
20£«10020£«100100¦«R´®£½120¡Á0.66%£½0.8¦¸ ×ܵç×裺120¡À0.8¦¸
R2(R1£«R2)£R1R2R1(R1£«R2)£R1R2¡¤?R1£«¡¤?R2 ²¢ÁªÊ±£º?R²¢£½22(R1£«R2)(R1£«R2)R1R22R2R12¡¤r£«¡¤r £½2R12R2
(R1£«R2)(R1£«R2)rR²¢£½?R²¢R²¢£½R2R1¡¤rR1£«¡¤rR2
R1£«R2R1£«R2·ûºÅÓÐÕýÓиºÊ±£º
?R2?R1rR²¢£½??rR1£«rR2?
R1£«R2?R1£«R2?200.4??100£½???2%£«??
20£«10020£«100100??£½?1.77%
R²¢£½20//100£½16.7¦¸ ¦«R²¢£½¡À16.7¡Á1.77%£½¡À0.3¦¸
²¢ÁªÊ±µÄ×ܵç×èΪ£º16.7¦¸¡À0.3¦¸
2.20 ÓÃÒ»Ö»Á¿³ÌΪ5V£¬×¼È·¶Ès£½1.5¼¶µçѹ±í²âÁ¿Ìâ2.20ͼÖÐa¡¢bµãµçλ·Ö±ðΪ ºÍUa£½4.26V£¬Ub£½4.19V£¬ºöÂÔµçѹ±íµÄ¸ºÔØЧӦ£¬Çó£º
¢Ù Ua¡¢Ub¾ø¶ÔÎó²î¡¢Ïà¶ÔÎó²î¸÷Ϊ¶àÉÙ£¿
¢Ú ÀûÓÃUab£½Ua£Ub¹«Ê½¼ÆË㣬ÔòµçѹUabµÄ¾ø¶ÔÎó²îºÍÏà¶ÔÎó²î¸÷Ϊ¶àÉÙ£¿ ½â£º£º¦¤Ua£½¦¤Ub£½¦¤Um£½¡Às%¡¤Um £½¡À1.5%¡Á5£½0.075V Uab£½4.26£4.19£½0.07V
8
rab£½?(4.264.191.76%£«1.79%) 0.070.07£½¡À214.26%
¦¤Uab£½rab¡ÁUab£½¡À214.26%¡Á0.07£½¡À0.15V Ìâ 2.20 ͼ
2.21 ÓõçÇÅ·¨²âµç×èʱ£¬ÀûÓù«Ê½Rx£½R1¡¤R3 / R2£¬ÒÑÖªR1£½100¦¸£¬¦¤R1£½¡À0.1¦¸£¬R3
£½100¦¸£¬¦¤R3£½¡À0.1¦¸£¬R2£½1000¦¸£¬¦¤R2£½¡À0.1¦¸¡£Ç󣺲âµÃÖµRxµÄÏà¶ÔÎó²î¡£
½â£ºr R1£½¡À0.1/100£½¡À0.1% r R3£½¡À0.1% r R2£½¡À1/1000£½¡À0.1%
(0.1%£«0.1%£«0.1%)£½¡À0.3% rRx£½?(rR1£«rR3£«rR2)£½¡À
2.22 µç×èÉÏÏûºÄµÄµçÄÜW£½U2/ R¡¤t£¬ÒÑÖªrU£½¡À1% , rR£½¡À0.5% £¬rt£½¡À1.5%£¬ÇórW¡£ ½â£ºr£½¡À4% £¨2rU£«rt£«rR£©£½?£¨2?1%£«1.5%£«0.5%£©W£½?2.23 ½ðÊôµ¼ÌåµÄµçµ¼ÂÊ¿ÉÓæң½4L /¦Ðd2 R¹«Ê½¼ÆË㣬ʽÖÐL(cm)¡¢d(cm)¡¢R(¦¸)·Ö±ðΪµ¼Ïߵij¤¶È¡¢Ö±¾¶ºÍµç×èÖµ£¬ÊÔ·ÖÎöÔÚʲôÌõ¼þϦҵÄÎó²î×îС£¬¶ÔÄĸö²ÎÊýµÄ²âÁ¿×¼È·¶ÈÒªÇó×î¸ß¡£
½â£º??£½£¨12LL?L£?d£?R£© 2322?dRdRdR4???£½?L?d?R£2££½rL£2rd£rR LdRµ±rL£½2 rd£«rR ʱ£¬¦¤¦Ò/¦Ò£½0 ×îС¡£µ¼ÌåµÄÖ±¾¶²ÎÊýdµÄ²âÁ¿×¼È·¶ÈÒªÇó×î¸ß¡£ 2.24 µçÇŲâÒ»¸ö50mH×óÓҵĵç¸Ð£¬ÓÉÓÚËæ»úÎó²îµÄÓ°Ï죬ʹµç¸ÐµÄ²âÁ¿ÖµÔÚLO¡À0.8mH
µÄ·¶Î§Äڱ仯¡£ÈôÏ£Íû²âÁ¿ÖµµÄ²»È·¶¨¶È·¶Î§¼õСµ½0.3mHÒÔÄÚ£¬ÈÔʹÓøõçÇÅ£¬ÎʿɲÉÓÃʲô°ì·¨¡£
½â£º²ÉÓöÔÕÕ·¨½øÐвâÁ¿£¬µÚÒ»´Î²âÁ¿µçÇÅƽºâʱÓУº
j¦ØL0¡¤R3£½j¦ØLs1¡¤R4 Ôò£º L0£½Ls1¡¤R4/ R3 Èô
rym£½?(rR4£«Ls£«r11R3 )rR4£½Ls1£½rR3£½Ls Ôò£ºrym1£½?3Ls
µÚ¶þ´Î²âÁ¿Ê±£¬½»»»L0ÓëLsµÄλÖ㬵çÇÅƽºâʱÓУº j¦ØL0¡¤R4£½j¦ØLs2¡¤R3 Ôò£º L0£½Ls2¡¤R3/ R4 ±È½ÏÁ½¸öL0µÄ±í´ïʽÓУº
L0£½Ls1Ls2Èô
Ôò£º rym2£½?(11Ls1£«Ls2) 22Ls1£½LS2£½Ls13 Ôò£ºrym2£½?Ls
ËùÒÔ£ºrym2£½rym1£½?0.27
9
2.25 Ìâ2.25ͼÖУ¬ÓÃ50VÁ¿³Ì½»Á÷µçѹ±íͨ¹ý²âÁ¿U1¡¢U2»ñµÃUÖµ£¬ÏÖU1£½ U2 £½40V£¬ÈôÔÊÐíUµÄÎó²î¡À2£¥£¬Îʵçѹ±íµÄ׼ȷ¶ÈӦΪ¼¸¼¶£¿
½â£º¦¤U1£½¦¤U2£½¡Às%¡ÁUm£½¡Às%¡Á50£½0.5s ru1£½ru2£½¡À0.5s/40£½¡À1.25s%
r£½?(4040rU1£«rU2)£½¡À1.25s%
40£«4040£«40ÒÀÌâÒâµÃ£º¡À1.25s%£½¡À2 %
½âµÃ£ºs£½1.6 ËùÒÔ£¬Ñ¡ÓÃ1.5¼¶µÄµçѹ±í¡£ Ìâ2.25ͼ
2.26 ÓÃʾ²¨Æ÷²âÁ¿Ìâ2.26ͼËùʾµ÷·ù²¨µÄµ÷·ùϵÊý
M£½A£B?100%£¬ÒÑÖªA¡¢B²âÁ¿Îó²î¡À10£¥£¬Îʵ÷·ùϵÊýÎó²îΪ¶àÉÙ£¿ A£«B2B2A?A£?B ½â£º?M£½22£¨A£«B£©£¨A£«B£©rM£½2AB2ABr£r22A22B
A£BA£Bµ±A¡¢BÓÐÕýÓиºÊ±£ºrM£½?Ìâ2.26ͼ
4ABr22AA£B
2.27 ÓÃÊý×Öµçѹ±í²âµÃÒ»×éµçѹֵÈçÏÂ±í£º
n 1 2 3 4 5 xi 20.42 20.43 20.40 20.43 20.42 n 6 7 8 9 10 xi 20.43 20.39 20.30 20.40 20.43 n 11 12 13 14 15 xi 20.42 20.41 20.39 20.39 20.40 ÅжÏÓÐÎÞ»µÖµ£¬Ð´³ö²âÁ¿±¨¸æÖµ¡£
1n½â£º£¨1£©Óù«Ê½x??xiÇóËãÊõƽ¾ùÖµ¡£
ni115x£½?(20.42£«20.43£«¡¡£«20.40)£½20.404
15i?1£¨2£©ÁгöviºÍvi2Èç±í2.27£1
1n21152vi£½vi¡Ö0.0327 £¨3£©?£½??n£1i?1n£1i?1
10
±í2.27£1 n 1 2 3 4 5 vi 0.016 0.026 -0.004 0.026 0.016 vi2 n vi 0.026 -0.014 -0.104 -0.004 0.026 vi2 0.000676 0.000196 0.010816 0.000016 0.000676 n 11 12 13 14 15 vi 0.016 0.006 -0.014 -0.014 -0.014 vi2 0.000256 0.000036 0.000196 0.000196 0.000016 0.000256 6 0.000676 7 0.000016 8 0.000676 9 0.000256 10 3¦Ò£½0.098
´Ó±í2.27ÖпÉÒÔ¿´³ö£¬Ê£Óà²Ð²î×î´óµÄµÚ8¸ö²âÁ¿Êý¾Ý£¬ÆäֵΪ£º
v8£½£0.10£½0.10£¾3?£¬n8Ϊ»µÖµÓ¦ÌÞ³ý¡£
£¨4£©ÌÞ³ýn8ºóµÄËãÊõƽ¾ùÖµ
x£§£½20.414
£¨5£©ÖØÐÂÁгöviºÍvi2Èç±í2.27£2
±í2.27£2 n vi vi2 0.000036 0.000256 0.000196 0.000256 0.000036 n vi vi2 0.000256 0.000576 0.000196 0.000256 n 10 11 12 13 14 vi 0.006 -0.004 -0.024 -0.024 -0.014 vi2 0.000036 0.000016 0.000576 0.000576 0.000196 1 0.006 2 0.016 3 -0.014 4 0.016 5 0.006 6 0.016 7 -0.024 8 -0.014 9 0.016 £¨6£©ÌÞ³ýn8ºóµÄ±ê×¼²îµÄ¹À¼ÆÖµ
?£§¡Ö0.0163 3?£§¡Ö0.0489
£¨7£©ÌÞ³ýn8ºóÎÞ»µÖµ
?? 8£½0.0130?x£½?/n £½0.0163/14 £½0.00436 3?xÒò´ËÓÃÊý×Öµçѹ±í²âµÃ½á¹ûΪ£º20.414¡À0.013
2.28 °´ÕÕÉáÈë·¨Ôò£¬¶ÔÏÂÁÐÊý¾Ý´¦Àí£¬Ê¹Æä¸÷±£ÁôÈýλÓÐЧÊý×Ö£º
86.372 4£¬ 8.914 5£¬ 3.175 0£¬ 0.003 125£¬ 59 450
½â£º86.372 4£½86.4 8.914 5£½8.91 3.175 0£½3.18 0.003 125£½0.00312 59 450£½594¡Á102 2.29 °´ÕÕÓÐЧÊý×ÖµÄÔËËã·¨Ôò£¬¼ÆËãÏÂÁи÷½á¹û£º ¢Ù 1.0713¡Á3.2£½3.42 ¢Ú 1.0713¡Á3.20£½3.43 ¢à 40.313¡Á4.52£½182.2 ¢Ü 51. 4¡Á3.7£½190 ¢Ý 56.09£«4.6532£½60.74 ¢Þ 70.4£0.453£½70.0
2.30 ijµçѹ·Å´óÆ÷£¬²âµÃÊäÈë¶ËµçѹUi£½1.0mV£¬Êä³ö¶ËµçѹUo£½1200mV£¬Á½ÕßÏà¶ÔÎó²î¾ùΪ¡À2£¥£¬Çó·Å´óÆ÷ÔöÒæµÄ·Ö±´Îó²î¡£
£¨rU0£«rUi£©£½?£¨2%£«2%£©£½?4% ½â£ºrx£½?rdB£½20lg£¨1£«4%£©£½¡À£¨20¡Á0.017£©£½¡À0.34dB
11