£¨3£©Éè¼Æ×ªËÙµ÷½ÚÆ÷ASR,¼ÆËãÆä²ÎÊýRn ¡¢Cn ¡¢COn¡£(R0=40k¦¸) £¨4£©¼ÆËãµç¶¯»ú´ø40%¶î¶¨¸ºÔØÆð¶¯µ½×îµÍתËÙʱµÄתËÙ³¬µ÷Á¿¦Òn¡£ £¨5£©¼ÆËã¿ÕÔØÆð¶¯µ½¶î¶¨×ªËÙµÄʱ¼ä¡£
*Uim88½â£º£¨1£©?????0.0173V/A
Idm1.5?IN1.5?308 ??Unm10V??0.01Vmin/r nN1000r/min£¨2£©µçÁ÷µ÷½ÚÆ÷Éè¼Æ È·¶¨Ê±¼ä³£Êý£º(a)Ts?1?0.000125s 8000111,Òò´ËÈ¡Toi=0.0006¡£ (b) 1?(~)Toi510TPWM(c)T?i?Ts?Toi=0.000725s¡£
µçÁ÷µ÷½ÚÆ÷½á¹¹È·¶¨£º
ÒòΪ?i?5%£¬¿É°´µäÐÍIÐÍϵͳÉè¼Æ£¬Ñ¡ÓÃPIµ÷½ÚÆ÷£¬WACR(S)?µçÁ÷µ÷½ÚÆ÷²ÎÊýÈ·¶¨: ?i?Tl=0.01s¡£
µçÁ÷»·¿ª»·ÔöÒæ£ºÒªÇó?i?5%ʱ£¬°´±í4-1£¬Ó¦È¡KIT?i?0.5£¬Òò´Ë
Ki(?iS?1),
?iSKI?0.50.5??689.655s?1T?i0.000725
ÓÚÊÇ£¬ACRµÄ±ÈÀýϵÊýΪ
Ki?KI?iR689.655?0.01?0.1??1.13898 Ks?35?0.0173УÑéµÈЧÌõ¼þ£º
?1µçÁ÷»·½ØÖ¹ÆµÂÊ£º?ci?KI?689.655 s
£¨1£©Ð£ÑéÕûÁ÷×°Öô«µÝº¯ÊýµÄ½üËÆÌõ¼þ
11??2666.6 s?1??ci Âú×ã½üËÆÌõ¼þ 3Ts3?0.000125£¨2£©Ð£ÑéºöÂÔ·´µç¶¯ÊƱ仯¶ÔµçÁ÷»·¶¯Ì¬Ó°ÏìµÄÌõ¼þ
311?3??86.602 s?1??ci Âú×ã½üËÆÌõ¼þ TmTl0.12?0.01£¨3£©Ð£ÑéµçÁ÷»·Ð¡Ê±¼ä³£Êý½üËÆ´¦ÀíÌõ¼þ
1111???1217.16 s?1??ci Âú×ã½üËÆÌõ¼þ
3TsToi30.000125?0.006¿É¼ûÂú×ã½üËÆµÈЧÌõ¼þ£¬µçÁ÷µ÷½ÚÆ÷µÄʵÏÖ£ºÑ¡R0?40K,Ôò£º
Ri?KiR0?0.2243?40?8.97K, ȡ9K.
Ci??iRi?0.012?1.33?F 9?103C0i?4T0i4?0.0025??0.25?F 3R040?101 KI£¨3£©µçÁ÷»·µÈЧʱ¼ä³£Êý
KIT?i?0.5Ôò2T?i?2?0.000725?0.00145 Ton?0.015s
T?n?1?Ton?0.00145?0.015?0.01645 KIËٶȵ÷½ÚÆ÷½á¹¹È·¶¨£º
°´ÕÕÎÞ¾²²îµÄÒªÇó£¬Ó¦Ñ¡ÓÃPIµ÷½ÚÆ÷£¬
WASR(S)?Kn(?nS?1)/?nS
Ëٶȵ÷½ÚÆ÷²ÎÊýÈ·¶¨£º?n?hT?n?5?0.01645?0.08225 תËÙ»·¿ª»·ÔöÒæ
KN?h?16??443.4542222 2hT?n2?5?0.01645ASRµÄ±ÈÀýϵÊý
Kn?(h?1)?CeTm6?0.0173?0.196?0.12??21.202
2h?RT?n2?5?0.007?0.1?0.01645УÑéµÈЧÌõ¼þ£º תËÙ»·½ØÖ¹ÆµÂÊ
?cn?KN?KN?n?443.454?0.08225?36.474 ?11KI1689.655??325.1??cnÂú×ã¼ò»¯Ìõ¼þ
3T?i30.0007251KI1689.655??71.474??cnÂú×ã¼ò»¯Ìõ¼þ 3Ton30.015תËÙ³¬µ÷Á¿µÄУÑé (¿ÕÔØZ=0£©
308?0.10.01154?n?2?81.2%?1.5?0.196??0.793%¡¶
10000.18??2?81.2%?1.1?(308?0.18/0.196?1000)?(0.02666/0.12)?11.23%?10%
nתËÙ³¬µ÷Á¿µÄУÑé½á¹û±íÃ÷£¬ÉÏÊöÉè¼Æ²»·ûºÏÒªÇó¡£Òò´ËÐèÖØÐÂÉè¼Æ¡£
4.9 ÓÐһתËÙ¡¢µçÁ÷Ë«±Õ»·µ÷ËÙϵͳ,Ö÷µç·²ÉÓÃÈýÏàÇÅʽÕûÁ÷µç·¡£ÒÑÖªµç¶¯»ú²ÎÊýΪ£ºPN =500kW£¬UN =750V£¬IN =760A£¬nN=375 r/min£¬µç¶¯ÊÆÏµÊýCe =1.82V¡¤min/r, µçÊà»ØÂ·×ܵç×èR=0.14¦¸,ÔÊÐíµçÁ÷¹ýÔØ±¶Êý¦Ë=1.5,±ä»»Æ÷µÄ·Å´ó±¶ÊýKs=75,µç´Åʱ¼ä³£ÊýTl=0.031s,»úµçʱ¼ä³£ÊýTm=0.112s,µçÁ÷·´À¡Â˲¨Ê±¼ä³£ÊýT0i=0.0006s,תËÙ·´À¡Â˲¨Ê±¼ä³£ÊýT0n=0.02s¡£Éèµ÷½ÚÆ÷ÊäÈëÊä³öµçѹUnm*=Uim*= Unm =10V,µ÷½ÚÆ÷ÊäÈëµç×èR0=40k¦¸¡£
Éè¼ÆÖ¸±ê:ÎÈ̬ÎÞ¾²²î£¬µçÁ÷³¬µ÷Á¿?i¡Ü5%£¬¿ÕÔØÆð¶¯µ½¶î¶¨×ªËÙʱµÄתËÙ³¬µ÷Á¿?n¡Ü10%¡£µçÁ÷µ÷½ÚÆ÷ÒѰ´µäÐÍIÐÍϵͳÉè¼Æ,²¢È¡²ÎÊýKT=0.5¡£
£¨1£©Ñ¡ÔñתËÙµ÷½ÚÆ÷½á¹¹,²¢¼ÆËãÆä²ÎÊý¡£
£¨2£©¼ÆËãµçÁ÷»·µÄ½ØÖ¹ÆµÂÊ?ciºÍתËÙ»·µÄ½ØÖ¹ÆµÂÊ?cn£¬²¢¿¼ÂÇËüÃÇÊÇ·ñºÏÀí?
*Uim10V½â£º£¨1£©????0.00877V/A
Idm1.5?IN??Unm10V??0.0267Vmin/r nN375r/minµçÁ÷µ÷½ÚÆ÷ÒѰ´µäÐÍIÐÍϵͳÉè¼ÆÈçÏ£º È·¶¨Ê±¼ä³£Êý£º
1?0.000125s È·¶¨Ê±¼ä³£Êý£º(a)Ts?8000
111,Òò´ËÈ¡Toi=0.0006¡£ (b) 1?(~)Toi510TPWM(c)T?i?Ts?Toi=0.000725s¡£
µçÁ÷µ÷½ÚÆ÷½á¹¹È·¶¨£ºÒòΪ¦Ò%¡Ü5%£¬¿É°´µäÐÍIÐÍϵͳÉè¼Æ£¬Ñ¡ÓÃPIµ÷½Ú
TlKi(?iS?1)Æ÷£¬WACR(S)? £¬=42.76¡£¿¹ÈÅÐÔÄÜÂú×ãÒªÇó¡£
T?iS?iµçÁ÷µ÷½ÚÆ÷²ÎÊýÈ·¶¨£º?i?Tl?0.031s£¬KIT?i?0.5 KI?KI?IR136.24?0.031?0.14??0.899 Ks?75?0.008770.5?136.24s?1 T?iKi?УÑéµÈЧÌõ¼þ£º?ci?KI?136.24s?1£¬
a)11??199.6s?1??ci 3TS3?0.00167b)311?3??50.9s?1??ci TmTI0.112?0.031c)1111???182.39s?1??ci
3TsToi30.00167?0.002¿É¼ûÂú×ã½üËÆµÈЧÌõ¼þ¡£
µçÁ÷µ÷½ÚÆ÷µÄʵÏÖ£ºÑ¡R0=40K£¬Ôò
Ri?Ki?R0?0.899?40?35.96 ȡ36K
Ci??iRi?0.031?0.86?F36?1034T4?0.002C0i?0i??0.2?f3R040?10
Ëٶȵ÷½ÚÆ÷Éè¼Æ
Ëٶȵ÷½ÚÆ÷½á¹¹È·¶¨£ºKIT?i?0.5 ÔòµçÁ÷»·Ê±¼ä³£Êý
1?2T?i?2?0.00367?0.00734s KITon?0.02sT?n?1?Ton?0.00734?0.02?0.02734s KI