£¨2£©¸Ãµç¶¯»úµÄÆð¶¯×ª¾Ø¡£ £¨3£©¸Ãµç¶¯»úµÄ×î´óת¾Ø¡£ ½â£º £¨1£©TN?9550PN(kW)10?9550??65.9N.m(Å£¶Ù¡¤Ã×)
nN(r/min)1450£¨2£©Tst??1.2TN?1.2?65.9?79N.m £¨3£©Tm??TN?1.8?65.9?118.5N.m
24£®ÓÐһ̨50HzµÄÒì²½µç¶¯»ú£¬¶î¶¨×ªËÙnN=730ת/·Ö£¬¿ÕÔØת²îÂÊΪ0.00267£¬ÊÔÇó¸Ãµç¶¯»úµÄ¼«Êý£¬Í¬²½×ªËÙ¡¢¿ÕÔØתËÙ¼°¶î¶¨¸ºÔØʱµÄת²îÂÊ¡£
½â£ºÍ¬²½×ªËÙn1=
60f60?503000==ת/·Ö£¬¹Ê pppµ±p=1ʱ£¬n1=3000ת/·Ö£»µ±p=2ʱ£¬n1=1500ת/·Ö£»µ±p=3ʱ£¬n1=1000ת/·Ö£»µ±p=4ʱ£¬n1=750ת/·Ö¡£
ÒÑÖª¶î¶¨×ªËÙΪ730ת/·Ö£¬Òò¶î¶¨×ªËÙÂÔСÓÚͬ²½×ªËÙ£¬¹Êp=4¡£ ¿ÕÔØתËÙn0?=n1(1-s0)=750¡Á(1-0.00267)=748ת/·Ö ¶î¶¨×ª²îÂÊs?n1?nn1?100%=
750?730?100%=2.67% 75025£®ÒÑÖªY90S-4ÐÍÈýÏàÒì²½µç¶¯»úµÄ¶î¶¨Êý¾ÝΪ£º¹¦ÂÊPn=1.1kW£¬µçԴƵÂÊf1=50Hz£¬¶¨×ÓµçѹU1n=380V£¬Ð§ÂʦÇn=0.79£¬¹¦ÂÊÒòÊýcos?n=0.78£¬×ªËÙnn=1400r/min£¬×î´óת¾ØÓë¶î¶¨×ª¾ØÖ®±ÈTmax/Tn=2.2¡£
Ç󣺣¨1£©Í¬²½×ªËÙn1£»£¨2£©¶¨×ӶµçÁ÷£»£¨3£©¶î¶¨×ª¾Ø£»£¨4£©×î´óת¾Ø¡£
26£®Ò»Ì¨ÈýÏàÒì²½µç¶¯»ú£¬¶¨×ÓÈÆ×é°´ÐÇÐη½Ê½½ÓÈëÏßµçѹΪ380·üµÄÈýÏཻÁ÷µçÔ´ÉÏ¡£²âµÃÏßµçÁ÷Ϊ6°²£¬×ÜÓй¦¹¦ÂÊΪ3ǧÍß¡£ÊÔ¼ÆËã¸÷ÏàÈÆ
×éµÄµÈЧµç×èRºÍµÈЧ¸Ð¿¹XLÖµ¡£
½â£º
cos??30003380?6?0.76 sin??sin(arccos0.76)?0.65
UYP=380¡Â1.732=220V IYl=IYP=6A Ôò¨Oz¨O=220¡Â6¡Ö36.7¦¸ R?z?cos??36.7?0.76?27.9? XL?z?sin??36.7?0.65?23.9?
L=23.9¡Â314¡Ö76mH
27£®Ä³4.5KWÈýÏàÒì²½µç¶¯»úµÄ¶î¶¨µçѹΪ380V£¬¶î¶¨×ªËÙΪ950r/min£¬¹ýÔØϵÊýΪ1.6¡£Çó£¨1£©TN¡¢TM£»£¨2£©µ±µçѹϽµÖÁ300Vʱ£¬ÄÜ·ñ´ø¶î¶¨¸ºÔØÔËÐУ¿
½â£º¢ÙTN?9550PN4.5?9550?45.2N?m TM?TN?1.6?45.2?1.6?72.4N?m nN9502
¢ÚÓÉÓÚµç´Åת¾ØÓëµçѹµÄƽ·½³ÉÕý±È£¬¼´TM¡ä=£¨300/380£©TM=45.1N¡¤m ËùÒÔµ±µçѹϽµÖÁ300Vʱ£¬¸Ãµç¶¯»ú²»ÄÜ´ø¶î¶¨¸ºÔØÔËÐС£ 28£®ÈçÏÂͼËùʾµç··ÖѹʽƫÖ÷Ŵóµç·ÖУ¬ÒÑÖªRC£½3.3K¦¸£¬RB1£½40K¦¸£¬RB2£½10K¦¸£¬RE£½1.5K¦¸£¬¦Â=70¡£Çó£º £¨1£©»³öÖ±Á÷ͨ·£» £¨2£©Çó¾²Ì¬¹¤×÷µãIBQ¡¢ICQºÍUCEQ£» £¨3£©µç·¿ÕÔØʱµÄµçѹ·Å´ó±¶Êý¡£ ui C1 £« RB1 RC C2 £« £«25V RB2 RE CE u0 ½â£º£¨1£©Ö±Á÷ͨ· £«25V RB1 RC RB2 RE £¨2£©ÕâÊÇÒ»¸ö¾ßÓй̶¨Æ«Öõç×è¼°Ö±Á÷·´À¡»·½ÚµÄ¹²·¢É伫µçѹ·Å´óÆ÷¡£Æ侲̬¹¤×÷µã£º 25?105?0.7?5V IC?IE??2.87mA40?101.5 Q= IB?2.87?41?A 70UCE?25?2.87(3.3?1.5)?11.2VVB?£¨3£©rbe?300?(1??)26(mV)26?300?(1?70)?943??0.943 k??1K? IE(mA)2.87?R70?3.3?Au??C????231 rbe129£®ÔÚÏÂͼµç·ÖУ¬UCC?12V£¬RC?4K?£¬RB?300K?£¬VBEQ£½0.7V£¬¦Â£½50¡£Çó£º £¨1£©»³öµç·µÄÖ±Á÷ͨ·£» £¨2£©Çóµç·µÄ¾²Ì¬¹¤×÷µã£» £¨3£©»³öËùʾµç·µÄ΢±äµÈЧµç·£» £¨4£©Çó¸ºÔØ¿ªÂ·Ê±µÄµçѹ·Å´ó±¶ÊýAu?ºÍÊäÈëµç×èri¡¢Êä³öµç×èro£» £¨5£©Èôµç·¸ºÔØRL?4K?ʱ£¬Çó¸ºÔØ״̬ϵĵçѹ·Å´ó±¶ÊýAu¡¢riºÍro¡£ ½â£º£¨1£©Ö±Á÷ͨ·£º £¨2£©µç·µÄ¾²Ì¬¹¤×÷µã IB?UCC?UBE12?0.7??0.04mA?40?A RB300IC??IB?50?0.04?2mA UCE?UCC?ICRC?12?2?4?4V £¨3£©Î¢±äµÈЧµç· £¨4£©¿ÕÔØʱµçѹ·Å´ó±¶Êý