ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ð¡Ã÷ÂèÂèΪÄÌÄÌÂòÁËÒ»¸öµçÈÈ×ãÔ¡Å裨ÈçͼËùʾ£©£¬ÄÚ²¿ÓɼÓÈÈϵͳºÍ°´Ä¦ÏµÍ³Á½²¿·Ö×é³É¡£¼ÓÈÈϵͳµÄ¼ÓÈȵç×è¶î¶¨µçѹ220V£¬¶î¶¨¹¦ÂÊ605W¡£ÎÊ£º
(1)СÃ÷°ïÄÌÄÌÅݽÅʱ£¬Ïò×ãÔ¡ÅèÖмÓÈë6kg³õÎÂΪ20¡æµÄË®£¬¼ÓÈÈϵͳµÄ¼ÓÈȵç×èÕý³£¹¤×÷15min½«Ë®¼ÓÈȵ½40¡æ£¬´Ë¼ÓÈȹý³ÌÖÐË®ÎüÊÕµÄÈÈÁ¿ÊǶàÉÙ£¿ÏûºÄµÄµçÄÜÊǶàÉÙ£¿[cË®=4.2¡Á103J/£¨kg¡æ£©]
(2)×ãÔ¡Å谴ĦϵͳÖеĵ綯»ú¹¤×÷µçѹÊÇ12V£¨°´Ä¦ÏµÍ³½«½»Á÷µçѹת»»Îª12V£©£¬¹¤×÷µçÁ÷Ϊ4A£¬Æäµç×èΪ0.5¦¸£¬µç¶¯»úµÄ»úе¹¦ÂÊÊǶàÉÙ£¿
¡¾´ð°¸¡¿(1)5.04¡Á105J£»5.445¡Á105J£»(2)40W
¡¾½âÎö¡¿
±¾Ì⿼²éÁ˵繦ÓëÈÈÁ¿µÄ×ۺϼÆË㣬Éæ¼°µ½ÎüÈȹ«Ê½¡¢µç¹¦¹«Ê½ºÍµç¹¦Âʹ«Ê½µÄÓ¦Óã¬ÊìÁ·Ó¦ÓÃÏà¹Ø¹«Ê½¼´¿ÉÕýÈ·½âÌ⣬¹Ø¼üҪעÒâÀí½âµç¹¦ÓëµçÈȵÄÇø±ð¡£
(1)Ë®ÎüÊÕµÄÈÈÁ¿
×ãÔ¡Åè¼ÓÈÈʱÏûºÄµÄµçÄÜΪ
(2)ÓÉÌâÒâ¿ÉÖª£¬µç¶¯»úµÄ»úе¹¦ÂÊΪ
µç¶¯»ú¹¤×÷ÖÐÒò·¢ÈÈËðʧµÄ¹¦ÂÊ£º
µç¶¯»úµÄ»úе¹¦ÂÊΪ
´ð£º(1) ´Ë¼ÓÈȹý³ÌÖÐË®ÎüÊÕµÄÈÈÁ¿ÊÇ5.04¡Á105J£¬ÏûºÄµÄµçÄÜÊÇ5.445¡Á105J£»
(2) µç¶¯»úµÄ»úе¹¦ÂÊÊÇ40W¡£
¡¾ÌâÄ¿¡¿ÈçͼËùʾ£¬ÊÇÒ»¸öÕÕÃ÷ϵͳģÄâ¿ØÖƵç·.ÒÑÖªµçÔ´µçѹU=4.5V£¬¶¨Öµµç×èR1=5¦¸¡£»¬¶¯±ä×èÆ÷R2ÉϱêÓС°25¦¸ 1A¡±£¬R3Ϊ¹âÃôµç×裬Æä×èÖµËæ¹âÕնȵı仯×ñÑijһ¹æÂÉ£¬²¿·ÖÊý¾ÝÈçϱíËùʾ£¨ÏàͬÌõ¼þÏ£¬¹âԽǿ£¬¹âÕÕ¶ÈÔ½´ó£¬¹âÕնȵ¥Î»ÎªÀÕ¿Ë˹£¬·ûºÅΪlx£¬°×Ìì¹âÕնȴóÓÚ31x£©£¬µ±R1Á½¶ËµçѹµÍÖÁ0.5Vʱ£¬¿ØÖÆ¿ª¹Ø×Ô¶¯Æô¶¯ÕÕÃ÷ϵͳ£¨²»¿¼ÂÇ¿ØÖÆ¿ª¹Ø¶ÔÐéÏß¿òÄڵ緵ÄÓ°Ï죩¡£ÀûÓøÃ×°ÖÿÉÒÔʵÏÖµ±¹âÕնȵÍÖÁijһÉ趨ֵE0ʱ£¬ÕÕÃ÷ϵͳÄÚÕÕÃ÷µÆ×Ô¶¯¹¤×÷¡£
¹âÕÕ¶ÈE/1x | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 |
¹âÃôµç×èR3×èÖµ/¦¸ | 60 | 30 | 20 | 15 | 12 | 10 |
£¨1£©±ÕºÏ¿ª¹ØS£¬½«»¬Æ¬PÒÆÖÁb¶Ë£¬ÇóE0Ϊ¶àÉÙ?
£¨2£©ÒªÊ¹E0=1.5lx£¬ÔòR2½ÓÈëµç·µÄµç×èÓ¦µ÷Ϊ¶à´ó?Èô»·¾³µÄ¹âÕնȽµÖÁ1.5lxʱÄܱ£³Ö3min²»±ä£¬ÇóÕâ¶Îʱ¼äÄÚR2ÏûºÄµÄµçÄÜ?
£¨3£©±¾ÏµÍ³¿Éµ÷E0µÄ×îСֵÊÇ?