±¾ÎĽ«½éÉÜÈçºÎÈ·¶¨125wµ¥Ïàµç»úËùÐèµÄµçÈÝ´óС£¬ÒÔ¼°Åäµç·½°¸ºÍ¼ÆËã·½·¨¡£

1. È·¶¨µçÈÝ´óС
125wµ¥Ïàµç»úËùÐèµÄµçÈÝ´óСȡ¾öÓÚµç»úµÄ¹¦Âʺ͵çÔ´µÄµçѹ¡£Ò»°ãÀ´Ëµ£¬µçÈÝ´óСӦΪµç»ú¶î¶¨¹¦ÂʵÄ2-3±¶£¬µçѹΪµçÔ´¶î¶¨µçѹ¡£
ÒÔ125wµ¥Ïàµç»úΪÀý£¬Èç¹ûµçÔ´µçѹΪ220V£¬µçÈÝ´óСӦΪ125w2/220V=1.14uF×óÓÒ¡£
2. Åäµç·½°¸
ÔÚ½øÐÐÅäµçʱ£¬Ó¦¸ù¾Ýµç»úµÄ¶î¶¨µçÁ÷ºÍµçÈݵĶµçѹѡÔñºÏÊʵĶÏ·Æ÷¡¢½Ó´¥Æ÷ºÍµçÈÝÆ÷¡£
ÀýÈ磬¶ÔÓÚ125wµ¥Ïàµç»ú£¬Æä¶î¶¨µçÁ÷ԼΪ0.9£¬Òò´Ë¿ÉÒÔÑ¡Ôñ2µÄ¶Ï·Æ÷ºÍ½Ó´¥Æ÷£¬µçÈÝÆ÷¶î¶¨µçѹӦΪ250V¡£
3. ¼ÆËã·½·¨
È·¶¨µçÈÝ´óСºÍÅäµç·½°¸ºó£¬¿ÉÒÔʹÓÃÒÔϹ«Ê½¼ÆËãËùÐèµçÈÝÆ÷µÄµçÈÝÖµ
C=I/(2¦Ðf¦¤V)
ÆäÖУ¬CΪµçÈÝÆ÷µÄµçÈÝÖµ£¬IΪµç»úµÄ¶î¶¨µçÁ÷£¬fΪµçԴƵÂÊ£¬¦¤VΪµçÈÝÆ÷¶î¶¨µçѹ¡£
ÒÔ125wµ¥Ïàµç»úΪÀý£¬¼ÙÉèµçԴƵÂÊΪ50Hz£¬µçÈÝÆ÷¶î¶¨µçѹΪ250V£¬ÄÇôËùÐèµçÈÝֵΪ
C=0.9/(2¦Ð50Hz250V)=0.00114F=1.14uF
Òò´Ë£¬125wµ¥Ïàµç»úËùÐèµÄµçÈÝ´óСΪ1.14uF×óÓÒ¡£
È·¶¨125wµ¥Ïàµç»úËùÐèµÄµçÈÝ´óСÐèÒª¿¼Âǵç»úµÄ¹¦Âʺ͵çÔ´µÄµçѹ£»Åäµç·½°¸Ó¦¸ù¾Ýµç»úµÄ¶î¶¨µçÁ÷ºÍµçÈݵĶµçѹѡÔñºÏÊʵĶÏ·Æ÷¡¢½Ó´¥Æ÷ºÍµçÈÝÆ÷£»¼ÆËãËùÐèµçÈÝÆ÷µÄµçÈÝÖµ¿ÉÒÔʹÓù«Ê½C=I/(2¦Ðf¦¤V)¡£