±äƵÆ÷ÌØÐÔÖª¼¸¶à £¬ÕâЩ֪ʶµãÔçÖªµÀ
Ðû²¼ÈÕÆÚ£º
2021-09-27

±äƵÆ÷ÊÇÀûÓõçÁ¦°ëµ¼ÌåÆ÷¼þµÄͨ¶Ï×÷Óý«¹¤ÆµµçÔ´±ä»»ÎªÁíһƵÂʵĵçÄÜ¿ØÖÆ×°Öà £¬ÄÜʵÏÖ¶Ô½»Á÷Òì²½µç»úµÄÈíÆð¶¯¡¢±äƵµ÷ËÙ¡¢Ìá¸ßÔËת¾«¶È¡¢¸Ä±ä¹¦ÂÊÒòÊý¡¢¹ýÁ÷/¹ýѹ/¹ýÔØ±£»¤µÈ¹¦Ð§¡£

±äƵÆ÷ÌØÐÔÖª¼¸¶à£¬ÕâЩ֪ʶµãÔçÖªµÀ

PWMºÍPAMµÄ²î±ðµã

PWMÊÇÓ¢ÎÄPulse Width Modulation(Âö³å¿í¶Èµ÷ÖÆ)Ëõд £¬°´Ò»¶¨¼ÍÂɸıäÂö³åÁеÄÂö³å¿í¶È £¬ÒÔµ÷ÀíÊä³öÁ¿ºÍ²¨ÐεÄÒ»ÖÖµ÷ÖÆ·½·¨¡£PAMÊÇÓ¢ÎÄPulse Amplitude Modulation(Âö³å·ùÖµµ÷ÖÆ)Ëõд £¬Êǰ´Ò»¶¨¼ÍÂɸıäÂö³åÁеÄÂö³å·ù¶È £¬ÒÔµ÷ÀíÊä³öÁ¿ÖµºÍ²¨ÐεÄÒ»ÖÖµ÷ÖÆ·½·¨¡£

1¡¢µçѹÐÍÓëµçÁ÷ÐÍÓÐʲô²î±ð£¿

±äƵÆ÷µÄÖ÷µç·¸ÅÂÔÉϿɷÖΪÁ½ÀࣺµçѹÐÍÊǽ«µçѹԴµÄÖ±Á÷±ä»»Îª½»Á÷µÄ±äƵÆ÷ £¬Ö±Á÷»ØÂ·µÄÂ˲¨ÊǵçÈÝ£»µçÁ÷ÐÍÊǽ«µçÁ÷Ô´µÄÖ±Á÷±ä»»Îª½»Á÷µÄ±äƵÆ÷ £¬ÆäÖ±Á÷»ØÂ·Â˲¨Êǵç¸Ð¡£

2¡¢ÎªÊ²Ã´±äƵÆ÷µÄµçѹÓëÆµÂʳɱÈÀýµÄ¸Ä±ä£¿

Èκε綯»úµÄµç´Åת¾Ø¶¼ÊǵçÁ÷ºÍ´ÅͨÏ໥×÷ÓõĽá¹û £¬µçÁ÷ÊDz»ÔÊÐíÁè¼Ý¶î¶¨ÖµµÄ £¬²»È»½«ÒýÆðµç¶¯»úµÄ·¢ÈÈ¡£Òò´Ë £¬Èç¹û´Åͨ¼õС £¬µç´Åת¾ØÒ²±Ø¼õС £¬µ¼Ö´øÔØÄÜÁ¦½µµÍ¡£

Óɹ«Ê½E=4.44*K*F*N*¦µ ¿ÉÒÔ¿´³ö £¬ÔÚ±äÆµµ÷ËÙʱ £¬µç¶¯»úµÄ´ÅÂ·Ëæ×ÅÔËÐÐÆµÂÊfXÊÇÔÚÏ൱´óµÄ¹æÄ£ÄÚ±ä¸ï £¬Ëü¼«ÈÝÒ×ʹµç¶¯»úµÄ´Å·ÑÏÖØ±¥ºÍ £¬µ¼ÖÂÀø´ÅµçÁ÷µÄ²¨ÐÎÑÏÖØ»û±ä £¬±¬·¢·åÖµºÜ¸ßµÄ¼â·åµçÁ÷¡£

Òò´Ë £¬ÆµÂÊÓëµçѹҪ³É±ÈÀýµØ¸Ä±ä £¬¼´¸Ä±äƵÂʵÄͬʱ¿ØÖÆ±äÆµÆ÷Êä³öµçѹ £¬Ê¹µç¶¯»úµÄ´Åͨ¼á³ÖÒ»¶¨ £¬ÖÆÖ¹Èõ´ÅºÍ´Å±¥ºÍÏÖÏóµÄ±¬·¢¡£ÕâÖÖ¿ØÖÆ·½·¨¶àÓÃÓÚ·ç»ú¡¢±ÃÀà½ÚÄÜÐÍ±äÆµÆ÷¡£

3¡¢µç¶¯»úʹÓù¤ÆµµçÔ´Çý¶¯Ê± £¬µçѹϽµÔòµçÁ÷Ôö¼Ó£»¹ØÓÚ±äÆµÆ÷Çý¶¯ £¬Èç¹ûƵÂÊϽµÊ±µçѹҲϽµ £¬ÄÇôµçÁ÷ÊÇ·ñÔö¼Ó£¿

ƵÂÊϽµ£¨µÍËÙ£©Ê± £¬Èç¹ûÊä³öÏàͬµÄ¹¦ÂÊ,ÔòµçÁ÷Ôö¼Ó £¬µ«ÔÚת¾ØÒ»¶¨µÄÌõ¼þÏÂ,µçÁ÷ÏÕЩÎȶ¨¡£

4¡¢½ÓÄɱ䯵Æ÷ÔËתʱ £¬µç»úµÄÆð¶¯µçÁ÷¡¢Æð¶¯×ª¾ØÔõÑù£¿

½ÓÄɱ䯵Æ÷ÔËת £¬Ëæ×ŵç»úµÄ¼ÓËÙÏàÓ¦Ìá¸ßƵÂʺ͵çѹ £¬Æð¶¯µçÁ÷±»ÏÞÖÆÔÚ150%¶î¶¨µçÁ÷ÒÔÏÂ(ƾ¾Ý»úÖÖ²î±ð £¬Îª125%~200%)¡£Óù¤ÆµµçÔ´Ö±½ÓÆð¶¯Ê± £¬Æð¶¯µçÁ÷Ϊ¶î¶¨µçÁ÷6~7±¶ £¬Òò´Ë £¬½«±¬·¢»úеµçÆøÉϵĹ¥»÷¡£½ÓÄɱ䯵Æ÷´«¶¯¿ÉÒÔÆ½»¬µØÆð¶¯(Æð¶¯Ê±¼ä±ä³¤)¡£Æð¶¯µçÁ÷Ϊ¶î¶¨µçÁ÷µÄ1.2~1.5±¶ £¬Æð¶¯×ª¾ØÎª70%~120%¶î¶¨×ª¾Ø£»¹ØÓÚ´øÓÐת¾Ø×Ô¶¯ÔöÇ¿¹¦Ð§µÄ±äƵÆ÷ £¬Æð¶¯×ª¾ØÎª100%ÒÔÉÏ £¬¿ÉÒÔ´øÈ«¸ºÔØÆð¶¯¡£

5¡¢V/fģʽÊÇʲôÒâ˼£¿

ƵÂÊϽµÊ±µçѹVÒ²³É±ÈÀýϽµ £¬Õâ¸öÎÊÌâÒÑÔڻظ²4˵Ã÷¡£VÓëfµÄ±ÈÀý¹ØÏµÊÇ¿¼ÂÇÁ˵ç»úÌØÐÔ¶øÔ¤ÏȾö¶¨µÄ £¬Í¨³£ÔÚ¿ØÖÆÆ÷µÄ´æ´¢×°Öã¨ROM£©ÖдæÓм¸ÖÖÌØÐÔ £¬¿ÉÒÔÓÿª¹Ø»ò±ê¶ÈÅ̽øÐÐÑ¡Ôñ¡£

6¡¢°´±ÈÀýµØ¸ÄVºÍfʱ £¬µç»úµÄת¾ØÈçºÎ±ä¸ï£¿

ƵÂÊϽµÊ±ÍêÈ«³É±ÈÀýµØ½µµÍµçѹ £¬ÄÇôÓÉÓÚ½»Á÷×迹±äС¶øÖ±Á÷µç×èÎȶ¨ £¬½«Ôì³ÉÔÚµÍËÙϱ¬·¢µØ×ª¾ØÓмõСµÄÇãÏò¡£Òò´Ë £¬ÔÚµÍÆµÊ±¸ø¶¨V/f,ҪʹÊä³öµçѹÌá¸ßһЩ £¬ÒÔ±ã»ñµÃÒ»¶¨µØÆð¶¯×ª¾Ø,ÕâÖÖÅâ³¥³ÆÔöÇ¿Æð¶¯¡£¿ÉÒÔ½ÓÄÉÖÖÖÖÒªÁìʵÏÖ £¬ÓÐ×Ô¶¯½øÐеÄÒªÁ졢ѡÔñV/fģʽ»òµ÷½âµçλÆ÷µÈÒªÁì¡£

7¡¢ÔÚ˵Ã÷ÊéÉÏд×űäËÙ¹æÄ£60~6Hz £¬¼´10£º1 £¬ÄÇôÔÚ6HzÒÔϾÍûÓÐÊä³ö¹¦ÂÊÂð£¿

ÔÚ6HzÒÔÏÂÈÔ¿ÉÊä³ö¹¦ÂÊ £¬µ«Æ¾¾Ýµç»úÎÂÉýºÍÆð¶¯×ª¾ØµÄ¾ÞϸµÈÌõ¼þ £¬¸üµÍʹÓÃÆµÂÊÈ¡6Hz×óÓÒ £¬´Ëʱµç¶¯»ú¿ÉÊä³ö¶î¶¨×ª¾Ø¶ø²»»áÒýÆðÑÏÖØµÄ·¢ÈÈÎÊÌâ¡£±äƵÆ÷ʵ¼ÊÊä³öƵÂÊ£¨Æð¶¯ÆµÂÊ£©Æ¾¾Ý»úÖÖΪ0.5~3Hz¡£

8¡¢¹ØÓÚÒ»°ãµç»úµÄ×éºÏÊÇÔÚ60HzÒÔÉÏÒ²ÒªÇóת¾ØÒ»¶¨ £¬ÊÇ·ñ¿ÉÒÔ£¿

ͨ³£Çé¿öÏÂÊDz»¿ÉÒԵġ£ÔÚ60HzÒÔÉÏ£¨Ò²ÓÐ50HzÒÔÉϵÄģʽ£©µçѹÎȶ¨ £¬¸ÅÂÔΪºã¹¦ÂÊÌØÐÔ £¬ÔÚ¸ßËÙÏÂÒªÇóÏàͬת¾ØÊ±...

9¡¢Ëùν¿ª»·ÊÇʲôÒâ˼£¿

¸øËùʹÓõĵç»ú×°ÖÃÉèËٶȼì³öÆ÷£¨PG£© £¬½«Êµ¼ÊתËÙ·´Ïì¸ø¿ØÖÆ×°ÖýøÐпØÖÆµÄ £¬³ÆÎª¡°±Õ»·¡± £¬²»±ØPGÔËתµÄ¾Í½Ð×÷¡°¿ª»·¡±¡£Í¨ÓÃ±äÆµÆ÷¶àΪ¿ª»··½·¨ £¬Ò²ÓеĻúÖÖÀûÓÃÑ¡¼þ¿É½øÐÐPG·´Ïì.ÎÞËÙ¶È´«¸ÐÆ÷±Õ»·¿ØÖÆ·½·¨ÊÇÆ¾¾Ý½¨Á¢µÄÊýѧģÐÍÆ¾¾Ý´ÅÍ¨ÍÆËãµç»úµÄʵ¼ÊËÙ¶È £¬Ï൱ÓÚÓÃÒ»¸öÐéÄâµÄËÙ¶È´«¸ÐÆ÷Ðγɱջ·¿ØÖÆ¡£

10¡¢Êµ¼ÊתËÙ¹ØÓÚ¸ø¶¨ËÙ¶ÈÓÐÆ«²îʱÈçºÎ°ì£¿

¿ª»·Ê± £¬±äƵÆ÷×ÝÈ»Êä³ö¸ø¶¨ÆµÂÊ £¬µç»úÔÚ´ø¸ºÔØÔËÐÐʱ £¬µç»úµÄתËÙÔڶת²îÂʵĹæÄ£ÄÚ£¨1%~5%£©±ä»»¡£¹ØÓÚÒªÇóµ÷ËÙ¾«¶È±È½Ï¸ß £¬×ÝÈ»¸ºÔر任ҲҪÇóÔÚ½üÓÚ¸ø¶¨ËÙ¶ÈÏÂÔËתµÄ³¡ºÏ £¬¿É½ÓÄɾßÓÐPG·´Ï칦ЧµÄ±äƵÆ÷£¨Ñ¡Óüþ£©¡£

11¡¢Èç¹ûÓôøÓÐPGµÄµç»ú £¬½øÐз´ÏìºóËٶȾ«¶ÈÄÜÌá¸ßÂð£¿

¾ßÓÐPG·´Ï칦ЧµÄ±äƵÆ÷ £¬¾«¶ÈÓÐÌá¸ß¡£µ«ËٶȾ«¶ÈµÄֵȡ¾öÓÚPG×Ô¼ºµÄ¾«¶ÈºÍ±äƵÆ÷Êä³öƵÂʵÄÇø·ÖÂÊ¡£

12¡¢Ê§ËÙ±ÜÃ⹦ЧÊÇʲôÒâ˼£¿

Èç¹û¸ø¶¨µÄ¼ÓËÙʱ¼ä¹ý¶Ì £¬±äƵÆ÷µÄÊä³öƵÂʱä¸ïÔ¶Ô¶Áè¼ÝתËÙ£¨µç½ÇƵÂÊ£©µÄ±ä¸ï £¬±äƵÆ÷½«ÒòÁ÷¹ý¹ýµçÁ÷¶øÌøÕ¢ £¬ÔËתֹͣ £¬Õâ¾Í½Ð×÷ʧËÙ¡£ÎªÁ˱ÜÃâʧËÙʹµç»ú¼ÌÐøÔËת £¬¾ÍÒª¼ì³öµçÁ÷µÄ¾Þϸ½øÐÐÆµÂÊ¿ØÖÆ¡£µ±¼ÓËÙµçÁ÷¹ý´óʱÊʵ±·ÅÂý¼ÓËÙËÙÂÊ¡£¼õËÙʱҲÊÇÈç´Ë¡£Á½Õß½áºÏÆðÀ´¾ÍÊÇʧËÙ¹¦Ð§¡£

13¡¢½ÓÄÉPWMºÍVVC+µÄÇø±ðÊÇʲô£¿

ÔÚVVCÖÐ £¬¿ØÖƵç·ÓÃÒ»¸öÊýѧģÐÍÀ´ÅÌËãµç»ú¸ºÔرä¸ïʱµÄ¸ü¼ÑµÄµç»úÀø´Å £¬²¢¶Ô¸ºÔؼÓÒÔÅâ³¥¡£±ðµÄ¼¯³ÉÓÚASICµç·ÉϵÄͬ²½60¡ãPWMÒªÁì¾ö¶¨ÁËÄæ±äÆ÷°ëµ¼ÌåÆ÷¼þ£¨IGBTS£©µÄ¸ü¼Ñ¿ª¹ØÊ±¼ä¡£

¾ö¶¨¿ª¹ØÊ±¼äÒª×ñÑ­ÒÔÏÂÔ­Ôò£º

1.ÊýÖµÉϸü´óµÄÒ»ÏàÔÚ1/6¸öÖÜÆÚ£¨60¡ã£©ÄÚ¼á³ÖËüµÄÕýµçλ»ò¸ºµçλÎȶ¨¡£

2.ÆäËüÁ½Ïà°´±ÈÀý±ä¸ï £¬Ê¹Êä³öÏßµçѹ¼á³ÖÕýÏÒ²¢µÖ´ïËùÐèµÄ·ùÖµ¡£

ÓëÕýÏÒ¿ØÖÆPWM²î±ð £¬VVCÊÇÒÀ¾ÝËùÐèÊä³öµçѹµÄÊý×ÖÁ¿À´ÊÂÇéµÄ¡£ÕâÄܰü¹Ü±äƵÆ÷µÄÊä³öµÖ´ïµçѹµÄ¶î¶¨Öµ £¬µç»úµçÁ÷ΪÕýÏÒ²¨ £¬µç»úµÄÔËÐÐÓëµç»úÖ±½Ó½ÓµçʱһÑù¡£

ÓÉÓÚÔÚ±äÆµÆ÷ÅÌËã¸ü¼ÑµÄÊä³öµçѹʱ¿¼ÂÇÁ˵ç»úµÄ³£Êý£¨¶¨×Óµç×èºÍµç¸Ð£© £¬ËùÒÔ¿É»ñµÃ¸ü¼ÑµÄµç»úÀø´Å

ÒòΪ±äƵÆ÷Á¬ÐøµØ¼ì²â¸ºÔصçÁ÷ £¬±äƵÆ÷¾ÍÄܵ÷ÀíÊä³öµçѹÓë¸ºÔØÏàÆ¥Åä £¬ËùÒÔµç»úµçѹ¿ÉÊÊÓ¦µç»úµÄÀàÐÍ £¬×·Ëæ¸ºÔØµÄ±ä¸ï¡£

ÉùÃ÷£º²¿·ÖÄÚÈÝÀ´Ô´ÓÚÍøÂç £¬ÈçÇÖȨÇëºǫ́ÁôÑÔÁªÏµÉ¾³ý¡£