描述
直流電機的電刷和體積的原因，限制了它的應(yīng)用范圍，變頻調(diào)速可以說是由風(fēng)機和水泵發(fā)展而來的，是由于風(fēng)機和水泵節(jié)能的需要，變頻調(diào)速是最佳選擇，不過我個人認(rèn)為就目前電價和變頻器的自身的價格相比，這種節(jié)能是毫無意義的，因為要把變頻器的投資收回，最少需要5-6年，在這5-6年的時間里，工況還不知道要發(fā)生什么變化。因此，變頻器最好應(yīng)用在需要調(diào)速，而對啟動性能及力矩調(diào)節(jié)要求不是很苛刻的場合，而這種場合比比皆是，這才是變頻調(diào)速普遍應(yīng)用的原因。因此可以說如果用直流調(diào)速控制器去控制交流電機那才是最好的，真能做到這一點，目前還很困難。
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