380V的异步电机把星形接法改成三角形接法,用220V的变频器带动,输出的功率和转速会有什么不同?
当然,变频器功率大电机的一个级别.
人气：479 ℃ 时间：2019-10-18 16:46:13
解答
三相380V的异步电机若原来为星形接法,那其各相绕组承受的就是相电压220V,而电机的I线=I相,电机功率P=3*I相*U相*Cosф*η = √3*I相*U线*Cosф*η = 660*I相*Cosф*η.若用输出为三相220V的变频器控制,必须改为三角形...
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