XYCOM PM101229
XYCOM PM101229风机、水泵都属于减转矩负载,即随着转速的下降,负载转矩与转速的平方成比例减小,而具有节能控制功能的变频器设计有V/f模式,这种模式可改善电动机和变频器的效率,其可根据负载电流自动降低变频器输出电压,从而达到节能目的,可根据具体情况设置为有效或无效。
要说明的是,电子热过载保护和频率限制这两个参数是很先进的,但有一些用户在设备改造中,根本无法启用这两个参数,即启用后变频器跳闸频繁,停用后正常。 究其原因有:①原用电动机参数与变频器要求配用的电动机参数相差太大。 ②对设定参数功能了解不够,如节能控制功能只能用于V/f控制方式中,不能用于矢量控制方式中。 ③启用了矢量控制方式,但没有进行电动机参数的手动设定和自动读取工作,或读取方法不当。
XYCOM PM101229
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