闭式星三角启动方式在船用大电机上的应用研究

Application of Closed Y-Δ Transformation in Starting a Large Marine Motor

星三角启动由于结构简单,成本较低,在鼠笼型电机需轻载降压启动的场合得到了普遍的应用,但该启动方式在由星形接线向三角形转换的过程中,会产生二次冲击电流,有可能造成电动机启动失败。介绍一种改进型的闭式星三角启动方式,可很好解决这一问题。

The star-delta starter is widely used for starting squirrel-cage motors under light load and reduced voltage, because of its simple construction and lower cost. But during the switching process from star connection to delta connection, it would pro- duce secondary inrush current and cause a starting failure. This paper introduces an improved design called closed-star-delta starter to solve the issue. This design is valuable for large marine motors.