Centrifugal machines are connected to the motor drive directly instead of through a gearbox.

离心机不通过调速箱直接与电机驱动。

This paper resumptively introduces the gist of design of electromagnetism, structure and so on of the large synchronous motor driving mine winder.

矿井提升同步电动机的电磁、结构等方面的设计要点。