motor-driven

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

离心不通过调速箱直接与电驱装置。

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

括了矿井升同步电电磁、结构等方面设计要点。