Machine or machine section with at least one electric motor for direct driving a core of a winding reel, in particular for application in the paper industry

摘要

Machine or machine section has hub (108). The electro-motor can be operated or implemented as synchronous motor (12) and a hub can be assigned under normal operating conditions in the first operating phase of the first electro motor, it's rotor or rotary drive connection is coupled essentially play-free with the hub directly or rotary drive connection with rotary drive connection. The hub can be assigned under normal operating conditions in the second operating phase of the second electro motor so that its rotor or the rotary drive connection coupled essentially backlash-free with the hub directly or rotary drive connection. In the transition phase of the rotor or rotary drive connection of first electro motor from hub can be detached and the rotor or rotary drive connection of the second electro motor can be coupled with the hub, preferably such that in partial phase of the transition both the electro motors can be coupled with the hub.