Assembly, operating method and circuit for a mill driven by a ring motor

US9321054B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Harald Held · Haar, DE
• Michael Metzger · Borgo San Lazzaro, DE
• Florian Steinke · Munich, DE

Key dates

• Filing date: Jun 30, 2011
• Grant date: Apr 26, 2016
• Expiry date: Mar 28, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B11/01
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An assembly is provided for receiving characteristic data of a mill including a rotating mill sleeve having rotor coils and a stator having stator coils, wherein oscillations of the mill sleeve are transmitted to stator coils and/or measurement coils on the stator. The assembly may include stator coil(s) configured to tap power supply induction voltages to detect oscillations of the mill sleeve, wherein the stator coil(s) and/or measurement coil(s) designed to tap induction voltages are positioned in a sector of the mill sleeve in which large oscillations are expected based on the scale of the mill sleeve. Further, a method includes determining the induction voltage induced on stator coil(s) and/or measurement coil(s) by tapping at least one stator coil power supply and/or by tapping at least one measurement coil, and deriving status variable(s) of a milling method that reflect the fill level status in the sector of the respective coil.