Indramat develop frameless motors further

Citation

(1998), "Indramat develop frameless motors further", Assembly Automation, Vol. 18 No. 1. https://doi.org/10.1108/aa.1998.03318aaf.005

Indramat develop frameless motors further

Indramat develop frameless motors further

Indramat have developed frameless motors further to offer new solutions to precision motor systems. By incorporating recent technological advancements, such as new cooling techniques and more precise feedback devices, while expanding use of CAD, Indramat have extended the popularity of frameless motors into more registration-oriented operations such as paper converting and printing.

New feedback devices provide resolutions greater than 1/2,000,000th of a revolution and are suitable for direct mounting on a frameless motor. This new capability greatly extends applications for all types of motors. Innovative motor cooling methods have been developed. Among them, fluid cooling is highly efficient, enabling a compact motor to deliver high power.

Today's new generation of frameless motors offers considerable advantages to the design engineer. One of the most important advantages is the increased stiffness delivered to the entire machine. On frameless motors, the shaft diameter can be approximately three times greater than that of a conventional motor, thus giving 27 times more stiffness. This higher level of stiffness is particularly beneficial for today's most advanced converting machines with electronic line shafting (ELS). Such designs eliminate the long mechanical line shaft and the numerous mechanical attachments that have traditionally connected the machine sections together.

The latest frameless motors can also incorporate a shaftless rotor with a bore through it or with a hollow shaft, offering machine builders the freedom to configure a variety of shafting options. Frameless motors enable bearing structures to be tailored to the precise needs of each machine design and application. High speed applications can use a structure that minimizes bearing heat while low speed applications can be designed to handle large radial or axial loads.

New range of frameless motors from Indramat

Two direct-coupled frameless motors power die-cutters in a corrugated cardboard converting machine

Frameless motors are also more compact and quieter. Excluding bearings, external shaft and mounting frame, frameless motors can be one-seventh the volume of conventional framed motors with the same power rating. The elimination of gear train and motor blower considerably reduces noise levels. Today's frameless motors have high torque capability, typically having continuous torque ratings from 6Nm to 1100Nm with speeds from 300 to 20,000 rpm.

Indramat is a division of the Mannesmann Rexroth Group. For further information. please contact: Mannesmann Rexroth Limited, Indramat Division, Broadway Lane, South Cerney, Cirencester, Gloucestershire GL7 5UH. Tel: 01285 863000; Fax: 01285 863003.