Easy installation for direct-drive motor

Edited by the Engineeringtalk editorial team Jul 30, 2004

The Danaher Cartridge DDR motor is the first in the industry to combine the space saving and performance advantages of frameless DDR technology with the ease of installation of a full frame motor.

The Danaher Cartridge DDR motor now available from Micromech is the first in the industry to combine the space saving and performance advantages of frameless DDR technology with the ease of installation of a full frame motor.

Consisting of a rotor, stator and factory-aligned high-resolution feedback device, the motor uses the machine's bearings to support the rotor.

An innovative compression coupling engages the rotor to the load and the frame of the direct drive mounts to the machine with a bolt circle and pilot diameter just like a conventional servomotor saving space and design time and simplifying the overall system.

The motor does not have bearings as it mounts to a machine using the machine's existing bearings to support the motor's rotor.

The frame of the motor mounts to a pilot and bolt circle on the machine frame much like a conventional motor.

This brings a quantum leap in cost effectiveness and ease of application when compared to any other direct drive configuration.

Up until now there was months of engineering and days of installation of a frameless motor and feedback device, the Cartridge DDR however just requires a simple shaft and pilot configuration and less than 30 minutes from shipping container to operation.

Features include: two frame sizes, 246 and 350mm; three stack lengths in each frame size; continuous torque from 50 to 510Nm; peak torque from 120 to 1017Nm; an absolute position sine encoder with maximum resolution of 2,097,152 counts per revolution; and UL and CE agency certifications are standard.

A high-energy permanent magnet brushless DC configuration using a proprietary electromagnetic design gives the direct drive motors up to 50% more torque per volume than conventional DDR technology.

Thanks to this novel arrangement a significantly broader range of motion applications will benefit from the performance and reliability advantages of direct drive.

As the motor is directly connected to the machine, inertial matching is not required as it is on a conventional motor.

With direct drive, inertia mismatch of 250:1 is common and mismatch of 800:1 has been implemented.

The Cartridge DDR motor can be mounted with any orientation including either a horizontal or vertical shaft.