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Kollmorgen Cartridge DDR™ Direct Drive Torque Motors from Heason
Date: 21 April 2010
Introduced as a completely new category for Kollmorgen's range of direct drive torque motors, the CARTRIDGE DDRT motor is now fully available from leading motion control specialists Heason Technology Ltd.
The innovative and very compact design
includes a hollow shaft rotor, a stator and high resolution
feedback device, all pre-aligned in a bearing-less assembly and
enclosed in a durable housing complete with power and feedback
connectors. The motor is mounted on a prepared bolt-circle on the
customers machine and through a special compression coupling
engages with a solid shaft to directly drive the load which is
supported by its own bearing system.
The innovative CARTRIDGE DDR combines the high performance
advantages of the frameless direct drive motor system with the
convenience of a full frame torque motor at very competitive
pricing and with much simplified installation.
With the torque density for this motor technology rated around 50%
higher than conventional and similar sized direct drive motors,
loads can be driven without the need for gearboxes or other
mechanical transmission components, greatly improving the
performance and power to size potential for demanding servo
applications. Furthermore by removing compliance-prone shaft
couplings and other power transmission components such as pulleys
and gearboxes, any potential for backlash is eliminated and the low
cog design allows for smooth rotation, excellent stability and
positioning precision. The 'mount and run' concept also simplifies
both designing-in and commissioning the motor; and with fewer
components, machine maintenance and spares inventory can be
reduced.
The CARTRIDGE DDR range is available in five frame sizes with
nominal square flange mounting from 138 mm to 350 mm for continuous
torque output from 4.5 Nm to 510 Nm and speeds to 2500 rpm.
In the larger frame sizes, the through shaft rotor can include a
continuous bore which may be useful for providing machine cabling,
slip rings or other services. The range is CE marked and UL-listed
for global use with voltage ratings at 240, 400 and 480 V and
maximum continuous current for the largest motor at around 33 Amps
. The range includes an absoloute sine encoder system with a
maximum resolution of over two million counts per rev.
Heason Technolgy provide a complete technical and support service
for the new CARTRIDGE DDR torque motor including drives and motion
controls such as the Kollmorgen Ethernet-based AKDT servo drives.
This range perfectly complements the high performance
capability of the new direct drive motors equally suiting simple
single-axis indexing through to fully synchronised multi-axis
position control.