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AST Disc Armature Brushed DC Motors
Date: 21 June 2007
These motors outperform conventional iron cored designs
*Range of disc armature DC servo motors
offer excellent characteristics for high performance motion
applications.
*Exceptional dynamic performance and compact design keeps this
servo motor technology in demand.
AST brushed DC servo motors use ironless disc armature technology
for exceptional speed and rapid positioning performance in a very
compact design. Available from Heason Technologies, these
zero-cogging, "flat" motors have minimal inductance, near full
torque throughout the rated speed range and a high current overload
capability that allows instantaneous, sub-millisecond torque for an
acceleration performance over 10x that of conventional iron-cored
DC motors. The low inertia motor design has an unparalleled
torque-to-inertia characteristic and a typical move from standstill
to 3000 rpm can be achieved in only 45 degrees of motor rotation.
Low inductance also results in much longer brush life than iron
cored motors.
The complete range covers four frame sizes from around 90 mm to 190
mm diameter (size 6, 9, 12 and 16) with nominal lengths from 27 mm
to 63 mm. Models are available with standard ferrite or high
performance neodymium iron-boron magnets in power ratings from 30 W
to 1.0 kW (Peak Torque from 70 Ncm to 3500 Ncm). Integrated tachos,
optical encoders, failsafe brake and precision gearheads are all
available as standard.
A ruggedised version with a heavy duty cast aluminium housing is
also available for use in applications such as radar, tracking and
navigation systems, CCTV camera control, mobile machinery, and
mobility equipment. Other applications areas for the range include
industrial control robotics, stage lighting, remotely controlled
devices, transcription quality recording systems, and winding
machinery.
The highly efficient motor design is also suited to battery powered
and vehicle based applications where low voltage versions are
available.
This well-proven technology is used for demanding motion control
applications where ultra-precise, smooth speed control or fast
incremental moves with rapid settling times are of prime
importance. Flat disc servo motors can also be used where the
length of conventional brushed or brushless servo motors can be a
problem - the flat pancake design is ideally suited for use with
flat high ratio reduction gear systems also available from Heason
Technologies.
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information on this exciting product.