Servomotors offer compact design
A
Heason Technology product story
Edited by the Engineeringtalk editorial team
Jun 20, 2007
AST brushed DC servomotors offer acceleration performance over 10x that of conventional iron-cored DC motors.
AST brushed DC servomotors 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 rev/min 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 to 190mm diameter (size 6, 9, 12 and 16) with nominal lengths from 27 to 63mm.
Models are available with standard ferrite or high-performance neodymium iron-boron magnets in power ratings from 30W to 1.0kW (peak torque from 70 to 3500Ncm).
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 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 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 servomotors can also be used where the length of conventional brushed or brushless servomotors 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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