Tech Briefs Magazine - August 2021 - MD-2

Long-life electric actuators have
created a new, affordable solution
for automated guided vehicles
(AGVs) that can run all day
and night and perform frequent
linear motion tasks. (Photo courtesy
of Thomson Industries, Inc.)
Making
High-Duty-Cycle
Industrial Automation
Affordable
raditionally, linear motion system
designers implementing high-dutycycle
motion had to choose among
hydraulic, pneumatic, and electromechanical
systems. Each technology
did the job but came with specific limitations
relative to the support infrastructure
required to drive/control them.
This can include frequent maintenance
or high upfront costs for things like
servo drives/encoders, compressors, and
hydraulic power units as well as accessories
and piping installations.
T
2
Cov
ToC
Now, a new generation of long-life electric
linear actuators has emerged to give
designers more flexibility for high-dutycycle/lower-accuracy
motion in applications
for which traditional actuators were
previously cost-prohibitive or substandard
in their duty cycle ratings/abilities.
Actuator Selection
Actuator life is a function of its duty
cycle, i.e., the percentage of time it can
apply to its work, as calculated by the following
equation:
Duty cycle (%) = (actuator on-time)/
(on-time + off-time)
So, if the actuator operates for 15 seconds
and then rests for 45 seconds during
a 1-minute cycle, its duty cycle is calculated
as: (15 s.)/(15 s. + 45 s.) = 15/60
= 0.25 or 25%.
Manufacturers issue duty cycle guidelines
to help keep the actuator at rest
long enough to prevent the motor from
overheating and damaging actuator components.
Duty cycles for hydraulic and
pneumatic actuators tend to be in the
Motion Design, August 2021

http://www.abpi.net/ntbpdfclicks/l.php?202108MDNAV

Tech Briefs Magazine - August 2021

Table of Contents for the Digital Edition of Tech Briefs Magazine - August 2021

Tech Briefs Magazine - August 2021 - Intro
Tech Briefs Magazine - August 2021 - Sponsor
Tech Briefs Magazine - August 2021 - Cov1
Tech Briefs Magazine - August 2021 - Cov2
Tech Briefs Magazine - August 2021 - 1
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Tech Briefs Magazine - August 2021 - Cov3
Tech Briefs Magazine - August 2021 - Cov4
Tech Briefs Magazine - August 2021 - MD-Cov1
Tech Briefs Magazine - August 2021 - MD-Cov2
Tech Briefs Magazine - August 2021 - MD-1
Tech Briefs Magazine - August 2021 - MD-2
Tech Briefs Magazine - August 2021 - MD-3
Tech Briefs Magazine - August 2021 - MD-4
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Tech Briefs Magazine - August 2021 - MD-Cov3
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