Eddy Current & AC DYNO mite Absorber s |
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(603) 329-5645 |
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DYNOmite Eddy Current Absorbers offer very quick load control, moderate inertia, and high specific load capacity, especially in the lower RPM working ranges of most industrial type engines. For applications that do not require stall speed loading, an air-cooled eddy current absorber is usually the most cost effective electric absorber you can buy. Their self-cooled rotors require no external water supply or resistor banks. They also cost less than planetary driven water brakes and allow far more design flexibility than hydraulic pumps. For applications that demand higher RPM limits, lower system inertia, and/or temperature independence, we offer (slightly more expensive) water cooled eddy current absorbers.
AC
(Alternating Current) Absorbers
deliver the ultimate in electronic load control. Besides lightning fast
response, they are able to provide full torque loading all the way down to zero RPM (which
is especially useful for testing electric motors).
Most of the AC applications can also be designed to “motor” the test engine - in
addition to providing a convenient way to start the engine, motoring allows
testing its frictional cranking loads. For very low Hp capacities, heat
dissipation can be internal. Moderate power applications may dissipate their
energy into external resistive load banks. For higher output (up to 1,250 Hp) a
regeneration system that sends power back to the utility’s grid (often for a
credit on the user’s electric bill) can be custom engineered.
Battery powered (12-volt DC) eddy current absorbers are available for in-field service applications. Everything, including the absorber, load control, and DYNOmite Data Acquisition Computer, can be run off of a large truck battery. Combine this with your laptop computer, running DYNO-MAX 2000™ software, to run a laboratory like dynamometer test session… almost anywhere on the planet.
120-volt and 240-volt (input)
power supply/controls
are available to provide 96 or 192-volt DC PWM (pulse width modulated) output – suitable for many DYNOmite or third party absorber models. Loading when
using these controls is adjustable either manually (using either their panel
knob or 0-10 volt analog control input) or automatically via our DYNOmite Data
Acquisition Computer’s PID digital output. Built-in panel circuit breakers are
matched to the customer’s application, protecting the absorber’s windings.
Perfect for torque reaction cradles where the higher inertia of an electronic absorber (compared to a water brake) is not an issue. Our “Micro” and “Mini” DYNOmite Eddy Current Absorbers are equipped with an eccentric cam mounting body that helps to easily adapt them to changes in drive gear, pulley, or sprocket center distances.
Shaft,
Flange, or NEMA Frame mounting choices are
offered for specific models. Keyed shaft units are commonly supported between a
pair of pillow block bearings. This allows reading the reaction torque via a
load cell linked to the absorber’s trunnioned frame. Alternatively, optional
flat flanges couple with matching bolt-pattern
driveshaft U-joint assemblies. Larger absorbers have mounting holes in their housings for fixing
them to the dynamometer’s frame or cradle.
AC absorbers are available in
standard NEMA frame and input shaft configurations.
Custom hybrid configurations can be designed using a combination of both an electronic, typically AC, absorber (for fast torque control) and a large water brake (for inexpensively adding very high Hp capacity). Control of the pair is via DYNO-MAX 2000 “Pro”. While their complexity is only justified for some sophisticated high Hp applications, hybrids make it possible to cost effectively build lower inertia and faster response dynamometers, (with motoring capabilities) than can be had using any single braking technology alone.
High
speed spindle bearings and grease seals
provide long life for extended OEM and industrial endurance testing
applications. Our larger eddy current absorbers feature Zerk grease fittings
for easier maintenance, and AC models boast sophisticated monitoring protection.
Replacement bearings and seals are available locally, and they’re engineered for
convenient field replacement. These features are combined into a design which
minimizes the number of moving wear parts, rendering expensive downtime a
non-issue.
Call for immediate assistance in developing your own unique testing solution - or e-mail tech@land-and-sea.com for a prompt response.
Free
DYNO-MAX 2000™ "Pro" Demo Tour
Free DYNO-MAX 2000 "Pro+" Multimedia Demo Tour... shows how our optional software turns any PC or Laptop into a dynamometer console! Demonstrates real-time engine displays and controls, Formula Editor, graphing of multiple pulls, and Smart Print™ engine report generation. Either download this interactive demo online, or call and we will mail it to you on CD-ROM.
