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Featured video: Lindemann Rotary
Attraction Motor
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This featured video (found roughly halfway down the page)
demonstrates something called the Lindemann Rotary Attraction Motor,
which sounds a little like a switched reluctance motor. It makes use of
a square-shaped rotor while producing no counter EMF. The motor is able
to recover over 90 percent of its input electricity and boasts that the
sole friction involved is bearing friction.
View the video
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A growing demand for smaller linear motors has led manufacturers to
develop new direct-drive linear servos in response. Machine Design
Associate Editor Bob Repas goes through the equations for specifying
these new motors which use self-supporting 3-phase coils to position a
linear shaft filled with permanent magnets, as opposed to using
leadscrews or belt drives as often used with older rotary
servomotors.
Read the full story
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More features, more machines means
better designs with MotorSolve
 MotorSolve v2
is the right solution for all types of electric machines. The modern and
intuitive interface makes it effortless to design any number of
brushless dc, induction and switched reluctance machines for extensive
analysis. A sophisticated validation mechanism verifies each change to
the global design and guides the user through the creation process.
Request a live demonstration with one of our technical representatives
today! For more information visit Infolytica online.
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The torque-speed curves for any given motor vary greatly depending
on the job the motor is called upon to perform. This article from our
sister publication EC&M goes through comparative graphs for torque speed
and capability, and shows how to spec a variable-speed motor that will
operate best in the intended application.
Read the full story
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The CompletePower motion-control products line powers the company's
PMDC, BLDC, and stepper motors. The drives all have the same form factor
and use identical accessories. The drive family includes three
4-Quadrant brush-type (PMDC) servodrives 11 to 70-Vdc, 18 to 60-A peak
and 9 to 30-A continuous; three 4-Quadrant brushless (BLDC) servodrives,
11 to 70 Vdc, 18 to 60-A peak, 9 to 30-A continuous; two Micro-Stepping
stepper-motor drives, 11 to 70-Vdc, 18 to 36-A peak, and 9 to 18-A
continuous; and two Micro-Stepping stepper-motor drives, 11 to 50 Vdc,
with 5 and 10-A phase currents.
More Information:
ElectroCraft Inc.
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The zero-slip high-efficiency Sinochron motors are rated at 0.25 to
10 kW. The motors eliminate the need for an encoder in medium-accuracy
applications, produce torque equal to the next larger frame size of a
standard ac motor, and deliver 25 to 40% higher efficiency. Enclosed in
an aluminum housing, the motors have a three-phase stator winding with
custom-designed rotor with permanent magnets embedded in the stack for a
perfectly sinusoidal magnetic field and even flux distribution. The
perfectly sinusoidal back-EMF signal from the motor lets sensorless
drive controllers calculate speed and position without an encoder.
Typical accuracy is under 1° when coupled to a gearbox, or
±5° at the motor shaft.
The embedded permanent-magnets produce a higher dynamic for faster
response/acceleration with better speed control. The design also allows
field weakening for overspeed use at lower output torque, while the high
efficiency delivers longer battery life between charges.
More Information:
ABM Drives
Inc.
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Get connected to Machine Design!
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MachineDesign.com
Introducing Engineering TV, an innovative online video
program by engineers for engineers. Twice a week, each 5-8 minute
episode shows cutting-edge technology in
action and looks behind the scenes as today's engineers shape tomorrow's
breakthroughs. Brought to you by the Penton Media Design and Electronics
Engineering groups.
View
Videos
Attention time and information starved engineers
Now you can get a quick dose of literature, product, and digital
information resources right in your copy of Machine Design Magazine.
Look for your edition of Literature Express in the second issue of May
of Machine Design. There you can request product information, catalogs,
CD’s and more from hundreds of manufacturers.
Rev up your interdisciplinary design skills
What happens when a microcontroller turns on a power FET, sending a
current pulse to a motor coil that develops a magnetic field which turns
the rotor shaft, advancing a timing belt that drives a pair of nip rolls
suspended on bearings in a web-processing operation on a form, fill, and
seal machine installed on a potato chip line at a Frito Lay plant in
central California? And how can you be sure that the encoders, prox
sensors, and other feedback devices you plan to use will accurately see
and report every relevant motion, machine state, and process condition?
And will the signals get through the networks fast enough, without being
corrupted, giving the controllers time to execute their algorithms as
intended? It's a lot to think about, and it only scratches the surface
of what many engineers grapple with today. If you happen to be one of
them, then the place for you — where you can find answers and meet
others with similar concerns — is www.Mechatronic-Design.com.
Backed by some of engineering's top information sources including
Machine Design, Electronic Design, Motion System Design, and Power
Electronics, Mechatronic-Design.com is the interdisciplinary engineer's
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Find. Learn. Apply.
Mechatronic-Design.com.
Experience National Instruments Technologies From
the Comfort of Your Own Computer!
 With more
than 200 on-demand webcasts, videos, interactive
tutorials and demos available for users of any experience level, it is
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available from National Instruments.
Begin your search here with a collection of
webcasts specifically chosen for design and automation engineers.
CAD Library offers advanced CAD Resources
The Machine Design CAD
Library, includes millions of configurable 2D and 3D CAD models
of
components and assemblies downloadable for easy use in new and existing
designs. Our models are in native CAD formats. No translation
required!
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Sponsored
by:
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UPCOMING IN-PERSON EVENTS
Design-2-Part Shows are America's longest running and most trusted
events for sourcing custom parts and services.
Ten shows covering the country offer OEMs, engineers and purchasing
personnel the opportunity to meet job shops and
contract manufacturers face-to-face.
UPCOMING WEBCASTS
Architecture Options in Motion Control Design: Chips, Boards, or
Drives
Sponsored by PMD
DATE: June 11th, 2008
TIME: 2:00pm ET/11am PT
Levels of motion component integration often require serious design
consideration during machine and equipment development. A lack of
integration can impact equipment size, assembly costs, and reliability.
Yet expanded integration often affects the costs of components,
manufacturing, and maintenance. It also raises design questions
regarding the selection of motion system components. Obviously, what
the design tries to achieve determines the compromises made. This
presentation investigates and compares the differences between motion
control systems based on chips, boards, or drives; evaluates how each
fits into desired design parameters; and provides a quick understanding
of the factors used to select a level of motion system integration.
Click here to register!
Best Practices in Reducing Production Scrap and Rework
Sponsored by PTC
DATE: June 19th, 2008
TIME: 2:00pm ET/11am PT
Analysts agree that raw materials and labor are the two largest cost
centers for most manufacturers. Production inefficiency can come from
just about anywhere - parts from a supplier that don’t fit into your
finished assembly, a physical prototype you’ve used and then
discarded, or even a delivered product that doesn't meet customer
requirements. In each case, the scrap – along with the rework –
costs you time, money, and reputation. Today's highly compressed cycles
mean manufacturing errors and product-development inefficiencies can
become greatly magnified. But it doesn’t have to be that way. Join
this informative presentation to learn how successful companies are
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Click here to learn more and register!
Supercharging Products with Embedded RFID
Sponsored by SkyeTek
DATE: June 26th, 2008
TIME: 2:00pm ET/11am PT
The power of RFID as a stand-alone application to increase accuracy and
efficiency in supply chain management has garnered much attention in
recent years. The story now is how RFID can be added as a feature to an
almost unending list of products -- adding new functionality, increasing
reliability and enhancing the user experience. They may still look the
same on the outside, but embedding RFID readers and software into
existing and yet-to-be released products can transform them on the
inside offering manufacturers, OEMs and product designers new
opportunities for competitive advantage through increased efficiency,
accuracy and product differentiation.
Click here to learn more and register!
ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click Here for a list of archived Machine Design
webcasts.
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Zero-Max
The new CD couplings feature zero backlash precision and high torsional
stiffness required in today’s demanding servo motor applications with
high reverse loads and positioning requirements. Newly improved CD
couplings are designed with new clamp style hubs for increased torque
capacity on shafts without using keyways.
Now you can select and configure the exact CD® coupling solution for
your coupling application with 3D Partstream, the configurable 3D CAD
downloads at www.zero-max.com
LEESON's new SM2 Vector Series inverters deliver up to 200%
starting torque and control an Inverter rated motor down to 1Hz at full
output torque.
www.leeson.com
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Contact Information
Editorial questions: Robert Repas
216-931-9319
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216-931-9893
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