Legislation introduced in the senate sets up a Crush for
Credit program that would give a $25/hp federal rebate to replace
inefficient motors with ones rated as NEMA Premium energy-efficient. It
also provides for a $5/hp rebate for the proper disposal of less
efficient motors that one can assume means recycling the materials of
the older motor. The legislation was proposed by Sen. Blanche Lincoln
(D-AR) as S.3436. The proposed funding of the program was capped at $700
million. We’ll keep you informed as this legislation works its way
Of course, you should be working your way through the questions in our
Design Engineer contest. Our May winner of a $250 Amazon gift
card was Steven Ho, aka chemicalengineer in the game. So far, all of our
players have answered over 350,000 questions covering eight subject
categories. Interestingly, one of our most popular categories also
appears to be one of the most challenging: Mechanical Engineering. It
shares its popularity rating with All Things Energy and its difficulty
rating with Hydraulics & Pneumatics. The monthly competition begins anew
on July 1, with the July prize to be a $250 gift card from Dick's
-- Bob Repas, Assoc. Editor
In this issue of Electric Motors Monthly:
Let us know what's happening in your area via the MACHINE
DESIGN Blogs, LinkedIn,
Twitter, and Facebook
accounts, or visit the virtual MD
Office in Second Life.
Motion-system designers frequently crank pretty hard on servomotors.
To get the highest possible performance, they’ll often command the
servomotor to put out the maximum peak torque that its maker allows.
However, servomotor electrical windings can overheat rapidly and even
burn up when this happens. Consequently, a servomotor needs a hot-spot
temperature safety margin.
The Cyclemotor kit from Neodymics, Madison, Wis.
(www.neodymics.com), can turn any standard 26 or 27-in. bicycle into a
1-hp moped that can cruise at up to 28 mph. The one-piece kit contains
all that is needed for the conversion, including batteries,
brushless-hub motor, transmission, drive electronics, controls, and a
shock absorber and simple suspension. All the components are assembled
into a single 40-lb unit that attaches via three quick-release latches
to the front fork of the bike, replacing the front wheel with a 16-in.
powered wheel. Most of the 40 lb are mounted low, so the center of
gravity, along with handling and stability, improves.
Emergency-stop switches, generally referred to as E-Stops, help
ensure the safety of people and machinery by delivering a consistent and
predictable fail-safe response. A wide range of electrical machinery
need these specialized switches to meet workplace safety and established
international and domestic regulatory requirements. E-Stops differ from
simple stop switches that merely turn equipment off in that they offer
foolproof equipment shutdown.
Wimbledon’s retractable roof now consists of two sections opening
north and south. A total of 10 trusses in the two sections span 77 m
(253 ft) over Centre Court and support 1,586 m2 (17,060 ft2) of fabric.
A wheeled carriage or “bogie” at each end of the 110-tonne (121-ton)
trusses rolls along two sets of parallel rails to move the roof section.
Overall, 40 bogie motors, two on each of the wheeled carriages, position
the roof trusses. Overall, the retractable roof has 148 axes of control
using 20 real-time Moog servo controllers and 20 PLCs housed in 40
Robots taking over the Georgia Dome in a battle for world
domination? It’s not a summer blockbuster; it’s the FIRST Robotics
Competition Championship. This year’s competition in Atlanta, April 15
to 17, was the culmination of a three-month season for more than 45,000
students from 12 countries. Starting in January, student teams designed
and built robots that would compete both with and against other teams’
robots for top honors.
Scott Carlberg demonstrates Yaskawa's vibration suppression
algorithm used in its motor drive systems to Lee Teschler of MACHINE
DESIGN. Length: 3:39
Two new brushless flat-dc micromotors provide diameters of 15 and 26
mm. The precious-metal commutated micromotors have nominal voltages of 6
or 12 V. The 15-mm-diameter model provides a 0.6-mNm continuous output
torque, while the 26-mm-diameter version offers 3.8 mNm. The output
torque can be increased up to 30 or 100 mNm with gearmotor versions of
the new drives.
The 1FT7 family of high-performance servomotors provides short
machine cycles through a 30% shorter design and 4× overload capacity
over previous servos. Vibration-insulated encoder mounting lets users
exchange the encoder in the field in less than 5 min, without encoder
alignment. High-resolution encoders, currently up to 22-bit, make these
servos highly precise.
Siemens Industry Inc., Drive Technologies — Motion Control
The all-in-one electric ICR SmartActuator (programmable digital
drive, servomotor, and actuator) is a linear rod-style actuator with a
reverse-parallel-mounted motor that delivers up to 720 lb of force for
speeds to 5 ips or 150 lb of thrust at speeds to 23 ips. The ICR is
stroke-configurable up to 24 in. The motor mounts on top, instead of
in-line, to reduce overall actuator length.
The M-660 is a new 0.6-in. profile, direct-driven, high-speed rotary
stage based on the company’s PILine piezomotor drive technology. The
stage reaches speeds of 720°/sec and resolution to 40 µrad (8 arcsec).
The unit’s self-locking ceramic drive holds the position steady at
rest, with no energy consumption and heat generation.
Physik Instrumente LP
ENGINEERINGTV.COM IS ALL NEW!
The video site for engineers, EngineeringTV.com has been completely
redesigned and relaunched with an entirely new look and enhanced
functionality. Browse video libraries on specific technology topics or
browse by company brands, by tradeshow, or even by publication-specific
video “playlists.” It is all the same quality editorial content and
cutting-edge technology videos, but with better usability. Check it out
Machine Design's WORLD'S
SMARTEST DESIGN ENGINEER
Players from across the globe are
competing for fun, education, prizes and the ultimate bragging rights.
Thanks to our sponsors for their support of the exciting online
opportunity for engineers! Play
Bimba Manufacturing Company
Forest City Gear
Maxon Motor USA
R+W America L.P.
Smalley Steel Ring
W. L. Gore & Associates
Using Current Sensors in Motor Drives, Power Inverters
DATE: July 7th, 2010
TIME: 12:00pm ET/9am PT
Learn about Avago's solution for sensing motor current and transmit
signals from high voltage motor phases/rails to the control circuit for
your next design. Our Isolation amplifiers, working in conjunction with
shunt resistors, provide accurate current measurements in power
converter applications in the presence of high switching noise. These
devices include a built-in A/D converter and robust optical coupling
technology to achieve high gain accuracy and common mode noise
Click here to learn more and register!
ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Here for a list of archived Machine Design webcasts.
With over 30,000 custom designs and experienced application and design
engineering support, LEESON can react quickly to your production &
INTEGRATED LOAD CELL ACTUATORS
Available in a variety of configurations, Myostat`s integrated load cell
actuators are ideal for light assembly and touch screen quality
Thank you for reading the Electric Motors Monthly Newsletter from
This email was sent to #email#. You've received this e-newsletter for
one of two reasons:
1) You signed up for it on one of our web sites.
2) You are a reader of Machine Design magazine.
Manage Your Subscription
To quickly unsubscribe from this newsletter, click here Unsubscribe
To subscribe or unsubscribe, to this or any of our newsletters, visit our subscription page.
To CHANGE YOUR EMAIL ADDRESS, visit our subscription page, login with your
old email address, then change your address.
Editorial questions: Robert Repas
Advertising/sponsorship opportunities: Virginia Goulding
1300 E. 9th St.
Cleveland, OH 44114
©2010 Penton Media, Inc. All rights reserved.