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EE&T News: September 27, 2010

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September 27, 2010 Issue:

More efficient lighting thanks to magnetic energy recovery switch

Modeling wind-turbine gearboxes

No more Energy Star for external power supplies

LED targets distributed lights

Energy shorts

Battery charger for portables

Gear reducer operates at 90% efficiency

Terminal block for Evs, inverters



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More efficient lighting thanks to magnetic energy recovery switch

The MERS is basically a four-transistor active snubber circuit that effectively synthesizes a tunable capacitor. When hooked up with an external inductor, one of the uses of the device is to adjust circuit power factor. When used with fluorescent lamps, the MERS can function as a dimmer. ONR Global funded a series of experiments at Tokyo's Hardy Barracks Installation earlier this year to evaluate how well the MERS lighting controller saved energy. READ MORE


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Boker's Free 2010 Washer Catalog
Boker's complimentary 2010 Washer Catalog features more than 24,000 non-standard flat washer sizes available with no tooling charges. Outside diameters of 0.080" to 5.140", a broad range of IDs and thicknesses, as well as 2,000 material options provide endless possibilities. Materials include low-carbon sheet steel, various spring steels, stainless steel, aluminum, brass, copper, nickel silver and non-metallics. ISO 9001:2008 Registered
www.bokers.com/eete

Modeling wind-turbine gearboxes

Gearboxes in general are a result of over 80 years of accumulated engineering knowledge. So why do gearboxes for wind turbines sometimes fail after seven to 11 years — way less than the anticipated 20-year design life of the entire turbine structure? This is a complex question with many variables to consider and no easy answer. For example, it was once thought there was an incomplete understanding of the loading conditions the gearbox sees as it suffers high torques from blades subjected to gusty winds. READ MORERead More

No more Energy Star for external power supplies

External power adapters have come a long way in energy efficiency, so much so that effective December 31, 2010, they'll will no longer be eligible for the Energy Star label, say EPA officials who administer the program. External power adapters come with products like digital cameras, cordless phones and cell phones. EPA figures there are about nine external power adapters for every person in the U.S. – as many as 2.7 billion in total. READ MORERead More

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BEI Releases Second Edition of Industrial Encoders for Dummies
Select and install encoders correctly for trouble-free performance with BEI Sensors’ newly updated Industrial Encoder for Dummies 2nd Edition. This edition features new sections including in-depth explanations of resolution vs. accuracy, natural binary vs. gray code, and how to choose an encoder for your specific needs. Additionally this 44 page book will help you recognize which encoder features really matter, discover the lingo of encoders and understand potential electrical and environmental problems so you can avoid common pitfalls.
www.beiied.com/dummies

LED targets distributed lights

LED maker Cree, Inc.has come out with a half-watt LED dubbed the XLamp ML-E LED targeting Energy Star-compliant distributed lighting. The XLamp ML-E aims at applications where a smooth, uniform appearance is needed, such as LED fluorescent tube replacement, ceiling-mounted panel lights and under-cabinet lighting. READ MORERead More

Energy shorts

Online software simplifies and speeds lighting design
Something new: From carbon to Light sweet crude
Electric vehicle with a wireless twist
Energy savings via smart meters are elusive
Low-power sensor data over power linesRead More

NEW PRODUCTS

Battery charger for portables

The MAX8895 linear battery charger for Bluetooth headsets and portable devices integrates automatic adapter detection and USB enumeration for charging without system software or an external microcontroller for stand-alone charging.
The unit's Smart Power Selector provides seamless distribution of power from the USB power input (VBUS) to the battery and system load for simultaneous charging of the battery while powering the system, as well as operation of the portable device with a discharged battery or no battery. The battery supplements VBUS when the system load exceeds the VBUS input current limit.
The charger features a battery-disconnect switch, current-sense circuit, thermal-regulation circuitry, MOSFET pass elements, and overvoltage protection up to 16 V. Flexible programming options include fast-charge current, termination current, and charge-timer duration. The MAX8895 also supports adaptive battery charging, which reduces charge current when necessary to prevent the charge source from collapsing.
Two USB options are available. The MAX8895X (low speed) and the MAX8895Y (full speed) operate from a 4.0 to 6.6-V supply. The MAX8895 is specified for –40 to 85°C.
Maxim Integrated ProductsRead More

Gear reducer operates at 90% efficiency

The IronMan E Series gear reducers operate at 90% efficiency. The gear reducer’s compact housing design lets it directly replace traditional worm-gear reducers. Helical-bevel gear technology provides the unit with 60% more torque than conventional worm-gear designs.
Mounting kits let the E Series replace multiple sizes of worm-gear speed reducers. Shaft kits ranging from 1 to 1½ in. are designed to plug into a standard hollow-output shaft.
Four models are offered, with double reduction ratios from 7.8:1 to 60:1 and power capability to 8.50 hp. Triple reduction units are available by adding a ratio multiplier. Features of the gear reducer include synthetic lubricant, covers sealed with O-rings, and Viton double-lip seals.
Grove GearRead More

Terminal block for Evs, inverters

The 828 Series feedthrough terminal block provides tool-free, maintenance-free, through-panel terminations for control-panel applications such as motor-control centers, UPS systems, and electric-vehicle charging stations. UL Certified for 600 V/40 A, developed for alternative-energy inverter systems, aids in the separation of field-wired power-input connections from sensitive electronics by simplifying conductor passage through enclosure walls. This creates subpanels where power input connections can be made outside the protected area of enclosures or control panels. The block uses Cage Clamp spring pressure-connection technology to simplify terminations. Users lift the lever, insert a stripped conductor (16-6 awg) into the termination port, and lower the lever.
The single-piece device simplifies panel openings and eliminates alignment issues during panel assembly. An integrated lockout feature accommodates a security seal or tagout marker, preventing unauthorized access to external terminations. A panel gasket seal provides a splash-resistant enclosure seal for additional protection and reliability.
Wago CorpRead More

FEATURED LINKS

New High-Efficiency Motors from SEW-EURODRIVE
SEW is excited to announce the new efficient DR Motor series. This modular system of AC motors is available in three efficiency levels: standard, high-efficiency and NEMA Premium® efficiency. The modular DR motor offers a single series with millions of drive combinations; other customizable options include brake size, cost-optimized encoders, and mounting type. All three models comply with worldwide efficiency and energy standards. Visit www.sewmotortruth.com.
Today, the pressure to increase sales by bringing high-performing products to market quickly and within budget is intense. At Norgren we understand this pressure and constantly innovate to provide world class products and services, bringing real value to our customers and helping differentiate them from the competition. Applying the best engineering, innovation and technical know-how to generate value for our customers is what we know as “Engineering Advantage”
www.norgren.com/usa

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