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EE&T News
The latest news in energy efficiency
December 7, 2011

Goodbye to lead-acid batteries?
Superchargers go electric
Sensor/control networks will check energy usage
More efficient refrigeration with copper tubes
Energy shorts
Next-gen LEDs hit 80 lumens/watt
Tutorial video: LEDs and light pipes
Low-power d-a converters
Energy-efficient electric slide

Goodbye to lead-acid batteries?

As we finish up the Nov.-Dec. issue of EE&T, some industry watchers are predicting the slow end to lead-acid battery technology. That's just one story you'll find in print edition hitting the streets soon. Meanwhile, send your energy efficiency news to us here at eeteditor@penton.com. -- Leland Teschler, Editor

Featured Content

Superchargers go electric

There are a lot of talking points in favor of a supercharger based on an electric motor: There's no turbo lag and the supercharger delivers a lot of power at low engine speeds. That low-end performance often lets a smaller engine take the place of a a larger one.


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ION Modbus RTU I/O Modules
Electro Sensors' ION Modbus Nodes are available with 12 analog input or 6 discrete inputs/outputs, making them ideal for remote data acquisition and machinery control applications. Input and sensor power terminals are mis-wire and short-circuit protected. Directly connecting with PLCs, touchscreens and PCs, this device offers a high data throughput, with less than 1 mS latency. The pluggable terminal blocks offer simple installation, while the LED status indicators deliver clear visual status of power, communication, internal fault and communication faults. www.electro-sensors.com

Sensor/control networks will check energy usage

Users of industrial sensor networks such as ControlNet will soon get the ability to check on the energy use of devices connected into such networks. The industrial network standards organization ODVA has devised an energy object feature for network communications that facilitates the collection of data about energy usage or generation.

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Boker's 2012 Washers Catalog
Boker's complimentary 2012 Washer Catalog offers a selection of more than 26,000 non-standard flat washer sizes available with no tooling charges. With outside diameters ranging from 0.080" to 5.140", a wide variety of inside diameters and thicknesses and over 2,000 material options available, Boker's provides endless washer and spacer 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

More efficient refrigeration with copper tubes

The road to more efficient cooling could involve increased use of copper tubing, says the International Copper Association. One reason: copper tubing is more compatible with eco-friendly refrigerants coming into use than some of the alternatives, and copper tubes can be small thanks to copper's high thermal efficiency.

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Energy shorts


Simulation brings efficiency to electromagnetic design
Asymmetrical lenses suit LED lighting
Thin LED lamps for auto interiors
Multimeters use OLED displays

LED Lighting

Next-gen LEDs hit 80 lumens/watt

ED maker Cree Inc. is touting its new LMH2 as the only LED module delivering 80-lumens/W system efficacy combined with CRI greater than 90. No question that designers are increasingly looking at color rendering index when specifying solid-state lighting. As a quick review, blackbody radiation is defined as having a CRI of 100. Incandescent lamps have a CRI of 100 as they are, in effect, almost blackbody radiators.

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AC Industrial Fan Series, at Digi-Key
NMB offers a series of oil proof and dust proof, long-life AC fan motors for products used in harsh environments such as machine tools and inverters. Also, they are well suited for products used outdoors such as solar light generation systems. The weather-resistant series, which is designed for low noise, high flow, and high pressure applications, is available in three sizes: 80 mm x 25 mm, 119 mm x 38 mm, and 150 mm x 172 mm x 38 mm. www.digikey.com

Tutorial video: LEDs and light pipes

Combine an LED with a light pipe and you often get an interesting mode of illumination that can distinguish a product from its competitors. Experts at Elma Electronics discuss how light pipes are constructed, typical applications configurations, and things to look out for in this short video.

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New Products

Low-power d-a converters

The DAC-12100 Series of low-power, 12-bit digital-to-analog converters have TTL/CMOS compatible inputs. The devices have a 100-MHz conversion rate and are suitable for radar, signal reconstruction, waveform generators, and communications equipment.
The converters have a low glitch-energy characteristic of 3.0 pV-s, compared to the industry norm of 100 pV-s, so they generate little switching noise. Complementary current outputs of 0 to –20.48 mA can directly drive 50-Ù loads. Dynamic performance, to Nyquist at fOUT of 2.02 MHz, provides a free dynamic range specification of - 85 dB.
The converters use R/2R resistor networks and segmented switching current cell arrangement to reduce glitch energy. The resistor network is laser trimmed to give it 12-bit linearity to within 0.5 LSB across the transfer curve.
Datel

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Energy-efficient electric slide

The energy-efficient EGSL Series electric slide, for pick-and-place systems or planar surface and 3D gantries, operates with linearity and parallelism to an accuracy of 0.0006 in. (0.015 mm).
The slide provides positioning for strokes of up to 11.8 in. (300 mm). An enclosed ball screw prevents dirt or small workpieces from entering the guide area. The slides come in four sizes as measured in slide width: 1.4, 1.8, 2.2, and 3 in. (35, 45, 55, and 75 mm).
The unit's motor, which is matched to the mechanical components, does not project beyond the slide. It can mount axially or in parallel. The slide's sensors are easy to install and simplify position sensing.
Festo Corp.

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Featured Links

Thomas Division
Thomas provides OEM pump and compressor innovations for environmental applications with oil-less technology offerings including WOB-L® and articulated piston, diaphragm, rotary, linear, and liquid pumps.
www.gd-thomas.com

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