Features

Making 3D Objects Disappear

Invisibility cloaks are a staple of science fiction and fantasy, from Star Trek to Harry Potter, but don’t exist in real life. Or do they? Scientists at the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have devised an ultra-thin invisibility “skin” cloak that can conform to the shape of an object and conceal it from detection with visible light. Although this cloak is only microscopic in size, the principles behind the technology should enable it to be scaled-up to conceal macroscopic items as well.

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New Spectroscopy Method Captures Reactions in Photosynthesis

A new spectroscopy method is bringing researchers at Rensselaer Polytechnic Institute (RPI) closer to understanding – and artificially replicating – the solar water-splitting reaction at the heart of photosynthetic energy production. Understanding the step-by-step mechanism of photosynthesis could lead to methods of producing highly efficient solar energy. The spectroscopy method, a novel use of “2D HYSCORE,” is able to capture the reactions that split water and hydrogen peroxide in metal-containing proteins or metallo- enzymes in nature.

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New Solar Energy Storage Technique Could Boost Solar Cell Usage

Researchers at Missouri University of Science and Technology have developed a relatively inexpensive and simple way to split water into hydrogen and oxygen through a new electrodeposition method. The method produces highly efficient solar cells that can gather solar energy for use as fuel. The research, sponsored by the U.S. Department of Energy, could lead to a sizable increase in the amount of hydrogen available for fuel usage.

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Drives

NORD Gear Corp. (Waunakee, WI) offers the SK 180E drives for applications that do not utilize the scope of functionality found in frequency inverters. The drives focus on the functionality necessary for pumps and conveyor technology. They offer a continuous range of performance and optional features for a variety of applications. The series includes three digital inputs, two digital outputs, two analog inputs, an integrated 24V power supply, input power range of 115V single phase to 480V threephase operation, 0.33 to 3.0 HP, AS interface onboard, and operating software for controlling, programming, and diagnosis. For Free Info Visit http://info.hotims.com/55594-306

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Brushless DC Motors

PITTMAN® Motors, a business unit of AMETEK Precision Motion Control (Harleysville, PA), introduced the EC042B brushless DC motor series. The high-torque-density model is designed as a general-purpose servomotor. Its NEMA 17 mounting configuration is adaptable to most metric mounting requirements. The motors are available in three motor lengths with a continuous torque range of 11 Ncm – 31 Ncm, and a peak torque range of 35 Ncm – 99 Ncm. It has a maximum speed of 9,000 rpm and can be used with DC bus voltages up to 96V. There are eight standard winding variations, with custom windings available. The motor construction features a 4-pole rotor with rare earth magnets for high torque-to-inertia ratio. The stator assembly is designed with low-loss materials for higher-speed applications. The motor shaft is supported by shielded ball bearings that are preloaded. The motors are available with optional planetary gearboxes and optical incremental encoders with line counts up to 2,048, three channels, and line driver. For Free Info Visit http://info.hotims.com/55594-305

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PWM Servo Drives

ACS Motion Control (Bloomington, MN) offers the NPMPM Series of dualaxis EtherCAT NanoPWM™ pulse width modulation servo drives. When utilized with the optional 10-MHz laser encoder interface and ServoBoost™ control algorithm, positioning systems can achieve speeds above 2 m/s, sub-nanometer jitter values, nanometer velocity tracking errors, and low settling time with minimal sensitivity to disturbances and load changes. Features include two drives per unit, voltage and current range of 12 VDC – 100 VDC and up to 13.3A / 40A (cont./peak), digital I/O, two Position Event Generators and 2 general-purpose outputs, analog I/O inputs of 4- and 12-bit resolution ±10V, and outputs of 4- and 16-bit resolution ±10V. For Free Info Visit http://info.hotims.com/55594-304

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Rotary Encoders

POSITAL (Hamilton, NJ) released programmable incremental rotary encoders, en - ab l ing performance characteristics such as resolution (number of pulses per turn) and incremental pulse direction (A before B or B before A) to be modified by changing firmware parameters. The characteristics of the output driver can similarly be set to either Push-Pull (HTL) or RS422 (TTL). The encoders are based on magnetic measurement technology, and are compact and resistant to shock and vibration loadings. Resolution can be set in the range of 1 to 16,384 pulses per turn. They are available with high-performance seals for use in extreme environmental conditions. For Free Info Visit http://info.hotims.com/55594-303

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