Power Management
NASA Flywheel for iPad
Posted in Briefs, TSP, Power Management on Monday, 01 June 2015
John H. Glenn Research Center, Cleveland, Ohio NASA Flywheel is an augmented reality application intended to highlight NASA Glenn’s research efforts in the area of flywheel energy storage systems. The app utilizes a printed optical target, available on the GRC Flywheel Program brochure and through the NASA Glenn Web portal, to present users with 3D views of flywheel hardware and space applications. Additional video and imagery are also included in the application package. The software has been compiled and bundled as an iOS app for the iPad, and is intended for release through the Apple App Store.
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Three-Dimensional Photovoltaics Array for Laser-Based Power Transfer
Posted in Briefs, TSP, Power Management on Monday, 01 June 2015
Potential applications include situations in which there is a need to create electrical power at a remote location. Goddard Space Flight Center, Greenbelt, Maryland A standard solar array is a flat panel configured of many individual solar cells, wired in series or parallel, depending on their junction configuration and material. Since the solar flux is constant depending on the distance from the Sun, the maximum energy conversion for a given solar panel depends upon the capability to absorb as many spectral peaks as possible (different materials) across the total solar spectrum. If the radiative source is a man-made device such as a laser, parked in a different orbit or on Earth, then the impinging intensity is narrow spectrally, coherent and accurately pointed, and capable of very high intensities. Thus, the materials can be tailored to match the incoming radiation for maximum absorption.
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Nanowire-Based Piezoelectric Power Generation
Posted in Briefs, Power Management on Monday, 01 June 2015
Energy scavenging is appealing for powering sensors, and for charging cellphones and small consumer electronics. Ames Research Center, Moffett Field, California Sensors have improved in terms of size, capability, and power consumption, but their deployment in remote areas is limited by battery power supplies. Using piezoelectric (PE) materials for energy scavenging is a possible way to remedy the situation. The technology developed in this work converts existing sources of nonpolluting energy (mechanical strain) from nature into electricity. The quantity of energy produced is not massive, but it can be easily generated from free sources such as vibration and electromagnetic waves.
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From the Editor: April 2015
Posted in Features, Products, Power Management, Power Supplies, Motors & Drives on Wednesday, 01 April 2015
Products of the Year Named and Your Chance to Create the Future   In December, we asked Medical Design Briefs readers to select the one product from our 12 Products of the Month that you thought was the most significant new introduction to the design engineering community in 2014. Thank you to all of our readers who voted and chose two winners for the 2014 Medical Design Briefs’ Readers’ Choice Product of the Year:
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0T Series – Watertight Connector
Posted in Products, Electronic Components, Electronics, Power Management, Power Supplies on Wednesday, 01 April 2015
LEMO USA, Inc., Rohnert Park, CA, introduces the 0T Series Connector, a small sized watertight connector using the same original LEMO Push-Pull technology. Based on the LEMO B Series, the 0T Series Connector includes a special construction with an inner sleeve and extra sealing to enable IP68 water protection. The 0T Series is available in 2- to 9-contact configurations. Contacts can be terminated by soldering to the wire, crimping onto the wire, or directly to a PCB. For Free Info, Visit http://info.hotims.com/55588-175
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International Power Cords and Cord Sets
Posted in Products, Electronic Components, Electronics, Power Management, Power Supplies on Wednesday, 01 April 2015
Qualtek, Mentor, OH, announces that it now fully stocks a comprehensive selection of 2- and 3-conductor North American power cords, international power cords, and hospital-grade power cords in various configurations. A wide selection of plugs and connectors are available with various cable jackets including outdoor rated, colors, temperature rating, lengths, and shielding. Custom configurations, value added termination, and strain reliefs are available upon request. For Free Info, Visit http://info.hotims.com/55588-176
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Reducing Power-On/Off Glitches in Precision DACs
Posted in Briefs, Power Management, Motors & Drives on Wednesday, 01 April 2015
Voltage glitches are common in a signal chain path, especially when the system is being powered up or down. Depending on the peak amplitude and glitch duration, the end result in the system output can be catastrophic. One example is an industrial motor control system where a digital-to-analog converter (DAC) drives the motor drivers to control motor spin. If the glitch amplitude is higher than the motor driver’s sensitivity threshold, the motor could be spinning without control in any direction when the system is powered up/down.
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