As 40 Gb fiber becomes a standard option in data centers, the challenge of connecting 40 Gb switches to existing 10 Gb equipment moves front and center. Adding further complexity, it’s clear that organizations of all sizes also need to be prepared to integrate speeds of 100/120 Gb and beyond. Custom breakout cables...
Published: Jul 18, 2018
The large variety of motor technologies and corresponding control schemes available today to the design engineer and the dramatic pressure to reduce development time in industrial projects have created the need for performant design tools which allow to realise, already at a level of preliminary simulation, the complete...
Published: Jul 20, 2018
With the digital expansion over the past few decades, new requirements for data centers to store, transmit, and manage data of all sorts are reaching a critical level.
In this article, GE power discusses the path to improving efficiency as it applies to AC-DC power supplies (AC-DC front ends) within server equipment....
Published: Jul 19, 2018
This paper presents the modeling results for prediction of thermal performance using synthetic jets ejectors. A synthetic jet is an intense, small-scale turbulent jet synthesized directly from the fluid in which it is embedded. A jet ejector consists of a primary high momentum jet inducing a secondary flow within a channel....
Published: Jul 20, 2018
Lithium-ion batteries, like other battery types, are subject to a process of wear and tear during charging and discharging due to chemical changes.
Without battery balancing, the weakest cell in a multicell battery always determines the capacity of the entire system. However, since individual cells age differently,...
Published: Jul 24, 2018
For testing new designs of battery holders, MPD fabricated min-max sized battery slugs. The slugs proved to be a great aid to our engineering staff in several ways. First off is saving time and money by not having to shop for several brands of batteries to confirm that your design works with common batteries.
They...
Published: Jul 24, 2018
Innovative design enhancements make flat cables strong candidates for applications where round cable was once the natural choice.
A new type of flat cable has been developed by Cicoil Corporation that promises to put this last hurdle into the past, opening the potential for engineers to take advantage of flat...
Published: Jul 18, 2018
This paper will examine the key packaging challenges in the fabrication of a 1000x1000 OXC, using MOEMS (micro-optical-electromechanical-systems) mirrors in 2N configurations.
It will describe how wafer-scale-integration (WSI) allowed for much greater simplification of the overall system and creation of the first...
Published: Jul 19, 2018
This paper reviews the state of the art of electric drives technology in three specific areas (a) technical requirements of high−performance ac machines control, (b) most popular electrical machines and (c) control techniques. Key development trends including the dominance of ac adjustable speed drives in new applications,...
Published: Feb 21, 2019
This paper describes a new two-phase cooling heat transfer cell based on a submerged vibration-induced bubble ejection process in which small vapor bubbles attached to a solid surface are dislodged and propelled into the cooler bulk liquid. This ejection technique involves forcibly removing the attached vapor bubbles with...
Published: Jul 20, 2018
As the costs for electricity generated by renewables such as wind and solar decrease and ultimately reach the electricity generation costs of conventional power plants, the demand for components with high reliability and high efficiency increases.
Since 1999, Maxwell Technologies, Inc. (Maxwell) has consistently been...
Published: Jul 25, 2018
Safety, availability, and cost considerations can make performing thorough tests of embedded control devices
using the complete system impractical.
Hardware-in-the-loop (HIL) simulation is a real-time test technique used to test these devices more efficiently.
During HIL test, the physical system that interfaces...
Published: May 01, 2019
Today's high reliability military, aerospace, and industrial applications require more rugged, light - weight filter connectors. The filter connector provides a stray signal barrier upstream and away from electronic devices to protect critical circuits from electrical interference, without affecting system function...
Published: Jul 25, 2018
This paper presents an investigation into the usage of modeling techniques to predict and improve the shielding effectiveness of rectangular, metallic Small Form-factor Pluggable (SFP) EMI cages.
These cages house bi-directional SFP+ transceiver modules that can operate at data rates up to 11.1 Gbps. The simulation...
Published: Jul 24, 2018