Latest Space News
Fri, 25 May 2018 05:45:07 +0000
Companies that one competed for the Google Lunar X Prize now expect to fly their first lunar landers in the next two years to serve the needs of commercial and government customers, including NASA. SpaceNews.com
Thu, 24 May 2018 22:27:48 +0000
Virgin Orbit’s campaign to design, build and fly LauncherOne, its air-launched rocket for small satellites, relies heavily on manufacturing software. SpaceNews.com
Thu, 24 May 2018 18:58:04 +0000
A new policy President Trump will sign May 24 will implement a series of regulatory reforms to support commercial space recommended by the National Space Council earlier this year. SpaceNews.com
Thu, 24 May 2018 17:14:56 +0000
PASADENA — NASA intends to begin buying rides on small commercial lunar landers by the end of the year and start looking for miniature instruments for those flights. “We have a strong push to get a lander service to the Moon as quickly as possible,” James Reuter, NASA deputy associate administrator for the Space Technology Mission […] SpaceNews.com
Thu, 24 May 2018 15:14:49 +0000
As the U.K. continues to wrangle with the EU over Galileo, there is growing speculation that the country could seek to develop its own independent global navigation system with Australia — or even Japan. SpaceNews.com
Thu, 24 May 2018 14:06:41 +0000
Bombastic and colorful, Rogozin’s international profile shot up significantly in 2014 when, in response to the first round of Western sanctions against Moscow for its annexation of Crimea, he tweeted that NASA could use a trampoline to reach the International Space Station. SpaceNews.com
Thu, 24 May 2018 13:22:56 +0000
Technological advances have opened up a wide range of propulsion options for satellites, but companies developing those systems don’t expect a single approach to become dominant. SpaceNews.com
Thu, 24 May 2018 13:00:07 +0000
ICEYE raised $34 million in a Series B investment round, bringing the Finnish company’s total funding to $53 million, ICEYE announced May 24. SpaceNews.com
Thu, 24 May 2018 12:47:15 +0000
PASADENA, California — Satellite manufacturers and operators attending the Space Tech Expo here offered contrasting views on how long satellites should continue to work in orbit. For years, government and commercial operators sought to extend the life of satellites by sending them into orbit with plenty of fuel and components designed to withstand 15 years […] SpaceNews.com
Thu, 24 May 2018 11:13:50 +0000
In his first congressional testimony since becoming NASA administrator a month ago, Jim Bridenstine sought to reassure Senate appropriators about the status of several agency programs threatened with cancellation, as well as his own views on climate change. SpaceNews.com
Thu, 24 May 2018 02:30:48 +0000
A major challenge facing companies planning to perform on-orbit servicing will be ensuring satellite operators do not view their activities as potential threats. SpaceNews.com
Thu, 24 May 2018 02:10:04 +0000
The U.S. Air Force's plans to respond to emerging threats by launching constellations of satellites. That strategy has important implications for spacecraft manufacturing and testing. SpaceNews.com
Wed, 23 May 2018 23:31:37 +0000
A cooling problem with a key instrument on a weather satellite launched less than three months ago could degrade its performance for at least part of each day, with potential but still undetermined effects on weather forecasts, officials said May 23. SpaceNews.com
Wed, 23 May 2018 21:11:17 +0000
The U.S. Federal Communications Commission rejected a Eutelsat application for a satellite that would use the same spectrum as one planned by Intelsat. SpaceNews.com
Wed, 23 May 2018 20:43:25 +0000
An NBN executive estimated the business service will use 15 percent of the capacity on the Sky Muster satellite system. SpaceNews.com
Wed, 23 May 2018 16:15:20 +0000
U.K. Air Chief Marshall Sir Stephen Hillier says the cost-effective technology with its short development cycles would enable the military to always take advantage of the latest technological developments, unlike the traditional slow-paced military satellite projects. SpaceNews.com
Wed, 23 May 2018 13:22:07 +0000
AGI, in partnership with a Canadian company, announced May 23 that it has established the first commercial radar system capable of tracking objects in geostationary orbit and beyond. SpaceNews.com
Wed, 23 May 2018 12:23:15 +0000
In the future, the U.S. Air Force will launch satellites of all different sizes for customers with varying degrees of risk tolerance. SpaceNews.com
Wed, 23 May 2018 11:18:11 +0000
As SpaceX launched another Falcon 9 with a previously-flown first stage May 22, both the company and its competitors are seeing a growing acceptance of reusable vehicles in the overall market. SpaceNews.com
Wed, 23 May 2018 00:18:15 +0000
The launch industry is facing a shakeout in the coming years that could result in the failure of the vast majority of companies developing new vehicles, industry executives warned at a conference. SpaceNews.com
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  • CV: Post doctoral fellow - Power electronics

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
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    Contact information
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    Candidate Profile
     Date Submitted:23-03-2015
     Last Modified:23-03-2015 (04:24)
    Job information
     Current job:Post doctoral fellow - Power electronics
     Employment Term:Temp/Contract
     Job location:Anywhere
     Date available:within 3months
     Industry:
     KeywordsPower electronics, SMPS, wide band gap devices, power managment, converter design,
    CV

    EDUCATION

                    2011-2014        Ph.D in power electronic: G2Elab/Thales, Grenoble, France

    Thesis title: High frequency DC-DC converter using GaN devices.

     

                    2007-2010        ENGINEERING SCHOOL: ENSE3, GRENOBLE, FRANCE

    Electrical engineering degree with a specialization in power electronic.

     

    EXPERIENCES

                    2014-2015        Postdoctoral fellow, G2Elab, France

    ·      Design of 600V switching mode power supply (SMPS) using GaN devices, for motor control.

    ·      Computation of stray parasitic elements to improve dynamic performances.

    ·      Study of different gate driver topologies to work at high temperature.

    ·      EMC optimization

    ·      PCB design

    ·      Tests and measures

    ·      Team leader in the Little Box Challenge (LBC).  High power density, single phase 2kVA inverter.

    ·      Optimization of every aspect of the inverter: Control, gate driver, layout, EMC, filters, power topology, packaging, thermal aspects…

    ·      Multi-level topology

    ·      Active filter

    ·      GaN FET

     

                    2011-2014        Ph.D student, G2Elab/Thales, France

    ·      Realization of a 100W 1.4MHz insulated DC/DC converter achieving 92% efficiency.

    ·      Analysis of insulated DC/DC converter topology like DAB.

    ·      Use of MOSFETs and wide band gap devices for high frequencies (GaN devices).

    ·      PCB design using Altium. Reduction of parasitic elements to prevent EMC issues. SMD and through hole devices on PCB or IMS substrate.

    ·      Hardware construction. Electronic hardware design.

    ·      Parasitic elements computation using InCa3D.  Design of inductances using PCB tracks.

    ·      Design of different insulated gate driver topologies. Realization of an IC to improve commutation of wide band gap devices.

    ·      Simulation of power electronic circuits (SMPS) using SPICE-like tools.

    ·      Loss computation in switches and magnetic elements using Mathcad.

    ·      Design of magnetic components.

    ·      Analogue and digital controllers.

    ·      Measures, test and debug of switch mode power supply.

     

    2010                    research internship, CEA-INES, Bourget du lac, France (6months)

    ·         Study of the impact of soiling on photovoltaic panel efficiency.

    ·         Spectral responsivity analysis.

    ·         Spectrometry.

     

    2009                    Internship, Expert solaire, Poisat, France (3months)

    ·         Design of solar PV array systems on roofs using PVsyst.

    ·         Evaluation of shadings.

    ·         3D modelling of the building and its PV system.

     

    PUBLICATIONS

    insulated gate driver for eGaN fets

    Delaine, Johan ; Jeannin, Pierre-Olivier ; Frey, David ; Guepratte, Kevin

    Energy Conversion Congress and Exposition (ECCE), 2014

     

    Improvement of GaN transistors working conditions to increase efficiency Of A 100W DC-DC converter

    Delaine, Johan ; Jeannin, Pierre-Olivier ; Frey, David ; Guepratte, Kevin

    Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Seventh Annual IEEE

     

    High frequency DC-DC converter using GaN device

    Delaine, Johan ; Jeannin, Pierre-Olivier ; Frey, David ; Guepratte, Kevin

    Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE

     

    LANGUAGES

    French: native language.

    English: Fluent.

     

    HOBBIES

    Traveling, hand ball (captain and coach), riding motorcycle, growing bonsai and playing guitar and drums.


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