Latest Space News
Wed, 21 Nov 2018 03:32:48 +0000
An Arianespace Vega rocket launched the Mohammed 6-B satellite for Morocco the evening of Nov. 20, placing the satellite in the same orbit as its twin satellite Mohammed 6-A that launched a year ago, also on a Vega rocket. SpaceNews.com
Tue, 20 Nov 2018 21:37:08 +0000
As Congress works to finalize a fiscal year 2019 spending bill for NASA, a senator is asking colleagues to secure the future of two of NASA’s largest astrophysics missions. SpaceNews.com
Tue, 20 Nov 2018 12:14:33 +0000
As NASA starts to build up details about its plans to return humans to the moon, the agency is studying concepts for “human-class” lunar landers that would involve three-stage vehicles whose individual components could be flown on a range of launch vehicles. SpaceNews.com
Tue, 20 Nov 2018 01:08:42 +0000
Electronic threats against satellite communication have rapidly escalated in the last few years and will continue to advance in the foreseeable future. SpaceNews.com
Mon, 19 Nov 2018 23:45:45 +0000
The obvious conclusion from Harrison’s study is that the size and budget of a new military service for space can vary considerably depending on the scope of the reorganization. SpaceNews.com
Mon, 19 Nov 2018 19:05:53 +0000
NASA has chosen a Martian crater that once hosted a lake and river delta as the landing site for a mission that will collect samples for eventual return to Earth. SpaceNews.com
Mon, 19 Nov 2018 18:57:47 +0000
What both the Russian and Chinese space forces reflect is a shifting view of the nature of future conflict, and the place space has within that view. SpaceNews.com
Mon, 19 Nov 2018 18:51:58 +0000
The launch means China is now able proceed with its pioneering Chang’e-4 lunar mission, which will attempt the first ever soft-landing on the far side of the moon, with launch expected Dec. 7. SpaceNews.com
Mon, 19 Nov 2018 10:57:30 +0000
Sen. Bill Nelson, the leading advocate for space among Democratic senators, formally conceded defeat Nov. 18 in his bid to win a fourth term. SpaceNews.com
Mon, 19 Nov 2018 01:02:16 +0000
Virgin Orbit performed the first captive carry flight of its LauncherOne air-launch system Nov. 18, a key testing milestone as the company moves closer to a first flight. SpaceNews.com
Sun, 18 Nov 2018 17:49:48 +0000
Steve Nixon: “I think there’s some bureaucratic inertia. Also there’s a space industrial complex that might not want to see a shift to much cheaper assets.” SpaceNews.com
Sat, 17 Nov 2018 22:44:49 +0000
Two months after he unveiled a revised design for SpaceX’s next-generation launch system, Elon Musk suggested that the company is making more changes to the design. SpaceNews.com
Sat, 17 Nov 2018 09:24:58 +0000
Northrop Grumman successfully launched a Cygnus cargo spacecraft to the International Space Station Nov. 17 after two days of weather delays. SpaceNews.com
Fri, 16 Nov 2018 21:13:06 +0000
The U.S. Federal Communications Commission pressed forward with plans to firm up its rules about space safety and orbital debris Nov. 15 while at the same time questioning whether it is the right agency to do so. SpaceNews.com
Fri, 16 Nov 2018 19:23:24 +0000
NASA’s plans to return humans to the surface of the moon within 10 years got a chilly reception from an advisory group Nov. 15, who called on the agency to accelerate that timeframe and reconsider development of the Gateway facility in lunar orbit. SpaceNews.com
Fri, 16 Nov 2018 18:22:49 +0000
The round brings NorthStar E&S’s total funding to 83 million Canadian dollars and ends a funding drought from when the company announced its plans three years ago. SpaceNews.com
Fri, 16 Nov 2018 15:17:38 +0000
Spacety is one of China’s first commercial and private satellite companies in China, established in January 2016, following new government policies introduced in 2014 and 2015 to deregulate the nation’s space sector. SpaceNews.com
Fri, 16 Nov 2018 05:22:08 +0000
AST&Science announced plans Nov. 15 to begin building extremely satellites in 2019 at its new North American manufacturing plant in Midland, Texas. SpaceNews.com
Thu, 15 Nov 2018 22:41:59 +0000
SpaceX matched its personal best with its 18th launch this year, delivering the Es’hail-2 communications satellite to geostationary transfer orbit for Qatari operator Es’hailSat. SpaceNews.com
Thu, 15 Nov 2018 22:37:38 +0000
NASA Administrator Jim Bridenstine said Nov. 15 that the reelection defeat of a key appropriator, and the potential for budget cuts next year, is a cause for concern for him as he tries to balance the agency’s priorities. SpaceNews.com
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  • CV: Post doctoral fellow - Power electronics

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
     Location:<withheld>
    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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