Latest Space News
Fri, 22 Feb 2019 12:12:05 +0000
As NASA selects payloads it plans to fly on commercial lunar landers, companies developing those spacecraft are skeptical any landers will be ready to fly this year, as the agency desires. SpaceNews.com
Fri, 22 Feb 2019 03:18:10 +0000
A SpaceX Falcon 9 carrying an Indonesian communications satellite, an Israeli lunar lander and a U.S. Air Force smallsat launched Feb. 21 from Cape Canaveral, Florida. SpaceNews.com
Thu, 21 Feb 2019 23:49:24 +0000
Air Force Chief of Staff Gen. David Goldfein: "There are a thousand decisions that have to be made." SpaceNews.com
Thu, 21 Feb 2019 23:43:36 +0000
The Pentagon would ask Congress to approve “special temporary authorities” for the secretary of defense to transfer resources from other services to the Department of the Air Force and the Space Force. SpaceNews.com
Thu, 21 Feb 2019 21:34:19 +0000
EchoStar wishes it ordered its latest satellite, Jupiter-3, sooner than it did, but won’t seek to play catch up by buying another copy of the satellite in order to meet surging demand for broadband connectivity, executives said Feb. 21. SpaceNews.com
Thu, 21 Feb 2019 21:10:24 +0000
At the end of 2018, division chief Clare Grason and her entire satellite communications team at the Defense Information Systems Agency moved over to work in the same capacity under Gen. John (“Jay”) Raymond at the Air Force Space Command (AFSPC). SpaceNews.com
Thu, 21 Feb 2019 18:48:59 +0000
The challenge facing U.S. Strategic Command is figuring out how to develop a modern nuclear command, control and communications system (NC3) that passes muster. SpaceNews.com
Wed, 20 Feb 2019 22:17:54 +0000
As Blue Origin prepares to start flying people on its New Shepard suborbital vehicle, the company’s founder says the altitude the vehicle can reach will put it at an advantage over Virgin Galactic’s SpaceShipTwo. SpaceNews.com
Wed, 20 Feb 2019 21:53:23 +0000
The Indonesian communications satellite that is SpaceX’s primary payload for its second Falcon 9 launch this year overcame a change of manufacturers and the loss of a U.S. Ex-Im Bank loan to reach the launch pad. SpaceNews.com
Wed, 20 Feb 2019 17:21:12 +0000
Facebook and Viasat are collaborating first in Mexico, but are open to expanding globally, Viasat said. SpaceNews.com
Wed, 20 Feb 2019 15:26:15 +0000
Virgin Galactic scrubbed the Feb. 20 flight test for SpaceShipTwo, the air-launched suborbital spaceplane, due to high winds in Mojave, California. The flight test is now scheduled for Friday, Feb. 22. SpaceNews.com
Tue, 19 Feb 2019 23:39:24 +0000
The new chair of the House space subcommittee says she’s looking forward to working with the commercial space industry on a number of issues, including oversight of non-traditional space activities. SpaceNews.com
Tue, 19 Feb 2019 23:20:06 +0000
ULA and SpaceX will split six national security launches planned for 2021 to 2022, the Air Force announced Feb. 19. SpaceNews.com
Tue, 19 Feb 2019 22:18:37 +0000
SPD-4 gives the Pentagon the official go-ahead to send a proposal to the White House recommending the establishment of a separate military branch for space. SpaceNews.com
Tue, 19 Feb 2019 20:15:12 +0000
Virgin Galactic plans to conduct a fifth test flight Feb. 20 of its suborbital spaceplane SpaceShipTwo, VSS Unity. SpaceNews.com
Tue, 19 Feb 2019 20:14:26 +0000
A slow start for Eutelsat’s Konnect Africa broadband venture and losses in activities beyond the fleet operator’s core business contributed to a 4.4 percent decline in revenue during the last half of 2018. SpaceNews.com
Mon, 18 Feb 2019 22:11:51 +0000
The multiyear investment begins with 18-month contract worth few million pounds. SpaceNews.com
Mon, 18 Feb 2019 01:28:19 +0000
As LeoStella inaugurated the factory that will be used to produce a series of Earth imaging satellites, the joint venture of Thales Alenia Space and Spaceflight Industries continues to look for other customers. SpaceNews.com
Sun, 17 Feb 2019 22:54:09 +0000
DoD wants space sensors that can be counted on to work even in adverse conditions like solar activity, radiation belts and orbital debris. SpaceNews.com
Sun, 17 Feb 2019 22:29:43 +0000
An appropriation bill signed into law Feb. 15 gives NASA $21.5 billion for fiscal year 2019, $1.6 billion above the administration’s original request. 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
     Email:<withheld>
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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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