Latest Space News
Tue, 16 Jul 2019 08:00:38 +0000
I believe that the days are receding rapidly when we considered ourselves a niche and, from the perspective of the wider world, a somewhat invisible industry. SpaceNews.com
Mon, 15 Jul 2019 22:07:43 +0000
SpaceX said July 15 that the explosion that destroyed a Crew Dragon spacecraft during a ground test in April was likely caused by oxidizer that leaked into the spacecraft’s propulsion system and destroyed a valve, but didn’t give a firm schedule for resuming test flights. SpaceNews.com
Mon, 15 Jul 2019 20:57:02 +0000
Secretary of the Navy Richard Spencer became the third acting secretary of defense since Jim Mattis resigned. SpaceNews.com
Mon, 15 Jul 2019 20:25:02 +0000
The committee cited concerns about the "turmoil surrounding the Space Development Agency." SpaceNews.com
Mon, 15 Jul 2019 20:18:20 +0000
Under newly proposed rules, smallsat operators will be able to choose a licensing path — for authorization as a domestic operator or for U.S. market access as a foreign operator — for $30,000 instead of the $472,000 fee required today for satellites in non-geosynchronous orbits.  SpaceNews.com
Mon, 15 Jul 2019 19:02:33 +0000
The House and Senate voted in support of a space service to be nested inside the Air Force, but much still remains unresolved. SpaceNews.com
Mon, 15 Jul 2019 10:10:35 +0000
A month after NASA rolled out a strategy to increase commercial use of the International Space Station, some in Congress are skeptical of the effort. SpaceNews.com
Sun, 14 Jul 2019 14:14:03 +0000
Kevin Bell with The Aerospace Corporation describes the 59-year-old organization as an “innovation shop that helps invent and maintain essentially the corporate knowledge for the U.S. government.” SpaceNews.com
Sun, 14 Jul 2019 10:12:49 +0000
Proposed changes to the National Security Space Launch program that Smith introduced in the HASC version of the NDAA made it into the House bill. SpaceNews.com
Fri, 12 Jul 2019 23:10:19 +0000
NASA Administrator Jim Bridenstine said he reassigned the agency’s human spaceflight head, Bill Gerstenmaier, because time was limited to address cost and schedule issues with the agency’s key exploration programs and still meet a 2024 deadline for returning humans to the moon. SpaceNews.com
Fri, 12 Jul 2019 22:18:21 +0000
NASA awarded a $73.7 million contract to Made In Space to additively manufacture beams on the Archinaut One satellite scheduled to launch in 2022. SpaceNews.com
Fri, 12 Jul 2019 16:54:22 +0000
Airbus and the French Space Agency CNES have agreed to cofinance a constellation of four Earth observation satellites while leaving the door open for Airbus to finance additional satellites with other partners.  SpaceNews.com
Fri, 12 Jul 2019 13:50:53 +0000
China appears set to deorbit its Tiangong-2 space lab in the near future, according to a social media release from the China Manned Space Engineering Office. SpaceNews.com
Fri, 12 Jul 2019 13:45:19 +0000
The initial prototype of SpaceX’s next-generation reusable launch vehicle will make its first, albeit low-altitude, test flight early next week, Elon Musk announced July 12. SpaceNews.com
Fri, 12 Jul 2019 09:21:11 +0000
NASA’s leadership offered few details July 11 about the sudden reassignment of two top officials in its human spaceflight program the day before, a move that drew criticism from leading House members. SpaceNews.com
Fri, 12 Jul 2019 08:22:41 +0000
The chairman of the Senate’s space subcommittee says he’s working with colleagues on a “bold” new NASA authorization bill to direct the future of the agency’s human spaceflight program. SpaceNews.com
Thu, 11 Jul 2019 20:32:53 +0000
Gen. Mark Milley said he fully supports the establishment of a Space Force and rejects the criticism that the new branch is just an “added layer of bureaucracy.” SpaceNews.com
Thu, 11 Jul 2019 19:00:28 +0000
After years of delays, PlanetiQ says its constellation of commercial weather satellites will be ready to start launching in January thanks to $18.7 million in new capital.  SpaceNews.com
Thu, 11 Jul 2019 14:52:54 +0000
The engineers who developed the computers that enabled the Apollo 11 lunar landing had little doubt the mission could be a success, and half a century later have advice for how NASA should return to the moon. SpaceNews.com
Thu, 11 Jul 2019 11:07:47 +0000
In a move that took most people in the space industry by surprise, NASA has reassigned two top officials in its exploration program, including Bill Gerstenmaier, the longtime head of NASA’s human spaceflight programs. 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>
     Phone:<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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