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The Long Group

 

Device 

                                                                                                                  

WBG device characterisation 

  • High bandwidth differential voltage sensing (DC to 1 GHz)
  • High bandwidth current sensing (DC to 1 GHz)
  • Device modelling and switching characterisation 

WBG power module and packaging

  • Ultra-low power loop inductance design (<1 nH)
  • Polymer substrate power PCBs
  • Integrated gate drives and sensors 

  

    Soft-switching and device paralleling 

    • ZVS of paralleled WBG devices 
    • Asynchronous switching of paralleled devices 
    • Thermal and current balancing between paralleled devices

     

    Converter

                                                                                                                     

    DC-DC converters 

    • Isolated DC-DC converter topologies and control 
    • Control and magnetic design of Dual Active Bridge
    • Non-isolated DC-DC converter topologies and control

    AC-DC converters 

    • LCL filter design and optimisation 
    • Power supply units 
    • EV traction inverter 

    Converter-on-chip and packaging

    • Switching-capacitor converter topologies 
    • Integration of passive components 
    • High power density 48V DC-DC converters

     

    System

                                                                                                                     

    Transport electrification

    • EV on-board charger (OBC)
    • SiC based EV traction inverter 
    • Propulsion drives for ships 

    Inductive Power Transfer (IPT)

    • Nanocrystalline alloy (FeCuNbSiB) cores for ferrite-less IPT systems
    • Thermal and reliability of IPT systems
    • Efficiency increase and misalignment tolerance

    DC distribution networks

    • High power semiconductor DC power systems 
    • DC network stability and control 
    • Energy storage connection 

     

    Research Grants: 

    • 2021-2022 Industrial sponsorship from the Centre for Advanced Photonics and Electronics (CAPE) and Electronics, ‘High Efficiency VRM Electromagnetic Technology Research’ (G11154), Principal Investigator, £117,583

    • 2020-2021 Industrial sponsorship from the Centre for Advanced Photonics and Electronics (CAPE) and Electronics, ‘High Efficiency DC-DC converter’ (G108175), Principal Investigator, £139,963

    • 2020-2022 UK Engineering and Physical Science Research Council (EPSRC), ’Optimal passive filter topology for advanced power electronics converters’, Principal Investigator, £142,696

    • 2020-2022 Industrial sponsorship from the CBMM, ’Nanocrystalline alloy (FeCuNbSiB) based magnetic cores in high power Inductive Power Transfer (IPT) for Wireless EV charging’(G105565), Principal Investigator, £338,344

    • 2020-2022 UK Engineering and Physical Science Research Council (EPSRC) Global Challenges Research Fund (GCRF): ’Affordable Perovskite Solar Irrigation Systems for Small-holder Farmers in Ethiopia (APSISSFE)’(EP/T02030X/1), Co-Investigator, entitled: £328,358, total: £938,246

    • 2018-2020 UK Engineering and Physical Science Research Council (EPSRC): New Investigator Award, ’Enhancement of Inductive Power Transfer (IPT) for Wireless EV Charging’(EP/R036799/1), Principal Investigator, £261,765

    • 2018-2020 Innovate UK: Innovation in Vehicle-to-Grid (V2G) Systems R&D Grants, ’Universal modular Vehicleto-Grid bi-directional on-board charger with SiC technologies’(TS/R016968/1), Principal Investigator (Academic), £264,716

    • 2018-2020 Industrial sponsorship from the SAIC Motor UK Technical Centre Ltd, ’Next generation power electronics technologies in EVs’(RG96662), Principal Investigator, £294,620

    • 2018-2019 Industrial sponsorship from the Wuxi Silent Electric System Technology Ltd, ’Supercapacitor based energy storage in electric systems for ships’ (RG95400), Principal Investigator, £55,579

    • 2019 EPSRC Global Challenges Research Fund (GCRF) Internal Grant, ’A low cost high performance solar inverter for Tanzania’(G100049), Principal Investigator, £80,000

    • 2017-2018 EPSRC Global Challenges Research Fund (GCRF) Internal Grant, ’A low cost high performance solar inverter’(RG92550), Principal Investigator, £26,370

    • 2017-2018 Issca Newton Trust, ’Intelligent Transformers for Future Internet of Energy’ (RG74916), Principal Investigator, £25,000