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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: 

  • 2023-2024 UK Engineering and Physical Science Research Council (EPSRC) IMPACT ACCELERATION ACCOUNT, 'High bandwidth current sensor for high speed power electronics' (G116766), Principal Investigator, £146,097

  • 2022-2025 Industrial sponsorship from NIO Ltd, 'POWER ELECTRONIC MODULE DESIGN AND RELIABILITY ANALYSIS FOR EV APPLICATIONS' (G114992), Principal Investigator, £381,595

  • 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