Areas of Research Expertise

Electrical Machines

  • Permanent magnet machines
  • Switched reluctance machines                            
  • Self bearing PM machines                          
  • Synchronous reluctance machines & permanent magnet assisted synchronous reluctance machines           
  • Induction machines                         
  • Motors/generators/actuators - rotary & linear                
  • Design synthesis methodologies
  • Computer-aided design
  • Acoustic noise & vibration
  • Novel machine topologies:
     - high-speed machines
     - low-speed direct-drive machines
     - Halbach magnetised machines
     - variable-flux machines
     - switched-flux machines
     - magnetically geared machines
     - high temperature machines

Drives

  • Resonant link converters
  • Matrix converters
  • Multi-level inverters
  • Fault tolerant converters
  • High efficiency converters
  • Active rectification
  • PWM strategies
  • EMC
  • System simulation

Actuators

  • Magnetic gears
  • Resonant actuators
  • Spherical actuators
  • Electromagnetic valve actuation
  • Flow-control actuators
  • High temperature actuators
  • Fast-acting short-stroke actuators
  • Long-stroke linear motors
  • Linear generators
  • Active vibration control

Energy Storage Management

  • Batteries
  • Supercapacitors
  • Flywheels
  • System management
  • Testing facilities

Demonstrator Prototyping/Testing

  • In-house DSP & dSPACE platform
  • Motors/actuators
  • Magnetic material characterisation
  • Power module packaging & characterisation
  • Drive systems
  • Functional products

Power Electronics

  • High temperature power devices
  • Packaging of integrated power modules
  • Losses in devices
  • Power semiconductor technologies in Silicon, Gallium Nitride & Silicon Carbide                                                                                                                                                   
  • Precision loss measurements
  • Thermal modelling & testing

Control Systems

  • Sensorless control
  • Direct torque control
  • Flux-weakening control
  • Traction control
  • Fault tolerant control
  • Integrated grid, battery charging, electric drives & machines
  • Application of intelligent control
  • Predictive control for energy optimisation on electric & hybrid electric vehicles
  • Multi-variable control
  • Inverter switching algorithms
  • Torque ripple reduction
  • Interference of machines, inverters & control strategies
  • Active acoustic noise & vibration control
  • Stability analysis & control of electrical power systems

Magnetics

  • Material characterisation & modelling
  • Analytical & numerical field analysis
  • Hysteresis & eddy current iron losses
  • Eddy current losses in permanent magnet
  • Cogging torque
  • Cross coupling effect
  • Torque ripples
  • Impulse magnetisation

Fault Diagnosis & Condition Monitoring

  • Parameter estimation
  • Condition monitoring of machines, power electronics & drive systems
  • Health monitoring
  • Short circuit & open circuit analysis & mitigation
  • Irreversible demagnetisation analysis & detection of permanent magnets
  • Magnet temperature rise detection
  • Manufacturing tolerance
  • Operating tolerance
  • Life prediction of drives & machines

Multi-Physics Modelling & Advanced Computing

  • CAD
  • System simulation
  • Thermal modelling
  • Computational fluid dynamics
  • Mechanical stress analysis
  • Acoustic noise & vibration