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Director: Barry J Cardwell BSc(Hons) PhD CEng

Keywords: Energy efficient traction drives, Railway and traction simulation, Safety cases, Networker trains, PWM, Harmonics & EMC, Real-time DSP


Dr B J Cardwell

Dr Cardwell graduated in Electrical and Electronic Engineering from University of Birmingham in 1976. He was subsequently awarded PhD from the same university in 1980 upon completion of a thesis on the optimal control of industrial DC and traction drives.

From 1981-85 Barry was employed as a specialist senior control engineer in the systems design department of Marconi Command and Control Systems. Tasks included the design and simulation of electric and hydraulic servo controls, including digital and Kalman filtering.

From 1985-89 he was employed as a principal engineer for Brush Electrical Machines in the control systems department of the traction division. The remit was to develop AC traction drives. He was responsible for control system design and real-time software on Class 457 EMU, a three phase drive prototype Networker train for British Rail (now Network Rail), the subsequent Class 465 Networker trains, and for design and simulation the Class 60 freight locomotive traction control.

Since then rail career interests have been pursued as an independent consultant, providing technical expertise to major British and International railway organisations in the areas of train simulation, real-time control, EMC and reliability. Major contract consultancy includes Networker trains, Docklands (phase 2) LRV, Central LIne Tube Stock, Eurostar, Hong Kong Battery Locomotives, Class 92 safety case, Taiwan Push-Pull Locomotives, EMUs for Malaysia and South Korea, Junipers and Class 390 (Pendolino) on WCML.

Current interests include energy conservation on railways using models to investigate regenerative braking and the appropriate methods of energy storage to maximise energy savings. Design sensitivity of energy efficient traction drives to operational voltage and network configuration parameters results in a unique solution for each railway system.


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