This book, which results from the collaboration between two experienced EV engineers who have designed and put into production many or all of the technologies to be presented, will provide a comprehensive overview of hybrid, electric, and fuel cell vehicle systems and associated power electronics and drives. It will provide an overview on the electromechanical loads required for propulsion and then address the various on-vehicle energy-storage options ranging from hybrid to Li-Ion battery-electric vehicle (BEV) to fuel cell. The various powertrain systems, power electronics and drives interfaces will be the main focus of the book and will be addressed in detail with the focus on the key technologies enabling the electric powertrain. These will include the standard propulsion machines of induction and permanent magnet and the key power semiconductor devices, e.g. the Insulated Gate Bipolar Transistor (IGBT). Other features of the book include: a dedicated chapter on related materials such as magnetics and capacitors; consideration of design and practicalities; technical detail on the core technologies of power electronics & devices and examples, homework tasks and computer assignments (based on 2D FEA, PSPICE circuit analysis and MatlabSimulink) will be provided ranging from electromagnetic simulation to circuit analysis to system modelling. Ultimately, the overarching goal of the text will be to empower the reader to holistically understand the core technologies and their application in EVs.