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Electric Based Transportation

This overview delves into electric-based transportation, examining the benefits and challenges of electric vehicles (EVs) across light, medium, and heavy categories. Key topics include the advantages of EVs over conventional vehicles concerning cost, environmental impact, and maintenance performance. We detail the components of an EV, focusing on batteries (lead acid, NiCad, NIMH, lithium) and their respective strengths and limitations. Additionally, the role of DC motors and power electronics is discussed, highlighting their significance in EV efficiency. Innovations and future trends in battery technology are also explored.

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Electric Based Transportation

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  1. Electric Based Transportation Steven O. Arlint University of Portland student

  2. Why Go Electric? • Cost • Environment • Performance (maintenance)

  3. Electric Vehicles (EV) • Light

  4. Medium

  5. Heavy

  6. What goes in an EV • Batteries • Motor • Power Electronics • Similar vehicle components elsewhere

  7. Batteries • Advantages over gas • Heat problems • Four main types (there are others) • Lead acid • NiCad • NIMH • Lithium

  8. Lead acid • First technology available • High current, low Internal resistance (Ir) • Low efficiency (chemistry issue)

  9. NiCad • Next available technology • High current, extremely rugged • Bad for environment • Expensive

  10. NIMH • Came after NiCad • Environmentally friendly • Heat, price, Ir, charge issues

  11. Lithium • Modern technology • High current, high efficiency, moderate price • Prone to explosion, charging issues

  12. Lithium explosion

  13. What is the answer then? • Make the best of what we have • New rising technologies (Silicon, NiZn) • Put our hope into the future?

  14. Motor • Limit scope to DC motor (there are others) • Advantages • Disadvantages • Properties

  15. DC motor Advantages • Low cost (old technology) • PM variety has high torque to volume • Easy to control • Rugged

  16. DC motor Disadvantages • Friction • Maintenance • Efficiency

  17. DC motor properties • Speed vs. voltage • Torque vs. current • Power measured in watts or horsepower • Optimum power operating regime

  18. Power Electronics • PWM mode • MOSFETs vs. IGBTs (SCRs also used) • Regenerative braking • Heat dissipation

  19. Similar components • Transmission? • Car itself • Stereo

  20. Questions?

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