It is a pleasure to reinstate quarterly issues of the IEEE TEC eNewsletter, after a period during which an alternative publication method was being tried out. TEC leadership and publications officers have decided that we return to the successful TEC eNewsletter model, which ran for about more than four quarters until March 2018.
1. The curtain opens
For most people, “transportation electrification” refers to the different aspects of traction. This typically includes the drive system as a whole as well as its elements, such as the electric machine(s), the inverter(s), and the energy storage. Cost, packaging, system layout the energy flow, the electric sizing, but also mechanical stability of the overall chassis and driving behavior are common aspects of interest. The noise developed by such electric traction drives has also gained significant attention. For example, the absence of the noise combustion engine’s noise may allow driving during early morning hours in noise-sensitive neighborhoods, but also affects the pedestrians’ awareness of approaching cars. While theoretically less noisy than a combustion engine, inverter-based drive systems introduce a different frequency spectrum of force excitations which may trigger resonances within the mechanical structure. Such reduction has found wide attention, notably by modifying the control strategy, such as reducing the supply’s harmonic spectrum.
The architecture of modern electric vehicles (EV) with individual on-board and in-wheel motors allows enabling new motion control technologies. Electric motors as highly dynamic actuators can be used for braking, stability, handling and ride control to support operation of traditional active chassis systems as ABS, ESP, torque vectoring et al. This leads to integrated EV dynamics control systems that is beneficial not only for safety and comfort but also for fail-safe operation and redundancy. However, as a result, complex on-board and embedded systems are emerging, which require sophisticated software components and comprehensive validation and testing procedures.
The charging infrastructure is the backbone of electric mobility. A substantial volume of investment is necessary to create the infrastructure for an electric bus (e-bus) fleet. Hence, understanding the charging demand and preferences of a public e-bus fleet is critical to make the investment worthwhile. Moreover, electric mobility is unique from the rest of the road transportation modes since its implementation is inextricably linked with the electricity distribution sector.
The current worldwide trend of the transition to decarbonized energy sources and usages should be both regarded at the systems and components levels. At these, both levels, the energy efficiency aspect, and the usage of available cheap (economically and having the lower ecological impact) materials should be given high attention.
In this context, electricity is the best-suited vector of energy to meet the challenges of our societies. It allows an increase in energy efficiency and a reduction in polluting emissions.
High energy product Neodymium rare-earth permanent magnets (RE-PM) were discovered in the early 1980s and later, Dysprosium doping was discovered to provide reasonable RE-PM operating life by mitigating demagnetization with improved coercivity and high-temperature operation; but also, sacrificed the precious high energy product. Despite ongoing research and development (R+D) for at least a viable Dysprosium alternative, strategically tailoring doping with extremely rare and expensive Dysprosium provides the best permanent magnets for a practical RE-PM electric motor and generator (or electric machine) system (EMS), which is now considered to be the highest performing (and most expensive) EMS available.
About the Newsletter
The Transportation Electrification eNewsletter studies topics that span across four main domains: Terrestrial (land based), Nautical (Ocean, lakes and bodies of water), Aeronautical (Air and Space) and Commercial-Manufacturing. Main topics include: Batteries including fuel cells, Advanced Charging, Telematics, Systems Architectures that include schemes for both external interface (electric utility) and vehicle internal layout, Drivetrains, and the Connected Vehicle.
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