Keynote Speakers

Prof. Yoichi Hori (University of Tokyo, Japan)

                            Prof. Yoichi Hori
	Novel EV Society based on Motor/Capacitor/Wireless
	- Application of Electric Motor, Supercapacitors, and Wireless Power Transfer to Enhance Operation of 
	  Future Vehicles -

	   Why do we need to supply "big energy" to electric vehicles (EVs) "to stop" and "for a short time"?
	The energy form of electricity is absolutely different from gasoline. We do not need to take the same 
	style of gasoline vehicle.  Future EVs will be linked to the electric power system infrastructure; 
	the vehicles will operate through frequent electric charging, as is the case with electric trains.
	   Wireless power transfer based on magnetic resonance is an extremely important technique to receive 
	energy from the infrastructure.  In a laboratory experiment, this technique enabled approximately 1kW 
	power transfer with more than 90% efficiency at a distance of 1 m.  It opens a way to the novel EV world.
	   Supercapacitors, rather than batteries, will play an important role in the future for charging of EVs.
	Supercapacitors have a long operating life (a few million times charge/discharge life), large current 
	density, and environmentally friendly composition.  Further, their energy level can be estimated from 
	the terminal voltage. EVs powered by supercapacitors can operate for more than 20 min after being 
	charged for only 30 s.
	   Electric motors have three major advantages: motor torque generation is quick and accurate, a motor 
	can be attached to each wheel, and motor torque can be estimated precisely. These advantages enable
	the realization of high performance antilock braking and traction control systems, control of 
	two-dimensional chassis motion, and estimation of road surface condition.  This motion control technique
	improves energy efficiency and safety of future EVs.
	   In summary, we can achieve a large-scale development of future vehicles that employ three techniques: 
	Electric Motors, Supercapacitors, and Wireless Power Transfer. This eliminates the requirement for 
	engines, high performance Li-ion batteries, and quick charging stations.

Dr. Kamil A. Grajski (Qualcomm, USA)

                            Dr. Kamil A. Grajski
	Loosely-Coupled Wireless Power Transfer: Physics, Circuits, Standards

	    Loosely-coupled wireless power transfer (WPT) technology offers unique, next-generation 
	improvements in user experience, and product design and innovation towards the vision of 
	ubiquitous power and infinite stand-by time for a wide range of consumer electronic devices.
	    This talk will outline the vision primarily as it relates to today's mobile, battery-powered, 
	hand-held, consumer electronics devices, and consider the advantages and disadvantages of
	loosely-coupled WPT with respect to alternative approaches.
	    The talk will describe the physics of loosely-coupled WPT, discuss approaches and challenges
	in implementing WPT electronic circuits, and consider how industry can move toward timely,
	high-quality WPT technical standards.

Prof. Luca Roselli (University of Perugia)

                            Prof. Luca Roselli
	EM- and piezo- scavengers: two useful solutions in highly humanized scenarios toward a "greener world"

	    This contribution focuses on two different energy scavenging possibilities very promising in 
	view of evolution of electronic ultra-low power systems in highly humanized scenarios.
	    First we describe an integrated design of RF/Microwave receivers and conversion systems for 
	energy harvesting to be adopted in ultra-low power density environments. Such systems can be very
	useful in the presence of existing wireless systems with power densities as low as a few mW/cm2. 
	Despite of the scarce RF power available, energy usable to extend battery life or to self-power 
	low-duty cycle electronics may be scavenged by highly efficient receivers and power converter 
	circuits designed in a unique design process. A multi-band antenna can be used as the RF power 
	receiver. Its frequency-dependent equivalent circuit in the presence of incident fields, 
	simultaneously radiated in several bands, is used in the joint design of a rectifier stage and of 
	a boost converter that can dynamically track the maximum power point. This is obtained by a 
	simulation approach combining SPICE-like time-domain models of dispersive multiport components 
	with the transient analysis of the storage and control sub-systems. The system operation, 
	measured in a practical application for wearable autonomous sensors, is presented and predicted
	and measured stored energy and system efficiency are discussed.
	    Second, a more conventional piezoelectric scavenger is introduced as a power source of a 
	nomadic RFID-reader as a part of a novel localization system approach. The latter is intended 
	as an example of multidisciplinary (RFID-NFC, ultra-low power systems, short range wireless 
	power transfer, organic technologies and so on), fully autonomous (energy scavenger on board, 
	battery-less), wirelessly empowered (multitude of passive tags is energized by autonomous reader), 
	evolutionary electronic system toward a "greener world".

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