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A numerical investigation is carried out to assess the EMC and EMF safety compliance of a wireless power transfer (WPT) system used to recharge the battery of an electric vehicle (EV). The assessment is numerically performed considering a WPT system working at the frequency of 85 kHz with output power of 7.7 kW. The prediction of the electromagnetic field is carried out by using a finite element method...
Two low-profile and compact 3D antennas operating at LTE, GSM and UMTS frequency bands (790-2690 MHz) are here numerically analyzed for a vehicular MIMO system. After an analysis of the single element performance, two identical 3D antennas are considered. A preliminary numerical analysis on the effect of geometrical parameters such as inter-element distance and reciprocal orientation have been discussed...
Oerlikon Graziano has designed and patented an elegant DHT concept, starting from the know-how cumulated in the last years from the concept of the OGeco transmission, previously presented at the CTI Berlin. This has been achieved by continuous improvement activities ongoing on the demo vehicle and focusing on the market needs. The transmission is a modular concept which starts from a traditional 2-shaft...
This paper discusses manufacturing of integrated smart systems enabling novel functionalities for transportation field. An overview of the main challenging aspects for production based on flexible electronics building blocks is described. All the manufacturing value chain, needed for successful integration, will be evaluated concerning material and processes as well. As example of applications of...
Electric vehicles represent one of the most relevant innovations in the transportation sector. However, their adoption depends upon several factors, such as the presence of proper charging infrastructures. Given that the realization of charging infrastructures for electric vehicles - as it happens with any radical innovation - requires companies to adapt their business model, the paper analyzes a...
The electrification of vehicle offers the possibility of developing several powertrain layouts due to the use of more than one electric motor. If more than one motor is used to drive a single axle of the vehicle, it is extremely simple to develop torque vectoring based control strategies. In this paper, the effect of torque vectoring applied to different powertrain layouts for HEV is shown and analyzed.
The design of electric turbochargers is a challenging task because it requires a suitable compromise between mechanical, output power and thermal characteristics. The present paper motivates the use of hysteresis motors in this high-speed application. This choice is driven by the high mechanical strength, elevated working temperature and output power density of the semi-hard magnetic materials that...
Variable speed operation has been proposed in literature as a solution to efficiency and pollution problems for diesel generating units, as well to improve efficiency and power conversion in rotating systems for renewable energy sources. In general, different topologies of prime-movers, like internal combustion engines, wind turbines and hydro turbines, etc. can be used to move an electric generator...
This paper presents a 12V batteries modeling approach suitable for both lead acid and Li-ion batteries. In this work we have developed a simulation model, based on equivalent circuit models, of the lead acid and 12V Li-ion batteries in order to study their operating behavior. The trade-off between model accuracy and complexity is analyzed in order to obtain a proper model behavior under various operating...
We present a 3D-ranging camera based on the optical indirect Time-of-Flight technique, suitable for automotive applications. The camera is based on a 64×32-pixel chip, integrating a Single-Photon Avalanche Diode (SPAD) in each pixel, fabricated in an automotive-certified CMOS technology, and on an 808 nm active illuminator, emitting 1.5 W average optical power. Thanks to the SPAD single-photon sensitivity...
This paper presents an innovative lead acid battery, based on nanostructured active materials. Both charging time and specific energy are greatly enhanced in comparison with commercial lead acid battery. Starting from the extremely valuable performances of the nanostructured battery, also a circuital model, for application in electric vehicle traction, has been specifically developed. The circuital...
Nowadays in many countries, the increasing influence of sustainable mobility systems are influencing distribution networks, often characterized by a fragmented scenario in which diffuse generation (DG) in particular from not-programmable Renewable Energy Resources (RES) and storage technologies are causing both criticalities and new opportunities for the network operation. This paper considers the...
The electrification of the transport sector is one of the most promising solutions to mitigate the dependency from fossil fuels. At the distribution level, an uncoordinated management of electric vehicles (EVs) added to the high shares of intermittent RES could hinder security of supply and hide related economic benefits. To cope with these challenges, smart charging strategies and Vehicle-to-Grid...
Electric and hybrid powertrains may represent an interesting solution for small vans and other commercial vehicles, to be used in urban environment. Thanks to the rapid development of powertrain technologies, different technical solutions can be investigated. As consequence, it is important the development of tools and methodologies to analyse and compare quickly the different variants under study...
Electric field disturbances generated by automotive components are measured according to the Absorber Lined Shielded Enclosure (ALSE) test method, as defined in the international standard CISPR 25. An interlaboratory comparison, started on September 2016 and concluded on February 2017, identified the frequency range from 10 MHz to 50 MHz as the most problematic from the point of view of measurement...
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