Journal
ENERGIES
Volume 13, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/en13092197
Keywords
agricultural electric motor; electric agricultural tractor; hybrid agricultural tractor; non-road mobile machinery; specialized tractor
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Funding
- MIUR [2017SW5MRC]
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The focus of this paper is the potential electrification of specialized agricultural tractors involved in vineyards and orchards. This category of machinery has not received research attention to date; however, regulations are encouraging lower emissions and higher efficiency, requiring the adoption of new technologies. Traction makes up only a limited part of this application, and the working cycle is not trivial; therefore, the design of the system is not straightforward. This study takes advantage of experimental measurements carried out under real operating conditions on a traditional specialized tractor, which was chosen as performance target. The performance requirements of the hybrid powertrain components are investigated, with particular focus placed on the electric motor. According to the dimension constraints, the design of the electric motor is carried out considering the requirements in terms of its thermal-equivalent torque and overload capability. The results are validated through a detailed thermal simulation under real duty cycles.
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