Abstract
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.
Highlights
In recent years, there has been increasing attention paid to the electrification of non-road mobile machinery, with a particular focus on the machinery involved in construction and agricultural applications [1]
The analysis presented in the previous section fulfilled the purpose of investigating the performance requirements for the electric motor
The recent introduction of strict emission regulations has increased the interest in new technologies
Summary
There has been increasing attention paid to the electrification of non-road mobile machinery, with a particular focus on the machinery involved in construction and agricultural applications [1]. There has been increasing interest in the introduction of stricter regulations for Internal Combustion Engine (ICE) installed in non-road mobile machinery, which requires lower emissions and higher efficiency. V”; from 2020, all power size engines must meet Stage V requirements. These new limits require the adoption of additional components In the category of construction machinery, various types of solutions have been proposed, such as the electrification of the drive train or the electrification of the hydraulic system [3,4], and some solutions have been already adopted in commercialized machinery. Some studies have been carried out including a feasibility evaluation of full-electric vehicles, the electrification of auxiliaries, and traction electrification with in-wheel motors [5,6,7]
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