Performance Evaluation Criteria for Single-Motor Electric Tractors

Highlights Evaluation criteria for single-motor electric tractors were adapted from OECD Code 2 to reflect electric drivetrain characteristics. Five evaluation points were proposed to estimate battery current and operating time under realistic load–speed conditions. The proposed evaluation criteria enable objective comparison of performance across electric tractor models. ABSTRACT. Electric tractors have emerged as environmentally sustainable alternatives to engine-driven tractors. However, standardized performance evaluation criteria tailored to electric powertrains have not yet been established. A commercial electric tractor was tested using a dynamometer-based setup to obtain motor power, torque, battery voltage, and current data. Although the existing OECD Code 2 procedure is applicable for determining maximum effective power, its current measurement approach cannot be applied to electric tractors, as the traction motor does not exhibit torque-rise behavior below the rated speed. Analysis of the measured data showed that battery current varied significantly only in the constant-power region corresponding to practical operating speeds. Based on these findings, five test points were proposed for evaluating battery current consumption and estimating operating time. These criteria improve the reliability of current measurements and provide a consistent basis for comparing electric tractors. The results highlight the need for standardized evaluation procedures tailored to electric powertrains, and future work will include temperature-dependent testing to further enhance the accuracy of SOC-based performance assessments.