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All Journal Journal of Electrical Engineering and Computer (JEECOM)
I Chatur Adhi Wirya Aryadi
Universitas Mataram
Control & Systems Engineering Electrical & Electronics Engineering Energy

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Energy Efficiency and Performance of PMSM Drives in Electric Vehicles under Variable Loads I Ketut Wiryajati; I Made Mara; I Chatur Adhi Wirya Aryadi; Ida Ayu Sri Adnyani
Journal of Electrical Engineering and Computer (JEECOM) Vol 8, No 2 (2026)
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/jeecom.v8i2.16859

Abstract

This study evaluates the performance and energy efficiency of an electric vehicle powertrain based on a Permanent Magnet Synchronous Motor under varying speed and load conditions using a real-time monitoring system. Experiments were conducted at speeds of 10–40 km/h and loads of 50–200 kg, measuring voltage, current, power, efficiency, and specific energy consumption. Results show that efficiency increases significantly from approximately 66% at low speeds to over 90% at higher speeds, while specific energy consumption decreases from 118 Wh/km to around 60 Wh/km, indicating improved energy utilization. Load variation has a relatively minor effect on efficiency but contributes to higher current and power demand. Efficiency gradient analysis reveals a reduced rate of improvement at higher speeds, suggesting saturation effects and the presence of an optimal operating region. Measurement validation confirms low error levels (<5%), ensuring data reliability. Overall, the system demonstrates optimal performance at medium to high speeds with significantly enhanced energy efficiency.
Co-Authors I Ketut Wiryajati I.M. Mara Ida Ayu Sri Adnyani