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World Electr. Veh. J., Volume 16, Issue 9 (September 2025) – 2 articles

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18 pages, 6610 KiB  
Article
Design and Implementation of a Teaching Model for EESM Using a Modified Automotive Starter-Generator
by Patrik Resutík, Matúš Danko and Michal Praženica
World Electr. Veh. J. 2025, 16(9), 480; https://doi.org/10.3390/wevj16090480 - 22 Aug 2025
Abstract
This project presents the development of an open-source educational platform based on an automotive Electrically Excited Synchronous Machine (EESM) repurposed from a KIA Sportage mild-hybrid vehicle. The introduction provides an overview of hybrid drive systems and the primary configurations employed in automotive applications, [...] Read more.
This project presents the development of an open-source educational platform based on an automotive Electrically Excited Synchronous Machine (EESM) repurposed from a KIA Sportage mild-hybrid vehicle. The introduction provides an overview of hybrid drive systems and the primary configurations employed in automotive applications, including classifications based on power flow and the placement of electric motors. The focus is placed on the parallel hybrid configuration, where a belt-driven starter-generator assists the internal combustion engine (ICE). Due to the proprietary nature of the original control system, the unit was disassembled, and a custom control board was designed using a Texas Instruments C2000 Digital Signal Processor (DSP). The motor features a six-phase dual three-phase stator, offering improved torque smoothness, fault tolerance, and reduced current per phase. A compact Anisotropic Magneto Resistive (AMR) position sensor was implemented for position and speed measurements. Current sensing was achieved using both direct and magnetic field-based methods. The control algorithm was verified on a modified six-phase inverter under simulated vehicle conditions utilizing a dynamometer. Results confirmed reliable operation and validated the control approach. Future work will involve complete hardware testing with the new control board to finalize the platform as a flexible, open-source tool for research and education in hybrid drive technologies. Full article
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16 pages, 13677 KiB  
Article
Evolution of Characteristic Parameters in Fuel Cell Dynamic Response Under Durability Testing
by Zhexuan Qi, Xiangyang Chen, Ruidi Wang, Dong Hao, Wenlong Pan and Yongping Hou
World Electr. Veh. J. 2025, 16(9), 479; https://doi.org/10.3390/wevj16090479 - 22 Aug 2025
Abstract
The evolution of two key dynamic response parameters—undershoot voltage and stabilization time—was investigated throughout a 1000-h durability test on four distinct PEMFCs. Results demonstrate that cells with superior mass transport exhibited higher undershoot voltages, an effect amplified at higher current densities due to [...] Read more.
The evolution of two key dynamic response parameters—undershoot voltage and stabilization time—was investigated throughout a 1000-h durability test on four distinct PEMFCs. Results demonstrate that cells with superior mass transport exhibited higher undershoot voltages, an effect amplified at higher current densities due to a more pronounced gas supply-demand imbalance. Notably, the undershoot voltage decreased during the initial cell activation phase. Conversely, stabilization time showed no clear correlation with load magnitude but increased systematically with performance degradation. These findings reveal a strong connection between dynamic response characteristics and performance decay, providing meaningful insights for the design, application, and health assessment of high-performance fuel cells. Full article
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