Design of Stator Winding Turn Number of Tap-Change PMSM for EVs According to Driving Cycles

Jong-Kyong Lim, Bon-Gwan Gu (), Seong-Hwan Im and Rae-Young Kim
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Jong-Kyong Lim: Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea
Bon-Gwan Gu: School of Energy Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
Seong-Hwan Im: POSCO, Pohang 37859, Republic of Korea
Rae-Young Kim: Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea

Energies, 2022, vol. 16, issue 1, 1-18

Abstract: Driving cycles are commonly used to evaluate the fuel efficiency and mileage of internal combustion engine vehicles and electric vehicles (EVs). To improve the mileage of EVs, efficient propulsion motors and inverters must be employed, particularly at frequently used speed and torque points of driving cycles. In this study, the number of the stator winding turns of a tap-change permanent magnet synchronous motor (PMSM) used for EV propulsion was investigated to increase the motor and inverter energy efficiencies under an urban dynamometer driving schedule (UDDS), a highway fuel economy test (HWFET), and combined UDDS/HWFET driving cycles. The motor core loss due to the carrier harmonics, copper loss, and inverter loss were analyzed for various winding turn number combinations, and the most efficient combination was selected. Based on the analysis results, the tap-change motor winding turns that exhibited the least loss were rewound on a PMSM of a mass-produced EV. The demand energy of the proposed tap-change PMSM and that of a mass-produced PMSM in the UDDS, HWFET, and combined UDDS/HWFET driving cycles were compared through experimentation. The proposed PMSM exhibited energy improvements of 1.50%, 1.84%, and 1.65%, respectively.

Keywords: tap-change motor; tap-changer; driving cycle; inverter loss; motor loss (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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