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

Author

Lim, Jong-Kyong, Gu, Bon-Gwan, Im, Seong-Hwan, and Kim, Rae-Young

Subjects
*INTERNAL combustion engines, *PERMANENT magnet motors, *STATORS, *ENERGY consumption
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. [ABSTRACT FROM AUTHOR]

Published
2023
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14. A vector control scheme for a PM linear synchronous motor in extended region

Author

Gu, Bon-Gwan and Nam, Kwanghee

Subjects
Vector control -- Analysis, Magnets, Permanent -- Usage, Business, Computers, Electronics, Electronics and electrical industries
Abstract

In an effort to increase strokes, we consider the control of a permanent-magnet linear synchronous motor (PMLSM) in an extended region where the armature winding is partially out of the PM field range. As the armature winding travels beyond the PM field range, the force output will be reduced while the force ripple increases. In this work, a back-electromotive-force model is established in the extended region, and an optimal control method is proposed. Experimental results demonstrate the effectiveness of the proposed method. Index Terms--Extended region, force ripple, permanent-magnet linear synchronous motor (PMLSM).

Published
2003

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