TY - JOUR T1 - Investigation on Operational Envelops and Efficiency Maps of Electrically Excited Machines for Electrical Vehicle Applications JO - IEEE Transactions on Magnetics PY - 2015/04/01 AU - Chu WQ AU - Zhu ZQ AU - Jian Zhang AU - Xu Liu AU - Stone DA AU - Foster MP ED - DO - DOI: 10.1109/tmag.2014.2359008 PB - Institute of Electrical and Electronics Engineers (IEEE) VL - 51 IS - 4 SP - 1 EP - 10 Y2 - 2025/04/10 ER -