TY - CONF T1 - Design and analysis of PM brushless ac machines with different rotor topologies for field-weakening operation JO - Proceedings of the Universities Power Engineering Conference PY - 1999/01/01 AU - Chen YS AU - Zhu ZQ AU - Howe D AU - Birch TS ED - VL - 1 SP - 169 EP - 172 Y2 - 2025/01/03 ER -