TY - CONF T1 - Improved sensorless operation of permanent magnet brushless AC motors based on online optimal efficiency control JO - IEEE International Electric Machines and Drives Conference PY - 2011/01/01 AU - Zhu ZQ AU - Gong LM ED - DO - DOI: 10.1109/IEMDC.2011.5994598 SP - 1591 EP - 1596 Y2 - 2025/01/03 ER -