Sensorless Starting Control of Permanent Magnet Synchronous Motors with Step-up Transformer for Downhole Electric Drilling.

Huaidong Luo Zhixiong Li Quanli Zhang Huaidong Luo Hongwei Wang Jin Wang Fei Han Aiguo Wang Xicai Liu Xiaoming Yu Libing Zhou Sensorless Starting Control of Permanent Magnet Synchronous Motors with Step-up Transformer for Downhole Electric Drilling. 689-694 2018 IECON https://doi.org/10.1109/IECON.2018.8591852 conf/iecon/2018 db/conf/iecon/iecon2018.html#LiZLWWHWLYZ18 Fei Han Zhixiong Li Xicai Liu Aiguo Wang Hongwei Wang Jin Wang Xiaoming Yu Quanli Zhang Libing Zhou