A Hybrid Observer for the Full-speed-range Sensorless Control of Interior Permanent Magnet Motor Drives
2014 IEEE Transportation Electrification Conference and Expo (ITEC)
This paper presents a method for the sensorless control in full speed range for an interior permanent-magnet synchronous motor (IPM). At standstill and very low speed region, high frequency (HF) injection technique is used to detect the rotor initial position. A hybrid observer is applied to realize a smooth transition from low to high speed. When the rotor speed goes up to a certain value where back EMF can provide adequate information, a back EMF observer will dominate. The hybrid observer is verified through simulation and experimental results using a three-phase 1-kW IPM motor drive.
Copyright © 2014, IEEE
Li, Yu; Taylor, Allan Ray; and Bai, Jua, "A Hybrid Observer for the Full-speed-range Sensorless Control of Interior Permanent Magnet Motor Drives" (2014). Electrical & Computer Engineering Presentations And Conference Materials. 5.