Title :
Speed control for a Pseudo Direct Drive permanent magnet machine with one position sensor on low-speed rotor
Author :
Bouheraoua, Mohammed ; Jiabin Wang ; Atallah, K.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield, UK
Abstract :
The paper describes a novel approach to operate a Pseudo Direct Drive (PDD) permanent magnet (PM) machine with a single sensor on the low-speed rotor. Due to the magnetic coupling between its two rotors, the PDD machine exhibits torsional oscillation when a conventional drive is employed. While full state feedback control can effectively supress the torsional oscillation, its implementation requires two position/speed sensors: one on the high-speed rotor for electronic commutation, and the other on the low-speed rotor for speed/position control of the payload. This not only increases the drive system cost, but the need for fitting a position/speed sensor on the high-speed rotor imposes great constraints on the PDD mechanical design. A novel technique has been developed in order to control the PDD machine using a single sensor mounted on the low-speed rotor while the position and speed of the high-speed rotor needed for electronic commutation and state feedback control is estimated with an observer. The commutation signal is generated with a specially designed hardware to mimic a hardware resolver.
Keywords :
angular velocity control; feedback; machine control; motor drives; permanent magnet motors; conventional drive; electronic commutation; high-speed rotor; low speed rotor; magnetic coupling; position sensor; pseudodirect drive permanent magnet machine; speed control; state feedback control; torsional oscillation; Magnetomechanical effects; Observers; Oscillators; Rotors; Signal resolution; State feedback; Torque; Electric Drives; Genetic Algorithm; Magnetic Gear; PDD; Permanent Magnet Machines; Pseudo Direct Drive; State Feedback Controller;
Conference_Titel :
Electric Machines & Drives Conference (IEMDC), 2013 IEEE International
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-4975-8
Electronic_ISBN :
978-1-4673-4973-4
DOI :
10.1109/IEMDC.2013.6556217