Influence of Control Structures and Load Parameters on Performance of a Pseudo Direct Drive

Machines

Mohammed Bouheraoua²  Jiabin Wang¹ 

[1] Department of Electronic and Electrical Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK; E-Mails:;Magnomatics Ltd, Park House, Bernard Road, Sheffield S2 5BQ, UK

关键词: permanent magnet machines;    electric drives;    genetic algorithm;    stability;    state feedback controller;    pseudo direct drive;    PDD;   

DOI  :  10.3390/machines2030158

来源: mdpi

【 摘 要 】

The paper describes an in-depth and systematic analysis of a pseudo direct drive permanent magnet machine in closed loop control. Due to the torque being transmitted from the high-speed rotor (HSR) to the low-speed rotor (LSR), through a relatively low stiffness magnetic gear with non-linear characteristics, speed oscillations appear in the drive output with a conventional proportional integral (PI) controller. Therefore two candidate controllers have been proposed as an alternative to the PI control and all controllers have been optimally tuned with a genetic algorithm against a defined criterion. Furthermore, closed loop models are established in the complex frequency domain to determine the system damping and the cause of the oscillations. Consequently, the best controller structure that improves the dynamic behaviour of the system in terms of speed tracking and disturbance rejection could be identified, based on the frequency domain analysis. Experimental results are presented to validate the analysis and the proposed control technique.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.