Control strategy for permanent magnet synchronous motor with contra‐rotating rotors under unbalanced loads condition. Issue 1 (1st January 2015)

• Record Type: Journal Article
• Authors: Cheng, Shuangyin; Luo, Derong; Huang, Shoudao; Chen, Zhe; Huang, Keyuan
• Is Part Of: IET electric power applications. Volume 9:Issue 1(2015)
• Page Start: 71
• Page End: 79
• Publication Date: 2015-01-01
• Subjects: permanent magnet motors -- synchronous motors -- machine control -- rotors -- invertors -- mathematical analysis -- stability -- load regulation -- reliability -- starting -- digital signal processing chips -- machine testing; permanent magnet synchronous motor -- contrarotating rotor -- unbalanced load condition -- axial‐flux permanent magnet synchronous machine -- PMSM -- inverter -- mathematic model -- motor starting -- ship -- underwater vehicle propulsion -- DSP 28335 processor -- power 1.2 kW; Electric power -- Periodicals; Electric power systems -- Periodicals; 621.305
• DOI: 10.1049/iet-epa.2014.0130
• Languages: English
• ISSNs: 1751-8660

Abstract

Abstract : This study presents an investigation into the control of an axial‐flux permanent magnet synchronous machine (PMSM) with contra‐rotating rotors fed by a single inverter, which corresponds to two PMSM connected in series. In this study, the mathematic model of the PMSM with contra‐rotating rotors is developed and the instability of the system with unbalanced loads is analysed. Based on the analysis, a control strategy which can keep synchronism of the two rotors under varying load is implemented. In addition, a method for starting the motor reliably is proposed, which is applicable to ship or under water vehicle propulsions. The control strategy is implemented on a DSP 28335 processor featured hardware platform and is tested on a 1.2 kW prototype machine. Experimental results validate the correctness of the analysis and control strategy.