A Discrete Current Controller for High Power-Density Synchronous Machines

Hongtai Ma, Li Li, Yingpeng Fan, Youguang Guo, Zhihui Jin and Jian Luo ()
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Hongtai Ma: Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China
Li Li: School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Yingpeng Fan: Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China
Youguang Guo: School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Zhihui Jin: Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China
Jian Luo: Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China

Energies, 2022, vol. 15, issue 17, 1-23

Abstract: This paper proposes a complex vector discrete current controller based on the flux-linkage data to solve the current loop oscillation problem of high power-density synchronous machines. An offline flux-linkage table measurement method considering cross saturation is introduced, and the data are used to deduce the symmetrical complex vector model. The influence of latch and delay of inverters on the line voltage of machines at high speed is analyzed and compensated during the controller design process. The proposed controller, which only needs to tune one parameter, can deal with the inductance mismatch issues caused by iron core saturation. The controller can be adopted in the current loop of saturated salient or nonsalient synchronous machines. Simulations and experiments have verified the effectiveness of the proposed method.

Keywords: synchronous machines; power density; digital current control; saturation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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