Adaptive Voltage Feedback Controllers on Nonsalient Permanent Magnet Synchronous Machine

• Published in: IEEE transactions on industry applications 2020-03, Vol.56 (2), p.1529-1542
• Main Authors: Wang, Chao, Zhu, Z. Q., Zhan, Hanlin
• Format: Article
• Language: English
• Subjects: Adaptive; Adaptive control; Control stability; Control systems design; conventional voltage feedback controller; current and voltage reference modifiers; Electric potential; Feedback control; Feedforward systems; Flux; flux weakening; Mathematical model; Modulation; overmodulation; Performance degradation; permanent magnet synchronous machine (PMSM); Permanent magnets; Scaling factors; stability; Synchronous machines; Torque; Viability; Voltage; Voltage control
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/TIA.2019.2957723

This article investigates the nonlinear behavior of the conventional voltage feedback flux-weakening control, i.e., the voltage magnitude feedback control on the nonsalient permanent magnet synchronous machine, and proposes an adaptive control parameter tuning method for the voltage feedback controller. Due to less voltage margin in the flux-weakening region, the current dynamic performance is degraded. This issue is more serious when the system operates in the overmodulation region and could affect the system's stability. Based on the designed voltage feedback controller, the system performance in the flux-weakening and overmodulation regions is further improved by utilizing the current and voltage reference modifiers. Consequently, the system can operate well in both linear and overmodulation regions with the specified scaling factor, which is beneficial to general-purpose applications. The viability of the proposed method is demonstrated by the experimental results.