Fuzzy Logic Speed Control of Permanent Magnet Synchronous Machine and Feedback Voltage Ripple Reduction in Flux-Weakening Operation Region

Voltage feedback flux-weakening control has the advantages of simplicity and robustness against parameter variation. However, due to less voltage control margin in the flux-weakening region, the increased feedback voltage ripple could deteriorate the system performance in the flux-weakening region a...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2020-03, Vol.56 (2), p.1505-1517
Main Authors: Wang, Chao, Zhu, Z. Q.
Format: Article
Language:English
Subjects:
Adaptive control
Control systems design
Controllers
Electric potential
Feedback voltage ripple
Flux
flux-weakening
Fuzzy control
Fuzzy logic
fuzzy logic controller (FLC)
nonsalient PMSM
Parameter robustness
Performance enhancement
Permanent magnets
Proportional integral
Ripples
Speed control
speed proportional-integral (PI) controller
State feedback
Steady state
Synchronous machines
Voltage
voltage feedback controller
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Summary:Voltage feedback flux-weakening control has the advantages of simplicity and robustness against parameter variation. However, due to less voltage control margin in the flux-weakening region, the increased feedback voltage ripple could deteriorate the system performance in the flux-weakening region and may even cause oscillation. In this article, based on a nonsalient permanent magnet synchronous machine, the steady-state feedback voltage ripple in the flux-weakening region are analyzed first. It shows that the feedback voltage ripple caused by the current command ripple could dominate in some flux-weakening regions. Consequently, the speed bandwidth based on the conventional speed proportional-integral (PI) controller in the flux-weakening region can be hardly increased, which leads to poor dynamic performance. In order to obtain both fast speed dynamics and less steady-state ripple, especially in the flux-weakening region, an adaptive fuzzy logic (FLC) speed controller is designed and compared with the conventional speed PI controller. With the adaptive FLC, the dc-link voltage utilization can be increased and better flux-weakening capability can be obtained. Finally, the improved performances are verified by the experimental results.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2020.2967673