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Operating Point Selected Flux-Weakening Control of Induction Motor for Torque-Improved High-Speed Operation Under Multiple Working Conditions.
- Source :
-
IEEE Transactions on Power Electronics . Dec2019, Vol. 34 Issue 12, p12011-12023. 13p. - Publication Year :
- 2019
-
Abstract
- Due to the requirements of multiple working conditions for induction motor in high-speed flux-weakening operation, conventional “maximum torque oriented” flux-weakening controller reveals its own limitations. This paper focuses on holistic torque performance optimization for multi-condition operation. Torque ripple and dynamic response under two kinds of specific working conditions (high-speed braking and load step change) are explicitly analyzed. The theoretically precise maximum torque point is derived to extract the possible output torque for deep flux-weakening operation. Further, an operating point selected flux-weakening controller (OPS-FC) is proposed. It retains the maximum output torque capability for step acceleration and full-load conditions, as well as holding other novel features for the changing working conditions. First, the selected operating point is automatically manipulated for torque ripple alleviation under non-maximum torque condition. Second, since the voltage reference in proposed OPS-FC is directly constructed, the system robustness is enhanced. Finally, speed range is extended to the deep flux-weakening operation, and the complex vector decoupling part of d-axis current regulator is first applied and shared as a flux-weakening path for closed-loop control. Hence, the complicated PI regulator tuning is averted. The proposed scheme is experimentally verified on a 3.7 kW commercial platform. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 34
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 138593138
- Full Text :
- https://doi.org/10.1109/TPEL.2019.2905536