Improved Deadbeat-Direct Torque and Flux Control for PMSM With Less Computation and Enhanced Robustness

Deadbeat-direct torque and flux control (DB-DTFC) significantly improves the torque response performance compared with the conventional direct torque control. However, the existing DB-DTFC algorithm suffers from a relatively heavy computational burden due to its intricate derivation. Thus, two simpl...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2023-03, Vol.70 (3), p.2254-2263
Main Authors: Wang, Wusen, Liu, Chunhua, Zhao, Hang, Song, Zaixin
Format: Article
Language:English
Subjects:
Algorithms
Complex power
computational burden
deadbeat
Derivation
direct torque control (DTC)
disturbance observer
Disturbance observers
Electromagnetics
Mathematical models
Parameter modification
Parameter robustness
permanent magnet synchronous machine (PMSM)
Permanent magnets
Robustness
Robustness (mathematics)
Space vector pulse width modulation
Stators
Synchronous machines
Torque
Voltage control
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Summary:Deadbeat-direct torque and flux control (DB-DTFC) significantly improves the torque response performance compared with the conventional direct torque control. However, the existing DB-DTFC algorithm suffers from a relatively heavy computational burden due to its intricate derivation. Thus, two simplified DB-DTFC algorithms for permanent magnet synchronous machines (PMSMs) are proposed in this article to relieve the burden. The first one is based on the stator flux differential, and the second one is based on the complex power of PMSM. Furthermore, the performance of DB-DTFC highly relies on the accuracy of machine parameters. Thus, modified stator flux observer and electromagnetic torque observer are designed to enhance parameter robustness based on disturbance observer theory. The theoretical derivation of the proposed methods is investigated in-depth. Finally, both simulation and experimental results verify that the proposed deadbeat methods can maintain the deadbeat performances with a reduced computational burden. Meanwhile, the modified observer can help the deadbeat algorithms work well when machine parameters change.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2022.3170619