TY - JOUR
T1 - Adaptive Full-Order Observer for Sensorless Variable Flux Reluctance Motor Drives Considering Field Current Adjustability and Stator Resistance Mismatch
AU - Liu, Bo
AU - Wu, Ting
AU - Wu, Xuan
AU - Yang, Meizhou
AU - Luo, Ling
AU - Lu, Kaiyuan
N1 - Publisher Copyright:
© 2024 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
PY - 2025
Y1 - 2025
N2 - —Variable reluctance motors with direct-current field windings in stator (DC-VFRM) offer advantages such as simple rotor structure and no rare earth. Moreover, sensorless control with adaptive full-order observer (AFO) can further reduce system cost and improve reliability. However, DC-VFRM has an adjustable field current, and more significant variations in stator resistance caused by factors such as temperature changes. If not handled properly, inappropriate field current and inaccurate stator resistance will result in position estimation error and instability. To solve these problems, a robust AFO considering field current adjustability and stator resistance mismatch is designed. First, an improved AFO structure and gain design criteria considering different field current amplitudes are given. Additionally, a stator resistance adaptation is used to enhance AFO. The decoupling conditions and gain analytical solution of the enhanced AFO are derived. Then, a field current control strategy is also proposed to improve the stability of AFO and reduce the position estimation error. Finally, the proposed method is carried on a 12/10 DC-VFRM experimental platform, demonstrating its ability to accurately identify stator resistance and improve position estimation accuracy, meanwhile achieve stable operation under different field current.
AB - —Variable reluctance motors with direct-current field windings in stator (DC-VFRM) offer advantages such as simple rotor structure and no rare earth. Moreover, sensorless control with adaptive full-order observer (AFO) can further reduce system cost and improve reliability. However, DC-VFRM has an adjustable field current, and more significant variations in stator resistance caused by factors such as temperature changes. If not handled properly, inappropriate field current and inaccurate stator resistance will result in position estimation error and instability. To solve these problems, a robust AFO considering field current adjustability and stator resistance mismatch is designed. First, an improved AFO structure and gain design criteria considering different field current amplitudes are given. Additionally, a stator resistance adaptation is used to enhance AFO. The decoupling conditions and gain analytical solution of the enhanced AFO are derived. Then, a field current control strategy is also proposed to improve the stability of AFO and reduce the position estimation error. Finally, the proposed method is carried on a 12/10 DC-VFRM experimental platform, demonstrating its ability to accurately identify stator resistance and improve position estimation accuracy, meanwhile achieve stable operation under different field current.
KW - Full-order Observer
KW - robust
KW - sensorless
KW - stator resistance adaptation
KW - variable flux reluctance machine
UR - http://www.scopus.com/inward/record.url?scp=85210531816&partnerID=8YFLogxK
U2 - 10.1109/TTE.2024.3505930
DO - 10.1109/TTE.2024.3505930
M3 - Journal article
AN - SCOPUS:85210531816
SN - 2332-7782
JO - IEEE Transactions on Transportation Electrification
JF - IEEE Transactions on Transportation Electrification
ER -