Open AccessAnalytical model for magnetic‐geared double‐rotor machines and its d–q ‐axis determination
Author(s) -
Zhao Hang,
Liu Chunhua,
Song Zaixin,
Liu Senyi,
Lubin Thierry
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2019.0597
Subject(s) - counter electromotive force , rotor (electric) , torque , finite element method , electromotive force , control theory (sociology) , inductance , magnetic flux , maxwell's equations , magnetic potential , physics , synchronous motor , mathematical analysis , computer science , magnetic field , mathematics , voltage , control (management) , quantum mechanics , artificial intelligence , thermodynamics
This study presents an analytical sub‐domain model for the prediction of various electromagnetic parameters of magnetic‐geared double‐rotor machine (MGDRM). By dividing the MGDRM into six sub‐domains and solving the Maxwell equations in polar coordinates for each region, the vector magnetic potential distribution can be derived. Subsequently, the flux density distribution, back electromotive force, and output torque, can be calculated. Furthermore, based on the proposed model, the equivalent d – q ‐axis is elaborated. Also, the corresponding d and q inductance can be obtained. It proves that the MGDRM can be regarded as a non‐salient‐pole synchronous machine. Besides, the power factor of the MGDRM under i d = 0 control is deduced and optimised for the different thicknesses of modulators. In addition, the demagnetisation capability is analysed by adopting the sub‐domain model. Finally, the accuracy of proposed sub‐domain model for MGDRMs is validated via the finite‐element method (FEM).