Open AccessEquivalent subdomain method for performance prediction of permanent magnet eddy current brakes
Author(s) -
Li Jiahao,
Yang Guolai
Publication year - 2021
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/elp2.12087
Subject(s) - eddy current , finite element method , equivalent circuit , eddy current brake , magnet , boundary value problem , enhanced data rates for gsm evolution , mechanics , control theory (sociology) , engineering , structural engineering , voltage , mathematical analysis , computer science , mechanical engineering , mathematics , physics , electrical engineering , control (management) , artificial intelligence , telecommunications
An equivalent subdomain method for calculating the performance parameters of permanent magnet eddy current brakes (ECB) is presented by combining subdomain technology with a magnetic equivalent circuit (MEC) model. The proposed method replaces the source term in the subdomain model with an equivalent current sheet applied to the boundary of an equivalent region. The relative permeability of the equivalent region is related to design parameters rather than infinite ones and is obtained by the MEC model considering the eddy current reaction. A small prototype experimental platform is established. The validity of the proposed method is verified by the experiment and the finite element method (FEM). The results show that the braking force predicted by the method match well with those obtained by the FEM without considering the edge effect, and are slightly larger than those measured by the experiment. Considering the static edge effect, the results of the proposed method agree well with the measured values and FEM results. The method also proves to be effective in the performance prediction of the ECB with different design parameters. In addition, the limitation of the proposed method is discussed in detail.