TY - GEN
T1 - Optimization of shield thickness of finite length rotors for Eddy current loss minimization
AU - Shah, Manoj R.
AU - Lee, Sang Bin
PY - 2006
Y1 - 2006
N2 - A high conductivity shield is often used for coating the rotor of solid rotor synchronous machines for reducing the surface eddy current losses due to the armature reaction space and time harmonics and/or tooth ripple. Since the design process for determining the optimal shield thickness can be very complicated and time-consuming, a simple analytical model based on Maxwell's equations was developed and presented in a previous paper to simplify the process. It has been shown that such an analytical tool can be used as an effective "screening tool" for determining the optimal shield thickness for minimizing rotor surface losses. In this paper, the design process is further refined by employing a special finite element method that accounts for the impact of finite axial length of the rotor. A number of comparisons are made between the analytical and the finite element results for significant space and time harmonic combinations to verify the validity of the proposed approach and to quantify the impact of the finite length of solid rotors.
AB - A high conductivity shield is often used for coating the rotor of solid rotor synchronous machines for reducing the surface eddy current losses due to the armature reaction space and time harmonics and/or tooth ripple. Since the design process for determining the optimal shield thickness can be very complicated and time-consuming, a simple analytical model based on Maxwell's equations was developed and presented in a previous paper to simplify the process. It has been shown that such an analytical tool can be used as an effective "screening tool" for determining the optimal shield thickness for minimizing rotor surface losses. In this paper, the design process is further refined by employing a special finite element method that accounts for the impact of finite axial length of the rotor. A number of comparisons are made between the analytical and the finite element results for significant space and time harmonic combinations to verify the validity of the proposed approach and to quantify the impact of the finite length of solid rotors.
KW - AC machines
KW - Analytical and numerical harmonic analyses
KW - Eddy currents
KW - Electro-magnetic shielding
KW - Rotor surface losses
KW - Solid rotor
KW - Synchronoous machines
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U2 - 10.1109/IAS.2006.256872
DO - 10.1109/IAS.2006.256872
M3 - Conference contribution
AN - SCOPUS:34948841552
SN - 1424403642
SN - 9781424403646
T3 - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
SP - 2368
EP - 2373
BT - Conference Record of the 2006 IEEE Industry Applications Conference - Forty-First IAS Annual Meeting
T2 - 2006 IEEE Industry Applications Conference - Forty-First IAS Annual Meeting
Y2 - 8 October 2006 through 12 October 2006
ER -