TY - GEN

T1 - Optimization of IM Rotor Bars Inclination Angle using Analytical Model in Free FEA Software

AU - To, Thanh Tung

AU - Roshandel, Emad

AU - Mahmoudi, Amin

AU - Cao, Zhi

AU - Kahourzade, Solmaz

PY - 2021

Y1 - 2021

N2 - The performance of the induction motors (IMs) in transient and steady-state operation can be adjusted by inclination of the rotor bars to some extent. This paper proposes an augmented analytical approach using free finite-element analysis software to study the effect of the inclination angle on the performance of IMs. The electric equivalent circuit (EEC) parameters, except the rotor leakage inductance, are found from the existing sizing equations. A such, the paper offers new equation for estimation of the rotor side leakage inductance. The magnetostatic analysis is employed using free FEMM Software to find the saturation level of the studied IMs. The calculation of the saturation level is used to estimate the rotor side and magnetization inductance with higher accuracy. The proposed model accuracy is validated against FEA. An optimization problem is defined to maximize the efficiency, starting torque, and rated torque with a certain weighting. The optimum inclination angle is determined using the developed augmented analytical model (AAM). The performance of the optimal design for two different classes of the IMs (i.e., Class A and Class B) are compared against the IMs with zero-inclination rotor bar angle. The results show the effectiveness of the calculation of optimal inclination angle for the IMs.

AB - The performance of the induction motors (IMs) in transient and steady-state operation can be adjusted by inclination of the rotor bars to some extent. This paper proposes an augmented analytical approach using free finite-element analysis software to study the effect of the inclination angle on the performance of IMs. The electric equivalent circuit (EEC) parameters, except the rotor leakage inductance, are found from the existing sizing equations. A such, the paper offers new equation for estimation of the rotor side leakage inductance. The magnetostatic analysis is employed using free FEMM Software to find the saturation level of the studied IMs. The calculation of the saturation level is used to estimate the rotor side and magnetization inductance with higher accuracy. The proposed model accuracy is validated against FEA. An optimization problem is defined to maximize the efficiency, starting torque, and rated torque with a certain weighting. The optimum inclination angle is determined using the developed augmented analytical model (AAM). The performance of the optimal design for two different classes of the IMs (i.e., Class A and Class B) are compared against the IMs with zero-inclination rotor bar angle. The results show the effectiveness of the calculation of optimal inclination angle for the IMs.

KW - Analytical model

KW - finite-element analysis

KW - induction motor design

KW - optimization design

KW - rotor bar inclination

UR - http://www.scopus.com/inward/record.url?scp=85119989261&partnerID=8YFLogxK

U2 - 10.1109/ECCE47101.2021.9595153

DO - 10.1109/ECCE47101.2021.9595153

M3 - Conference contribution

AN - SCOPUS:85119989261

T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

SP - 4119

EP - 4126

BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021

Y2 - 10 October 2021 through 14 October 2021

ER -