Extending Winding Function Theory to Incorporate Secondary Effects in the Design of Induction Machines and Drives

Ge, Baoyun; Liu, Wenbo; Dong, J.; Liua, Mingda

doi:10.1109/JESTPE.2021.3054848

Extending Winding Function Theory to Incorporate Secondary Effects in the Design of Induction Machines and Drives

Journal article (2022)

Authors

Baoyun Ge C-Motive Technologies Inc.

Wenbo Liu Ford Motor Company

J. Dong DC systems, Energy conversion & Storage -

Mingda Liua Carpenter Technology Corporation

Research Group

DC systems, Energy conversion & Storage () (TU Delft)

DOI: https://doi.org/10.1109/JESTPE.2021.3054848

Iron Windings Rotors Stator windings Saturation magnetization Magnetic circuits Air gaps Flux Linkage Magnetic Circuit Network Saturation Effect Slot Effect Winding Function Theory

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Published Date

2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

High-performance electric drive applications necessitate a high fidelity model to predict the terminal characteristics of machines in the design stage to fulfill a system-level evaluation together with the converters. This article interprets winding function theory (WFT) from the field perspective and incorporates secondary effects, such as slotting and iron nonlinearity into it to accurately predict the main flux linkage in induction machines. The method is centered on resolving the magnetic scalar potential on the two sides of the air gap and computes the flux linkage via a winding function. Its performance is benchmarked against 2-D finite-element analysis (FEA) and the state-of-the-art magnetic equivalent circuit (MEC) method. Flux linkage and torque results indicate that the relative error is within 3.1% even in a highly saturated region when comparing to FEA, while MEC using the same circuit network may present a 20% error.

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