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Title: Cogging torque minimization in transverse flux machines

Abstract

This study presents the design considerations in cogging torque minimization in two types of transverse flux machines. The machines have a double stator-single rotor configuration with flux concentrating ferrite magnets. One of the machines has pole windings across each leg of an E-Core stator. Another machine has quasi-U-shaped stator cores and a ring winding. The flux in the stator back iron is transverse in both machines. Different methods of cogging torque minimization are investigated. Key methods of cogging torque minimization are identified and used as design variables for optimization using a design of experiments (DOE) based on the Taguchi method. A multi-level DOE is proposed as an optimization method to reach an optimum solution with minimum simulations. The case study is analyzed in a two level DOE optimization. Finite element analysis is used to study the different effects. Two prototypes are fabricated for validating the FEA results.

Authors:
 [1];  [1];  [1];  [2];  [3]
  1. The Univ. of Akron, Akron, OH (United States)
  2. North Carolina State Univ., Raleigh, NC (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1475123
Report Number(s):
NREL/JA-5D00-72491
Journal ID: ISSN 0093-9994
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Industry Applications
Additional Journal Information:
Journal Volume: 55; Journal Issue: 1; Journal ID: ISSN 0093-9994
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; cogging torque reduction; design of experiment; optimization; PM machine; review; transverse flux machine

Citation Formats

Husain, Tausif, Hasan, Iftekhar, Sozer, Yilmaz, Husain, Iqbal, and Muljadi, Eduard. Cogging torque minimization in transverse flux machines. United States: N. p., 2018. Web. doi:10.1109/TIA.2018.2868541.
Husain, Tausif, Hasan, Iftekhar, Sozer, Yilmaz, Husain, Iqbal, & Muljadi, Eduard. Cogging torque minimization in transverse flux machines. United States. doi:10.1109/TIA.2018.2868541.
Husain, Tausif, Hasan, Iftekhar, Sozer, Yilmaz, Husain, Iqbal, and Muljadi, Eduard. Mon . "Cogging torque minimization in transverse flux machines". United States. doi:10.1109/TIA.2018.2868541. https://www.osti.gov/servlets/purl/1475123.
@article{osti_1475123,
title = {Cogging torque minimization in transverse flux machines},
author = {Husain, Tausif and Hasan, Iftekhar and Sozer, Yilmaz and Husain, Iqbal and Muljadi, Eduard},
abstractNote = {This study presents the design considerations in cogging torque minimization in two types of transverse flux machines. The machines have a double stator-single rotor configuration with flux concentrating ferrite magnets. One of the machines has pole windings across each leg of an E-Core stator. Another machine has quasi-U-shaped stator cores and a ring winding. The flux in the stator back iron is transverse in both machines. Different methods of cogging torque minimization are investigated. Key methods of cogging torque minimization are identified and used as design variables for optimization using a design of experiments (DOE) based on the Taguchi method. A multi-level DOE is proposed as an optimization method to reach an optimum solution with minimum simulations. The case study is analyzed in a two level DOE optimization. Finite element analysis is used to study the different effects. Two prototypes are fabricated for validating the FEA results.},
doi = {10.1109/TIA.2018.2868541},
journal = {IEEE Transactions on Industry Applications},
number = 1,
volume = 55,
place = {United States},
year = {2018},
month = {9}
}

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