An innovative natural air-cooling system technique for temperature-rise suppression on the permanent magnet synchronous machines

Abstract This paper investigates a three-dimensional finite-element (3D-FEA) thermal analysis based on an embedded cooling system with various number of ducts for the outer-rotor permanent magnet synchronous machines (PMSMs). The segmented stator core due to closed-slot topology is the reason of a high temperature-rise at this core. The application-oriented study is aimed to reduce temperature-rise of the conventional model at the stator core via radial and circumferential airflow ducts. A temperature distribution, and heat transfer comparison among all FE models such as conventional, two and four ducts in-core natural cooling systems will be comprehensively presented through freezing the electromagnetic performance. The alternative models using FEA, and computational fluid dynamic (CFD) are experimentally verified the innovative technique, in which the generator is operated by a vertical axis twisted savonius type wind turbine (VAWT).

[1]  Hongfeng Li,et al.  Thermal Analysis of the Permanent-Magnet Spherical Motor , 2015, IEEE Transactions on Energy Conversion.

[2]  Weiguo Liu,et al.  Thermal analysis and comparison of permanent magnet motor and generator , 2011, 2011 International Conference on Electrical Machines and Systems.

[3]  Tsuyoshi Murata,et al.  {m , 1934, ACML.

[4]  David G. Dorrell,et al.  Comparison of different motor design drives for hybrid electric vehicles , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[5]  Alberto Tenconi,et al.  Temperatures Evaluation in an Integrated Motor Drive for Traction Applications , 2006, IEEE Transactions on Industrial Electronics.

[6]  A. Mebarki,et al.  Improved synchronous machine thermal modelling , 2008, 2008 18th International Conference on Electrical Machines.

[7]  Andrea Cavagnino,et al.  End Space Heat Transfer Coefficient Determination for Different Induction Motor Enclosure Types , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[8]  Andrea Cavagnino,et al.  Convection Heat Transfer and Flow Calculations Suitable for Electric Machines Thermal Models , 2008, IEEE Transactions on Industrial Electronics.

[9]  Jianguo Zhu,et al.  Techniques for Multilevel Design Optimization of Permanent Magnet Motors , 2015, IEEE Transactions on Energy Conversion.

[10]  Andrea Cavagnino,et al.  Conjugate Heat Transfer Analysis of Integrated Brushless Generators for More Electric Engines , 2014 .

[11]  A. Boglietti,et al.  Determination of Critical Parameters in Electrical Machine Thermal Models , 2007 .

[12]  P ? ? ? ? ? ? ? % ? ? ? ? , 1991 .

[13]  Juha Pyrhonen,et al.  Direct liquid cooling for an outer-rotor direct-drive permanent-magnet synchronous generator for wind farm applications , 2015 .

[14]  Erkan Mese,et al.  A multidisciplinary design approach for electromagnetic brakes , 2016 .

[15]  Jianguo Zhu,et al.  Thermal Analysis of High-Speed SMC Motor Based on Thermal Network and 3-D FEA With Rotational Core Loss Included , 2009, IEEE Transactions on Magnetics.

[16]  D.M. Ionel,et al.  Computation of Core Losses in Electrical Machines Using Improved Models for Laminated Steel , 2006, IEEE Transactions on Industry Applications.

[17]  Oleg Wasynczuk,et al.  Hierarchically Partitioned Finite-Element Analysis of Rotating Electrical Machinery , 2015, IEEE Transactions on Energy Conversion.

[18]  Andrea Cavagnino,et al.  Solving the more difficult aspects of electric motor thermal analysis in small and medium size industrial induction motors , 2005 .

[19]  R. Wrobel,et al.  Thermal Modeling of a Segmented Stator Winding Design , 2011, IEEE Transactions on Industry Applications.

[20]  Y.K. Chin,et al.  Transient thermal analysis using both lumped-circuit approach and finite element method of a permanent magnet traction motor , 2004, 2004 IEEE Africon. 7th Africon Conference in Africa (IEEE Cat. No.04CH37590).

[21]  Andrea Cavagnino,et al.  Evolution and Modern Approaches for Thermal Analysis of Electrical Machines , 2009, IEEE Transactions on Industrial Electronics.

[22]  Yang Zhan,et al.  Influence of stator slot shape on temperature in surface mounted permanent magnet machines , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[23]  Irma Villar,et al.  Experimental validation of an enhanced permeance network model for embedded magnet synchronous machines , 2016 .

[24]  M. Gabsi,et al.  Comparative Studies Between Classical and Mutually Coupled Switched Reluctance Motors Using Thermal-Electromagnetic Analysis for Driving Cycles , 2011, IEEE Transactions on Magnetics.

[25]  Dallas D. Hill,et al.  Development and Validation of a Thermal Model for Electric Induction Motors , 2010, IEEE Transactions on Industrial Electronics.

[26]  Ming Cheng,et al.  Thermal Analysis and Cooling System Design of Dual Mechanical Port Machine for Wind Power Application , 2013, IEEE Transactions on Industrial Electronics.

[27]  Yang Shen,et al.  Analytical optimisation of external rotor permanent magnet machines , 2013 .

[28]  H. Petersson,et al.  Introduction to the finite element method , 1992 .

[29]  Marco Tursini,et al.  A switched-reluctance motor for aerospace application: Design, analysis and results , 2017 .

[30]  Frédéric Wurtz,et al.  An optimization-oriented sizing model for brushless doubly fed reluctance machines: Development and experimental validation , 2016 .

[31]  Adrian Plesca.  Thermal analysis of a traction system with double conducting points in steady state conditions , 2013 .