Optimization of Magnetic Circuit for Brushless Doubly Fed Machines

This paper presents an optimized design method for the magnetic circuit of brushless doubly fed machines (BDFMs). The BDFM is an attractive electrical machine, particularly for wind power applications, as a replacement for doubly fed slip-ring generators. This study shows that the conventional design methods for the BDFM stator and rotor back iron can be modified, leading to a lighter and smaller machine. The proposed design concepts are supported by analytical methods, and their practicality is verified using two-dimensional finite-element modeling and analysis. Two BDFMs with frame sizes D180 and D400 are considered in this study.

[1]  Valéria Hrabovcová,et al.  Design of Rotating Electrical Machines , 2009 .

[2]  Mariusz Jagiela,et al.  The BDFM as a Generator in Wind Turbines , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[3]  A.K. Wallace,et al.  Experimental evaluation of a variable-speed, doubly-fed wind-power generation system , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[4]  P. C. Roberts,et al.  Performance of the bdfm as a generator and motor , 2005 .

[5]  Peter Tavner,et al.  Characterising brushless doubly fed machine rotors , 2013 .

[6]  Xuefan Wang,et al.  Design of a Low-Harmonic-Content Wound Rotor for the Brushless Doubly Fed Generator , 2014, IEEE Transactions on Energy Conversion.

[7]  Ehsan Abdi-Jalebi.  Modelling and instrumentation of Brushless Doubly-Fed (induction) Machines , 2007 .

[8]  A. C. Ferreira,et al.  Generalised theory of the brushless doubly-fed machine , 1997 .

[9]  Peter Tavner,et al.  Performance analysis and testing of a 250 kW medium-speed brushless doubly-fed induction generator , 2013 .

[10]  Shiyi Shao,et al.  Stable Operation of the Brushless Doubly-Fed Machine (BDFM) , 2007, 2007 7th International Conference on Power Electronics and Drive Systems.

[11]  Peter Tavner,et al.  Design and testing of a 250 kW medium-speed Brushless DFIG , 2012 .

[12]  Peter Tavner,et al.  Wind turbine productivity considering electrical subassembly reliability. , 2010 .

[13]  F. Creedy,et al.  Some developments in multi-speed cascade induction motors , 1921 .

[14]  A.R.W. Broadway,et al.  Corrigendum: Self-cascaded machine: a low-speed motor or high-frequency brushless alternator , 1970 .

[15]  A. Wallace,et al.  Generalized Theory of the Brushless Doubly-Fed Machine. Part 1: Analysis , 1997 .

[16]  N. Sadowski,et al.  Finite-element analysis of a double-winding induction motor with a special rotor bars topology , 2004, IEEE Transactions on Magnetics.

[17]  Longya Xu,et al.  Design of a doubly-fed reluctance motor for adjustable speed drives , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[18]  Ehsan Abdi,et al.  Equivalent Circuit Parameters for Large Brushless Doubly Fed Machines (BDFMs) , 2014, IEEE Transactions on Energy Conversion.

[19]  Longya Xu,et al.  Design and performance analysis of a doubly excited brushless machine for wind power generator application , 2010, The 2nd International Symposium on Power Electronics for Distributed Generation Systems.

[20]  Alan K. Wallace,et al.  Adjustable speed drive and variable speed generation systems with reduced power converter requirements , 1993, ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings.

[21]  H. Voltolini,et al.  Performance Analysis with Power Factor Compensation of a 75 kW Brushless Doubly Fed Induction Generator Prototype , 2007, 2007 IEEE International Electric Machines & Drives Conference.

[22]  R.A. McMahon,et al.  Design of the Brushless Doubly-Fed (Induction) Machine , 2007, 2007 IEEE International Electric Machines & Drives Conference.