2015 3rd International Conference on Artificial Intelligence, Modelling and Simulation (AIMS), 2015
The Brushless Doubly Fed Reluctance Machine (BDFRM) is a type variable speed machine with two set... more The Brushless Doubly Fed Reluctance Machine (BDFRM) is a type variable speed machine with two sets of windings. One set is fed from a variable frequency inverter while the second set is fed at constant frequency. Comparing with the traditional induction machine, BDFRM has simple structure and higher efficiency, higher power density, smaller size and lower maintenance cost. So, it is important to build an accurate dynamic model of BDFRM for many control method studies. This paper presents mathematical model for a dynamic model of BDFRM using d-q reference coordination system and the simulation model be designed on Matlab/Simulink®.
2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012
This paper investigates the rotor design factors that impact the performance of brushless doubly-... more This paper investigates the rotor design factors that impact the performance of brushless doubly-fed reluctance machines (BDFRMs). The performance of the BDFRM relies on the ability of the rotor structure to modulate stator magnetic fields so that magnetic coupling occurs between stator windings that do not otherwise interact. This paper investigates those factors that create the desired magnetic coupling and those that can cause undesirable magnetic performance. Theoretical analysis is compared to test results from an early prototype BDFRM and then applied to the design of a new BDFRM. New designs are explored using Finite Element Analysis. A prototype, based on these investigations is under construction.
ABSTRACT The brushless doubly-fed reluctance machine has two sets of stator windings of different... more ABSTRACT The brushless doubly-fed reluctance machine has two sets of stator windings of different pole number linked by a reluctance type of rotor. The rotor modulates the stator MMF from one winding so that flux links the other winding creating mutual coupling. This is still a research machine and the design methodology is under development. Past works indicates that a ducted rotor with radial laminations is best suited to be the reluctance rotor. In this paper the geometry of the rotor is investigated. If the ducts are too thin then the reluctance ratio is low and the coupling is affected. If they are too wide then the reluctance path for the coupling flux is high and the machine will saturate quickly. It is found, using finite element analysis, that the duct ratio should be about 38% from the results in the paper. This is in line with previous work on synchronous reluctance machines that can also use ducted rotors (although they use axial lamination which are inappropriate for this application).
2015 3rd International Conference on Artificial Intelligence, Modelling and Simulation (AIMS), 2015
The Brushless Doubly Fed Reluctance Machine (BDFRM) is a type variable speed machine with two set... more The Brushless Doubly Fed Reluctance Machine (BDFRM) is a type variable speed machine with two sets of windings. One set is fed from a variable frequency inverter while the second set is fed at constant frequency. Comparing with the traditional induction machine, BDFRM has simple structure and higher efficiency, higher power density, smaller size and lower maintenance cost. So, it is important to build an accurate dynamic model of BDFRM for many control method studies. This paper presents mathematical model for a dynamic model of BDFRM using d-q reference coordination system and the simulation model be designed on Matlab/Simulink®.
2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012
This paper investigates the rotor design factors that impact the performance of brushless doubly-... more This paper investigates the rotor design factors that impact the performance of brushless doubly-fed reluctance machines (BDFRMs). The performance of the BDFRM relies on the ability of the rotor structure to modulate stator magnetic fields so that magnetic coupling occurs between stator windings that do not otherwise interact. This paper investigates those factors that create the desired magnetic coupling and those that can cause undesirable magnetic performance. Theoretical analysis is compared to test results from an early prototype BDFRM and then applied to the design of a new BDFRM. New designs are explored using Finite Element Analysis. A prototype, based on these investigations is under construction.
ABSTRACT The brushless doubly-fed reluctance machine has two sets of stator windings of different... more ABSTRACT The brushless doubly-fed reluctance machine has two sets of stator windings of different pole number linked by a reluctance type of rotor. The rotor modulates the stator MMF from one winding so that flux links the other winding creating mutual coupling. This is still a research machine and the design methodology is under development. Past works indicates that a ducted rotor with radial laminations is best suited to be the reluctance rotor. In this paper the geometry of the rotor is investigated. If the ducts are too thin then the reluctance ratio is low and the coupling is affected. If they are too wide then the reluctance path for the coupling flux is high and the machine will saturate quickly. It is found, using finite element analysis, that the duct ratio should be about 38% from the results in the paper. This is in line with previous work on synchronous reluctance machines that can also use ducted rotors (although they use axial lamination which are inappropriate for this application).
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Papers by William Song