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Research on an Axial/Radial-Axial Flux Compound-Structure Permanent-Magnet Synchronous Machine Used

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Tutor: ZhengPing
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: hybrid electric vehicle,axial/radial-axial flux,compound-structure,permanent-mag
CLC: TM341
Type: Master's thesis
Year:  2008
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Abstract:
Due to less traditional energy source and worse environmental protection problems, more countries around the world attach importance to the reduction of the fuel consumption and emission of the vehicle. The hybrid electric vehicle (HEV) is one alternative, which seems to fulfill the requirements without sacrificing performance or existing production facilities. HEV combines the strongpoint of the traditional vehicle and the battery electric vehicle and is the most successful electric vehicle type on the commercial market. The axial/radial- axial flux compound-structure permanent-magnet synchronous machine (CSPMSM) is the hardcore part of a novel series-parallel combined hybrid system, it can distribute the power flow of the internal combustion engine (ICE) and the battery to achieve the goal to reduce the consumption of the fuel.First, the design target should be made through the usage of the machine. Compared with the Toyota Prius, the basic operation mode of the HEV with CSPMSM system is analysed, and the design parameters of the CS-PMSM are derived from the operation mode, then the basic structure of the machine in the system can be got.Axial/radial-axial flux CSPMSM is an electrical machine made up of two combined electrical machines, the axial flux PMSM and the axial/radial flux PMSM, the characters of the magnetic circuit of the two machines are analysed, as the axial/radial flux PMSM is a new type machine, more work is done on it, a new equivalent magnetic circuit is drawn based on the characteristics of this machine, then the armature reactance formulas is deduced, the basic electromagnetic formula is deduced compared with the traditional radial flux machine.Axial/radial-axial flux CSPMSM is designed and the 3D model is calculated by the FEM method, then the machine is simply optimized. The fractional winding is used on the axial flux machine, and the magnetic coupling of the two machine is analysed based on the whole model built. At last, the advantage and disadvantage of the machine is summarized.
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