论文信息 - Steps towards a sinusoidal back EMF for a claw pole transverse flux permanent magnet synchronous machine

Steps towards a sinusoidal back EMF for a claw pole transverse flux permanent magnet synchronous machine

This paper presents a new method to achieve an almost sinusoidal back EMF for a claw pole transverse flux permanent magnet synchronous machine (TFPM) using some appropriate geometrical modifications. To fulfill this goal, instead of using a constant length for the air gap, a rotor position dependent air gap is suggested. Air gap facing surfaces of the stator teeth and rotor flux concentrators are modified to build this variable air gap. It will be shown that in addition to proper shaping of the rotor poles, the air gap facing surface of the stator teeth should be curved to achieve a sinusoidal back EMF. Based on the obtained results from finite element analysis of the machine under no load condition, the proper shape of these surfaces is determined.

[1] Pragasen Pillay,et al. Modeling of permanent magnet motor drives , 1988 .

[2] A. Masmoudi, A. Elantably. An Approach to Sizing High Power Density TFPM Intended for Hybrid Bus Electric Propulsion , 2000 .

[3] Ahmed Masmoudi,et al. On the analysis and reduction of the cogging torque of a claw pole transverse flux permanent magnet machine , 2005 .

[4] B. Pevec,et al. Optimization of the transverse-flux motor based on design of experiments , 2009, 2009 International Conference on Power Electronics and Drive Systems (PEDS).

[5] A. Masmoudi,et al. Optimizing the overlap between the stator teeth of a claw pole transverse-flux permanent-magnet Machine , 2004, IEEE Transactions on Magnetics.

[6] Joon-Ho Lee,et al. Minimization of higher back-EMF harmonics in permanent magnet motor using shape design sensitivity with B-spline parameterization , 2003 .