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Halbach motors have attracted lots of attention in novel ship propelling and ocean current generators as they have much dominance. Under the condition of ideal ferromagnetic material and slotless stators, randomly magnetized Halbach array is considered as an equivalence of two 90° Halbach (180° Halbach) arrays, and a new analytic method is proposed in this paper to analyze the randomly magnetized Halbach motors. Fourier series of magnetic scalar potential is calculated, and the expression of air-gap flux density of a 90° Halbach motor is given in polar coordinate system. On the basis of calculations above, the magnetization intensity expression of a randomly magnetized Halbach motor in a pole, and the air-gap flux density distribution of randomly magnetized Halbach motor are obtained; and the relationship of air-gap flux density between the numbers of poles, permanent magnet thickness as well as magnetizing angle are analyzed. The finite element method and experimental results verify the effectiveness of the methods above.
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Keywords:
- discrete Halbach motor /
- random magnetization /
- vector equivalence /
- analytic model
[1] Atallah K, Howe D 1998 IEEE Transactions on Magnetics 34 2060
[2] Zhu Z Q, Howe D 2001 IEEE Transactions on Magnetics 12 1016
[3] Zhu Z Q, Xia Z P, Shi Y F 2003 IEEE Transactions on Magnetics 39 2992
[4] Xia C L, Li H F, Shi T N 2008 IEEE Transactions on Magnetics 44 2016
[5] Wang H, Ye Y, Wang Q, Dai Y, Yu Y, Weng P 2006 IEEE Transactions on Appl. Supercond. 16 1562
[6] Seok-Myeong Jang, Sung-Ho Lee 2002 IEEE Transactions on Magnetics. 38 3261
[7] Yan L, Zhang L, Wang T Y 2009 IEEE Transactions on Magnetics. 43 2036
[8] Suman Dwari, Leila Parsa 2011 IEEE Transactions on Magnetics. 58 3768
[9] Zhu Z Q, Xia Z P, Howe D 2002 IEEE Transactions on Magnetics. 38 2997
[10] Fan J J, Wu J H 2010 Proceeding of the CSEE 30 98 (in China) [范坚坚, 吴建华 2010 中国电机工程学报 30 98]
[11] Praveen R P, Ravichandran 2012 IEEE Transactions on Industrial Electronics 59 3553
[12] Shi T, Qiao Z Q, Xia C L 2012 IEEE Transactions on Magnetics 48 1890
[13] Meessen K J, Paulides J J H 2011 IEEE Transactions on Magnetics 47 727
[14] Meessen K J, Gysen B L J 2010 IEEE Transactions on Magnetics 46 1733
[15] Miroslav Markovic, Yves Perriard 2009 IEEE Transactions on Magnetics 45 2955
[16] Xia Z P, Zhu Z Q, Howe D 2004 IEEE Transactions on Magnetics 40 1864
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[1] Atallah K, Howe D 1998 IEEE Transactions on Magnetics 34 2060
[2] Zhu Z Q, Howe D 2001 IEEE Transactions on Magnetics 12 1016
[3] Zhu Z Q, Xia Z P, Shi Y F 2003 IEEE Transactions on Magnetics 39 2992
[4] Xia C L, Li H F, Shi T N 2008 IEEE Transactions on Magnetics 44 2016
[5] Wang H, Ye Y, Wang Q, Dai Y, Yu Y, Weng P 2006 IEEE Transactions on Appl. Supercond. 16 1562
[6] Seok-Myeong Jang, Sung-Ho Lee 2002 IEEE Transactions on Magnetics. 38 3261
[7] Yan L, Zhang L, Wang T Y 2009 IEEE Transactions on Magnetics. 43 2036
[8] Suman Dwari, Leila Parsa 2011 IEEE Transactions on Magnetics. 58 3768
[9] Zhu Z Q, Xia Z P, Howe D 2002 IEEE Transactions on Magnetics. 38 2997
[10] Fan J J, Wu J H 2010 Proceeding of the CSEE 30 98 (in China) [范坚坚, 吴建华 2010 中国电机工程学报 30 98]
[11] Praveen R P, Ravichandran 2012 IEEE Transactions on Industrial Electronics 59 3553
[12] Shi T, Qiao Z Q, Xia C L 2012 IEEE Transactions on Magnetics 48 1890
[13] Meessen K J, Paulides J J H 2011 IEEE Transactions on Magnetics 47 727
[14] Meessen K J, Gysen B L J 2010 IEEE Transactions on Magnetics 46 1733
[15] Miroslav Markovic, Yves Perriard 2009 IEEE Transactions on Magnetics 45 2955
[16] Xia Z P, Zhu Z Q, Howe D 2004 IEEE Transactions on Magnetics 40 1864
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