Permanent magnet variable flux sources are produced by rotating two nested N-segment, permanent magnet, Halbach cylinders. Torque is primarily an end effect, determined by field nonuniformities due to the finite length and segmented structure of the cylinders. Due to symmetry, one cylinder experiences zero torque in a uniform applied field. Experiment and numerical simulation reveal that the torque is composed of a dominant term of frequency 1/(2/spl pi/) and harmonics at (kN/spl plusmn/1)/(2/spl pi/), where k is an integer.
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机译:永磁可变通量源是通过旋转两个嵌套的N段,永磁体,Halbach圆柱体产生的。扭矩主要是一种末端效应,由圆柱体的有限长度和分段结构所引起的磁场不均匀性决定。由于对称性,一个汽缸在均匀的施加场中会经历零扭矩。实验和数值模拟表明,转矩由频率1 /(2 / spl pi /)的主导项和(kN / spl plusmn / 1)/(2 / spl pi /)处的谐波组成,其中k是整数。
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