A linear-rotary motion permanent magnet (PM) generator is investigated with six axial modular E-shaped stator sections arranged circumferentially, which can meet the requirement of wave and tidal energies generation. The PM pole is magnetized in radial direction, and the adjacent PM poles with opposite magnetized directions are interlaced by half mover pole pitch both in circumferential and axial directions, which are located on the mover surface. The rotational and rectilinear motions are achieved by one magnetic circuit structure according to the transverse flux principle and electromagnetic induction principle. The optimization design and electromagnetic properties of the proposed motor are calculated by 3-D finite element simulation. Then the optimal structural parameters are obtained. The back electromotive force (back EMF) and harmonics, the amplitudes of the cogging torque and detent force are decreased than those of the initial topology. Since three phases of the nine phase windings generate same initial phase angle of back EMF whether it works in rotational or rectilinear motion, the traditional three phase energy storage system can be used to realize the energy storage of the nine phase windings, which reduces the difficulty of electrical energy storage. The variation of the amplitude of back EMF is hardly affected with different mover positions, which is conducive to improve the efficiency of marine energy power generation.

中文翻译：

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E型定子直线旋转永磁发电机的设计优化


研究了一种直线旋转运动永磁（PM）发电机，其具有六个轴向模块化E形定子部分，周向布置，可以满足波浪能和潮汐能发电的要求。 PM磁极沿径向磁化，磁化方向相反的相邻PM磁极在周向和轴向上以半动子磁极距交错，位于动子表面。根据横向磁通原理和电磁感应原理，通过一种磁路结构实现旋转和直线运动。通过 3-D 有限元仿真计算了所提出电机的优化设计和电磁特性。然后得到最优的结构参数。反电动势（back EMF）和谐波、齿槽转矩和制动力的幅值比初始拓扑有所减小。由于九相绕组中的三相无论工作在旋转还是直线运动，都会产生相同的反电动势初始相角，因此可以采用传统的三相储能系统来实现九相绕组的储能，降低了难度。的电能存储。动子位置不同，反电势幅值变化几乎不受影响，有利于提高海洋能发电效率。