General analytical optimization model has been proposed for brushless surface-inset permanent magnet (PM) machines having even-/odd-segment Halbach array. The air-gap magnetic fields have been analytically obtained by solving the matrix equations of subdomain model. For the maximum air-gap magnetic field, electromotive force (EMF), and electromagnetic torque of the even-/odd-segment Halbach, the optimal pole-arc ratio of each magnet segment, and/or the optimal magnetization angle of each side-magnet have been analytically determined. Taking 16-pole/21-slot surface-inset machines with three-/four-segment Halbach magnet array as examples, the predicted results show that the globally optimized electromagnetic torques of Halbach surface-inset machine are significantly enhanced. Analytically predicted results have been validated by a finite-element (FE) technique.

中文翻译：

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偶/奇数段 Halbach 表面嵌入电机的通用分析优化模型


已经为具有偶数/奇数段 Halbach 阵列的无刷表面插入永磁 (PM) 电机提出了通用分析优化模型。通过求解子域模型的矩阵方程，解析地得到了气隙磁场。对于偶数/奇数段 Halbach 的最大气隙磁场、电动势（EMF）和电磁扭矩，每个磁体段的最佳极弧比，和/或每个边的最佳磁化角度 -磁体已被分析确定。以三段/四段Halbach磁体阵列的16极/21槽曲面嵌入电机为例，预测结果表明，Halbach曲面嵌入电机全局优化的电磁扭矩显着增强。分析预测结果已通过有限元 (FE) 技术得到验证。