通过改进采样方法，优化永磁电机的换相角以提升扭矩密度。
A Novel Multi-Criteria Local Latin Hypercube Refinement System for Commutation Angle Improvement in IPMSMs
- 提出多准则局部拉丁超立方采样法，提升参数优化效率。
- 在保持电流水平下，使磁体质量减少，扭矩密度提升。
- 适用于对电机效率和轻量化有要求的电动汽车领域。
换相角定义为电机相电流基波与反电动势基波之间的夹角，可用于改善IPMSM性能。由于阻力转矩依赖于换相角，即使在扩展速度范围前也可产生补偿效果。本文展示了一种实时最大转矩每安培和电压策略，用于确定最优换相角γ的轨迹，其精度取决于应用需求和计算能力。提出一种新型多准则局部拉丁超立方精化（MLHR）采样系统，以减少磁体体积并优化设计过程。该方法在维持相近相电流水平的前提下，降低了磁体质量，提升了电机扭矩密度。以第三代丰田普锐斯IPMSM为参考电机，通过调整转子结构实现独立评估。
原文摘要 · Abstract (English)
The commutation angle is defined as the angle between the fundamental of the motor phase current and the fundamental of the back-EMF. It can be utilised to provide a compensating effect in IPMSMs. This is due to the reluctance torque component being dependent on the commutation angle of the phase current even before entering the extended speed range. A real-time maximum torque per current and voltage strategy is demonstrated to find the trajectory and optimum commutation angles, gamma, where the level of accuracy depends on the application and available computational speed. A magnet volume reduction using a novel multi-criteria local Latin hypercube refinement (MLHR) sampling system is also presented to improve the optimisation process. The proposed new technique minimises the magnet mass to motor torque density whilst maintaining a similar phase current level. A mapping of gamma allows the determination of the optimum angles, as shown in this paper. The 3rd generation Toyota Prius IPMSM is considered as the reference motor, where the rotor configuration is altered to allow for an individual assessment.
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