High-performance synchronous reluctance motors by local manipulation of the magnetic properties of electrical steel laminations during the laser cutting process

通过在激光切割过程中局部控制电工钢叠片的磁性来实现高性能同步磁阻电机

• 批准号: 245194688
• 负责人: Professor Dr.-Ing. Eckhard Beyer
• 金额: --
• 依托单位: Professur für Elektrische Maschinen und Antriebe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/245194688?language=en
• 关键词: performance; synchronous; reluctance; motors; local

The synchronous reluctance machine is considered as a viable alternative to typically used permanent magnet synchronous machines and induction machines. Especially the tremendous rising of rare-earth magnet prices (e.g. NdFeB) and the resulting higher costs of PM-machines led to an increased interest in this magnet-free and therefore cost-efficient motor type. However, a broader application of synchronous reluctance motors is currently still prevented by the comparatively low power factors and power densities. The highly limited saliency ratio (or synchronous inductance ratio) between the d-axis and q-axis flux can be considered as the main reason. Theoretical analyses have shown that higher saliency ratios can be achieved by reducing the width of the leakage flux guiding steel bridges. However, that leads to a decreased mechanical stability of the rotor. The planned project analyses this problem in detail and aims for a significant higher saliency ratio by local manipulation of the electrical steel lamination properties during the laser cutting process. Contouring the sheet metal by laser cutting is characterized by a high number of degrees of freedom (cutting parameter set) compared to mechanical cutting processes (e.g. punching). This opens up the opportunity for an optimal local setting of magnetic characteristics dependent on the area of the electric machine. Furthermore, using the laser allows the manufacturing of highly filigree structures that cannot be achieved with mechanical methods. The project deals with detailed analysis of the potentials by using the laser for the cutting process of the electrical steel laminations for application in synchronous reluctance motors. The resulting impact on the operational behaviour of the machine is studied in theory and experiment. The analyses can be transferred to other motor types (e.g. PM-motor) as well, even though a lower influence on the machine behaviour is expected.The main objective of the project is a considerable increase of the saliency ratio (+ 25 %) in comparison to current synchronous reluctance motors without decreasing the mechanical stability of the rotor. This leads directly to higher power densities and power factors and therefore higher efficiencies as well. An important contribution to a more widely application of synchronous reluctance machines is expected.

同步的不情愿机被认为是通常使用永久磁铁同步机和感应机的可行替代方法。尤其是稀土磁铁价格的巨大上涨（例如NDFEB）以及PM-Machines的更高成本导致对这种无磁铁和成本效益的运动类型的兴趣增加。但是，目前，相对较低的功率因子和功率密度相对较低，目前仍阻止了更广泛的同步不情愿电动机的应用。 D轴和Q轴通量之间的高度有限的显着性比（或同步电感比）被视为主要原因。理论分析表明，通过减少泄漏通量引导钢桥的宽度可以实现更高的显着性比。但是，这导致转子的机械稳定性降低。计划的项目详细分析了此问题，并旨在通过在激光切割过程中对电气层压板的局部操纵来提高显着性比。与机械切割过程（例如打孔）相比，通过激光切割对钣金的轮廓为高度的自由度（切割参数集）。这为取决于电动机区域的最佳本地磁性特性开辟了机会。此外，使用激光允许制造高度花边结构，这些结构无法使用机械方法来实现。该项目通过使用激光来对电势进行详细分析，用于将电钢层压的切割过程用于同步不情愿的电动机。在理论和实验中研究了对机器运营行为的产生影响。即使预期对机器行为的影响较低，也可以将分析转移到其他运动类型（例如PM运动）中。与当前同步不感动电机相比，该项目的主要目的是显着率的显着率（+ 25％）的大幅度提高，而无需降低转子机械稳定性。这直接导致更高的功率密度和功率因素，因此也提高了较高的效率。预计对同步不情愿机器的更广泛应用的重要贡献。