Shen Jiazhou, Busi Matteo, Rauscher Peter, Valsecchi Jacopo, Nemeth Gergely, Strobl Markus
PSI Center for Neutron and Muon Sciences, Villigen PSI, 5232, Switzerland.
Fraunhofer Institute for Material and Beam Technology IWS, Winterbergerstrasse 28, 01277, Dresden, Germany.
Sci Rep. 2025 May 26;15(1):18438. doi: 10.1038/s41598-025-02806-1.
Well-designed guidance of the magnetic field through electric steel sheets forming the rotor of electrical motors and generators is of utmost importance with regards to efficiency. Typically, this is achieved through tailored cutouts in the sheets. While fulfilling the magnetic guidance needs this strategy structurally weakens the rotor and ultimately limits the possible rotation speeds due to the mechanical forces these imply. Recently an alternative approach has been reported, in which the material is embossed in respective regions. The, thus, induced stresses act, based on the inverse magnetostrictive effect, as flux barriers without, unlike traditional cutouts, weakening the structure significantly. Here we propose to replace the embossing through laser shock peening, which can be controlled digitally and hence be applied flexibly, without the need for mechanical changes in the production lines, like in the case of a punch.
对于电机和发电机的转子而言，通过构成其转子的电工钢片进行精心设计的磁场引导对于效率至关重要。通常，这是通过在钢片上定制切口来实现的。虽然这种策略满足了磁引导需求，但在结构上削弱了转子，并且由于其所带来的机械力，最终限制了可能的转速。最近报道了一种替代方法，即在相应区域对材料进行压花处理。基于逆磁致伸缩效应，由此产生的应力充当磁通屏障，与传统切口不同的是，它不会显著削弱结构。在此，我们提议通过激光冲击喷丸来替代压花处理，激光冲击喷丸可以进行数字控制，因此可以灵活应用，无需像冲压那样在生产线上进行机械更改。
