Ironless axial flux permanent magnet synchronous machine with a ceramic winding carrier for flywheel applications

由于传动轴较短，飞轮储能系统体积能量的增加促使轴向磁通机先于径向磁通机。为了消除空载运行期间的铁损，陶瓷板承载机器绕组，同时为绕组的冷却提供良好的导热性能。正在进行的研究项目的继续旨在验证一种适用于高达40 000rpm的飞轮应用的无铁轴向磁通永磁同步电机。这需要一台由定子和转子以及逆变器组成的机器来运行。目前，只能对陶瓷绕组载体的隔离进行分析，忽略了诸多影响。作者认为，电感小、损耗小的轴向磁通机要想成功运行，就需要一个模块化的多电平逆变器。因此，通过驱动系统的实现，扩展了项目计划。

An increase of the volumic energy of flywheel energy storage systems promotes axial-flux machines before radial flux machines due to the shorter drive shaft. For the elimination of iron losses during no-load operation, a ceramic plate carries the machine winding whilst providing a good thermal conductivity for the cooling of the winding. The continuation of the ongoing research project aims to validate an ironless axial-flux PM synchronous machine for flywheel applications of up to 40 000 rpm. This requires a machine consisting of stator and rotor as well as an inverter for its operation. Currently, only the isolates ceramic winding carrier could be analyzed, neglecting numerous effects. From the author’s perspective, a successful operation of the axial-flux machine with a very small inductance and low losses demands a modular multi-level inverter. The project plan is therefore extended by the realization of the drive system.