Active Magnetic Bearing for Integrated Turbo-machines

主动磁轴承（AMB）提供低损耗、高可靠性的轴承，适用于极高的转速。电磁轴承涉及非常快速的反馈控制、系统动态的精确数值建模、高带宽电力电子和良好的磁路设计的组合，因此单套的开发成本非常高。目前，AMB既可以用于中等价值的产品（如半导体/物理实验室的高真空泵或高速空气压缩机组），其中合理的体积可以收回数千个单位的开发成本，也可以用于大型高价值机器，其中缺乏替代品可以证明极高的成本（如管道压缩机，潜艇上的蒸汽涡轮机）。对于OEM来说，单个大型轴承组的成本为25万英镑并不罕见。现在存在一个独特的商业机会，因为对于特定类别的客户-具有开发和制造电磁机器的内在能力的客户，按照给定设计再生产多个轴承的总成本相对较低。这些客户缺少的元素是控制器的实现和电磁设计能力。JPE系统公司打算通过应用复杂的转子动力学模型、新颖的电磁线圈绕组和开发低成本、高容量的控制器硬件和电力电子技术来提供这种“专有技术”。经过验证的JPE系统“工具包“将使OEMS能够在内部集成AMB，并大幅降低产品成本，如中速（

Active Magnetic Bearings (AMBs) provide low-loss high reliability bearings suited toextremely high rotational speeds. AMBs involve a combination of very fast feedback control,accurate numerical modelling of system dynamics, high-bandwidth power electronics & goodmagnetic circuit design, consequently the development costs of single sets have remainedextremely high. AMBs are presently found either in medium-value product sets (eg highvacuum pumps for semicon/physics labs or high speed air compression sets) where reasonablevolumes pay back development costs over many thousands of units or in large high-valuemachinery where the lack of alternatives justifies extremely high costs (eg pipelinecompressors, steam-turbines in submarines). It is not unusual for individual large bearing setsto cost £250K to the OEM.A unique business opportunity now exists due to the total cost of reproducing multiplebearings to a given design can be comparatively low to a particular class of customers – thosewith intrinsic capability to develop & manufacture electromagnetic machines. The missingelement for these customers is the controller implementation & electromagnetic designcapability. JPE Systems intends to provide this “know-how” through the application ofsophisticated rotordynamic modelling, novel magnet coil windings and the exploitation of lowcosthigh-volume controller hardware & power-electronics. The proven JPE Systems “toolkit”will enable OEMS to integrate in-house and at significantly reduced cost AMBs inproducts such as medium-speed (