Reduction in Size and Power Consumption of a Bearingless Motor and its Application to a Next-Generation Clean Device

本研究的目的是降低无轴承马达的尺寸和功率消耗，并将其应用于下一代清洁装置。提出了一种两自由度主动定位无轴承电机应用于紧凑型离心泵。可用的水头为1.5 m，流速为4 L/min。采用软磁复合材料制成的定子铁心，使铁心损耗降低了85%.提出了一种新型的单自由度主动定位无轴承电机，该电机采用一套三相绕组和一个三相逆变器，称为单驱动无轴承电机，并进行了制造和试验，证明了其可行性。此外，提出了利用零相电流对执行器进行主动调节。所提出的方法有可能进一步缩小尺寸和节能的无轴承电机系统。

The research objective is to reduce the size and power consumption of a bearingless motor and its application to a next-generation clean device. A proposed two-dof actively positioned bearingless motor was applied to a compact centrifugal pump. A water head of 1.5 m and a flow rate of 4 L/min were available. Core loss was reduced by 85 % with stator cores made of soft magnetic composites. A novel one-dof actively positioned bearingless motor, which employs one set of three-phase winding and thus one three-phase inverter, dubbed a single-drive bearingless motor, was proposed, fabricated, and tested, and its feasibility was demonstrated. In addition, utilization of a zero-phase current for an active regulation of an actuator was proposed. The proposed method has a possibility of further downsizing and energy saving of a bearingless motor system.