Multiphase dc-excited Vernier reluctance machine (DC-VRM) exhibits the merits of robust structure, small torque ripple, and good fault-tolerant ability. Developing advanced sensorless drive methods can further promote its application in safety-critical system. In this article, pulse injection are optimized a six-phase DC-VRM parallel H-bridge system to strengthen their acceleration performance ...

This paper proposes a V-shaped permanent magnet vernier (V-PMV) motor for potential applications in direct drive system. By designing suitable pole slot ratio and adopting the PM topology dummy slots rotor, flux leakage can be avoided effectively. Meanwhile, high-order harmonics with large amplitude airgap magnetic field are fully utilized served as effective working harmonics, which aim at enh...

A novel dual permanent magnet (PM) machine with Halbach segmentation flux modulation is proposed in this paper, which evolved from a switching PM (FSPM). In order to improve the performance of FSPM, several arrangement methods have been adopted and three new different structures investigated. To achieve fair comparison, all are under same size rotate at speed. The performances output torque bac...

The ability to see fine detail diminishes when the target of interest moves at a speed greater than a few deg/s. The purpose of this study was to identify fundamental limitations on spatial acuity that result from image motion. Discrimination of Vernier offset was measured for a pair of vertical abutting lines and letter resolution was measured using a four-orientation letter 'T'. These stimuli...

Amblyopia is usually defined as a deficit in optotype (Snellen) acuity with no detectable organic cause. We asked whether this visual abnormality is completely characterized by the deficit in optotype acuity, or whether it has distinct forms that are determined by the conditions associated with the acuity loss, such as strabismus or anisometropia. To decide this issue, we measured optotype acui...