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This paper proposes a novel hybrid excitation vernier permanent magnet machine (HE-VPM). The characteristics of the proposed machine are: 1) The PMs are embedded in the stator teeth, which is helpful for heat dissipation; 2) the rotor is salient structure without PMs and windings, which ensures the reliability of high speed running; 3) The non-overlapping concentrated winding shortens the end-winding,...
In this paper, a quick and efficient approach is proposed to estimate in vivo RF-induced heating from small medical implants under MRI procedure. An efficient methodology is developed to correlate the incident electric field to the induced temperature rise for stents of arbitrary shapes. A 10-cm-long titanium rod and a 6-cm-long intestine stent are used as examples to validate the approach under in...
In this paper, a quick and efficient approach is proposed to estimate the in-vivo RF induced heating of small medical implants under MRI procedure. The method is based on scaling the in-vivo incident electric fields. Numerical and experimental studies demonstrate the efficiency and accuracy of the proposed method.
Implantable stents can be used as radiation antennas for wireless communication of cardiovascular health monitoring data. However, such stent can also lead to RF induced heating during MRI procedure. In this paper, we investigate the effect of different stent size on the antenna radiation performance as well as its RF induced heating during MRI procedure. Preliminary investigations show that longer...
The distribution of charge trap in polyethylene was studied by means of photo-stimulated discharge (PSD) and thermally stimulated discharge (TSD). The shallow trap of 0.77eV in the analysis of TSD comes from the same trap distribution as the deep trap of the depth from 4.80 to 5.90eV in PSD. The results showed that the trap itself is suffered from thermal erosion in the process of charge released...
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