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This project develops a nanocomposite insulating material with high insulation performance obtained by homogeneous dispersion of nano-fillers to epoxy resin. This project aims to apply solid insulating technology with nanocomposite material to electric power apparatuses for power distribution such as switchgears.
We present a new global shutter CMOS imager with 2 transistors per pixel. The first transistor is a ring gate transistor for accumulating holes that modulate threshold voltage. The second one is a transfer gate transistor that transfers holes from a PD to the ring gate transistor at the same time in all pixels. Simple structure allows us to realize 5.4 um pixel pitch, kTC noise free, and global shutter...
Interfaces are considered to play a predominant role in polymer nanocomposites. Many studies have been made in terms of macroscopic characteristic parameters such as permittivity, breakdown voltage and partial discharge resistance. However, few studies have been made to clarify the mesoscopic structures of interfaces between inorganic nano-fillers and surrounding polymer matrices. We conducted a coarse-grained...
Epoxy resin containing nano-scale silica particles was prepared to evaluate partial discharge degradation and insulation breakdown strength. This material showed superior partial discharge resistance and breakdown strength to epoxy resin without silica particles. Moreover, the focus was on dimension of silica particles and a silane coupling agent to investigate the influence of epoxy/silica interface...
Accompanied with the prevalence of motors controlled by the inverter, the problem of surge voltage arising from the inverter has become intensified. The high frequency components of the inverter switching pulse voltage lead to the overvoltages due to the impedance of the cable between the inverter and the motor, and the insulating materials have been damaged by the partial discharges. In this study,...
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