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We present here a study of in-wafer uniformity of in-situ boron concentration in SiGe:C epitaxial layers by SEG. One of the robust designs, the Taguchi method, is used to optimize both uniformity of boron concentration and that of SiGe:C layer thickness with blanket wafers at the same time
In electric motor coaches, when the adhesion force coefficient between rail and driving wheel decreases suddenly, the electric motor coach experiences slip phenomena. We (1999) have already proposed the anti-slip control system based on ordinary zero order disturbance observer, which has a good anti-slip response. In order to realize the more stable anti-slip re-adhesion control in the case of large...
This paper reports the basic concept and recent industrial applications of a sensorless vector-controlled speed-control system for an inverter-fed induction motor in Japan. The vector control artificially gives the linear torque controllability, which is inherent for a separately excited DC motor, to the induction motor drive. First, in this paper, the fundamental concept of vector control is introduced...
Insulation of crosslinked polyethylene (ILPE) insulated power cables may be occasionally exposed to nigh temperature above 150°C for relatively short period in the course of cable jointing procedure. The authors have reported that the cumyl alcohol produced as a decomposition product from crosslinking agent (dicumyl peroxide, DCP) might be dehydrated to leave water in the XLPE insulation during the...
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