Abstract Failure of the transformer bushing will cause to be powered down or damaged, affecting safe operation power system. This paper proposes a method using system harmonics as dielectric response excitation source and studies insulation online detection technology based on transient characteristics. The technical scheme structure monitoring characteristics are given. A calculation model sho...

Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany 2012, our group presented the Hyperion IID platform which uses PDPC’s digitial SiPMs (DPC). In this work we use the same platform equipped with scintillator dimensions closer to a clinical application. This allows an investigation of the time of flight (ToF) ...

Abstract To overcome the rigid control of classical drive method which used fixed resistance to IGBT, a variable gate was proposed. This detected change rate collector current through parasitic inductor IGBT module, and closed-loop feedback this change. All expressions between voltage overshoot , overcurrent di/dt were derived. Based on these expressions, designed. The circuit selected resistan...

A complete module for single-photon counting and timing is demonstrated in a single chip. Features comparable with or better than commercially available macroscopic modules are obtained by integration of an active-quenching and active-reset circuit in complementary metal-oxide semiconductor technology together with a single-photon avalanche diode (SPAD). The integrated SPAD has a 12-microm-diam...

This paper aims determining the minimum decoupling capacitor Cdec for a railway traction inverter. It is defined when any increase of its value does not decrease overvoltage at turn off anymore. A simple generic model deduced from full understanding switching cell behavior, including effect all stray inductances and interactions within cell. used in an optimization process order to obtain direc...

1. Introduction Life-cycle cost reduction of transmission and distribution systems is becoming increasingly important to adapt to global changes resulting from factors such as electricity market liberalization, electricity industry deregulation , environmental protection issues, as well as various emerging technologies developed using information technology advances. Technical requirements for ...

In SiC-based adjustable speed drives, the high voltage slew rate ( $dv\!/\!dt$ ) of switching transitions results in excessive overvoltage at motor terminals due to reflected voltages across drive power cables. Besides cable length, ris...