This paper proposes a novel health-sensitive parameter, called the gate-emitter pre-threshold voltage VGE(pre-th), for detecting IGBT chip failures in multichip power modules. The proposed method has been applied an gate driver and measures VGE at fixed time instant of transient before threshold occurs. To validate method, theoretical analysis practical results 16-chip module are presented paper. show 500 mV average shift measured VGE(pre-th) each failure.

Temperature sensitive electrical parameters (TSEPs) are promising for measurement of the insulated gate bipolar transistor (IGBT) junction temperature. Many TSEPs have been proposed in literature and most require current sensors, convoluted hardware data processing, which associated with increased complexity cost. In this letter, a new TSEP is called prethreshold TSEP, V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">GE(pre-th)</sub> . requires...

Multichip insulated gate bipolar transistor (mIGBT) power modules (PMs) degrade over cycling. Bond wire lift-off is one of the major failure modes. This article presents a technique to diagnose bond by analyzing on-state voltages across collector and emitter terminals Kelvin terminals. The proposed method can indicate first out 37 wires in mIGBT. main novelty that it locate chip has lift-off(s). In addition, temperature dependence approach negligible. describes detail shows results...

Fluorescent magnetic particle inspection (MPI) is a conventional non-destructive testing process for railway bearing rings that still needs to be completed manually. Due the complexity of ring surfaces in inspection, automatic detection based on image processing difficult apply. Therefore, we proposed defect identification method visual characteristics and high-level features. Inspired by mechanism human perception, defects can identified from complex background conveniently eyes. According...

A synthetic method that relies on Au(I)-catalyzed tandem 1,3-acyloxy migration/double cyclopropanation of 1-ene-4,9-diyne and 1-ene-4,10-diyne esters to construct the respective architecturally challenging tetracyclodecene tetracycloundecene derivatives is described. Achieved under mild reaction conditions, transformation was shown be robust with a wide variety substitution patterns tolerated give two members carbocyclic family in good excellent yields as single regio- diastereomer.

Temperature sensitive electrical parameters (TSEPs) are used to determine the chip temperature of a single-chip insulated gate bipolar transistors (IGBT) power module by measuring one device parameter. Commonly, most TSEPs have linear relationship between and Like any sensor, preferred attributes include good accuracy, linearity, sensitivity. For multichip IGBTs (mIGBTs) modules, these can only be achieved when all chips same temperature. Equal temperatures among different semiconductor...

Nanosized particles of strontium bismuth vanadate SrBi 3 VO 8 were prepared via the Pechini method on base citrate‐complexation route. The samples characterized using X‐ray powder diffraction ( XRD ), scanning electron microscope SEM energy dispersive spectra EDX photoelectron spectroscopic XPS and UV –vis absorption spectrum. This bismuth‐containing presents an efficient in –visible light wavelength region with a narrow band‐gap 2.36 eV indirect allowed electronic transition. It is...

Polycrystalline Ce3+-doped K3YB6O12 (1–14 mol%) phosphors were prepared by facile chemical sol–gel synthesis. The phase formation of the was confirmed x-ray powder diffraction (XRD) analysis. photoluminescence excitation spectra (PLE), emission (PL) and luminescence decay curves tested. Under near-UV light, present from blue color to yellowish green due allowed 4f –5d transitions Ce3+ ions. absolute quantum efficiency (QE) K3YB6O12:Ce3+ can reach 53% under light. thermal quenching phosphor...

Abstract A method to prepare synthetically important 3,5‐disubstituted phenol derivatives that relies on the sequential gold(I)‐catalyzed dehydrogenative cycloisomerization of 1,4‐enyne esters in presence 2,3‐dichloro‐5,6‐dicyanobenzoquinone (DDQ) or N ‐fluorobenzenesulfonimide (NFSI) is described. The synthetic versatility methodology was exemplified by a gram‐scale reaction one example, ease realize subsequent functional transformations an adduct, and application synthesis bioactive...

The heat transfer of power devices has the characteristics multitimescale. However, traditional thermal network model is difficult to predict temperature information at multitimescale accurately. This article proposes a for devices, with metal-oxide-semiconductor field-effect-transistor ( <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> ) as an example. First, we establish finite-element calculation and then reduce order based on...

This paper proposed a novel parallel passive damping topology for LCL-filter, which consists of resistors paralleled with grid side inductor and inductors connected in series filter capacitance. The could improve the harmonic attenuation lower losses. Damping losses suppressions different filtering topologies were presented it was found that more effective than traditional LCL-filter or LLCL-filter. A design procedure also shown this paper. Finally, MATLAB model built to verify design.

This paper proposes a novel switched-capacitor balancing topology with an auxiliary inductor to reduce the total energy loss and improve efficiency. More specifically, circuit couples switched capacitor together form resonant switch unit. The simulation model of is established analyzed. Experiments also are performed verify that topology. Results showed for could raise

Electrochemical Impedance Spectroscopy (EIS) has been widely applied for Li-ion battery research because EIS can reflect the physical characteristics. The full impedance spectrum sweep generally takes several minutes. Thus, it is impossible to implement a real-time investigations. In this paper, machine learning approach proposed address issue. based on multi-sine signal technique, where impedances at corresponding frequencies are derived with fast Fourier transform. obtained via approach....

Silicon carbide devices have become increasingly popular in electric vehicles, predominantly due to their fast-switching speeds, which allow for the construction of smaller power converters. Temperature sensitive electrical parameters (TSEPs) can be used determine junction temperature, just like silicon-based switches. This paper presents a new technique estimate temperature single-chip silicon (SiC) metal–oxide–semiconductor field-effect transistor (MOSFET). During off-state operation,...