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Nowadays, a clear trend of increase of system voltage to 800 kV AC and above can be observed in the world. This calls for the need of having test facilities to verify the fault current interruption performance of circuit breakers for such “super grids”. Standard synthetic test-methods for fault current interruption verification cannot be applied to circuit breakers of 800 kV and above, and alternative...
The paper presents the methodology and design of testing structure dedicated to one laboratory model of a filtering and regeneration system (SISFREG) developed through the project number 42/2014, type Partnerships — PCCA 2013, which allows the conversion of the dc traction substations in "active substations". The configuration was made based on the actual conditions prevailing in a substation...
This paper presents a calibration technique based on missing-code-detection (MCD) scheme to correct the gain error between the MSB and the LSB array in SAR ADCs with bridge-DAC structure. The MCD algorithm replaces the gain factor calculation with simple missing-codes count that significantly reduces the calibration digital overhead. It also relieves the linearity requirement of the testing signal;...
Energy storage is anticipated to play an important role on future surface combatants as specialized weapons and sensors systems are introduced, which may require high power and fast ramp rates over short periods of time. The energy magazine (EM) concept has been proposed as one approach for incorporating these types of systems into future, as well as existing, platforms. The EM is envisioned as a...
DC capacitors in power electronic converters are a major constraint on improvement of power density as well as reliability. In this paper, according to the degradation data of electrolytic capacitors through the accelerated test, the time-to-failure of the capacitor cell is acquired and it can be further extended to lower stress levels. Then, in a case study of a fuel cell backup power application,...
We live in a world of Energy. We use it and, following the laws of Thermodynamics, give up a portion of that as inevitable toll for its conversion for our purposes. There are the non-conventional sources around us. Utilization of these energies will help to reduce harmful pollution caused by the oil and coal technologies and save money for the social developments. Beside the previously considered...
This paper presents the demonstration of integrated passive devices on a 300mm mold-first FOWLP technology platform with 3 metal layers (Cu RDL) build-up. In this case, a low-temperature cure, negative-tone polyimide (PI) material is selected as the inter-layer dielectric. MIM capacitors were fabricated on top of M1 RDL layer with low temperature CVD deposited inorganic as the dielectric and typical...
Integrating Analog to Digital Converters (lADCs) are known for high resolution and continuous transfer characteristics. Nonlinearity of the transfer characteristics is influenced by dielectric absorption of the integrating capacitor, which is the only external element. The nonlinearity can be compensated if dielectric absorption elements are known. This article deals with such compensation by means...
❑ Context: DC railway vehicles are subjected to surge transients specific to the traction system environment. ❑ Transient Event Specifications: • Standards. • Transit authorities may specify their own requirements. • Each project requires custom design. ❑ Vehicle Manufacturers Main Task: • Demonstrate during the qualification testing phase the performance of both the equipment and the overall system...
The multilevel flying capacitor topology is a promising technology for future electric aircraft, where high specific power density power converters are required. Hardware-in-the loop co-design can improve design throughput as more complex implementations of this technology are developed. This paper presents a comparison of hardware-in-the-loop emulation and hardware prototype results for 3-, 5- and...
Modern DRAM-based systems suffer from significant energy and latency penalties due to conservative DRAM refresh standards. Volatile DRAM cells can retain information across a wide distribution of times ranging from milliseconds to many minutes, but each cell is currently refreshed every 64ms to account for the extreme tail end of the retention time distribution, leading to a high refresh overhead...
DC capacitors in power electronic converters are a major constraint on improvement of the power density and the reliability. In this paper, according to the degradation data of tested capacitors, the lifetime model of the component is analyzed at various confidence levels. Then, the mission profile based lifetime expectancy of the individual capacitor and the capacitor bank is estimated in a fuel...
Shunt capacitor bank switching was a frequent and challenging operation duty for vacuum circuit breakers (VCBs). The designing and selection of contacts should be taken into as it is a core component which can directly impact arcing behavior in vacuum interrupters (VIs). The objective of this paper is to investigate the capacitive current switching performance of three different contacts, including...
Since passing its commissioning tests in early August 2011, the flexible pulsed dc current source (FPDCS) at ETH's high voltage laboratory has enabled research in different areas of HVDC switchgear as well as its applications with an unprecedented variability and flexibility, establishing many new research opportunities. Over the course of five years of continuous use, a significant number of incremental...
In an era when vehicle weight is very important to mission success, non-traditional technology must be developed to provide protection without adding parasitic weight to a vehicle, such as added by heavy armor packages. Electromagnetic Armor (EMA) is one possible technology that may lead to the realization of achieving lighter weight with equal or greater protection levels. We conducted a 1,000 mile...
System-level detection and mitigation of DRAM failures offer a variety of system enhancements, such as better reliability, scalability, energy, and performance. Unfortunately, system-level detection is challenging for DRAM failures that depend on the data content of neighboring cells (data-dependent failures). DRAM vendors internally scramble/remap the system-level address space. Therefore, testing...
Currently, in the assembly process of the electronic device occupies much trouble by CDM.CDM test is done after the package assembly. Therefore, if it failed by CDM test, it would be to spend a lot of time and cost from design changes to assembly. In recently, HBM test is possible to measure on the Wafer, it is possible to design changes before the assembly of the package. However, CDM test cannot...
Recent advances for the treatment of a cerebral aneurysm include a neurovascular flow diverter which can cover the entire length of the aneurysm inside the vessel. The flow diverter reduces blood flow that enters the aneurysmal sac without any adverse effects on the normal directional flow in the vessel. However, existing neurovascular flow diverters show a lengthy curing rate of the sac, which requires...
Modular multilevel converters (MMCs) for high power applications may contain over a thousand submodules. In situations such as submodule design or innovation, to build a full system with as many levels to test the submodule is time consuming and costly. To solve the problem, testing schemes have been developed to allow individual submodules to be tested without a complete MMC system. This paper presents...
The characteristics of one-shot switch for the exploding foil initiators system (EFIS) are researched. The switch is fabricated based on micro-fabrication. The palsma temperature of the switching process is analyzed by using the method of the atomic emission spectroscopy double line technique. The shock pressure of Schottky Barrier Diode (SBD) electro-explosive is tested by Polyvinylidene Fluoride...
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