The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This This paper describes the development and testing of HK-01 Data Logger luxmeter. This luxmeter is able to operate automatically and record obtained data. This device is used to measure illuminance and it is characterized by a wide range, from 10mlx to 100klx. Its resolution is 1mlx. This device makes possible both manual and automatic range setting, as well as recording obtained values into the...
In recent years, the demand for testing of inductive load current switching duties has significantly increased. Parallel to this, a range of changes to the IEC standard 62271-110 have become effective. This contribution is intended to give an overview on some recent test experiences in inductive load switching with circuit breakers in a voltage range 12–550 kV, showing practical examples, changes...
The increased use of directed current (DC) as an enabler for the integration of renewable sources gains rising interest also for power transmission and distribution networks. Some preliminary installations showed some benefit of this technique compared with alternating current (AC) and pushed the development of switchgear for high (HV) and medium voltage (MV) DC grids. Several techniques able to provide...
This paper presents an experimental investigation of micro-contact performance (i.e. contact resistance) and reliability (i.e. successful cycles) evaluated under time-varying, low frequency, low amplitude, alternating current (AC) test conditions. Previous research efforts have focused on either on direct current (DC) or high frequency, radio frequency (RF) test conditions. This works attempts to...
Experimental setup for investigating the time-resolved ablation performance of polymers — functioning as wall materials for low voltage switching applications, was designed in this work. The test rig allows for chopping/bypassing a fault current up to the magnitude of 2.7 kA generated by a RLC damped circuit, in step of 1 millisecond. An updated test chamber allowing for characterizing the pressure...
ABB Medium Voltage (MV) drives offer flexible and reliable modular design for single as well as multi motor applications with power range from 3 to 36 MW. In order to validate the complex converter topologies and control methodologies of MV drives, a powerful multi core real time simulator is used for Hardware in Loop (HiL) testing. The Medium Voltage Drive Hardware-in-Loop (MVDHiL) system is preferred...
Built-in self-repair (BISR) approach utilized mostly in regular structures of memory cores has been a promising approach to increase the reliability of any type of integrated circuit. BISR considers spare blocks which in the case of a fault occurrence are used to replace defected circuit parts. A new fault detection and repair procedure with a generic BISR architecture for logic cores is presented...
Since VLSI technology has become ubiquitous in today's world, this field is a prime candidate for power reduction. Tremendous growth in chip density and reduction in dimensions contribute to an escalation in clock rate. Delay faults are detected using at-speed scan testing. This paper proposes a novel method to achieve power reduction during scan test by using x-filling. In this paper, ISCAS′89 benchmark...
Full scale aircraft structural testing is the only way before the maiden flight of aircraft. And it is essential to insurance of aircraft normal service. As part of the full scale aircraft structural testing, fatigue testing is the only effective method of judging the safety of aircraft service life. In the present situation, fatigue testing uses multiple valve controlled hydraulic cylinder driven...
Improvement in the reliability of grid-connected inverters is desirable with their increasing use. Inverter reliability tests usually focus on thermal testing of semiconductor devices. Regenerative methods are adopted to minimize the energy consumed during these tests. Regeneration requires additional systems — converters or passive components. In this paper, a novel method for thermal testing of...
The evolution of information technology and the explosive growth in Internet data have rendered traditional ways of providing information services and their infrastructure no longer appropriates. Data storage, computing and Internet services are moving toward virtualization and cloud computing. However, the performance of this network architecture needs to be examined to improve network bandwidth...
This study is directed towards highlighting tensions of incoming and outgoing vendors during outsourcing in a near-shore context. Incoming-and-outgoing of vendors generate a complex form of relationship in which the participating organizations cooperate and compete simultaneously. It is of great importance to develop knowledge about this kind of relationship typically in the current GSE-related multi-sourcing...
Debugging is challenging and labor-intensive. Debugging programs with weak or no oracle is even more difficult due to lack of passing and failing test runs as well as their comparisons. To address these challenges, we exploit metamorphic relations to construct new programs that are enhanced with synthesized oracle, and combine concolic testing and branch-switching debugging to localize potentially...
We report the results of destructive and nondestructive heavy ion single-event effects (SEE) testing of the Intersil ISL71840SEH hardened 16-channel analog multiplexer, prefaced by a brief discussion of its functionality, electrical specifications and fabrication process.
The measurement of time interval required in many research areas and applications, such as particular physics experiment, testing of integrated circuits (IC), instruments for space application, laser range measurement, biomedical applications and UV images etc. This measurement circuit requires wide range of gain, high accuracy and resolution. In this, a programmable time interval measurement circuit...
Parallel connected Active Front End (AFE) voltage converters are widely employed in high-power grid interfaces for renewable energy applications. With parallel connected two level power converters, the power rating of the system can be easily increased with higher stability and less control efforts than multilevel power converter based solutions. However, due to unmatched modules, unbalanced currents...
With the rapid advancements of deep submicron and nano technologies the dimension of a chip is ever shrinking. With continuous shrinking of chip dimensions, immense interconnects are associated on a die to satisfy high bandwidth requirements and make a network-on-chip (NoC) architecture prone to large number of interconnect faults. Therefore the reliability becomes a crucial issue for the communicating...
Dependability and fault tolerance will play an ever increasing role when using future technology nodes. The paper presents a fault-tolerance strategy for invasive networks on chip (i-NoC). The strategy focuses on permanent faults, resulting from either process fluctuations or aging effects and briefly outlines counter measurements against transient faults. We propose a scalable scheme for detection...
Eagle Harbor Technologies (EHT) is developing high voltage nanosecond pulsers capable of driving nonlinear transmission lines for high power microwave production and generating non-equilibrium plasmas. Other applications for high voltage nanosecond pulsers include plasma medicine, material science, enhanced combustion, drag reduction, surface and water decontamination and Electromagnetic device testing...
Eagle Harbor Technologies (EHT), Inc. is developing a high power full-bridge based on silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET). SiC MOSFETs offer many advantages over IGBTs including lower drive energy requirements, lower conduction and switching losses, and higher switching frequency capabilities. When comparing SiC and traditional silicon-based MOSFETs, SiC...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.