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In this paper a high step-up interleaved boost converter is proposed for renewable energy applications. The proposed converter uses multi-phase/interleaving technique with two coupled inductors in one phase and an intermediate capacitor between the two phases. The idea is such that the coupled inductors are used to develop a high voltage across the intermediate capacitor and then this high voltage...
A novel single-phase soft-switching AC/AC converter using a simple auxiliary resonant unit and a small AC capacitor is proposed. All main switching devices operate at zero-voltage-switching (ZVS) turn-on, while the auxiliary switches operate at zero-current-switching (ZCS) turn-off. The advantages of this topology are found in efficiency improvement, reduced the voltage stresses, and greatly reduced...
Though Silicon Vias(TSVs) are regarded as a key technology to achieve three dimensional(3D) integrated circuit(IC) functionality. Annealing a silicon device with TSVs may cause high stress and cause TSV protrusion because of high Coefficient of Thermal Expansion(CTE) between silicon substrate and TSVs. The TSV wafers could be annealed right after copper plating process, or after chemical mechanical...
The development of 3D-silicon integrated circuits is an increasing demand especially regarding to advanced 3D-packages and high performance applications, with the intend to miniaturize and to reduce costs. Through-silicon-vias (TSV), interconnects and landing pads have a strong mismatch in proportions. Due to high temperature as well as high applied currents, the reliability of the systems and components...
Silicon carbide (SiC) is an inorganic material which has non-linear conductivity characteristics. When mixed nano-size SiC into silicone rubber (SIR), the composites can achieve non-linear conductivity characteristics also. In this paper, the non-linear conductivity properties of 5wt%, 15wt%, 30wt%, 45wt% nano-SiC/SIR composites are investigated. The relationship between conductivity and electric...
TCAD plays an increasingly critical role in advanced technology research and development. The areas of impact expanded to not only predicting device outcome from process input, but also to topics traditionally not addressed by TCAD.
Due to the rapidly growing MEMS initiator market and the needs for smaller, safer and higher integration, more advanced switches are in demand. The novel solid MEMS switch can improve the security and reliability of MEMS initiator, while the leads of its package are weak under high impact. This paper mainly studied the leads reliability of the novel solid MEMS switch under high impact by FEM simulation...
A micromachined cantilever-based flow sensor is designed, depending on the detection of surface strain on the cantilever caused by the mass flow. In the continuous flow mode, the deflection of cantilever is directly proportional to the flow rate. The working mechanism of the strain beam in the flow sensor is analyzed, and the finite element method(FEM) is used to investigate the structural deformation...
This paper reports a micrometer level pressure sensor to measure the intracranial pressure (ICP). The sensor is based on the piezoresistive effect. The piezoresistive pressure sensor is simulated and designed by using nonlinear programming Optimizing and Finite Element Analysis (FEA) tools. The sensor is fabricated by MEMS process. From tests, the sensor samples performances match up the design.
In order to investigate flow characteristics in upper airway, this study focuses on applied Computational Fluid Dynamics (CFD) with Obstructive Sleep Apnea Syndrome (OSAS) base on Computed Tomography images. OSAS has been remarked in the several decades because of its disturbance and severity that leading to a serious morbidity and excess mortality in long-term consequences such as heart attack and...
In this paper, we make an in-depth investigation on the issue of distributing link stress. It is a fundamental problem in popular Internet TV systems because the service quality at the receiving side is determined by network congestion and bandwidth usage of the links. Less congestion level and balanced bandwidth usage enable IPTV systems to accommodate more subscribers and service channels, which...
The stress distributions in strained Ge PMOSFETs with high-k dielectric layer, metal gate, and GeSn alloy S/D stressors were studied. It was found that the geometric effects, such as channel width and length, could impact the achievable transistor performance gains. The resulted mobility improvement was analyzed by Kubo-Greenwood formula. This work helps the future Ge-based CMOS device design and...
A formal model of the interaction of motivation, emotion and cognition is developed and tested in a subsequent simulation. We tried successfully to simulate the behavior of “persons” with different traits of personality according to the Big-Five dimension “introversion - extraversion”. It can be shown, that the different forms of behavior of these two types are due to interactions of motivation, cognition...
Comparative reliability of hot carrier induced electrical performance degradation is reported in power RF LDMOS transistors after novel methods for accelerated ageing tests with electrical and/or thermal stress. The effects of the reliability degradation mechanisms on the S-parameters and in turn on static and dynamic parameters are pointed out. The analysis of the experimental results is presented...
Due to the proliferation in the number of vehicles on the road, traffic control system is one of the major problems in the current world. This paper aims to improve multilevel parking facilities by the introduction of a new smart parking system. The new circular underground basement of the parking system reduces the space and the simple rack pinion mechanism used to lift the vehicle reduces the cost...
This paper proposes an improved push-pull forward (PPF) three-level (TL) converter. The proposed converter can operate in three-level and two-level modes. The flying capacitor can be removed by the proposed control. Four switches sustain only half of the input voltage, which can be clamped by the input divided capacitors. The others sustain one and a half of the input voltage in three-level mode and...
In this paper, application of modeling and simulation (M&S) in conjunction with FMEA/FMECA for high-risk failure modes in the product development stages is demonstrated. The effectiveness of the proposed approach is illustrated with a suitable example in the area of bio medical devices, a complete hip-replacement implant. Identifying and mitigating failure modes associated with this product is...
Fatigue strength is of prior concern for automotive chassis parts design. In a reliability framework, its assessment still requires long and expensive test campaigns. In particular, high-cycle endurance tests usually involve several specimens undergoing million-cycle procedures. In order to reduce the specimen number (e.g. expensive prototypes) and to shorten testing procedures (i.e. time-to-result...
Integration of rooftop PVs in residential networks at moderate penetration levels is becoming a reality in many countries including Australia. However, the detrimental effects associated with the high penetrations levels of rooftop PVs are not fully explored to most power utilities. It is expected that the sophisticated structure and communication backbone of smart grid allow easy, safe and reliable...
This paper researches a modified single-phase power-factor-correction (PFC) AC-DC buck-boost converter, which is operated in discontinuous conduction mode (DCM) by using a simple control scheme to achieve almost unity power factor, low total harmonic distortion of input current (THDi), and step-up/down DC output voltage for universal input voltage applications. This converter has low voltage stresses...
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