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.
Under the Internet of Things initiative, networks are designed to incorporate both sensing as well as switching/control action. The need for control action may arise in different physical domains. Bond graphs are a useful tool which provides modeling of multiple processes that simultaneously take place in different physical domains. The current work discusses the need to develop mathematical models...
Li Ion batteries are the proficient energy source for powering Hybrid Electric Vehicles (HEV) due to its smaller size, lighter weight, and improved charge efficiency without memory effect. The battery pack constitutes of a combination of cells in series and parallel configurations. Due to cell impedance mismatch, each cell possesses different potentials which cause different State of Charge (SOC)...
The purpose of this study is to design a LQR controller for the SEPIC (Single-Ended Primary-Inductor Converter) converter which is widely employed in industrial DC-DC power conversion and is also starting to see widespread use in PV applications. Circuit-Averaging-Method is used to acquire the mathematical model of the given system. Controllers are designed based on the Small-Signal model. LQR and...
This paper presents dc-dc converter based on voltage dividing class E amplifier. Class E2 dc-dc converter, which is one of the converter suitable for high operating frequency is studied. Class E2 dc-dc converter composed of a Class E amplifier and Class E rectifier. the amplifier side and rectifier side of class E2 dc-dc converter can achieve ZVS and ZDS. However, it is indicated that peak switch...
Energy storage cells have been widely used in many applications. Depending on the application, energy storage cells are connected in series to match the voltage requirement. Each the energy storage cell has individual differences such as internal impedance and self-discharging, which cause cell voltage imbalance. This paper proposes a switched capacitor voltage equalizer. The proposed equalizer combines...
Literature has shown that the interface circuit plays an important role in a piezoelectric energy harvesting (PEH) system. By referring to the general model of synchronized multiple bias-flip (SMBF) and the recent implementation of parallel synchronized triple bias-flip (P-S3BF), this paper introduces a new implementation called parallel synchronized septuple bias-flip (P-S7BF) for further enhancing...
Hybrid HVDC circuit breakers have become a key component for HVDC grids, which offer the combination of low losses of mechanical switches and fast switching actions of power electronic switches. The parameters of the circuit breakers have a greater impact on its interruption performance and size. In this paper, the transient characteristics of the hybrid HVDC circuit breakers with forced commutation...
High-voltage direct current (HVDC) circuit breaker with rapid fault clearing is an important equipment for protecting DC transmission system. The mechanical vacuum circuit breaker based on artificial current zero (ACZ) is excellent to interrupt the large current. A prototype of mechanical HVDC circuit breaker based on ACZ is simulated by Matlab in this paper. The main circuit breaker and the commutation...
Excessive IR-drop during scan shift can cause localized IR-drop around clock buffers and introduce dynamic clock skew. Excessive clock skew at neighboring scan flip-flops results in hold or setup timing violations corrupting test stimuli or test responses during shifting. We introduce a new method to assess the risk of such test data corruption at each scan cycle and flip-flop. The most likely cases...
In digital logic circuits, unconstrained scan tests are known to evoke much higher switching activity than functional modes. To create test conditions which are as similar as possible to functional modes, today's ATPG tools have knobs to constrain the switching activity of the generated test to a user-defined functional (= lower) level. Two-dimensional system chips (SoCs) and three-dimensional stacked...
The paper proposes a method to use the Fibonacci numbers with odd and even indices for synthesis of switched capacitor converters (SCCs) with multiphase control. As in the previously developed method using high-radix positional numeral systems, the capacitors in the proposed method can be connected in parallel. For this purpose, a special two-dimensional (2D) array of switches is introduced. Thus,...
Simulation of complex hardware circuits is the basis for many EDA tasks and is commonly used at various phases of the design flow. State-of-the-art simulation tools are based upon discrete event simulation algorithms and are highly optimized and mature. Symbolic simulation may also be implemented using a discrete event approach, or other approaches based on extracted functional models. The common...
This paper proposes a high-efficiency single-phase three-level bidirectional inverter. The proposed inverter has a three-level power switching circuit. It can reduce switch voltage stresses with low harmonic components. It has common-mode capacitors at the ac-filter to suppress the ground leakage current for high power quality. Its circuit operation and control strategy are described. Its common-mode...
Photonics technology has become a promising and viable alternative for both on-chip and off-chip computer networks of future Exascale systems. Nevertheless, this technology is not mature enough yet in this context, so research efforts focusing on photonic networks are still required to achieve realistic suitable network implementations. In this context, system-level photonic network simulators can...
Using virtual prototyping (VP) design tool to evaluate power converter electro-thermal performance can help designers to validate prototype in a quick way. However, different system time-scale requires efficient electro-thermal simulation techniques. Thus, an approach by using average power losses of one switching cycle is presented in the paper to decouple electrical and thermal simulation so as...
In this paper, a comparative analysis on three types of switched capacitor DC-DC converter, which are SCVM (Switched capacitor Voltage Multiplier) type, series-parallel type and Fibonacci type, is performed in same modeling way. The way is four terminal equivalent circuit model. In this model, it is possible to derive power efficiency and relation between input and output. In order to do the analysis,...
The paper presents the method of digital modelling of process of switching on by vacuum switch in capacitive circuits. Currently, there are few descriptions of vacuum switch models used for capacitive circuits switching on. More often researchers focus on vacuum switch models used for switching of the circuits (also previous works of the Authors) and even more often models used for switching of the...
Analog-to-digital converters (ADC) in switching mode are used to convert the signals from multiple sources of the ADC means. It was considered appropriate, since it was believed that this provides a significant simplification of the hardware. Today, the advantage of hardware saving is negligible in compare with the loss of measurement accuracy because of the use of switching mode, which is unreasonably...
To improve battery cell balancing speed, a novel switched capacitor (SC) circuit combining the conventional SC circuit and the optimized SC circuit is proposed in this paper. It has the advantage that the balancing speed is independent of number increase as well as initial voltage variation of battery cells. The equivalent model of the proposed circuit is developed and analyzed in this paper. Compared...
In modern CMOS processes, several non-ideal influences affect the functionality of integrated circuits. In order to analyze and reduce these influences, time intensive circuit simulations are performed at transistor level. Although numerous non-idealities are considered in such simulations, they cannot be analyzed separately since they are inherent parts of the transistor models and cannot be faded...
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.