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Unlike to current transformer, a residual current sensor is highly sensitive to the input leakage current and core material. It senses the leakage current that is produced due to faulty condition in the electrical circuit or unintentional body touch to the equipment through conductive tracking of the insulation medium. The leakage current which the sensor detects consists of ac residual current with...
This paper aims to present the power quality analysis of Multilevel Inverter (MLI) phase controlled systems. The analysis is achieved by developing models for five-level MLI systems in continuous conduction mode. In this mode, the switching angle of the thyristor is varied in order that it can be operated in inversion mode. As compared to conventional line commutated DC-AC inverters which have higher...
This paper presents study of a DC-DC boost converters hybrid model based on explicit MPC. By putting a constraints on state variable, optimization problem is designed and computed off-line, which reduces the on-line computation complexity. In simulation results, reference tracking and disturbance rejection to change in load are performed to show the robustness of controller. The advantages of explicit...
In this study, we introduce an accurate capacitor-resistor model for nano-crossbar arrays that is to be used for power/delay/area performance analysis and optimization. Although the proposed model is technology independent, we explicitly show its applicability for three different nanoarray technologies where each crosspoint behaves as a diode, a FET, and a four-terminal switch. In order to find related...
In recent years, the modern power generation systems with complicated structure have witnessed rapid development and their working principles are of great variety and different properties. For most of the power generation forms, the switching of multiple operation modes exists in the whole working range, such as the wind turbine generation system, whose operating states are divided into four modes...
This paper proposes a novel and highly scalable multistage packet-switch design based on Networks-on-Chip (NoC). In particular, we describe a three-stage Clos packet-switch fabric with a Round-Robin packets dispatching scheme where each central stage module is an Output-Queued Unidirectional NoC (OQ-UDN), instead of the conventional single-hop crossbar. We test the switch performance under different...
The emerging traffic demand has triggered an impressive deployment of network infrastructure, including macro Base Stations (BSs) and Small Cells (SCs), leading to increased energy consumption and expenditures. However, the network underutilization during low traffic periods (e.g., night zone) enables the Mobile Network Operators (MNOs) to save energy by having their traffic served by third-party...
In this paper we proposes a synthesis of different mathematical models of power electronic converters based on Thevenin/Norton equivalent circuits. Those models, composed by impedances and harmonic noise sources, are helpful to predict the conducted ElectroMagnetic Interferences (EMI) generated by converters connected to the electrical network. Moreover, the extracted impedances contribute to improve...
This paper describes analytical and simulation tools to analyze the effects of Open Switch Fault (OSF) and Open Phase Fault (OPF) on five-phase PMSM designed for aerospace applications. For such applications, the fault tolerance and the reliability of the drive (PMSM and the power converter) are important to take into account for design. The addressed work aims essentially to analyze the dynamic of...
These days electrolyzers are becoming more and more interesting due to the high demand for energy storage in form of hydrogen for renewable power generation using fuel cells. The design of a power supply for such a system is complex especially when the DC-link capacitance is reduced. By substituting the complex switching model of the power supply with a simplified one, the system dynamics can be better...
The Solid State Transformer (SST) is considered one of the most promising components in future energy systems. Its multiples advantages make it a promising solution in the future power grid when compared with the conventional fundamental-frequency transformer. Among different components, the Dual Active Bridge (DAB), consisting of two H-bridges and a high-frequency link, it is considered the key in...
As software functions can be separated from the device hardware, new techniques as SDN and NFV can be enabled in the management and operation of communication networks. However, the automatic configuration and SDN tools give only moderate information to the control or orchestration systems, and this can affect the performance and reliability of the managed network. The control and orchestration functions...
As modern cyber-physical systems (CPS) are often mobile, their operating environments varies during run-time in an unpredictable way. Existing varying-speed platform model often takes immediate performance change into consideration, which may be too pessimistic in their analysis, as the aforementioned environmental changes (e.g., thermal) often results in mild performance drops. A more sophisticated...
The noise induced by variations in power supply adversely effects System-on-chip (SoC) performance and these effects could be understood through modelling and analysis of Power Distribution Network (PDN). This paper presents modelling of PDN by incorporation of BGR and LDO for analyzing the effect of supply induced noise on the PDN performance. The effect of Simultaneous Switching Noise (SSN) resulting...
Bayesian inference has proven itself to be a practically useful tool for many scientific fields. The exact Bayesian inference is, however, possible in only a narrow class of probabilistic models enjoying the conjugacy principle. It is rather typical that the principle does not hold, and therefore the approximate Bayesian inference methods are taken into account. The present paper compares some of...
In this paper, a simplified analytical frequency model of conducted EMI generated by a DC/DC converter is proposed. The methodology is based on the relationship between the noise source and the propagation path. The effect of the parasitic elements was taken into account in the noise sources waveforms. The proposed method was verified by comparing the improved models results with the time domain simulation...
In some industrial applications, there is a long motor cable connected between the inverter and the induction motor of a motor drive system. However, the common-mode (CM) currents flowing through the cable and motor in the drive systems could bring electromagnetic interferences (EMI) problems to the surrounding electronic devices and shorten the life of motor bearings. It is necessary to study the...
A CE test layout with LISN at output side is proposed for a telecommunication immediate bus converter, which includes load's RF input impedance influences. Both the CM and DM paths of the interleaved Boost converter are analyzed in detail. The CM role of the output voltage ripple noise of the converter is explained and a non-intrinsic CM phenomenon caused by original DM sources is discovered too....
This paper firstly introduces the principles of SPWM (space vector pulse width modulation) and SVPWM (sinusoidal pulse width modulation), and then builds PMSM (permanent magnet synchronous motor) control system simulation models based on SPWM and SVPWM in MATLAB/Simulink environment. Finally, by comparing the simulation results of the two models, we got the advantages and disadvantages of SPWM and...
This paper is concerned with the design of robust Hm controllers for a class of networked switched discrete systems under asynchronous switching. The asynchronous switching means that the switching of the controllers has a lag to the switching of system modes due to the limited bandwidth of networks. By sampled asynchronous switched systems with time-varying delays and using sojourn probability information,...
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