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This paper proposes a comprehensive approach for the multi-objective design optimization of switched reluctance machines (SRMs). An analytical model that predicts the electromagnetic (EM) behaviors of SRMs with arbitrary geometries, materials or current profiles is first developed and validated by its finite-element analysis (FEA) counterpart in terms of various performance indices. Then, a hybrid...
Hydro-generators with skewed armature slots have damper interbar currents that flow transversely between the damper bars through the core. The interbar currents may involve harmonic and local overheating issues. The interbar resistance is a vital factor that affects the distributions of interbar currents and damper bar currents. A multislice finite-element model with integrated interbar circuit is...
A hardware test-bed (HTB) has been developed to realize power system emulation by mimicking the system components with universal three-phase voltage source converters (VSCs). The VSC-based transmission line emulator has also been successfully developed to flexibly represent interconnected ac lines under normal operating conditions. As the most serious short-circuit fault condition, the three-phase...
In order to ensure the stable operation of the power grid, this paper aims at the modeling of the integrated information system of the photovoltaic power plant, and the model of the PV module is divided into physical characteristics. In order to ensure the stability of the power grid, Model and external characteristic model. The PV module model based on the physical characteristics is based on the...
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...
Simulation of power converters is particularly necessary in the automotive industry where the requirements for rapid development and the right choice of components allow reducing design time and allowing engineers to verify by more simulations many of the preliminary versions of the electronic power schemes. In this paper we present the simulation of the back 48 to 14V converter required nowadays...
An integrated reset controller (voltage supervisor) is designed and implemented. The system generates a reset signal, active while power supply brownout conditions are detected and for 250 ms after the supply voltage has increased to acceptable levels. The circuit is built in a Deep N-Well (DNW) 5V 0.35μm CMOS process, which provides good isolation between the on-chip devices and the substrate. The...
Silicon carbide (SiC) MOSFETs have been widely studied in high frequency applications. The switching performance, however, is limited with the existence of the parasitic elements. One critical issue is the susceptibility of the gate-source voltage to the parasitic elements, rendering the possibility of spurious operation of the SiC MOSFETs. This paper conducts comprehensive investigations on the impact...
In this paper, three configurations of three-phase ac-dc cascaded converters are presented. They are referred as basic configurations, and are composed by two three-phase bridges, where the second bridge is cascaded to the first by means of a three-phase injection transformer. Basic configurations have one bidirectional option (composed only by IGBT switches), and two unidirectional ones (composed...
Multi-phase magnetically coupled resonant (MCR) wireless power transfer (WPT) technology, which can effectively reduce the limits of coils spatial locations on power transfer, has become one of the most promising technologies in the mid-range applications. In this paper, a three-phase MCR WPT system was investigated and the equivalent circuit model was built and simplified. Based on the theoretical...
This paper presents comprehensive validation tests of a recent qd0-frame core-loss model of three-phase induction machines at different load conditions. The machine is run at different frequencies/speeds and flux levels. These tests reinforce the model at different operating conditions before further model-based analysis and control design. Moreover, to properly use the model, a series of model parameter...
One of the key elements towards a decentralised energy sector is the consumers' choice and participation, as the concept of energy prosumer is gaining more and more ground and energy community projects are spouting across UK. In order for the upcoming energy systems to deliver their potential financial benefits, holistic design needs to be assessed by quantifying the most relevant design aspects (size...
This work investigates an approach to combining accurate lithium-ion battery (LIB) dynamic modeling and effective state-of-charge (SOC) prediction at various operating conditions using a structured recurrent neural network (RNN). The RNN model is trained with drive cycle data so that model parameters do not have to be determined with characterization tests, as is typically necessary for an equivalent...
This work deals with the implementation and development of a PSpice based modeling platform for 10 kV/100 A SiC MOSFET power modules. The studied SiC MOSFET power module is composed of a total of 9 dies connected in parallel with 10.0 kV blocking voltage capability. The proposed model was implemented based on the already established McNutt Hefner model originally developed for discrete single-die...
We present a set of tools for digital design, integration and verification of mixed-signal Application Specific Integrated Circuits (ASIC) developed within our design team. We have chosen Python for the development of the tools. By drawing on Python's features we have developed tools targeting many steps required across a design flow: a) Complex digital blocks are auto-generated, where Python generates,...
The present paper considers a problem of assessment of cybersecurity architecture of modern digital control system using a formal hierarchical model of the cybersecurity policy. As a basis for formal security model the extended discretionary take-grant security model is presented. The formal technique used to provoke thoughts about the way how the rights and information may be passed along the systems...
In this work, a simple electric circuit model for the evaluation of the impact of vias (inter-metallic vertical connections) in resonant rotary traveling wave oscillator (RTWO) is proposed. A test structure was designed to quantify the degradation on the signal integrity of RTWOs caused by these vias. The test structure and the RTWO were designed according to the rules of the 130 nm commercial mixed...
Ramsey theory assures us that in any graph there is a clique or independent set of a certain size, roughly logarithmic in the graph size. But how difficult is it to find the clique or independent set? If the graph is given explicitly, then it is possible to do so while examining a linear number of edges. If the graph is given by a black-box, where to figure out whether a certain edge exists the box...
The limits of the current electronic solutions restrict the use in harsh environments especially in high temperature (>300 °C). SiC is a material, which allows exceeding these physical constraints. AMPERE laboratory have developed SiC integrated circuits based on lateral MESFETs. This paper presents the first steps of the development of smart integrated driver circuit dedicated to harsh environments.
This paper introduces the unified equivalent circuit model for modular high voltage(HV) power generation architectures. The HV generation architectures are introduced considering the modularity of key HV components such as transformers or rectifier circuits firstly. An equivalent resister and capacitor circuit network is adopted to model the HV transformer and multi-stage voltage multiplier circuit...
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