Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 235 for “"equivalent circuit"”.
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Equivalent Circuit Model of High Frequency PWM and Resonant Converters
… a strong desire to develop simple and accurate equivalent circuit models to facilitate the design of these converters. Constant on-time current-mode control has been widely used in POL and VRM converters. For multi-phase application, external ramp is required to improve jittering performance …
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Equivalent Circuit Model for Current Mode Controls and Its Extensions
… the analysis and design of non-linear system, equivalent circuit model, which is user friendly and intuitive, is an effective tool. In this dissertation, the primary objective is to develop a unified three-terminal switch model for current-mode controls using the results of describing function …
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Small Signal Equivalent Circuit Extraction From A Gallium Arsenide MESFET Device
… model them. This thesis extracts a small signal equivalent circuit model from a Gallium Arsenide MESFET device. The approach taken in this thesis is to use measured S- parameters to extract a small signal equivalent circuit model by optimization. Small signal models and S-parameters are …
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A Dynamic Magnetic Equivalent Circuit Model For Design And Control Of Wound Rotor Synchronous Machines
<p>Recently, a new magnetic equivalent circuit (MEC) model was developed to support automated multi-objective design of wound-rotor synchronous machines (WRSMs). In this research, the MEC model and its application have been enhanced. Initial enhancement has focused on using the MEC model to explore …
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The application of genetic algorithms to parameter estimation in lead-acid battery equivalent circuit models
This thesis summarises the research work in the development of the battery status estimation algorithm. A model was developed to describe the process of battery discharge. Genetic Algorithms were used as a tool to identify the parameters of the battery, including the internal resistances, SOC, and …
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A nonlinear statistical MESFET model using low order statistics of equivalent circuit model parameter sets
… (means, variances, and correlations) of equivalent circuit model parameter sets and using these to produce a continuous distribution of devices representative of those seen from manufacturing. Complete nonlinear and statistical modeling extraction software packages are also presented …
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Circuit model extraction in digital and RD circuits using the partial element equivalent circuit (PEEC) method
"This dissertation discusses four topics relevant to power integrity and design, numerical modeling, and characterization and modeling of MEMS switches"--Abstract, page iv.
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Application of Exact Steady-State Equivalent Circuit Model to Zinc-Doped Silicon P/n Junctions Under Forward Bias
Made available in DSpace on 2014-12-12T20:54:52Z (GMT). No. of bitstreams: 1 7913406.pdf: 3108620 bytes, checksum: 7952fee23315f91512a15310d7188acd (MD5) Previous issue date: 1978
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Innovative Model based on the Irradiance-Temperature Fitting of Equivalent Circuit Parameters for Commercial Photovoltaic Modules towards Accurate Power and Energy Prediction
L'abstract è presente nell'allegato / the abstract is in the attachment
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Equivalent circuits of thermoelectric coolers.
Equivalent circuits are useful for simplified representation and deeper understanding of electrical devices. In this work a thermoelectric system is represented by equivalent circuits. The first part of work is introductory. It contains the definitions and derivations of the various thermoelectric …
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Unified Three-terminal Switch Model for Current Mode Controls
… not to mention time consuming. Although an equivalent circuit for a current mode control Buck converter was proposed to help designers to use the model without involving complicated math, the equivalent circuit is not a complete model. Moreover, no equivalent circuit for other topologies is …
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Application of PMU for system stability analysis with Thevenin equivalent modeling
… of the power system state by its Thévenin equivalent circuit. Rather than using simulators to model a power system, developing a Thévenin equivalent circuit for power grid enables a more reliable way to estimate the health of the system. As a continuation of the previously proposed …
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Induction Motors With Rotor Helical Motion
… frequency domain slip frequency technique. An equivalent circuit model is also developed to address helical motion in rotary armature that is based on the model suggested by Duncan to consider dynamic end effects in linear motors. The results obtained from FEM modeling and equivalent circuit …
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Thermal Modelling of the Ventilation and Cooling inside Axial Flux Permanent Magnet Generators
… the construction of a generic thermal equivalent circuit, which comprises of conductive and convective sub-circuits, to model the conduction and convection heat transfers and temperature distributions in the radial and axial directions, within these machines. The conduction heat …
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Measurement of antenna radiation efficiency using improved Wheeler cap algorithm
… resonant modes and the use of a simplistic equivalent circuit model, the conventional Wheeler cap method yields poor results for electrically larger structures. When efficiency estimates can be obtained, they are often valid only over a narrow frequency band. Higher-order equivalent circuit …
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Modeling multi-layer via structure using PEEC method
… is also incorporated into the physics-based circuit model to characterize the overall performance of the via transition. In the second paper, a rigorous modeling of the shared-antipad via structure is developed using surface partial element equivalent circuit (PEEC). The cavity Green's …
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