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Showing 1 to 20 of 87 for “"equivalent circuit model"”.
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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
… for the difficulty in obtaining the small-signal model for current-mode control in the frequency domain. A continuous time domain model was recently proposed as a successful model for current-mode control architectures. However, the model was derived by describing function method, which is very …
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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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A nonlinear statistical MESFET model using low order statistics of equivalent circuit model parameter sets
A nonlinear statistical MESFET model is presented which shows good agreement with measured results. A single stage GaAs power amplifier tuned at 13.5 GHz is simulated with the model and accurately predicts output power, input return loss, and power added efficiency. Not only is nominal performance …
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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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Small Signal Equivalent Circuit Extraction From A Gallium Arsenide MESFET Device
… With these MESFET devices comes the need to 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. …
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Efficient Full-Wave Analysis and Modeling of Interconnects by FDTD and Signal Processing Techniques
An automatic extractor of the equivalent circuit model of high-speed circuits is given. The extractor is integrated with computer-aided-design (CAD) tools. The design files are parsed and design information is projected on the Yee-like mesh. The generated parallel FDTD codes are deployed in a …
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Induction machine stray loss from inter-bar currents
… of the extended per-phase induction machine equivalent circuit model in order to account for the impact of inter-bar currents. The average value of resistance between neighboring rotor bars significantly impacts calculations of rotor bar and inter-bar current and loss and has been determined …
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Modal based BGA modeling in high-speed package
… properties from fabricated multilayer printed circuit boards is proposed. Based on the electrical properties of fabricated transmission lines, the improved "Root-Omega" method applied to cases with smooth and rough conductors is validated using simulations. Error sensitivity analysis is …
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Stability Methods for Regulated Loads
Power electronic circuits often regulate load power and present a constant power profile to the utility or other electrical source. These constant power loads (CPLs) therefore exhibit a negative incremental input impedance and pose stability challenges when present in either dc or ac systems. This …
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Develop a Supercapacitor Real Time Model for PHIL Simulation
… for HIL and PHIL. For supercapacitors, equivalent circuit model can adequately represent the dynamic behavior, but this kind of model can be difficult to ascribe to physical meanings, which is significant for designing and scaling-up a commercial supercapacitor device. An …
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Modeling and Control of Modular Multilevel Converter
… to intuitively comprehend. Recently, a method of modeling of the MMC based on state-plane analysis and coordinate transformation, is proposed in the literature. Based on the state-plane analysis, two kinds of circulating power in the MMC are identified that are orthogonal to each other. This means …
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Characterization and modeling of crosstalk noise in digital systems and microwave applications
… dissertation presents the characterization and modeling of crosstalk noise based on the theory of coupled microstrip lines. An equivalent circuit model used in this work comprises of the addition of mutual inductances and mutual capacitances to the fundamental transmission line model. …
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Accurate Small-Signal Modeling for Resonant Converters
… However, the lack of an accurate small-signal model has become an impediment to performance optimization. Many modeling attempts have been made to date. Besides the discrete time-domain modeling, most continuous-time modeling approaches are based on fundamental approximation, and are thus …
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Organic solar cells based on liquid crystalline and polycrystalline thin films
… spectrum. Analysis using an exciton diffusion model shows this efficient carrier generation is mainly due to the large exciton diffusion length of pentacene films. Joint XRD and AFM studies reveal that the highly crystalline nature of pentacene films can account for the observed large exciton …
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Study on Three-level DC/DC Converter with Coupled Inductors
… the non-linearity of the inductor coupling, the equivalent circuit model is developed for the proposed interleaving structure. The model identifies the existence of multiple equivalent inductances during one switching cycle. A combination of them determines the inductor current ripple and …
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Estimation of the Developed Overvoltages at the Entrance of a HV/MV Substation
… positions of the system. The influence of the equivalent circuit model of the various components to the calculated overvoltages is also examined. Moreover, the substation outage rate due to lightning strokes is calculated, considering shielding failures and back-flashovers. In addition, special …
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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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Monte Carlo simulation for high-frequency intrinsic noise analysis of MOSFET
… we calculate the parameters of the small signal equivalent circuit model and finally model our device into noise two-port model. A 30 nm double gate FinFET is chosen as a simulation model and the intrinsic noise of the device is examined. As a result, the double gate FinFET showed lower gate and …
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