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This paper proposes a new modeling method for buck converter. The new modeling method, named bi-switching status method (BSM), for buck converter is obtained via the propositional calculus and linear constrain. Based on the mixed logical dynamical (MLD) model, BSM model of buck converter is obtained. Compared with other modeling methods, such as MLD method and state-space averaging method, streamlined...
The quadratic buck converter or the BUCK converter presents a non-linear dc-dc voltage conversion ratio. The large-signal model of the quadratic buck converter would possess greater number of higher order nonlinear ac terms compared to that of the conventional buck converter. One can gain better insight by considering the linear model to understand the dynamic characteristics of these converters....
This paper proposes a design close loop for series resonant converter based on generalized state space averaging modeling for the resonant converter. In addition, this study covers both the steady state analysis and small signal modeling for the series resonant converter, working under zero voltage switching conditions. The proposed closed loop system, which uses PID controller and the Observable...
A new method for modeling switched-linear systems is presented: switching devices are modeled ideally using parametrized curves, and an efficient implementation for real-time simulation is proposed. Experiments on a rectifier topology for traction converters demonstrate the methods performance in terms of accuracy, stability and execution time, with a 50us step-size.
In literature three phase voltage source inverter models are based on one specific application considering only a limited number of switching state combinations and assuming certain load properties. This paper suggests a model considering all practical switching state combinations. Time dependent load behavior is also included in the model.
There are circulating currents among the parallel inverters. Based on the existing researches on circulating currents, an accurate model of switching frequency circulating current is proposed in this paper. Moreover, the relationships between the circuit parameters and switching frequency circulating current are investigated and analyzed in detail. Based on the analytical results, favorable design...
A generic circuit partitioning method is proposed which reorders the equations and variables of power electronic circuits with idealized switches and diodes in a specific bordered block-triangular form, where each block on the diagonal is dependent only on a small number of switches. The number of floating-point operations for sparse matrix triangularization, needed after a change of switch configuration,...
Three-phase ac systems can be transferred into dq axis, where stability analysis becomes much simpler. In order to apply the stability criterion in AC system, an equivalent DQ admittance model for the ATRU system has been developed in this paper, based on the ABC impedance model in paper [1]. Compared to the literature work, this model has two better features: (1) it is valid in a wide frequency range,...
This paper analyzes the stability issue of the Flyback converter which utilizes a second stage LC filtering circuit at its output side. The small signal models of the Flyback converter using second stage filter, in both DCM and CCM, are presented with experimental data collected to verify the theoretical analysis. Finally, guidelines for designing the second stage LC filter are derived to facilitate...
This paper introduces a new extended averaging method for switching power converters. By extending the conventional averaging techniques, this method is capable of modeling power converters with multiple switching frequencies. Using this method, a model for a cascaded dc-dc converter is derived. Comparison between the model and the non-averaged system is performed. Experimental verifications are provided...
With the improving evolution in VLSI technology most of the digital circuits are becoming SOCs. However most of the SOC systems are synchronous designs and the issues like clock skew, power consumption and EMI are related to clock network. Asynchronous circuits can offer benefits like reduced power and improved performance. However implementing whole design with asynchronous design style is a challenge...
This paper addresses the simulation of switched-capacitor circuits including capacitor nonlinearities at an intermediate modelling level, filling the gap between device level and behavioural level simulators. Starting with the resolution of the trivial case of integrator with ideal components, the impact of first- and higher-order capacitor nonlinearities is analyzed in detail and the related simulation...
This paper presents design and simulation of incremental conductance (IncCond) Maximum Power Point Tracking (MPPT) using self lift cuk converter. The solar panel model is developed using the basic circuit equations of photo voltaic cell. The MPP of a solar panel varies with irradiation and temperature. The IncCond algorithm is used to track the maximum power from the solar panel. The unregulated voltage...
The propose of this paper is to present the systematic processes of constructing the averaged small-signal model of the three-phase grid-connected three-level neutral-point-clamped inverter with a LCL filter and to design the control system for the grid current by using the model. The systematic processes are composed of the averaging, perturbing and linearizing step about the circuit equations. In...
This paper presents a simulation of PV system (PV panel, boost inverter and a resistance load) using M-file of MATLAB, To prove the efficiency of this system we applied two method of MPPT in the global algorithm, one classical and the other one is intelligent: the first one is called Perturbation and observation (P&O) used in stand-alone places or in simple installation and the later is based...
Analyzing a switch mode circuit under periodic excitations with variable duty cycle provides a way to predict how power efficiency varies with output power. The analysis with periodic signals mimics the behaviour of amplifying more complex non-periodic pulse encoded signals such as sigma-delta modulation (SDM). Equations are derived to predict the power efficiency of a RF current mode class-D (CMCD)...
In order to utilize memristors in circuits, one needs high-quality predictive models that can be used for simulations to act as a design aid. Whenever possible, we base our models on the known physics of the memristors we are using. To that end, we perform a wide range of materials characterizations and electronic measurements on which to base the model. However, given the complexity of the physical...
In this paper, the control of a grid-connected inverter is investigated. There are two key control issues that need to be examined. The first is the control of the AC side of the converter to ensure that sinusoidal output waveforms are produced and that the DC bus capacitor voltage that the six-switch bridge see is fixed. It will be assumed in this paper that the output of the inverter is being fed...
This paper presents a comparative study between P&O and sliding mode (SM) algorithm to track the maximum power of a PV panel using M-file of Matlab. To prove the efficiency of the proposed controller, these two MPPT in the global algorithm, one classical and the other one is intelligent. The different steps of these controllers design are presented together with their simulation. In one hand the...
Advantages of the switched-capacitor power converters are pointed out. Operation principles of ideal asymmetrical classical inductorless power converters with fractional conversion ratio are explained and simple design equations are derived. The results are justified with PSPICE simulation of a representative 5V to 3V power converter with ideal switches and capacitors but also using models of real...
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