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The Power Distribution Network of a PCB based system is largely influenced by the switching noise from power converters. This paper presents the nonlinear behavior of the DC-DC Buck converter as EMI generator. Time sensitive data collector are based on high speed real time systems which require high quality of power and ground distribution network. By analyzing the interferences generated by the switching...
The nonlinear characteristics of a voltage source inverter (VSI) with pulse width modulation is one of the biggest problem for sensorless ac motor drives because of both the output voltage error and the distortion of the output current. We have studied on the output voltage error of a VSI which mainly depends on the instantaneous current value at turning-off the self-commutating devices, such as IGBT...
In Photo-Voltaic (PV) systems to increase the conversion efficiency, efficient converters and efficient PWM switching circuits are required. To design efficient converters and PWM switching circuits mathematical models are necessary. In the proposed study, the mathematical model for photovoltaic cell and for buck-boost converter is developed. In the mathematical model, the parasitic elements of switch,...
This paper presents a comprehensive modeling, simulation and computational implementation of buck converter. Four modeling approaches of buck converter including mathematical, circuitry, transfer function and state space modeling are presented. Each modeling approach is demonstrated with various computational implementation methods including graphical, functional block and text based programming in...
It presents an effective circuit configuration of multilevel inverter which can increase the number of output voltage levels compared with the conventional cascaded H-bridge multilevel inverter. The proposed multilevel inverter consists of a dc input source with a series of capacitors, diodes, active switches for synthesizing output voltage levels, and an H-bridge cell. To generate seven levels in...
This paper presents a hardware/software co-simulation framework for power converter embedded software design. The methodology models all important power converter electronic circuitry in fine detail, and then uses the actual firmware source code of the physical digital signal processor to create a near-to-real simulation framework. Averaged model representations of the converter's switching processes...
This paper takes a fundamental look at the mechanisms underlying the stability of single-edge pulse-width modulated current regulator loops. The analysis applies to continuous-time or highly oversampled digital current regulators. It is shown that pulse-width modulation is essentially a sampling process. Associated with this sampling process is a small-signal z-domain model of the pulse-width modulator...
A switch-based, sampled-data, three-phase, pulse width modulated (PWM), voltage-source inverter (VSI) model for dynamic analysis has been derived and compared with the existing latch-based model. Comparisons were made for both time-domain, large-signal and z-domain, small-signal analyses. The switch-based model has the advantage of including inverter switching ripple current in the time-domain, large...
Modeling and simulation of power-electronic systems is essential for design and verification of numerous electrical energy systems. Uses of detailed switching models increase the computing time. This paper presents the averaging of the DC/AC half-bridge converter and the three-level half-bridge neutral point clamped (NPC), as well as their computational assembling. The equivalent models are validated...
This paper presents work on modelling and simulation of single-phase matrix converter with buck or boost rectifier operation. Both buck or boost rectifier operation are implemented using the same topology. This is facilitated through proper switching control algorithm. The circuit behaviour is verified by MATLAB/Simulink simulation results. Selected experimental result are also presented to illustrate...
An nonlinear simulation model of the Switched Reluctance machine with the operation at four-quadrant founded on MATLAB is presented. The simulation of the prototype with three given rotor speeds and four different loads are made. The simulated results on the rotor speed curves, the rotor speed ascending time and the phase current waveforms are given. It is shown that the operation of the Switched...
This paper proposes an efficient PWM switching function for modified H-bridge based multilevel inverter. The prior H-bridge based multilevel inverter can increase the number of output voltage levels by adding switch components and DC input voltage sources. If it employs seven switches and three DC sources, the number of output voltage levels becomes seven. Although its THD characteristics are improved,...
The technique of averaged modeling represents a DC-DC switched converter by a continuous-time model for quantities averaged over the switching period. The paper presents a universal procedure for symbolic analysis of converters using the generalized model of PWM switch. Both line-to-output and control-to-output small-signal responses can be obtained in symbolic form. Example analyses using the symbolic...
This paper describes a method of handling the real-time simulation of electric power circuits by utilizing multi-rate sampling of the external input control signals for solid-state switches. With pulse-width modulation frequencies of 10 kilohertz and higher, sample frequencies of at least 1 megahertz are often required to realize sufficient accuracy in a real-time simulation of the overall circuit...
This paper presents a novel model for average current control that can be applied to the buck-cascaded buck-boost converter (BuCBB) with two independently controlled switches in universal input power factor correction (PFC) circuits. The proposed BuCBB PFC model consists an averaged BuCBB topology with all the switching elements replaced by dependent sources and an average current control scheme with...
Techniques for sampled-data modeling and control design of nonlinear pulse-width modulated systems are introduced. The modeling results are based on formal exponential series with Lie derivative operators. The control design is based on a multirate strategy, useful for deadbeat tracking or feedback linearization.
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