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In This paper we are presenting a bidirectional DC-DC converter is also known as dual active bridge (DAB) dc-dc converter. We presented a Z-source with bidirectional dc-dc converter by reducing the switching count by adding the passive elements we are improving the output voltage level, Comparing with the traditional bidirectional dc-dc converter, the proposed converter has an wider regulation range...
This paper present the parallelization of firefly algorithm for permutation routing in baseline multistage interconnection network. The proposed parallel firefly algorithm employs a self routing approach to route the permutation in baseline network. The objective of this paper is as follows (i) to improve serial firefly algorithm to parallel one for better utilization of multi core/ many core processor...
The maximum exploitation of the favorable properties and the analog nature of memristor technology in future nonvolatile resistive memories, requires accurate multi-level programming. In this direction, we explore the voltage divider (VD) approach for highly controllable multi-state SET memristor tuning. We present the theoretical basis of operation, the main advantages and weaknesses. We finally...
A new method for reducing harmonics involved in input voltages of a three-phase voltage source diode rectifier is proposed. It is applied to the conventional 6-step diode rectifier with a three-phase autotransformer. By injecting harmonics to the neutral point of the autotransformer from an auxiliary circuit, input voltages of the proposed diode rectifier can be almost the same as a conventional 36-step...
In two-level PWM rectifiers, two common control strategies are respectively VOC (Voltage Oriented Control) and DPC (Direct Power Control). In high power applications, the converter performance may suffer seriously from the non-ideal characteristics of the sampling and control system. The effects of the non-ideal characteristics will be analyzed in this paper for classic VOC, DPC and PDPC (Predictive...
The structure of switch table mode direct torque control (DTC) is simple, in which the stator flux space is divided into 6 regions. But traditional stator flux sector judgment is much more time-consuming due to the trigonometric calculations in the orthogonal stationary coordinates. A new method is proposed to make stator flux sector judgment which is implemented in 60° coordinate system.
In this paper, in order to decouple the design parameters of power bipolar junction transistors during their extraction, our work focuses on the study of the variation effect of the design parameters on the static and dynamic characteristics of the power BJT. Indeed, an attempt is made to assign a specific characteristic to each design parameter, which has a significant influence while taking into...
The new generations of aircraft embark, growingly, avionics systems and functions to increase passengers' security and comfort. Therefore, a huge increase in data traffic is generated. Higher rates with more interconnections become necessary. However, Conventional avionics communications busses cannot meet these new needs. They are prompting avionics manufacturers (Airbus and Boeing) to install on...
In order to regulate the output voltage in converter system with four-quadrant characteristic a quasi-Z-Source Converter (qZSC) is preferred. The converter can provide bi-directional current and bipolar output voltage with minimal number of elements. In this converter two active switches with complimentary commands and a quasi-Z-source network is required and there is no need to coupled inductors...
In this paper, the new structure of non-isolated boost dc-dc converter is considered as achieving maximum power transferring to load from a photovoltaic (PV) power network. To achieving maximum power point (MPPT) of operating mode, the Perturb-and-Observe (P&O) is applied after modeling of other part of this power network such as battery, bidirectional dc-dc converter and proposing new control...
In this paper switching sequences for a systematic error compensation in unary Digital-to-Analog Converters (DACs) are discussed. An efficiency of some switching sequences was simulated using MATLAB. The simulation results showed a correlation between switching sequence type and integral and differential nonlinearities (INL, DNL) reduction.
Pulsed power supply (PPS) is one of the electromagnetic forming (EMF) system components. Advances in power electronics converters led to more efficient and controllable pulsed power supplies. Development of solid-state based topologies in pulsed power applications have been considered in recent years. Using these topologies gives compactness and easiness to EMF systems unlike conventional structures...
In this paper, we provide a systematic design procedure for the construction of the controller of the affine nonlinear discrete-time studied systems. The proposed controller structure achieves the tracking of given reference trajectory even in the presence of external disturbances. It is based on the Internal Model control structure and the multimodel strategy when considering the fusion techniques...
This paper deals with the control design of an asymmetrical cascaded multilevel inverter. This structure therefore provides the capability to produce higher voltages at higher speeds with low switching frequency which has inherent low switching losses and high converter efficiency. Selective harmonic elimination(SHE) for asymmetrical multilevel CHB inverter control is proposed. The technique utilized...
This paper investigates the application of a current source inverter for interfacing a low voltage Photo-Voltaic (PV) source to the grid as a single stage configuration. The paper proposes a novel translated Space Vector PWM (SVPWM) to control the current source inverter to improve the dynamics of the system. The approach relies on the average dc bus voltage to operate the current source inverter...
This paper first introduces an existing circulating current controller for modular multilevel converter (MMC) through redundant voltage levels with detailed analysis for the controlled circulating current. To further reduce the peak-to-peak value of the circulating current at switching frequency and decrease the total control error, a fixed-band redundant state transition principle is put forward...
In this paper, a DC-DC buck converter using a multi-bit (two-bits) delta-sigma modulator to control segmented output switches of the converter is proposed to enhance its efficiency and improve its output ripple. This converter operates in continuous condition mode (CCM). Here, the two output bits of the modulator control the switching of the main and the supplementary switches. The circuit is simulated...
This work focuses on micro-grid, containing various alternative energy resources (wind and photovoltaic) and super-capacitor energy storage system which performs in stand-alone as well as in grid-connected modes. Various non-isolated converters are used to control the proposed micro-grid. A classical-based supervisory control scheme is designed to perform energy management in order to satisfy the...
Traction converters in automotive applications benefit from various emerging technologies like semiconductor-materials such as SiC or converter topologies like multilevel converters. As especially novel topologies often lack an analytic way to determine their power losses or efficiency, comparability is often hard to achieve until each converter is built up and measured. With the proposed procedure...
This paper analysis and compares the different driving techniques for the brushless DC motors (BLDC). First, the conventional block commutation technique used to drive the BLDC is discussed with respect to the produced torque ripple. Second, the modified techniques like the overlap and phase advance techniques discussed as well. Finally, a combined driving technique including the phase advance and...
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