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Multi-modular converters have proven to be one of the most suitable topology to be used in high and power applications. The modularity of these configurations offer several advantages, such as: high quality voltage, redundancy and high efficiency. In these converters, the series connection of modules increase the number of voltage levels, but also the floating voltage of modules with respect the neutral...
Due to the structural design of the traditional matrix converter, the voltage transfer ratio is limited to 0.866. In this paper, we purposed a new one-step boost type matrix converter, which can change the voltage transfer ratio variable from the perspective of changing the topological structure. The topological structure of one-step boost type matrix converter not only improved the voltage transfer...
In this paper, the bidirectional charger/discharger is developed on T-S fuzzy models. The circuit topology is constituted by Buck and Boost converters. The non-ideal element model is considered in the circuit. First, the state space average method is adopted to obtain the state equations of the bidirectional charger/discharger. Next, the output voltage controller is designed based on T-S fuzzy models...
Nowadays, DC/DC converters are widely used in industrial applications and renewable energy systems. A SEPIC (single-ended primary inductance converter) DC-DC converter is capable of operating in either step-up or step-down mode and commonly used in a battery charger system. This paper presents the modeling and analyzing of the SEPIC with coupled and uncoupled inductors. In this study, the state-space...
This paper presents the initial results of our research effort to fully integrate a voltage regulator with a Maximum Power Point Tracking (MPPT) circuit in order to harvest maximum power from solar cells or panels. We take a novel approach to emulate the inductor in a buck-boost voltage regulator using a Generalized Impedance Converter (GIC), thereby eliminating the requirement for the grounded inductor...
This paper deals with a master-slave control strategy for a ISOP (input-series and output-parallel) connected full-bridge DC-DC converter system, and each separate module is controlled by phase-shift control method. The master module regulates the output voltage of the whole system, and overcomes the problem of narrow range of output voltage regulation. The slave module balances input voltages between...
Two solutions of modified controlled gain voltage differencing current conveyor (CG-VDCC) - based inductance simulator are reported in this contribution together with the main performances (electronic control of inductance value and electronic control of value and character of losses). Verifications of all available features are provided by Spice simulator with behavioral models employing commercially...
This paper presents a small-signal analysis of the pulse-width modulated (PWM) boost dc-dc converters operating in continuous-conduction mode (CCM) and subject to complex impedance load. Using the existing knowledge on the small-signal model of the boost converter obtained through the circuit averaging approach, this paper presents an extended analysis of the small-signal transfer functions, under...
This paper presents a detailed analysis of two-level bidirectional five-phase PWM rectifier. The operation of the rectifier in steady-state is described, including the modulation strategy. Modeling of the rectifier is developed in rotational reference frame and small-signal models for phase current and output voltage control are presented. A control strategy in dq frame is presented to ensure the...
This paper conducts modeling and controller design for a SEries-connected Output Universal Link (SEOUL) converter. The SEOUL converter was proposed to interface multiple distributed power sources to the grid with a reduced amount of reactive components. It employs a high-frequency (HF) transformer instead of a bulky line-frequency transformer like solid-state transformers (SSTs). In addition, it does...
In this paper, a new cell based Modular Multilevel Converter (MMC) for AC-AC and AC-DC applications is presented. The new topology makes use of an efficient Packed U-Cells (PUC) structure to form the Multi-Cells Modular Multilevel Converters (M3C). It is a member of MMC root family, with extended operational capability covering therefore AC-AC and AC-DC modes of operation. A dynamic model of the PUC...
A breadboard model of the store of kinetic energy with an asynchronized electric machine and a cascade frequency converter in a rotor circuit is created. The converter is executed on the basis of a single-phase blocks connected to the network through transformers and connected from the rotor consistently in each phase. Transformation blocks contain single-phase active rectifiers and voltage inverters...
Bi-directional inductive power transfer (BD-IPT) systems are suitable for applications such as wireless integration of Electric Vehicles (EV) with the utility grid. This paper presents a comprehensive comparison of the performance between the two most widely used BD-IPT systems in EV applications - a parallel tuned inductor-capacitor-inductor type BD-IPT system and a series tuned inductor-capacitor...
The conventional Modular Multilevel Convertor (MMC) couldn't operate in low frequency for high voltage motor drive, because of the cell capacitor voltage fluctuation increasing severely with frequency decreasing. This paper presents a new back-to-back topology of MMC with auxiliary voltage clamping circuit for motor drive. The auxiliary circuit use soft-switch strategy to transfer energy between the...
The purpose of this paper is to analyze the impact of interconnection inductances to overvoltage during turn-off transient of silicon carbide (SiC) devices. To understand the switching behavior of the SiC devices, the ringing and overshoots of the voltage caused by the device capacitance and interconnection inductances are considered. Parametric studies are conducted to compare the influences of printed...
An impulsed-power supply used to eliminate arcing phenomenon and to maintain lamp luminance for field emission lamp is presented in this paper. To compact the system configuration and to reduce the system cost, the flyback topology is employed as the main circuit. Next, the phase-locked loop technique is embedded as a feedback mechanism in this study. With the proposed control mechanism, the peak...
The dual-active bridge (DAB) is a dc-dc converter, which offers several advantages especially in high-power applications. Besides bidirectional power flow and small filter size, the converter provides galvanic isolation via a medium-frequency transformer. The converter's inherent soft-switching capability promises very high efficiency due to the reduction of switching losses. In this paper, different...
This paper briefly reviews several circuits of white light LED driving structure, which includes the voltage regulator and current limiting resistance model, current regulator and current limiting resistance model, multiple current regulator model and inductance boost model. The paper also presents power loss analysis model to realize circuits performance. The analysis models can be used in the pre-driver...
In this paper, a coupling finite element method (FEM) of magnetic field and circuit of traction power transformer is established, including a two-dimensional finite element model and four-quadrant rectifier circuit. The no-load and short-circuit characteristics of traction power transformer are calculated and the value of impedance voltage is given. The space distributions of flux density, magnetic...
This brief presents a new structure of active inductors. These synthetic inductors are designed using current controlled voltage sources. The signal flow graph method is used for this purpose. For the practical realization, operational transresistance amplifiers (OTRAs) are replicated using current conveyors. The proposed inductors have very interesting properties because the value of its inductance...
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