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This paper presents a control scheme of a three-phase three-switch unidirectional delta-type rectifier, using a modification of discontinuous two-level space vector modulation (2L-SVM) strategy based on Vienna rectifier. The proposed arrange method was created, in order to procreate the discontinuous gate-drive signals for each power switch on the basis of five-segment switching sequence. For this...
Dead-time is added into pulse width modulation (PWM) signals to prevent a short circuit of the DC bus. However, adding the dead-time can cause higher total harmonic current distortion (THDI). In order to minimize this problem, this paper proposes a simple dead-time compensation technique for single-phase full-bridge PWM rectifier, which is used in power factor correction (PFC) application. The proposed...
The Vienna rectifier is a unidirectional boost type improved power quality ac-dc converter (IPQC). The rectifier topology is capable of providing a dc output voltage that is higher than the ac source voltage with improved power factor. The topology is compatible with the hysteresis current control (HCC) technique. It has the capacity to provide almost unity power factor with low current distortion...
The Non-Conventional sources such as wind energy is environment friendly, cost effective electric source. This paper introduces the modeling and simulation of wind energy conversion system using boost and SEPIC converter under variable supply conditions. These two wind energy system with boost and single ended inductor SEPIC converter are designed on MATLAB/SPS to simulate with three-level neutral...
Modular Multilevel Converter is a widely accepted technology for HVDC applications. It consists of several sub-modules or cells connected in cascade. These are bidirectional chopper cells and each one of them has a floating capacitor. This paper discusses the modulation and voltage balancing strategies which are essential for the converter to work as rectifier or inverter. The discussion is followed...
The power conversion circuit of a three phase Vienna or Modular-Boost switching power factor corrected (PFC) rectifier uses three controlled switches, eighteen diodes and two output split capacitors. Three PFC controller circuits are necessary for conversion circuit's voltage regulation, power factor control and input current waveform improvement. The circuit has been modified to have fewer active...
A new one-switch three phase power factor corrected (PFC) rectifier is presented in this paper. The proposed 3-phase ac-dc converter is based on Ĉuk topology. Proper feedback control of the circuit can maintain high power factor and low input current total harmonic distortion (THD). Use of minimum number of control switch in the proposed power conversion circuit reduces components, drivers drive isolation...
An input switch based modular Single Ended Primary Inductor (SEPIC) three phase AC-DC converter is proposed in this paper. The proposed rectifier has the advantage of step-up/down voltage gain with boost input stage. Input boost stage allows input current shaping accompanied by power factor correction. The topology will also provide possible capacitive isolation of input/output sides of the converter...
This work develops a novel single-switch current-fed series-parallel resonant converter for use in direct current (DC) energy conversion systems. The converter comprises a class-E inverter and a series-parallel resonant tank with a bridge rectifier. It uses a single active power switch to reduce the cost of the energy conversion system and control circuits. With a simple circuit configuration and...
Back to back (B2B) voltage source converter is used for HVDC system and ac drive system to control active-reactive power. In this paper reduced switch back to back converter is used for induction motor drive system which is operated in unity as well as leading power factor. Active and reactive power flow are independently controlled. The active power transfer is controlled by angle delta; where delta...
Wireless power transmission (WPT) via inductive coupling is used in many applications such as biomedical implants, sensors, and radio-frequency identification (RFID). Range extension, robustness against load (RL) variations and coil misalignments and rotations, and miniaturization of inductive links are key in such applications, demanding new architectures for the integrated power management (IPM)...
In order to simplify the commutation in the virtual rectifier, a zero current commutation model predictive control (ZCC-MPC) method is proposed for the induction motor drive system fed by indirect matrix converter (IMC). Switching states combination is adopted in the virtual inverter instead of single predictive switching state, which ensures that the inverter stage keeps at zero voltage vectors during...
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...
This paper proposes AC/DC converter with high frequency isolation. The proposed converter employs an indirect matrix converter (IMC) to convert three phase AC to high frequency AC using a novel snubber configuration and control suitable for implementation using 6-in-1 module. In an IMC, a snubber circuit is required instead of electrolyte capacitor in order to absorb energy of leakage inductor of...
In this paper, we develop an analytical model of a rectifier circuit that is used in wireless power transfer (WPT) systems, considering the switching timing, ON/OFF resistance, and load characteristics of the rectifier. The model enables us to estimate the performance of the rectifier and optimum load resistance that maximizes the output power and the power efficiency. The model can be extended into...
This paper presents virtual flux based model predictive direct power control (VF-MPDPC) strategy to control the three-phase three-level NPC PWM rectifier. In this strategy all equations for calculating and predicting instantaneous active and reactive powers values are based on mains virtual flux vector. The mains virtual flux vector is estimated by a first order low pass filter. The major aim of this...
Wind energy is one of the most promising and developed renewable energy resources. A power electronic interface is needed in order to connect a Wind Energy Conversion System (WECS) to the load or the utility grid. Control of this interface, which consists of generator- and grid-side converters, is a very important and demanding task. The main purpose of controlling the generator-side converter is...
Employing sliding mode controller in matrix converters presents advantages such as easy on-line implementation, quick and reliable choice of the correct switching combinations and ensuring that the system tracks their references. The main drawback of the sliding mode controller is chattering phenomenon which affects the performance of the controller by injecting high frequency variation in controller...
The matrix converters are a promising solution in the industrial domain applications, a compact size with high performances and large scale control capability with high quality energy. The integration of MPC (model reductive control) theory based on finite number of control input into drivers led to the development of innovative technique to improve the control optimality. Through this paper, an indirect...
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