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This paper presents the analytical design procedure to select the inductance and the capacitance values of both the input and output filters for the 5-Level three-phase Back to Back E-Type Converter (5L3Φ BTB E-Type Converter). The 5L3Φ BTB E-Type Converter is used to accomplish the double conversion AC-DC/DC-AC in applications which include variable speed industrial electric drives and the interfacing...
At present, the field of power factor corrected (PFC) rectifiers are very much matured. Typically a single phase PFC converter requires measurements from three independent sensors i.e. input voltage, input current and output voltage. By considering a need of farther compact and more flexible in terms of input to output voltage gain, a new UPF rectifier with two buck-boost converter operating in interleaved...
This paper presents an improved single phase seven-level active rectifier architecture controlled by finite control set model predictive control (FCS-MPC). The FCS-MPC is designed to enable power conversion with a unity power factor and generate seven level voltage waveform at the input. The proposed active rectifier architecture reduces harmonic contents of the rectifier input current by producing...
In order to enhance the ability of harmonic suppression for multi-pulse converters (MPCs). This paper proposes a novel pulse multiplication method at DC side of MPCs. The presented rectifier consists of a three-phase bridge parallel structure 12-pulse rectifier and a novel double winding tapped inter-phase converter (TIPC). The functions and characteristics of delta-connected autotransformer and ZSBT...
Renewable energy is gaining more attention because conventional power plants are facing several environment problems. In the present scenario, wind power grid interfacing is one of the favorable approaches for electricity production. This paper introduces the MATLAB modeling and simulation of 5-Level and 3-Level neutral point clamped inverters for grid interfacing using SEPIC converter for wind energy...
A new topology of single-phase SEPIC (Single Ended Primary Inductor Converter) AC-DC converter with low input current THD and high input power factor is proposed. Instead of using a single phase rectifier followed by a boost DC-DC converter, or using a bridge rectifier with two diodes and two switches, the rectifier's input is chopped at high frequency during positive and negative cycles by a single...
A two-stage power conversion architecture for the transmitter in wireless power transfer applications is introduced. The system achieves high efficiency at output powers up to 100W, and exhibits constant output current over varying load impedance. A front-end bridgeless totem pole rectifier provides power factor correction (PFC), necessary at the designed power level. This rectifier achieves high...
This work examines the potential of a GaN-based synchronous rectifier as a receiver in 6.78 MHz wireless power transfer (WPT) applications. Compared to a traditional diode-based rectifier, the synchronous rectifier has merits in its additional control freedoms. The active control of switching actions can be used to alter impedance presented to transmitting source, or, when combined with a zero-voltage...
This paper presents the design of a modified Vienna rectifier for single phase power factor correction (PFC) under RL load. This research proposes a newly developed scheme consist of a modified Vienna rectifier for converting AC to DC, a simple control circuit for controlling single phase modified Vienna rectifier switching, a single phase inverter (H-bridge) for converting power from DC to AC, a...
In this paper, an electronic phase-shifting strategy has been optimized for a multi-parallel configuration of line-commutated rectifiers with a common dc-bus voltage used in motor drive application. This feature makes the performance of the system independent of the load profile and maximizes its harmonic reduction ability. To further reduce the generated low order harmonics, a dc-link current modulation...
Line Commutated HVDC converter stations consume large amount of reactive power. If the converters are connected to weak grid, then the reactive power is provided locally using large capacitor banks or synchronous generators. These capacitor banks along with filters possess most part of the converter station. Construction of such a large converter stations for off-shore application is very difficult...
This paper presents a low harmonic 12 pulse rectifier. Then in order to investigate the influence of leakage inductance on 12 pulse rectifier. A set of improved switching function method is proposed. To obtain the mechanism that input current harmonics can be suppressed by circulating current of DC side, this paper analyzes the relationship between input current, output current and circulating current...
Rectification is a very common term in power electronics sector, where an AC signal is converted into a DC signal. But this process comes up with few problems, such as, distortion of input current. With high amplitude, the total harmonic distortion (THD) increases. To solve these problems, passive filtering is used to decrease harmonic distortion and to improve the nature of input current. But filtering...
This paper investigates the integrated 3-Phase AC-DC Buck-Boost converter designed to works with a great range of input AC voltages and produce a great range of output DC voltages which is similar to Conventional Converter with a sophisticated control in input section. The reduced switch converter with input Filter see through per phase voltage instead of Line voltage as in case of Conventional Converter...
In this paper an improved switched mode telecom rectifier for a 12kW telecommunication system is presented. An improved telecom rectifier is a combination of phase-shift transformer based ac-dc converter and passive high pass filter. The phase-shift transformer and high pass filter is realized with a fractional magnetic rating of the load. The supply current is almost sinusoidal with low total harmonic...
Finite control set model predictive control (FCS-MPC) is very effective and simple control approach which has been suitable for control of various types of power converters. It is a very flexible tool because it evaluates an arbitrary cost function which directly influences converter behavior according to particular demand. For an accurate numerical calculation of the cost function, discretization...
The need of controlled rectifiers to provide input power factor correction with reduced harmonic content drawn from ac mains and regulated dc output voltage has motivated the proposal of various topologies based on the classical converters such as boost and buck-boost topologies. Distinct control techniques have been also introduced with the commercial availability of integrated circuits (ICs) to...
Traction converter with medium frequency transformer (MFT) presents current trend of modern locomotive drives topology. Traction drives based on MFT significantly reduce weight of bulky low frequency traction transformers and present modern traction converter topology. Single-phase converters connected to the AC trolley line suffer by second harmonic voltage ripple on DC side. Second harmonic on DC...
High capacity of direct current is essential in many industrial processes. Conventional methods for obtaining high amount of direct current involve parallel operation of converters with multi-pulse rectifier. The multi-phase transformer combined with rectifier in the system increases overall size of the system and also provide limited control over the operation. This paper presents simpler topology...
A multilevel boost PFC (Power Factor Correction) rectifier is presented in this paper controlled by cascaded controller and multicarrier pulse width modulation technique. The presented topology has less active semiconductor switches compared to similar ones reducing switching losses as well as the number of required gate drives that would shrink manufactured box significantly. A simple controller...
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