PWM rectifier

About: PWM rectifier is a research topic. Over the lifetime, 2254 publications have been published within this topic receiving 25614 citations.

Neural Network Based Switching State Selection for Direct Power Control of Three Phase PWM-Rectifier

Abstract: This article proposes an intelligent approach to the Direct Power Control technique of the PWM rectifier, this control technique improves the performance of PWM converter, called Direct Power Control Based on Artificial Neural Network (ANN), applied for the selection of the optimal control vector. DPC-ANN ensures smooth control of active and reactive power in all Sectors and reduces current ripple. Finally, the developed DPC was tested by simulation, the simulation results proved the excellent performance of the proposed DPC scheme.

A three-phase PWM rectifier with active filtering function

Abstract: This paper presents a multi-function converter (MFC) as a viable solution to improve the power quality. The PWM rectifier (PWMR) operates as a rectifier to supply DC power to its linear or pulsating load and at the same time, operates as a shunt active power filter (APF) to improve the power-factor and to compensate harmonic and unbalanced currents drawn from non linear loads connected on the AC line. A simple control strategy which allows the converter to perform both functions (PWMR-APF) is presented. An energetic study of the MFC and passive elements selection is analysed. Simulation results made by MATLAB/SIMULINK under several loads configurations are presented to show the effectiveness and the reliability of the multi-function system.

A Novel Algorithm of SVPWM Harmonic Analysis Based on PWM Rectifier

Abstract: According to the operational principle of SVPWM and considering the characteristics of digital implement, a novel algorithm of SVPWM harmonic analysis based on PWM rectifier is proposed. This algorithm gives the expression of phase voltage harmonics through Fourier analysis, which provides the guidance for the design of grid side inductance. Since the harmonic spectrum of ac-side phase voltage of PWM rectifier is influenced not only by pulse modulation style, but also by the parameters of close-loop adjustors, a three-phase voltage source inverter controlled by TMS320F2812 has been built to obtain the harmonics purely generated by SVPWM and verify the algorithm. Power analyzer PZ4000 has been adopted to acquire experimental results. The good agreements between experimental results and those obtained in calculation demonstrate the accuracy of this algorithm.

Transient Modeling and Control of the Novel ZVS Z-Source Rectifier

Abstract: This paper presents the analysis of dynamic response of the ZVS Z-source rectifier and design of the closed-loop controllers for both the z-source rectifier and the z-network circuit. Due to the unique Z-network, the transient response is found to be challenging in controlling the ZVS Z-source rectifier. By combining the traditional PWM rectifier model and equivalent model of the z-network. The ZVS Z-Source rectifier model is proposed. Through detailed analysis, the controllers are designed to obtain the steady DC-link voltage and a sinusoidal AC voltage under linear loads.

Design and Comparative Evaluation of Three-Phase Buck+Boost and Boost+Buck Unity Power Factor PWM Rectifier Systems for Supplying Variable DC Voltage Link Converters

Abstract: A three-phase boost+buck PWM rectifier system formed by series connection of a boost-type rectifier input stage and a DC/DC buck converter output stage and a three- phase buck+boost PWM rectifier system comprising a three- switch rectifier input stage with integrated DC/DC boost converter output stage are presented and comparatively evaluated. Both systems are characterized by sinusoidal in- put current and wide output voltage control range. Analyti- cal expressions for the calculation of the current stresses on the power components and results of transistor switching loss measurements are provided as guidelines for the system design. Furthermore, the overall efficiency, the loss contri- butions and the volume and weight of the main components are given for 6kW rated system output power at 400Vrms line-to-line input. In combination with an assessment of the realization effort this provides a basis for the selection of the appropriate topology for an industry application.