Topic
PWM rectifier
About: PWM rectifier is a research topic. Over the lifetime, 2254 publications have been published within this topic receiving 25614 citations.
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15 Nov 2011
TL;DR: In this paper, a double closed loop control strategy composed of inner current loop and outer voltage loop in the d-q synchronous frame is proposed for the three-phase voltage-sourced PWM rectifier.
Abstract: The double closed loops control strategy composed of inner current loop and outer voltage loop in the d-q synchronous frame is a relatively common control strategy of the three-phase voltage-sourced PWM rectifier. The system can not be completely decoupled because of the variable inductance in the actual system. And for simple, the decoupled part of the controller is usually ignored. What's more, the equation of the outer voltage loop is nonlinear. According to the analysis of the model of the rectifier, a novel double closed loops control strategy composed of inner current loop in the complex vector and outer square of the voltage loop, is proposed. The inner current loop using the mentioned control strategy can be completely decoupled without the exact value of the boost inductance, and the equation of the outer square of the voltage loop is linear. From the results of the simulation, the mentioned control strategy can greatly improve the dynamic and static of the system.
12 citations
Journal Article•
SIDI1
TL;DR: In this article, the authors used a PWM rectifier to eliminate harmonics currents and reduce total harmonic distortion of the line current and improve the power factor of the rectifier.
Abstract: This paper treats control strategies of a pulse width modulation (PWM) rectifier to eliminate harmonics currents and consequently to reduce total harmonic distortion of the line current and improve power factor. It is about the use of direct control principle to control instantaneous active and reactive powers. Such a technique is called direct power control (DPC). The principal idea of DPC was suggested initially by Ohnishi (1991) and developed then by Noguchi and Takahachi in 1998. This concept is similar to DTC applied to induction motors. A comparative study, concerning the DC voltage control, will be given in this study. It is about the use of a PI controller and a fuzzy logic one to ensure a stable active power exchange. A digital simulation, in Matlab/Simulink/SimPowerSystems and Fuzzy Logic Toolbox, was carried out and given in the end of this paper. The simulation results show clearly the supremacy of the technique adopted to control the DC voltage. Streszczenie. Analizowano rozne strategie przeksztaltnika PWM umozliwiające eliminacje prądow harmonicznych a w konsekcencjio poprawe wspolczynnika THD. Zastosowano technike SPC - direct power control. Wykorzystano kontrolery PI i logiki rozmytej. Metody oceniono przeprowadzając symulacje. (Analiza porownawcza sterownika napiecia DC w przeksztaltniku DPC-PWM)
12 citations
21 Nov 2013
TL;DR: A new type charger for electric vehicle (EV) batteries that combines direct power control based on space vector PWM with phase-shifted zero-voltage zero-current-switching and decoupling control for instantaneous active and reactive powers of the grid is described.
Abstract: This paper describes a new type charger for electric vehicle (EV) batteries. The three-level PWM rectifier used Metal-Oxide-Semiconductor-Field-Transistor (MOSFET) with direct power control based on space vector PWM (DPC-SVM) is adopted in the front-end PWM rectifier to achieve high power factor as well as reduce system cost, and full-bridge (FB) converter with phase-shifted zero-voltage zero-current-switching (ZVZCS) is applied to the back-end DC/DC converter to improve system efficiency. Decoupling control for instantaneous active and reactive powers of the grid is realized. Experimental results in 8kW prototype show that during the whole charging process, the system efficiency is higher than 85.1% and the input power factor is higher than 99.9%.
12 citations
Patent•
16 Dec 2015
TL;DR: In this paper, a three-phase bridge PWM rectifier switching tube open-circuit fault diagnosis method is proposed, and the method uses the characteristic that a fault phase grid-side current occurs to be a zero region when an opencircuit defect happens to any one of the switching tubes in a 3-phase AC/DC converter, and fault detection and positioning are achieved according to the variation amount of the current phase angle and a power grid phase angle.
Abstract: The invention discloses a three-phase bridge PWM rectifier switching tube open-circuit fault diagnosis method, and belongs to the field of a three-phase AC/DC converter. The invention aims to solve the problems of inaccurate, poor robustness and the like in multi-tube fault diagnosis in an existing diagnostic scheme. The method uses the characteristic that a fault phase grid-side current occurs to be a zero region when an open-circuit fault happens to any one of switching tubes in a three-phase bridge PWM rectifier, a current phase angle is extracted from a three-phase grid-side current, and fault detection and positioning are achieved according to the variation amount of the current phase angle and a power grid phase angle. The method disclosed by the invention can achieve effective diagnosis of open-circuit faults of both a single switching tube and a plurality of switching tubes in the three-phase bridge PWM rectifier, the software algorithm is simple, no additional hardware circuit is required, and the transient state of a system is highly robust.
12 citations
TL;DR: In this article, a control strategy for a stand-alone induction generator (IG) driven by a variable speed wind turbine for use in remote area power supply is presented, where the generator is excited simultaneously by a capacitor bank and a PWM rectifier.
12 citations