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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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Proceedings ArticleDOI
17 Jun 2001
TL;DR: A method of generating gate signals of the PWM rectifier section of the converter without DC link components, which is able to remove snubber circuits is described, and it is concluded that it decreases losses in the rectifiers.
Abstract: In this paper, we describe a method of generating gate signals of the PWM rectifier section of the converter without DC link components, which is able to remove snubber circuits In the snubber circuits, losses have been dissipated every time the switches of the rectifier section are turned on and off The commutation strategy of the proposed method consists of four steps during the switching process The proposed method is verified by experimental tests on an induction motor drive It is concluded that it decreases losses in the rectifier section

43 citations

Journal ArticleDOI
Hui Li1, Mingyao Lin1, Ming Yin1, Jian Ai1, Wei Le1 
TL;DR: A novel control scheme based on an optimal application of three voltage vectors in a symmetrical way, which takes advantage of advanced PWM techniques and the virtual flux-based control scheme is introduced to achieve voltage sensorless control.
Abstract: A voltage sensorless control of low-complexity model predictive direct power control (LC-MPDPC) for pulsewidth modulation (PWM) rectifier is proposed. The conventional LC-MPDPC adopts one or two voltage vectors during one control period, which achieve good steady-state performance and quick dynamic response. In addition, based on the mathematical model of the real system, the conventional method only requires one prediction to find the optimal voltage vector, which reduces the control complexity and computational burden. However, the use of one or two vectors during one sampling interval presents abundant current harmonics and high power ripples, and the switching frequency is variable. In order to solve these problems while preserving all the advantages of the conventional LC-MPDPC, this paper presents a novel control scheme, with the aim of operating at a constant switching frequency and obtaining an excellent steady-state performance at a low switching frequency. The proposed method is based on an optimal application of three voltage vectors in a symmetrical way, which takes advantage of advanced PWM techniques. Furthermore, the virtual flux-based control scheme is introduced to achieve voltage sensorless control. The proposed strategy is compared with the conventional MPDPC methods and its effectiveness is confirmed by both simulation and experimental results from a three-phase PWM rectifier under 1000-W operation condition.

43 citations

Journal ArticleDOI
TL;DR: In this paper, switching cycle average modeling and the carrier-based modulation strategy for this rectifier are also presented to maintain a balanced dc link and to regulate flying capacitor voltages, while achieving unity displacement factor at the rectifier input terminals.
Abstract: Nonregenerative pulsewidth-modulated (PWM) rectifiers are increasingly being considered for applications, where the power flow is unidirectional, such as power supplies for telecommunications, X-ray, the machine-side converter for wind energy conversion systems, etc. They use fewer active switches, which increase their power density and reduce cost. This paper proposes a novel reduced switch topology for a multilevel (five-level or higher) nonregenerative PWM rectifier. It uses only four controlled switches and eight diodes per phase for a five-level rectifier. Half of the diodes are naturally commutated (zero current switching) at the line frequency, which reduces switching losses. This topology has several other advantages compared to similar topologies reported in the literature, such as minimum voltage stress across the devices, elimination of transient voltage-balancing snubbers, no extra hardware for balancing the flying capacitors, the dc-link mid-point voltage, etc. In this paper, switching cycle average modeling and the carrier-based modulation strategy for this rectifier are also presented to maintain a balanced dc link and to regulate flying capacitor voltages, while achieving unity displacement factor at the rectifier input terminals. The overall performance of the rectifier is verified by experimental results.

43 citations

Journal ArticleDOI
TL;DR: An LLC type converter with two interleaved pulsewidth modulation (PWM) rectifiers is proposed, which achieves a wide voltage regulation range independent of load and is a good option for medium/high power wide output range applications.
Abstract: In this paper, an LLC type converter with two interleaved pulsewidth modulation (PWM) rectifiers is proposed. Compared with the conventional LLC converter, it achieves a wide voltage regulation range independent of load. In the proposed structure, each secondary-side PWM rectifier can operate individually. With the interleaving technique and shared primary-side switching network, the circuit secondary-side current stress is halved and the primary-side current stress is largely reduced. Besides, the filter capacitor requirement is reduced. Therefore, the proposed structure is a good option for medium/high power wide output range applications. The symmetrical LLC resonant tanks always operate at the resonant frequency, which marks the optimal operation point of the LLC resonant tank. Therefore, the conduction loss is effectively mitigated. In the proposed converter, zero-voltage turning- on (ZVS) of the primary-side MOSFETs can be ensured and is independent of the load. Moreover, the turning- off currents of the primary-side MOSFETs are small and are also load independent. This brings the benefits of minimized circulating current and negligible turning- off loss and no MOSFET turning- off voltage spike. The secondary-side auxiliary MOSFETs turn- on with ZVS and rectifying diodes turn- off with limited di / dt. Topological analysis and experimental results of a 1.3 kW/100 kHz prototype generating 230–440 V output from 390-V input are presented. The prototype demonstrates 97.31% peak efficiency and good performance over a wide output range.

43 citations

Journal ArticleDOI
TL;DR: A simple yet novel load adaptive ZVS auxiliary circuit for three-level converter is proposed for so that the resulting three-phase ac-dc converter can meet energy star platinum efficiency standard.
Abstract: Three-level PWM dc–dc converters convert high dc voltage (>500 V) generally at the output of a three-phase ac–dc PWM rectifier in ac–dc converters to an isolated dc output voltage which can be used to power data center loads Strict efficiency requirements at loads from 20% to 50% of full load of ac–dc converters for telecom applications have been introduced by energy star enforcing industries to improve efficiency of the dc–dc converter in an ac–dc converter powering data-center loads at those loads High-efficiency requirements at low and mid loads in high switching frequency PWM dc–dc three-level converters implemented with MOSFETs can be achieved by reducing switching losses through optimized load adaptive ZVS for the entire load range In this paper, a simple yet novel load adaptive ZVS auxiliary circuit for three-level converter is proposed for so that the resulting three-phase ac–dc converter can meet energy star platinum efficiency standard The operation of the proposed dc–dc converter is described, analyzed, and validated by experimental results from an industrial prototype of a three-phase ac–dc converter comprising of a front-end three-phase boost PWM rectifier followed by the proposed converter

43 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202326
202267
202145
202095
2019133
2018112