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Precision rectifier

About: Precision rectifier is a research topic. Over the lifetime, 4952 publications have been published within this topic receiving 63668 citations. The topic is also known as: super diode.


Papers
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Proceedings ArticleDOI
01 Nov 2010
TL;DR: In this article, a novel control strategy for cascaded H-bridge based multilevel rectifiers (CHBBR) to operate under unbalanced load and dc-bus voltage conditions is presented.
Abstract: This paper presents a novel control strategy for cascaded H-bridge based multilevel rectifiers (CHBBR) to operate under unbalanced load and dc-bus voltage conditions. The proposed control strategy exploits the power factor as a degree of freedom to stabilize the rectifier operation. The controller is designed for single-phase seven-level rectifiers and its main feature is that it allows the multilevel rectifier to operate under heavy unbalanced load conditions while absorbing current with low harmonic content. It also eliminates the heavy and bulky line side filter and transformer in addition to extra dc-dc converters needed to obtain different voltage levels. Performance of cascaded H-bridge multilevel rectifier and the corresponding controllers are evaluated based on digital time-domain simulation studies in the PSCAD/EMTDC environment. The studies demonstrate the capability of the proposed control strategy to maintain the stability of the rectifier under unbalanced load conditions.

18 citations

Patent
04 Oct 2013
TL;DR: In this article, a system for filtering electromagnetic interference (EMI) includes a power source 12 that provides alternating current (AC) power; a load; an active rectifier 16 that converts AC power from the power source to direct current (DC) power for the load; and a filter consisting at least one notch filter 40a, b that filters selected frequencies of EMI generated by the active rectifiers.
Abstract: A system for filtering electromagnetic interference (EMI) includes a power source 12 that provides alternating current (AC) power; a load; an active rectifier 16 that converts AC power from the power source to direct current (DC) power for the load; and a filter 14 connected between the power source and the active rectifier, wherein the filter comprises at least one notch filter 40a, b that filters selected frequencies of EMI generated by the active rectifier.

18 citations

Patent
27 Jan 2001
TL;DR: In this paper, a method for preventing a fault condition in a DC-DC converter (10, 20, 50) having a first secondary winding (Ns1) coupled to a first synchronous rectifier (SQ1) and a second secondary winding(Ns2) coupling to a second synchronized rectifier(SQ2) was proposed.
Abstract: The present invention provides a method for preventing a fault condition in a DC-DC converter (10, 20, 50) having a first secondary winding (Ns1) coupled to a first synchronous rectifier (SQ1) and a second secondary winding (Ns2) coupled to a second synchronous rectifier (SQ2). The first synchronous rectifier (SQ1) is turned on based on a voltage across the first secondary winding (Ns1) and is turned off based on a first driver signal. The second synchronous rectifier (SQ2) is turned on based on a voltage across the second secondary winding (Ns2) and is turned off based on a second driver signal. The present invention also provides a DC-DC converter (10, 20, 50) wherein a first control circuit is coupled to and controls the first synchronous rectifier (SQ1) pursuant to the method described above, and a second control circuit is coupled to and controls the second synchronous rectifier (SQ2) pursuant to the method described above.

18 citations

Patent
18 Mar 2014
TL;DR: In this paper, a method for controlling a synchronous rectifier for a power converter, a control circuit, and a power converter is presented, which comprises the following steps: turning on a transistor by a rectifier, generating a switching-period signal in accordance with a period of a voltage-sensing signal, and generating a turn-on period of the rectifier; generating a first disabling signal responding to the switching period signal and then generating a second disabling signal in response to the turnon period signal.
Abstract: A method for controlling a synchronous rectifier for a power converter, a control circuit, and a power converter thereof are provided. The method comprises the following steps: turning on a transistor by a rectifier; generating a switching-period signal in accordance with a period of a voltage-sensing signal; generating a turn-on-period signal in accordance with a turned-on period of the rectifier; generating a first disabling signal responding to the switching-period signal; and generating a second disabling signal in response to the turn-on-period signal. The transistor is turned off in response to the first disabling signal and the second disabling signal, and the voltage-sensing signal is related to the switching waveform of a transformer.

18 citations

Proceedings ArticleDOI
01 Nov 2015
TL;DR: In this paper, a component efficient multilevel rectifier is modeled and controlled using Model Predictive Control (MPC) technique, with excellent topology performance which was validated through different simulation scenarios.
Abstract: In this paper, a component efficient multilevel rectifier is modeled and controlled using Model Predictive Control (MPC) technique. The recently introduced Capacitor Tied Switches (CTS) converter structure features two distinct dc-load terminals which can operate at different voltage levels while experiencing high voltage levels at the ac-side terminals. The CTS converter structure inherits attractive features from the efficiency and power quality perspectives, with excellent topology performance which was validated through different simulation scenarios.

18 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202345
202299
20217
202017
201910
201833