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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.


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Patent
05 Mar 1998
TL;DR: In this paper, a power factor improving circuit for reducing a harmonic current component contained in an AC input current and for achieving an excellent power factor and efficiency in a circuit having a rectifier circuit, provided between an input terminal of the charging half-bridge rectifier and a connecting point of two transistors of the halfbridge-type inverter.
Abstract: A power factor improving circuit for reducing a harmonic current component contained in an AC input current and for achieving an excellent power factor and efficiency in a circuit having a rectifier circuit, provided between a rectifier circuit and a half-bridge-type inverter, including a discharging diode and a smoothing capacitor connected in series to each other and in parallel between output terminals of the rectifier circuit, a charging half-bridge rectifier connected to the smoothing capacitor, and a high-frequency capacitor and high-frequency inductor connected in series to each other and between an input terminal of the charging half-bridge rectifier and a connecting point of two transistors of the half-bridge-type inverter.

24 citations

Proceedings ArticleDOI
18 May 1993
TL;DR: A comparative analysis of the p-i-n, SSD (static shielding diode), soft and fast recovery diode, SPEED (self-adapting P-emitter efficiency diode) and MPS (merged P-N Schottky) rectifiers is performed using the two-dimensional numerical simulator MEDICI.
Abstract: A comparative analysis of the p-i-n, SSD (static shielding diode), SFD (soft and fast recovery diode), SPEED (self-adapting P-emitter efficiency diode), and MPS (merged P-N Schottky) rectifiers is performed using the two-dimensional numerical simulator MEDICI. Identical drift region properties are used to obtain the forward I-V, reverse I-V, and reverse recovery characteristics. The MPS, SSD, and SFD rectifiers are found to exhibit a much smaller stored charge and a shorter reverse recovery time than the other rectifiers. As the dose and depth of the shallow P-region implant is increased, the SSD rectifier characteristics are found to shift from those of the MOS rectifier to those of the p-i-n rectifier. It is concluded that the tradeoff between stored charge, leakage current, reverse recovery time, and forward voltage drop is best for the MPS and SSD rectifiers. These rectifiers also exhibit improved soft recovery during switching. >

24 citations

Patent
28 Jan 1976
TL;DR: In this paper, a three-phase rectifier circuit is connected to provide a d-c output voltage as a function of the 3-phase energy passed to the rectifier, which is reduced in amplitude over a voltage divider circuit and passed through an optically-coupled detector circuit.
Abstract: A three-phase rectifier circuit is connected to provide a d-c output voltage as a function of the three-phase energy passed to the rectifier circuit. This energy is reduced in amplitude over a voltage divider circuit and passed through an optically-coupled detector circuit to provide a control signal indicating the presence of energy on all phase conductors of the supply line. If a fuse blows in one line, or if the power on that line is interrupted for any reason, the ripple content of the rectified voltage increases. This is sensed by a detector circuit to energize an alarm and/or interrupt the main power bus to the load.

24 citations

Patent
03 Mar 1994
TL;DR: In this paper, a R-C relaxation oscillator having two comparators and a silicon controlled rectifier dissipates very low average power without resulting in frequency instabilities due to circuit propagation delays.
Abstract: An R-C relaxation oscillator having two comparators and a silicon controlled rectifier dissipates very low average power without resulting in frequency instabilities due to circuit propagation delays. A timing capacitor CT is charged through a timing resistor RT. The first comparator compares the voltage across the timing capacitor with an upper threshold voltage VTH. When the voltage across the timing capacitor crosses the upper threshold voltage, the comparator turns on the silicon controlled rectifier, which causes the capacitor to discharge the voltage that it has stored. The second comparator turns off the silicon controlled rectifier when the voltage across the timing capacitor falls below a lower threshold voltage VTL. The silicon controlled rectifier also provides boosted comparator bias current during the discharge phase, enabling the second comparator to respond quickly to the lower threshold voltage crossing and allowing fast capacitor discharge (therefore narrow clock pulses) and increasing frequency stability.

24 citations

Proceedings ArticleDOI
28 May 2012
TL;DR: In this article, an analysis on suitable topologies for the generator-side converter (rectifier) of the back-to-back converter arrangement is presented, where the two most popular rectifier systems, namely, the passive diode bridge rectifier and the active six-switch two-level rectifier are taken as two extremes to evaluate other topologies presented in this paper.
Abstract: The drive towards high efficiency wind energy conversion systems has resulted in almost all the modern wind turbines to operate in the variable speed mode which inevitably requires back-to-back power electronic converters to decouple generator dynamics from the grid. The aim of this paper is to present an analysis on suitable topologies for the generator-side converter (rectifier) of the back-to-back converter arrangement. Performance of the two most popular rectifier systems, namely, the passive diode bridge rectifier and the active six-switch two-level rectifier are taken as two extremes to evaluate other topologies presented in this paper. The other rectifier systems considered in this study include combinations of a diode bridge rectifier and electronic reactance(s), a combination of a rectifier and a dc-dc converter and a half controlled rectifier. Diode-clamped and capacitor-clamped three-level active rectifier topologies and their possible switch reductions are also discussed in relation to the requirements of modern high power wind energy conversion systems (WECSs). Simulation results are presented to support conclusion derived from this analysis.

24 citations


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