Topic
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 published on a yearly basis
Papers
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11 Feb 1999TL;DR: In this article, an active snubber inductor is inserted in series with the boost switch and the boost rectifier, so as to control the rate of change (di/dt) of the rectifier current during rectifier's turnoff.
Abstract: A boost converter includes a novel active snubber which reduces losses caused by the reverse-recovery characteristic of the boost rectifier. The active snubber includes a snubber inductor, a ground-referenced referenced auxiliary switch, and a snubber rectifier. The losses are reduced by inserting the snubber inductor in series with the boost switch and the boost rectifier, so as to control the rate of change (di/dt) of the boost rectifier current during the rectifier's turn-off. A proper operation of the proposed circuit requires overlapping gate drives of the main and the auxiliary switches. The component voltage and current stresses in the proposed circuit are similar to those in the conventional, "hard-switched" boost converter.
23 citations
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07 Apr 1987TL;DR: In this paper, a series circuit is connected in parallel with the first diode arrangement and comprises a second diode, via which only the chage current of the capacitor flows, and at least a parallel arrangement of a control circuit (9) and a smoothing capacitor (7).
Abstract: A circuit arrangement for generating a direct voltage from a sinusoidal input voltage. A capacitor (2) is coupled to an output terminal (3) of a rectifier (1) which receiver the input voltage and is discharged via a first diode arrangement (5) and a load (10) which is connected to the output of the rectifier (1). A series circuit is connected in parallel with the first diode arrangement (5) and comprises a second diode arrangement (4), via which only the chage current of the capacitor (2) flows, and at least a parallel arrangement of a control circuit (9) and a smoothing capacitor (7).
23 citations
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TL;DR: In this article, a three-phase motor drive system supplied with a single-phase AC-DC diode rectifier is investigated in order to reduce shaft voltage in a threephase AC motor drive systems.
Abstract: Common-mode voltage generated by a power converter in combination with parasitic capacitive couplings is a potential source of shaft voltage in an AC motor drive system. In this study, a three-phase motor drive system supplied with a single-phase AC-DC diode rectifier is investigated in order to reduce shaft voltage in a three-phase AC motor drive system. In this topology, the AC-DC diode rectifier influences the common-mode voltage generated by the inverter because the placement of the neutral point is changing in different rectifier circuit states. A pulse width modulation technique is presented by a proper placement of the zero vectors to reduce the common-mode voltage level, which leads to a cost-effective shaft voltage reduction technique without load current distortion, while keeping the switching frequency constant. Analysis, simulations and experimental implementation have been presented to investigate the proposed method.
23 citations
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13 Oct 1987
TL;DR: In this article, a non-current compensated choke having an inductance of at least 50 mH is connected in series between the rectifier output terminals and the rectifiers system terminals, an oscillation start acceleration circuit including a CR circuit, and a pair of symmetry resistors (R6,R7) are connected in parallel to symmetry defining capacitors.
Abstract: To permit dimming of a halogen incandescant lamp, or set of lamps connected to an electronic transformer circuit which receives operating voltage from a power network, rectifies the current supply and chops the rectified power to provide high-frequency alternating voltage for transformation to low voltage of the incandesent lamp, a non-current compensated choke having an inductance of at least 50 mH is connected in series between the rectifier output terminals and the rectifier system terminals, an oscillation start acceleration circuit including a CR circuit is connected in parallel with the starting circuit for the alternately operating transistors and a pair of symmetry resistors (R6,R7) are connected in parallel to symmetry defining capacitors (C6,C7), connected across the rectifier output terminals and a mid-point (M) of the oscillation transistors. The arrangement permits soft starting of the transistors, even if a serially connected phase controlled dimmer circuit suddenly connects line voltage at peak value across the rectifier, while providing for continuous energy release, even if the dimmer control is turned beyond the 90° phase angle position and, for example, to 135° phase angle.
23 citations
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06 Mar 2005TL;DR: In this paper, the diode conduction problem is explained and a solution based on a variation of the same topology is presented. But it is not shown that the solution offers the possibility of high-voltage bulk energy storage.
Abstract: The performance of a conventional isolated SEPIC rectifier can be improved with an active voltage clamp. Relatively high efficiency and low total harmonic distortion (THD) can be achieved with an active-clamped SEPIC rectifier in high-line-frequency (360-800 Hz) avionics applications. However, it is observed that a diode conduction problem affects the rectifier efficiency as the line frequency increases. This paper explains the diode conduction problem and presents a solution that is based on a variation of the same topology. An efficiency of 90% has been achieved for a power level of 100 W over the entire line frequency range. Additionally, the solution offers the possibility of high-voltage bulk energy storage
23 citations