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.

State-space average modelling of 6- and 12-pulse diode rectifiers

Abstract: This paper derives averaged-value models for 6- and 12- pulse transformer-diode rectifier units and validates their utilities by comparison of the resultant transient and steady state behaviors with those obtained from extensive simulations of detailed 6- and 12-pulse diode rectifier models It is shown that the averaged-value models capture the key features of the dynamic characteristics of the rectifiers, while being time invariant and computationally efficient The developed models can, therefore, be used for stability assessment of electric power systems with the diode rectifiers, multiple power electronic converter-controlled loads and electrical drives

A New Critical Formula and Mathematical Model of Double-Tap Interphase Reactor in a Six-Phase Tap-Changer Diode Rectifier

Abstract: This paper presents a new practical formula to calculate the critical value of interphase reactor (IPR) in a six-phase diode rectifier with tap-changer. In addition, a mathematical model of the double-tap IPR has been established by equivalent circuit method. Simulation and experimental results verify the validity of the formula and mathematical model. On the basis of the above achievements, a simple and effective approach is provided to design the IPR and to analyze the performance of the whole system

Comparison of Tolerance Controls for Open-Switch Fault in a Grid-Connected T-Type Rectifier

Abstract: Multilevel rectifier topologies are commonly used in wide-power range applications. The T-type rectifier topology, which is a three-level topology, has an advantage in terms of efficiency compared to a neutral-point clamped (NPC)-type topology. In applications using the T-type rectifier topology, improving reliability has gained increased attention recently. A tolerance control for T-type rectifiers is necessary to improve the reliability of applications. When an open fault of switches connected to the neutral-point occurs, the NPC-type rectifier cannot restore distorted input currents, on the other hand, the T-type rectifier can eliminate the input current distortion completely. In this paper, we report two studies: 1) a three-level switching-oriented tolerance control, which is advantageous in terms of efficiency, for the Sx2 and Sx3 open-switch faults of the T-type rectifier and 2) comparison of the proposed tolerance control with two existing tolerance controls. In particular, the current total harmonic distortion, dc-link voltage ripple, and switch losses of these tolerance controls are analyzed by using simulation and experimental results.

Current-mode rectifier with improved precision

Abstract: A modified bridge bias arrangement is described for a precision current-mode rectifier that avoids the adjustment sensitivity of a previously reported scheme by directly defining diode bias current. In addition, an analysis of current-mode bridge rectification is presented, along with performance enhancements due to the introduction of a current summing output stage.