PWM rectifier

About: PWM rectifier is a research topic. Over the lifetime, 2254 publications have been published within this topic receiving 25614 citations.

Fast detection control for fault-tolerant converter back-to-back with redundancy leg supplying an induction motor drives

Abstract: The purpose of this paper is the study of fault tolerant control with pulse large modulation (PWM) AC-DC-AC converter for supplying a three-phase rotor field oriented induction motor. The back to back converter is supplied with three-phase network and composed of a PWM rectifier and a voltage source inverter. Fault tolerant topology of AC-DC-AC converter with redundancy have been studied and associated with affective and fast method of fault detection and compensation to guarantee the continuity of service, in the presence of an open circuit failure possibility on the level of one of their legs. Although of the presence of open circuit on the level of the converter legs, the obtained simulation results show that the proposed method has the ability to maintain the good performance of the drive.

Single-phase voltage-doubler SEPIC rectifier with high power factor

Abstract: This paper introduces a single-phase PWM rectifier topology based on a discontinuous conduction mode (DCM) SEPIC converter. The structure integrates two SEPIC rectifiers, which work as half-wave rectifiers, one for each half-line cycle, in a unique converter, and the novel rectifier is designed as voltage-doubler SEPIC rectifier. A comparison with the classic SEPIC rectifier shows that the proposed converter might either provide reduced voltage stress on the semiconductors to the same output voltage level, or it might supply double the gain in the output voltage with the same voltage stress. This structure provides high power factor with no current control, as a classical DCM SEPIC rectifier. As a result, the proposed rectifier can be applied in order to improve the static gain of the DCM SEPIC rectifier and thus make it suitable for applications that demand high voltage level. The topology and theoretical analysis are presented in the paper and they were verified by experimental results, which were obtained in a prototype with the following specification: 1000W output power; 220V input voltage; 400V output voltage and 50 kHz switching frequency.

A control strategy of single phase voltage source PWM rectifier under rotating coordinate

Abstract: Feed forward decoupling control under Rotating coordinate can suppress the static error of single-phase PWM rectifier's current. But due to the variation inductance in the actual situation, the performance of control will be poor. The feedforward decoupling control method without inductance value is adopted in this paper to solve the problem that the inductance value is not accurate. Simulink simulation results show that the control method can be completed when the L value is not accurate.

Modelling and control of a power electronic cascade for the multi‐DC bus supply

Abstract: Purpose – The purpose of this paper is to describe the control and regulation of input DC voltages of nine‐level neutral point clamping (NPC) voltage source inverter (VSI).Design/methodology/approach – The analysis and simulation of a cascade made up of three‐phase five‐level PWM rectifier‐nine levels NPC VSI are treated. This cascade is used to feed a permanent magnet synchronous machine (PMSM) drive. First, the five‐level PWM rectifier is presented. Then a topology of nine‐level NPC VSI and the associated PWM control strategy are described. In order to discard the problem of DC link voltage fluctuations, a clamping bridge with a PI regulation has been added to the cascade. Then a field‐oriented control strategy has been implemented in the PMSM.Findings – The obtained results are full of promise to use the inverter in high voltage and great power applications such as electric naval propulsion systems.Originality/value – The application of the proposed feedback control algorithm to the studied cascade off...

A soft switching three-phase three-switch buck rectifier

Abstract: In this paper a novel soft switching three-phase pulse width modulation (PWM) rectifier is proposed. Various switching state sequences of a three-phase three-switch buck-type unity power factor rectifier are reviewed and the operation modes of the converter are explained and analyzed. The converter operates under zero current switching (ZCS) condition. By using an auxiliary circuit with a simple method of energy recovery, the current is diverted away from the main power switches before they are to be turned off; so, switching losses in the converter are reduced. The auxiliary circuit consists of two auxiliary switches and a resonant inductance-capacitance circuit connected to the auxiliary switches. The proper operation of the converter is confirmed by the results obtained from the digital simulations.