Capacitor Voltage-Balancing Techniques for a Multipulse Rectifier With Active Injection

Araujo-Vargas, Ismael; Forsyth, A.J.; Chivite-Zabalza, F.J.

doi:10.1109/tia.2010.2091475

Cited by 39 publications

(12 citation statements)

References 17 publications

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“…Several schemes have been presented to study and analyse the voltage balance issue in multilevel converters [15][16][17][18][19][20][21][22]. A harmonic elimination approach has been used to balance dc-link voltages in a CHB multilevel rectifier [15].…”

Section: Introductionmentioning

confidence: 99%

A Redundancy‐based scheme for balancing DC‐link voltages in cascaded H‐bridge rectifiers

Keshavarzian

Iman‐Eini

2013

IET Power Electronics

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A new voltage balancing algorithm is introduced for cascaded H-bridge rectifiers. This kind of converter is made of a series connection of H-bridge cells with separate dc-links. The proposed balancing algorithm will regulate the voltage of all dclinks to the desired reference value, even if the attached loads are very different. The input current is also programmed to be sinusoidal and has low distortion, while the switching frequency is kept low at 1 kHz. In addition, the input power factor can be controlled. The simulation and experimental results are presented to confirm the validity of the proposed algorithm.

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Section: Introductionmentioning

confidence: 99%

A Redundancy‐based scheme for balancing DC‐link voltages in cascaded H‐bridge rectifiers

Keshavarzian

Iman‐Eini

2013

IET Power Electronics

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“…The rectifier converts ac supply to dc, which is then filtered and fed to a modified multiport converter (MPC).This MPC has a cascaded combination of zeta and a buck converter, that supplies dc load of two different power ratings. Power factor correction is done using zero voltage switching, in an isolated AC-DC converter [1] [5].Current injection method is employed to remove the ripples in tha ac supply. The output voltage ripple helps to generate these current injection pulses, in rectangular form [2].…”

Section: Introductionmentioning

confidence: 99%

Implementation of a low cost ac-dc converter for high and low power applications

Ilambirai¹,

Dash²,

Rayaguru³

2017

IJET

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This paper proposes an ac-dc converter that gives multiple outputs capable of feeding both high and low power applications. The input ac supply is converted to dc by a diode bridge rectifier, filtered and fed to a modified multiport converter (MPC). This paper focuses on the design of the modified multiport converter that has a cascaded combination of zeta and a buck converter. This is designed as a single input and multiple output converter (SIMO) structure which can operate two loads, one with a high power and other with a low power application, depending on the time instant. The need for opting a multiport converter, reduces the number of switches utilized, thereby reducing the switching losses in the circuit. The zeta in the MPC boosts the input voltage and the buck converter reduces the input voltage and is accordingly fed to the need of the load. The design of the components have been analysed through steady state. MATLAB Simulink has been used to simulate the converter circuit and the varied outputs of the zeta and buck modes are compared. A hardware prototype of the ac-dc converter has been implemented and their results have been shown.

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“…In general, there are two common topologies of the large current rectifier [2]. One is the multi-pulse rectifier [4][5][6][7][8][9][10][11][12][13][14][15]. According to the difference of phase-shift transformer, the multi-pulse rectifiers can be classified into two types [4].…”

Section: Introductionmentioning

confidence: 99%

“…According to the difference of phase-shift transformer, the multi-pulse rectifiers can be classified into two types [4]. One uses the isolated transformer [5][6][7][8][9], and another uses the autotransformer [10][11][12][13][14][15]. Another topology of large current rectifier is the double-star rectifier, which uses the double star isolated transformer to be the phase-shift transformer [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of star‐connected autotransformer applied to large current rectifier

Meng

Liu

Gao

et al. 2017

IET Electric Power Applications

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To improve the power density of large current rectifier, this study designs optimally a star-connected autotransformer which is used in large current rectifier. From the viewpoint of minimising the kVA rating of phase-shift transformer and conduction loss of rectification devices, it is concluded that the ideal large current rectifier is a combination of dual three-phase half-wave rectifiers and a star-connected autotransformer which is used to be the phase-shift transformer. To design optimally the star-connected autotransformer, the winding configurations of the star-connected autotransformer are analysed, and the corresponding expressions and waveforms of current through windings at different winding configurations are also obtained. Consequently, the kVA rating expressions of the autotransformer under different winding configurations are calculated, which describe the relationship between the winding configuration and load power. From the expressions, the optimal winding configuration, which has the least kVA rating and winding numbers, is obtained. Some simulations and experiments are carried out to verify the theoretical analysis.

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Capacitor Voltage-Balancing Techniques for a Multipulse Rectifier With Active Injection

Cited by 39 publications

References 17 publications

A Redundancy‐based scheme for balancing DC‐link voltages in cascaded H‐bridge rectifiers

A Redundancy‐based scheme for balancing DC‐link voltages in cascaded H‐bridge rectifiers

Implementation of a low cost ac-dc converter for high and low power applications

Optimal design of star‐connected autotransformer applied to large current rectifier

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