Digital Control Strategy for Single-phase Voltage-Doubler Boost Rectifiers

Cho, Younghoon; Mok, Hyung-Soo; Ji, Jun-Keun; Lai, Jih‐Sheng

doi:10.6113/jpe.2012.12.4.623

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…To optimize the PI controller gains of a sampled data system in the continuous time domain, it is necessary to determine an equivalent continuous time model that considers the delay time (T d ) produced by the sampling process and the algorithm computation time [18], [19]. The design objective in such an exercise is to maximizes the controller gains (K p and K i ) with the desired phase margin (ϕ m ) while the forward path open loop gain tracks through unity [20].…”

Section: Stability Analysis and Determination Of The Pi Controllmentioning

confidence: 99%

Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors

Jassim¹,

Zahawi²,

Atkinson³

2015

Journal of Power Electronics

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This paper presents a new current sharing control strategy for parallel-connected, synchronised three-phase DC-AC converters employing space vector pulse width modulation (SVPWM) without current sharing reactors. Unlike conventional control methods, the proposed method breaks the paths of the circulating current by dividing the switching cycle evenly between parallel connected equally rated converters. Accordingly, any inter-module reactors or circulating current control will be redundant, leading to reductions in system costs, size, and control algorithm complexity. Each converter in the new scheme employs a synchronous dq current regulator that uses only local information to attain a desired converter current. A stability analysis of the current controller is included together with a simulation of the converter and load current waveforms. Experimental results from a 2.5kVA test rig are included to verify the proposed control method.

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Section: Stability Analysis and Determination Of The Pi Controllmentioning

confidence: 99%

Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors

Jassim¹,

Zahawi²,

Atkinson³

2015

Journal of Power Electronics

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“…1(a) [1]- [7]. However, its conduction losses are large because its power current flow paths always include three main power semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Analysis, Design, and Implementation of a High-Performance Rectifier

Wang¹,

Tao²,

Lai³

2016

Journal of Power Electronics

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A high-performance rectifier is introduced in this study. The proposed rectifier combines the conventional pulse width modulation, soft commutation, and instantaneously average line current control techniques to promote circuit performance. The voltage stresses of the main switches in the rectifier are lower than those in conventional rectifier topologies. Moreover, conduction losses of switches in the rectifier are certainly lower than those in conventional rectifier topologies because the power current flow path when the main switches are turned on includes two main power semiconductors and the power current flow path when the main switches are turned off includes one main power semiconductor. The rectifier also adopts a ZCS-PWM auxiliary circuit to derive the ZCS function for power semiconductors. Thus, the problem of switching losses and EMI can be improved. In the control strategy, the controller uses the average current control mode to achieve fixed-frequency current control with stability and low distortion. A prototype has been implemented in the laboratory to verify circuit theory.

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“…In this paper, the individual phase current controllers with the reconstructed phase currents ˆa i , ˆb i , and ˆc i are adopted for balancing each phase. The modified type 3 controller design method proposed in [21] is applied for current control.…”

Section: Type 3 Current Controller Designmentioning

confidence: 99%

A Phase Current Reconstruction Technique Using a Single Current Sensor for Interleaved Three-phase Bidirectional Converters

Lee¹,

Cho²,

Choe³

2016

Journal of Electrical Engineering and Technology

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Abstract-This paper proposes a new phase current reconstruction technique for interleaved threephase bidirectional dc-dc converters using a single current sensor. In the proposed current reconstruction algorithm, a single current sensor is employed at the dc-link, and the dc-link current information is sampled at either the peak or valley point of the pulse-width modulation (PWM) carriers regularly. From the obtained current information, all phase currents are reconstructed in a single PWM cycle. After that, the digital current controller is applied to achieve current balancing in each phase. Compare to the previous multiple current sensor method, the proposed strategy reduces the number of the current sensors in the interleaved three-phase bidirectional converter as well as reducing potential current sensing error caused by non-ideal characteristics of the multiple current sensors. The effectiveness of the proposed method is verified from the experiments based on a 3kW three-phase bidirectional converter prototype for the automotive battery charging application.

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Digital Control Strategy for Single-phase Voltage-Doubler Boost Rectifiers

Cited by 5 publications

References 27 publications

Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors

Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors

Analysis, Design, and Implementation of a High-Performance Rectifier

A Phase Current Reconstruction Technique Using a Single Current Sensor for Interleaved Three-phase Bidirectional Converters

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