The circulating current in paralleled three-phase boost PFC rectifiers

Xing, Kun; Mazumder, Sudip K.; Ye, Z.; Lee, F.C.; Borojevic, D.

doi:10.1109/pesc.1998.701988

Cited by 28 publications

(35 citation statements)

References 6 publications

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“…Therefore, their utilization has dramatically increased in various applications including uninterruptible power supplies (UPS), motor drives, and power factor correction (PFC) equipment [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Modeling of Parallel Three-Phase Boost Converters Using Three-Phase Coupled Inductor

Lim

Lee²,

Kim³

et al. 2013

Journal of Electrical Engineering and Technology

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-The main issue of parallel three-phase boost converters is reduction of the low-and high frequency circulating currents. Most present technologies concentrate on low frequency circulating current because the circulating current controller cannot mitigate the high frequency circulating current. In this paper, analytical approach of three-phase coupled inductor applied to parallel system becomes an important objective to effectively reduce the low-and high frequency circulating currents. The characteristics of three-phase coupled inductor based on a structure and voltage equations are mathematically derived. The modified voltage equations are then applied to parallel three-phase boost converters to develop averaged models in stationary coordinates and rotating coordinates. Based on the averaged modeling approach, design of the circulating current controller is presented. Simulation and experimental results demonstrate the effectiveness of the analysis and modeling for the parallel threephase boost converters using three-phase coupled inductor.

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Section: Introductionmentioning

confidence: 99%

Analysis and Modeling of Parallel Three-Phase Boost Converters Using Three-Phase Coupled Inductor

Lim

Lee²,

Kim³

et al. 2013

Journal of Electrical Engineering and Technology

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“…One common current-sharing approach is to employ an active control scheme to force the currents in all but one module of a parallel dc-dc converter to follow the reference current generated by a dedicated module referred to as the master. Such a scheme, also known as dedicated master-slave control scheme [5], [8], ensures that all of the slave modules follow the reference current of the master. For very low-cost power-electronics applications, an inexpensive version of the master-slave control technique, as shown in Fig.…”

mentioning

confidence: 99%

Wireless PWM Control of a Parallel DC–DC Buck Converter

Mazumder

Tahir

Kamisetty³

2005

IEEE Trans. Power Electron.

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Abstract-We demonstrate a new concept for wireless pulse-width modulation (PWM) control of a parallel dc-dc buck converter. It eliminates the need for multiple physical connections of gating/PWM signals among the distributed converter modules. The new scheme relies on radio-frequency (RF) based communication of the PWM control signals from a master to the slave modules. We analyze the system stability and demonstrate the experimental effectiveness of the wireless control scheme for a two-module parallel buck converter for 10-kHz and 20-kHz switching frequencies and for channel lengths of 1.5 and 15 ft, respectively. The proposed control concept may lead to easier distributed control implementation of parallel dc-dc converters and distributed power systems, and may lead to redundancy that is achievable using droop method. It may also be used as a backup for wire-based control of parallel converters to provide fault tolerance.Index Terms-Buck converter, master-slave control, parallel dc-dc converters, radio frequency, wireless.

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“…A multi-phase pulse-width modulation (PWM) rectifier, which operates under unity-power-factor condition and regulates the bus voltage, is a viable option for an individual module of such a parallel-converter system. One such system is shown in Figure 1, which has two modules and three phases [7][8][9]. All of the discussion in this paper is based on this system.…”

Section: Introductionmentioning

confidence: 99%

“…Such a controller usually controls the currents on the dq axes only because the zero-axis current is negligible for the balanced system. However, when two three-phase PWM modules are directly connected, circulating currents can exist in all of the phases [7,8]. However, the zero-axis current is not reflected on the dq axes and hence a synchronous-frame controller (in the dq axes) has no effect on the zero-axis current.…”

Section: Introductionmentioning

confidence: 99%

“…There are several methods proposed to reduce the cross-current between the modules [1,2,13,14]. Using a linear controller and space-vector modulation (SVM) schemes, which do not use the zero vectors, Xing et al [7,8] have developed schemes for standardized three-phase modules to reduce the cross-current. The advantage of such schemes is that the communication between the modules is minimal.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of nonlinear and linear control schemes for independent stabilization of parallel multi-phase converters

Mazumder

Nayfeh²,

Boroyevich³

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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Using a parallel three-phase boost converter consisting of two modules, we compare the performances of three recently proposed nonlinear control schemes. The basic idea, however, can be extended to a system with N modules and other multi-phase converters. All of the control schemes are developed in a synchronous frame and each of the closed-loop power-converter modules operates asynchronously without any communication with the other module. The control schemes stabilize the currents on the dq axes and limit the zero-axis disturbance by preventing the flow of the pure-zero sequence current. One of the control schemes is developed purely in the discrete domain. It combines the space-vector modulation scheme with a variable-structure control, thereby keeping the switching frequency constant and achieving satisfactory dynamic performance. The performances of the other control schemes are also satisfactory.

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The circulating current in paralleled three-phase boost PFC rectifiers

Cited by 28 publications

References 6 publications

Analysis and Modeling of Parallel Three-Phase Boost Converters Using Three-Phase Coupled Inductor

Analysis and Modeling of Parallel Three-Phase Boost Converters Using Three-Phase Coupled Inductor

Wireless PWM Control of a Parallel DC–DC Buck Converter

Comparison of nonlinear and linear control schemes for independent stabilization of parallel multi-phase converters

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