Modified Pulse Train Control Based Parallel Connected Buck Converters

In this paper, the Pulse Train (PT) control strategy is tentatively applied to the Parallel-connected Buck Converters (PBC) with current-sharing ability. However, in Continuous Conduction Mode, undesirable low-frequency voltage oscillation will be brought about by the PT control. Therefore, the Capacitor-Current-Feedback based PT (CCF-PT) control is newly proposed to eliminate the low-frequency voltage oscillation. The experimental results indicate that, the proposed CCF-PT control method can successfully achieve effective suppression of low-frequency oscillation by properly configuring the capacitor current feedback coefficient.

[1]  J.-T. Su,et al.  Auto-tuning scheme for improved current sharing of multiphase DC-DC converters , 2012 .

[2]  Mohammad H. Hedayati,et al.  Integrated common-mode inductor design for parallel interleaved converters , 2016 .

[3]  Zhe Chen,et al.  Input-Parallel Output-Parallel Three-Level DC/DC Converters With Interleaving Control Strategy for Minimizing and Balancing Capacitor Ripple Currents , 2017, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[4]  Ming Qin,et al.  Improved Pulse Regulation Control Technique for Switching DC–DC Converters Operating in DCM , 2013, IEEE Transactions on Industrial Electronics.

[5]  Yujin Song,et al.  Digital Current Sharing Method for Parallel Interleaved DC–DC Converters Using Input Ripple Voltage , 2012, IEEE Transactions on Industrial Informatics.

[6]  Jianping Xu,et al.  Capacitor current feedback pulse train control technique for switching DC-DC converters , 2014 .

[7]  Jianping Xu,et al.  Bifrequency Pulse-Train Control Technique for Switching DC–DC Converters Operating in DCM , 2011, IEEE Transactions on Industrial Electronics.

[8]  Barry W. Williams,et al.  A Peak-Capacitor-Current Pulse-Train-Controlled Buck Converter With Fast Transient Response and a Wide Load Range , 2016, IEEE Transactions on Industrial Electronics.

[9]  Ming Cheng,et al.  Phase Compensation Resonant Controller for PWM Converters , 2013, IEEE Transactions on Industrial Informatics.

[10]  Ignacio Gonzalez-Prieto,et al.  Impact of Postfault Flux Adaptation on Six-Phase Induction Motor Drives With Parallel Converters , 2017, IEEE Transactions on Power Electronics.

[11]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[12]  Jianping Xu,et al.  Valley current mode pulse train control technique for switching DC-DC converters , 2014 .

[13]  Bocheng Bao,et al.  Pulse-Train-Controlled CCM Buck Converter With Small ESR Output-Capacitor , 2013, IEEE Transactions on Industrial Electronics.