A Modulation Compensation Scheme to Reduce Input Current Distortion in GaN-Based High Switching Frequency Three-Phase Three-Level Vienna-Type Rectifiers

Wide bandgap semiconductors are gradually being adopted in high power-density high efficiency applications, providing faster switching and lower loss, and at the same time imposing new challenges in control and hardware design. In this paper, a gallium nitride-based Vienna-type rectifier with SiC diodes is proposed to serve as the power factor correction stage in a high-density battery charger system targeting for aircraft applications with 800 Hz ac system and 600 V level dc link, where power quality is required according to DO160E standard. To meet the current harmonic requirement, PWM voltage distortion during the turn-off transient, is studied as the main harmonics contributor. The distortion mechanism caused by different junction capacitances of the switching devices is presented. A mitigation scheme considering the nonlinear voltage-dependent characteristics of these capacitances is proposed and then simplified from a pulse-based turn-off compensation method to a general modulation scheme. Simulation and experimental results with a 450 kHz Vienna-type rectifier demonstrate the performance of the proposed approach, showing a THD reduction from 10% to 3% with a relatively low-speed controller.

[1]  Doron Shmilovitz,et al.  A pure realization of loss-free resistor , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  F. Wang,et al.  Review of Commercial GaN Power Devices and GaN-Based Converter Design Challenges , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[3]  Yunjie Gu,et al.  Analysis and compensation of dead-time effect considering parasitic capacitance and ripple current , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).

[4]  Dragan Maksimovic,et al.  Circuit-Oriented Treatment of Nonlinear Capacitances in Switched-Mode Power Supplies , 2015, IEEE Transactions on Power Electronics.

[5]  J. W. Kolar,et al.  On the Tradeoff Between Input Current Quality and Efficiency of High Switching Frequency PWM Rectifiers , 2012, IEEE Transactions on Power Electronics.

[6]  Fred Wang,et al.  Characterization of an enhancement-mode 650-V GaN HFET , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[7]  Fred Wang,et al.  Temperature-dependent turn-on loss analysis for GaN HFETs , 2016, 2016 IEEE Applied Power Electronics Conference and Exposition (APEC).

[8]  Jiaxin Yuan,et al.  An immune-algorithm-based dead-time elimination PWM control strategy in a single-phase inverter , 2015, 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[9]  D. Boroyevich,et al.  Average Modeling and Control Design for VIENNA-Type Rectifiers Considering the DC-Link Voltage Balance , 2009, IEEE Transactions on Power Electronics.

[10]  Seung-Ki Sul,et al.  A new compensation strategy reducing voltage/current distortion in PWM VSI systems operating with low output voltages , 1995 .

[11]  S. Singer.  The application of 'loss-free resistors' in power processing circuits , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[12]  B. J. Blalock,et al.  Compensation of input current distortion in three-phase buck rectifiers , 2013, 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[13]  Bo Liu,et al.  Capacitor-Clamped, Three-level GaN-Based DC–DC Converter With Dual Voltage Outputs for Battery Charger Applications , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[14]  Longya Xu,et al.  Dead-Time Compensation of Inverters Considering Snubber and Parasitic Capacitance , 2014, IEEE Transactions on Power Electronics.

[15]  Russel J. Kerkman,et al.  Pulse-based dead-time compensator for PWM voltage inverters , 1997, IEEE Trans. Ind. Electron..

[16]  Alex Q. Huang,et al.  Physics understanding of high temperature behavior of Gallium Nitride power transistor , 2016, 2016 IEEE 4th Workshop on Wide Bandgap Power Devices and Applications (WiPDA).

[17]  Dushan Boroyevich,et al.  Advances in Power Conversion and Drives for Shipboard Systems , 2015, Proceedings of the IEEE.

[18]  Sandro Calligaro,et al.  Self-Commissioning of Inverter Dead-Time Compensation by Multiple Linear Regression Based on a Physical Model , 2015, IEEE Transactions on Industry Applications.

[19]  Frede Blaabjerg,et al.  Harmonics mitigation of dead time effects in PWM converters using a repetitive controller , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).