Improvement in THD and Good Power Factor for Three Phase AC-DC Converter by using PWM and Capacitor Technique
Keywords:
Full-bridge converters, Input current shaping, low-distortion input current, single-stage power factor correctors (PFCs)Abstract
A novel single stage high step up full bridge AC-DC converter, based on the concept of switched capacitor topology existing in high step up DC-DC converter, is proposed in this work. In switched capacitor technique, capacitors on secondary side are charged in parallel during the switch-off period, by the energy stored in the coupled inductor, and are discharged in series during the switch-on period to achieve a high step-up voltage gain. The switched capacitor technique meant for high voltage gain is discussed in many conventional DC-DC converters. The proposed AC-DC full bridge converter converts the input AC voltage into DC and boost with a high voltage gain in a single stage. For high voltage gain AC-DC converters many techniques are proposed in literature. In this work, switched capacitor technique is used in AC-DC converter’ is a novel method for attaining high voltage gain. Open loop control of the proposed converter is done by using PWM control. The closed-loop control methodology is utilized in the proposed scheme to overcome the voltage-drift problem of power source under the variation of loads. The operating principle, steady state analysis and design of proposed single stage high step up AC-DC converter is carried out. Simulation results, using MATLAB, are carried out for proposed AC-DC converter.
References
Fengjiang Wu and Xiaoguang Li, “Improved Modulation for Dual Active Bridge Based Three-Phase Single-Stage AC-DC Converter”, 978-1-7281-0395-2/19/$31.00 ©2019 IEEE.
Felix Jauch and Jürgen Biela, “Combined Phase-Shift and Frequency Modulation of a Dual-Active-Bridge AC–DC Converter With PFC”, IEEE Transactions on Power. Volume: 31 Issue: 12, 2016.
Sin-Woo Lee and Hyun-Lark Do, “Single-Stage Bridgeless AC–DC PFC Converter Using a Lossless Passive Snubber and Valley Switching”, IEEE Transactions on Industri.. Volume: 63 Issue: 10 . 2016.
Chushan Li and Yu Zhang, “Single-Phase Single-Stage Isolated ZCS Current-Fed Full-Bridge Converter for High Power AC/DC Applications”, IEEE Transactions on Power El. Volume: PP Issue: 99 2016.
Revathi V I, Muhammedali Shafeeque K" Closed Loop Operation of High Boost OC-OC Converter Operating in CCM Mode" in Proc. International Journal of Scientific Engineering and Applied Science (IJSEAS). vol-1, no.4 June 2015.
“A novel primary-side regulation scheme for single-stage high-power-factor AC–DC LED driving circuit”, IEEE Trans. Ind. Electron., vol. 60, no. 11, pp. 4979-4986, Nov. 2013.
A. A. Fardoun, E. H. Ismail, N. M. Khraim, A. J. Sabzali, M. A. Al-Saffar, "Bridgeless high-power-factor buck-converter operating in discontinuous capacitor voltage mode", IEEE Trans. Ind. Appl., vol. 50, no. 5, pp. 66-72, Sep./Oct. 2014.
V. Nimesh and V. John, “Dual comparison one cycle control for single phase ac to dc converters,” in Power Electronics, Drives and Energy Systems (PEDES), 2014 IEEE International Conference on. Mumbai, Maharashtra, India, 2014, pp. 1–6.
J.-W. Shin, S.-J. Choi, B.-H. Cho, "High-efficiency bridgeless flyback rectifier with bidirectional switch and dual output windings", IEEE Trans. Power Electron., vol. 29, no. 9, pp. 4752-4762, Sep. 2014.
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