A New Asymmetric Duty-Cycle Control for a ZVS Self-Oscillating Half-Bridge Inverter

H. Belloumi(1*), F. Kourda(2)

(1) Superior institute of the Applied Sciences and Technology (ISSAT), Mateur, Tunisia
(2) National Engineers School of Tunis, Tunisia
(*) Corresponding author

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In this paper, a simple power control scheme for a constant frequency self-oscillating inverter with a variable duty cycle is proposed. The proposed topology, based on the half-bridge series resonant inverter, can achieve a stable and efficient Zero-Voltage-Switching (ZVS). As a consequence, the converter efficiency is significantly improved. This novel technique consists in injecting a DC control current through a saturable core providing a variable asymmetric control as a function of the injected current; we can therefore control and regulate the output power while maintaining the switching frequency close to the resonant one. The control principles of the proposed method are described in detail and its validity is verified through simulated and experimental results on 750 W with constant frequency variable power.
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Saturable Transformer with DC Control Current; Self-Oscillating Inverter; Asymmetrical Control; ZVS (Zero-Voltage-Switching)

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B.R. Lin, B.R. Hou, Analysis of a zero voltage switching DC/DC converter without output inductor, IET Power Electron., Vol. 6: 790-800, July 2012.

S. Urgun, Zero-voltage transition–zero-current transition pulse width modulation DC–DC buck converter with zero-voltage switching–zero-current switching auxiliary circuit, IET Power Electron., vol. 5: 627–634, May 2012.

Y.C. Chuang, Yu-L.Ke, H.Shiang Chuang, Yu-Min Chen, Analysis and Implementation of Half-Bridge Series–Parallel Resonant Converter for Battery Chargers, IEEE Transactions on Industry Applications,Vol. 47, (Issue 1):258 - 270, 2011.

H. Sarnago, A. Mediano, and O. Lucia, High Efficiency AC–AC Power Electronic Converter Applied to Domestic Induction Heating, IEEE Trans. Power Electron., Vol. 27, (Issue 8): 3676-3684, AUGUST 2012.

H. BELLOUMI, F. KOURDA, Self-oscillating half bridge series resonant converter at high efficiency, Electrotecnical conference (MELECON), 2012 16th IEEE Mediterranean, pp.306-311, Hamamet-Tunisia, March 2012.

J. heng Hsieh and Jong-Lick, Novel single-stage self-oscillating dimmable electronic ballasts with higth power factor correction, IEEE transactions on industrial electronics, Vol. 58, (Issue 1), pp. 3377 – 3380, January 2011.

Á. R. Seidel, F. E. Bisogno, and R. N. do Prado, A design methodology for a self-oscillating electronic ballast, IEEE Trans. Ind. Appl., Vol. 43,(Issue 6): 1524–1533, Decembre. 2007.

C. H. K. Y. M. H. Sakamoto, K. Harada and J. Kim, A self oscillated half bridge converter using impulse resonant soft switching, Telecommunications Energy Conference, 2002. INTELEC. 24th Annual International, pp.227-231, Canada, Octobre2002.

O. Lucia, C. Carretero, D. Palacios, D. Valeau andJ.M. Burdi´o , Configurable snubber network for efficiency optimisation of resonant converters applied to multi-load induction heating, Electronics Letters Vol. 47, (Issue 17): 989 – 991, August 2011.

W. Zhang,W. Chen,W. Yao, and Z. Lu, A novel optimized snubber with time-varying capacitor for synchronous rectification, analysis and implementation, in Proc. Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2009), Washington ,pp. 45–50.

Hwu, K.I., Shieh, J.-J., Development of EEFL lighting ballast based on isolated asymmetrical half-bridge LCC resonant inverter, (2012) International Review of Electrical Engineering (IREE), 7 (6), pp. 5982-5992.

Tsao-Tsung, M., Design of a high-performance half-bridge resonant inverter using piezoelectric transformer for driving LED, (2011) International Review of Electrical Engineering (IREE), 6 (1), pp. 67-74.


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