A New High Efficiency Half Bridge Converter with Improved ZVS Performance

Sung-Sae Lee; Sang-Kyoo Han; Gun-Woo Moon

A New High Efficiency Half Bridge Converter with Improved ZVS Performance

Sung-Sae Lee

Sang-Kyoo Han

Gun-Woo Moon

Vol. 6, No. 3, pp. 187-194, Jul. 2006

10.6113/JPE.2006.6.3.187

DC/DC power conversion

Pulse width modulation

Power supplies

Power distribution

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Abstract

A new asymmetrical pulse width modulation (PWM) half bridge converter with improved ZVS performance is proposed. The ZVS operation of the proposed converter can be maintained from no load to full load conditions since the magnetizing current of the transformer contributes to the ZVS operation at light loads without considerable conduction loss of the transformer and switch. Synchronous rectification is employed to reduce the rectification loss. Operational principles, large signal modeling, ZVS analysis and design equations are presented. Experimental results demonstrate that the proposed converter can achieve a large ZVS range and significant improvement in efficiency for a 100W (5V, 20A) prototype converter.

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Cite this article

[IEEE Style]

S. Lee, S. Han, G. Moon, "A New High Efficiency Half Bridge Converter with Improved ZVS Performance," Journal of Power Electronics, vol. 6, no. 3, pp. 187-194, 2006. DOI: 10.6113/JPE.2006.6.3.187.

[ACM Style]

Sung-Sae Lee, Sang-Kyoo Han, and Gun-Woo Moon. 2006. A New High Efficiency Half Bridge Converter with Improved ZVS Performance. Journal of Power Electronics, 6, 3, (2006), 187-194. DOI: 10.6113/JPE.2006.6.3.187.