The development of zero-voltage switching (ZVS) technique has attracted for many industrial applications. In this paper, a quasi resonant ZVS buck converter linked with a buck-boost component is presented. The proposed system has the following features. (1) The large peak current does not flow into the semiconductor switches and the reactors. (2) When a storage battery is used as the power supply, a solar battery can be connected with buck-boost component in order to charge the storage battery. Therefore, this system is very suitable for high power and high efficiency DC to DC converter system.
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