Achieving high efficiency and reducing the dimensions of switching inverters are key requirements in designing voltage converters as more and more electric devices are being supplied from batteries. The reduction in dimensions is possible with increased switching frequency. As the switching frequency increases, the switching losses of transistors also increase. This reduces the efficiency of converters.
In this section, the method of switching the transistors at zero voltage is presented, which enables the transistor to be turned on without loss of power. This results in increased efficiency of the converter at increased switching frequency. In this paper is presented the regulation of buck converter, which enables zero voltage switching and does not require additional changes in the circuit (adding elements). The converter operates in the "quasi-" discontinued current mode and exploits the interelectrode output capacitance of the MOSFET transistors. Equations relevant to the regulation of converter are also presented. The results of the regulation using these equations are verified in the LtSpice simulation program and on the real school model of buck converter. School converter was controlled with the DSP controller manufactured by Texas Instrument.
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