Abstract
A parallel resonant push-pull converter with magnetic amplifiers is investigated experimentally for the continuous-conduction-mode of the output-inductor current. As this resonant converter operates under the condition of zero-voltage switching and the current through transistor switches does not resonate, both the switching and the steady state power losses are suppressed and, as a result, high efficiency is attained. As voltage regulation is carried out by PWM function of magnetic amplifiers, it is not necessary to vary the switching frequency. Therefore, the size of reactive filter components can be minimized and the cause of the interference among several converters can be eliminated. This resonant converter also has the prominent feature of extremely low noise because of the zero-voltage switching operation, the noise suppression capability of the magnetic amplifiers and the inductors connected on the input and output sides. This paper describes experimental considerations on the static characteristics, the region of stable operation, power efficiency and output noise.
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