Single-phase sinusoidal convertor using MOSFETs

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Abstract
The paper presents circuit configurations of a single-phase voltage-source AC-DC convertor for applications with a small output power, in which a regenerative capability is not required. In this circuits, MOSFETs are employed so that their integral reverse-conducting diodes are available for use. The supply current can be sinusoidally controlled with a near unity power factor by means of current reference hysteresis control The steady-state characteristics are investigated by experiments and state-space analysis. In addition, transient responses, with a PI controller using a microcomputer to keep the constant output voltage, are shown. These results confirm the usefulness of the presented circuit configurations.

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