三相出力PWM制御サイクロコンバータを用いた高周波リンクDC/ACコンバータ

概要

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High frequency link DC/AC converters for UPS are characterized by small size and weight of the isolation transformers. Two types are considered in the high frequency link DC/AC converters. One is called a DC/DC converter type, and the other is a cycloconverter type. The DC/DC converter type can be constructed easily, but the efficiency is low because of many steps of power conversion The system configuration for the cycloconverter type with a single phase output has been proposed, but the cycloconverter type which directly converts high frequency voltage into three phase line voltages is not studied.In this paper, the system configuration and the control method of the high frequency link DC/AC converter with three-phase output voltages using the PWM cycloconverter are proposed. This system can control flow of power bidirectionally, and charge the DC power supply and compensate instantaneous reactive power. Simulations and experiments are carried out to confirm the feasibility of the proposed system.
社団法人電気学会の論文