Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Isolated Feedback of Inverter DC-Link Voltage Using Flyback Converters
Authors Kyung-Seo Kim
Page pp.281-285
ISSN 1229-2214
Keywords DC-link voltage ; Isolated feedback ; Voltage sensing ; Flyback converter
Abstract An isolated feedback method for measuring the inverter DC-link voltage is proposed. This method provides a simple and economical solution to inverter control systems that use a flyback converter as a controller power supply. In the proposed method, data on the DC-link voltage are acquired when the primary side voltage appears on the secondary side of the flyback transformer, thereby eliminating the need to adopt an extra signal isolation method. To solve the non-synchronization problem between the flyback converter switching and main controller sampling, the external interrupt function of the micro-controller is used as a trigger signal for the A/D conversion.