On-line Remote Diagnosis System for DC Bus Capacitor of Power Converters Using Zigbee Communication and method thereof

摘要

The present invention processes a specific switching frequency in real time for each power conversion device by using a simple method of estimating the ESR from the loss of the AC power after signal processing the AC ripple voltage and the current component of the capacitor The present invention relates to an on-line remote fault diagnosis system for a DC-bus capacitor of a power conversion device using a Zigbee communication system, and is provided with a power conversion system, And outputs a resultant value; And an ESR monitoring and analyzing device for analyzing and monitoring the state of the DC bus capacitor based on the ESR value estimated from the DC bus capacitor failure detecting device and outputting a failure notification message to the outside when the DC bus capacitor fails in the analysis result . Therefore, it is possible to realize real-time implementation by a simple method of estimating the ESR from the loss of the AC power after signal processing process of the AC coupling with the ripple voltage and current component of the capacitor.;