LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Indirect IGBT Over-Current Detection Technique Via Gate Voltage Monitoring and Analysis

Photo from wikipedia

This paper presents a new insulated gate bipolar transistor (IGBT) over-current detection method based on the analysis of the gate voltage waveform. The IGBT's gate voltage turn-on transient pattern is… Click to show full abstract

This paper presents a new insulated gate bipolar transistor (IGBT) over-current detection method based on the analysis of the gate voltage waveform. The IGBT's gate voltage turn-on transient pattern is analyzed for the detection of IGBT hard switching fault (HSF). The on-state gate voltage is monitored to detect IGBT fault under load (FUL). The IGBT's turn-off Miller plateau voltage is extracted and measured to sense the IGBT collector current in case of an over-load condition. Compared to the commonly used IGBT short-circuit detection methods or collector current sensing methods, this method can provide indirect fast detection of IGBT short circuit and accurate measurement of over-load within one switching period. The feasibility and effectiveness of the proposed approach are validated both by simulation and experimental results. Measurement results show that HSF and FUL can be detected within 0.6 and 0.5 μs, respectively. By comparing the extracted plateau voltage (VPL) with a preset reference voltage (V$_{{\text{OC}}x}$), the IGBT over-load can be detected with a maximum deviation of ±1.2 A when IC ranges from 3 to 110 A.

Keywords: voltage; igbt; current detection; gate voltage; igbt current

Journal Title: IEEE Transactions on Power Electronics
Year Published: 2019

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.