Dead Time Adaptive Control for Efficiency Improvement of GaN Transistor Based SPWM Modulated Inverter

2024 IEEE 21st International Power Electronics and Motion Control Conference (PEMC 2024): Proceedings 2024
Kaspars Kroičs, Kristiāns Gaspersons

Application of GaN transistors into design of three phase inverter can increase the efficiency. Further increase in efficiency can be achieved if the dead time is optimized since GaN transistors have higher voltage drop in reverse conduction region. The paper proposes adaptive change of dead time value during the period of sinusoidal current since optimal dead time depends on load current. Based on LT Spice simulation model and experimental measurements optimal dead time values at different load currents have been determined and look up table for implementation into microcontroller has been created. GaN based inverter was tested with adaptive dead time control pulses. Thermal measurements and simulation results show improvement of the efficiency of the inverter. The temperature of the transistors was reduced by 2 degrees Celsius after implementation of adaptive dead time.

Keywords
BLDC motor | dead time | efficiency | electrical drives | GaN transistors | inverter
DOI
10.1109/PEMC61721.2024.10726381
Hyperlink
https://ieeexplore-ieee-org.resursi.rtu.lv/document/10726381

Kroičs, K., Gaspersons, K. Dead Time Adaptive Control for Efficiency Improvement of GaN Transistor Based SPWM Modulated Inverter. In: 2024 IEEE 21st International Power Electronics and Motion Control Conference (PEMC 2024): Proceedings, Czech Republic, Pilsen, 30 Sep-3 Oct., 2024. Piscataway: IEEE, 2024, pp.1-5. ISBN 979-8-3503-8524-3. e-ISBN 979-8-3503-8523-6. ISSN 2469-8741. e-ISSN 2473-0165. Available from: doi:10.1109/PEMC61721.2024.10726381

Publication language
English (en)