Title :
Analysis of PWM frequency control to improve the lifetime of PWM inverter
Author :
Wei, Lixiang ; Mcguire, Jeffrey ; Lukaszewski, Richard A.
Author_Institution :
Rockwell Autom. - Allen Bradley, Mequon, WI, USA
Abstract :
Studies have shown that the power cycling Mean Time to Failure (MTTF) of the IGBT bond wire in an adjustable speed drive (ASD) may be very short under some very common conditions. This paper proposes a switching frequency reduction method based on junction temperature variation (DeltaTj) of the inverter IGBT. It has the following advantages. Firstly, it only reduces the PWM frequency under low speed higher torque condition; secondly, the inverter can be started more smoothly and safely under higher command switching frequency and high torque condition. Thirdly, the overall MTTF of the inverter IGBT can be improved dramatically. Theory analysis, simulation and experimental result will be provided to show these advantages.
Keywords :
PWM invertors; frequency control; insulated gate bipolar transistors; torque; variable speed drives; IGBT bond wire; PWM frequency control; PWM inverter lifetime; adjustable speed drive; junction temperature variation; power cycling mean time to failure; pulsed width modulation; switching frequency reduction method; torque condition; ΔTj control; MTTF; Power cycling capability; adjustable speed drive;
Conference_Titel :
Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-2893-9
Electronic_ISBN :
978-1-4244-2893-9
DOI :
10.1109/ECCE.2009.5316129
