Open AccessDesign of a 100 kHz wide bandgap inverter for motor applications with active damped sine wave filter
Author(s) -
Maislinger Franz,
Ertl Hans,
Stojcic Goran,
Lagler Christoph,
Holzner Florian
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8059
Subject(s) - inverter , sine wave , filter (signal processing) , electromagnetic interference , motor drive , emi , capacitor , electronic engineering , control theory (sociology) , computer science , voltage , engineering , electrical engineering , control (management) , artificial intelligence , mechanical engineering
In this study, a three‐phase motor inverter with sinusoidal output voltages based on the application of gallium nitride transistors and advanced control is analysed. In comparison to standard silicon‐insulated gate bipolar transistors much higher feasible switching frequencies of 100 kHz and above are possible and reduce the output sine filter component size such that the filter can be directly included into the inverter. This considerably improves the electromagnetic interference (EMI) behaviour of the drive system as well as the acoustic noise, eases the inverter‐to‐motor wiring and protects the motor isolation against high d u /d t rates. The study describes the dimensioning and design of the used two‐stage LC filter including motor current control based on proportional‐integral‐type phase current controllers. The LC filter damping is performed actively by capacitor current feedback. Using this active damping scheme avoids additional losses of conventional sine filters and guarantees high system efficiency up to 98%. Finally, experimental results of a laboratory prototype verify the proper behaviour of the proposed concept.