Modeling Distortion Effects in Class-D Amplifier Filter Inductors

Knott A, Stegenborg-Andersen T, Thomsen OC, Bortis D, Kolar JW, Pfaffinger G, Andersen MAE. Modeling Distortion Effects in Class-D Amplifier Filter Inductors. In: AES Convention 128. Audio Engineering Society; 2010. Paper 7997. Available from: https://aes.org/publications/elibrary-page/?id=15294

@inproceedings{Knott2010_15294,
  author = {Knott, Arnold and Stegenborg-Andersen, Tore and Thomsen, Ole C. and Bortis, Dominik and Kolar, Johann W. and Pfaffinger, Gerhard and Andersen, Michael A. E.},
  title = {{Modeling Distortion Effects in Class-D Amplifier Filter Inductors}},
  booktitle = {AES Convention 128},
  note = {Paper 7997},
  year = {2010},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15294}
}

TY  - CPAPER
TI  - Modeling Distortion Effects in Class-D Amplifier Filter Inductors
AU  - Knott, Arnold
AU  - Stegenborg-Andersen, Tore
AU  - Thomsen, Ole C.
AU  - Bortis, Dominik
AU  - Kolar, Johann W.
AU  - Pfaffinger, Gerhard
AU  - Andersen, Michael A. E.
T2  - AES Convention 128
M1  - Paper 7997
PY  - 2010
DA  - 2010/05/06
UR  - https://aes.org/publications/elibrary-page/?id=15294
PB  - Audio Engineering Society
LA  - en
AB  - Distortion is generally accepted as a quantifier to judge the quality of audio power amplifiers. In switch-mode power amplifiers various mechanisms influence this performance measure. After giving an overview of those, this paper focuses on the particular effect of the nonlinearity of the output filter components on the audio performance. While the physical reasons for both, the capacitor and the inductor induced distortion are given, the practical in depth demonstration is done for the inductor only. This includes measuring the inductors performance, modeling through fitting and resulting into simulation models. The fitted models achieve distortion values between 0.03 % and 0.2 % as a basis to enable the design of a 200 W amplifier.
ER  -