Flux Modulation in the Electrodynamic Loudspeaker

Halvorsen M, Tinggaard C, Agerkvist FT. Flux Modulation in the Electrodynamic Loudspeaker. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9317. Available from: https://aes.org/publications/elibrary-page/?id=17741

@inproceedings{Halvorsen2015_17741,
  author = {Halvorsen, Morten and Tinggaard, Carsten and Agerkvist, Finn T.},
  title = {{Flux Modulation in the Electrodynamic Loudspeaker}},
  booktitle = {AES Convention 138},
  note = {Paper 9317},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17741}
}

TY  - CPAPER
TI  - Flux Modulation in the Electrodynamic Loudspeaker
AU  - Halvorsen, Morten
AU  - Tinggaard, Carsten
AU  - Agerkvist, Finn T.
T2  - AES Convention 138
M1  - Paper 9317
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17741
PB  - Audio Engineering Society
LA  - en
AB  - This paper discusses the effect of flux modulation in the electrodynamic loudspeaker with main focus on the effect on the force factor. A measurement setup to measure the AC flux modulation with static voice coil is explained and the measurements show good consistency with FEA simulations. Measurements of the generated AC flux modulation shows that eddy currents are the main source to magnetic losses in form of phase lag and amplitude changes. Use of a copper cap shows a decrease in flux modulation amplitude at the expense of increased power losses. Finally, simulations show that there is a high dependency between the generated AC flux modulation from the voice coil and the AC force factor change.
ER  -