Abstract
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 shows 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.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 138th International Audio Engineering Society (AES) Convention. |
| Number of pages | 10 |
| Publisher | Audio Engineering Society |
| Publication date | 2015 |
| Publication status | Published - 2015 |
| Event | 138th Audio Engineering Society Convention - Warsaw, Poland Duration: 7 May 2015 → 10 May 2015 Conference number: 138 |
Conference
| Conference | 138th Audio Engineering Society Convention |
|---|---|
| Number | 138 |
| Country/Territory | Poland |
| City | Warsaw |
| Period | 07/05/2015 → 10/05/2015 |