A Theoretical Analysis of Eddy-Current Effects in Loudspeaker Motors

Bowler JR, Harfield N, Merricks NP, Woodman WJ. A Theoretical Analysis of Eddy-Current Effects in Loudspeaker Motors. J Audio Eng Soc. 2000;48(7/8):668-678. Available from: https://aes.org/publications/elibrary-page/?id=12053

@article{Bowler2000_12053,
  author = {Bowler, John R. and Harfield, Nicola and Merricks, Nick P. and Woodman, William J.},
  title = {{A Theoretical Analysis of Eddy-Current Effects in Loudspeaker Motors}},
  journal = {Journal of the Audio Engineering Society},
  volume = {48},
  number = {7/8},
  pages = {668--678},
  year = {2000},
  month = jul,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12053}
}

TY  - JOUR
TI  - A Theoretical Analysis of Eddy-Current Effects in Loudspeaker Motors
AU  - Bowler, John R.
AU  - Harfield, Nicola
AU  - Merricks, Nick P.
AU  - Woodman, William J.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 48
IS  - 7/8
SP  - 668
EP  - 678
PY  - 2000
DA  - 2000/07/06
UR  - https://aes.org/publications/elibrary-page/?id=12053
PB  - Audio Engineering Society
LA  - en
AB  - A linear theoretical model of the electromagnetic field associated with a short-coil, long-magnet loudspeaker is developed. Results show that the resistance of the voice coil is reduced and its inductance increased by replacing the steel near the voice coil with a polymer-based magnetic powder composite. This eliminates eddy currents near the coil and is suggested as a mechanism by which the third-harmonic electromotive field in the coil is reduced. Calculated values of impedance agree well with experimental data.
ER  -