Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response

Leach J,WM. Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response. J Audio Eng Soc. 2002;50(6):442-450. Available from: https://aes.org/publications/elibrary-page/?id=11074

@article{Leach2002_11074,
  author = {Leach, Jr., W. Marshall},
  title = {{Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response}},
  journal = {Journal of the Audio Engineering Society},
  volume = {50},
  number = {6},
  pages = {442--450},
  year = {2002},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11074}
}

TY  - JOUR
TI  - Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response
AU  - Leach, Jr., W. Marshall
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 50
IS  - 6
SP  - 442
EP  - 450
PY  - 2002
DA  - 2002/06/06
UR  - https://aes.org/publications/elibrary-page/?id=11074
PB  - Audio Engineering Society
LA  - en
AB  - When the series resistance is separated and treated as a separate element, it is shown that losses in an inductor require the ratio of the flux to MMF in the core to be frequency dependent. For small-signal operation, this dependence leads to a circuit model composed of a lossless inductor and a resistor in parallel, both of which are frequency dependent. Mathematical expressions for these elements are derived under the assumption that the ratio of core flux to MMF varies as wn - 21, where n is a constant. A linear regression technique is described for extracting the model parameters from measured data. Experimental data are presented to justify the model for the lossy inductance of a loudspeaker voice coil. A SPICE example is presented to illustrate the effects of voice-coil inductor losses on the frequency response of a typical driver.
ER  -