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

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W.. MA. Leach, "Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response," J. Audio Eng. Soc., vol. 50, no. 6, pp. 442-450, (2002 June.). doi:
W.. MA. Leach, "Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response," J. Audio Eng. Soc., vol. 50 Issue 6 pp. 442-450, (2002 June.). doi:
Abstract: 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.

@article{leach2002loudspeaker,
author={leach, jr., w. marshall},
journal={journal of the audio engineering society},
title={loudspeaker voice-coil inductance losses: circuit models, parameter estimation, and effect on frequency response},
year={2002},
volume={50},
number={6},
pages={442-450},
doi={},
month={june},}
@article{leach2002loudspeaker,
author={leach, jr., w. marshall},
journal={journal of the audio engineering society},
title={loudspeaker voice-coil inductance losses: circuit models, parameter estimation, and effect on frequency response},
year={2002},
volume={50},
number={6},
pages={442-450},
doi={},
month={june},
abstract={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.},}

TY - paper
TI - Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response
SP - 442
EP - 450
AU - Leach, Jr., W. Marshall
PY - 2002
JO - Journal of the Audio Engineering Society
IS - 6
VO - 50
VL - 50
Y1 - June 2002
TY - paper
TI - Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response
SP - 442
EP - 450
AU - Leach, Jr., W. Marshall
PY - 2002
JO - Journal of the Audio Engineering Society
IS - 6
VO - 50
VL - 50
Y1 - June 2002
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.

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.

Author:
Leach, Jr., W. Marshall
Affiliation:
Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA JAES Volume 50 Issue 6 pp. 442-450; June 2002
Publication Date:
June 15, 2002Import into BibTeX
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