New concept of active control of transformer noise, Part 1: The active envelope

Authors

  • Andrée L'Esperance Universite de Sherbrooke, Sherbrooke, Canada
  • Bruno Paillard Universite de Sherbrooke, Sherbrooke, Canada
  • Stephane Boucher Universite de Sherbrooke, Sherbrooke, Canada
  • Philippe Michaud Universite de Sherbrooke, Sherbrooke, Canada

Keywords:

Electric transformers, Harmonic analysis, Mathematical models, Sensors, Active noise control (ANC)

Abstract

A new concept of active noise control for transformer using a set of independent control units distributed on the transformer blade has been proposed. A theoretical model has been developed to determine the optimum distribution of the control unit on a transformer surface. An experimental setup composed of 24 control units has also been realized. This system allowed to determine that a distance of about 0.20 m between the error sensor and the speaker of each control unit ensures good stability of the system. An experiment realized on a real transformer gave a noise reduction of 10 dB of the first harmonics.

Additional Files

Published

1998-09-01

How to Cite

1.
L’Esperance A, Paillard B, Boucher S, Michaud P. New concept of active control of transformer noise, Part 1: The active envelope. Canadian Acoustics [Internet]. 1998 Sep. 1 [cited 2026 Apr. 30];26(3):8-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1130

Issue

Vol. 26 No. 3 (1998)

Section

Proceedings of the Acoustics Week in Canada

License

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