Student Work

Low Profile Home Speaker: Moving Magnet Transducer

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This report describes the development of a novel moving magnet transducer. Typically, speakers that produce bass have a large footprint because they require a sufficient acoustic volume to deliver quality sound. Our team’s goal was to develop a moving magnet transducer capable of generating quality bass while maintaining the slimmest possible profile. This unique moving magnet transducer was inspired by an E-Core transformer and can produce more force per mass of magnet than commonly used moving coil transducers. In our design, current flows through coils that are wound around opposing arms of the low carbon-steel stator. The current induces a magnetic flux in the stator that causes it to act as an electromagnet. The permanent magnets centered in our design oscillate up and down as they interact with the electromagnet. In our design the permanent magnets are bonded to the speakers’ cone, so as they oscillate, the cone oscillates, and sound becomes audible. The final transducer measured 0.80” tall with a 2.94” diameter and produced a measured 1.24 N/Amp force output. An in-depth breakdown of our design process, manufacturing process, and operational performance results are contained within our report.

  • This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.
Creator
Publisher
Identifier
  • E-project-042418-231630
Advisor
Year
  • 2018
Sponsor
Date created
  • 2018-04-24
Location
  • Framingham
Resource type
Major
Rights statement
Last modified
  • 2021-01-26

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Permanent link to this page: https://digital.wpi.edu/show/qb98mh140