Suspension design, modeling, and testing of a Thermo-acoustic driven linear Alternator

Chitta Saha, Paul Riley, Robert Jinks, Mark Johnson

Research output: Contribution to journalArticlepeer-review


The Score-Stove™ generates electricity from a wood-burning cooking stove using a thermo-acoustic engine that converts heat to sound through a Linear Alternator (LA). This paper introduces a prototype hemi-toroidal suspension that was refined into a segmented trapezoidal shape that gave a higher cyclic life for the linear alternator and includes a critical evaluation that compares a theoretical analysis with experimental results. The results show an improvement from the 40% efficiency of a standard loudspeaker used in reverse as an LA to 70 to 80% efficiency with the new suspension and a double Halbach array magnetic topology.
Original languageEnglish
Article number021014
Number of pages5
JournalJournal of Vibration and Acoustics Transaction on ASME
Issue number2
Early online date10 Nov 2017
Publication statusPublished - Apr 2018


  • Heat
  • Loudspeakers
  • Testing
  • Modeling
  • Design
  • Thermoacoustic devices
  • Engineering prototypes
  • Wood products
  • Acoustics
  • Combustion


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