HPHT Transducer
The HPHT Transducer was created when ETREMA was contracted by Badger Explorer ASA (www.bxpl.com) to design, build, and test a series of high power transducers capable of operating and surviving in a down-hole environment. A key requirement for these transducers was to minimize any risk of failure as this would have a significant impact on tool performance. Galfenol was selected as the core transducer technology offering the robustness and high operating temperatures desired for the targeted applications.
ETREMA completed detailed Finite Element Analyses (FEA) on the magnetic, modal, thermal, and stress conditions in order to achieve the design requirements. This included transient analyses for thermal and fatigue analyses for stress.
Sketches of the main transducer components are provided in the figures. For the complete transducer assembly, the housing has been made transparent so the internals could be viewed. The Galfenol Motor section is shown in more detail in the second figure. It consists of two Galfenol columns with permanent magnets located on the perimeter to provide the appropriate level of magnetic biasing.
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