Browsing by Author "Hackenberger, Wesley S."

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    A piezoelectric single crystal traveling wave step motor for low-temperature application
    Dong, Shuxiang; Yan, Li; Viehland, Dwight D.; Jiang, X. N.; Hackenberger, Wesley S. (AIP Publishing, 2008-04-01)
    A piezoelectric Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) single crystal traveling wave rotary motor operated in a stepping motion for cryogenic actuations was developed and characterized. This single crystal stepping motor had a torque of >= 1.5 kg cm, an excess of 1800 steps per revolution about its axis, and a power consumption of <= 2 W by using a step motion with 25% duty cycle. We then show that this single crystal motor can successfully operate at 77 K (liquid nitrogen) under a load. (c) 2008 American Institute of Physics. (c) 2008 American Institute of Physics.
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    A small, linear, piezoelectric ultrasonic cryomotor
    Dong, Shuxiang; Yan, Li; Wang, Naigang; Viehland, Dwight D.; Jiang, Xiaoning; Rehrig, P.; Hackenberger, Wesley S. (AIP Publishing, 2005-01-01)
    A small, linear-type, piezoelectric ultrasonic cryomotor has been developed for precision positioning at extremely low temperatures (greater than or equal to-200 degreesC). This cryornotor consists of a pair of Pb(Mgl(1/3)Nb(2/3))O-3-PbTiO3 single crystal stacks, which are piezoelectrically excited into the rotating third-bending mode of the cryomotor stator's center, which in turn drives a contacted slider into linear motion via frictional forces. The performance characteristics achieved by the cryornotor are: (i) a maximum linear speed of >50 mm/s; (ii) a stroke of >10 mm; (iii) a driving force of >0.2 N; (iv) a response time of similar to29 ms; and (v) a step resolution of similar to20 nm. (C) 2005 American Institute of Physics.