microball bearings
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2017 ◽  
Vol 114 ◽  
pp. 402-408 ◽  
Author(s):  
Weixu Yang ◽  
Xiaoli Wang ◽  
Hanqing Li ◽  
Xintao Song


2013 ◽  
Vol 22 (3) ◽  
pp. 794-803 ◽  
Author(s):  
Mustafa Beyaz ◽  
Brendan Hanrahan ◽  
Jeremy Feldman ◽  
Reza Ghodssi

This paper presents the design, fabrication, and testing of an integrated microturbogenerator utilizing permanent magnets and microball bearings. The key components of this generator are the following: 1) a silicon microturbine rotor housing thick magnetic components; 2) encapsulated microball bearings providing a simple actuation scheme and a robust support structure; and 3) wafer-thick stator coils. The microturbogenerator was designed and fabricated to have a ten-pole rotor and a ten-pole three-turns-per-pole stator. The impedance of the stator coils was shown to be a purely resistive 220 Ω up to 10 kHz. The spin-down characterization of the rotor revealed a dynamic friction torque of 33 μN·m at a rotational speed of 16 kilo rotations per minute (krpm), corresponding to 6% turbine efficiency. The maximum per-phase ac open-circuit voltage and power were measured to be 0.1 V and 5.6 μW on a matched load at 23 krpm, respectively, in full agreement with theoretical analysis and performance estimations. The microturbogenerator presented in this paper provides a flexible design platform for further improvement and will lead to the development of next-generation integrated microturbogenerators offering high power, simple operation, and robust mechanics.



2011 ◽  
Vol 21 (6) ◽  
pp. 065001 ◽  
Author(s):  
Zhaohui Yang ◽  
Jing Wang ◽  
Jinwen Zhang


2010 ◽  
Vol 19 (1) ◽  
pp. 99-109 ◽  
Author(s):  
Christopher Mike Waits ◽  
Matthew McCarthy ◽  
Reza Ghodssi


2009 ◽  
Vol 19 (9) ◽  
pp. 094007 ◽  
Author(s):  
Matthew McCarthy ◽  
C Mike Waits ◽  
Mustafa I Beyaz ◽  
Reza Ghodssi
Keyword(s):  


2008 ◽  
Vol 17 (3) ◽  
pp. 632-642 ◽  
Author(s):  
N. Ghalichechian ◽  
A. Modafe ◽  
M.I. Beyaz ◽  
R. Ghodssi


2007 ◽  
Vol 136 (2) ◽  
pp. 496-503 ◽  
Author(s):  
Nima Ghalichechian ◽  
Alireza Modafe ◽  
Jeffrey H Lang ◽  
Reza Ghodssi


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