The most widely known nonlinear phenomena in Micro-electro-mechanical systems (MEMS) are probably the contact instabilities. Contact problem is an important topic in the research of micro-motors. While the micro-motor is in operation, the rotor is intended to be in electrical contact with the ground plane, and the rotor and bearing hub form a pair of contact bodies. In the paper, a mathematic model is proposed to describe the contact process and two simplified contact finite element models of the rotor, bearing and ground plane are presented to simulate the contact. The effects on the contact stress, strain and pressure are analyzed in micro-scale. The rotor-to-bearing-hub and the hemispherical-bushing-on-ground-plane configurations finite element models (FEM) are established and the implementation of the contact problem is introduced to provide the numerical solutions acted as a guide to solution of contact problems in a variable capacitance micromotor. The numerical results of the contact stress, strain and pressure and the effects of the coefficient of friction and the surface roughness of the contact pairs on contact characteristics are studied and discussed in detail. It is indicated that the nonlinear effects should not be ignored and these results must be evaluated on a relative scale to compare different design options.
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ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 24–28, 2005
Long Beach, California, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-4738-1
PROCEEDINGS PAPER
Contact Analysis of the Rotor in a Variable Capacitance Micro-Motor Available to Purchase
Wen-Ming Zhang,
Wen-Ming Zhang
Shanghai Jiao Tong University, Shanghai, China
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Guang Meng
Guang Meng
Shanghai Jiao Tong University, Shanghai, China
Search for other works by this author on:
Wen-Ming Zhang
Shanghai Jiao Tong University, Shanghai, China
Guang Meng
Shanghai Jiao Tong University, Shanghai, China
Paper No:
DETC2005-84009, pp. 383-389; 7 pages
Published Online:
June 11, 2008
Citation
Zhang, W, & Meng, G. "Contact Analysis of the Rotor in a Variable Capacitance Micro-Motor." Proceedings of the ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Long Beach, California, USA. September 24–28, 2005. pp. 383-389. ASME. https://doi.org/10.1115/DETC2005-84009
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