A dynamic regulating mechanism for increased airflow speed range in micro piezoelectric turbines
Author(s)
Fu, H
D'Auria, M
Dou, G
Yeatman, E
Type
Conference Paper
Abstract
The paper reports the design and fabrication of a
micro-planar spring for a dynamic regulating mechanism
to decrease the cut-in (start-up) airflow speed of a
piezoelectric turbine. This mechanism is implemented by
adjusting the magnetic coupling between the turbine rotor
and a piezoelectric cantilever using the spring. Varied
spring shapes and dimensions were analyzed with the finite
element method (FEM) to optimize the structure. A micro
spring with an ultra-low spring constant of 0.78 N/m was
fabricated from titanium foil by laser machining. The
spring was installed into a miniaturized air turbine to
achieve the self-regulation. The cut-in speed was 2.34 m/s,
showing a 30% improvement against a non-regulated
turbine.
micro-planar spring for a dynamic regulating mechanism
to decrease the cut-in (start-up) airflow speed of a
piezoelectric turbine. This mechanism is implemented by
adjusting the magnetic coupling between the turbine rotor
and a piezoelectric cantilever using the spring. Varied
spring shapes and dimensions were analyzed with the finite
element method (FEM) to optimize the structure. A micro
spring with an ultra-low spring constant of 0.78 N/m was
fabricated from titanium foil by laser machining. The
spring was installed into a miniaturized air turbine to
achieve the self-regulation. The cut-in speed was 2.34 m/s,
showing a 30% improvement against a non-regulated
turbine.
Date Issued
2016-01-28
Date Acceptance
2015-11-20
Citation
2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), 2016, pp.1220-1223
Publisher
IEEE
Start Page
1220
End Page
1223
Journal / Book Title
2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS)
Copyright Statement
© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Source
2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS)
Publication Status
Published
Start Date
2016-01-24
Finish Date
2016-01-28
Coverage Spatial
Shanghai, China