Generator for use in a microelectromechanical system

• US 6,750,596 B2
• Filed: 09/13/2002
• Issued: 06/15/2004
• Est. Priority Date: 12/31/2001
• Status: Expired due to Fees

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Song, Gui Eun, Kim, Kwang Ho, Jeon, Jae Hak, Lee, Yoon Pyo
• Primary Examiner(s): Dougherty, Thomas M.
• Application Number:
  US10/243,195
• Publication Number:
  US 20030122448A1
• Time in Patent Office: 641 Days
• Field of Search: 310/338, 310/339
• US Class Current: 310/339
• CPC Class Codes: H02K 35/02 with moving magnets and stationary coil systems
• CPC Class Codes: H02N 2/18 producing electrical output from mechanical input, e.g. generators for measurement devices G01

Abstract

A micro-electro-mechanical generator has a housing, a heater, a cooler, a heat transfer member, a supporting member, and fluid. The heater is formed in the housing and the cooler is formed in the housing opposite to the heater. The heat transfer member is positioned between the heater and the cooler and is provided with a first surface facing the heater and a second surface facing the cooler. The supporting member supports the heat transfer member at an external portion of the heat transferring member and is deformable between a first position where the heat transferring member is positioned adjacent to the heater, and a second position where the heat transferring member is positioned adjacent to the cooler. The supporting member also partitions the housing into a sealed first space at a side of the heater and a second space at a side of the cooler. The fluid is charged in the sealed first space. Electric energy is obtained whenever the deformation of the supporting member provided with a piezoelectric element.

Claims

1. A micro-electro-mechanical generator, comprising:

a housing;

a heating means disposed within said housing;

a cooling means disposed within said housing, and opposite to said heating means;

a heat transfer member positioned between said heating means and said cooling means, the heat transfer member having a first surface facing said heating means and a second surface facing said cooling means;

a supporting member supporting said heat transfer member at an external portion of said heat transfer member and being deformable between a first position wherein said heat transfer member is positioned adjacent to said heating means, and a second position wherein said heat transfer member is positioned adjacent to said cooling means, and the supporting member partitioning said housing into a sealed first space at a side of said heating means and a second space at a side of said cooling means, wherein the sealed first space and the second spaces, respectively adapted to be charged with a first fluid and a second fluid; and

a power-generating means generating electricity by using said deforming action by said supporting member.

2. The micro-electro-mechanical generator of claim 1, wherein said power-generating means comprises a piezoelectric element provided in said supporting member.

3. The micro-electro-mechanical generator of claim 1, wherein said power-generating means comprises said heat transfer member and a coil disposed in said housing, wherein said heat transfer member is a permanent magnet.

4. The micro-electro-mechanical generator of claim 1, wherein said first fluid is heated by said heating means to its boiling point and is cooled by said cooling means to condensation.

5. The micro-electro-mechanical generator of claim 1, wherein said heat transfer member further comprises a plurality of pins, the pins maintaining said first fluid in a liquid state with a capillary action therebetween.

6. The micro-electro-mechanical generator of claim 1, wherein said supporting member is alternatively deformed in a bi-stable snapping action wherein said first position and said second position of said supporting member are two stable positions.

7. The micro-electro-mechanical generator of claim 1, wherein said first fluid is selected from the group consisting of pentane and HFC-134a.