Variable stiffness magnetic spring
This disclosure presents a new type of variable stiffness magnetic spring, which can have a highly linear translational force characteristic. The variable stiffness is achieved through the rotation of a central magnet. Both positive and negative spring constants can be created. Using an analytic-based field analysis modelling technique, the operating principle and linearity characteristics of the adjustable magnetic spring are studied. The use of a magnetic spring with an adjustable negative spring constant could enable an ocean generator to continuously operate in a resonant state, thereby greatly increasing its power generation capability. The described variable stiffness spring could also be useful in other energy harvesting applications, robotic actuator applications, and/or other applications.
- Research Organization:
- Portland State University, OR (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0008631
- Assignee:
- Portland State University (Portland, OR)
- Patent Number(s):
- 11,879,516
- Application Number:
- 16/996,790
- OSTI ID:
- 2541721
- Country of Publication:
- United States
- Language:
- English
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