Design and testing of a coaxial linear magnetic spring with integral linear motor
Abstract
The design of a coaxial linear magnetic spring which incorporates a linear motor to control axial motion and overcome system damping is presented, and the results of static and dynamic tests are reported. The system has nominal stiffness 25,000 N/m and is designed to oscillate a 900-g component over a 4.6-mm stroke in a Stirling-cycle cryogenic refrigerator being developed for long-service (5-10-yr) space applications (Stolfi et al., 1983). Mosaics of 10 radially magnetized high-coercivity SmCO5 segments enclosed in Ti cans are employed, and the device is found to have quality factor 70-100, corresponding to energy-storage efficiency 91-94 percent. Drawings, diagrams, and graphs are provided.
- Publication:
-
IEEE Transactions on Magnetics
- Pub Date:
- September 1985
- DOI:
- 10.1109/TMAG.1985.1064088
- Bibcode:
- 1985ITM....21.1759P
- Keywords:
-
- Linear Systems;
- Magnets;
- Spacecraft Power Supplies;
- Springs (Elastic);
- Cryogenic Equipment;
- Design Analysis;
- Performance Tests;
- Static Tests;
- Stiffness;
- Transient Response;
- Electronics and Electrical Engineering