導体と磁石間の相対運動を用いた磁気軸受の電磁場解析 [in Japanese] Analysis of Magnetic Bearing Using Inductive Levitation by Relative Motion between Magnet and Conductor [in Japanese]
Access this Article
Search this Article
In chemical plants, anticorrosion magnetic drive pump is commonly used to deliver corrosive chemical liquid because of its high anti-corrosion performance. However, when bubbles enter in the chemical pump and accumulate between the shaft and the bearing, the shaft is often broken by thermal shock. The magnetic bearing which holds the rotor in non-contact has a good advantage to avoid thermal shock and to keep the rotor in a stable state by restoring force induced from eddy current in the conductor. The model of magnetic bearing was analyzed using three dimensional finite element method. In this model, the restoring force of 68.6N and the braking torque of 8.7N·m were obtained. The locus of rotation axis was also estimated from a radial load and a drag coefficient. The rotor may locate inside the movable range.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 126(12), 1699-1705, 2006-12-01
The Institute of Electrical Engineers of Japan