Abstract
A novel cylindrical magnetic levitation gravity compensator was proposed in this paper. The secondary adopted Halbach permanent magnet structure that had such excellent advantages as large levitation force and low vertical stiffness. The structure of this new-type magnetic levitation gravity compensator was introduced and its mathematical model was built. The air gap magnetic flux density from permanent magnet rings was calculated using equivalent current method. The expressions of static levitation force, dynamic levitation force and stiffness were derived. Through finite element simulation, the static characteristics of cylindrical magnetic levitation gravity compensator were obtained. And the special problems of low stiffness passive magnetic levitation were explained. Finally, a prototype was manufactured. The prototype experiment verified the feasibility of the proposed magnetic levitation gravity compensator.
| Original language | English |
|---|---|
| Pages (from-to) | 30-37 |
| Number of pages | 8 |
| Journal | Diangong Jishu Xuebao/Transactions of China Electrotechnical Society |
| Volume | 31 |
| Issue number | 6 |
| State | Published - 25 Mar 2016 |
| Externally published | Yes |
Keywords
- Gravity compensator
- Halbach permanent magnet arrays
- Low stiffness
- Magnetic field analysis
- Magnetic levitation
- Voice coil motor
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