Abstract
The control system of magnetic bearing has a complex structure. Even the damage of a single control channel will lead to the failure of the whole magnetic bearing system. The reliability requirements limit magnetic bearings from being used in critical applications. To improve the reliability, a fault-tolerant current distribution scheme is presented for a magnetic bearing biased by permanent magnet. In this scheme, the one-dimensional magnetic circuit is used to analyze the force nearby the equilibrium point, and the current distribution matrices are obtained through analyzing the relationship between the normal control-current and the fault control-current. The scheme is effective and easy to implement in engineering. The experimental results indicate that the fault-tolerant scheme can realize static suspension and speed-raising of magnetically suspended flywheel on condition that the coil (power amplifier) is damaged, thus improving the reliability of the magnetic bearing system.
| Original language | English |
|---|---|
| Pages (from-to) | 34-40 |
| Number of pages | 7 |
| Journal | Jixie Gongcheng Xuebao/Journal of Mechanical Engineering |
| Volume | 46 |
| Issue number | 20 |
| DOIs | |
| State | Published - 20 Oct 2010 |
Keywords
- Fault-tolerant control
- Homopolar
- Magnetic bearing
- Reliability
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