Research Article
A Novel Integral 5-DOFs Hybrid Magnetic Bearing with One Permanent Magnet Ring Used for Turboexpander
Table 1
Design parameters of the combined 5-DOFs HMB.
| Parameters | Value |
| Inner diameter of the RMB unit rotor stacks (mm) | 46 | Outer diameter of the RMB unit rotor stacks (mm) | 68 | Length of the RMB unit rotor stacks (mm) | 20 | Inner diameter of the RMB unit stator (mm) | 69 | Outer diameter of the RMB unit stator (mm) | 113 | Length of the RMB unit stator (mm) | 20 | Radial pole shoe area (mm2) | 734 | The number of winding turns in coil of RMB unit | 220 | Inner diameter of the axial pole shoe (mm) | 76 | Outer diameter of the axial pole shoe (mm) | 90 | The number of winding turns in coil of AMB unit | 250 | The radial and axial air gap (mm) | 0.5 | Relative permeability of the permanent magnet ring | 1.082 | Outer diameter of the permanent magnet ring (mm) | 126 | Inner diameter of the permanent magnet ring (mm) | 113 | Length of the permanent magnet ring (mm) | 5 |
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