Journal of Shandong University(Engineering Science) ›› 2019, Vol. 49 ›› Issue (4): 86-92.doi: 10.6040/j.issn.1672-3961.0.2018.498

• Mechanical, Energy and Power Engineering • Previous Articles     Next Articles

Influence of magnetic suspension rotor driving magnetic field on supporting magnetic field

Xiaoguang WANG1,2(),Zhuang HE1,Xianfu LI1,Ao PAN1   

  1. 1. School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
    2. Hubei Magnetic Suspension Engineering Technology Research Center, Wuhan 430070, Hubei, China
  • Received:2018-11-23 Online:2019-08-20 Published:2019-08-06
  • Supported by:
    国家自然科学青年基金资助项目(51205300)

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Abstract:

Based on theoretical analysis and finite element simulation analysis, the mutual influence between the driving magnetic field of rotor disk motor and the supporting magnetic field of the magnetic levitation system were studied, the main factor L0 was obtained. The critical dimension L0 value was 11.87 mm to keep the system steady with the influence of the driving magnetic field on the supporting magnetic field. And the critical dimension was tested by equivalent tests. According to the critical dimension L0, the design criteria of the magnetic suspension rotor and a feasible scheme of the magnetic suspension rotor were proposed.

Key words: magnetic levitation rotor, support magnetic field, drive magnetic field, finite element method, critical dimension

CLC Number: 

  • TH133.31

Table 1

Basic parameters of disk motor"

参数数值
定子转子气隙δ/mm0.59
额定电枢电流IN/A13.47
轭部磁密Bj1/T0.69
磁极对数2
线圈匝数Nd268
额定转速ω/rpm6 000

Fig.1

Distribution of disc-motor rotor permanent magnet"

Fig.2

Magnetic motor theoretical distribution of disk motor"

Fig.3

Simulation diagram of circumferential magnetic density of the disc motor"

Fig.4

Schematic diagram of the axial support structure of the magnetic levitation rotor"

Fig.5

Single axial support structure and its equivalent magnetic circuit diagram"

Table 2

Basic parameters of axial magnetic levitation support"

参数数值
单边工作气隙x0/mm0.5
偏置磁感应强度B0/T0.6
计算最大承载力Fr /N134.8
最大电流Im /A3
磁极面积A/mm2100
线圈匝数Nc320

Fig.6

Position relationship between disk motor and magnetic levitation system"

Fig.7

Finite element simulation diagram of the influence magnetic field Br at the air gap"

Table 3

Br under different spacing L0"

L0/mm510152025
Br/T0.5350.3390.1450.0790.043

Fig.8

Br-L0 quadratic fitting curve"

Fig.9

Schematic diagram of the experimental device"

Fig.10

Schematic experimental platform"

Fig.11

Floating trajectory diagram at L0=10 mm"

Fig.12

Floating trajectory diagram at L0=15 mm"

Fig.13

Floating trajectory diagram at L0=20 mm"

Fig.14

Schematic diagram of the axial support of the magnetic levitation rotor"

Fig.15

Magnetic levitation rotor structure"

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