Modeling for Three-Pole Radial Hybrid Magnetic Bearing Considering Edge Effect

Zhu, Hui-ren; Shuling, Ding; Jv, Jintao

doi:10.3390/en9050345

Cited by 13 publications

(7 citation statements)

References 19 publications

(17 reference statements)

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“…In this way, a strong electromagnetic force is generated than the conventional magnetic circuit. The magnetic edge effect increases with the increase of the air gap [21,22]. These factors were considered during the design and fabrication of the magnetic bearing.…”

Section: Design Of Magnetic Bearingmentioning

confidence: 99%

Design and fabrication of a magnetic bearing using magnetic edge effect

et al. 2021

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This paper presents the design, fabrication, and performance test of a magnetic bearing employing no active components. In this study, the magnetic bearing was fabricated using a magnetic edge effect. Four large and three small hollow Neodymium (Nd) magnets were used of the same thickness, same internal diameter but different outer diameters. Small magnets were rigidly attached in the rotor and large magnets were fixed in the casing. In magnetic edge effects, a rotor along with small magnets was suspended inside the casing. Using stroboscope, rpm of the rotors were measured at no load, 0.5 N, 1.0 N, 1.5 N conditions for a different number of magnetic bearings in series, and the corresponding torque was calculated. After that, all the data were compared to the ball bearing set up in the same rotor. This paper shows that the speed of the magnetic bearing was doubled than the ball bearing with the same loading conditions. Required torque was 1.5 times greater in the case of ball bearing when compared to the magnetic bearing. The developed system is capable of suspending a rotor at a stable steady-state position. This suspension is accomplished by the edge effect of Nd round hollow magnets.

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Section: Design Of Magnetic Bearingmentioning

confidence: 99%

Design and fabrication of a magnetic bearing using magnetic edge effect

et al. 2021

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“…But the experiment of using the above method is difficult, and the cost is high. Besides, data observation is not flexible enough, and it is difficult to truly observe the influence of the HRHMB structural parameters optimization on the actual control [22][23][24][25][26][27]. In order to solve this problem, this paper proposes a method of Magnet-Simulink cosimulation.…”

Section: Introductionmentioning

confidence: 99%

Design and Cosimulation of Twelve-Pole Heteropolar Radial Hybrid Magnetic Bearing

Zhang

Duan

Cai

et al. 2021

Mathematical Problems in Engineering

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This paper presents a twelve-pole heteropolar radial hybrid magnetic bearing (HRHMB) structure. Firstly, the structure and equivalent magnetic circuit (EMC) are designed. And the radial electromagnetic force characteristics are calculated by the EMC model. At the same time, the rationality of EMC model is verified by the finite-element method (FEM) of Magnet software. Then, the 2-D model of the twelve-pole HRHMB is established in Magnet software. The flux density variations of twelve-pole HRHMB and eight-pole HRHMB under different currents are compared by using the FEM. Finally, a method of Magnet-Simulink cosimulation is proposed to analyze the suspension characteristics of the twelve-pole HRHMB and compared with the eight-pole HRHMB. Thus, the effective combination of theoretical analysis, FEM analysis, and Magnet-Simulink cosimulation analysis is realized in the design of HRHMB. The results of Magnet-Simulink cosimulation show that the twelve-pole HRHMB has the advantages of low power consumption, small coupling, large construction dynamic stiffness, and better suspension characteristics than the eight-pole HRHMB.

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“…Although the three-pole magnetic bearing has many advantages, it also increases the overall design difficulty and cost of the system in [5]. A new radial magnetic bearing structure and its working principle are introduced in this manuscript, and a parameter design method is put forward.…”

Section: Introductionmentioning

confidence: 99%

Principle and performance analysis for six‐pole hybrid magnetic bearing with a secondary air gap

Liu

Zhu

Zhang

2021

Electronics Letters

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In order to reduce the non-linearity of radial suspension forces of the three-pole hybrid magnetic bearing and further reduce the cost and power consumption, an AC six-pole hybrid magnetic bearing with secondary air gaps is proposed. First, the structure and working principle of the AC six-pole hybrid magnetic bearing with secondary air gaps are introduced, and the mathematical model of suspension forces are derived. Second, on the basis of the mathematical model, the linearity and coupling characteristics of the radial suspension forces are analysed, and then the suspension forces are simulated and verified by the finite element method (FEM). Then, the correlation performance indexes are compared with the six-pole hybrid magnetic bearing without secondary air gaps. Finally, an experimental platform is built, and suspension and disturbance tests are carried out. The research results show that the maximum bearing capacity of the six-pole hybrid magnetic bearing with secondary air gaps is 184% of the six-pole hybrid magnetic bearing without secondary air gaps.

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Modeling for Three-Pole Radial Hybrid Magnetic Bearing Considering Edge Effect

Cited by 13 publications

References 19 publications

Design and fabrication of a magnetic bearing using magnetic edge effect

Design and fabrication of a magnetic bearing using magnetic edge effect

Design and Cosimulation of Twelve-Pole Heteropolar Radial Hybrid Magnetic Bearing

Principle and performance analysis for six‐pole hybrid magnetic bearing with a secondary air gap

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