The Study of Switched Reluctance Motor for 4-DOF Bearingless Motor

Yuan, Ye; Sun, Yanchao; Xiang, Qianwen; Ren, Yuan; Liu, Qiang

doi:10.1007/s42835-018-00051-3

Cited by 11 publications

(7 citation statements)

References 17 publications

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“…Based on the structural characteristics, four types can be distinguished: mixed stator tooth structure, wide rotor tooth structure, double-stator structure, and composite rotor structure [5][6][7][8][9][10][11]. e dual stator structure, with the outer stator winding providing the torque and the inner stator winding providing the levitation, provides better decoupling and easier control by separating the torque and levitation force magnetic circuits [10,[12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

Sun

Yang

Han

et al. 2021

Mathematical Problems in Engineering

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The 16/6/8 double-stator bearingless switched reluctance motor (DSBSRM) is used as the object of study in this paper. To solve the problem of torque and levitation force ripples in this motor, a control system direct force control (DFC) and direct instantaneous torque control (DITC) based on the torque sharing function (TSF) are proposed. With the strong nonlinearity and approximation capability of radial basis function neural networks, the torque and levitation force observer are designed. The observed torque and levitation forces are used as feedback for the internal loop control, which is combined with the external loop control to make a double closed-loop control. In order to further improve the output torque and system robustness and suppress the torque ripple in steady-state process, the motor winding method is optimized and a set of switching angles is added on the basis of TSF. The simulation results verify the effectiveness and superiority of the proposed control method. It effectively suppresses speed ripple and reduces torque and levitation force fluctuations and rotor radial displacement jitter.

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Section: Introductionmentioning

confidence: 99%

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

Sun

Yang

Han

et al. 2021

Mathematical Problems in Engineering

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“…A 12/8 pole single winding BSRM was studied by Yuan et al . [2, 3], an 8/6 pole BSRM was introduced by Chen and Hofmann [4], an 8/10 hybrid pole BSRM was proposed by Wang et al . [5], a 12/14 hybrid pole BSRM was proposed by Xu et al .…”

Section: Introductionmentioning

confidence: 99%

“…Many different types of bearingless SRM (BSRM) have been proposed. A 12/8 pole single winding BSRM was studied by Yuan et al [2,3], an 8/6 pole BSRM was introduced by Chen and Hofmann [4], an 8/10 hybrid pole BSRM was proposed by Wang et al [5], a 12/14 hybrid pole BSRM was proposed by Xu et al [6], and a 12/12 BSRM was proposed in [7]. However, the above BSRMs had the deficiencies of strong coupling and low torque density.…”

mentioning

confidence: 99%

Suspension performance analysis of a novel bearingless motor

Yuan

Guo

et al. 2020

Electron. lett.

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Biased magnetic flux produced by a permanent magnet can reduce the power consumption of the suspension system in bearingless motors or magnetic bearings. However, the ability to generate suspension biased magnetic flux with a single permanent magnet tends to be saturated with the increase of the magnetising width. In order to solve the above problem, an axially superposed permanent magnet biased bearingless motor, which consists of a 12/8 reluctance motor for producing torque and two permanent magnets for producing desired biased magnetic flux density is present. The structure and working principle are introduced, and the electromagnetic characteristics are analysed by finite element analysis. The results verify that the proposed bearingless motor has the excellent merits of weak coupling between the torque system and suspension force and satisfactory suspension performance. Furthermore, much more biased permanent magnets could also be used for the suspension system of ultra-high speed, high power and slender bearingless motors such as flywheel energy storage systems.

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“…However, the present motors both have the inherent shortcomings of electromagnetic strong coupling between torque system and suspension system, which brings severe challenges to high performance control. To reduce the coupling between the systems and improve the controllability of the BSRM, an asymmetry BSRM (ABSRM) in [7] was proposed. However, the suspension force ripple is obvious with the change of rotor position.…”

Section: Introductionmentioning

confidence: 99%

Full‐period suspension force accurate modelling for a novel bearingless switched reluctance motor

Yuan

et al. 2019

Electron. lett.

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In the traditional bearingless switched reluctance motor (BSRM) system, the electromagnetic coupling between the torque system and suspension system is unavoidable. In this Letter, the present BSRM has the advantages of electromagnetic decouple with independent torque-suspension magnetic circuit design. However, the further in-depth study shows that the BSRM has an obvious suspension force fluctuation according to its asymmetry structure. Thus, it is necessary to build an accurate suspension force mathematical model considering commutation ripple. In this frame, a magnetic field segmentation method is proposed and the accurate suspension force model is built with Maxwell stress method and its reliability and precision are verified, modified based on finite element analysis.

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The Study of Switched Reluctance Motor for 4-DOF Bearingless Motor

Cited by 11 publications

References 17 publications

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

Suspension performance analysis of a novel bearingless motor

Full‐period suspension force accurate modelling for a novel bearingless switched reluctance motor

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