Control of Radial Force in Double Stator Type Bearingless Switched Reluctance Motor

Peng, Wei; Xu, Zhenyao; Lee, Dong-Hee; Ahn, Jin-Woo

doi:10.5370/jeet.2013.8.4.766

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The torque and levitation force are coupled when the windings are excited, which increases the control difficulty. Peng proposed a double-stator BSRM [74], in which the inner stator generates the levitation force and the outer stator generates the rotating torque. Compared with the conventional BSRM, this structure further separates the torque flux and the levitation force flux spatially, especially the mixing of the two fluxes rarely occurs in the stator.…”

Section: Bearingless Ssrmmentioning

confidence: 99%

A Review on Segmented Switched Reluctance Motors

Li²,

Zhang³

et al. 2022

Energies

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The switched reluctance motor (SRM) benefits from its magnet-free nature, robust construction, low cost, flexible controls, and the ability to operate in harsh environments such as high temperatures and high pressure. It has received increasing attention for all-electric or multi-electric aircraft systems and electric vehicles (EVs) as compared with permanent magnet synchronous motors (PMSM) and other AC motors in some required high reliability and fault tolerance applications. However, the SRM is prone to considerable wind resistance due to the convex pole structure of the rotor during high-speed rotation, high torque ripple, and also vibration noise. Thus, it is currently a trending topic to develop special SRMs, tailored with high reliability and fault tolerance. Recent research demonstrates several promising feasible solutions to reduce torque ripples and enhance torque density and power factors, including changing topology of SRM, using advanced control methods, as well as different winding configurations. Among these options, the segmented switched reluctance motor (SSRM), as a deformation of the conventional topology, is shown to be capable of effectively optimizing the torque performance. Motivated by this advance, this paper aims to present a comprehensive literature review on the SSRM, first illustrating the development of the topology of the SRM, then providing a description as well as a classification according to the topology of the SSRM. In particular, we focus on the evolution of various kinds of segmental topology and improvement measures. Then, we discuss the performance, advantages, and disadvantages of various types of structures in terms of their electromagnetic aspects and their applications. Eventually, several promising future trends and application prospects of the SSRM are prospected, with the aim of shedding light on further research. In sum, the key contribution of this paper is to provide a valuable basis for detailed analyses of the structure and electromagnetic design of the SSRM that are expected to benefit future research.

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Section: Bearingless Ssrmmentioning

confidence: 99%

A Review on Segmented Switched Reluctance Motors

Li²,

Zhang³

et al. 2022

Energies

Self Cite

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“…Structural decoupling eliminates and reduces the coupling of torque and levitation force by improving the motor structure, which reduces the control difficulty and ensures the reliability of the BSRM. With the continuous research in recent years the commonly used structural decoupling have divided into the following four categories: mixed stator tooth types such as the 12/14 pole mixed stator tooth BSRM proposed in the literature [14]; wide rotor tooth structures such as the new 16 phase BSRM proposed in the literature [13]; double stator structures such as the 12/8/4 pole DSBSRM proposed in the literature [15]; composite rotor structures such as the 12/8 pole single winding composite rotor BSRM proposed in the literature [16].…”

Section: Introductionmentioning

confidence: 99%

Design and Characteristic Analysis of a New Dual-Stator Bearingless Switched Reluctance Motor

Han

Sun

et al. 2022

IEEE Access

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This paper proposes a 18/15/6 pole dual-stator bearingless switched reluctance motor (DSBSRM) with better overall performance. The proposed motor separates the torque control system and the suspension control system with a magnetic isolation ring. The torque drive system adopts the method of optimizing the distribution and quantity of the stator and rotor tooth poles, which reduces the hysteresis force that exists during the commutation of the electromagnetic poles and improves the torque output capacity and the electromagnetic conversion efficiency. The suspension control system adopts hybrid excitation differential control method. This method increases the electromagnetic induction intensity of the suspension system at a small current and thus improves the levitation force output capability and control accuracy. The mathematical model of the 18/15/6 pole DSBSRM was established. The torque mathematical model adopts the Maxwell stress integral method after path optimisation, and the levitation mathematical model is established with full consideration of the rotor offset problem to ensure the accuracy of the mathematical model. Ansoft Maxwell 2D software was then used to simulate the 18/15/6 pole DSBSRM in 2D. While verifying the correctness of the mathematical model, the characteristics of the motor were analysed and the influence of key parameters such as control current and air gap thickness on the performance of the motor was analysed. In order to further highlight the excellent performance of 18/15/6pole DSBSRM. Compare 18/15/6 pole DSBSRM with new 16-phase BSRM and 12/8/4 pole DSBSRM. Structural decoupling method is used in all 3 motors. The results show that the proposed 18/15/6-pole DSBSRM has better performance in terms of torque and suspension output capacity and decoupling performance.INDEX TERMS BSRM; hybrid excitation; magnetic field decoupling; mathematical model; differential control; performance analysis.

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“…A bearingless motor consists of a magnetic bearing and a motor [19]. A double stator type bearingless switched reluctance motor consists of a magnetic bearing and a switched reluctance motor [20]. Thus, a Halbach magnetized PM generator and a magnetic bearing eliminating rotor gravity are combined in this paper.…”

Section: Introductionmentioning

confidence: 99%

Analytical Model of the Magnetic Field Distribution of a Generator Combined With Magnetic Bearing in Wind Turbines

Yu¹,

Xiang²,

Zhang³

et al. 2018

PIER B

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To achieve radial suspension and eliminate the effect of rotor gravity in wind turbines, a novel structure of a generator combined with a magnetic bearing (GCWMB) is proposed in this paper. The GCWMB not only has the characteristics of the traditional permanent magnet (PM) generator but also has the advantages of reducing friction and starting wind speed, eliminating rotor gravity. The structure and principle of the GCWMB are analyzed in this paper. To improve the calculation accuracy of flux density, an analytical model based on the Fourier series decomposition is proposed to establish the model of flux density in the outer air gap. Taking into account the edge effects and the eccentricity of the rotor, an improved equivalent magnetic circuit method is adopted to model and analyze the flux density in the inner air gap. The effectiveness and correctness of the proposed analytical model in the outer and inner air gaps are verified by finite element analysis (FEA) and experiments.

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Control of Radial Force in Double Stator Type Bearingless Switched Reluctance Motor

Cited by 7 publications

References 4 publications

A Review on Segmented Switched Reluctance Motors

A Review on Segmented Switched Reluctance Motors

Design and Characteristic Analysis of a New Dual-Stator Bearingless Switched Reluctance Motor

Analytical Model of the Magnetic Field Distribution of a Generator Combined With Magnetic Bearing in Wind Turbines

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