Improved analysis of a bearingless switched reluctance motor

Takemoto, Mikio; Suzuki, Hironori; Chibá, Akira; Fukao, T.; Rahman, M.A.

doi:10.1109/iemdc.1999.769238

Cited by 18 publications

(29 citation statements)

References 8 publications

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“…Neglecting the leakage flux and saturation effects, the theoretical formulae of the torque and radial forces can be derived from the derivatives of the stored magnetic energy with respect to displacements and and rotor position as [17].…”

Section: Mathematical Model Of Dual-winding Bsrmmentioning

confidence: 99%

“…Regarding the control of dual-winding BSRM, the typical method is square-wave current control proposed by Takemoto et al In [14,15], the square-wave current control has realized the stable operation of dual-winding BSRM from no load to full load, and the influences of magnetic saturation and coupling effects on the torque and radial force are considered [16,17]. Furthermore, an independent control strategy of average torque and radial force was presented [18].…”

Section: Introductionmentioning

confidence: 99%

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Decoupling Control for Dual-Winding Bearingless Switched Reluctance Motor Based on Improved Inverse System Method

Zhu

Sun

Yuan

2017

Mathematical Problems in Engineering

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Dual-winding bearingless switched reluctance motor (BSRM) is a multivariable high-nonlinear system characterized by strong coupling, and it is not completely reversible. In this paper, a new decoupling control strategy based on improved inverse system method is proposed. Robust servo regulator is adopted for the decoupled plants to guarantee control performances and robustness. A phase dynamic compensation filter is also designed to improve system stability at high-speed. In order to explain the advantages of the proposed method, traditional methods are compared. The tracking and decoupling characteristics as well as disturbance rejection and robustness are deeply analyzed. Simulation and experiments results show that the decoupling control of dual-winding BSRM in both reversible and irreversible domains can be successfully resolved with the improved inverse system method. The stability and robustness problems induced by inverse controller can be effectively solved by introducing robust servo regulator and dynamic compensation filter.

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Section: Mathematical Model Of Dual-winding Bsrmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decoupling Control for Dual-Winding Bearingless Switched Reluctance Motor Based on Improved Inverse System Method

Zhu

Sun

Yuan

2017

Mathematical Problems in Engineering

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“…where ( ) is a proportional coefficient of radial force; it is a function of the rotor position angle and the dimensions of BSRM [14][15][16][17].…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Design and Characteristic Analysis of a Novel Bearingless SRM considering Decoupling between Torque and Suspension Force

Yan

Liu

Deng

et al. 2014

Mathematical Problems in Engineering

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A Bearingless Switched Reluctance Motor (BSRM) has a complicated character of nonlinear coupling; therefore, it is a hard work to operate BSRM stably. In this paper, a new type of BSRMs with novel rotor structure is proposed by analyzing relationships between motor structure and theoretical formulae of levitation force and torque. The stator structure of this new motor is same as that of traditional BSRM and each stator pole can coil one winding or two windings, while the pole arc of rotor is wider. In order to analyze the characteristics of the proposed BSRM, finite-element (FE) models are used and a 12/4 one-set-winding BSRM and a 12/8 two-sets-windings BSRM are taken as examples. The analysis results indicate that the new scheme is effective for a stable levitation. It can realize decoupling control of torque and radial force, thus simplifying its control strategy and improving the use ratio of winding currents. A control system is designed for the 12/8 BSRM based on deducing its mathematical model. Compared with traditional BSRM, the proposed scheme is easier to be implemented.

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“…However, due to the operating principle of BSRM, there is a control coupling problem between torque and suspension force, which reduces the controllability of BSRM and increases power consumption. To realize the stable operation of BSRM, a complicated control algorithm must be designed . However, BSRM is a highly complex nonlinear system ; algorithm decoupling is not only costly, but also the reliability is difficult to be guaranteed .…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a 16/6 Bearingless Switched Reluctance Motor with Segment Hybrid Rotor Teeth

Sun

Zhuang

et al. 2020

IEEJ Transactions Elec Engng

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In this article, a 16/6 bearingless switched reluctance motor (BSRM) with segment hybrid rotor teeth has been presented. To realize the decoupling control of torque and suspension force, the rotor teeth were divided into three torque teeth and three suspension teeth, and both of them are embedded in support part. First, both torque and suspension force are generated by short-circuit excitation, the flux linkage coupling between torque windings and suspension windings was eliminated, and the separate control of torque and suspension force was achieved. Then, by increasing the pole arc of suspension teeth, the inductance of suspension windings is kept constant, which eliminates the influence on the output torque when adjusting suspension force. Finally, the coupling degree is further reduced by using nonmagnetic material as the supporting part. In addition, to achieve a greater output torque, the torque teeth are processed into U-shape and optimized the pole arc of stator teeth and rotor teeth. The characteristics of inductance, flux linkage, and output torque are analyzed by the finite-element method, and the results show that the proposed structure basically achieves the decoupling control of torque and suspension force. (Non-member) was born in 1996, Rizhao, China.He received the B.S. degree in measurement and control technology and instrument from Shandong University of Science and Technology. His research interests include magnetic suspension artificial heart, precision instrumentation design, and system control.Jingkai Li (Non-member) was born in 1990, Zaozhuang, China. He graduated in measurement and control technology and instrument from Shandong University of Science and Technology. He is currently pursuing the M.S. degree in system control and automation instrumentation. His research interests include magnetic suspension artificial heart, magnetic suspension control system and sensorless detection of bearingless switched reluctance motor.Jiaqing Li (Non-member) was born in 1996, Jining, China.He received the B.S. degree in mechanical design manufacture and automation major from Zaozhuang University, and he is currently pursuing the M.S. degree in mechanical engineering. His research interests include advanced manufacturing technology and precision instrumentation.

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Improved analysis of a bearingless switched reluctance motor

Cited by 18 publications

References 8 publications

Decoupling Control for Dual-Winding Bearingless Switched Reluctance Motor Based on Improved Inverse System Method

Decoupling Control for Dual-Winding Bearingless Switched Reluctance Motor Based on Improved Inverse System Method

Design and Characteristic Analysis of a Novel Bearingless SRM considering Decoupling between Torque and Suspension Force

Design and Analysis of a 16/6 Bearingless Switched Reluctance Motor with Segment Hybrid Rotor Teeth

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