Internal Model Control for a Bearingless Permanent Magnet Synchronous Motor Based on Inverse System Method

Sun, Xiaodong; Shi, Zhou; Chen, Long; Yang, Zebin

doi:10.1109/tec.2016.2591925

Cited by 188 publications

(95 citation statements)

References 17 publications

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“…, (2) where z is the number of the stator slots, p is the number of PM pole pairs, and GCD(z, 2p) represents the greatest common divisors between z and 2p. In the proposed motor, z is equal to 36, and p is equal to 2.…”

Section: Optimization Of Cogging Torquementioning

confidence: 99%

“…In the proposed motor, z is equal to 36, and p is equal to 2. According to (2), it can be calculated that N p is equal to 1. According to Fig.…”

Section: Optimization Of Cogging Torquementioning

confidence: 99%

“…Bearingless motors which combine the function of conventional motors and magnetic bearings [1] have some remarkable advantages in the fields of special electric drives for the higher critical speed and lower cost [2,3]. Thus they are suitable for many high speed drive applications, such as flywheel energy storage, compressors, turbomolecular pumps and so on [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Sun

Chen

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In this paper, a new type of interior composite-rotor bearingless permanent magnet synchronous motors (BPMSMs) with two layer permanent magnets (PMs) is proposed. In order to reduce the torque ripple of this kind of motors, the sizes of PMs are optimized. Moreover, the magnetic field analysis of the interior composite-rotor BPMSM with two layer PMs is carried out by the finite element method (FEM). The corresponding static electronic magnetic characteristics at no load, including magnetic field, PM flux linkage and inductance, are studied in detail. In addition, electromagnetic torque characteristics and suspension force characteristics are also investigated thoroughly. The results of the analysis and simulation lay a significant foundation for further research on the interior composite-rotor BPMSMs with two layer PMs.Key words: bearingless motor, permanent magnet motor, finite element analysis, cogging torque, static electromagnetic characteristics.Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets In this paper, an interior composite-rotor BPMSM with two layer PMs is proposed. Then the electromagnetic characteristic of the proposed motor is analyzed by employing the finite element method (FEM) [20], which is used for the optimization of the motor. In Section 2, the suspension principle of proposed motor with two pole pairs of suspension windings and three pole pairs of suspension windings is introduced. In Section 3, the process of optimization based on the size of permanent magnets (PMs) is proposed, as well as the principle of optimization reducing the cogging torque and increasing the suspension force. In Section 4, the finite element model, plot mesh and prototype parameters are presented. Then the basic electromagnetic characteristics at no load including PM flux linkage, magnetic field and inductance of the proposed machine are analyzed. In Section 5, the electromagnetic characteristics are investigated. In Section 6, the suspension force characteristics are analyzed. Finally, Section 7 summarizes the paper. Suspension principleFor generating the suspension force and electromagnetic torque simultaneously, in the BPMSMs, the torque windings and suspension windings are wound together in the same stator slots. Suppose the pole pair number and current frequency of torque windings is P T and ω T . The pole pair number and current frequency of

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Section: Optimization Of Cogging Torquementioning

confidence: 99%

“…In the proposed motor, z is equal to 36, and p is equal to 2. According to (2), it can be calculated that N p is equal to 1. According to Fig.…”

Section: Optimization Of Cogging Torquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Sun

Chen

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The basic principle of inverse system method is to compensate the controlled object as a system with a linear transfer relationship by using the inverse system of the controlled object, then, to synthesize the system according to the linear system theory, and to realize the decoupling in nonlinear systems [24,25]. The necessary and sufficient condition for the system to be reversible in the neighborhood of ( 0 , 0 ) has vector relative order = ( 1 , 2 , . .…”

Section: Smvs Radial Suspension Force Control Of the Bim Based On Invmentioning

confidence: 99%

A Bearingless Induction Motor Direct Torque Control and Suspension Force Control Based on Sliding Mode Variable Structure

Yang

Chen

Sun

et al. 2017

Mathematical Problems in Engineering

Self Cite

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Aiming at the problems of the large torque ripple and unstable suspension performance in traditional direct torque control (DTC) for a bearingless induction motor (BIM), a new method of DTC is proposed based on sliding mode variable structure (SMVS). The sliding mode switching surface of the torque and flux linkage controller are constructed by torque error and flux error, and the exponential reaching law is used to design the SMVS direct torque controller. On the basis of the radial suspension force mathematical model of the BIM, a radial suspension force closed-loop control method is proposed by utilizing the inverse system theory and SMVS. The simulation models of traditional DTC and the new DTC method based on SMVS of the BIM are set up in the MATLAB/Simulink toolbox. On this basis, the experiments are carried out. Simulation and experiment results showed that the stable suspension operation of the BIM can be achieved with small torque ripple and flux ripple. Besides, the dynamic response and suspension performance of the motor are improved by the proposed method.

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“…[6][7][8][9][10]. The bearingless motor is a new type of AC motor that is suitable for highspeed operations, which is proposed based on the comparability in structure between the magnetic bearing and the stator of a conventional AC motor [11][12][13][14][15]. Apart from some special bearingless motors with single windings [16,17], in a common bearingless motor, there are two sets of windings in the stator slots, including a set of torque winding (with pole-pair number p 1 and current angular frequency ω 1 ) and a set of suspension winding (with pole-pair number p 2 and current angular frequency ω 2 ) [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Sliding mode variable structure control strategy of bearingless induction motor based on inverse system decoupling

Zhang

2018

IEEJ Transactions Elec Engng

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A bearingless induction motor is a multivariable, nonlinear and strong coupling object. To achieve its dynamic decoupling control with high performance and improve the system stability, a sliding mode variable structure (SMVS) control strategy based on inverse system decoupling is proposed. First, taking the stator current as the control variable, by means of inverse system method, the bearingless induction motor system is decoupled into four pseudolinear subsystems, including motor speed subsystem, rotor flux‐linkage subsystem and two radial displacement component subsystems. Then, according to the SMVS control theory, the regulator is designed for each subsystem. To overcome the chattering problem of the system, an exponential reaching law is introduced to the SMVS regulator; based on Lyapunov theory, system stability is analyzed. From the simulation experimental results, it is clear that the system has better dynamic decoupling control performance, a stronger ability to resist load disturbance and stronger robustness to the variation of motor parameters. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Internal Model Control for a Bearingless Permanent Magnet Synchronous Motor Based on Inverse System Method

Cited by 188 publications

References 17 publications

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

A Bearingless Induction Motor Direct Torque Control and Suspension Force Control Based on Sliding Mode Variable Structure

Sliding mode variable structure control strategy of bearingless induction motor based on inverse system decoupling

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