Modeling, Analysis, and Testing of a Novel Spoke-Type Interior Permanent Magnet Motor With Improved Flux Weakening Capability

Tessarolo, Alberto; Mezzarobba, Mario; Menis, R.

doi:10.1109/tmag.2014.2357225

Cited by 49 publications

(17 citation statements)

References 26 publications

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“…For the topology of BPMSM, same as the PMSM, it can be categorized into surface-mounted permanent magnet synchronous motor (SBPMSM) and interior permanent magnet synchronous motor (IBPMSM). Compared with the SBPMSM, the IBPMSM has high overload capacity and power density, and the speed adjustable range can be expended furtherly by using flux weakening control [17]- [21]. According to the difference of magnetization direction, the motor topologies of IBPMSM can be divided into tangential type, radial type, composed type, V-shape type and so on [22].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design and Performance Analysis for Interior Composite-Rotor Bearingless Permanent Magnet Synchronous Motors

Sun

2019

IEEE Access

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The bearingless permanent magnet synchronous motor (BPMSM) is widely developed due to the advantages such as high speed, high power factor, high power density, and zero friction. In this paper, in order to provide more space for the placement of a permanent magnet (PM), a new type of BPMSM with interior composed magnetic structure is designed. The operation principles of the proposed BPMSM with the Maxwell force are introduced first. Then, by using of the finite element method (FEM), the pole-arc coefficient of BPMSM is optimized to reduce the cogging and increase the levitation force. In addition, the electromagnetic properties including magnetic field, levitation force, electromagnetic torque, loss, and cogging torque are simulated and analyzed. Finally, the static levitation experiment is carried out to verify the performance of levitation force. The research lays a foundation for further research about optimal design of the new type of BPMSM and also provides a mathematical model foundation for research of the control system. INDEX TERMS BPMSM, FEM, optimal design, Maxwell force, electromagnetic performance.

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Section: Introductionmentioning

confidence: 99%

Optimal Design and Performance Analysis for Interior Composite-Rotor Bearingless Permanent Magnet Synchronous Motors

Sun

2019

IEEE Access

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“…Due to small size, no contact, no wear, no lubrication, high efficiency, the BPMSMs are highly valued around the world, especially in semiconductor, pharmaceutical and medical industry [11,12]. Comparing with other types of BPMSMs, the interior BPMSMs (IBPMSMs) generating both electromagnetic torque and reluctance torque can improve the power density of motors [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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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“…The other type increases magnet torque by adopting a flux-concentrating rotor structure, e.g. a spoke-type rotor, which has a rectangular shape and tangentially magnetised magnets in the rotor that produce a higher airgap flux density than conventional IPM motors [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Some approaches change a normal rectangular magnet (RM) to another shape, e.g.…”

Section: Introductionmentioning

confidence: 99%

Performance comparison of a spoke‐type PM motor with different permanent magnet shapes and the same magnet volume

Jun

Kwon

2017

IET Electric Power Applications

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This study investigates the characteristics of a spoke-type permanent magnet (PM) motor with one of three magnet shapes, rectangular magnet (RM), trapezoidal magnet (TM), or inverted TM (ITM) in order to compare motor performance for the same magnet volume. The three magnet shapes vary in terms of upper thickness, lower thickness, and width of the magnet. Two-dimensional (2D) finite element method is performed to analyse torque, inductance, core loss, efficiency, and demagnetisation reliability. Advantages and disadvantages of each magnet shape are presented based on the analysis results. The ITM motor shows higher efficiency at its rated load due to the reduced core loss resulting from the decreased armature reaction field coupled with the increased magnetic reluctance circuit of the rotor near the airgap. However, the ITM motor shows lower maximum torque due to the reduced reluctance torque and demagnetisation reliability with a heavy over-current. ITM is thus suitable for applications that require low core loss with small starting torque, e.g. fans, TM is helpful for increasing maximum torque, and RM is appropriate for lowcost applications that require high demagnetisation reliability. Therefore, magnet shape should be carefully considered based on the required specifications of the motor application.

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Modeling, Analysis, and Testing of a Novel Spoke-Type Interior Permanent Magnet Motor With Improved Flux Weakening Capability

Cited by 49 publications

References 26 publications

Optimal Design and Performance Analysis for Interior Composite-Rotor Bearingless Permanent Magnet Synchronous Motors

Optimal Design and Performance Analysis for Interior Composite-Rotor Bearingless Permanent Magnet Synchronous Motors

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

Performance comparison of a spoke‐type PM motor with different permanent magnet shapes and the same magnet volume

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