A Novel Claw Pole Motor With Soft Magnetic Composites

Wei, Du; Zhao, Sheng; Zhang, Haixia; Zhang, Mimi; Gao, Jingzhou

doi:10.1109/tmag.2020.3019830

Cited by 17 publications

(5 citation statements)

References 6 publications

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“…SMC is featured with high saturation magnetization, low eddy current loss and density, which can increase the electromagnetic load during motor design and thus reduce motor volume [38,39]. Additionally, due to the isotropic magnetic and thermal properties of SMC, some novel motor topologies with 3D magnetic circuits can be realized, thereby improving material utilization and reducing motor mass [40].…”

Section: Soft Magnetic Compositementioning

confidence: 99%

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

Zhao,

Li,

Zhang

et al. 2024

Machines

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The demand for high-power density motors has been increasing due to their remarkable output capability and compact construction. To achieve a significant improvement in motor power density, lightweight design methods have been recognized as an effective enabler. Therefore, extensive investigations have been conducted to reduce motor mass and achieve lightweight configurations through the exploration of lightweight materials, structures and manufacturing techniques. This article provides a comprehensive review and summary of state-of-the-art lightweight implementation methods for electrical machines, including the utilization of lightweight materials, structural lightweight design, and incorporation of advanced manufacturing technologies, such as additive manufacturing techniques. The advantages and limitations of each approach are also discussed in this paper. Furthermore, some comments and forecasts on potential future methodologies for motor lightweighting are also provided.

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Section: Soft Magnetic Compositementioning

confidence: 99%

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

Zhao,

Li,

Zhang

et al. 2024

Machines

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“…Indeed, the PM flux is regarded as a second source of excitation as far as it is higher than the claw-to-claw linkage flux. An attempt to reduce the third limitation has been proposed in several works [17], [18]. It consists in substituting the solid iron rotor magnetic circuit by a soft magnetic composite made one.…”

Section: Introductionmentioning

confidence: 99%

3D Rotor Position-Dependant MEC Modeling of Different Claw Pole Machine Topologies

2022

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The paper is aimed at a 3D magnetic equivalent circuit (MEC)-based modelling of claw pole synchronous machine topologies. Beyond the magnetic saturation and the armature magnetic reaction, the proposed modelling approach takes into consideration the rotor position variation, yielding the socalled: rotor position-dependant MEC. Accounting for the complexity of the magnetic circuit of claw pole topologies, specific assumptions are adopted prior a general analytical derivation of their MEC models. The developed analytical approach focuses on the air gap reluctance under variable rotor position considering a simplified geometry of the claw. A dedicated numerical procedure based on the Newton-Raphson algorithm is proposed for the resolution of the designed rotor position-dependant MEC. The proposed approach is applied to three claw pole topologies. The two first ones are equipped with a single source of excitation achieved by a field. Their analytically-predicted features are validated by experiments. The third topology has a dual excitation achieved by a field and permanent magnets (PMs) in the rotor. Its analyticallypredicted features are validated by 3D finite element analysis (FEA). It is found that both experimental and FEA results are in quite good agreement with the analytical predictions yielded by the proposed rotor position-dependant MEC.INDEX TERMS Armature magnetic reaction, claw pole topologies, magnetic saturation, no-/on-load features, rotor position-dependant magnetic equivalent circuit, single/dual excitation, three dimensional finite element analysis.

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“…Jae-Han Sim et al [35] proposed an infinitesimal hexahedron-element-based 3D equivalent magnetic circuit network method in order to estimate the performance of the PM-assisted claw pole synchronous motor. In addition, some scholars [36,37] have analyzed the characteristics of the permanent magnet materials used in motors. Considering that many magnetic circuit equations are based on the assumption that the default permanent magnet is completely magnetized, but the actual permanent magnet is not completely magnetized [38], by analyzing the magnetization process, the magnetic properties of incompletely magnetized magnets were studied.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Detent Torque and Holding Torque of a Micro-Claw Pole Stepper Motor

Sun

Wang

et al. 2022

Micromachines

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The micro-claw pole stepper motor is widely used in the field of camera modules and VR focusing. The influence of torque ripple on positioning accuracy becomes more obvious with a decrease in motor volume. In order to reduce the torque ripple of the micro-claw stepper motor and increase the load capacity of the motor, the torque of the motor is simulated by using finite element software. Firstly, the influences of four parameters, namely air gap, magnet thickness, claw thickness and claw height, on the detent torque and holding torque of the claw permanent magnet stepper motor are obtained through the Taguchi experiment. The Signal-to-noise ratio (SNR) of each factor to the response was calculated and the degree of influence of the four parameters on the detent torque and holding torque of the micro-claw pole permanent magnet stepper motor was determined. Then, the optimal value of each factor to reduce the detent torque and increase the holding torque was obtained through optimization analysis. Finally, experiments were carried out to test the holding torque of the motor, and the accuracy of the results was verified by comparing the test values with the simulation values. According to the analysis of the paper, the response delta of air gap to detent torque is the largest, reaching 5.99, and that to holding torque is 0.73. The response delta of the magnet thickness to the detent torque is 5.87, and the response delta to the holding torque is 1.52. The optimized parameters obtained by optimization analysis reduce the detent torque of the motor by 26.74% and increase the holding torque by 18.35%. It is found that air gap and permanent magnet thickness have the greatest influence on the detent torque and holding torque of a micro-claw permanent magnet stepper motor, followed by claw thickness and claw height. Among them, the air gap has more influence on the detent torque than on the holding torque, and the thickness of the permanent magnet has more influence on the holding torque than on the detent torque.

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A Novel Claw Pole Motor With Soft Magnetic Composites

Cited by 17 publications

References 6 publications

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

State-of-the-Art Lightweight Implementation Methods in Electrical Machines

3D Rotor Position-Dependant MEC Modeling of Different Claw Pole Machine Topologies

A Study on the Detent Torque and Holding Torque of a Micro-Claw Pole Stepper Motor

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