Continuously Variable Speed Vernier Magnetic Gear

Zaini, Ariff; Niguchi, Noboru; Hirata, Katsuhiro

doi:10.1109/tmag.2012.2196505

Cited by 22 publications

(14 citation statements)

References 6 publications

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“…That said, the reduction ratio can be freely changed like a planetary gear by appropriately rotating these three components. Magnetic continuously variable transmissions (magnetic CVT) that use this technique have been proposed . However, there have been no reports on magnetic‐geared motors in which the reduction ratio can be controlled.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic‐geared motor with a continuously variable transmission gear ratio and its control method

Morimoto

Niguchi

Hirata

2018

Elect Comm in Japan

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Magnetic‐geared motors have attracted considerable attention because of their high‐torque density. However, the gear ratio of a magnetic‐geared motor depends on the number of poles in the rotor, which is fixed during operation. In this paper, a magnetic‐geared motor with a continuously variable transmission gear ratio and its control method are proposed. The structure and operational principle of the proposed motor are described. The N–T curve and efficiency are computed and measured using a prototype, and the computed and measured characteristics are compared.

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Section: Introductionmentioning

confidence: 99%

“…Magnetic continuously variable transmissions (magnetic CVT) that use this technique have been proposed. [5][6][7] However, there have been no reports on magnetic-geared motors in which the reduction ratio can be controlled.…”

Section: Introductionmentioning

confidence: 99%

Magnetic‐geared motor with a continuously variable transmission gear ratio and its control method

Morimoto

Niguchi

Hirata

2018

Elect Comm in Japan

Self Cite

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“…One of the most known MGB configurations is the coaxial planetary MGB [9,10]. A body of research has been conducted in the development of this gear topology [11,12]. Another promising topology is the axial MGB [13,14].…”

Section: Introductionmentioning

confidence: 99%

Cogging torque reduction of axial magnetic gearbox using pole pairing technique

Zaytoon

Abdel‐Khalik

Ahmed

et al. 2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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Magnetic gearbox (MGB) becomes an attractive research topic in mechanical transmission as it offers significant advantages over mechanical gears such as contactless power transfer, high gear ratios, inherent overload protection, high torque density, and maintenance free. However, the main design problem of magnetic systems is the cogging torque originated from high strength permanent magnets (PM), which causes additional vibrations and acoustic noise. Therefore, cogging torque mitigation is a crucial problem in MGB design. This paper introduces a new technique for torque ripple reduction in axial MGB using the pole pairing technique, which is usually applied for torque ripple mitigation in conventional PM machines. A conventional 16/4 axial MGB, which normally results in a significant cogging torque magnitude, is designed and the pole pairing technique is applied to both high and low speed rotors in opposite manner. The 3D finite-element analysis (FEA) confirms the effectiveness of this method and the optimum pairing angles are determined for optimum torque profiles for both high and low speed rotors.

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“…References [1]- [3] describe magnetic gears which employ magnetic flux harmonics and reference [4] compares the topology of these magnetic gears. Reference [5] describes a magnetic gear which has a continuously variable speed. References [6] and [7] propose magnetic gears based on mechanical cycloid gear and harmonic gear, respectively.…”

Section: Introductionmentioning

confidence: 99%