Design of Surface Permanent Magnet-type Vernier Motor

Kakihata, Hironori; Kataoka, Yasuhiro; Takayama, M.; Matsushima, Yoshitarou; Anazawa, Yoshihisa

doi:10.11142/jicems.2013.2.2.127

Cited by 18 publications

(7 citation statements)

References 5 publications

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“…A cross-sectional area of teeth, which face the gap, is proportional to the rotor radius; therefore, the gap permeance increases 1.5-fold. However, the permeance for the zigzag leakage flux is inversely proportional to the rotor radius [8]. Therefore, a 1.7-fold increase is obtained for the magnet thicknesses 3, 6, and 10 mm.…”

Section: Characteristics Of the Induced Electromotive Forcementioning

confidence: 94%

“…The currents on the γ and δ axis, given in equations (7) and (8), are obtained by transforming equations (4) and (5), respectively. The γ-δ axis torque equation is given in equation (9): where , , and I γ is the current on the γ axis (A).…”

Section: γ-δ Axis Torque Equationmentioning

confidence: 99%

“…For the parallel magnetized array type, the synchronous reactance x s of magnet thickness 3 mm increases from 5.3 to 6.5 Ω (a 1.2-fold increase), when the rotor radius is increased 1.5-fold. Though the permeance in the gap increases, the permeance in the slot decreases depending on the rotor radius increase, because the slot width is increased [8].…”

Section: Characteristics Of the Synchronous Reactancementioning

confidence: 99%

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Comparison of Three Magnet Array-type Rotors in Surface Permanent Magnet-type Vernier Motor

Kataoka

Takayama

Matsushima

et al. 2013

Journal of international Conference on Electrical Machines and

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-Surface permanent magnet-type vernier motors with three magnet array-type rotors (parallel magnetized type, repulsion type, and Halbach type) are compared based on the pull-out torque. It was clarified that increasing the rotor radius increases the pull-out torque at a fixed three-phase alternating voltage. The mechanism for the pull-out torque increase on each magnet array type was different, when the effects of the increase were analyzed based on an induced electromotive force and a synchronous reactance. As a result, the design of the Halbach-type rotor was found to be especially effective for achieving high pull-out torque, because this array type achieves a large induced electromotive force E 0 and a small synchronous reactance x s .

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Section: Characteristics Of the Induced Electromotive Forcementioning

confidence: 94%

Section: γ-δ Axis Torque Equationmentioning

confidence: 99%

Section: Characteristics Of the Synchronous Reactancementioning

confidence: 99%

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Comparison of Three Magnet Array-type Rotors in Surface Permanent Magnet-type Vernier Motor

Kataoka

Takayama

Matsushima

et al. 2013

Journal of international Conference on Electrical Machines and

Self Cite

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“…Thus, the equivalent circuit and power equation of the VPM machine are similar to those of the PM synchronous machine but with the load angle modified by a factor of the number of rotor PM pole-pairs (51).…”

Section: Vernier-pm Machinementioning

confidence: 99%

Permanent‐Magnet Machines

Chau

2015

Wiley Encyclopedia of Electrical and Electronics Engineering

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Being fueled by continual development of permanent‐magnet (PM) materials and machine structures, PM machines are becoming attractive for a wide range of applications. In this article, the magnet‐materials that have been used for PM machines are first introduced. Then, the classification of various PM machines is discussed. Consequently, major PM machines are described, with emphasis on their machine structures and operating principles. Also, the corresponding variants due to morphological changes are discussed. Finally, a quantitative evaluation of those viable PM machines is given to identify their prospects and potential applications.

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“…For the sake of high torque development at low speed, various topologies of electric machines have been proposed (Kakihata et al , 2013; Oner et al , 2016; Yang et al , 2014; Liu et al , 2018; Du et al , 2014). In conventional electric machines, this feature can be achieved through the higher number of pole-pairs, which makes the electric machine bulkier and heavier, and its feasibility depends on the machine configuration (Yang et al , 2018; Niu et al , 2014).…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional analytical model for five-phase fault-tolerant permanent-magnet vernier machines

Mirzavand

Rahideh

2022

COMPEL

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Purpose This study aims to extract an analytical model for five-phase fault-tolerant permanent-magnet vernier machines (FTPMVMs) based on the analytical solution of Maxwell’s equations, which has some advantages than the finite element model. Design/methodology/approach FTPMVMs enhance the torque density by combining the vernier characteristics and the fault-tolerant feature. The principle operation of FTPMVMs is discussed based on the magnetic field modulation due to both permanent magnets and armature current. The analytical solution of the magnetic vector potential in each sub-region is obtained based on the sub-domain technique. Findings According to the calculated magnetic vector potential, the magnetic flux density, torque, self- and mutual inductance and back-electromotive force are calculated. The FEM is used to validate the results obtained from the proposed analytic model. Originality/value Two-dimensional analytical method is used to obtain the electromagnetic model of FTPMVMs.

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Design of Surface Permanent Magnet-type Vernier Motor

Cited by 18 publications

References 5 publications

Comparison of Three Magnet Array-type Rotors in Surface Permanent Magnet-type Vernier Motor

Comparison of Three Magnet Array-type Rotors in Surface Permanent Magnet-type Vernier Motor

Permanent‐Magnet Machines

Two-dimensional analytical model for five-phase fault-tolerant permanent-magnet vernier machines

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