Theory and Torque Characteristics of PM Vernier Motor.

Ishizaki, Akira; Tanaka, Takeshi; Takasaki, Kazuhiko; Nishikata, Shoji; Katagiri, Atsuo

doi:10.1541/ieejias.113.1192

Cited by 17 publications

(2 citation statements)

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“…Iron loss Pi occurs over the entire motor, but more iron loss occurs in the core near the airgap where the change in magnetic flux density is remarkable. Then, the magnetic flux density of the airgap in equations ( 1) and ( 2) is developed as a theoretical equation from the permanent magnet magnetomotive force Fmr and the gap permeance Pg (16) .…”

Section: Relationship Between the Magnetic Flux Density Of The Airgap And Magnetic Wedgesmentioning

confidence: 99%

Effect of Magnetic Wedge Characteristics on Torque Ripple and Loss in Interior Permanent Magnet Synchronous Motor

Horiuchi

Masuda

et al. 2022

IEEJ Journal IA

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An interior permanent magnet synchronous motor (IPMSM) is characterized by high efficiency in a wide range of applications. However, when operating at high speeds, torque ripple and rotor loss occur because of the spatial harmonics generated by fluctuations in the airgap permeance. This study demonstrates the suppression of torque ripple and harmonic loss by magnetic wedges using finite element analysis (FEA). First, the authors examined the torque and loss characteristics by varying the slot opening width and relative permeability of the magnetic wedge. Results indicate that the torque ripple can be suppressed even if the opening width is widened to half the slot pitch. However, this improvement effect saturates when the relative permeability of the magnetic wedge becomes larger than r = 10. Furthermore, the authors confirmed the effect of the magnetic wedge by visualizing the harmonic components of the eddy current loss. The findings reveal that the eddy current loss represents a trade-off between the stator and rotor when using the magnetic wedge.

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Section: Relationship Between the Magnetic Flux Density Of The Airgap And Magnetic Wedgesmentioning

confidence: 99%

Effect of Magnetic Wedge Characteristics on Torque Ripple and Loss in Interior Permanent Magnet Synchronous Motor

Horiuchi

Masuda

et al. 2022

IEEJ Journal IA

View full text Add to dashboard Cite

show abstract

“…Then, the rotor synchronizes with the 5th wave, because rotor has 10 poles. The synchronous speed N is denoted by (2), where f is the frequency, because the rotor rotates at P/R times the speed of the rotating magnetic field generated by the armature coil. So, the SPM-type vernier motor can realize super slow speed rotation easily by increasing the number of poles of the rotor:…”

Section: Operating Principles Of An Spm-type Vernier Motormentioning

confidence: 99%