Cogging Torque and Torque Ripple in a Direct-Drive Interior Permanent Magnet Generator

Dutta, Rukmi; Ahsanullah, Kazi; Rahman, M.F.

doi:10.2528/pierb16072001

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…With a higher permeability and established preferable magnetic path, the machine inductance is increased. Moreover, oscillating torque profile is changed due to the greater spatial harmonic of airgap flux density [56].…”

Section: Problem Description and Evaluated Prototypementioning

confidence: 99%

Improved Semi-Analytical Magnetic Field Solution for High-Speed Permanent-Magnet Machines With Permeable Retaining Sleeve Including Diffusion Effect

Mendonça¹,

Maia²,

Filho³

2020

PIER B

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This work presents a novel semi-analytical model for magnetic field calculation in a highspeed surface-mounted permanent-magnet machine with conducting and permeable retaining sleeve. The retaining sleeve with conducting material and non-homogeneous permeability affects the machine electromagnetic performance by altering main flux inductance and developed torque profile. This performance deviation can be attributed to eddy-current reaction field and saturation, the latter occurring due to pole-to-pole leakage flux. Saturation is modeled with a space-varying relative permeability, expressed as a Fourier series. Eddy-currents are evaluated with an auxiliary winding, defined as a surface current density in the conducting region. The proposed method is based on well-established Maxwell-Fourier method. This permits other analysis, such as slotting effect through subdomain technique. The assumptions considered for the developed semi-analytical solution in two-dimensional problem are presented in depth and confronted with finite-element method results, confirming validity of proposed methodology.

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Section: Problem Description and Evaluated Prototypementioning

confidence: 99%

Improved Semi-Analytical Magnetic Field Solution for High-Speed Permanent-Magnet Machines With Permeable Retaining Sleeve Including Diffusion Effect

Mendonça¹,

Maia²,

Filho³

2020

PIER B

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“…The use of toothless rotor and stator iron cores simplifies the cryostat design with the advantage of reducing the iron loss, the generator mass, and the torque ripple. For direct-drive wind generators, the cogging torque and torque ripple should be less than 1% and 5% of the rated torque, respectively as recommended in [10].…”

Section: Electromagnetic Designmentioning

confidence: 99%

Design of a 20-MW Fully Superconducting Wind Turbine Generator to Minimize the Levelized Cost of Energy

Hoang

Quéval

Berriaud

et al. 2018

IEEE Trans. Appl. Supercond.

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“…The surface mount magnet configuration is the most common for permanent magnet motors, with a magnet located on the outer surface of the rotor core. However, this design is vulnerable to high centrifugal force, which might lead to catastrophic failure [7]- [9]. An interior magnet rotor is a feasible alternative that should be researched further to resolve this [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Analysis of interior rotor for high-speed brushless DC motor using finite element method

Abdullah,

Karim,

Othman

et al. 2023

IJPEDS

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<span lang="EN-US">The permanent magnet of brushless DC (BLDC) motor is ideally suited for high-speed application due to its superior performance and efficient as compared to other types of electrical motors. However, to operate in high-speed operation, the rotors that hold the magnet must be able to withstand high centrifugal force. Due to that, the main objective of this project is to design and develop the suitable rotor for high-speed BLDC motor through the finite element method (FEM) Ansys Maxwell modeling software. In addition, this project is also carried out to determine the ability of the modeled software to reach the high-speed performances in terms of cogging torque and induce voltage. In this project, the selected BLDC motor was fabricated and measured experimentally. The result showed that the designed rotor can achieve speed of almost 14,500 rpm.</span>

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Cogging Torque and Torque Ripple in a Direct-Drive Interior Permanent Magnet Generator

Cited by 6 publications

References 28 publications

Improved Semi-Analytical Magnetic Field Solution for High-Speed Permanent-Magnet Machines With Permeable Retaining Sleeve Including Diffusion Effect

Improved Semi-Analytical Magnetic Field Solution for High-Speed Permanent-Magnet Machines With Permeable Retaining Sleeve Including Diffusion Effect

Design of a 20-MW Fully Superconducting Wind Turbine Generator to Minimize the Levelized Cost of Energy

Analysis of interior rotor for high-speed brushless DC motor using finite element method

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