Gearing ratios of a magnetic gear for marine applications

Frank, Nicolas; Toliyat, H.A.

doi:10.1109/ests.2009.4906554

Cited by 39 publications

(23 citation statements)

References 6 publications

(11 reference statements)

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“…The use of a CMG instead of a mechanical drive system would significantly mitigate, or in some cases eliminate, the drawbacks noted above. Many researchers have studied the improvement of the transmitted torque of CMG with relatively high gear ratio [7][8][9][10]. However, the characteristics and performances of CMG with a low gear ratio of 1 to 2 have not been reported yet in detail.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Coaxial Magnetic Gear with Low Gear Ratios for Application in Counter Rotating Systems

Shin¹,

Chang²

2015

Journal of Magnetics

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This paper describes the electromagnetic and mechanical characteristics of coaxial magnetic gear (CMG) with a low gear ratio. The analysis models are restricted to a CMG with a gear ratio of less than 2. The electromagnetic characteristics including transmitted torque and iron losses are presented according to the variation of the gear ratio. The pole pairs of high speed rotor are chosen as 6, 8 and 10 by considering the torque capability. As the gear ratio approaches 1, both iron losses on the ferromagnetic materials and eddy current losses on the rotor permanent magnets are increased. The radial and tangential forces on the modulating pieces are calculated using the Maxwell stress tensor. When the maximum force is exerted on the modulating pieces, the mechanical characteristics including stress and deformation are derived by structural analysis. In CMG models with a low gear ratio, the maximum radial force acting on modulating pieces is larger than that in CMG models with a high gear ratio, and the normal stress and normal deformation are increased in a CMG with a low gear ratio. Therefore, modulating pieces should be designed to withstand larger radial forces in CMG with a low gear ratio compared to CMG with a high gear ratio.

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Section: Introductionmentioning

confidence: 99%

Analysis of Coaxial Magnetic Gear with Low Gear Ratios for Application in Counter Rotating Systems

Shin¹,

Chang²

2015

Journal of Magnetics

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“…Although the nonlinear characteristic of the ferromagnetic materials has not been taken into account, the calculation results were acceptable compared with that obtained by using finite element method (FEM). CMGs also exhibit their potential in several industrial applications, such as wind power generation [9,10], electric vehicles [11] and ship propulsion [12].…”

Section: Introductionmentioning

confidence: 99%

Optimum Design for Improving Modulating-Effect of Coaxial Magnetic Gear Using Response Surface Methodology and Genetic Algorithm

Jian

Xu²,

Song³

et al. 2011

PIER

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Abstract-Coaxial magnetic gear (CMG) is a non-contact device for torque transmission and speed variation which exhibits promising potential in several industrial applications, such as electric vehicles, wind power generation and vessel propulsion. CMG works lying on the modulating-effect aroused by the ferromagnetic segments. This paper investigates the optimum design for improving the modulating-effect. Firstly, the operating principle and the modulating-effect is analyzed by using 1-D field model, which demonstrates that the modulatingeffect is essential for the torque transmission capacity of CMGs, and the shape of the ferromagnetic segments have impact on the modulatingeffect. Secondly, the fitted model of the relationship between the maximum pull-out torque and the shape factors including radial height, outer-edge width-angle and inner-edge width-angle is built up by using surface response methodology. Moreover, FEM is engaged to evaluate its accuracy. Thirdly, the optimum shape of the ferromagnetic segment is obtained by using genetical algorithm.

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“…The fieldmodulated magnetic gear (FMMG) has a coaxial topology, which significantly improves the permanent magnet (PM) utilization rate and can generate much higher torque and torque density than traditional magnetic gears that use a parallel shaft topology [2]. Therefore, FMMGs are widely used in the vehicle, wind, marine, and aerospace fields [3][4][5]. Various high-performance FMMG-based systems have been proposed, such as axial-flux magnetic gears, linear magnetic gears, and intersecting axes magnetic gears [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Resonance Responses of Electromechanical Integrated Magnetic Gear System

Hao

Zhu

Pan

2018

Shock and Vibration

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Nonlinear differential equations for an electromechanical integrated magnetic gear (EIMG) system are developed by considering the nonlinearity in the magnetic force of the system components. Expressions for the main resonances and superharmonic resonances are obtained for output wave frequencies close to the natural frequency and half the natural frequency of the derived EIMG system. The response laws are discussed in detail. The magnetic coupling stiffness among the components is found to exhibit distinct nonlinearity, leading to strong main resonances and superharmonic resonances. Smaller values of the magnetic coupling stiffness and damping result in larger response amplitudes and transient responses that slowly decay to zero. When the main resonances and superharmonic resonances occur, the dominant frequency of the response is the natural frequency of the derived EIMG system, and the amplitudes of different components of the resonance display large differences.

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Gearing ratios of a magnetic gear for marine applications

Cited by 39 publications

References 6 publications

Analysis of Coaxial Magnetic Gear with Low Gear Ratios for Application in Counter Rotating Systems

Analysis of Coaxial Magnetic Gear with Low Gear Ratios for Application in Counter Rotating Systems

Optimum Design for Improving Modulating-Effect of Coaxial Magnetic Gear Using Response Surface Methodology and Genetic Algorithm

Nonlinear Resonance Responses of Electromechanical Integrated Magnetic Gear System

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