Multi-objective optimisation of a magnetic gear for powertrain applications

Cirimele, Vincenzo; Dimauro, Luca; Repetto, Maurizio; Bonisoli, Elvio

doi:10.3233/jae-191103

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…A multi-objective optimization approach was proposed to maximize the transmitted torque per unit mass of the magnetic gears while minimizing the moment of inertia of the moving parts. Self-performance optimization is a deterministic optimization algorithm combined with a weighted-sum approach of objectives, and the results were discussed and compared with those of commercial applications [15]. Mattia Filippini et al proposed a magnetic gear (MG) that achieves the same functions as a differential while having unique advantages such as reduced maintenance and high efficiency, and they verified it through experiments and simulations [16].…”

Section: Introductionmentioning

confidence: 99%

A Study on Power Transmission Control for Applying MR Fluid Multi-Plate Clutch to Automobile Power Distribution Device

Park,

Jeon,

Kim

2024

Applied Sciences

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The aim of this study is to design and manufacture a multi-plate clutch system that uses magnetorheological (MR) fluid control to allow for a variable power transmission ratio in power distribution systems. MR fluid is a smart material that enables presenting a solution to the shocks and power loss that occur due to mechanical problems in power distribution systems. As such, the longitudinal and lateral dynamic properties of 4WD (four-wheel drive) vehicles were examined and analyzed to develop an algorithm to control the front/rear power distribution according to the road surface state and driving conditions. To verify the algorithm, the CarSim vehicle dynamics simulation program was adopted to perform experiments to understand the vehicle’s dynamic performance improvements and turning stability via a HILS (Hardware in the Loop) system. In this study, an MR fluid, multi-plate clutch was used that combines a dry clutch and a wet clutch using the characteristics of the MR fluid. Such a clutch was designed to enable continuous and smooth torque transmission by utilizing the strengths of each of the dry and wet clutches. The CarSim vehicle dynamics program was used to conduct the experiments, which were conducted by linking to the manufactured MR fluid clutch experimental device. The experiments investigated the dynamic performance based on the power distribution ratio by performing longitudinal flat, inclined driving and lateral DLC (double lane change) driving. In summary, this study found that it is possible to perform power transmission by applying a current to an MR fluid and forming a magnetic field to change the flow properties of the fluid to control the torque transmission ratio that occurs in an MR fluid clutch.

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Section: Introductionmentioning

confidence: 99%

A Study on Power Transmission Control for Applying MR Fluid Multi-Plate Clutch to Automobile Power Distribution Device

Park,

Jeon,

Kim

2024

Applied Sciences

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“…Hybrid electric vehicles represent the best tradeoff between traditional fuel vehicles and pure electric vehicles (EVs), thus becoming the perfect transitional stage. The fuel efficiency of HEV has traditionally improved through new developments in aerodynamics, engine technology, light-weight materials, and innovative concepts for powertrain component design [2,6]. HEV uses two power sources: an internal combustion engine and an electric battery; thus, the fuel economy varies substantially depending on the power source used to meet the vehicle request.…”

Section: Introductionmentioning

confidence: 99%

Energy Management Strategy for Hybrid Multimode Powertrains: Influence of Inertial Properties and Road Inclination

et al. 2021

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Multimode hybrid powertrains have captured the attention of automotive OEMs for their flexible nature and ability to provide better and optimized efficiency levels. However, the presence of multiple actuators, with different efficiency and dynamic characteristics, increases the problem complexity for minimizing the overall power losses in each powertrain operating condition. The paper aims at providing a methodology to select the powertrain mode and set the reference torques and angular speeds for each actuator, based on the power-weighted efficiency concept. The power-weighted efficiency is formulated to normalize the efficiency contribution from each power source and to include the inertial properties of the powertrain components as well as the vehicle motion resistance forces. The approach, valid for a wide category of multimode powertrain architectures, is then applied to the specific case of a two-mode hybrid system where the engagement of one of the two clutches enables an Input Split or Compound Split operative mode. The simulation results obtained with the procedure prove to be promising in avoiding excessive accelerations, drift of powertrain components, and in managing the power flow for uphill and downhill vehicle conditions.

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“…The ferromagnetic steel segments modulate the magnetic field in order to allow the electromechanical interaction between the different rotors giving rise to the torque transmission. The principles of operation of the magnetic gears are better detailed in [4][5][6]. Thanks to the absence of contacts between the rotors, magnetic gears overcome several limitation presented by the classical mechanical gears such as mechanical friction and consequent wear, necessity of lubrication and maintenance, while they offer additional remarkable benefits: For instance, the inherent overload protection and self re-engaging when the overload torque is removed [7].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Loss Analysis in Coaxial Magnetic Gears

et al. 2019

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This paper proposes a procedure for computing magnetic losses in coaxial magnetic gears. These magnetic structures are made of permanent magnets and ferromagnetic poles in relative motion transferring torque between two shafts in a contactless way. The loss computation in magnetic materials is crucial to define the system performance. The flux distribution inside the iron parts is computed by means of the finite element method and a model of iron losses taking into account the rotational nature of the flux loci is applied. The procedure highlights where the major loss sources are present and gives the opportunity to evaluate some corrective measures to reduce their effects. Particular attention is devoted to the 2D modeling in presence of permanent magnets segmentation.

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Multi-objective optimisation of a magnetic gear for powertrain applications

Cited by 10 publications

References 6 publications

A Study on Power Transmission Control for Applying MR Fluid Multi-Plate Clutch to Automobile Power Distribution Device

A Study on Power Transmission Control for Applying MR Fluid Multi-Plate Clutch to Automobile Power Distribution Device

Energy Management Strategy for Hybrid Multimode Powertrains: Influence of Inertial Properties and Road Inclination

Magnetic Loss Analysis in Coaxial Magnetic Gears

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