Induction Heating of Aluminum Billets Subjected to a Strong Rotating Magnetic Field Produced by Superconducting Windings

Lubin, Thierry; Netter, Denis; Lévêque, Jean; Rezzoug, A.

doi:10.1109/tmag.2009.2014461

Cited by 26 publications

(26 citation statements)

References 12 publications

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“…Output thermal power is always lower than input thermal power given that a small amount of heat is still exchanged between the converter and its surroundings even if the prototype and the pipes are wrapped with an insulation layer during the experiment. Energy conversion efficiency η is the ratio of P out to P in , and is calculated using Equation (19): Figure 21 shows the measured curves of flow flux, temperature, torque, rotation speed, and thermal power when the temperature of water in the inlet is 10˝C. Flow flux is 0.157 m 3 /h (0.8 m/s) and rotation speed is 1500 rpm.…”

Section: Experimental Systemmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of a Novel Mechanical to Thermal Energy Converter Based on the Inverse Problem of Electric Machines

et al. 2016

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A novel converter that can directly transform electrical, wind, hydraulic and other types of mechanical energy into thermal energy is presented in this study. First, the thermal energy of the converter is classified and then calculated by a finite element method. The eddy current distribution in the stator of the converter is also discussed. Second, the temperature field of the converter is calculated using a boundary element method. Subsequently, a thermal power-temperature coupled calculation method is presented to calculate the actual thermal power and temperature of the converter. The characteristic curves of the actual thermal power and the increase in water flow temperature are then presented based on the calculation results. Lastly, an experimental system is built, the thermal power and temperature of the converter are measured and the experimental results and the analytical calculations are compared.

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Section: Experimental Systemmentioning

confidence: 99%

“…This technique essentially uses an equivalent rotating magnetic field to generate eddy current. Lubin [19] applied a two-phase superconductive winding with two operating modes. The first mode is the same as the technique presented in [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Novel Mechanical to Thermal Energy Converter Based on the Inverse Problem of Electric Machines

et al. 2016

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“…Computation of eddy currents and power density. The induced current density in the complex domain is (Lubin et al, 2009):…”

Section: In Region 2 (Air Gap) Equation (25) In the Complex Domain Bementioning

confidence: 99%

A new high efficiency technology for the induction heating of non magnetic billets

Dughiero

Forzan

Lupi

et al. 2011

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -Low electrical resistivity metal billets can be heated by the currents induced by the rotation of the billet itself inside a transverse DC magnetic field produced by a superconductive coil. The main drawback of this approach is related to cost of installation that requires an adequate refrigerating system. The purpose of this paper is to propose a more convenient solution, which allows the same high efficiency to be achieved at lower cost. In this solution, the billet is kept still and a series of permanent magnets, positioned in the inner part of a ferromagnetic frame, is rotated. Design/methodology/approach -Some results of the new induction system are shown. These results are obtained applying for the electromagnetic solution both an FE commercial code and an analytical method. The analytical code is developed because several parameters of the system need to be optimized. Findings -The performance of the solution presented is comparable with those of the system with superconductive coils. The results of the two methods applied are in good agreement; thus the analytical code is validated. Originality/value -A new solution for the induction heating of aluminum billets is presented. The analytical code developed requires a very short computational time, also because it gives directly the steady-state condition of the system and, for this reason, it can be conveniently applied to an automatic design process.

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“…Firstly, the conducting object is exposed to a variable magnetic induction produced by AC winding, generally called conventional induction heaters. The drawback of this technique is its poor efficiency which is about 50 % [2], [3]. Thus, only half of the total input ac power is transformed into useful heat in the workpiece, the remaining 50% is lost in the ac copper winding.…”

Section: Introductionmentioning

confidence: 99%

A New Topology for Induction Heating System With PM Excitation: Electromagnetic Model and Experimental Validations

et al. 2015

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This paper presents a new structure of an induction heater for aluminium parallelepiped workpiece. The studied device uses a magnetic field created by a permanent magnets (PM) inductor (Halbach inductor) in which the conducting workpiece is subjected to a linear oscillatory motion with alternating velocity. An analytical electromagnetic model is developed to find the induced heating power in the workpiece. To consider the transverse edge effect, an analytical corrected model is also presented. The most important results obtained by these models are verified experimentally on a prototype. Index Terms-, analytical model, oscillatory linear motion, permanent magnet, transverse edge effect. 0018-9464 (c)

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Induction Heating of Aluminum Billets Subjected to a Strong Rotating Magnetic Field Produced by Superconducting Windings

Cited by 26 publications

References 12 publications

Investigation of a Novel Mechanical to Thermal Energy Converter Based on the Inverse Problem of Electric Machines

Investigation of a Novel Mechanical to Thermal Energy Converter Based on the Inverse Problem of Electric Machines

A new high efficiency technology for the induction heating of non magnetic billets

A New Topology for Induction Heating System With PM Excitation: Electromagnetic Model and Experimental Validations

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