<i>Superconducting Magnet Systems</i>

Brechna, H.; Laverick, C.

doi:10.1063/1.3069061

Cited by 75 publications

(14 citation statements)

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“…Self-field loss: the change of transporting current leads to the change of self-field which causes movement of flux and generates energy loss. The unit volume self-field loss is [5] …”

Section: Ac Loss Power Of Magnetmentioning

confidence: 99%

Loading experiment and thermal analysis for conduction cooled magnet of SMES system

Wang

Xie

et al. 2009

Front. Electr. Electron. Eng. China

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China's first 35 kJ high temperature superconducting magnetic energy storage (SMES) system with an experiment equipment was depicted. The dynamic heat analysis of the magnet of the SMES was conducted through the current load test on the directly cooled conduction magnet. The research results were as follows: when the converter charges and discharges the magnet for energy storage, the hysteresis loss is the main part of power loss, and contributes significantly to temperature rise; reducing the current frequency at the side of direct current is conducive to restraining temperature rise. The optimizing factors of the cool-guide structure were analyzed based on the heat stability theory, and it was found that the heat transfer of its key part (at the top of the magnet) must be strengthened to reduce the axial temperature difference of the magnet.

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“…Self-field loss: the change of transporting current leads to the change of self-field which causes movement of flux and generates energy loss. The unit volume self-field loss is [5] …”

Section: Ac Loss Power Of Magnetmentioning

confidence: 99%

Loading experiment and thermal analysis for conduction cooled magnet of SMES system

Wang

Xie

et al. 2009

Front. Electr. Electron. Eng. China

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“…The surface current density relaxes into a (volume) current density J c to go into the critical state. Let us now trace back the surface current density from a volume current density J´x ¼ y ¼ µ. Ifî ĵ andk denote unit vectors along the co-ordinate axes then the field B J generated by J is given by [20] …”

Section: Volume Current Density Viewed As a Succession Of Current Shellsmentioning

confidence: 99%

Magnetization curves for general cylindrical samples in a transverse field

Bhagwat

Karmakar

2001

Pramana - J Phys

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Using the recent results for the surface current density on cylindrical surfaces of arbitrary cross-section producing uniform interior magnetic field we propose a method for obtaining solutions of Bean's critical state model for general cylindrical samples. The method uses the technique of conformal mapping to express the sample surface and the flux-fronts in terms of a set of coefficients that depend on a parameter. The flux-fronts are to be determined by solving a system of nonlinear ordinary differential equations for the coefficients. Retaining only a certain finite number of leading coefficients we get an approximate solution. The procedure is illustrated by considering two cylindrical samples -one with an elliptical cross-section and the other with a non-elliptical cross-section. The virgin curve and small and large magnetization hysteresis loops for the two samples are obtained.

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“…The sample, in response, will carry a (volume) current density Â´Ü ¼ Ý ¼ µ parallel to the axis of the cylinder. If , and denote unit vectors along the co-ordinate axes then the field Â generated by J is given by [10] …”

Section: Analytical Formulationmentioning

confidence: 99%

“…Virgin magnetization (magnetic moment/unit volume) of a zero field cooled sample can be obtained from the relation Ñ Ú 1 ¾ µ Ö ¼ ¢ Â µ Ü ¼ Ý ¼ (10) where is the cross-sectional area of the sample and Ö ¼ Ü ¼ · Ý ¼ · Þ ¼ . Changing the variables of integration to´ ¼ ¼ µ and noting that the current density is along we get …”

Section: The Solutionmentioning

confidence: 99%

Magnetization curves for non-elliptic cylindrical samples in a transverse field

Karmakar

Bhagwat

2001

Pramana - J Phys

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Using recent results for the surface current density on cylindrical surfaces of arbitrary cross-section producing uniform interior magnetic field and an assumed set of flux-fronts, solutions of Bean's critical state model for cylindrical samples with non-elliptic cross-section are presented. Magnetization hysteresis loops for two cross-sections with different aspect ratios are obtained. A comparison with some exact results shows the limitations of this approach.

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Superconducting Magnet Systems

Cited by 75 publications

References 0 publications

Loading experiment and thermal analysis for conduction cooled magnet of SMES system

Loading experiment and thermal analysis for conduction cooled magnet of SMES system

Magnetization curves for general cylindrical samples in a transverse field

Magnetization curves for non-elliptic cylindrical samples in a transverse field

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