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Title: Characteristics of temperature rise in variable inductor employing magnetorheological fluid driven by a high-frequency pulsed voltage source

A variable inductor with magnetorheological (MR) fluid has been successfully applied to power electronics applications; however, its thermal characteristics have not been investigated. To evaluate the performance of the variable inductor with respect to temperature, we measured the characteristics of temperature rise and developed a numerical analysis technique. The characteristics of temperature rise were determined experimentally and verified numerically by adopting a multiphysics analysis technique. In order to accurately estimate the temperature distribution in a variable inductor with an MR fluid-gap, the thermal solver should import the heat source from the electromagnetic solver to solve the eddy current problem. To improve accuracy, the B–H curves of the MR fluid under operating temperature were obtained using the magnetic property measurement system. In addition, the Steinmetz equation was applied to evaluate the core loss in a ferrite core. The predicted temperature rise for a variable inductor showed good agreement with the experimental data and the developed numerical technique can be employed to design a variable inductor with a high-frequency pulsed voltage source.
Authors:
;  [1] ;  [2] ;  [3]
  1. School of Electronics Engineering, Kyungpook National University, Daegu 702-701 (Korea, Republic of)
  2. Korea Electrotechnology Research Institute, Changwon 642-120 (Korea, Republic of)
  3. Department of Electrical Engineering, Kyungpook National University, Daegu 702-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22410083
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DIAGRAMS; EDDY CURRENTS; ELECTRIC POTENTIAL; FERRITES; FLUIDS; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETISM; NUMERICAL ANALYSIS; PERFORMANCE; RHEOLOGY; SOLENOIDS; TEMPERATURE DISTRIBUTION