Optimization of an HTS Induction/Synchronous Motor According to Changing of HTS Tapes Critical Current by Analytical Hierarchy Process

Kazemzadehi, F.; Heydariii, H.

doi:10.22060/eej.2010.99

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Optimization of an HTS Induction/Synchronous Motor According to Changing of HTS Tapes Critical Current by Analytical Hierarchy Process

Article 3, Volume 42, Issue 1, Spring and Summer 2010, Page 17-29 PDF (850 K)

Document Type: Research Paper

DOI: 10.22060/eej.2010.99

Authors

F. Kazemzadehi^* ¹; H. Heydariii²

¹Corresponding Author, F. Kazemzadeh is with the High Voltage and Magnetic Material Research Center, Electrical Engineering Department, Iran University of Science and Technology (IUST), Tehran 1684613114, Iran (e-mail: fkazemzadeh@elec.iust.ac.ir).

²H. Heydari is with the Center of Excellence for Power System Automation and Operation, Iran University of Science and Technology (IUST), Tehran 1684613114, Iran (e-mail: heydari@iust.ac.ir).

Abstract

This paper represents the performance of a squirrel-cage High Temperature Superconducting Induction/ Synchronous Motor (HTS-ISM) based on nonlinear electrical equivalent circuit. The structure of the HTS-ISM is the same as that of the squirrel-cage type induction machine, and the secondary windings are fabricated by the use of the HTS wires. It has already been shown that based on the experiments that even this simple replacement realizes the excellent improvement of the performances such as coexistence of slip and synchronous rotations, higher efficiency (due to the synchronous operation), and robustness against the overload. In this paper, the transient modeling of this motor is performed by Matlab Simulink. Also, it is shown by FEM that starting and synchronous torque is extremely dependent on input voltage and critical current of superconducting tapes of the rotor. So, the starting and synchronous torque of the HTS induction motor can be improved with adjustment of the input voltage and critical current of the rotor HTS tapes. Also, in order to optimize both the starting and synchronous torques simultaneously, the relationship between these torques and the critical current of the HTS tapes have been investigated. Finally, according to the variation of the critical current, we optimized the design of the motor by analytical hierarchy process with finding the appropriate critical current for HTS tapes of rotor. The equations obtained are nonlinear, and then the typical Newton–Raphson method is used for the calculation.

Keywords

HTS induction motor optimization; superconducting rotor; HTS-ISM; Analytical Hierarchy Process

References

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Farhad Kazemzadeh and Hossein Heydari “Selecting a best point of Critical Current for the HTS Tapes of an HTS Induction/Synchronous Motor by Analytical Hierarchy Process” 26th international power systam conference, PSC 20

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