Abstract
Superconducting electrical devices have been developed in various fields especially in industrial energy over a decade. Superconducting motor is one of the electrical devices that attracted the attention of engineers and researchers from the universities and industries due to its distinctive energy efficiency. This paper describes the performance of superconducting electric motor and its performance was compared with conventional copper electric motor. Direct current (DC) synchronous single- phase series motor has been chosen as the base for development of both motors. Two prototypes of electric motor fabricated using conventional copper coil and superconducting coil were developed with similar motor type, design, dimension, and features. The superconducting motor coil was wound using Bi-2223 (DI-BSCCO) Type H wires developed by Sumitomo Electric Industries Limited, Japan. A finite element analysis was performed to get a clear view on flux plots of the magnetic induction. Features of the superconducting motor and the special coil frame designed to protect the superconducting wire was also presented in this paper. In addition, the torque performances for both types of motor were measured. The superconducting electric motor was found to consume lower power to produce the same output compared with the conventional copper-wound motor.
Highlights
Since the discovery of superconductivity in 1911 by Kamerlingh Onnes, the dream of creating highly efficient electric machine is getting closer to a reality
Superconductor required cooling process below the critical temperature, Tc which is called as transition temperature to become zero resistance
The fabricated coil was directly mounted to the two-leg of the stator and cooled by liquid nitrogen
Summary
Since the discovery of superconductivity in 1911 by Kamerlingh Onnes, the dream of creating highly efficient electric machine is getting closer to a reality. Superconducting materials are able to carry current with zero resistance and reduce power loss during the process of transmitting electricity [1]. This distinctive property of superconductor has seized the attention of many researches and a lot of studies have been carried out to produce superconducting wire with high stability. Long length superconducting wire has been successfully produced with a very reliable performance [2,3]. Superconducting devices such as magnetic resonance imaging (MRI) and superconducting quantum interference devices (SQUID) have been used in medicine and industry extensively.
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