Design and control of a superconducting permanent magnet synchronous motor

Abstract

This paper gives a detailed description of the design of a superconducting permanent magnet synchronous motor. The parameters of the motor have been identified, and the torque equation has been stated. A direct torque control algorithm is introduced and applied to a traditional permanent magnet synchronous motor and the superconducting permanent magnet synchronous motor described in this paper. The motor performance shows that the direct torque control algorithm provides excellent control to the superconducting motor, and guarantees that the magnitude of the operational armature currents is smaller than the value of the critical current of the superconducting tape used for stator winding.

Design Methodology of HTS Bulk Machine for Direct-Driven Wind Generation

“…Pulsed magnetization method [10] and flux pump method [11] can be utilized to magnetize superconducting bulks. Some in-situ HTS bulk machine have seen studied and realized using pulse method and flux pump method respectively [7], [8], [12].…”

“…The Tokyo University of Marine Science and Technology designed and built an axial type bulk motor [8], [14]. By using the armature winding to magnetize the Gd-Ba-Cu-O bulk, they achieved 1 T trapped field on the bulk surface under 77 K. Our lab also successfully demonstrated an air-cored HTS bulk motor using YBCO bulk arrays [7]. However, there is little study regarding the theoretical analysis of the HTS bulk machine.…”

HTS Motor Performance Evaluation by Different Pulsed Field Magnetization Strategies

“…Some of these technologies have been demonstrated in the past by different groups either by using Gd-based superconducting bulks on the designing of an axial-gap type synchronous propulsion motor [2], or by using 2G-HTS wires for the prototyping of synchronous induction motors [3]. Likewise, at the Department of Engineering of the University of Cambridge, U.K., the concept of a fully HTS motor has been studied since 2005 [4], where multiple stator and rotor designs have been explored [5][6][7][8][9][10]. In the original design [4], the field and armature windings of the EPEC HTS motor were intended to be made of 2G-HTS wires, but this idea was rapidly abandoned due to the high cost of the machine and the lack of knowledge on the performance of stacks of superconducting wires subjected to crossed and rotating magnetic fields, the latter an issue recently covered by some of the authors of this paper [11].…”

“…In the original design [4], the field and armature windings of the EPEC HTS motor were intended to be made of 2G-HTS wires, but this idea was rapidly abandoned due to the high cost of the machine and the lack of knowledge on the performance of stacks of superconducting wires subjected to crossed and rotating magnetic fields, the latter an issue recently covered by some of the authors of this paper [11]. Thus, the four-pole motor design had to be reconsidered in 2007 [5], leading to the prototyping of the first fully HTS superconducting motor at EPEC, with the rotor being composed by an array of seventy-five YBCO superconducting bulks [12] attached to the surface of a cylindrical shaft [6], and the stator is made of an array of six 2G-HTS racetrack coils [7]. However, the control and operation of this motor in synchronous regime demonstrated to be too challenging at this stage, and it was not up to 2013 when an adequate control system was embedded [8].…”

Identification and Control of PMSM Using Adaptive BP-PID Neural Network

“…It has been applied to social activities popularly [1]. Hence the d,q model of the PMSM can be derived from the well-known model of the synchronous machine [2].Though PMSM have been widely used as precision control motors.…”