Investigation of load effect on the magnetization performance of stator consequent pole memory machine

Abstract

In this paper, the load effect on the magnetization performance of a stator consequent pole memory machine (SCPMM) is revealed and investigated comprehensively. The topology of the SCPMM is described, and influences of the load effect on the magnetization state (MS) manipulation process are characterized by the magnetic field distributions excited by different types of currents. Subsequently, the demagnetization type induced by the load effect and the cross-coupling phenomenon is identified and analyzed by a virtual linear hysteresis model. The characteristic curves of the magnetizing and demagnetizing processes vs different q-axis armature currents are tested experimentally in a SCPMM prototype. In order to improve the MS manipulation accuracy, a compensation control strategy that takes the load effect into consideration is proposed. Finally, the effectiveness of the proposed compensation control strategy is verified by experiments.