화학공학소재연구정보센터
IEEE Transactions on Energy Conversion, Vol.21, No.2, 305-313, 2006
A field reconstruction method for optimal excitation of permanent magnet synchronous machines
Vibration caused by torque ripple and radial force harmonies is a concern in many applications of permanent magnet synchronous machines (PMSMs). Alternative methods of machine design and/or stator excitation to minimize torque ripple have received considerable attention in recent years. Comparatively, methods to minimize radial force harmonics have received less attention. In this paper, a field reconstruction (FR) method is derived that provides a designer with the capability to rapidly determine the radial and tangential components of force under arbitrary stator excitation. Using the field reconstruction method, stator current waveforms that minimize the ripple of both torque and radial force are derived subject to the constraint of maintaining a satisfactory level of torque density.