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Permanent magnetic synchronous motor (PMSM) is often the most important element in precision machine tools as the direct dive motor and also a frequent source of vibration and acoustic noise. So this type of PMSM needs smooth rotation with low cogging torque in order to precise localization. This paper presents a general proposal to optimize the performance of an asymmetric PMSM using finite element...
The detent force due to the interaction between the permanent magnets (PMs) and the teeth produces vibrations and noise. Especially, it deteriorates the low speed performances obviously and reduces the positioning precision. Based on the Fourier analysis of the detent force curve as a function of the motor position and initial phase angle of the harmonics of each pole, the detent force can be reduced...
Discontinuous primary permanent magnet linear synchronous motor (DPPMLSM) has many merits in long-stroke transportation, including vertical, horizontal, and slanted model system, however, detent force of DPMLSM is particularly troublesome requiring positioning accuracy specially at low speed region as well as of position control and is different from short primary type and short secondary type PMLSM...
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