Influence of Auxiliary Teeth on Performance of a Permanent Magnet Linear Motor

Linear permanent magnet motors (LPMMs) have been used in a wide range of applications from automation to transportation in recent years. Detent force component, which is added to total force directly, is an important issue in industrial applications where smooth position control is required. Auxiliary teeth design is critical to obtain smooth operation. In this paper, auxiliary-teeth design optimization is investigated to reduce the detent force by the end effect of the motor. The LPMM performance and effect of the auxiliary-teeth are analyzed by using finite element analysis (FEA) package. Also, the prototype linear motor with auxiliary-teeth has been manufactured in order to obtain linear motor performance. The experimental results are also compared with the FEA results.