Abstract
Linear motor offers several features in many applications that require linear motion. Nevertheless, the presence of cogging force can deteriorate the thrust of a permanent magnet linear motor. Using several methodologies, a design of synchronous single sided linear iron-core motor was proposed. According to exact formulas with surface-mounted magnets and concentrated winding specification, which are relying on geometrical parameters. Two-dimensional performance analysis of the designed model and its multi-objective optimization were accomplished as a method to reduce the motor cogging force using MAXWELL ANSYS. The optimum model design results showed that the maximum force ripple was approximatrly reduced by 81.24%compared to the original model with a smaller ripple coefficient of 0.22. Likewise, the model was redesigned taking into consideration two cases; laminated core and solid core. It was found that the error between the analytical and numerical results of the output force did not exceed 0.0967%.
Highlights
Permanent magnet linear motors (PMLMs) are used in wide industrial applications; for high positioning accuracy of concerned implementations
It's found that adding a Flux Gathering Ring (FGR) to the outer stator teeth of a linear tubular generator could be an effective method to reducing the end effect
Cao et al [10] investigated the effect of some leading design parameters on the force performance of a complementary and modular linear flux-switching permanent-magnet (LFSPM) motor
Summary
Permanent magnet linear motors (PMLMs) are used in wide industrial applications; for high positioning accuracy of concerned implementations. The detent (or cogging) force is generated by the attraction of the magnets to the LM's core. It's found that adding a Flux Gathering Ring (FGR) to the outer stator teeth of a linear tubular generator could be an effective method to reducing the end effect. Cao et al [10] investigated the effect of some leading design parameters (mover tooth width, the slot open width the width of the slot under PM, mover height and the motor stack length) on the force performance of a complementary and modular linear flux-switching permanent-magnet (LFSPM) motor. Jalal et al [11] presented the FEA optimization techniques followed by development of a Matlab/Simulink model to investigate the effects of electrical machine inductance and the combined electromagnetic loading of the machine on the resulting force and cogging force. The optimum dimensions required are the magnet length, magnet width, magnet height, air gap length, motor length at zdirection and the motor ends' width
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