Abstract
Liner synchronous motor (LSM) is perspective motor for milling machines and other manufacturing equipment such as 3D printers, laser cutting and engraving machines, etc. Some different construction of LSM can be found. The LSM with permanent magnets is modeled in this paper. Comsol Multiphysics is used for finite element model of LSM. Motor stator is built using rear earth magnets N52, an anchor consists of 6 teeth with 3-phase winding. Large cogging force is the problem of LSM, so there is task to reduce this force. This task can be solved by motor geometry optimization. Geometric parameter of motor is represented by variables. It allowed using optimization methods for best geometry search. FEM model with two different mesh sizes is analysed in this paper. Each mesh allows find solution but calculation time and tolerance are different. During experiments, optimal size of tooth for maximal driving force is found. Cogging force is also reduced.
Highlights
In modern engineering, it is necessary to intensify the production processes of various parts
The creation of high-speed milling machines requires the creation of high-speed drives with high dynamic performance
The main advantage of drives based on the linear electric motors (LM) base compared to drives based on conventional motors is the absence of a mechanism that converts the rotation of the motor shaft to linear movement of the working element
Summary
It is necessary to intensify the production processes of various parts. Drives based on synchronous and asynchronous motors with mechanical transmission “spindle screw” cannot provide high speeds and accelerations of movement of the machine tool. To avoid this problem a drive can be built using linear electric motors (LM). Simplified models do not allow taking into account additional forces affecting the dynamics of LD. These forces include the so-called cogging force. LM in order to take into account the influence of all geometric and electrical parameters of the engine on its dynamic characteristics
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