The magnetic force ripples in a permanent magnet tubular linear motor (PMTLM) have been considered in the paper. A field modeling has been carried out for the linear motors with different phase numbers. The presented calculations have been carried out using the finite element method including real characteristics of the magnetic materials. The motor construction differs from the others by magnetic separation of the stator winding segments. Because of the modular design, it is simple for manufacturing. Moreover, the actuators with different phase numbers can be made using the standard components. The obtained results yields, that increasing phase number cause a lower force ripples, which is very favorable to precision machines e.g. CNC. Because the power electronic components get cheaper, the cost problem is not decisive. In the most applications, where the high precision is demand, the multiphase linear motors can be used.
W pracy zbadano wpływ szerokości i wysokości przekroju cewek stojana na siłę zaczepową i znamionową silnika liniowego tubowego z magnesami trwałymi. Badany silnik jest prototypową konstrukcją, w której uzwojenie stojana podzielono na 5 cewek tworzących fazy. Wraz ze zmianą wymiarów cewek zmianie ulegały także wymiary segmentów stojana. W obliczeniach wariantowych zachowano stałą gęstość prądu wzbudzenia w cewkach stojana.
EN
Effect of a width and height of a stator winding on the cogging and magnetic forces was studied for a permanent-magnet tubular linear motor. The investigated motor is a prototype solution in which the stator winding is divided into five phase coils. The coil size was subject of changing with appropriate changing of stator segments. A value of the current density in the stator coils was kept constant for numerous variants of the design calculations.
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