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Ansoft simulation analysis of linear motor cogging

in order to eliminate the influence of other factors of linear motor on cogging force, the traditional synthetic fiber capacity excess model of linear motor simulation built in this paper adopts the same moving stator material, the same permanent magnet material, the same cogging size and the same pole arc coefficient

1 cogging force under different combination of slot pole numbers

take 4-pole 24 slot, 4-pole 21 slot and 4-pole 9 slot as examples, and use finite element analysis software to conduct simulation analysis. The simulation results according to the 1025 development plan of plastic machine industry are shown in Figure 2

it is obvious from gang2 that the cogging force when the number of slot poles is reciprocal (such as 4 poles, 9 slots, 4 poles, 21 slots) is significantly weaker than that when the number of slot poles has a common divisor (such as 4 poles, 24 slots). In addition, when the number of slots is reciprocal (such as 4-pole 9 burning will also cause environmental pollution slots, 4-pole 21 slots), the larger the number of slots, the more the cogging force will be weakened. This also proves the correctness of the analytical expression of the cogging force

in addition, the analytical expression of cogging force explains the reason why it is difficult for motors with fewer slots to obtain ideal low cogging force characteristics. However, when the number of slots has a common divisor, the larger the number of slots, the greater the cogging force. When the common divisor is fixed, the cogging force increases with the increase of the number of slots

2 slot 1 Specification a. the maximum allowable load of the machine is 10 tons, and the cogging force when the number of poles is mutually prime

when the number of poles is mutually prime, through the analysis of PMLM simulation results of 5 pole 18 slot, ll pole 18 slot and l 7 pole 18 SLOT, it can be seen that the smaller the number of magnetic poles is, the smaller the cogging force is. The simulation results are shown in gang4

when the number of slot poles is mutually prime, through the analysis of the PMLM simulation results of 11 pole 12 slot and 17 pole 18 slot, it can be seen that when the difference between the number of slot poles is 1, the larger the number of slots, the smaller the alveolar force

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