Development of doubly salient permanent magnet linear synchronous motor for general-purpose automation applications

Teeth Arrangement and Pole–Slot Combination Design for PMLSM Detent Force Reduction

“…Table 1 lists some of the feasible pole-slot combinations that realize high LCM values and winding factors. Among these combinations, the 8-pole, 6-slot-based PMLSM combined with skewing design has been previously investigated [1,13,14]. This paper investigates a 10-pole, 12-slot-based PMLSM because it is a good candidate to show the effectiveness of the proposed design strategy for two reasons.…”

“…The key idea of the teeth arrangement design suggested earlier is using supplementary angle relationships among the existing phases when spacing the sections apart [1,[13][14][15]. For three-phase PMLSMs, the minimum span is preferably 60 (=1/3π) electrical degrees, which equals 1/3τ p , as schematically shown in Figure 1b.…”

“…Figure 12 shows the test setup for thrust measurement, and Figure 13 shows the test setup for evaluation of the servo performance. This evaluation includes motion resolution, repeatability, and speed ripples [1,14,15].…”

“…Recently, the authors of [1,[12][13][14][15][16] have successfully proposed a new design technique that sectionalizes the mover into at least two sections and rearranges phase distribution in each section to ensure the maximum winding factor under any given pole-slot combination. This technique is simple and unusually effective for reducing the end effect.…”

“…This technique is simple and unusually effective for reducing the end effect. This methodology can be applied in a single-stator structure [12][13][14][15][16] and in a double-stator structure [1,17,18]. However, it still requires a skewing design or other design technique to reduce the cogging force component.…”