Long-stroke magnetic levitation planar motor low-harmonic permanent magnet array and modeling method

The invention discloses a low-harmonic permanent magnet array of a long-stroke magnetic levitation planar motor and a modeling method, and belongs to the field of permanent magnet arrays and electromagnetic modeling, and the permanent magnet array is a p-row q-column array formed by alternately and periodically arranging first permanent magnet units and second permanent magnet units; the first permanent magnet unit comprises vertical magnetized permanent magnets arranged according to a Halbach arrangement mode and horizontal magnetized permanent magnets distributed on the upper portion, the lower portion, the left portion and the right portion of the vertical magnetized permanent magnets. The vertical magnetized permanent magnet is a polygonal prism with 4 alpha edges, which is formed by chamfering four right-angle parts of a square cylinder; the horizontally magnetized permanent magnet is a rectangular cylinder or a polygonal prism with 4 alpha edges, and the polygonal prism is formed by chamfering four righ