Abstract
According to the principle of magnetic needle driven, through analysis and experimental research on early discovery theory of induction magnetic field distribution, magnetic density is directly related to the size of the driving coil profile and magnetic size with coil profile changes. According to the properties of magnetic drive principle and magnetic source, the intrinsic link between the certification of electromagnetic coil and permanent magnet needle contour change force theoretically, provide reliable theoretical basis for magnetic source driver for driving magnetic needle mechanism. By establishing the theoretical model of magnetic force and combining Monte Carlo method, genetic algorithm is used to optimize the shape of driving coil, and the feasibility of the optimized structure is verified by Maxwell simulation. The results show that a smooth F-z curve can be constructed by changing the contour shape of the driving coil, and the optimized driving structure is obtained, which provides a theoretical basis for the verification of the later experimental system.
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