Taking into account the end effect, a three-dimensional calculation model of the magnetic coupling was established on the basis of the traditional two-dimensional magnetic field solution analysis, and the ANSYS software was used to simulate and analyze the three-dimensional model. The total magnetic induction intensity distribution and the magnetic field intensity distribution at the air gap were obtained. Etc., and KTR analyzed the end effect of the three-dimensional simulation of the magnetic coupling.

　　The comparison shows that due to the end effect of the three-dimensional model, the calculated value of the magnetic torque of the high-temperature and high-pressure KTR magnetic coupling is reduced by 21.92% compared with the two-dimensional model.The percentage of magnetic torque loss calculated by the traditional empirical formula is 14.52%, which is 7.4% less than the calculated loss of the three-dimensional simulation, indicating that the traditional empirical formula does not take into account the loss caused by the magnetic leakage at the end, and the designed magnetic coupling may be The transmitted torque cannot be achieved due to the end effect.

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