Abstract:

Abstract：Using Ansoft maxwell simulation analysis and experimental, research the overload protection problem for magnetic coupling applied to coal, and plotted the mechanical characteristics curve through experimental data。The conclusion can be gained from mechanical characteristic curve: when the output value of torque reaches the maximum torque of magnetic coupling, the output torque and speed dropped with the slip increases, motor input power was less than the power when the motor torque was at the maximum, this explained that the magnetic coupling has the function for overload protection.

Key words: Key words：magnetic coupling, overload protection, finite element analysis, mechanical characteristics curve