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Let the small series have been concerned about the thing happened, the motor coil is very easy to damage. What is the reason? It is understood after such: iron removal is the main production equipment for raw coal workshop, except the iron of the original structure is the two block, a head with three motors for blowing cooling. In an underground mine, this structure is no problem, but in Zhungeer Coal Preparation Plant, due to the coal yield, low moisture in coal, coal dust, but the space is closed, the heat is not good, resulting in motor coil easily damaged. The requirements of the motor coil on the environment is more and more strict, can not say it hypocritical, after all in that environment, coil's ability to adapt is limited.