When the coal mining scraper conveyor is stopped for various reasons during operation, it is in a heavy-load start-up state when it is restarted, which is different from the initial start-up. In order to be able to enter the running state, each part of the equipment must meet the corresponding requirements.
The first is the requirement for the frequency converter of the coal mining scraper conveyor to ensure that it can start the heavy load of the conveyor belt material of the coal mining scraper conveyor; the second is the requirement for the motor. The torque output by the motor not only needs to overcome the static friction between the roller and the roller shaft The resistance torque caused must also overcome the resistance torque caused by the downward pull of the material on the conveyor.
It is concluded that the frequency converter of the coal mining scraper conveyor must have the function of low speed and large starting torque. And this large low-speed starting torque needs to be maintained for a certain period of time, mainly considering the low speed at the time of starting, and the elasticity of the belt and other factors.
