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     Mine hoist is a coal mine, non-ferrous metal ore production process in the important equipment. Hoist safety, solid operation, is directly related to the company's production situation and economic benefits. In order to overcome the shortcomings of the conventional series winding resistance series speed regulating system, the frequency conversion speed control technology is adopted to transform the hoisting machine to complete the constant torque control in the whole frequency range. For safety thinking, hydraulic machinery braking needs custody, and in the description of the process of the hydraulic mechanical braking and inverter braking to be combined. The load characteristic of the hoist is constant torque bit can load, starting torque is bigger, choose the frequency converter to leave proper margin appropriately. Because the hoist motor is in the electric state for the most part, only a small amount of regenerative energy occurs. When the inverter is connected to a braking unit and braking resistor, it can satisfy the regenerative braking when the heavy vehicle descends. Down. Hydraulic mechanical brake is controlled by the original control system and the inverter. The mechanical brake is controlled by the inverter's frequency reaching the port. When the inverter starts, the output frequency reaches the set value. After the elevator through the frequency conversion transformation, the system operation process change is not big.

     Hoist chain can make the whole hoist machine to complete more useful operating conditions, to reach the technical transformation of efficient forms of operation.