Mine hoist is an important equipment in the production process of coal mine and nonferrous metal mine. The reliable operation of the elevator is directly related to the production situation and economic benefit of the company. In order to overcome the defects of the traditional communication winding motor series resistance speed regulation system, the frequency conversion speed regulation technology is used to transform the elevator, which can complete the constant torque control in the full frequency range. Hydraulic mechanical braking requirements are maintained and combined with transducer braking during the description process. The load characteristic of the hoist is the constant torque potential energy load and the starting torque is large. When selecting the inverter, there is a proper margin. Because the hoisting machine is in the electric state at most of the time, only in a small number of times there is renewable energy, inverter connected to a brake unit and brake resistance, can be satisfied with the heavy car down the regenerative braking, complete the smooth down. The hydraulic mechanical brake is controlled by the original control system and the frequency converter together. The mechanical brake is controlled by the frequency arrival port of the frequency converter. When starting, the output frequency of the frequency converter reaches the set value. After the transformation of the hoist by frequency conversion, the operating process of the system changes little.
The hoist chain can make the whole hoist complete more useful operating conditions, to reach the technical transformation of the operating form.
