1.The problems of underground belt conveyor

Long transportation distance, large volume.

Low transmission efficiency, starting current impact and mechanical impact.

Motor drive power imbalance.

Most of the use of hydraulic couplers, there are problems such as large slip loss, low overall efficiency, poor speed regulation performance and so on.

2.The existing soft start driver configuration scheme shortcomings

Motor + speed regulating coupler + speed reducer + drive drum:

It covers a large area, low transmission efficiency, poor debugging accuracy and large maintenance workload

Motor + coupling +CST+ Drive drum:

Speed regulation performance is poor, transmission efficiency is low, power balance is poor

3.FGI belt conveyor system solutions

belt conveyor overall system diagram

FGI medium voltage drive six drive belt conveyor inverter master slave control solution

4.FGI Program Advantages

Real belt machine soft start. The slow start of the motor will slowly release the energy stored inside the belt, which can minimize the impact generated when the conveyor starts and stops, almost no damage to the belt;

Reduce the tape strength. The extended start-up time of frequency conversion reduces the requirement for tape strength and reduces the initial investment of equipment. The starting impact is reduced, the loss of mechanical system is reduced, and the life of rollers and rollers is extended.

Achieve the torque balance when the belt conveyor is driven by multiple motors. Multi-motor drive adopts master-slave or coordination cabinet control mode to achieve torque balance;

Tape test function. Low speed belt check function is the requirement of belt machine maintenance. Any tape speed within the rated band speed range of 0 ~ 100% can be adjusted under no-load test condition;

Smooth reload startup. Inverter low frequency operation can output 2.2 times rated torque, suitable for heavy load start;

Automatic speed regulation. The frequency converter with the coal flow sensor can automatically adjust the belt speed according to the load weight, reducing the belt wear;

Energy saving. A separate control system is used to measure the front load and the local load respectively, which can control the frequency converter to slow down or raise the speed in advance. For the belt conveyor system with uneven load, it can save energy and reduce the wear of the belt.

5.FGI case

A coal mine in Dafang County, Guizhou

Shanxi Lingshi coal industry