Application of FGI explosion-proof frequency inverter in coal mining
1.Introduction
In the process of coal mining, it is required to support and control the roof of the working face reliably, isolate the gob area, and prevent the gangue from flowing into the working face. The emulsion pump and hydraulic support are produced under such needs, which provides the required power for the hydraulic support, thus ensuring the pressure of the emulsion is stable.
At present, the emulsified oil pumps in some mines still use power frequency start-up, which is easy to cause equipment damage and consume a lot of energy. This problem can be solved well by using frequency inverter in mine. The FGI explosion-proof frequency inverter device applies three-level frequency conversion speed regulation, which can not only make the emulsion pump motor soft start and soft stop, but also ensure the smooth operation of the system.
2.Difficulties in the routine use of emulsion pump
The conventional power frequency operation mode has disadvantages such as large starting current and large mechanical vibration, which seriously affects the normal operation of the device.
It always runs at full power, consumes a lot of power, and wastes electricity
The traditional manual adjustment method has some disadvantages such as low precision and long time lag.
3.FGI solution
It adopts three-level topology structure and uses low-voltage power device to realize medium-voltage inverter output, which has high reliability.
Frequency inverter with PID control to ensure constant voltage control;
The power input terminal adopts the wide power grid design of 970V~1310V, which can meet the harsh network environment of the mine;
Direct water supply heat dissipation mode, simple process and maintenance-free;
With power frequency switching function, can achieve a drag more control;
The starting torque can reach 220% of the rated torque of the motor, realizing heavy starting and adapting to load mutations.
4. Application cases
Customer: Shanxi Huangtupo Xin Coal Industry Co., LTD
Add: Qinyuan County, Changzhi City, Shanxi Province
Model: BPJ4-500/1140
5.application performance
FGI explosion-proof inverter with PID regulation, to achieve constant voltage automatic control, energy saving effect is remarkable, energy saving 20%;
The use of FGI explosion-proof inverter can reduce the use of relief valves, reduce mechanical loss, and reduce losses by 30%;
FGI explosion-proof inverter with power conversion switching function, flexible application, low system cost;
FGI explosion-proof inverter has good overload capacity and environmental adaptability, and high operation reliability;
FGI explosion-proof inverter with over voltage, over current, lack of phase, overload, over temperature and other problems with protection function, the system protection is comprehensive.
