The crusher is the main equipment of mine excavation, which is used to complete the process of turning large blocks into small blocks for the processing of excavated ore. The belt covered mobile crushing plant is a kind of equipment integrating crushing and screening developed in recent years, which can crush the ore on site and move with the advancement of the raw material excavation face.
The belt-covered mobile crushing plant has the characteristics of convenient installation, flexible mobility, and can save a lot of infrastructure and relocation costs.
The crawler walking power is supplied by the hydraulic equipment driven by the generator of the equipment, while the power of other crushing, screening and conveying mechanisms is supplied by the external power supply of multiple asynchronous motors.
At present, the mobile crushing plant has been widely used in stone excavation, mining, chemical industry, building materials and other industries.
The mobile crushing plant produced by a domestic company has many asynchronous motors, and the largest power is the main crushing motor of 315KW.
Since most of the mines are powered by generators in the wilderness, if the motor directly starts the impulse current is an additional 5-7 times, the generator capacity should be very large.
If you can find a way to reduce the motor current, you can reduce the capacity of the generator, and then save the cost of equipment maintenance and improve customer competitiveness.
As a result, INVT provided customers with GD300-EP series special inverters, and the customer's problems were solved.
GD300-EP is a special product developed by INVT for shore power supply, EPS emergency system, fire emergency power supply, soft start motor, industrial frequency switching, voltage and frequency stabilization power supply, etc., which has the function of mains synclock control, real-time monitoring of input voltage and adjustment of output voltage, phase, fluctuation and power grid consistent.
INVT GD300-EP inverter plan
When the main motor of the mobile crushing plant is working normally, there is no need to reduce the frequency of 50HZ operation, so the frequency conversion engine is selected to slowly speed up the motor to 50HZ, and then switch to the power frequency operation.
In order to save capital money, the power of the inverter can be half of the motor power, the motor is 315KW, and the inverter is 160KW.
In order to improve the starting effect, the frequency conversion controls the mains synchronous locking phase, and carries out non-disturbance switching, so as to keep the instantaneous current of the frequency conversion cutting frequency stable and impactless.
INVT Program Advantages
(1) Through the frequency conversion to the power frequency, the starting current is controlled below the additional current of the motor, and there is no impact on the generator at all.
(2) The speed of the equipment motor rises slowly, there is no mechanical impact at all, the service life of the equipment is extended, and the maintenance cost is reduced.
(3) Using advanced non-disturbance switching skills, the frequency conversion operation to 50HZ actively switches to the power frequency, the switching is stable, and the degree of automation is high.
(4) Dozens of built-in maintenance of frequency conversion can be used for the frequency conversion itself and equipment maintenance.
(5) The selection of low-power variable frequency drive high-power motors saves capital and improves customer competitiveness.
The use of INVT GD300-EP series special inverter, stable operation, reliable switching, simple operation, economic investment. When starting, the motor current is controlled below the addition, which is completely adapted to the use environment and various requirements of the mobile crushing plant, and has excellent economic benefits.
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