Inverters and switchgear are solutions in the process of using motors and bring many benefits to cranes. However, the inverter is a very effective solution. So what are the benefits? Let's find out with us in the article "Why should we renovate the crane system with inverter instead of using switchgear?"
Crane systems are widely used in manufacturing plants, the process of lifting and transporting goods with large volumes to help reduce the labor force of workers and improve labor productivity.
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Why improve the crane system with inverter instead of using switchgear?
In particular, the main engines in the crane system include:
– Motor for lifting goods, depending on the level of crane Motor from 15kW to 160kW (depending on the system.
– Motor rotates the body, including 2 motors, each motor is 5.5kW (for construction tower crane). Includes 02 motor side beams (for cranes, gantry cranes, cranes).
- Motor pulls the turtle.
In the construction crane system, the lifting motor part bears the heaviest load. Depending on the rating of the crane from a few tons to several tens of tons and also depending on the use of double cables (cable 02) and two quad cables (cable 04). The tower crane body rotation motor is also a heavy load and the start/stop control is also very complicated without the use of an inverter.
In the crane system, the operator usually controls the motor directly by the switchgear for the lifting and lowering of the load in the crane system, however, this method has not completely solved the problems due to the characteristics of the crane. The organic running motor causes, like:
– On the other hand, direct starting, star-delta starting causes a voltage drop in the grid, affecting other equipment in the plant.
=> I think, the inverter should be considered and become a reasonable solution, because of the benefits of the inverter as well as the above difficulties in the process of using the motor for the crane.
Benefits in terms of system operation
The inverter acts as a soft starter, when the motor starts, the motor's starting current decreases and equals the rated working current, so it has little influence on surrounding devices and brings benefits such as: :
- Stabilize the quality of the power network.
- Reduce heat loss on conductors.
- Overcoming voltage drop on the power grid.
– Smooth start and stop of the load, reduce motor noise.
– Increase the life of welds on crane girders and mechanical accessories such as gears, etc.
– Safer for workers operating crane girders no longer shake.
– The inverter will report an error and disconnect the power of 2 motors when one of the two motors fails, helping to increase the safety of the system.
- Control of multi-speed lifting mechanism: application in plating industry, ...
Economic benefits
Installing an inverter in the crane is the optimal solution for equipment and saves energy.
Please contact us for more details:
Quang Trung INDUSTRIAL GROUP JOINT STOCK COMPANY
Representative office address at: Lot 33 Villa 4 Linh Dam Peninsula Hoang Mai, Hanoi
Phone: 0379645086
Email: tapdoanquangtrunggroup@gmail.com
