The speed of a large angle belt conveyor under different conditions

The high angle belt conveyor needs to change the belt speed in a timely manner under different operating conditions, especially during daily maintenance or belt operation according to the carrying capacity. This function is achieved through a frequency converter, which is the equipment of the entire drive system and also the control system that needs to control the equipment. The frequency converter mainly controls the speed of the motor. Before starting the belt, given different frequencies, observe the belt speed after it stabilizes, observe whether the belt speed changes, and enable it to achieve speed regulation function.

Another important function of the frequency converter is soft start and soft stop. When a fixed frequency is given, various parameters of the frequency converter are set, and an appropriate starting acceleration time is given to gradually increase the speed with the increase of frequency, and start according to the given starting curve, such as the S-shaped curve, and the slow acceleration of the large angle belt conveyor. This not only has a small impact on the electromechanical equipment, but also will not cause a sudden current several times greater than the rated current due to direct motor start, which will have a great impact on the power grid and make the power grid system very unstable, thereby impacting other electrical loads. These are all things we do not want to see.

Power balance is a very important aspect of this project and an important criterion for measuring the stability of the control system. Based on the edited power balance subroutine, observe the output power of each main motor and observe the adjustment of power balance for a long time under the condition of load changes. If the power balance adjustment is not ideal, such as motor overcurrent causing shutdown, or excessive power fluctuation of each motor, on the one hand, check the reducer or drive drum part to see if it is caused by mechanical parts. If all of these are normal, carefully check the program part of the power balance fuzzy controller, analyze and modify it carefully to ensure smooth operation of the large angle belt conveyor.

In order to create greater economic benefits for the control system, the goal of this article is to achieve different operating speeds for existing large angle belt conveyors according to different carrying capacities, in order to reduce energy consumption and reduce costs for enterprises. Therefore, during testing, two programs need to be edited. One program does not have an energy-saving adjustment part, while the other has an energy-saving adjustment part. First, while ensuring that the carrying capacity is basically the same, the program without the energy-saving part is run for a long time, and the consumed energy is recorded regularly. Then, the program with the energy-saving adjustment part is run. The running time is the same as without the energy-saving adjustment program, and the consumed energy in different states is also recorded. Later, it needs to be recorded. Compare data and calculate energy-saving effects, Later, the economic investment reduced by energy conservation was calculated.

When the power consumption of the load carried by a general motor is about 75% of the rated power, the motor efficiency is high. In the case of light load on the belt, reducing the belt speed appropriately per unit time is equivalent to increasing the coal load of the large angle belt conveyor, which improves the operating efficiency of the motor. At the same time, under the same load, according to the relationship between torque and power mentioned above, reducing the speed also reduces the load power. Therefore, choosing an appropriate speed can not only improve the operating efficiency of the motor, but also play a role in saving energy.