Case study of frequency conversion transformation of crusher

Background of frequency conversion transformation of crusher:

Traditional crushers usually use power frequency direct starting or self coupling voltage reduction starting methods, which have a large starting current, serious impact on the power grid, and also cause significant mechanical wear and tear on the equipment. In addition, this starting method cannot adjust the motor speed according to load changes, resulting in energy waste and low production efficiency. In order to improve the operating efficiency of the crusher, reduce energy consumption and maintenance costs, it is particularly important to carry out frequency conversion transformation on the crusher.

Solution:

For the frequency conversion transformation of the crusher, we have adopted the FST-650L series open-loop vector frequency converter with ANYHZ. This frequency converter has the following characteristics:

1. The acceleration and deceleration time can be adjusted to achieve smooth motor start-up, reducing mechanical impact and maintenance costs.

2. Accurate speed control capability, adjusting speed according to material and discharge particle size to improve work efficiency.

3. The energy-saving effect is significant. By adjusting the motor speed according to the material, efficiency can be improved and electricity can be saved.

4. Reduce the starting surge current, lower the requirements for transformer capacity, and extend the service life of equipment.

5. Powerful starting torque meets the requirements of low-frequency starting load capacity for crushers.

6. Complete protection functions ensure stable operation of the motor, reducing vibration, impact, and noise.

Implementation process:

In the process of implementing frequency conversion transformation, we first evaluated the motor and control system of the original crusher, and determined the model and parameters of the frequency converter. Then, the Derus ES300 series frequency converter was installed and debugged to ensure the matching of the frequency converter with the motor and the stability of the control system. During the debugging process, we paid special attention to starting up to the given frequency before feeding to prevent torque blockage at low frequencies. We also monitored the current during normal feeding to prevent a sharp increase in current during blockage.

Effect evaluation:

After the frequency conversion transformation, the operating efficiency of the crusher has been significantly improved. The specific effects are as follows: Improving the efficiency of crushing work: The variable frequency control system has precise speed control capability, which matches the torque output of the motor with the load, effectively improving the efficiency of work.
Energy conservation: Compared with traditional controlled crushers, energy conservation is the most practical. Adjust the motor speed based on the broken material to improve efficiency and save energy.
Extend the service life of the crusher: The frequency converter effectively reduces the peak value of the starting current to the lowest extent, extending the service life of the crushing motor.
Preventing motor damage: The frequency converter has excellent overcurrent protection function. In the event of equipment jamming or insufficient lubricating oil causing excessive motor load, the protection function of the frequency converter can effectively protect the motor from overload and burnout.

Conclusion:

Through the application of frequency converter technology, the crusher has achieved significant performance improvement and energy consumption reduction in the field of sand making from construction waste. It not only improves production efficiency but also reduces operating costs, achieving a win-win situation of economic and environmental benefits. In the future, frequency converter technology will play an important role in more fields, promoting the green transformation and sustainable development of industrial production.