The power consumption of the crusher is relatively high, which accounts for a large proportion of the cost. In order to improve the production efficiency of the crusher, and to reduce energy consumption and cost for the enterprise, we can transform it by applying the variable frequency drive (VFD) of the crusher.
At present, there are many crushers that use power frequency direct start or self-coupled step-down to start. The characteristic of this start-up method is that the impact current is large, which adds a lot of burden to the capacity requirements of the transformer. If it is often started and stopped, it will be harmful to the equipment. Shock and mechanical wear are also high. In addition, the use of power frequency and soft start will have higher requirements on the grid voltage, and it is easy to cause trip protection and burn out contactors. Users can choose vector VFD, which can maximize the actual efficiency of the motor. The input voltage range of plus or minus 15% can be started without pressure, reducing the heating of the motor, which can not only prolong the service life, but also achieve the purpose of saving electricity.
Crusher can crush a variety of stone materials. According to the principle of crushing and the particle size of the product, the crusher can be classified into many models. The more common ones are jaw crusher, impact crusher, vertical impact crusher, hydraulic cone crusher, and hammer crusher. Crusher is common in industries such as mining, smelting, building materials, roads, railways, water conservancy and chemical industries.
What are the advantages of applying VFD to crushers?
1. It has the function of adjustable acceleration and deceleration time, which can realize the smooth start of the motor, the mechanical impact is small, the maintenance cost is reduced, and the impact on the power grid is reduced;
2. With accurate speed control capability, the user can adjust the speed according to the material and output granularity required by the user. The output torque of the crusher controlled by frequency conversion can be changed with the change of the load, thus effectively improving the efficiency;
3. With the effect of energy saving, the motor speed can be adjusted according to the materials crushed by the machine, so as to improve efficiency and save electric energy;
4. VFD can effectively reduce the peak value of the starting current to the lowest level, reduce the starting impact current, reduce the capacity requirements of the transformer, reduce the impact and wear of the hardware, and prolong the service life of the crusher;
5. The VFD has a large starting torque, 0.5Hz in vector mode can reach 150% load, and 1.0Hz in VF mode can reach 150% load, which fully meets the requirements of low-frequency start-up and heavy load of the crusher;
6. VFD has complete protection functions, which can realize over-voltage, over-current, under-voltage, overload, short-circuit, and lack of phase protection functions to ensure stable operation of the motor, reduce vibration, impact and noise, and provide a good working environment.
How to choose the appropriate frequency conversion equipment for the crusher?
Since the load of the crusher is not constant, with the change of the size of the crushing object, the load of the feeding material jumps greatly, and the VFD is required to have a large starting torque and strong over-current capability. Therefore, the power selection of the VFD application of the crusher should be larger than that of the motor. files.
The power consumption of the crusher is relatively high, which accounts for a large proportion of the cost. In order to improve the production efficiency of the crusher, and to reduce energy consumption and cost for the enterprise, we can transform it by applying the variable frequency drive (VFD) of the crusher.
At present, there are many crushers that use power frequency direct start or self-coupled step-down to start. The characteristic of this start-up method is that the impact current is large, which adds a lot of burden to the capacity requirements of the transformer. If it is often started and stopped, it will be harmful to the equipment. Shock and mechanical wear are also high. In addition, the use of power frequency and soft start will have higher requirements on the grid voltage, and it is easy to cause trip protection and burn out contactors. Users can choose vector VFD, which can maximize the actual efficiency of the motor. The input voltage range of plus or minus 15% can be started without pressure, reducing the heating of the motor, which can not only prolong the service life, but also achieve the purpose of saving electricity.
Crusher can crush a variety of stone materials. According to the principle of crushing and the particle size of the product, the crusher can be classified into many models. The more common ones are jaw crusher, impact crusher, vertical impact crusher, hydraulic cone crusher, and hammer crusher. Crusher is common in industries such as mining, smelting, building materials, roads, railways, water conservancy and chemical industries.
What are the advantages of applying VFD to crushers?
1. It has the function of adjustable acceleration and deceleration time, which can realize the smooth start of the motor, the mechanical impact is small, the maintenance cost is reduced, and the impact on the power grid is reduced;
2. With accurate speed control capability, the user can adjust the speed according to the material and output granularity required by the user. The output torque of the crusher controlled by frequency conversion can be changed with the change of the load, thus effectively improving the efficiency;
3. With the effect of energy saving, the motor speed can be adjusted according to the materials crushed by the machine, so as to improve efficiency and save electric energy;
4. VFD can effectively reduce the peak value of the starting current to the lowest level, reduce the starting impact current, reduce the capacity requirements of the transformer, reduce the impact and wear of the hardware, and prolong the service life of the crusher;
5. The VFD has a large starting torque, 0.5Hz in vector mode can reach 150% load, and 1.0Hz in VF mode can reach 150% load, which fully meets the requirements of low-frequency start-up and heavy load of the crusher;
6. VFD has complete protection functions, which can realize over-voltage, over-current, under-voltage, overload, short-circuit, and lack of phase protection functions to ensure stable operation of the motor, reduce vibration, impact and noise, and provide a good working environment.
How to choose the appropriate frequency conversion equipment for the crusher?
Since the load of the crusher is not constant, with the change of the size of the crushing object, the load of the feeding material jumps greatly, and the VFD is required to have a large starting torque and strong over-current capability. Therefore, the power selection of the VFD application of the crusher should be larger than that of the motor. files.
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