Today, in the 21st century, the global energy is in short supply, and the call for energy saving is getting louder and louder. Advanced energy saving technology has gradually become a bright spot in society. In many energy-saving enterprises, it is generally believed that ball mills are difficult to control. The amount of electricity consumed by electrical equipment is determined by its electromechanical characteristics, and subjective control is helpless. Obviously, this notion is wrong. In severe electricity situation, SINOVO inverter uses advanced frequency conversion energy-saving technical measures to minimize the energy consumption of ball mills, which not only protects the environment but also creates economic benefits for enterprises, and enterprises can reduce operating costs by at least 5-10%.
1. System performance requirements
There are problems in the original working conditions and combined with the requirements of the production process, the ball mill system after transformation should meet the following requirements:
(1) After the transformation, the equipment should have enough starting torque to meet the requirements of large loading capacity of the ball mill, and ensure the smooth operation of the motor under the frequency conversion operation of the equipment, so as to ensure that the motor has constant power characteristics;
(2) Use the frequency conversion speed control system to transform the original ball mill drive system to meet the normal operation of the ball mill at low speed, ensure the normal process control requirements, prolong the service life of the ball mill and the motor, and reduce maintenance.
2. Frequency converter selection
Based on the above principles, choose to use SINOVO SD300Q series inverters. This series of inverters has the following characteristics:
(1) This series is low-speed rated torque output, with strong load capacity, and can reach 180% rated torque output at low speed. It has a variety of torque boosts and V/F curves that can be set, a variety of acceleration and deceleration modes can be selected, built-in humanized PID function, and many parameters can be adjusted online.
(2) It has various complete protection functions and fault diagnosis systems, and has functions such as overvoltage, overcurrent and stall protection. Advanced technology, complete functions, easy to use, can meet the needs of electrical energy saving and various production process requirements.
(3) Various voltage levels, complete power specifications, and stable performance.
(4) The frequency accuracy is high, which can make the operation stable and meet the design requirements;
3. Application effect
After installing the frequency conversion energy-saving control system on the ball mill, the following effects have been achieved:
(1)After the transformation, the equipment can realize automatic control, as well as the mains/power-saving switching function, and can overcome the rebound voltage caused by the large inertia of the ball mill, effectively ensuring the normal operation of the equipment.
(2)Using the automatic voltage regulation function of the frequency converter, it can maintain the highest motor efficiency under the condition that it has nothing to do with the load. Due to the elimination of shock during starting, the service life of mechanical parts such as the crankshaft, gearbox gear, and belt is extended, and the maintenance cost is reduced.
(3)The driving system of the ball mill is improved by using frequency conversion speed regulation technology, which satisfies the characteristics of low speed operation and large starting torque of the ball mill, and realizes the continuous adjustment of the running speed of the ball mill. There is no inrush current when the motor starts, the starting torque is sufficient, and the protection function is perfect. The process control quality is guaranteed and the maintenance cost is saved.
(4) After the ball mill uses frequency conversion speed regulation, the starting current is reduced, realizing a real soft start, and also receiving energy-saving effects. The starting current is greatly reduced, which will not cause impact on the power grid and voltage drop of the power grid, and eliminate the tripping or failure of other electrical equipment caused by the start of the ball mill. Under the same power grid capacity, the number of installed machines can be increased.
(5) Built-in PLC multi-speed automatic operation function, the frequency converter can be used to conveniently set the grinding time, grinding time and automatic stop function, making the operation more intelligent and humanized.
(6) The energy-saving effect of the frequency conversion speed regulation energy-saving system of the ball mill can generally reach about 12%-15%.
Today, in the 21st century, the global energy is in short supply, and the call for energy saving is getting louder and louder. Advanced energy saving technology has gradually become a bright spot in society. In many energy-saving enterprises, it is generally believed that ball mills are difficult to control. The amount of electricity consumed by electrical equipment is determined by its electromechanical characteristics, and subjective control is helpless. Obviously, this notion is wrong. In severe electricity situation, SINOVO inverter uses advanced frequency conversion energy-saving technical measures to minimize the energy consumption of ball mills, which not only protects the environment but also creates economic benefits for enterprises, and enterprises can reduce operating costs by at least 5-10%.
1. System performance requirements
There are problems in the original working conditions and combined with the requirements of the production process, the ball mill system after transformation should meet the following requirements:
(1) After the transformation, the equipment should have enough starting torque to meet the requirements of large loading capacity of the ball mill, and ensure the smooth operation of the motor under the frequency conversion operation of the equipment, so as to ensure that the motor has constant power characteristics;
(2) Use the frequency conversion speed control system to transform the original ball mill drive system to meet the normal operation of the ball mill at low speed, ensure the normal process control requirements, prolong the service life of the ball mill and the motor, and reduce maintenance.
2. Frequency converter selection
Based on the above principles, choose to use SINOVO SD300Q series inverters. This series of inverters has the following characteristics:
(1) This series is low-speed rated torque output, with strong load capacity, and can reach 180% rated torque output at low speed. It has a variety of torque boosts and V/F curves that can be set, a variety of acceleration and deceleration modes can be selected, built-in humanized PID function, and many parameters can be adjusted online.
(2) It has various complete protection functions and fault diagnosis systems, and has functions such as overvoltage, overcurrent and stall protection. Advanced technology, complete functions, easy to use, can meet the needs of electrical energy saving and various production process requirements.
(3) Various voltage levels, complete power specifications, and stable performance.
(4) The frequency accuracy is high, which can make the operation stable and meet the design requirements;
3. Application effect
After installing the frequency conversion energy-saving control system on the ball mill, the following effects have been achieved:
(1)After the transformation, the equipment can realize automatic control, as well as the mains/power-saving switching function, and can overcome the rebound voltage caused by the large inertia of the ball mill, effectively ensuring the normal operation of the equipment.
(2)Using the automatic voltage regulation function of the frequency converter, it can maintain the highest motor efficiency under the condition that it has nothing to do with the load. Due to the elimination of shock during starting, the service life of mechanical parts such as the crankshaft, gearbox gear, and belt is extended, and the maintenance cost is reduced.
(3)The driving system of the ball mill is improved by using frequency conversion speed regulation technology, which satisfies the characteristics of low speed operation and large starting torque of the ball mill, and realizes the continuous adjustment of the running speed of the ball mill. There is no inrush current when the motor starts, the starting torque is sufficient, and the protection function is perfect. The process control quality is guaranteed and the maintenance cost is saved.
(4) After the ball mill uses frequency conversion speed regulation, the starting current is reduced, realizing a real soft start, and also receiving energy-saving effects. The starting current is greatly reduced, which will not cause impact on the power grid and voltage drop of the power grid, and eliminate the tripping or failure of other electrical equipment caused by the start of the ball mill. Under the same power grid capacity, the number of installed machines can be increased.
(5) Built-in PLC multi-speed automatic operation function, the frequency converter can be used to conveniently set the grinding time, grinding time and automatic stop function, making the operation more intelligent and humanized.
(6) The energy-saving effect of the frequency conversion speed regulation energy-saving system of the ball mill can generally reach about 12%-15%.
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