I. INTRODUCTION At present, the industry generally believes that the transformation of high-frequency motor speed control is the main measure to reduce consumption and increase efficiency. In the fans and pumps these loads, the transformation of frequency conversion speed regulation, has been widely implemented. Its energy-saving effect has been fully recognized. How can the variable frequency speed regulation on the crusher load achieve the desired application?
Project Description Xiaoyi Pengfei Industrial Group Co., Ltd. was established in 1993. Under the leadership of Zheng Peng, the leader in the process of entrepreneurship and development, Pengfei people have the faith of “Today's glory is looking at Pengfei†and they are standing up. Strive to struggle, surpass oneself and pursue the limit on the road of survival and development, and achieved brilliant achievements today. With more than ten years of smart management, the company has become a diversified, high-tech, large-scale integrated private enterprise integrating clean coal production, coke manufacturing, gas power generation, ferrosilicon, metal magnesium smelting, health product beverage research and development and transportation logistics. . At present, the company has three clean coal production companies (six coal washing plants), two coking companies, one power plant, one ferroalloy company, one green food production company, one freight company, two trading companies, and five overseas offices. . The total assets of the company are 3.6 billion yuan, fixed assets 2.34 billion yuan, and current assets 1.26 billion yuan. With an annual output of 10 million tons of clean coal, 2 million tons of coke, 20,000 tons of metal magnesium, 25,000 tons of ferrosilicon, and 24,000 kilowatts of annual power generation, it has become one of the top 100 private enterprises in Shanxi Province, an outstanding enterprise in Shanxi Province, and Shanxi Provincial contracts and credit companies."
The variable frequency speed regulation project on the crusher load introduced this time is applied to the first-break coal load of the first phase of the 5 million-ton coking project of Pengfei Group.
Third, process introduction
Hammer crusher is mainly based on impact energy to complete the broken material operation. Hammer crusher work, the motor drives the rotor for high-speed rotation, the material into the crusher cavity, high-speed rotary hammer impact, shear tear material caused by the material is broken, at the same time, the gravity of the material itself to make the material from The high-speed rotating hammer rushes toward the baffle plate and screen bar in the frame body. In the lower part of the rotor, a sieve plate is provided, and the grain size smaller than the size of the sieve hole in the pulverized material is discharged through the sieve plate. The material larger than the size of the sieve hole is retained in the sieve plate. The hammers continue to be struck and ground until they are crushed to the desired discharge size and finally discharged through the screen plate.
Through the analysis of the working principle of the crusher, it can be seen that the crusher load nature: impact type load, the load is extremely unstable, it is easy to appear short-term large load, so the supporting frequency converter is required to have fast dynamic response capability, able to adapt to short-term super Rated load torque. Leader VA Series HV inverters are equipped with features that adapt to this load.
IV. Advantages of Leadow Vol. VA Series High-voltage Frequency Converters Leadew Vol. VA series high-voltage frequency inverters can easily implement vector control modes. In the vector mode, the inverter can directly control the magnetic flux and torque current when the load. When suddenly fluctuates, it causes the load torque to change. At this time, the frequency converter relies on the torque limiting function to control the torque fluctuation within a very small range, thereby solving the problem of overcurrent caused by the sudden increase of the load torque.
Leadewv's VA series high-voltage frequency inverters calculate torque very quickly, about 100 microseconds, so that they can respond to changes in load torque in a very short period of time.
Fifth, the effect of field applications If the use of power frequency grid to drive the crusher, you obviously feel the shock of the crusher amazing, and extremely easy over-current trip. With the use of Leadvaft's VA Series high-voltage frequency converters, motor speeds can be reduced according to process requirements. Power consumption is significantly reduced, and crusher and motor vibrations are significantly reduced. After using Leadow VA series high-voltage frequency converters, the crusher no longer trips at every turn, avoiding frequent start-ups and frequent impacts.
Project Description Xiaoyi Pengfei Industrial Group Co., Ltd. was established in 1993. Under the leadership of Zheng Peng, the leader in the process of entrepreneurship and development, Pengfei people have the faith of “Today's glory is looking at Pengfei†and they are standing up. Strive to struggle, surpass oneself and pursue the limit on the road of survival and development, and achieved brilliant achievements today. With more than ten years of smart management, the company has become a diversified, high-tech, large-scale integrated private enterprise integrating clean coal production, coke manufacturing, gas power generation, ferrosilicon, metal magnesium smelting, health product beverage research and development and transportation logistics. . At present, the company has three clean coal production companies (six coal washing plants), two coking companies, one power plant, one ferroalloy company, one green food production company, one freight company, two trading companies, and five overseas offices. . The total assets of the company are 3.6 billion yuan, fixed assets 2.34 billion yuan, and current assets 1.26 billion yuan. With an annual output of 10 million tons of clean coal, 2 million tons of coke, 20,000 tons of metal magnesium, 25,000 tons of ferrosilicon, and 24,000 kilowatts of annual power generation, it has become one of the top 100 private enterprises in Shanxi Province, an outstanding enterprise in Shanxi Province, and Shanxi Provincial contracts and credit companies."
Third, process introduction
Through the analysis of the working principle of the crusher, it can be seen that the crusher load nature: impact type load, the load is extremely unstable, it is easy to appear short-term large load, so the supporting frequency converter is required to have fast dynamic response capability, able to adapt to short-term super Rated load torque. Leader VA Series HV inverters are equipped with features that adapt to this load.
IV. Advantages of Leadow Vol. VA Series High-voltage Frequency Converters Leadew Vol. VA series high-voltage frequency inverters can easily implement vector control modes. In the vector mode, the inverter can directly control the magnetic flux and torque current when the load. When suddenly fluctuates, it causes the load torque to change. At this time, the frequency converter relies on the torque limiting function to control the torque fluctuation within a very small range, thereby solving the problem of overcurrent caused by the sudden increase of the load torque.
Leadewv's VA series high-voltage frequency inverters calculate torque very quickly, about 100 microseconds, so that they can respond to changes in load torque in a very short period of time.
Fifth, the effect of field applications If the use of power frequency grid to drive the crusher, you obviously feel the shock of the crusher amazing, and extremely easy over-current trip. With the use of Leadvaft's VA Series high-voltage frequency converters, motor speeds can be reduced according to process requirements. Power consumption is significantly reduced, and crusher and motor vibrations are significantly reduced. After using Leadow VA series high-voltage frequency converters, the crusher no longer trips at every turn, avoiding frequent start-ups and frequent impacts.
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