On October 23, 2018, a super-large sea-crossing bridge, which was jointly built by Guangdong, Hong Kong and Macao for the first time, was officially opened.
The Hong Kong-Zhuhai-Macao Bridge, which took 14 years to build, used the world's largest "steel" bridge section, with a main beam steel plate amounting to 420,000 tons. How are so many steel plates constructed? The cold-formed steel unit plays an important role.
With the large-scale development of bridges, bridges are required to develop in the direction of fully welded structures and high parameters, and their quality requirements are getting higher and higher. Bridge steel is required to have high strength, lightweight structures, excellent low temperature toughness, weldability and corrosion resistance. safety, reliability and longevity.
Hong Kong-Zhuhai-Macao Bridge Steel Structure
The steel produced by the cold-formed steel unit meets the requirements of bridge steel. Under the same load, it can reduce the weight of components and save materials. It is also widely used in metallurgy, construction, transportation, machinery, vehicles and other industries.
From a toddler in the cold-formed steel unit industry, Eneng Electric has provided customers with comprehensive solutions for the whole process of frequency converters. Eneng Electric continues to develop new technologies and launch new products to help the cold-formed steel unit industry develop in a more efficient and intelligent direction.
one. Workflow of cold-formed steel unit:
Uncoiling - leveling - cutting head welding - feeding - cold forming rolling - straightening - cutting, the frequency converter is mainly used in the rolling forming process.
two. The variable frequency speed regulation system has the advantages of smooth speed regulation, large starting torque and overload torque.
The new type unit uses three 37KW ordinary asynchronous motors to jointly drive the rolling shaft to run, requiring the three motors to equally distribute the load and run synchronously. Due to the complex cold-formed forming process of cold-formed products, the actual power consumption of the unit is large, and the mechanical loss of the drive shaft is different. In addition, the mechanical properties of the cold-formed forming material fluctuate greatly, the uncoiling straightness deviation of the coil material is large, and the thickness uniformity fluctuates. Large and other characteristics, the load characteristics change greatly during the rolling process of the product, and ordinary inverters are easy to cause faults such as overvoltage and overcurrent. The use of Yi Neng high-performance vector inverters can perfectly solve the overvoltage and overcurrent faults caused by uneven loads during operation, without adding electrical accessories such as braking resistors.
three. Control plan:
Use the first EN600-4T0370G/P inverter as the master and the other two as slaves. The master uses speed control, and the slave uses torque control. The output frequency and torque of the master is given to the two slaves through AO1 and AO2, so that the master and slave torques are the same, and the operating frequency of the two slaves is limited to not exceed the master.
Four. parameter settings
(1) Auto-tuning setting, F00.24=1, F15.01=37, F15.02=380, F15.03=68, F15.04=50, F15.05=1440, F15.06=2, F15 .19=1. After setting, press RUN key to perform static auto-tuning of motor parameters
(2) Host parameters: F00.00=2, F01.00=1, F01.15=1, F02.11=1, F09.35=2, F09.36=17, F19.43=100
(3) Slave parameters: F00.00=2, F01.15=1, F09.35=2, F09.36=16, F14.00=1, F14.13=002, F14.16=1, F14 .17=1, F19.43=100
The completion of the Hong Kong-Zhuhai-Macao Bridge means a further step in the national bridge technology, and the cold-formed steel unit has played a role as a catalyst. A strong country makes a strong country. Eneng Electric is willing to continue to exert its technological advantages in the cold-formed steel unit industry and accelerate the rise of my country's cold-formed steel unit industry.
Shenzhen Yineng Electric Technology Co., Ltd., a national high-tech enterprise with independent intellectual property rights, focuses on the research and development, production and sales of products in the field of industrial automation. The main products include frequency converters, servo controllers, PLCs, new energy systems, etc.
Founded in 2004, Eneng Electric has passed ISO9001:2008 quality management system certification, EU CE certification, won the National Innovation Fund, Shenzhen Strategic Emerging Industry Fund, Product Innovation Award, Most Investment Value Award and other honors, and has won many honors. It has won the title of "Top Ten Domestic Brands of Low-Voltage Frequency Converters".
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