CNC Lower Exchange Nozzle
CNC Exchange Nozzle is divided into exchang Upper Nozzle and exchange lower nozzle,which saves the operation time and improves the efficiency of steelmaking . Tundish Manual Quick Change Mechanism actually replaces the CNC Lower Exchange Nozzle to achieve the smooth completion of continuous casting.
Anyang Jinrong Company is a professional manufacturer of refractory materials,mainly produce Zirconia Insert , Zirconia Tundish Nozzle ,Tundish Upper Nozzle, Tundish Lower Nozzle , Tundish Well Block ,Submerged Entry Nozzle,Ladle Nozzle,Ladle Upper Nozzle, Ladle Lower Nozzle, Ladle Slide Gate Plate,Porous Plug.Over the past 28 years, our company have become a leading refractory manufacturer at home and abroad.
Perfect business philosophy and strong production equipment, make the company become stronger.All the staff have established the ANYANG JINRONG brand with the supremacy of integrity,excellent quality and service, made outstanding contributions to the development of iron and steel industry in China and even in the word .
CNC lower exchange nozzle,tundish lower nozzle,quick change nozzle ANYANG JINRONG METALLURGICAL MATERIALS CO.,LTD , https://www.ladlenozzle.com
Harmonic sources refer to electrical equipment that injects harmonic currents into the utility grid or generates harmonic voltages in the utility grid. Most sources of harmonics are devices such as converters. There are usually two kinds of harmonic generation, one is generated on the input side of the inverter, and the principle is that there are harmonic waves caused by the non-linearity of the rectifier circuit on the power supply side. The second is to generate harmonics at the output side of the inverter. The principle is that in the inverter circuit, the output voltage is a rectangular wave for the voltage type circuit. For current-mode circuits, the output current is a square wave. The rectangular wave contains more harmonics. Therefore, it was concluded that there are harmonics in the power grid, mainly due to the existence of various nonlinear components in the power system.
In order to reduce the influence of the harmonics generated by the inverter on the power grid and cause more and more harmonic pollution of the power grid, inverter manufacturers pay great attention to the treatment of harmonics. Shenzhen Ampon Inverter manufacturers are among them. In the Ampon brand inverter products, the harmonic ratio is always controlled within the national standard, which is lower than 5%. At present, there are two methods used by Anbang for harmonic control. One is to install AC reactor and DC reactor. Device. The second is to install filters. These two kinds of harmonic treatment methods are currently the most common and most effective methods.
The following separately analyzes the principles of these two types of harmonic treatment methods. 1. Add AC reactors and DC reactors. When the inverter is used in the distribution transformer with a capacity of more than 500kva and the transformer capacity is more than 10 times of the capacity of the inverter, install an AC reactor at the input side of the inverter. When the output voltage of the distribution transformer is unbalanced and the unbalance ratio is greater than 3%, an AC reactor must be installed at this time.
2. Add passive filter: Passive filter is installed on the AC side of the inverter. Passive filter is composed of l, c, r components to form a harmonic resonance loop, when the harmonic frequency of lc loop and a certain high When the frequency of the subharmonic current is the same, high harmonics can be prevented from flowing into the grid.
3, equipped with a source filter: Active filter through the current in the higher harmonics detection, according to the input of the detection results with the higher harmonic components with opposite phase current, to achieve real-time harmonic current compensation purposes. Compared with passive filters, it has a high degree of controllability and fast response, and has a multi-energy feature. And can eliminate the danger of resonance with the system impedance.