It is pointed out that the AC/DC integrated de-excitation protection can be used as the preferred solution for the de-magnetization protection of large hydro-generator rotors. In the figure: Ufr-excitation power supply FMK excitation circuit breaking device LQ-generator rotor winding F-generator
K{(Mg,Fe) 3 [AlSi 3 O 10 ](OH) 2 }—K{Mg 3 [AlSi 3 O 10 ](OH) 2 } [Chemical composition] phlogopite and biotite form a completely isomorphic series between a Mg-Fe, when Mg:Fe <2:1 when biotite, when Mg:Fe> 2:1 when phlogopite. Instead of K, there are Na, Ca, Rb, Cs, and Ba. In place of
Henan is not only an important wheat consumption area, but also the main production area of ​​wheat in China. In recent years, many high-yield grain fields in the region have transformed into high-quality wheat bases, which have made important contributions to the high yiel
Introduction: The price of new large-scale machinery and equipment is relatively high, and many companies will choose to purchase second-hand machinery. For example, used glass machinery is much cheaper than new ones. To a certain extent, it can reduce production costs, but the length of i
In the first four months of 2017, Audi suffered a decline in its product strength and disagreement among dealers, and its sales in China fell to the third place in luxury brands. The online auto market learned from FAW-Volkswagen that in the first five months, Audi sold 201,984 vehicles in China, d
Sheet metal forming is used to make a wide variety of parts, such as automobiles, airplanes, electrical appliances, household goods, arts and crafts, medical appliances and other parts. The traditional plastic processing production method is to design and manufacture the mold first, and then use th
ã€China Instrument Network Instrumentation Enterprise】On May 16th, Zhejiang Diyuan Instrument Co., Ltd. was invited to participate in the sponsorship of the Zhejiang Provincial Economic and Information Committee, Zhejiang Province Technology Innovation Service Center, Zhejiang Instrument