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    • 5. 发明授权
    • Process and apparatus for the production of ferrochromium
    • 用于生产铬铁的方法和设备
    • US4981510A
    • 1991-01-01
    • US389591
    • 1989-08-04
    • Wilhelm JanssenKlaus Ulrich
    • Wilhelm JanssenKlaus Ulrich
    • C22B5/10C22B34/32C22C33/04F27B7/02F27B7/20F27B7/38F27D13/00
    • C22B5/10C22B34/32F27B7/02F27B7/2016F27B7/383F27D13/00
    • A process and apparatus for producing ferrochromium having a carbon content ranging from about 0.02 to about 10 weight percent includes providing a mixture comprised of iron-containing chromium ore, coal, and at least one slag former selected from each of a slag former of group (a) and a slag former of group (b), wherein the slag former of group (a) is selected from the group consisting of CaO and MgO, wherein the slag former of group (b) is selected from the group consisting of Al.sub.2 O.sub.3 and SiO.sub.2, and wherein the mixture has an ore or coal ratio ranging from 1:0.4 to 1:2. The mixture is heated in a rotary furnace for a period ranging from 20 to 240 minutes in a CO-containing atmosphere and at a temperature ranging from 1480.degree. to 1580.degree. C. to provide a reaction product. The reaction product is discharged from the rotary furnace in a doughy state and is cooled, either during or after discharging the reaction product from the rotary furnace, by mixing the reaction product with at least one additive effective for heating and decarbonation for a subsequent melting step, which at least one additive is at ambient temperature prior to being admixed, so that the mixture has a reduced temperature and is in a solid state as it is conveyed to a melting furnace. Finally, the mixture is melted in the melting furnace as a temperature ranging from 1600.degree. to 1700.degree. C. to obtain ferrochromium.
    • 一种用于生产碳含量范围为约0.02至约10重量%的铬的方法和设备包括提供由含铁铬矿石,煤和至少一种选自每一种炉渣形成器 a)和组(b)的成矿剂,其中组(a)的成矿剂选自CaO和MgO,其中组(b)的炉渣形成体选自Al 2 O 3和 SiO 2,并且其中所述混合物的矿石或煤比范围为1:0.4至1:2。 将混合物在含CO气氛中,在1480℃至1580℃的温度范围内,在旋转炉中加热20至240分钟,以提供反应产物。 反应产物以旋转炉状态从旋转炉中排出,并且在反应产物从旋转炉排放期间或之后通过将反应产物与至少一种对加热和脱碳有效的添加剂混合进行冷却,用于随后的熔融步骤 ,其中至少一种添加剂在混合之前处于环境温度,使得混合物具有降低的温度,并且当其被输送到熔炉时处于固态。 最后,将混合物在1600〜1700℃的温度下在熔融炉中熔融,得到铬铁。
    • 9. 发明授权
    • Method for operating a frequency converter of a generator
    • 用于操作发电机的变频器的方法
    • US07787266B2
    • 2010-08-31
    • US10571735
    • 2003-09-16
    • Wilhelm JanssenDetlef Menke
    • Wilhelm JanssenDetlef Menke
    • H02M5/458H02M5/45
    • H02J3/383H02J3/386H02M5/4585H02M2001/0048Y02B70/1491Y02E10/563Y02E10/763
    • The method relates to the operation of a frequency converter of a generator in particular of a wind energy turbine, in the event of a substantial grid voltage drop, wherein the frequency converter (10) comprises an AC/DC converter (20), to be connected to the generator (14), a DC/AC converter (22) to be connected to the voltage grid (18), and a DC link circuit (24) for connecting the AC/DC converter (20) to the DC/AC converter (22). The method comprises the step of reducing an output voltage of the DC link circuit (24) for increasing an output current of the DC/AC converter (22) and/or reducing the operation frequency of electronic switches (28) of the DC/AC converter (22) for increasing the output current of the DC/AC converter (22).
    • 该方法涉及在发生大量电网电压降的情况下特别是风力涡轮机的发电机的变频器的操作,其中变频器(10)包括AC / DC转换器(20) 连接到发电机(14),连接到电网(18)的DC / AC转换器(22)和用于将AC / DC转换器(20)连接到DC / AC的DC链路电路(24) 转换器(22)。 该方法包括降低DC链路电路(24)的输出电压以增加DC / AC转换器(22)的输出电流和/或降低DC / AC电子开关(28)的工作频率的步骤 转换器(22),用于增加DC / AC转换器(22)的输出电流。
    • 10. 发明申请
    • Wind Turbine Over-Voltage Exposure
    • 风力发电机过电压曝光
    • US20070035136A1
    • 2007-02-15
    • US11461225
    • 2006-07-31
    • Wilhelm Janssen
    • Wilhelm Janssen
    • F03D9/00H02P9/04
    • F03D9/255F03D15/10H02H9/041Y02E10/725
    • The present invention relates to s wind turbine having a power generator for generating power for a first power line of a power grid; said wind turbine comprising a first transformer having a first primary coil connected to said power generator and a first secondary coil connected to said first power line for transforming a first primary voltage (vp1) across said first primary coil to a first secondary voltage (vs1) across said first secondary coil; further, the wind turbine according to the invention comprises a first electric circuit connected to said first primary coil; said first electric circuit having a first switching element for providing a first current path parallel to said first primary coil if said first secondary voltage (vs1) exceeds a predetermined first voltage limit value.
    • 本发明涉及一种风力涡轮机,具有用于为电网的第一电力线路发电的功率发生器; 所述风力涡轮机包括具有连接到所述发电机的第一初级线圈的第一变压器和连接到所述第一电力线的第一次级线圈,用于将跨越所述第一初级线圈的第一初级电压(vp 1)变换为第一次级电压(vs 1)穿过所述第一次级线圈; 此外,根据本发明的风力涡轮机包括连接到所述第一初级线圈的第一电路; 所述第一电路具有第一开关元件,用于如果所述第一次级电压(vs 1)超过预定的第一电压限制值,则提供与所述第一初级线圈平行的第一电流通路。