摘要:
Method and apparatus for the manufacture of one-dimensional or multi-dimensional curved or angularly formed, preferably moldings of mineral wool, which is impregnated with a binder, in that a matching or chosen piece of binder impregnated mineral wool felt (9) or mineral wool is compressed between mold parts comprising a matrix (4) and a counter die (1), whereafter the matrix (4) and/or the counter die (1) cures the binder of the mineral wool body formed by the matrix and the counter die, whereby the mineral wool felt (9) is compressed in two or several steps, namely in at least a first step between the counter die (1) and a portion (5) of the matrix (4), whereafter the remaining part (6) of the matrix (4) in one or several successive steps is fold or pressed to the mineral wool felt (9), so that all remaining parts thereof are pressed to the counter die (1), whereby all parts of the mineral wool felt (9) is given a predetermined thickness.
摘要:
A powder for use in the powder metallurgical manufacture of components is provided. Particularly the subject matter concerns an iron or iron based powder intended for the powder metallurgical manufacturing of components. It is especially suitable for manufacturing of components wherein self-lubricating properties are desired. The subject matter further relates to a method of manufacturing a component from said powder and an accordingly produced component. A diffusion-bonded powder comprising iron or iron-based particles, and particles diffusion-bonded to the iron or iron-based particles is provided. The said particles diffusion-bonded to the iron or iron-based particles may comprise an alloy of Cu and 5% to 15% by weight of Sn. A component is provided which is at least partly formed from such a diffusion-bonded powder.
摘要:
An electronic apparatus includes a display panel connected to a body and able to occupy a first and second position with respect to the body, and an input panel connected to the body and able to occupy a first and second position with respect to the body. When the display panel and the input panel both occupy their respective first position, the input panel hides part of the display panel. When the display panel occupies its first position and the input panel occupies its second position, the display panel hides at least part of the input panel. When the display panel occupies its second position, the input panel is movable from its first position to its second position and/or movable from its second position to its first position.
摘要:
A bonded metallurgical powder composition including: an iron-based powder having a weight average particle size in the range of 20-60 μm, in an amount of at least 80 percent by weight of the composition, graphite powder in an amount between 0.15-1.0 percent by weight of the composition, a binding agent in an amount between 0.05-2.0 percent by weight of the composition, a flow agent in an amount between 0.001-0.2 percent by weight of the composition; wherein the graphite powder is bound to the iron-based powder particles by means of the binding agent, and wherein the powder composition has an apparent density of at least 3.10 g/cm3 and a hall flow rate of at most 30 s/50 g. Also, a method for producing a sintered component with improved strength from the inventive composition, as well as to a heat treated sintered component produced according to said method.
摘要翻译:一种粘结冶金粉末组合物,其包含:重量平均粒度在20-60μm范围内的铁基粉末,其量为组合物重量的至少80%,石墨粉末的量为0.15-1.0 组合物的重量百分数,组合物重量的0.05-2.0%的结合剂,组合物重量的0.001-0.2%的流动剂; 其中所述石墨粉末通过所述粘合剂与所述铁基粉末颗粒结合,并且其中所述粉末组合物的表观密度为至少3.10g / cm 3,并且霍尔流速为至多30s / 50g。 另外,本发明的组合物的强度提高的烧结体的制造方法以及根据所述方法制造的热处理烧结部件的方法。
摘要:
A metal powder composition including: an iron or iron-based powder composition, and a lubricating combination including a substance A, a substance B, and a substance C; wherein: substance A is a polyolefin, substance B is chosen from a group of saturated and unsaturated fatty acid amides, saturated and unsaturated fatty acid bisamides, saturated fatty alcohols and fatty acid glycerols, and substance C is an amide oligomer having a molecular weight between 500 g/mol and 30 000 g/mol; and wherein the amounts of respective substances A, B and C in weight percent of the iron or iron-based powder composition are: 0.05≦A+B 0.5. Also, a method of producing a metal powder composition and a method for producing a green component.
摘要翻译:一种金属粉末组合物,其包含:铁或铁基粉末组合物和包含物质A,物质B和物质C的润滑组合; 其中:物质A是聚烯烃,物质B选自饱和和不饱和脂肪酸酰胺,饱和和不饱和脂肪酸双酰胺,饱和脂肪醇和脂肪酸甘油的一组,物质C是一种酰胺低聚物,其分子量介于 500g / mol和30000g / mol; 并且其中以铁或铁基粉末组合物的重量百分比计的各物质A,B和C的量分别为:0.05&lt; NlE; A + B <0.4wt%,C≥0.3wt%,A + B + C&NlE; 2.0 重量%,物质A和物质B之间的关系为:B / A> 0.5。 另外,制造金属粉末组合物的方法以及绿色成分的制造方法。
摘要:
Exemplary embodiments of the present disclosure provide a method and controller for damping multimode electromagnetic oscillations in electric power systems which interconnect a plurality of generators and consumers. The controller for damping such oscillations includes a phasor measurement unit (PMU) and a power oscillation damper (POD) controller. Each oscillating mode signal is damped and then superposed to derive a control signal. A feedback controller is used to feedback the control signal to a power flow control device in the power system.
摘要:
The disclosure relates to a converter control unit or power system stabilizing unit for counteracting oscillations in electric power systems that is equipped and employed to provide and processes information for system-wide monitoring, protection, control and metering. It comprises means for synchronized (e.g. via GPS or another absolute/global time reference) sampling of voltages and/or currents, means for down-sampling in order to decrease the number of samples, and means for calculating phasors, i.e. time stamped amplitude and phase angle of the voltages and/or currents.
摘要:
A limitation of the interaction between cascaded tap changers and/or between a tap changer and a shunt compensator independently of any real-time communication between the respective controllers is disclosed. Coordinated voltage control in distribution networks can be achieved by an adaptive updating or tuning of control parameters DB4, TD4 of a voltage control unit controlling a second voltage control device, depending on instantaneous or actual operating conditions evaluated by the voltage control unit itself. Instead of using constant control parameters initially set by a commissioning engineer, the parameters are updated based on a voltage level UP4, which in turn is responsive to or affected by any control action performed by a first voltage control device neighboring the second voltage control device. The voltage control unit calculates a deviation of an instantaneous value of the voltage level from a reference value, and translates or maps this deviation to an update of its dead bands and/or time delay characteristics. Hence, the voltage control unit can anticipate, or determine a likelihood of, a control action of the first voltage control device, without the need for a real-time transmission of this information to the voltage control unit.
摘要:
Phasor measurement units (108) provide phasor data from various locations (102) in an electrical power system. The phasor data is referenced to a common timing signal. Non-phasor measurement data is also obtained at various locations in the power system. A phasor assisted state estimator (120) uses the phasor data and the non-phasor data to determine the power system state.
摘要:
A method for determining an equivalent impedance of a transmission section of an electrical network, includes representing the transmission section as having at least two interfaces with other sections of the network. For each interface, a voltage phasor and a current phasor flowing through the interface are determined from simultaneously made measurements at the interfaces. From the phasors, the equivalent impedance is calculated. The required simultaneousness of the phasor measurements is achieved by means of Phasor Measurement Units (PMUs) that are synchronized via the Global Positioning System (GPS).