Abstract:
PROBLEM TO BE SOLVED: To solve some defects in a spring preload system or in a manufacturing process of a slot-closing device that fixes a conductor or a winding bar to a slot. SOLUTION: The slot-closing device includes a sliding block 2 and a pressurizing piece 3. At least one spring element 4 is provided between the sliding block 2 and the pressurizing piece 3. The spring element 4 can apply a preload, by a mounting means cooperating with the sliding block and the pressurizing piece. Accordingly, by the assembly, mounted in advance, is constituted. After positioning the slot closing device 1 at the slot, the mounting means can position and mechanically move the slot closing device 1 for the spring force of at least one spring element from a first position to a controllable second position. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To specify a method for operating a converter circuit, and reduce thereby a harmonic component in system voltages of an AC voltage system connected with the converter circuit. SOLUTION: In the converter circuit which has a converter 2 having a large number of drivable power semiconductor switches and has a three-phase AC voltage system 1, the drivable power semiconductor switches are driven by means of a drive signal S A formed from a control signal S R , and the control signal S R is formed by adjusting an H-th harmonic component i NH of system currents to a system current set point value i NHref . In order to reduce a harmonic component in the system voltages, the system current set point value i NHref is formed by adjusting an H-th harmonic component of system voltages to a predeterminable system voltage set point value u NHref , the control difference from the H-th harmonic component of the system voltages and the system voltage set point value u NHref being weighted by a system impedance y NH determined with respect to the H-th harmonic component. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To eliminate the problems, wherein a first capacitive energy store is charged by a DC-voltage source and as a result, a higher loss is generated during a charging process, when a first switch is closed, and a second switch is opened. SOLUTION: A converter circuit is specified in which, in order to avoid losses to the greatest possible extent, a first inductance L1 is connected in series into the connection of a DC voltage source 1 of the converter circuit to a first switch S0 of the converter circuit, and in which, moreover, a second inductance L2 is connected in series into the connection of a second switch S1 of a switching group 2 of the converter circuit to the junction point between a second capacitive energy store CA and a second unidirectional non-drivable power semiconductor switch D2 of the switching group 2. Two further alternative converter circuits and also a method for operating the converter circuits are furthermore specified. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a cooling element having a improved cooling capacity. SOLUTION: The cooling element (1), which is composed of metal or a metallic alloy having at least one cooling rib (4) connected with a metal housing (11) of equipment to be cooled, is equipped a film 2 for conducting heat and insulating electricity, and the cooling element (1) possesses the same potential as that of the housing (11), and an electric circuit passing through the housing (11) and a path for leading out the heat are completely separated from each other even though there is close connection between the housing (11) and the cooling element (1). COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for operating a transformer from a drivable power source. SOLUTION: The method for operating the transformer from the drivable power source comprises the steps of generating an output voltage (uA) to supply a valid power and/or a reactive component from a power (2) to an AC voltage supply network (3) through a transformer (1), monitoring an output current (iA) from the power source (2) with respect to a maximum allowed value (iA max ), in this case the magnetic flux (Φ) of the transformer (1) is determined continuously, and disconnecting the power source (2) from the transformer (1) when the current (iA) exceeds the value (iA max ). COPYRIGHT: (C)2003,JPO
Abstract translation:要解决的问题:提供一种用于从可驱动电源操作变压器的方法和装置。 解决方案:用于从可驱动电源操作变压器的方法包括以下步骤:产生输出电压(uA),以从电源(2)向AC电压供应网络提供有效功率和/或无功分量 (3)通过变压器(1),相对于最大允许值(iA max SB>)监视来自电源(2)的输出电流(iA),在这种情况下,磁通量 当电流(iA)超过值(iA max SB>)时,连续地确定变压器(1)的Φ,并断开电源(2)与变压器(1)的连接。 版权所有(C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a wind energy system wherein, if any rectifier instrument of the system becomes faulty, the other components of the system can be continuously used without interruption. SOLUTION: The wind energy system is constituted so that system comprises at least two generators (2) driven by wind power rotors (1); rectifier instruments (3) which are installed for the individual generators (2) and whose inputs are connected with the relevant generators (2); energy storage circuits (4) which are for the individual rectifier instruments (3) and connected with the outputs of the relevant rectifier instruments (3); a first bus bar system (7) with which the energy storage circuits (4) are connected in parallel; a transmission system (8) connected with the first bus bar system (7); and an electrical circuit network coupling device (15) whose input is connected with the transmission system (8), and which is coupled with an AC voltage supply network through network transformers (16). COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a converter circuit for maintaining the voltage of an electrical AC supply network. SOLUTION: This converter circuit is specified for voltage maintenance in an electrical AC supply network (1). The electrical AC supply network (1) has an associated voltage source (UR, US, UT) for each phase (R, S, T) to supply energy to an electrical load (2). The converter circuit has an inverter (3) for each phase (R, S, T), which is connected to a supply device (5) on the DC side via an energy-storage capacitor (4). On the AC side, the respective inverters. (3) are connected in series between the associated voltage source (UR, US, UT) and the electrical load (2) in the phase (R, S, T). On the AC side, the supply device (5) is connected to at least the two phases (R, S, T) between the associated voltage sources (UR, US, UT) and the respective inverters (3).
Abstract:
PROBLEM TO BE SOLVED: To provide a method for melting a heavy metal-containing substance 4 by charging the heavy metal-containing substance 4 in a converter or rotary kiln useful as a melting furnace to melt the same by a burner 2 operated by gas containing oxygen in a ratio higher than air or oxygen 6 and fossil fuel 5 not only to form slag 10 but also to generate flue gas 7. SOLUTION: A burner 2 and/or liquid slag 10 is operated more intensively and reductively as Zn is converted to a gaseous phase and the generated gas is allowed to flow out of molten matter and mixed with flue gas to be discharged. When a heavy metal-containing substance 4 additionally contains Cu, the slag is always additionally operated by a liquid Fe regulus 13 in order to reduce Cu in the slag. The content of heavy metals in the slag 10 falls below a limit value required in the slag 10 for disposal treatment.
Abstract:
PROBLEM TO BE SOLVED: To more reduce the amount of unreacted ammonia and further more reduce NOX concentration in flue gas without much labor technically and also with respect to an apparatus and further with the advantageous cost. SOLUTION: Flue gas 7 produced in a first step is first mixed in a second stage with a gaseous mixture medium containing no oxygen or containing a less amount of oxygen, mixed gas 9 produced thereby is forced to stay in a residence zone at least for 0.3 second and then mix it with secondary air 10 in a third step for complete combustion. Further, a reducing agent 11 is previously added to the secondary air 10.