Abstract:
PROBLEM TO BE SOLVED: To provide an opposite conductivity type semiconductor device having improved electrical and thermal property. SOLUTION: A reverse conducting type semiconductor device 200 including an electrically active region has a free wheel diode and an insulation gate bipolar transistor on a common wafer 100. A part of the wafer 100 forms a base layer 101 having the thickness of a base layer 102. A first layer 1 of a first conductive type having at least one first region 10 and a second layer 2 of a second conductive type having at least one second region 20 and one third region 22 are alternately arranged on the collector side 103. Each region has a region area of region width 11, 21, and 23 wherein the periphery is surrounded by a region boundary. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a puffer circuit breaker with a valve for releasing overpressure in a puffer volume. SOLUTION: The circuit breaker includes a puffer volume 9, and at least one overpressure valve 16 for discharging gas from the puffer volume 9 if the pressure therein exceeds a given threshold. The overpressure valve 16 comprises a piston 17 and a spring 19 as well as a cavity 18 in a stationary support body of a movable contact assembly 2. The overpressure valve 16 is designed into compact and simple structure and has low hysteresis and large cross-section. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of monitoring the on-line deterioration of boiler tubes 15a, 15b in a large-scale combustion device, particularly, in a waste incinerating plant. SOLUTION: The deterioration, particularly, corrosion of the tube, or the accumulation of deposits are determined, more or less, in a continuously way in the state of operating the combustion device. The method is, therefore, not limited to optical inspection during a resting time. The speed of the deterioration or its accumulation relates to an operation mode for facilities. An adequate deterioration sensor 4 is arranged outside a flue gas region 14 where the boiler tube is exposed to harmful flue gas from a combustion process for receiving ultrasonic signals from a space or a capacity in the flue gas region 14. A test/tube 40 is provided exclusively for monitoring the progress of the deterioration. It is incorporated in the flue gas region 14 where it is particularly influenced by corrosion. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide compact design improved for a grounding switch of a gas-insulated switch gear arrangement. SOLUTION: A mounting cover (10) of the gas-insulated switch gear arrangement (15) has a physical space (100) formed in a hollow shape expanding a gas chamber (9). A grounding switch fixed contact (12) is mounted at the inner side (10e) of the mounting cover (10) to be at least partially received to the physical space (100) of the mounting cover (10). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a high-current switching arrangement for incorporation in a generator duct, which is characterized by limited spatial conditions, and at the same time is simple to construct and easy to incorporate into the duct.SOLUTION: A breaker pole is provided with an active component 20, which is arranged along an axis A, is designed for the conduction and interruption of high currents, and incorporates a power switching point, with two axially spaced current terminals 23 and 24 for the electrically-conductive integration of the active component 20 upon the incorporation of the high-current switching arrangement in the circuit path of a high-voltage conductor in a generator duct. In order to limit spatial conditions and to simplify the configuration and repair of the high-current switching arrangement, a drive is arranged on a first end face 11 of two end faces of a pole frame 10, oriented transversely to the axis A, and a linkage mechanism 50 transmitting power from the drive 40 to the power switching point is routed through the first end face 11 of the pole frame 10 to the active component 20.
Abstract:
PROBLEM TO BE SOLVED: To provide a thermosiphon cooler arrangement capable of achieving elimination of heat from electric and/or electronic components with improved efficiency and flexibility.SOLUTION: A module 102 includes a guiding structure, an inlet 614 to take in cooling air, and an outlet 616 to discharge the cooling air later in an operating state of the module 102. The guiding structure 615 is installed so as to allow the cooling air to enter through the inlet 614 and to leave through the outlet 616 in the operating state of the module 102. The module 102 further includes a thermosiphon cooler 600 equipped with a condenser 602 for transmitting almost all thermal load to the cooling air in the operating state of the module 102 and an evaporator 604. The evaporator 604 is tilted with respect to the condenser 602, while the condenser 602 is arranged so that almost all cooling air flows through the condenser 602.
Abstract:
PROBLEM TO BE SOLVED: To provide a diode which has less leakage current and is optimized for soft turn off.SOLUTION: The diode has a drift layer 2 of a first conductivity type on a cathode side 13 and an anode layer 3 of a second conductivity type on an anode side 14. The anode layer 3 includes a diffused anode contact layer 5 and a double diffused anode buffer layer 4. The anode buffer layer 4 is arranged up to a depth of 18 μm to 25 μm, and has different doping concentrations in a depth of 5 μm and in a depth of 15 μm, resulting in good softness of the device and low leakage current. Anode layer doping concentrations of known diodes have either over all depths lower doping concentrations (resulting in high leakage current) or enhanced doping concentration (resulting in bad softness).