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Meidensha Corporation |
Meidensha Corporation_20100121 |
Rotating electrical machine coil
According to the present invention, a wire insulation layer (112) and an interlayer insulation layer (113) are formed on a wire (111). A main insulation layer (114) is formed by winding highly thermally conductive mica tape. A first outer insulation layer (115) formed from heat-shrinking material and a second outer... Meidensha Corporation
Phase arms each formed by a series combination of semiconductor power modules are stacked, and the group of semiconductor power modules connected with positive connection conductor and the group of the semiconductor power modules connected with negative connection conductor are arranged in the same direction. There is formed an interspace... Meidensha Corporation
Method and device for modifying resin
It is a method for modifying a resin (6), the method for hydrophilizing the surface of the resin (6). High-concentration ozone gas and an unsaturated hydrocarbon gas are supplied to the surface of the resin (6), and the surface of the resin (6) is hydrophilized. The high-concentration ozone gas is... Meidensha Corporation
Dynamometer control device and estimating moment of inertia using same
To provide a dynamometer control device whereby excitation control can be performed so that a resonance phenomenon does not occur even when the moment of inertia of an engine is unknown. A dynamometer control device 6 is provided with an excitation signal generating unit 61 for generating a randomly or... Meidensha Corporation
A vacuum circuit breaker includes a ground tank, first and second vacuum interrupters, a link mechanism for opening and closing the vacuum interrupters and a link mechanism case housing the link mechanism and supported by an insulating support tube. An insulating operation rod for operating the link mechanism is provided... Meidensha Corporation
Field emission device and reforming treatment method
In a vacuum chamber (1), an emitter (3) and a target (7) are opposed to each other. A guard electrode (5) is disposed around an outer circumference of an electron generating portion (31) of the emitter (3). A supporting part (4) supports the emitter (3) movably in an end-to-end direction... Meidensha Corporation
Control device for dynamometer system
The purpose of the present invention is to provide a control device for a dynamometer system, with which, by a simple method, an unloaded state can be reproduced highly accurately when a test piece is started. A dynamo control device 6 is provided with: an integral control input computation unit... Meidensha Corporation
Three-phase neutral-point-clamped power conversion device
Current control section 2 performs PI control based on deviation between d-axis command current Id_cmd and d-axis detected current Id_det and deviation between q-axis command current Iq_cmd and q-axis detected current Iq_det. Neutral point potential control section 4 calculates corrected command voltage V_cmd′ by addition of neutral point control compensation... Meidensha Corporation
Method for manufacturing electrode material and electrode material
What is disclosed is an electrode material including a sintered body containing a heat resistant element and Cr and being infiltrated with a highly conductive material. A powder mixture of a heat resistant element powder and a Cr powder is subjected to a provisional sintering in advance, thereby causing solid... Meidensha Corporation
Torque command generation device
The purpose of the present invention is to provide a torque command generation device for generating a motor-generated-torque command that makes it possible to maximize excitation force while ensuring necessary acceleration, and the like, within a limited motor torque range. A torque command generation device (6) is provided with: a... Meidensha Corporation
A ceramic filter 20 has a porous support formed from particles containing a metal oxide as a main component and a membrane layer coated on a surface of the porous support and formed from particles containing the same kind of metal oxide as that of the porous support, wherein the... Meidensha Corporation
Process for producing electrode material, and electrode material
A process for producing an electrode material by infiltrating a highly conductive metal such as Cu into a porous object containing heat-resistant elements. Before an infiltration step in which the highly conductive metal is infiltrated, a HIP treatment is given to a powder containing the heat-resistant elements (or to a... Meidensha Corporation
Insulating structure for power conversion device
Due to increase of demand for safety of device, reinforcement of insulation of exposed conductive parts is required also in power conversion device. Relay unit having optical transmission unit, signal processing unit and power generating unit is provided between control circuit unit and gate drive circuit unit which form control... Meidensha Corporation
Method for autonomous operation of electricity-generating device
When it is not possible for a power generation device to operate coupled to an electric power system, an autonomous operation of connection and disconnection of a load of the power generation device is performed along an efficiency-characteristics curve within a speed range from a rated speed to a maximum... Meidensha Corporation
Considering a case that a device requiring electric power is arranged in a room where an actuator such as an automatic driving device is disposed, a power cable, a control signal cable, and an electric power cable for the actuator are arranged in parallel and extended in one direction, and... Meidensha Corporation
A resonant load power conversion apparatus is provided to lower a switching frequency of each switching device and to reduce the number of main circuit conductors. The conversion apparatus includes a single-phase inverter having a dc input side (Vdc) connected with a dc voltage source and an output side (Vout)... Meidensha Corporation
A method for producing an electrode material, involving: (i) a step of preparing a powder of a solid solution of Cr and a heat resistant material selected from the group consisting of Mo, W, Ta, Nb, V and Zr, wherein either a peak corresponding to Cr element or a peak... Meidensha Corporation
Method for producing electrode material
A method for producing an electrode material, provided to involve: (i) a provisional sintering step of sintering a mixed powder containing a powder of a heat resistant element and a powder of Cr to obtain a solid solution where the heat resistant element and Cr are dissolved; (ii) a pulverizing... Meidensha Corporation