Abstract: A motor drive device which drives a motor including a winding set and a winding set that are electrically separate from each other includes an inverter that outputs three-phase alternating currents to winding set, an inverter that outputs three-phase alternating currents to winding set, and controllers that output drive commands to inverter and inverter by generating PWM pulses. Controllers generate the PWM pulses such that the three-phase alternating currents that are output from inverter to winding set and the three-phase alternating currents that are output from inverter to winding set have reverse polarities in three respective phases.

Abstract: A compound represented by the following general formula (B1). Further disclosed is a corrosion inhibitor (B) containing one or more selected from the compound represented by the following formula (B1). Further disclosed is a lubricant composition containing an ionic liquid (A) and the corrosion inhibitor (B). The compound and the corrosion inhibitor are excellent in stability in any of a high vacuum, a low-temperature environment, a high-temperature environment, and an ordinary temperature-ordinary pressure environment, and the lubricant composition containing the corrosion inhibitor is excellent in metal corrosion resistance, solubility, and low evaporability. In the general formula (B1), M is an alkali metal and RB11 is an alkylene group having 1 to 19 carbon atoms.

Abstract: An object of the present invention is to provide a power conversion device configured to attain suppression of heat concentration and miniaturization of the device. The power conversion device 40 includes a power module 17 for converting dc power into ac power, a first circuit substrate (power circuit substrate) 16 including a capacitor 31 for smoothing the dc power, and a casing 20 for storing the power module 17 and the first circuit substrate 16. Either the first circuit substrate 16 or the power module 17 is disposed on an inner surface 20bb of a side wall 20b having an outer wall surface 20ba of the casing 20, and the other is disposed on a predetermined inner wall surface 20a of the casing 20 to form an angle with the inner surface 20bb.

Abstract: A layered-up veneer board is formed by layering veneers up to a predetermined height such that the fiber directions of the respective veneers are alternately perpendicular to one another, and the layered-up veneer board is compressed by a compression device, to remove moisture contained in the veneers. Wood is a material in which the tensile strength in the fiber direction of the wood is higher than the tensile strength in the direction perpendicular to the fiber direction. With this layering scheme, even when stress is applied to the veneers and causes elongational deformation of these veneers as a result of compressing the layered-up veneer boards in the layering direction, elongational deformation of the veneers in the directions perpendicular to the fiber directions thereof can be reduced.

Abstract: A layered-up veneer board is formed by layering veneers up to a predetermined height such that the fiber directions of the respective veneers are alternately perpendicular to one another, and the layered-up veneer board is compressed by a compression device, to remove moisture contained in the veneers. Wood is a material in which the tensile strength in the fiber direction of the wood is higher than the tensile strength in the direction perpendicular to the fiber direction. With this layering scheme, even when stress is applied to the veneers and causes elongational deformation of these veneers as a result of compressing the layered-up veneer boards in the layering direction, elongational deformation of the veneers in the directions perpendicular to the fiber directions thereof can be reduced.

Abstract: A power converter provided with a current detection circuit on a DC bus. A power semiconductor module is connected between the wiring pattern of the positive potential of the DC bus and the wiring pattern of the negative potential thereof. The smoothing capacitor and the snubber capacitor are connected between the wiring pattern of the positive potential of the DC bus and the wiring pattern of the negative potential thereof. The current detection circuit is connected between the power semiconductor module and the snubber capacitor employing the wiring pattern of the negative potential of the DC bus.

Abstract: To improve accessibility with respect to a power conversion unit in a power converter. The power converter includes a circuit connection part including a positive electrode conductor, a negative electrode conductor and an AC conductor, a power semiconductor module positioned in a particular direction with respect to the circuit connection part and connected to the positive electrode conductor, the negative electrode conductor and the AC conductor and a capacitor positioned in the particular direction with respect to the circuit connection part and connected to the positive electrode conductor and the negative electrode conductor. The positive electrode conductor is connected to a positive electrode conductor of another power conversion unit through a unit connection part positioned in an opposite direction of the particular direction with respect to the circuit connection part.

Abstract: An imbalance of control signals between two power semiconductor elements is reduced. A first power semiconductor module and a second power semiconductor module are arranged in a predetermined direction along a surface of a control signal wiring circuit board, each of longitudinal directions of the first power semiconductor module and the second power semiconductor module along the surface of the control signal wiring circuit board is a predetermined direction, and, in a first control signal wiring, a distance between an external control signal terminal and a second control signal terminal is equal to a distance between the external control signal terminal and a first control signal terminal.

Abstract: An uninterruptible power-supply system is a power converter having a PN laminated bus bar and a plurality of power conversion units and supplying power from a commercial power supply via a converter and an inverter. The power conversion units each have positive side terminals connected to each other and negative side terminals connected to each other through the PN laminated bus bar. At least one power conversion unit constitutes a phase of the converter. At least another one power conversion unit constitutes a phase of the inverter and has the positive side terminal lying adjacent to and connected through the PN laminated bus bar to the positive side terminal of the corresponding power conversion unit constituting the phase of the converter and the negative side terminal lying adjacent to and connected to the negative side terminal of the corresponding power conversion unit constituting the phase of the converter.

Abstract: To improve accessibility with respect to a power conversion unit in a power converter. The power converter includes a circuit connection part including a positive electrode conductor, a negative electrode conductor and an AC conductor, a power semiconductor module positioned in a particular direction with respect to the circuit connection part and connected to the positive electrode conductor, the negative electrode conductor and the AC conductor and a capacitor positioned in the particular direction with respect to the circuit connection part and connected to the positive electrode conductor and the negative electrode conductor. The positive electrode conductor is connected to a positive electrode conductor of another power conversion unit through a unit connection part positioned in an opposite direction of the particular direction with respect to the circuit connection part.

Abstract: A module of conversion circuit includes a High side IGBT, a Low side IGBT connected in series to the High side IGBT, a first terminal connected to the High side IGBT, a second terminal connected to the Low side IGBT, a capacitor connected to the first terminal and the second terminal, and a third terminal connected to a connection point between the High side IGBT and the Low side IGBT. A fourth terminal is engaged with the first terminal. A fifth terminal is engaged with the second terminal. A sixth terminal is engaged with the third terminal. The first and second terminals have at portions thereof between front edges and rear edges high-resistance parts having higher resistance than other portions.

Abstract: To improve accessibility with respect to a power conversion unit in a power converter. The power converter includes a circuit connection part including a positive electrode conductor, a negative electrode conductor and an AC conductor, a power semiconductor module positioned in a particular direction with respect to the circuit connection part and connected to the positive electrode conductor, the negative electrode conductor and the AC conductor and a capacitor positioned in the particular direction with respect to the circuit connection part and connected to the positive electrode conductor and the negative electrode conductor. The positive electrode conductor is connected to a positive electrode conductor of another power conversion unit through a unit connection part positioned in an opposite direction of the particular direction with respect to the circuit connection part.

Abstract: The present invention reduces the footprint of a power conversion device. A first power semiconductor module and a second power semiconductor module are connected to a positive conductor, a negative conductor, and an alternating-current conductor. An external alternating-current terminal, the first power semiconductor module, the second power semiconductor module, a capacitor, and an external direct-current terminal including an external positive terminal and an external negative terminal are arrayed on a straight line extending in the longitudinal direction of a circuit connection section. The external alternating-current terminal is disposed at one longitudinal end of the circuit connection section. The external direct-current terminal is disposed at the other longitudinal end of the circuit connection section.

Abstract: An electrical power conversion unit is provided with: a circuit connecting part which includes a positive electrode conductor, a negative electrode conductor, and an alternating current conductor; a power semiconductor module connected to a specific side of the circuit connecting part; a fin that extends to the opposite side of the circuit connecting part with respect to the power semiconductor module; and a capacitor disposed at one end in the lengthwise direction of the circuit connecting part. A space in which a cooling fan is disposed is formed by an extending part and the fin, when the extending part is defined as a region, of the circuit connecting part, other than the portion at which the fin projects to the circuit connecting part, such region including one end that is opposite, via the fin, the one end where the capacitor is present.

Abstract: A cooling structure of a heating element includes: the heating element having at least one cooling surface from which a plurality of pin fins project; a heat receiving plate which has a shape complying with the cooling surface and in which holes are formed at positions facing each pin fin, each pin fin being movably inserted into the holes; a cooler which has a pair of clamping members that sandwich therebetween the heating element and the heat receiving plate while pressing the heating element and the heat receiving plate, and which cools the heat receiving plate; and a space securing part which is provided on the heat receiving plate and suppresses a distance between the pair of clamping members so as not to apply a pressing force by the clamping members to the heating element.

Abstract: The present invention reduces the footprint of a power conversion device. A first power semiconductor module and a second power semiconductor module are connected to a positive conductor, a negative conductor, and an alternating-current conductor. An external alternating-current terminal, the first power semiconductor module, the second power semiconductor module, a capacitor, and an external direct-current terminal including an external positive terminal and an external negative terminal are arrayed on a straight line extending in the longitudinal direction of a circuit connection section. The external alternating-current terminal is disposed at one longitudinal end of the circuit connection section. The external direct-current terminal is disposed at the other longitudinal end of the circuit connection section.

Abstract: An uninterruptible power-supply system is a power converter having a PN laminated bus bar and a plurality of power conversion units and supplying power from a commercial power supply via a converter and an inverter. The power conversion units each have positive side terminals connected to each other and negative side terminals connected to each other through the PN laminated bus bar. At least one power conversion unit constitutes a phase of the converter. At least another one power conversion unit constitutes a phase of the inverter and has the positive side terminal lying adjacent to and connected through the PN laminated bus bar to the positive side terminal of the corresponding power conversion unit constituting the phase of the converter and the negative side terminal lying adjacent to and connected to the negative side terminal of the corresponding power conversion unit constituting the phase of the converter.

Abstract: A power conversion device capable of reducing a temperature variation between a plurality of semiconductor modules is provided. The power conversion device comprises condensers 121, 122, a plurality of semiconductor modules 101, 102, heat dissipation units 103 to 109, a bus bar 140 connecting the condensers 121, 122 with the plurality of the semiconductor modules 101, 102, and a ventilation unit having cool wind blow. The power conversion module has features that the plurality of semiconductor modules 101, 102 are arranged apart from the condensers 121, 122 and in a line in a longitudinal direction of the bus bar 140 and that the cool wind 150 blows in a direction from the condensers 121, 122 toward the plurality of semiconductor modules 101, 102 that are mounted.

Abstract: An imbalance of control signals between two power semiconductor elements is reduced. A first power semiconductor module and a second power semiconductor module are arranged in a predetermined direction along a surface of a control signal wiring circuit board, each of longitudinal directions of the first power semiconductor module and the second power semiconductor module along the surface of the control signal wiring circuit board is a predetermined direction, and, in a first control signal wiring, a distance between an external control signal terminal and a second control signal terminal is equal to a distance between the external control signal terminal and a first control signal terminal.

Abstract: A cooling structure of a heating element includes: the heating element having at least one cooling surface from which a plurality of pin fins project; a heat receiving plate which has a shape complying with the cooling surface and in which holes are formed at positions facing each pin fin, each pin fin being movably inserted into the holes; a cooler which has a pair of clamping members that sandwich therebetween the heating element and the heat receiving plate while pressing the heating element and the heat receiving plate, and which cools the heat receiving plate; and a space securing part which is provided on the heat receiving plate and suppresses a distance between the pair of clamping members so as not to apply a pressing force by the clamping members to the heating element.