Abstract: A fracture due to crack growth occurring in a solder bonding portion of a wiring board of a control board in a quantum computer operating in a low-temperature environment can be prevented. There is provided a control board in which a chip electronic component having a plurality of electrodes formed thereon is connected to, by solder bonding portions, a wiring board having a wiring pattern and soldering pads formed on a front surface thereof. On the electrodes, after soldering, corner portions of the electrodes on the wiring board and entire lower surfaces thereof are covered with solder bonding portions, and corner portions of the pads on a side close to the electronic component and entire upper surfaces thereof are covered with the solder bonding portions.

Abstract: A wind farm including wind power generation apparatuses the damage degrees of which can be held down and wind power generation apparatuses can be provided without introducing a central processing unit for the wind farm and new wind power generation apparatuses having the rotation directions of their blades different from each other.

Abstract: A rotary machine includes two sets of three-phase stator winding wires and two sets of inverters connected to the same direct-current power supply. Alternating-current terminals of the inverters are respectively connected to the three-phase stator winding wires. Stator winding wires are housed in a plurality of slots to form a stator. The two sets of three-phase stator winding wires and the stator winding wires in the same phase of the sets are started to be wound from the slot positions, with phases thereof being different from each other by 180 degrees, among the plurality of slots and are finished being wound in the slot positions, with phases thereof different from each other by 180 degrees. Winding end points of the three-phase stator winding wires are respectively connected in common, and alternating-current voltages having the same magnitude and opposite phases are applied to the two sets of three-phase stator winding wire.

Abstract: An electrical rotating machine system that can be easily maintained and can provide improved power generation efficiency. The electrical rotating machine system includes: a first electrical rotating machine having a first stator that has first stator windings, and a first rotor that has first rotor windings and is disposed on the internal diameter side of the first stator so as to have a gap between the internal diameter side of the first stator and the first rotor itself; a second electrical rotating machine having a second stator that has second stator windings, and a second rotor that has second rotor windings and is disposed on the internal diameter side of the second stator so as to have a gap between the internal diameter side of the second stator and the second rotor itself; and at least one power converter that is electrically connected to the first rotor windings and the second rotor windings, and configured to rotate when the first rotor rotates.

Abstract: A power converter includes semiconductor switching elements conducting when the semiconductor switching elements fail; and open/close units that are disposed between parts having a plurality of different voltage levels and connection portions where the semiconductor switching units, which are to be connected to the parts having the different voltage levels, are connected to each other, and that open or close paths between the parts having the different voltage levels and the connection. When an excess current flows through any one of the open/close units, the one of the open/close unit opens the current path between the part having the corresponding voltage level and the connection portion. Then the power converter does not output the voltage to which the open/close unit is connected, and thereby the number of output voltage levels is reduced.

Abstract: For reducing a storage capacity of a storage battery system and an installation cost at a constant-output control type of wind power plant, a wind power generation control device sets as a planned generation power value PT: an average wind generated power value PA, when a current battery charging rate SOC of the storage battery system is within the range of the upper and lower limit values of the targeted battery charging rate range SOCT (S12); a value obtained by multiplying a positive constant greater than 1 to the said PA, when the current battery charging rate SOC is above the upper limit value of the said SOCT (S14): and a value obtained by multiplying a positive constant less than 1 to the said PA, when the current battery charging rate SOC is below the lower limit value of the said SOCT (S15).

Abstract: A method for efficiently carrying out an analysis and computation using mesh structures is disclosed. When an insulator is brought into contact with two conductors, the mesh structures are generated and a displacement current is analyzed. In the generated structures, the insulator is considered a three-dimensional mesh structure and at least a portion of the conductor brought into contact with the insulator is considered a three-dimensional structure whereas the other portions are taken as a one- or two-dimensional structures. In an alternative, the insulator is considered a three-dimensional structure and at least a portion of the conductor brought into contact with the insulator is considered a three-dimensional structure whereas the other portions are considered three- to one-dimensional structures. In the conductor, a short-circuit section with no mesh elements is provided between at least a portion brought into contact with the insulator and the other portions.

Abstract: A electrical machine and a wind power generating system include a stator having a stator winding, a rotor arranged on a side of an inner diameter of the stator with a clearance between the rotor and the stator, a shaft fixed to the rotor and rotated along with the rotor, and a heat pipe arranged from an inner portion over to an outer portion of the shaft, and a radius of gyration of a portion of the heat pipe arranged at the outer portion of the shaft is smaller than that of a portion arranged at the inner portion of the shaft.

Abstract: A rotary machine includes two sets of three-phase stator winding wires and two sets of inverters connected to the same direct-current power supply. Alternating-current terminals of the inverters are respectively connected to the three-phase stator winding wires. Stator winding wires are housed in a plurality of slots to form a stator. The two sets of three-phase stator winding wires and the stator winding wires in the same phase of the sets are started to be wound from the slot positions, with phases thereof being different from each other by 180 degrees, among the plurality of slots and are finished being wound in the slot positions, with phases thereof different from each other by 180 degrees. Winding end points of the three-phase stator winding wires are respectively connected in common, and alternating-current voltages having the same magnitude and opposite phases are applied to the two sets of three-phase stator winding wire.

Abstract: For reducing a storage capacity of a storage battery system and an installation cost at a constant-output control type of wind power plant, a wind power generation control device sets as a planned generation power value PT: an average wind generated power value PA, when a current battery charging rate SOC of the storage battery system is within the range of the upper and lower limit values of the targeted battery charging rate range SOCT (S12); a value obtained by multiplying a positive constant greater than 1 to the said PA, when the current battery charging rate SOC is above the upper limit value of the said SOCT (S14): and a value obtained by multiplying a positive constant less than 1 to the said PA, when the current battery charging rate SOC is below the lower limit value of the said SOCT (S15).