Abstract: A manufacturing method includes a first repeating step of irradiating a base material with a pulse laser, having a spot diameter S, while relatively moving a laser head and the base material in a first direction, moving the laser head by a predetermined pitch width P in a second direction that intersects the first direction, and repeating irradiation by the pulse laser along the first direction and movement of the laser head in the second direction, and a second repeating step of irradiating the base material with the pulse laser while relatively moving the laser head and the base material in the second direction, moving the laser head by the pitch width in the first direction, and repeating irradiation by the pulse laser along the second direction and movement of the laser head in the first direction, wherein S<P<100 ?m.

Abstract: A matrix convertor includes a power convertor and a controller. The power convertor is disposed between a power system and a rotating electric machine, and includes a plurality of bidirectional switches. The controller is configured to control an exciting current flowing from the power convertor to the rotating electric machine so as to control a power factor on a side of the power system.

Abstract: A power generating device is provided, which includes a matrix converter device, a power transmission path for transmitting electric power between the matrix converter device and an electric power system, and at least one inductor for phase adjustment, bridged between the power transmission path and a neutral point.

Abstract: A series multiplex matrix converter includes a power converter and a controller. The power converter is disposed between a power system and a rotating electric machine, and includes a plurality of power conversion cells connected in series to each other. The controller is configured to control at least one power conversion cell among the plurality of power conversion cells to cause a current to flow from the at least one power conversion cell toward the rotating electric machine, and configured to control a rest of the plurality of power conversion cells to cause the current flowing toward the rotating electric machine to flow from the rest of the plurality of power conversion cells toward the power system as a reactive current.

Abstract: A matrix convertor includes a power convertor and a controller. The power convertor is disposed between a power system and a rotating electric machine, and includes a plurality of bidirectional switches. The controller is configured to control an exciting current flowing from the power convertor to the rotating electric machine so as to control a power factor on a side of the power system.

Abstract: A power generating device is provided, which includes a matrix converter device, a power transmission path for transmitting electric power between the matrix converter device and an electric power system, and at least one inductor for phase adjustment, bridged between the power transmission path and a neutral point.

Abstract: A matrix converter according to embodiments includes a power conversion unit and drive controllers. The power conversion unit includes a plurality of bidirectional switches for connecting each phase of an alternating-current (AC) power supply with each phase of a rotary electric machine. When the voltage of the AC power supply is a predetermined value or less, the drive controllers control the power conversion unit to supply reactive power from the power conversion unit to the AC power supply and to control the torque of the rotary electric machine.

Abstract: A matrix converter according to an embodiment includes a plurality of bidirectional switches and a controller. The bidirectional switches connect each of phases of an alternating current (AC) power supply with each of phases of a rotary electric machine. The controller controls the bidirectional switches to perform power conversion control between the AC power supply and the rotary electric machine. The controller performs on/off control individually on a plurality of unidirectional switching elements constituting the bidirectional switches by using both 120-degree conduction control and PWM control.

Abstract: A matrix converter includes: a power conversion unit provided between an AC power supply and a rotational machine; and a controller for performing power conversion control therebetween by controlling the power conversion unit. The power conversion unit includes multiple bidirectional switches each of which has at least one first directional switching element and at least one second directional switching element. Further, the controller includes a first drive control unit performing the power conversion by simultaneously turning on both of the first directional switching element and the second directional switching element, and a second drive control unit performing the power conversion by turning on one of the first directional switching element and the second directional switching element.