Abstract: A driving apparatus has a problem in that a tip end of an output shaft, which is inserted through a hollow space, is difficult to be fitted into the apparatus body during the maintenance. Therefore, a driving apparatus includes an input shaft with a hollow space formed therein that penetrates therethrough in the axial direction, a motor that rotates the input shaft, a reduction gear that receives the power of the motor from the input shaft, an output shaft inserted through the hollow space of the input shaft and adapted to rotate about the rotation axis with power output from the reduction gear, and a coupling connected to a tip end of the output shaft. A first bearing for supporting the output shaft is arranged, and a second bearing for supporting the output shaft is arranged in the hollow space between the input shaft and the output shaft.

Abstract: A non-contact power supply device 1 supplying power in a non-contacting manner to a battery 51 provided in an electric vehicle 5, includes a guide 20 that defines a stopping position of the electric vehicle 5 when the electric vehicle 5 is supplied with power in the non-contacting manner; and a power transmitter 10 that includes a power transmission coil Lt and a housing 110 accommodating the power transmission coil Lt and that transmits power to the electric vehicle 5 stopped at the stopping position from the power transmission coil Lt, wherein the guide 20 includes two guide parts 21, 21 disposed apart from each other in a width direction of the electric vehicle 5 with a space greater than a width of the electric vehicle 5, and a vehicle stopper 22 that is disposed at a far side in a moving direction of the electric vehicle 5.

Abstract: Provided are a power reception device and a power reception control method capable of suppressing the application of an excessive voltage even in the case where a time lag occurs before power transmission by a power transmission device is stopped after disconnection between the power reception device and a load. A power reception device includes: a power reception coil that receives power transmitted from a power transmission coil; a rectification circuit that rectifies alternating current power received by the power reception coil; and a control circuit that is connected between the rectification circuit and a load to which direct current power outputted from the rectification circuit is supplied, and controls that the direct current flowing through the load to be constant or equal to or less than a predetermined value by the direct current power.

Abstract: A transfer robot includes a support unit, a rotary base supported by the support unit, a rotation mechanism that rotates the rotary base, a hand unit supported by the rotary base and configured to support a work, and a linear movement mechanism that moves the hand unit in a horizontal direction relative to the rotary base. The rotation mechanism includes a first rotation mechanism that rotates the rotary base relative to the support unit about a first rotation axis extending in a vertical direction, and a second rotation mechanism that rotates the rotary base about a second rotation axis inclined by a predetermined angle with respect to the first rotation axis. The support unit includes a pivotal member that pivots about a pivotal axis perpendicular to the first rotation axis.

Abstract: A power system is provided for controlling a connection point power at a connection point with a power grid D. The power system includes a processing device that calculates a guidance command value for controlling the connection point power to achieve a target power, and a plurality of power control devices that each control the output power of mutually different types of control targets, based on a common guidance command value inputted from the processing device. Each of the plurality of power control devices calculates a target value of the output power, based on an optimization problem including a common evaluation function. The evaluation function includes the guidance command value and a design parameter for which a setting value set for each of the plurality of power control devices is substituted.

Abstract: Provide are a power reception device, a wearable device, and a non-contact power feeding system that can improve the transmission efficiency while suppressing upsizing of the circuit thereof. A power reception device (3) includes a variable capacitance circuit (100) and a power reception coil (41) constituting a resonance circuit together with the variable capacitance circuit (100), in which the variable capacitance circuit (100) includes a first capacitor (C1) and a second capacitor (C2) connected in parallel to each other, a first switch (Tr1) connected in series to one end side of the first capacitor (C1), and a switch control circuit (110) that controls turning on and off of the first switch (Tr1) and includes a first comparator (OP1) that supplies a first control voltage to the first switch (Tr1) according to a comparison result between a reference voltage and an AC voltage applied to the second capacitor (C2).

Abstract: An impedance matching device includes: a variable capacitor in which a plurality of first capacitance elements or a plurality of second capacitance elements are connected in parallel; a calculation unit that calculates an impedance or a reflection coefficient on the load side using information regarding the impedance acquired from the outside; and a control unit that determines an ON/OFF state to be taken by each of semiconductor switches included in the variable capacitor using the impedance or the reflection coefficient calculated by the calculation unit and turns on or off the semiconductor switches included in the first or second capacitance element based on the determined state. The control unit cyclically switches semiconductor switches to be turned on or off in a predetermined order.

Abstract: A driving apparatus has a problem in that during the maintenance operation, foreign matter moves from the tip end side of an input shaft into a hollow space. Therefore, a driving apparatus includes an input shaft with a hollow space formed therein, the hollow space penetrating therethrough in the axial direction, a motor that rotates the input shaft, a reduction gear that receives the power of the motor 1 from the input shaft, an output shaft inserted through the hollow space of the input shaft and adapted to rotate about the rotation axis with power output from the reduction gear, and a detector that detects information on the rotation of the input shaft and the output shaft. A limiting member, which limits the movement of foreign matter into the hollow space of the input shaft from one side to the other side of the motor, is arranged in the hollow space between the input shaft and the output shaft.

Abstract: A method is provided for controlling arc welding including forward and reverse feeding periods alternately switched. By the method, a set of a short circuit period and an arc period is repeated, and the arc welding is controlled such that the reverse feeding period shifts to the forward feeding period when an arc occurs during the reverse feeding period, and that the forward feeding period shifts to the reverse feeding period when a short circuit occurs between the welding wire and the object during the forward feeding period. The reverse feeding period includes a reverse feeding deceleration period having a time length that is adjusted in accordance with the time length of the short circuit period.

Abstract: A metal powder contains not less than 0.10 mass % and not more than 1.00 mass % of at least one of chromium and silicon, and a balance of copper. The total content of the chromium and the silicon is not more than 1.00 mass %. In accordance with an additive manufacturing method for this metal powder, an additively-manufactured article made from a copper alloy is provided. The additively-manufactured article has both an adequate mechanical strength and an adequate electrical conductivity.

Abstract: A power supply system includes multiple power supply devices including a first power supply device and a second power supply device that are connected in common to a load. The first power supply device calculates control information for controlling voltage or current to be output to the load and controls the output to the load based on the calculated control information while transmitting the control information to the second power supply device. The second power supply device receives the control information and controls the output to the load based on the received control information while detecting current to be output from its own device to the load and transmitting current information to the first power supply device. The first power supply device receives the current information transmitted from the second power supply device and calculates control information based on the received current information and the current and voltage detected by its own device.

Abstract: An impedance matching device comprises a variable capacitor including multiple capacitance elements and connected in parallel having capacitors and each having one end connected in series to a high-frequency power source and semiconductor switches and connected to the respective capacitors, and a control unit. The control unit derives a reflection coefficient based on the obtained information concerning an impedance viewed from the high-frequency power source toward the load side, updates the states of the respective semiconductor switches and included in the multiple capacitance elements and with a first cycle in the case where the reflection coefficient is equal to or more than a predetermined value, and updates the states of the respective semiconductor switches and included in the plurality of capacitance elements and with a second cycle longer than the first cycle in the case where the reflection coefficient is less than the predetermined value.

Abstract: A copper alloy powder is a copper alloy powder for additive manufacturing. The copper alloy powder contains more than 1.00 mass % and not more than 2.80 mass % of chromium, and a balance of copper. A method for producing an additively-manufactured article includes a first step of preparing a copper alloy powder containing more than 1.00 mass % and not more than 2.80 mass % of chromium and a balance of copper and a second step of producing the additively-manufactured article from the copper alloy powder, and the additively-manufactured article is produced such that forming a powder layer including the copper alloy powder, and solidifying the copper alloy powder at a predetermined position in the powder layer to form a shaped layer are sequentially repeated to stack such shaped layers to thus produce the additively-manufactured article.

Abstract: There is provided an arc welding control method of performing a forward/reverse feeding control of alternating a feeding rate of a welding wire between a forward feeding period and a reverse feeding period, and generating short-circuiting periods and arc periods to perform welding. The welding wire is fed forwardly at a time of staring the welding. The forward/reverse feeding control is started from the reverse feeding period of the welding wire after starting conduction of a welding current.

Abstract: A measurement device that performs a predetermined measurement task together with a plurality of other measurement devices is provided. This measurement device is provided with a sampling phase generator for generating a sampling phase for instructing a timing of sampling, and a communication unit for communicating with at least one of the plurality of other measurement devices. The communication unit transmits the sampling phase generated by the sampling phase generator to at least one of the plurality of other measurement devices. The sampling phase generator is configured to generate a third sampling phase, using an operation that is based on a generated first sampling phase and a second sampling phase received by the communication unit from at least one of the plurality of other measurement devices.

Abstract: A power transfer device comprises a power transfer coil; a case that has a surface extending along a direction perpendicular to an axial direction of the power transfer coil and stores the power transfer coil; a rotating shaft rotatable about the shaft that extends in the axial direction of the power transfer coil at a central portion in a radial direction of the power transfer coil and has an end penetrating the surface and protruding outward through the surface; a foreign object remover that projects outwardly from the end of the rotating shaft in a radial direction of the rotating shaft and moves on the surface; a driving source that provides the rotating shaft with power; and a processor that determines whether or not a vehicle is present. The driving source is driven if the processor determines that the vehicle is present.

Abstract: A copper alloy powder is a copper alloy powder for additive manufacturing. The copper alloy powder contains more than 1.00 mass % and not more than 2.80 mass % of chromium, and a balance of copper. A method for producing an additively-manufactured article includes a first step of preparing a copper alloy powder containing more than 1.00 mass % and not more than 2.80 mass % of chromium and a balance of copper and a second step of producing the additively-manufactured article from the copper alloy powder, and the additively-manufactured article is produced such that forming a powder layer including the copper alloy powder, and solidifying the copper alloy powder at a predetermined position in the powder layer to form a shaped layer are sequentially repeated to stack such shaped layers to thus produce the additively-manufactured article.

Abstract: An impedance matching device includes: a variable capacitor in which a plurality of series circuits of capacitors and semiconductor switches are connected in parallel; a calculation unit that calculates an impedance or a reflection coefficient on the load side using information regarding impedance acquired from the outside; and a control unit that determines ON/OFF states to be taken by the semiconductor switches included in the variable capacitor using the impedance or the reflection coefficient calculated by the calculation unit and turns on or off the semiconductor switches based on the determined states. The control unit changes an ON/OFF control timing between one and another of the semiconductor switches.

Abstract: A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.

Abstract: A vehicle system provided according to one aspect of the present disclosure includes a power transmitter and a vehicle. The power transmitter is placed at one of at least one charge position. The vehicle includes: a power receiver, a capacitor, and a motor. The power receiver wirelessly receives first electric power from the power transmitter, and outputs second electric power deriving from the first electric power. The capacitor stores the second electric power output by the power receiver such that the capacitor is charged from a first voltage Vc1 to a second voltage Vc2. The motor is driven by the second electric power from the capacitor. The vehicle automatically travels a distance Dx along a route from one to a next one of the at least one charge position on the route. The distance Dx satisfies a certain relationship.