Abstract: An electric motor includes processing circuitry estimates a position of a rotor in a mode selected from an induced voltage mode and a harmonic superimposition mode. The processing circuitry estimates the position of the rotor using the induced voltage mode when the input voltage is less than or equal to a predetermined voltage threshold value or when the phase current is greater than or equal to a predetermined current threshold value and estimates the position of the rotor using the harmonic superimposition mode when the input voltage is greater than the voltage threshold value and the phase current is less than the current threshold value.

Abstract: An industrial vehicle includes an industrial vehicle including an object detector, a switching member configured to perform switching between a first travel mode in which the industrial vehicle travels in a direction toward a detection range of the object detector and a second travel mode in which the industrial vehicle does not travel in the direction toward the detection range of the object detector, and a controller configured to perform an object avoidance control according to a detection result of the object detector. The controller performs the object avoidance control according to the detection result of the object detector when the first travel mode is set. The controller performs a control so as to maintain the object avoidance control when the first travel mode is switched to the second travel mode while the industrial vehicle is travelling in the first travel mode.

Abstract: The exhaust gas purification device includes a substrate, a first catalyst layer, and a second catalyst layer. The substrate includes an upstream end and a downstream end. The first catalyst layer contains first catalyst particles and lies on the substrate across a first region extending between the upstream end and a first position. The first position is at a first distance from the upstream end toward the downstream end. The second catalyst layer contains second catalyst particles and lies on the first catalyst layer across the first region. The second catalyst layer is provided with pores. Pore connectivity of the second catalyst layer is 5% to 35%. A mean value of areas of the pores of the second catalyst layer in a cross-sectional backscattered electron image of the second catalyst layer may be 0.7 ?m2 to 9.0 ?m2.

Abstract: A collar of a fixed scroll includes a gasket contact surface with which a gasket comes into contact, and a metal contact surface that causes the collar and a compression housing to be in contact and receives the axial force of bolts. The collar has a protruding portion that protrudes in the axial direction relative to the gasket contact surface, and the metal contact surface is disposed on the protruding portion.

Abstract: A roots pump includes a housing, a rotor chamber, a pair of rotary shafts, and a pair of rotors. The rotor chamber includes a rotor chamber peripheral surface facing a pair of distal end portions of each of the rotors. Each of the pair of the distal end portions includes: a pair of rotor peripheral surfaces facing the rotor chamber peripheral surface with a first radial clearance; and a distal end peripheral surface that is formed between the pair of the rotor peripheral surfaces in the rotational direction and faces the rotor chamber peripheral surface with a second radial clearance greater than the first radial clearance. A width of the rotor chamber peripheral surface facing the distal end peripheral surface in the rotational direction is greater than a sum of a pair of predetermined widths of the rotor chamber peripheral surface facing the pair of the rotor peripheral surfaces.

Abstract: A fiber structure body includes a several fiber layers stacked in a stacking direction and has a multi-axial orientation that includes axial-force directional yarns, orthogonal directional yarns, and intersecting yarns. The fiber structure body includes a flat plate portion and a bend portion that is bent to the flat plate portion and includes a surface intersecting with a surface of the flat plate portion. The axial-force directional yarns are made of continuous fiber of reinforced fiber. Of yarns that form the bend portion and are other than the axial-force directional yarns, yarns that form at least one axis of the bend portion are provided by spun yarns made of discontinuous fiber.

Abstract: A power supply includes: a wiring to which direct current (DC) electric power is supplied from an external power supply; a first DC/DC converter that converts a voltage value of the DC electric power supplied to the wiring into another voltage value to output the DC electric power to a load group; a first filter unit having a first cutoff frequency; a second DC/DC converter that converts the voltage value of the DC electric power supplied to the wiring into another voltage value to output the DC electric power to the load group; a second filter unit having a second cutoff frequency higher than the first cutoff frequency; and a controller that controls the first DC/DC converter when DC electric power is supplied from the external power supply to the wiring and when DC electric power needs to be supplied to the load group.

Abstract: A motor-driven compressor includes an inverter device. The inverter device includes a common mode choke coil. The common mode choke coil includes an annular core, two windings wound around the core, and an annular conductor that covers the two windings. The conductor is divided into a first metal plate and a second metal plate, which are combined to form an annular shape such that induced current flows in a circumferential direction of the conductor so as to hinder changes in leakage magnetic flux from the core. The second metal plate is thermally connected to the housing. The first metal plate is thermally connected to the second metal plate. At least one of an electrical resistance value or a thermal resistance value in a current path of the induced current is lower in the second metal plate than in the first metal plate.

Abstract: A fluid machine includes a plurality of fluid dynamic plain bearings supporting a rotating member. The fluid dynamic plain bearings each include: a top foil; a bump foil; and a bearing housing. The top foil has a bearing surface that has one end portion and the other end portion in a circumferential direction of the bearing surface. The top foil has a fixed end and a free end respectively formed at the one end portion and the other end portion. A movement of the free end in an axial direction of the rotating member is regulated by a regulating member. A clearance through which a fluid flows is formed between the fixed end and the free end. The free end has a discharge passage through which a foreign substance contained in the fluid is discharged from the clearance. The discharge passage is formed through the free end.

Abstract: [Technical Problem] An object is to provide a lubricant capable of forming a stable adsorption film on a sliding surface and stabilizing the sliding characteristics (for example, ensuring the wear resistance, etc.). [Solution to Problem] The present invention provides a lubricant represented by the following chemical structural formula. (R: a hydrocarbon group whose carbon number is 8 to 24, m and n: integers of 2 to 8) [Selected Figure] FIG.

Abstract: A fluid machine includes an electric motor, a pump, an inverter, and a housing having a motor chamber and an inverter chamber. The housing has a cooling passage having an inverter cooling passage and a motor cooling passage through which cooling fluid flows. After the cooling fluid is introduced to the inverter cooling passage, a flow of the cooling fluid is divided at the inlet into a flow of the cooling fluid flowing through the inverter cooling passage and a flow of the cooling fluid flowing through the motor cooling passage, the flow of the cooling fluid flowing through the inverter cooling passage and the flow of the cooling fluid flowing through the motor cooling passage are joined together at the outlet and discharged from the inverter cooling passage. The inverter cooling passage has a passage expanded portion in which a vortex flow is generated.

Abstract: A spot welding method includes a heating step of energizing an electrode in pressure contact with an Al alloy member to heat and melt a join part by resistance heating and a cooling step of cooling the join part after the heating step in a state in which the electrode is in pressure contact with the Al alloy member. The alloy is a wrought alloy of Mg: 0.2 to 1.2 mass %, Si: 0.4 to 1.5%, and Cu: 1.1% or less or a casting alloy of Si: 7 to 11% and Mg: 0.1 to 0.4% with respect to 100% as a whole. The cooling step includes a first cooling process performed with a reduced amount of input energy to the join part as compared with the heating step and a second cooling process performed after the first cooling process at a higher cooling rate than that in the first cooling process.

Abstract: A scroll compressor includes a housing and a compression mechanism. The compression mechanism includes a compression chamber. The housing includes an intermediate pressure chamber into which refrigerant having an intermediate pressure is introduced from an external refrigerant circuit. The intermediate pressure is higher than a suction pressure of refrigerant drawn into the compression chamber and lower than a discharge pressure of the refrigerant discharged from the compression chamber. The intermediate pressure chamber and the compression chamber in a process of compression are connected to each other by an injection passage. The injection passage includes a muffler.

Abstract: A scroll compressor includes a compression chamber that compresses a fluid, an outer peripheral passage into which the fluid flows from a motor chamber, and a suction passage draws in the fluid from the outer peripheral passage to the compression chamber. The compression chamber is defined by a fixed scroll and an orbiting scroll. The outer peripheral passage is defined by a third peripheral wall of a discharge housing member and a fixed peripheral wall of the fixed scroll. The suction passage is provided in the fixed peripheral wall and includes an upstream-side outer peripheral surface located between the suction passage and an electric motor in an axial direction of a rotary shaft. A distance from an axis of the rotary shaft to the upstream-side outer peripheral surface varies in the axial direction of the rotary shaft.

Abstract: A scroll compressor includes a housing, a rotary shaft rotatably supported by the housing, a fixed scroll accommodated in the housing and fixed to the housing, an orbiting scroll that orbits as the rotary shaft rotates, a compression chamber defined between the fixed scroll and the orbiting scroll, a discharge chamber, and an oil passage. A refrigerant taken in from the outside is compressed in the compression chamber. The refrigerant compressed in the compression chamber is discharged into the discharge chamber. An outer peripheral space connected to the compression chamber is defined between the outer peripheral surface of the fixed scroll and the inner peripheral surface of the housing. Oil separated from the refrigerant discharged into the discharge chamber is guided to the outer peripheral space through the oil passage.

Abstract: A controller for a fuel cell system controls generated power of a fuel cell stack by switching a generation state of the fuel cell stack based on a state of charge of a power storage device. The generation state includes a first generation state, in which the fuel cell stack is caused to generate a first generated power, a second generation state, in which the fuel cell stack is caused to generate a second generated power greater than the first generated power, and a third generation state, in which the fuel cell stack is caused to generate a third generated power greater than the second generated power. The controller calculates a power reference value indicating an actual result of power generation of the fuel cell stack from the detected generated power of the fuel cell stack, and updates the second generated power based on the power reference value.

Abstract: An attachment structure of a flat wire harness includes: an attachment target member; a flat wire harness; and an attachment part. In the flat wire harness, a through hole is formed in a part of a base material where a plurality of electrical wires are not disposed. The attachment part includes a rod-like part passing through the through hole, a fixing part provided to a first end portion of the rod-like part to fix the rod-like part to the attachment target member, and a retaining part provided to a second end portion of the rod-like part to prevent the rod-like part from coming out of the through hole. An outer size of the retaining part is larger than a dimension of the through hole, and the dimension of the through hole is equal to or larger than a thickness of the rod-like part.

Abstract: A foil bearing includes a bearing housing, a top foil, a bump foil, and two retaining portions. A holding groove is formed in the inner circumferential surface of the bearing housing to extend in an axial direction. The top foil and the bump foil each include an insertion plate portion, which is inserted into the holding groove and extends in the axial direction. Each of the retaining portions includes a facing surface that faces the insertion plate portion in the axial direction. In the axial direction, the distance between the facing surfaces of the two retaining portions is longer than the length of the insertion plate portion. At least one of the insertion plate portions includes a bent plate portion that is bent to contact the facing surface.

Abstract: A collar of a fixed scroll includes a gasket contact surface with which a gasket comes into contact, and a metal contact surface that causes the collar and a compression housing to be in contact and receives the axial force of bolts. The collar has a protruding portion that protrudes in the axial direction relative to the gasket contact surface, and the metal contact surface is disposed on the protruding portion.

Abstract: An industrial vehicle remote operation system includes an industrial vehicle including a vehicle communication part that performs wireless communication; a remote operation device including a remote communication part that performs wireless communication with the vehicle communication part, wherein the remote operation device is used to remotely operate the industrial vehicle; and a remote-operation stop control part that, based on a fact that a remote-operation stop operation has been performed on the remote operation device in a situation where operation of the industrial vehicle is being performed through a remote operation by the remote operation device, performs an operation stop control for stopping the operation of the industrial vehicle, and stops the remote operation by the remote operation device after the operation stop control is completed.