Abstract: A new silicon material is provided. A negative electrode active material including an Al- and O-containing silicon material, the Al- and O-containing silicon material being configured such that a mass % of Al (WAl %) satisfies 0<WAl<1, and a peak indicating Al—O bond is observed in a range of 1565 to 1570 eV in an X-ray absorption fine structure measurement for a K shell of Al.

Abstract: An electric compressor includes a housing; a rotary shaft; an impeller connected to at least a first end portion of the rotary shaft in an axial direction of the rotary shaft, of the first end portion and a second end portion of the rotary shaft in the axial direction; and a pair of air bearings supporting the rotary shaft such that the rotary shaft is rotatable relative to the housing. A load on the first end portion is larger than a load on the second end portion. The pair of air bearings includes a first air bearing, and a second air bearing supporting the rotary shaft at a position closer to the second end portion of the rotary shaft than the first air bearing is. A load carrying capacity of the first air bearing is larger than a load carrying capacity of the second bearing.

Abstract: An electric motor includes a stator and a rotor rotatable relative to the stator. The stator includes: a stator core including a yoke portion having a cylindrical shape and twelve teeth each protruding radially inward from the yoke portion; and coils of three phases, a winding being concentratedly wound around each of the teeth to form each of the coils. The number of poles of the rotor is two. The teeth include two teeth located adjacent to each other in a circumferential direction and forming a teeth portion, and windings of a same phase are respectively wound in a same direction around the two teeth forming the teeth portion and are connected in series. The teeth are arranged such that the teeth portions adjacent to each other are different in phase and the three phases are arranged sequentially side by side in the circumferential direction.

Abstract: An autonomous vehicle includes first and second road surface image obtaining devices that are located on a bottom surface of the vehicle body and obtain images of a road surface below the vehicle body, respectively. The autonomous vehicle also includes a memory unit that stores a map image of the road surface, the map image being associated with geographical location information. The autonomous vehicle further includes first and second self-location estimating units that each compare a feature extracted from the image of the road surface obtained by corresponding one of the first and second road surface image obtaining devices with a feature extracted from the map image, thereby estimating a self-location of the autonomous vehicle.

Abstract: A voltage detection unit includes a voltage detection terminal, a housing including a terminal accommodating concave and a cover to be attached to the housing and to cover the voltage detection terminal accommodated in the terminal accommodating concave. The cover includes an extension piece extending in a first direction. The housing includes an accommodating hole to accommodate the extension piece, and a guide portion including an inclined surface and a guide surface. The inclined surface has a first end in the first direction and a second end and is inclined with respect to the first direction such that the first end is provided closer to the accommodating hole than the second end in a second direction perpendicular to the first direction and being parallel to the housing. The guide surface is continuous with the inclined surface and an inner wall surface of the accommodating hole.

Abstract: Provided is a drive circuit 1 including: a switching unit 3 including a first transistor Tr1 that constitutes an upper arm, and a second transistor Tr2 that is connected to the first transistor Tr1 in series and constitutes a lower arm; and a drive power supply 5 in which a positive electrode is connected to a gate terminal of the first transistor Tr1 and a negative electrode is connected to a source terminal of the second transistor Tr2.

Abstract: A steering device includes a rotation central portion having a rotation axis Ax of the steering device and a steering unit connected to the rotation central portion. The direction in which the rotation axis of the rotation central portion extends is an axial direction. One of directions perpendicular to the axial direction is a radial direction. A direction perpendicular to the axial direction and the radial direction is a width direction. The steering unit protrudes from the rotation central portion in the radial direction in plan view of the steering device in the axial direction. A maximum width of the steering unit in the width direction is less than or equal to a maximum width of the rotation central portion in the width direction.

Abstract: A motor-driven compressor includes a compression unit, an electric motor, a motor controller, a housing, and a connector. The motor controller includes a circuit board. The housing includes an inverter accommodation chamber, and the inverter accommodation chamber accommodates the motor controller. The connector is accommodated in the inverter accommodation chamber and electrically connects the circuit board and a member located outside the inverter accommodation chamber. The connector includes one or more busbars and a case. The one or more busbars are electrically connected to the circuit board. The case is formed from a resin and accommodates the one or more busbars. The circuit board and the connector are fastened to the housing. The one or more busbars are allowed to move in the case when the circuit board vibrates.

Abstract: A turbo fluid machine includes: a housing including an impeller chamber and a motor chamber accommodating an electric motor; an impeller that is accommodated in the impeller chamber and compresses fluid by the electric motor; a drive shaft extending in an axial direction of the drive shaft to connect the impeller and the electric motor; and a gasket sealing between the impeller chamber and an outside of the housing. The housing includes a first housing and a second housing that form the impeller chamber. The first housing and the second housing are arranged in the axial direction. The gasket is disposed between the first housing and the second housing in the axial direction. The first housing and the second housing are in contact with each other in the axial direction on at least one of an outer circumferential side and an inner circumferential side of the gasket.

Abstract: A turbo fluid machine includes a rotating member having a bearing-contact surface; an operating part configured to rotate together with the rotating member to compress and discharge a fluid; a housing accommodating the rotating member and the operating part; and a foil bearing having a bearing surface that faces the bearing-contact surface and supporting the rotating member such that the rotating member is rotatable relative to the housing. At least one of the bearing-contact surface or the bearing surface has thereon a coating layer. The coating layer comprises polyamide-imide serving as a binder resin and molybdenum disulfide serving as a solid lubricant. A mass ratio of molybdenum disulfide to polyamide-imide is 0.42 or more.

Abstract: An electric compressor includes: a compression mechanism; a motor mechanism; an inverter; a housing accommodating the compression mechanism, the motor mechanism, and the inverter; and a power supplier. The power supplier includes a connector and a cable extending toward an outside of the housing. The connector includes a first protrusion extending toward the outside of the housing. The first protrusion includes an end surface that has an insertion hole into which the cable is inserted, and a side surface that cylindrically extends and is connected to the end surface. A second protrusion is formed integrally with the side surface and extends downward from the side surface in a gravity direction corresponding to a direction in which the gravity is applied to the housing. A water droplet having reached the insertion hole along the cable is guided from the insertion hole to the second protrusion along the end surface.

Abstract: A power storage cell is provided with a positive electrode, a negative electrode, a separator, and a spacer. The positive electrode has: a first current collector; and a positive electrode active material layer provided on a one surface of the first current collector. The negative electrode has: a second current collector; and a negative electrode active material layer provided on a one surface of the second current collector. The separator has a base material layer, a first adhesive layer, and a second adhesive layer. The one surface of the first current collector is adhered to the first adhesive layer in an edge portion of the separator. The spacer is adhered to the second adhesive layer in the edge portion of the separator.

Abstract: A voltage detection unit includes a voltage detection terminal configured to be conductively connected to a detection target, an electric wire conductively connected to the voltage detection terminal and a housing having a plate shape and including a terminal accommodating concave configured to accommodate the voltage detection terminal, an electric wire accommodating concave defined by a first groove side wall, a second groove side wall and a groove bottom surface, and configured to accommodate the electric wire and to guide the electric wire out of the housing and an electric wire restricting portion configured to hold the electric wire between the electric wire restricting portion and the groove bottom surface and to prevent the electric wire from being displaced out of the electric wire accommodating concave.

Abstract: An electric compressor includes a compression portion, an electric motor, a drive circuit that has a circuit board on which electronic components are mounted, a housing, and a resin member. At least one of the electronic components is held by the resin member with the resin member sandwiched between the at least one of the electronic component and the circuit board. The electronic compressor includes a first metal member that is in contact with the at least one of the electronic components, and thermally connected to the housing, a second metal member that is disposed in the resin member, and a bolt by which the first metal member and the second metal member are fastened with each other.

Abstract: A control unit configured to control an electric turbocharger and an EGR valve. While an internal combustion engine is stopped, an oxygen-free period, which is a period during which oxygen surrounding an exhaust gas purifier used for an oxidation reaction runs out, is estimated based on a temperature of the exhaust gas purifier. Before entering the oxygen-free period, the EGR valve is opened and the electric turbocharger is driven. Air surrounding the exhaust gas purifier is replaced with fresh air. After replacement with the fresh air has been completed, the electric turbocharger is stopped.

Abstract: A centrifugal compressor that includes: a rotary shaft; a compressor impeller mounted on the rotary shaft and configured to rotate together with the rotary shaft to compress a fluid; a housing accommodating the rotary shaft and the compressor impeller; and a thrust bearing supporting the rotary shaft in a thrust direction such that the rotary shaft is rotatable. The housing includes: an impeller chamber in which the compressor impeller is accommodated; a thrust bearing accommodation chamber in which the thrust bearing is accommodated; and a partition wall separating the impeller chamber from the thrust bearing accommodation chamber. The partition wall has therein a cooling gas passage through which cooling gas flows to cool the thrust bearing and a cooling water passage through which cooling water flows to cool the partition wall.

Abstract: A power storage device includes a power storage module, a pair of current collector plates configured to be stacked to interpose the power storage module in a first direction that is vertical, a pair of insulating plates configured to be stacked to interpose the power storage module and the pair of current collector plates in the first direction; and a pair of restraint plates configured to be stacked to interpose the power storage module, the pair of current collector plates, and the pair of insulating plates in the first direction. The power storage module is configured to include an accommodation space that accommodates an electrolytic solution together with a power generation element. A pressure adjustment valve communicating with the accommodation space is provided on a side surface of the power storage module.

Abstract: A voltage detection unit includes a voltage detection terminal, an electric wire, a housing including a terminal accommodating concave and an electric wire accommodating concave, and a cover. The cover includes an extension piece extending in a first direction in which the cover is attached to the housing. The housing includes an accommodating hole to accommodate the extension piece. The electric wire accommodating concave includes an inclined surface and a guide surface. The inclined surface is inclined with respect to the first direction such that a first thereof end is provided closer to the accommodating hole than a second end thereof in a second direction perpendicular to the first direction and being parallel to the housing. The guide surface is continuous with the inclined surface and continuous with an inner wall surface of the accommodating hole.

Abstract: An electric compressor includes a cylindrical motor housing, an inverter case, and a conductive member. The inverter case is joined to an end portion of the motor housing. The inverter case includes a cylindrical case peripheral wall surrounding the end portion. The end portion has an end face that extends in a radial direction of the motor housing and a peripheral surface that extends in an axial direction of the motor housing and is connected to the end face. A ring-shaped sealing member is disposed between the peripheral surface and the case peripheral wall. An accommodation groove for accommodating the sealing member is recessed in the peripheral surface. The sealing member is held by the peripheral surface and the case peripheral wall in a radial direction of the sealing member to seal a space in which the conductive member is disposed.

Abstract: A controller for an electric motor comprises: an estimator configured to estimate a position of a rotor by using a d-axis current, a q-axis current, a d-axis voltage command value, and a q-axis voltage command value from which a noise is removed by a filter having a first time constant when a torque command value is equal to or greater than zero, and estimate a rotational speed of the electric motor and the position by using the d-axis current, the q-axis current, the d-axis voltage command value, and the q-axis voltage command value from which a noise is removed by a filter having a second time constant smaller than the first time constant when the torque command value is less than zero