Abstract: An electric supercharger that can reduce vibration amplitude in an end of a shaft due to rotational vibration is provided. An electric supercharger 101 comprises: an impeller 40 for supercharging a fluid by rotation; an impeller chamber 15 for accommodating the impeller 40; a motor 30 for driving the impeller 40 to rotate; and a motor chamber 18 for accommodating the motor 30. An opening 28 is provided between the impeller chamber 15 and the motor chamber 18 wherein the fluid is able to pass therethrough. Seal structures 50, 51, 52 are provided for separating the motor chamber 18 from the exterior at portions other than the opening 28.

Abstract: An electric supercharger includes an electric motor, a compressor wheel rotated by the electric motor, and a compressor housing. The compressor housing includes a first passage through which air is introduced, an introducing port connecting to an EGR device, a second passage through which at least one of air and EGR gas is flowed, a bypass passage through which at least one of air and EGR gas is flowed, and a bypass valve to open and close the bypass passage. When the bypass valve is opened, air introduced from the first passage and EGR gas introduced from the introducing port are flowed through the bypass passage to the internal combustion engine. When the bypass valve is closed, air introduced from the first passage and EGR gas introduced from the introducing port are compressed in the compressor wheel and flowed through the second passage to the internal combustion engine.

Abstract: A control system for an internal combustion engine includes an electric supercharger that includes a compressor wheel that is configured to be rotated by an electric motor. The control system includes a bypass passage, a bypass valve, and an exhaust gas recirculation passage. The control device is configured to control the electric supercharger and the bypass valve based on an operation condition of the internal combustion engine. The control device is configured to cause a stepping operation of the electric supercharger in which acceleration and stopping of the compressor wheel are repeated within a predetermined cleaning time after operation of the internal combustion engine is stopped.

Abstract: An electric turbo-machine includes a housing, a rotating shaft rotatably supported by the housing through a rolling bearing, an impeller, and an electric motor. The housing has an oil supply section to which lubricating oil is supplied. A tubular oil supply member is mounted to the oil supply section. The oil supply member has a supply passage extending within the oil supply member in the axial direction of the oil supply member and in communication at a first end of the oil supply member with the oil supply section and an ejection hole in communication with the supply passage and configured so as to eject lubricating oil toward a portion between the inner ring and outer ring of the rolling bearing.

Abstract: There is provided an electric supercharger having a compressor including a compressor impeller, a motor housing, an electric motor rotationally driving the compressor, and a first bearing and a second bearing provided to support a shaft and a rotor in the motor housing. The first bearing is located on the compressor side of the rotor and the second bearing is located on the other side of the rotor. The motor housing includes a thermal conductive passage through which heat generated by a coil wound around a stator is transmitted to the first and second bearings. The thermal conductive passage between the coil and the first bearing is formed with a reduced thickness portion in such a way that thickness of the thermal conductive passage is reduced in a direction that is perpendicular to a direction in which the heat is transmitted through the thermal conductive passage.

Abstract: A control system for an internal combustion engine includes an electric supercharger that includes a compressor wheel that is configured to be rotated by an electric motor. The control system includes a bypass passage, a bypass valve, and an exhaust gas recirculation passage. The control device is configured to control the electric supercharger and the bypass valve based on an operation condition of the internal combustion engine. The control device is configured to cause a stepping operation of the electric supercharger in which acceleration and stopping of the compressor wheel are repeated within a predetermined cleaning time after operation of the internal combustion engine is stopped.

Abstract: An electric supercharger includes an electric motor, a compressor wheel rotated by the electric motor, and a compressor housing. The compressor housing includes a first passage through which air is introduced, an introducing port connecting to an EGR device, a second passage through which at least one of air and EGR gas is flowed, a bypass passage through which at least one of air and EGR gas is flowed, and a bypass valve to open and close the bypass passage. When the bypass valve is opened, air introduced from the first passage and EGR gas introduced from the introducing port are flowed through the bypass passage to the internal combustion engine. When the bypass valve is closed, air introduced from the first passage and EGR gas introduced from the introducing port are compressed in the compressor wheel and flowed through the second passage to the internal combustion engine.

Abstract: A sensorless electric motor control device is provided that completes a phase detection of a rotor before an activation signal is received, so as to shorten a time period from when the activation signal is received to when the rotor reaches a target number of rotations. The control device for a sensorless electric motor 10 includes an inverter 11 that drives the electric motor 10 and a first processor 18 that serves as a phase detection unit that causes the inverter 11 to perform a phase detection before the inverter 11 receives an activation signal that activates the electric motor 10, wherein the phase detection aligns a magnetic pole of a rotor of the electric motor 10 with a predetermined position with respect to a stator.

Abstract: An electric supercharger includes an electric motor, a motor housing, a drive circuit, a circuit housing, and a compressing portion. The circuit housing includes an accommodating wall having a shape projecting from an outer surface of the motor housing, and a bottom located at a distal end in the projecting direction of the accommodating wall. The circuit housing together with the motor housing, hermetically confines the drive circuit. The bottom includes a heat release portion that faces the outer side of the circuit housing. The drive circuit is thermally coupled to an inner surface of the heat release portion that faces the inner side of circuit housing.

Abstract: An electric supercharger having an impeller that rotates in order to supercharge a fluid includes: a housing; a shaft supported to be capable of rotating relative to the housing via a first bearing and a second bearing; a first bearing sleeve and a second bearing sleeve fixed to the housing in order to support the first bearing and the second bearing, respectively; and a first rubber sheet and a second rubber sheet provided between the housing and the first bearing sleeve and the second bearing sleeve, respectively, in an axial direction X. With this electric supercharger configured in the abovementioned manner, elastic members can be incorporated easily between a housing and respective bearing sleeves, and an offset load can be prevented from acting on a pair of bearings supported by the respective bearing sleeves.

Abstract: There is provided an electric supercharger having a compressor including a compressor impeller, a motor housing, an electric motor rotationally driving the compressor, and a first bearing and a second bearing provided to support a shaft and a rotor in the motor housing. The first bearing is located on the compressor side of the rotor and the second bearing is located on the other side of the rotor. The motor housing includes a thermal conductive passage through which heat generated by a coil wound around a stator is transmitted to the first and second bearings. The thermal conductive passage between the coil and the first bearing is formed with a reduced thickness portion in such a way that thickness of the thermal conductive passage is reduced in a direction that is perpendicular to a direction in which the heat is transmitted through the thermal conductive passage.

Abstract: A sensorless electric motor control device is provided that completes a phase detection of a rotor before an activation signal is received, so as to shorten a time period from when the activation signal is received to when the rotor reaches a target number of rotations. The control device for a sensorless electric motor 10 includes an inverter 11 that drives the electric motor 10 and a first processor 18 that serves as a phase detection unit that causes the inverter 11 to perform a phase detection before the inverter 11 receives an activation signal that activates the electric motor 10, wherein the phase detection aligns a magnetic pole of a rotor of the electric motor 10 with a predetermined position with respect to a stator.

Abstract: An electric supercharger that can reduce vibration amplitude in an end of a shaft due to rotational vibration is provided. An electric supercharger 101 comprises: an impeller 40 for supercharging a fluid by rotation; an impeller chamber 15 for accommodating the impeller 40; a motor 30 for driving the impeller 40 to rotate; and a motor chamber 18 for accommodating the motor 30. An opening 28 is provided between the impeller chamber 15 and the motor chamber 18 wherein the fluid is able to pass therethrough. Seal structures 50, 51, 52 are provided for separating the motor chamber 18 from the exterior at portions other than the opening 28.

Abstract: An electric supercharger wherein the assemblability of a bearing holding structure is improved is provided. An electric motor 30 of an electric supercharger 101 has a shaft 22. A second bearing 24 supports the shaft 22 rotatably. The second bearing 24 comprises an outer ring 24a and an inner ring 24b rotatable with respect to each other. A second bearing sleeve 26 supports the outer ring 24a as a fixed ring. A key ring 51 positions the outer ring 24a with respect to the second bearing sleeve 26. A preloading spring 52 energizes the key ring 51 toward the outer ring 24a or the second bearing sleeve 26.

Abstract: Provided are a display device capable of suppressing occurrence of defective products due to fastening defect of screws, having excellent productivity and workability, achieving narrowing of frame and thinning of set thickness with excellent appearance quality, and manufacturing at a low cost, as well as a television receiver including the display device. A TV receiver includes a display module, and horizontal frames which cover long side peripheral end part of a front surface of the display module. A first plate part and a second plate part forming each side of L-shaped connectors are provided with a plurality of female screws. The horizontal frame includes an end edge covering part which covers long side end edge part of the display module, and a side covering part which covers a side part thereof, and a protruding part which protrudes inwardly of the side covering part. The protruding part is provided with a plurality of screw insertion holes.

Abstract: Provided are a display device which is capable of suppressing occurrence of defective products due to fastening defect of screws, having excellent productivity, workability, and maintenance management properties, achieving narrowing of frame and thinning of set thickness with excellent quality, and manufacturing at a low cost, as well as a television receiver including the display device. A TV receiver includes a display module, and horizontal frames which cover long side peripheral end parts of a front surface of the display module. A screwing part of the fixing member is provided with female screw. The horizontal frame includes an end edge covering part which covers a long side end edge part of the display module and a side covering part which covers a side thereof, and a protruding part which protrudes inwardly of the side covering part. The protruding part is provided with screw insertion hole and notches.

Abstract: Provided is a technology which makes an undercut portion small and reduces a limit on a mold structure in a wire holder mounting structure. A holder fixing portion (30) formed in a cabinet (20) is configured by including a box portion (32) and a holding rib (40). The box portion (32) has an open in an upper side in drawings, and is configured by right and left wall surfaces (32a), a rear wall surface (32b) and a bottom surface (32c). A holder mounting hole (34) is formed in the rear wall surface (32b), and a wire holder (90) is inserted in a direction of the holder mounting hole (34) (direction of an arrow X1 in the drawings) to be fixed. In the fixed state, a leaf spring portion (92) (holding portion) of the wire holder (90) is placed so as to be in contact with the holding rib (40).