Abstract: A bearing condition monitoring device is a bearing condition monitoring device for monitoring a condition of a thrust bearing for holding a rotational shaft in a thrust direction. The bearing condition monitoring device includes a first temperature sensor for measuring a temperature of the thrust bearing, and an arithmetic device for counting a frequency at which an evaluation index of a thrust load on the basis of a measurement value by the first temperature sensor exceeds an allowable value, and for outputting an abnormality in the condition of the thrust bearing if the counted frequency exceeds a threshold. The arithmetic device may count, as the frequency, only a case where a state in which the thrust load exceeds an upper limit load continues for not less than a predetermined time.

Abstract: A rotary electric machine includes a housing, a stator disposed in the housing, and at least two support members disposed in at least two different parts, respectively, in an axial direction of the stator between the housing and an outer circumferential surface of the stator, the at least two support members supporting the stator against the housing. The at least two support members, the housing, and the outer circumferential surface of the stator form a space.

Abstract: The objective of the present invention is to provide a compressor with which it is possible to simplify the manufacture of a soundproof cover. A compressor (1) is provided in an air conditioning device for an automobile. The compressor (1) is provided with: a main body portion which has a discharge port (12) and which compresses a refrigerant; and a soundproof cover (20) which includes a first cover (30) and a second cover (40), separate from the first cover (30), and inside which an internal space is formed, the main body portion being accommodated in the internal space.

Abstract: A compressor (100) comprises a compressor body (10), a pipe (20) connected to the compressor body (10), and an acoustic cover disposed so as to surround the compressor body (10). The acoustic cover (30) has an insertion hole (31) through which the pipe (20) is inserted while being in close contact with the pipe (20), and an inner surface (30A) of the acoustic cover has a shape that traces an outer surface (10A) of the compressor body (10). Due to this configuration, it is possible to reduce the size and the weight of the acoustic cover (30), and by using the acoustic cover (30) with a simpler structure, it is possible to reduce the noise of the compressor (100) of this automobile air conditioning device.

Abstract: Provided is an electric compressor in which there are fewer instances of a magnetic force line being blocked more than necessary by a through-hole for a bolt, the number of components and number of machining steps do not increase as much, and the degree of adhesion of a laminated steel plate can be increased to ensure stiffness. A stator has a stator core (35) configured by laminating a plurality of electromagnetic steel plates in an axial direction, the electromagnetic steel plates having a substantial ring shape as seen from the axial direction. As seen from the axial direction, a plurality of through-holes (40) are formed through the stator core (35) in the lamination direction of the electromagnetic steel plates, on the same circle centered around the axis line, and as seen from the axial direction, a first arc length (L1) or a second arc length (L2) longer than the first arc length (L1) is set as each arc length between through-holes (40) adjacent in the circumferential direction.

Abstract: A bearing condition monitoring device is a bearing condition monitoring device for monitoring a condition of a thrust bearing for holding a rotational shaft in a thrust direction. The bearing condition monitoring device includes a first temperature sensor for measuring a temperature of the thrust bearing, and an arithmetic device for counting a frequency at which an evaluation index of a thrust load on the basis of a measurement value by the first temperature sensor exceeds an allowable value, and for outputting an abnormality in the condition of the thrust bearing if the counted frequency exceeds a threshold. The arithmetic device may count, as the frequency, only a case where a state in which the thrust load exceeds an upper limit load continues for not less than a predetermined time.

Abstract: An electric compressor includes a compressor unit configured to compress air and a motor unit configured to drive the compressor unit. The motor unit includes a housing that forms an outer frame of the motor unit, a rotor that is provided in the housing and rotatably supported around a central axis O, a stator that is disposed radially outward from the rotor, and a stator holder which is fixed to the housing only in a part in a central axis O direction and is provided such that there is a gap in a radial direction crossing the central axis O between it and an inner circumferential surface of the housing in the rest in the central axis O direction and inside which the stator is accommodated.

Abstract: A rotary electric machine includes a housing, a stator disposed in the housing, and at least two support members disposed in at least two different parts, respectively, in an axial direction of the stator between the housing and an outer circumferential surface of the stator, the at least two support members supporting the stator against the housing. The at least two support members, the housing, and the outer circumferential surface of the stator form a space.

Abstract: A circuit assembly (20) provided with: a circuit board (21); a capacitor (30) connected to the circuit board (21); and a circuit casing (20C) configured to house the circuit board (21) and the capacitor (30). The capacitor (30) is provided with: a component body (31) including a pair of connection terminals (32A and 33A) to be fixed to the circuit board (21); and a first fixing unit (41) and a second fixing unit (42) configured to fix the component body (31) to the circuit casing (20C) at both sides. The connection terminals (32A and 33A) are disposed with a fixed line (L1) connecting the first fixing unit (41) and the second fixing unit (42) interposed therebetween, and both of the pair of connection terminals (32A and 33A) protrudes sideward from the component body (31) between a first surface of the circuit board (21) and the circuit casing (20C), and extends toward the circuit board (21).

Abstract: A drive apparatus providing a heat source and driving a switching element, along with a corresponding method of using the drive apparatus. The switching element includes a transistor having a high-heat resistant semiconductor including silicon carbide. The drive apparatus is provided with a voltage adjusting unit that varies a drive voltage to be applied to a conduction control terminal of the switching element in order to put the switching element in an ON state, and the voltage adjusting unit applies, as the drive voltage, a voltage in an active region of the transistor to the conduction control terminal.

Abstract: An electric compressor includes a compressor unit configured to compress air and a motor unit configured to drive the compressor unit. The motor unit includes a housing that forms an outer frame of the motor unit, a rotor that is provided in the housing and rotatably supported around a central axis O, a stator that is disposed radially outward from the rotor, and a stator holder which is fixed to the housing only in a part in a central axis O direction and is provided such that there is a gap in a radial direction crossing the central axis O between it and an inner circumferential surface of the housing in the rest in the central axis O direction and inside which the stator is accommodated.

Abstract: A circuit assembly (20) provided with: a circuit board (21); a capacitor (30) connected to the circuit board (21); and a circuit casing (20C) configured to house the circuit board (21) and the capacitor (30). The capacitor (30) is provided with: a component body (31) including a pair of connection terminals (32A and 33A) to be fixed to the circuit board (21); and a first fixing unit (41) and a second fixing unit (42) configured to fix the component body (31) to the circuit casing (20C) at both sides. The connection terminals (32A and 33A) are disposed with a fixed line (L1) connecting the first fixing unit (41) and the second fixing unit (42) interposed therebetween, and both of the pair of connection terminals (32A and 33A) protrudes sideward from the component body (31) between a first surface of the circuit board (21) and the circuit casing (20C), and extends toward the circuit board (21).

Abstract: An affixing structure that reduces costs and reduces the risk of vibration causing damage or the like to electrical connection terminals on an electronic component affixed to a circuit board is provided. In the affixing structure, which is affixed to a circuit board (21) via a plurality of lead frames (55) that are part of a transformer (50), at least one second side wall perpendicular to a first side wall where the lead frames (55) are arranged is adhesively supported on the circuit board (21) by a support (60). The height (H3) of the part of the support (60) in contact with the transformer (50) is greater than or equal to the height (H2) of the center of gravity of the electronic component, and the length (L) of the support (60) in the direction of the first side wall is greater than or equal to the height (H3).

Abstract: A refrigerant heating performance is increased while suppressing an increase in weight or cost. A vehicle air-conditioning device (10) is provided with a heat pump cycle (16) for heating operation in which an electric compressor (50) for compressing refrigerant, a vehicle-cabin-interior condenser (26), a throttle (52), and a vehicle-cabin-exterior heat exchanger (54) are connected in that order via refrigerant piping. An inverter for the electric compressor (50) in which a power element comprising a highly heat-resistant semiconductor device is used is disposed on the electric compressor (50) so that the refrigerant compressed by the electric compressor (50) can be heated by the power element. During heating operation of the heat pump cycle (16), the refrigerant is heated by the power element.

Abstract: An IGBT serving as a heat-generating electrical component mounted on the lower surface of a lower board serving as a control circuit board of an inverter is disposed in abutment with a heat-dissipating flat section provided on an inner wall of an inverter box provided on the outer periphery of a housing so that the heat of the IGBT is dissipated toward the housing. Moreover, a spacer member is interposed between the lower board and the IGBT so as to fill a space between the lower board and the IGBT, and the spacer member is rigid enough that the lower board and the IGBT are prevented from being displaced toward and away from each other.

Abstract: This invention provides an affixing structure that reduces costs and makes it possible to lower the risk of vibration causing damage or the like to electrical connection terminals on an electronic component affixed to a circuit board. The affixing structure, which is affixed to a circuit board (21) via a plurality of lead frames (55) that are part of a transformer (50), is characterized in that at least one second side wall that is perpendicular to a first side wall where the lead frames (55) are arranged is adhesively supported on the circuit board (21) by a support (60), the height (H3) of the part of the support (60) in contact with the transformer (50) is greater than or equal to the height (H2) of the center of gravity of the electronic component, and the length (L) of the support (60) in the direction of the first side wall is greater than or equal to the aforementioned height (H3).

Abstract: The purpose of the present invention is to ensure a heat source, while suppressing a weight increase and a cost increase. A drive apparatus (85) drives a switching element constituted by a transistor that includes a high-heat resistant semiconductor including silicon carbide. The drive apparatus (85) is provided with a voltage adjusting unit (93) that varies a drive voltage to be applied to a conduction control terminal of the switching element in order to put the switching element in an on state, and the voltage adjusting unit (93) applies, as the drive voltage, a voltage in an active region of the transistor to the conduction control terminal.

Abstract: A refrigerant heating performance is increased while suppressing an increase in weight or cost. A vehicle air-conditioning device (10) is provided with a heat pump cycle (16) for heating operation in which an electric compressor (50) for compressing refrigerant, a vehicle-cabin-interior condenser (26), a throttle (52), and a vehicle-cabin-exterior heat exchanger (54) are connected in that order via refrigerant piping. An inverter for the electric compressor (50) in which a power element comprising a highly heat-resistant semiconductor device is used is disposed on the electric compressor (50) so that the refrigerant compressed by the electric compressor (50) can be heated by the power element. During heating operation of the heat pump cycle (16), the refrigerant is heated by the power element.

Abstract: The purpose of the present invention is to integrate a heating air-conditioning configuration and a cooling system of a vehicle, to enable more efficient heating air conditioning. A vehicle air-conditioning device is provided with: a radiator used for cooling a vehicle-side heat-generating apparatus; a heater core that exchanges heat between a coolant and air to be blown into a vehicle cabin; and coolant passages through which the coolant flows so as to be circulated between the heater core and the radiator. Furthermore, the vehicle air-conditioning device is provided with a water heater which is integrated with a power element for air conditioning formed of a semiconductor element with high heat resistance and which causes the power element and a heat-generating body to heat the coolant flowing to the heater core.

Abstract: Provided are a circuit assembly including a circuit component fixing structure capable of preventing damage to a fixing portion and a connection terminal caused by vibrations, and a vehicular electric compressor. The circuit assembly includes: a circuit board; a circuit component connected to the circuit board; and a circuit casing housing both the circuit board and the circuit component. The circuit component includes a component body disposed facing the circuit board inside the circuit casing, a connection terminal directly fixed to the circuit board, and a first fixing portion and a second fixing portion that are fixed to the circuit casing around the component body. In a direction orthogonal to the circuit board, the first fixing portion is positioned on a side of the circuit board with respect to the center of gravity of the circuit component, and the second fixing portion is positioned on a side away from the circuit board with respect to the center of gravity.