Abstract: Improving the coercive force of magnets used in a rotary electric machine by arranging magnets such that a q-axis side portion is located on an outer diameter side with respect to a d-axis side portion, and a magnet thickness Ti on an inner diameter side (d-axis side) of a rotor core is formed to be larger than a magnet thickness To on the outer diameter side (q-axis side) of the rotor core. An axial space is formed in the magnets such that when the lateral cross section of each of the magnets is divided into an outer diameter side region112o and an inner diameter side region112i in a manner that the lateral cross section areas are equal to each other with a circumference C around a rotation center as a boundary, and a space density of the axial space in the inner diameter side region112i is larger than a space density of the axial space in the outer diameter side region112o.

Abstract: An object of the present invention is to improve cooling capability of a bus bar with a simple system. An electric system includes a motor unit including a stator and a rotor, the motor unit being cooled by a refrigerant, an inverter unit that supplies electric power to a winding of the stator, a wiring portion that transmits electric power output from the inverter unit to the motor unit, and a pipe that supplies or discharges a refrigerant to or from the motor unit. The pipe is provided at a position at which the wiring portion can exchange heat with an oily medium cooled by the pipe.

Abstract: An object of the present invention is to provide a highly efficient and highly reliable rotary electric machine. A rotary electric machine includes: a stator around which a plurality of coils are wound; and a rotor which is supported to be freely rotatable with a predetermined gap with respect to the stator. The coil has at least one connection portion per turn in a slot of the stator. Conductors to be connected mutually have steps at the connection portion, and are fitted with other conductors so as to mutually fill the steps. The steps have contact surfaces that come into contact with each other in the slot to be electrically conducted. A thermally expandable sheet capable of pressurizing the coil in a radial direction of the stator is arranged in the slot.

Abstract: An object of the present invention is to provide a rotary electric machine capable of reducing a difference between a height of a first segment conductor and a height of a second segment conductor. A first segment conductor 121 having a first slot pitch and a second segment conductor 122 having a second slot pitch smaller than the first slot pitch are provided, the second segment conductor 122 includes a first leg portion 122A and a second leg portion 122B, the first leg portion 122A includes a slot insertion portion 122A0 and a first linear portion 122A2 connected to the slot insertion portion 122A0 and constituting a coil end portion, the second leg portion 122B includes a slot insertion portion 122B0 and a second linear portion 122B2 connected to the slot insertion portion 122B0 and constituting a coil end portion, and the second linear portion 122B2 is longer than the first linear portion 122A2.

Abstract: A power semiconductor device according to the present invention is provided with a conductive section, a circuit component, a substrate that supports the conductive section and the circuit component, and a sealing member, wherein the sealing member forms a first flow path, and the first flow path has a first region thermally connected to a power circuit and a second region thermally connected to the circuit component.

Abstract: An object of the present invention is to provide a rotary electric machine in which damage of a magnet is suppressed and cooling performance of the magnet is improved. The present invention includes a rotation shaft 21, a rotor 20, and core end members 204 and 205 connected to end portions of the rotor 20. The rotor 20 includes a magnet 201, a rotor core 200, and interposed members 301a and 301b interposed between the magnet 201 and the rotor core 200. In the rotor core 200, a magnet insertion hole 202 for disposing the magnet 201 and flux barriers 203a and 203b are formed. The rotation shaft 21 is provided with a first flow path 21a through which a refrigerant flows. The core end members 204 and 205 are provided with a second flow path 504a joining the first flow path 21a and the flux barrier 203a.

Abstract: An object of the present invention is to improve the holding power of magnets used in the rotary electric machine. In a lateral cross section, magnets 112-1, 112-2 are arranged such that a q-axis side portion is located on an outer diameter side with respect to a d-axis side portion, and a magnet thickness Ti on an inner diameter side (d-axis side) of a rotor core 111 is formed to be larger than a magnet thickness To on the outer diameter side (q-axis side) of the rotor core 111. An axial space 120 is formed in the magnets 112-1, 112-2.

Abstract: An object of the present invention is to provide a structure capable of stably holding a bonded magnet into a magnet insertion part of a rotor core. A rotor of a rotating electrical machine includes a bonded magnet 112, an elastic member 113 having a bent part 113a, and a rotor core provided with a magnet storage part storing the bonded magnet 112 and the elastic member 113. The elastic member 113 is embedded in the bonded magnet 112 in a state where at least a part of the bent part 113a is exposed from the bonded magnet 112, and an exposed part 113c of the bent part 113a from the bonded magnet 112 comes into contact with an inner wall of the magnet storage part 114 and elastically deforms.

Abstract: An object of the present invention is to improve cooling capability of a bus bar with a simple system. An electric system includes a motor unit including a stator and a rotor, the motor unit being cooled by a refrigerant, an inverter unit that supplies electric power to a winding of the stator, a wiring portion that transmits electric power output from the inverter unit to the motor unit, and a pipe that supplies or discharges a refrigerant to or from the motor unit. The pipe is provided at a position at which the wiring portion can exchange heat with an oily medium cooled by the pipe.

Abstract: An object of the present invention is to provide a highly efficient and highly reliable rotary electric machine. A rotary electric machine includes: a stator around which a plurality of coils are wound; and a rotor which is supported to be freely rotatable with a predetermined gap with respect to the stator. The coil has at least one connection portion per turn in a slot of the stator. Conductors to be connected mutually have steps at the connection portion, and are fitted with other conductors so as to mutually fill the steps. The steps have contact surfaces that come into contact with each other in the slot to be electrically conducted. A thermally expandable sheet capable of pressurizing the coil in a radial direction of the stator is arranged in the slot.

Abstract: There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as ?0, a relationship of ws>?0×I1×Tr/0.6 is met.

Abstract: A rotating electrical machine includes a rotating electrical machine body including a stator, a rotor, a fan configured to circulate a coolant for cooling the stator and the rotor, and a casing containing the stator, the rotor and the fan; and a cooler connected to the rotating electrical machine body. The coolant flows from the machine body into the cooler. The cooler cools the coolant. The coolant flows out of the cooler into the machine body. The cooler has a flow resistance Ra satisfying a relation 0.15<(Ra/Rm)<(P0/P1), wherein Ra is a flow resistance of the coolant in the cooler, Rm is a flow resistance of the coolant in the rotating electrical machine body, P0 is a shutoff pressure of the fan, and P1 is a pressure at an operating point of the fan when the flow resistance Ra of the cooler is assumed to be zero.

Abstract: There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as ?0, a relationship of ws>?0×I1×Tr/0.6 is met.

Abstract: A rotating electrical machine includes a rotating electrical machine body including a stator, a rotor, a fan configured to circulate a coolant for cooling the stator and the rotor, and a casing containing the stator, the rotor and the fan; and a cooler connected to the rotating electrical machine body. The coolant flows from the machine body into the cooler. The cooler cools the coolant. The coolant flows out of the cooler into the machine body. The cooler has a flow resistance Ra satisfying a relation 0.15<(Ra/Rm)<(P0/P1), wherein Ra is a flow resistance of the coolant in the cooler, Rm is a flow resistance of the coolant in the rotating electrical machine body, P0 is a shutoff pressure of the fan, and P1 is a pressure at an operating point of the fan when the flow resistance Ra of the cooler is assumed to be zero.

Abstract: The invention provides a rotating electrical machine system in which an air volume of a refrigerant is increased near the center of a rotating electrical machine in the axial direction is improved. The rotating electrical machine includes a rotor and a stator, in which the stator core, laminated electromagnetic steel sheets formed by laminating a plurality of electromagnetic steel sheets in the axial direction are divided into a plurality of sets of packet cores, and between one of the packet cores of the plurality of sets and another packet core adjacent to it, there is formed a duct providing a flow channel of the stator, and in a duct situated at the center side from both ends in the axial direction among the duct, there is a portion of two packet cores facing each other across the duct, a diameter direction length of the two packet cores becoming long.

Abstract: The invention provides a rotating electrical machine system in which an air volume of a refrigerant is increased near the center of a rotating electrical machine in the axial direction is improved. The rotating electrical machine includes a rotor and a stator, in which the stator core, laminated electromagnetic steel sheets formed by laminating a plurality of electromagnetic steel sheets in the axial direction are divided into a plurality of sets of packet cores, and between one of the packet cores of the plurality of sets and another packet core adjacent to it, there is formed a duct providing a flow channel of the stator, and in a duct situated at the center side from both ends in the axial direction among the duct, there is a portion of two packet cores facing each other across the duct, a diameter direction length of the two packet cores becoming long.

Abstract: There is provided an induction machine having a squirrel-cage rotor, the rotor including: a rotor core; a plurality of rotor slots formed on the rotor core and aligned circumferentially at a predetermined interval; a plurality of rotor bars inserted into one of the plurality of rotor slots; and a plurality of rotor slits formed adjacent to the plurality of rotor slots on an outer circumferential side of the rotor core. The each rotor slit is formed as a hollow such that a cross sectional shape thereof is distinguished into three parts of a slit outer circumferential part, a slit intermediate part, and a slit inner circumferential part. A circumferential width of the each rotor slit on an innermost circumferential side is larger than that on an outermost circumferential side. A circumferential width of the slit intermediate part increases from an outer circumferential side toward an inner circumferential side.

Abstract: A rotor slot is asymmetrically shaped with respect to a straight line drawn from the central axis of the rotation of the rotor in a radial direction, and has a slot opening, the circumferential width of which is smaller than that of the rotor slot, at the top of the rotor slot, so that a loss generated in the rotor due to a carrier harmonic component can be reduced and the power factor can be improved, enabling a current generated in an armature winding to be suppressed and thereby improving efficiency in a rated operation.

Abstract: A synchronous generator 1 including a rotor having a field winding placed in the slots thereof and a stator having an armature winding placed in the slots thereof, wherein the value of the number of slots per two poles in stator minus the number of slots per two poles in rotor is equal to or greater than +9, or equal to or smaller than ?9.

Abstract: A rotor slot is asymmetrically shaped with respect to a straight line drawn from the central axis of the rotation of the rotor in a radial direction, and has a slot opening, the circumferential width of which is smaller than that of the rotor slot, at the top of the rotor slot, so that a loss generated in the rotor due to a carrier harmonic component can be reduced and the power factor can be improved, enabling a current generated in an armature winding to be suppressed and thereby improving efficiency in a rated operation.