Patent ID: 8766497
Filing Date: 2014-07-01
Classification: H02K

Abstract:
1. A rotating electrical machine comprising: an annular stator core; a coil that is wound around the stator core and includes a first coil end portion that protrudes from one end surface of the stator core and a second coil end portion that protrudes from another end surface of the stator core; a first coolant passage that is a coolant passage formed around the first coil end portion; a first coolant supply port provided in the first coolant passage; a second coolant passage that is a coolant passage formed around the second coil end portion; a second coolant supply port provided in the second coolant passage; a cover body formed by a pair of coil end covers, each one of the coil end covers having a projection extending in an axial direction of the stator core, which forms a gap that communicates the first coolant passage with the second coolant passage on the an inside of the stator core; and a plurality of connecting wires that are provided in the first coolant passage, each of the connecting wires extending at an angle from a radial outside of the stator core to a radial inside of the stator core, when viewed from the axial direction of the stator core, and connecting a beginning of the coil to an end of the coil, wherein a direction in which coolant flows through the first coolant passage is the same as a direction in which the plurality of connecting wires extend at the angle from the radial outside of the stator core toward the radial inside of the stator core, in a circumferential direction of the stator core, and a flowrate of coolant in the first coolant passage is set larger than a flowrate of coolant in the second coolant passage so as to create a pressure difference between the first coolant passage and the second coolant passage which causes the coolant to flow into the gap.