Rotary electric machine

A rotary electric machine, comprising a rotor configured to be rotated with a shaft serving as a rotary shaft,

• wherein the rotor includes:
• a rotor core;
• a plurality of permanent magnets to be embedded in the rotor core;
• and
• a one end-side end plate configured to support one end side of the rotor core,
• an another end-side end plate configured to support another end side of the rotor core,
• wherein the shaft has a shaft radial refrigerant passage passing in a radial direction of the shaft,
• wherein the rotor core has a plurality of rotor refrigerant passages through which refrigerant for cooling the plurality of permanent magnets flows in an axial direction of the shaft,
• wherein the rotor core has radially inner-side flux barriers formed on an inner side of the permanent magnets in the radial direction of the shaft and radially outer-side flux barriers formed on an outer side of the permanent magnets in the radial direction of the shaft, each of the radially inner-side flux barriers and the radially outer-side flux barriers is a hole passing through the rotor core in the axial direction of the shaft,
• wherein the one end-side end plate has an end plate refrigerant passage, which is configured to bring the plurality of rotor refrigerant passages and the shaft radial refrigerant passage into communication with each other, and is formed over an entire circumference of the shaft,
• wherein the end plate refrigerant passage has a plurality of refrigerant reservoirs, each projecting to an outer side in the radial direction of the shaft,
• wherein each of the plurality of refrigerant reservoirs is arranged at a position for cooling one corresponding pair of permanent magnets of the plurality of permanent magnets and each of the plurality of refrigerant reservoirs communicates with two of the radially inner-side flux barriers,
• wherein the radially inner-side flux barriers communicate with the radially outer-side flux barriers through holes in which the permanent magnets are inserted, and
• wherein the another end-side end plate includes refrigerant discharge holes which communicate with the radially outer-side flux barriers and discharge the refrigerant, and the refrigerant is distributed from the rotor refrigerant passages and the radially inner-side flux barriers to the radially outer-side flux barriers through the holes in which the permanent magnets are inserted, and is discharged from the refrigerant discharge holes to the outside of the rotor.