Rotor for rotating electrical machine, and rotating electrical machine provided with said rotor

1. A rotor for a rotating electrical machine, the rotor comprising:

a shaft supported in a rotatable manner;

a rotor core secured to the shaft;

an attachment board fixed to the shaft so as to rotate along with the shaft and the rotor core;

an electronic device fixed on a surface of the attachment board on an outer side in the axial direction of the rotor;

a coil wound around the rotor core and connected to the electronic device and having a higher heat resistance temperature than a heat resistance temperature of the electronic device; and

a cooling structure configured to first cool the electronic device disposed on an inner diameter side with respect to the coil and subsequently cool the coil with a liquid refrigerant supplied from a refrigerant supply channel configured to supply the liquid refrigerant flowing in the shaft to the outside of the shaft,

wherein the electronic device and a coil end of the coil which are cooled by the liquid refrigerant supplied from the refrigerant supply channel are aligned in a radial direction at an axial position of the refrigerant supply channel in an axial direction of the rotor, and

wherein the electronic device is indirectly cooled by the liquid refrigerant via the attachment board or via a mold resin portion provided to cover the electronic device.

2. The rotor for a rotating electrical machine according to claim 1 , wherein

the rotor core includes a plurality of salient poles in an outer circumferential portion thereof, and

coil includes a common coil wound on an inner diameter side of the salient pole with respect to a radial direction of the rotor core for magnetizing the salient pole, and an induction coil wound on an outer diameter side of the salient pole and also connected to the common coil for generating induced current in response to a change in a magnetic flux from a stator.

3. The rotor for a rotating electrical machine according to claim 2 , wherein

the common coil is wound around an outer circumference of the induction coil so as to partially overlap the induction coil so that the induction coil is exposed at an outer diameter side portion.

4. The rotor for a rotating electrical machine according to claim 1 , wherein,

the electronic device is disposed on one end surface in the axial direction of the rotor core; and

the liquid refrigerant flowing in a refrigerant channel within the shaft is supplied from one end portion side in the axial direction of the shaft on which the electronic device is disposed.

5. A rotating electrical machine, comprising:

the rotor for a rotating electrical machine according to claim 1 ; and

a stator disposed opposite the rotor to cause a rotating magnetic field to act on the rotor.