Patent ID: 8242645
Filing Date: 2012-08-14
Classification: H02K

Abstract:
1. A rotating electric machine comprising: a rotation shaft arranged rotatably; a rotor having a storing hole capable of storing a permanent magnet, including the permanent magnet stored in said storing hole, and being fixed to said rotation shaft; a stator facing said rotor and including a coil; an end plate provided at an axial end of said rotor; a coolant passage formed in said end plate and running along an axial end of said permanent magnet for allowing a coolant to flow, said end plate having a discharge hole communicating with said coolant passage and capable of discharging said coolant, a cooling target region including said permanent magnet being defined at a portion of said rotor located at an outer circumferential side of said rotor with respect to a radially inner end of said permanent magnet, said discharge hole being located at a radially inner side of said rotor with respect to said cooling target region, and said coolant passage includes a first flow passage and a second flow passage, said first flow passage formed by the axial end of the rotor and the end plate, extending in a radial direction of said rotor, said coolant passage reaching said cooling target region and being formed such that a width of said rotor in a circumferential direction increases toward a radially outer side of said rotor, and said second flow passage formed by the end plate, connected to said first flow passage and extending from a connection point with the first flow passage to the radially inner side of said rotor to reach said discharge hole.