| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide cooling for permanent magnets in a rotor of a motor. <P>SOLUTION: A rotor 5 of a motor generator 4 has permanent magnets 6 arranged on an outer edge thereof. A hollow, disk-shaped rotary member 21 is provided adjacent to the rotor 5, and is rotated along with the rotor 5. The rotary member 21 has a predetermined amount of coolant 25 encapsulated in a space 24 formed therein. A shaft 3 mounted to the center of the rotary member 21 has a cooling water passage 22 formed therein that allows cooling water 26 to pass therethrough. When the rotor 5 is rotated, thus, the rotary member 21 is also rotated, and the coolant 25 in a liquid state is eccentrically located on an outer edge side of the space 24 by centrifugal force so as to continuously cool the permanent magnets 6 arranged on the outer edge of the rotor 5. <P>COPYRIGHT: (C)2013,JPO&INPIT |
