| 摘要 |
PROBLEM TO BE SOLVED: To reduce stress concentration generated in the vicinity of a slot 12 in which a permanent magnet 10 is embedded, in a permanent magnet type rotary electric machine 1.SOLUTION: A permanent magnet 10 has a configuration in which it is arranged in a slot 12 so that a magnetization direction is inclined with respect to a radial direction of a rotor core 9, a gap in a magnetization vertical direction is formed between corner parts 20a, 20c and a slot inner peripheral surface 25 so that the stress concentration due to heat stress is not generated in the vicinity of the corner parts 20a, 20c where the stress concentration due to centrifugal force tends to be generated, and the corner parts 20a, 20c do not press the rotor core 9 when the permanent magnet 10 expands due to the heat. Therefore, the stress concentration due to the centrifugal force and the stress concentration due to the heat stress are not overlappingly generated at the same place and the stress concentration generated in the vicinity of the slot 12 can be reduced. |
