| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique that is able to accurately correct unbalance of a rotor and is able to extend the length of a permanent magnet.SOLUTION: A rotor core 310 is composed of a stack of electromagnetic steel sheets, and has a body part 310a and a first balance adjustment part 310b and a second balance adjustment part 310c that are provided on the axial one and the other sides of the body part 310a. The length M1 of the first balance adjustment part 310b is greater than the length M2 of the second balance adjustment part 310c. The lengths L1 of permanent magnets 341 provided in the body part 310a and first balance adjustment part 310b are equal to the lengths L2 of the permanent magnets 342 provided in the body part 310a and second balance adjustment part 310c. The axial one end part of the permanent magnet 341 is restricted in movement in an axial one direction, by a bridge part 313c formed in one of the electromagnetic steel sheets composing the balance adjustment part 310b. |
