| 摘要 |
PROBLEM TO BE SOLVED: To allow a permanent magnet to be easily arranged into a rotor core and decrease in torque to be suppressed to the minimum.SOLUTION: Each of two pairs of permanent magnets 12 and 13 is constituted of three magnets with the same polarity (three magnets with the same polarities 12a, 12b and 12c and three magnets with the same polarities 13a, 13b and 13c) arranged adjacently in a circumference direction of a rotor 2. In a rotor core 11 is formed magnet fitting holes 11b, which store the magnets with the same polarities 12a, 12b, 12c, 13a, 13b and 13c, for every magnet with the same polarities. Thicknesses a of parts 18 between the same polarities of the rotor core 11 are thinner than thicknesses b of parts 19 between the different polarities of the rotor core 11.SELECTED DRAWING: Figure 2 |
