| 摘要 |
A rotor of an electric motor, comprising a rotor core (5) formed integrally by stacking a plurality of steel sheets (1), a plurality of punched-out holes (6) passed through the rotor core adjacently to each other and along the outer periphery of the rotor core (5), and permanent magnets (7) fitted into the punched-out holes and integrally fixed to the rotor core (5), wherein the width dimensions of bridge parts (10) formed between the end edge of the punched-out holes and the peripheral surface of the rotor core (5) are set so that the width dimension (W2) of the bridge part (10a) on the rotating direction side is larger than that (W1) of the bridge part (10b) on the anti-rotating direction side (W1 < W2) at the end parts of the punched-out holes adjacent to each other, whereby an increase in leaked magnetic flux due to an increase in the width dimension of the bridge part can be suppressed to prevent the characteristics of the motor from deteriorating.
|
