Rotor for rotary electric machine
First Claim
1. A rotor for a rotary electric machine, comprising:
- a rotation shaft;
a plurality of rotor cores fixed to the rotation shaft and axially split, each of the rotor cores having outer peripheral surfaces with a circular cross section; and
permanent magnets arranged at equal circumferential intervals and extending through the rotor cores;
wherein voids which axially penetrate the rotor cores are formed between the outer peripheral surfaces of the rotor cores and the permanent magnets, and the voids of two adjacent rotor cores are formed at circumferentially different positions.
1 Assignment
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Accused Products
Abstract
A rotor (10) for a rotary electric machine (1) comprises a rotation shaft (11), and a plurality of rotor cores (120-129) fixed to the rotation shaft (11) and axially split. The rotor cores (120-129) have outer peripheral surfaces (120A-129A) with a circular cross section. Permanent magnets (13) extending through the rotor cores (120-129) are arranged at equal circumferential intervals. Voids (120B-129B) extending axially through the rotor cores (120-129) are formed between the outer peripheral surfaces (120A-129A) and the permanent magnets (13). The voids (120B-129B) of two adjacent rotor cores (120-129) are formed at circumferentially different positions, thereby being capable of suppressing the cogging torque without introducing a reduction in output torque.
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Citations
8 Claims
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1. A rotor for a rotary electric machine, comprising:
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a rotation shaft;
a plurality of rotor cores fixed to the rotation shaft and axially split, each of the rotor cores having outer peripheral surfaces with a circular cross section; and
permanent magnets arranged at equal circumferential intervals and extending through the rotor cores;
wherein voids which axially penetrate the rotor cores are formed between the outer peripheral surfaces of the rotor cores and the permanent magnets, and the voids of two adjacent rotor cores are formed at circumferentially different positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification