Permanent magnet embedded motor, rotor for motor and method for manufacturing motor and rotor

A method for manufacturing a rotor for a permanent magnet embedded motor, the rotor comprising a rotor core made of magnetic material and having a plurality of slits formed at corresponding poles of the rotor core, the method comprising the steps of:

• preparing at least one plate-shaped bond magnet, wherein at least one of a length dimension and a width dimension of the bond magnet in a cross-section orthogonal to a shaft of the rotor is greater than a corresponding dimension of a corresponding one of the slits;
• placing against the rotor core a gate member having a tapered pathway with an exit opening smaller than an opening section of one of the slits;
• and
• pressing in the bond magnet into the tapered pathway continuous with the slit, and pushing the bond magnet into the one of the slits while deforming the bond magnet.

A method for manufacturing a rotor for a permanent magnet embedded motor, the rotor comprising a rotor core made of magnetic material and having a plurality of slits formed at corresponding poles of the rotor core, the method comprising the steps of:

• preparing plate-shaped bond magnets, in which at least one of the length dimension or width dimension of each of the bond magnets in a cross-section thereof orthogonal to a shaft of the rotor is greater than a corresponding dimension of each corresponding one of the slits;
• magnetizing the bond magnets before the bond magnets are inserted in the slits;
• and
• press-fitting the bond magnets that are magnetized into the slits of the rotor core.