Motor, and rotor, and manufacturing method for the rotor, and a motor provided with the rotor

A rotor comprising:

• a rotor shaft;
• a permanent magnet which is held on an outer periphery of the rotor shaft;
• and
• a protective layer which includes a fiber sheet hardened with resin for covering an outer peripheral side of the permanent magnet;
• wherein the fiber sheet comprises:
• a first fiber sheet whose width dimension is narrower than a width dimension in an axial direction of the permanent magnet;
• and
• a second fiber sheet which is provided with a width dimension equal to or more than a width dimension in the axial direction of the permanent magnet;
• and
• wherein the first fiber sheet and the second fiber sheet are wound around the outer peripheral side of the permanent magnet so as to overlap each other.

A manufacturing method for a rotor which is provided with a rotor shaft and a permanent magnet held on an outer periphery of the rotor shaft comprising:

• a first fiber sheet winding step in which a first fiber sheet whose width dimension is narrower than a width dimension in an axial direction of the permanent magnet is wound around an outer peripheral side of the permanent magnet;
• and
• a second fiber sheet winding step, which is performed before or after the first fiber sheet winding step, and in which a second fiber sheet whose width dimension is equal to or more than the width dimension in the axial direction of the permanent magnet is wound around the outer peripheral side of the permanent magnet;
• thereby the outer peripheral side of the permanent magnet is covered with a protective layer in which the fiber sheet is hardened with resin.

A motor comprising:

• a rotor comprising:
• a rotor shaft;
• a permanent magnet which is held on an outer periphery of the rotor shaft;
• and
• a protective layer which includes a fiber sheet hardened with resin for covering an outer peripheral side of the permanent magnet;
• wherein the fiber sheet comprises:
• a first fiber sheet whose width dimension is narrower than a width dimension in an axial direction of the permanent magnet;
• and
• a second fiber sheet which is provided with a width dimension equal to or more than a width dimension in the axial direction of the permanent magnet;
• and
• wherein the first fiber sheet and the second fiber sheet are wound around the outer peripheral side of the permanent magnet so as to overlap each other;
• and
• a stator for generating a rotating magnetic field to the rotor.