Abstract: A manufacturing method for a laminated rotor includes inserting a bridge member into a magnetic flux leakage suppression hole, thus allowing a tip of the bridge member to project from an end surface of the laminated steel sheet, and bringing a die surface of a die member into pressure contact with an end surface of the laminated steel sheet and filling a molten resin into a gap between a magnet hole and a magnet body in a state where an opening of the magnet hole is closed. A length of the bridge member is larger than a thickness of the laminated steel sheet. The die member includes a housing portion. The housing portion houses the tip of the bridge member projecting from an end surface of the laminated steel sheet.

Abstract: In a method for producing a rotor including a leak prevention hole formed in a rotor core to prevent leakage of magnetic flux from a permanent magnet; an outer-circumferential-side dovetail groove formed in an outer-circumferential-side inner wall of the leak prevention hole, an inner-circumferential-side dovetail groove formed, opposite the outer-circumferential-side dovetail groove, in an inner-circumferential-side inner wall of the leak prevention hole; and a non-magnetic bridge having both end portions engageable with the dovetail grooves, an external force is applied to bring the outer-circumferential-side inner wall close to the inner-circumferential-side inner wall, the non-magnetic bridge is inserted in the dovetail grooves while keeping the rotor core in an elastically deformed state, and, after inserting, the external force is released.

Abstract: In a rotor structure including a leak prevention hole formed in a rotor core to prevent leakage of magnetic flux from a permanent magnet; an outer-circumferential-side dovetail groove formed in an outer-circumferential-side inner wall of the leak prevention hole, an inner-circumferential-side dovetail groove formed, opposite the outer-circumferential-side dovetail groove, in an inner-circumferential-side inner wall of the leak prevention hole; and a non-magnetic bridge having both end portions engageable with the dovetail grooves. The non-magnetic bridge is formed with a chamfer at only one end face of both end faces in an axial direction of the rotor core. The non-magnetic bridge includes two or more non-magnetic bridges. The non-magnetic bridges are arranged so that the end faces formed with the chamfers are alternately located at the one end face of the rotor core.

Abstract: A manufacturing method for a laminated rotor includes inserting a bridge member into a magnetic flux leakage suppression hole, thus allowing a tip of the bridge member to project from an end surface of the laminated steel sheet, and bringing a die surface of a die member into pressure contact with an end surface of the laminated steel sheet and filling a molten resin into a gap between a magnet hole and a magnet body in a state where an opening of the magnet hole is closed. A length of the bridge member is larger than a thickness of the laminated steel sheet. The die member includes a housing portion. The housing portion houses the tip of the bridge member projecting from an end surface of the laminated steel sheet.

Abstract: In a rotor structure including a leak prevention hole formed in a rotor core to prevent leakage of magnetic flux from a permanent magnet; an outer-circumferential-side dovetail groove formed in an outer-circumferential-side inner wall of the leak prevention hole, an inner-circumferential-side dovetail groove formed, opposite the outer-circumferential-side dovetail groove, in an inner-circumferential-side inner wall of the leak prevention hole; and a non-magnetic bridge having both end portions engageable with the dovetail grooves. The non-magnetic bridge is formed with a chamfer at only one end face of both end faces in an axial direction of the rotor core. The non-magnetic bridge includes two or more non-magnetic bridges. The non-magnetic bridges are arranged so that the end faces formed with the chamfers are alternately located at the one end face of the rotor core.

Abstract: In a method for producing a rotor including a leak prevention hole formed in a rotor core to prevent leakage of magnetic flux from a permanent magnet; an outer-circumferential-side dovetail groove formed in an outer-circumferential-side inner wall of the leak prevention hole, an inner-circumferential-side dovetail groove formed, opposite the outer-circumferential-side dovetail groove, in an inner-circumferential-side inner wall of the leak prevention hole; and a non-magnetic bridge having both end portions engageable with the dovetail grooves, an external force is applied to bring the outer-circumferential-side inner wall close to the inner-circumferential-side inner wall, the non-magnetic bridge is inserted in the dovetail grooves while keeping the rotor core in an elastically deformed state, and, after inserting, the external force is released.