Disclosed are a punching piece of a permanent magnet motor rotor for a vehicle and a rotor skewing structure thereof. The punching piece of the rotor includes an inner punching piece and an outer punching piece, a center of the inner punching piece is provided with a mounting hole for fixedly installing a rotating shaft, a side wall of the mounting hole is provided with a plurality of rotating shaft matching keyways evenly distributed in a circumferential direction, and the rotating shaft is provided with at least one rotating shaft matching key extending along an axial direction of the rotating shaft, the at least one rotating shaft matching key is in interference fit with the rotating shaft matching keyway, a plurality of matching keys are provided at an outer wall of the inner punching piece, inner wall matching keyways are provided at an inner wall of the outer punching piece correspondingly.

Disclosed are a punching piece of a permanent magnet motor rotor for a vehicle and a rotor skewing structure thereof. The punching piece of the rotor includes an inner punching piece and an outer punching piece, a center of the inner punching piece is provided with a mounting hole for fixedly installing a rotating shaft, a side wall of the mounting hole is provided with a plurality of rotating shaft matching keyways evenly distributed in a circumferential direction, and the rotating shaft is provided with at least one rotating shaft matching key extending along an axial direction of the rotating shaft, the at least one rotating shaft matching key is in interference fit with the rotating shaft matching keyway, a plurality of matching keys are provided at an outer wall of the inner punching piece, inner wall matching keyways are provided at an inner wall of the outer punching piece correspondingly.

A method of manufacturing a polar anisotropic magnet includes manufacturing polar anisotropic magnets 1N, 1S having four surfaces SF1, SF2, SF3. The method includes: an in-field molding step S20 for performing molding in a magnetic field while applying a magnetic field in a first direction of one effective surface VSF (SF1) among the four surfaces and applying a magnetic field in a second direction to the remaining three surfaces (SF2, SF3, SF4); and a four-way magnetization step S40 for performing magnetization by applying a magnetic field in the first direction to the effective surface VSF (SF1) and by applying a magnetic field in the second direction to the remaining three surfaces (SF2, SF3, SF4). The present invention provides a method of manufacturing a polar anisotropic magnet and a method of manufacturing a magnet assembly that have a higher degree of freedom in designing and are more economical than other approaches.

A method of manufacturing a polar anisotropic magnet includes manufacturing polar anisotropic magnets 1N, 1S having four surfaces SF1, SF2, SF3. The method includes: an in-field molding step S20 for performing molding in a magnetic field while applying a magnetic field in a first direction of one effective surface VSF (SF1) among the four surfaces and applying a magnetic field in a second direction to the remaining three surfaces (SF2, SF3, SF4); and a four-way magnetization step S40 for performing magnetization by applying a magnetic field in the first direction to the effective surface VSF (SF1) and by applying a magnetic field in the second direction to the remaining three surfaces (SF2, SF3, SF4). The present invention provides a method of manufacturing a polar anisotropic magnet and a method of manufacturing a magnet assembly that have a higher degree of freedom in designing and are more economical than other approaches.

A motor core assembly and a manufacturing method for the motor core assembly include a permanent magnet inside a motor that may be recovered, in its original state without damage and at a low cost, from a motor to be disposed of together with a device when the device to which the motor is applied is disposed of in a state in which the permanent magnet wrapped with an injection part is inserted into a rotor core. Accordingly, the number of manufacturing processes and the cost may be reduced.

A motor core assembly and a manufacturing method for the motor core assembly include a permanent magnet inside a motor that may be recovered, in its original state without damage and at a low cost, from a motor to be disposed of together with a device when the device to which the motor is applied is disposed of in a state in which the permanent magnet wrapped with an injection part is inserted into a rotor core. Accordingly, the number of manufacturing processes and the cost may be reduced.

A permanent magnet for a permanent magnet machine, a permanent magnet machine, a method for manufacturing a permanent magnet for a permanent magnet machine, and a method for manufacturing a permanent magnet machine is provided. The permanent magnet includes a base body, and at least one first fixing protrusion for fixing the base body to a rotor of the permanent magnet machine, wherein the first fixing protrusion extends from a first side of the base body, and wherein the base body and the at least one first fixing protrusion are formed integrally as one-piece.

A permanent magnet for a permanent magnet machine, a permanent magnet machine, a method for manufacturing a permanent magnet for a permanent magnet machine, and a method for manufacturing a permanent magnet machine is provided. The permanent magnet includes a base body, and at least one first fixing protrusion for fixing the base body to a rotor of the permanent magnet machine, wherein the first fixing protrusion extends from a first side of the base body, and wherein the base body and the at least one first fixing protrusion are formed integrally as one-piece.

A rotor for a rotary electric machine includes a rotor core in which a plurality of magnetic pole portions is provided. Each of the magnetic pole portions includes: a magnet insertion hole into which a permanent magnet is inserted. A d-axis-side space portion is provided inside the magnet insertion hole between the d-axis-side end portion of the permanent magnet and the d-axis-side end portion of the magnet insertion hole, and a q-axis-side space portion penetrating in the axial direction is provided inside the magnet insertion hole between the q-axis-side end portion of the permanent magnet and the q-axis-side end portion of the magnet insertion hole. The permanent magnet further includes: a first communication portion communicating the d-axis-side end portion with the q-axis-side end portion; and a second communication portion communicating the d-axis-side end portion with the q-axis-side end portion.

A rotor for a rotary electric machine includes a rotor core in which a plurality of magnetic pole portions is provided. Each of the magnetic pole portions includes: a magnet insertion hole into which a permanent magnet is inserted. A d-axis-side space portion is provided inside the magnet insertion hole between the d-axis-side end portion of the permanent magnet and the d-axis-side end portion of the magnet insertion hole, and a q-axis-side space portion penetrating in the axial direction is provided inside the magnet insertion hole between the q-axis-side end portion of the permanent magnet and the q-axis-side end portion of the magnet insertion hole. The permanent magnet further includes: a first communication portion communicating the d-axis-side end portion with the q-axis-side end portion; and a second communication portion communicating the d-axis-side end portion with the q-axis-side end portion.