IPM rotor

1. An IPM rotor, which includes a plurality of core sheets each having a hole portion configured to accommodate magnets and being laminated on one another, the magnets being inserted in the hole portions, the IPM rotor comprising:

a first core sheet of the plurality of laminated core sheets having a spring plate portion provided to an edge of a first hole portion of the first core sheet; and

a second core sheet of the plurality of laminated core sheets having a recessed portion provided to the edge of a second hole portion of the second core sheet,

wherein at least one of the plurality of laminated core sheets has a first protruding portion and a second protruding portion provided to the edge of the hole portion of the at least one of the plurality of laminated core sheets, and

wherein a distance between the first protruding portion and the second protruding portion is greater than a length of a long side of the accommodated magnet.

2. The IPM rotor according to claim 1 , wherein the first protruding portion and the second protruding portion are provided to the edge of the first hole portion of the first core sheet.

3. The IPM rotor according to claim 1 , wherein the first protruding portion and the second protruding portion are provided to the edge of the second hole portion of the second core sheet.

4. The IPM rotor according to claim 1 , further comprising a third core sheet, wherein the first protruding portion and the second protruding portion are arranged in the third core sheet.

5. The IPM rotor according to claim 4 , further comprising a base core sheet only having the hole portion,

wherein the IPM rotor includes portions at which at least the one third core sheet, at least the one base core sheet, the first core sheet, and at least the one second core sheet are laminated in the stated order.

6. The IPM rotor according to claim 1 ,

wherein the second core sheet is continuously laminated on the first core sheet,

wherein the spring plate portion is bent from a contact end portion between the spring plate portion of the first core sheet and the recessed portion of the second core sheet,

wherein the second core sheet laminated successively has a thickness of equal to or more than a length of the spring plate portion, and

wherein the length of the spring plate portion is one time or more to ten times or less the thickness of the second core sheet.

7. The IPM rotor according to claim 1 , wherein the width of the spring plate portion is one time or more to ten times or less the thickness of the first core sheet.

8. The IPM rotor according to claim 1 ,

wherein the magnet has a substantially rectangular parallelepiped shape,

wherein the hole portion of each of the plurality of laminated core sheets is formed to have a V-shape which is open toward a radially outer side of the core sheet,

wherein the first protruding portion and the second protruding portion are provided on outer sides of a short side of the magnet, and

wherein the spring plate portion is provided on the edge of the first hole portion on a radially inner side of the first hole portion, and is provided at an end portion of a long side of the magnet.

9. The IPM rotor according to claim 1 ,

wherein the magnet has a substantially rectangular parallelepiped shape,

wherein the hole portion of each of the plurality of laminated core sheets extends in a circumferential direction of the core sheet,

wherein the first protruding portion and the second protruding portion are provided on outer sides of a short side of the magnet, and

wherein the spring plate portion is provided on the edge of the first hole portion on a radially inner side of the first hole portion, and is formed at an center portion of a long side of the magnet.

10. The IPM rotor according to claim 1 , wherein the spring plate portion is provided at an end portion of the long side of the magnet in a longitudinal direction of the magnet.