WE CLAIM:
[Claim 1] An IPM rotor, which includes a plurality of core sheets having hole portions 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 having a spring plate portion provided to the hole portion, and;
a second core sheet having a recessed portion provided to the hole portion,
wherein at least one of the plurality of the laminated core sheets has a protruding portion provided to the hole portion.
[Claim 2] The IPM rotor according to claim 1, wherein the protruding portion is provided to the hole portion of the first core sheet.
[Claim 3] The IPM rotor according to claim 1, wherein the protruding portion is provided to the hole portion of the second core sheet.
[Claim 4] The IPM rotor according to claim 1, further comprising a third core sheet, wherein the protruding portion is arranged in the third core sheet.
[Claim 5] The IPM motor according to claim 4, further comprising a base core sheet only having the hole portion,
wherein the IPM motor includes portions at which at least the
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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.
[Claim 6] The IPM motor according to any one of claims 1 to 5,
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.
[Claim 7] The IPM motor according to any one of claims 1 to 6, 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.
[Claim 8] The IPM motor according to any one of claims 1 to 7, wherein the magnet has a substantially rectangular
parallelepiped shape,
wherein the hole portion is formed to have a V-shape which
is open toward a radially outer side of the core sheet,
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wherein the protruding portion is provided on an outer side of the short side of the magnet, and
wherein the spring plate portion is a surface on a radially inner side of the hole portion, and is provided at an end portion of a long side of the magnet.
[Claim 9] The IPM motor according to any one of claims 1 to 7,
wherein the magnet has a substantially rectangular parallelepiped shape,
wherein the hole portion is formed in an arc direction of the core sheet,
wherein the protruding portion is provided on an outer side of the short side of the magnet, and
wherein the spring plate portion is a surface on a radially inner side of the hole portion, and is formed at an center portion of a long side of the magnet.
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