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US 2017/0257010 A1Published application
Laminated core, vr type resolver and production method for laminated core
AssigneeMinebea Co., Ltd.
InventorTakaaki OCHIAI
Life of this patent
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Abstract
A production method for a rotor core for a VR type resolver has a structure in which one protrusion is formed on an inner edge thereof in which the rotor cores can be rotated and laminated without increasing cost. In a production method of a rotor core for a VR type resolver, a plurality of tabular rotor core pieces are laminated. In this case, in the rotor core pieces, four protrusions are simultaneously formed, one of them is left, the remainder thereof is removed, and rotating lamination is carried out.
Claims8
A production method of a rotor core, comprising
- a step for forming one protrusion at each inner edges of a plurality of tubular members, and
- a step for forming concavities at inner each the edges of the tubular members,
- a step for laminating the tabular members in an axis direction, wherein
- a rotor core comprises the tabular members, wherein
- the tabular members include the inner edges,
- the one protrusion and the concavities are arranged at the inner edges of the tabular members in a radial direction and arranged with a predetermined interval in a circumferential direction.
3 more elements
A rotor core comprising:
- a plurality of tabular members including an inner edge, wherein
- the tabular members are laminated, in an axis direction and
- one protrusion and a plurality of concavities are arranged inside each of the inner edges of the tabular members in a radial direction, and arranged with a predetermined interval in a circumferential direction.
Dependencies are inferred from the claim text.