Motor structure

• US 6,043,583 A
• Filed: 09/04/1998
• Issued: 03/28/2000
• Est. Priority Date: 09/08/1997
• Status: Expired due to Fees

• Current Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Original Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Inventors: Kurosawa, Souichi, Matsuda, Atsunori
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): Ghahramani, Saeed
• Application Number:
  US09/148,329
• Time in Patent Office: 571 Days
• Field of Search: 310/254, 310/259, 310/256, 310/43, 310/42, 310/216, 310/217, 310/258, 310/45, 310/67 R, 29/596
• US Class Current: 310/254.1
• CPC Class Codes: H02K 1/146 consisting of a generally annular yoke with salient poles
• CPC Class Codes: H02K 2201/09 Magnetic cores comprising laminations characterised by being fastened by caulking

Abstract

A motor structure having a laminated stack made of soft magnetic plates, a plurality of laminated constituting stator magnetic pole portions and a yoke portion, between each plate is an insulative bonding material, so that the plates are insulated from, and kept in tight contact with, each other. A synthetic resin layer surrounds and tightly binds the lamination stack.

Claims

1. A motor structure, comprising:

a laminated stack formed of a plurality of laminated soft magnetic shin plates which serve as the stator magnetic poles and yoke, wherein the soft magnetic plates are glued and pressed together, but insulated from each other, via an insulative bonding material between adjacent plates, and a synthetic resin layer surrounds and bonds the laminated soft magnetic shin plates of said lamination stack tightly.

2. A motor structure according to claim 1, wherein said motor structure is an outer rotor type motor structure.

3. A motor structure according to claim 1, wherein said motor structure is an inner rotor type motor structure.

4. A motor structure according to claim 1, wherein said motor structure is enclosed by a case.

5. A motor structure according to claim 4, wherein said case is made of pressed soft magnetic metallic plate.