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EP0134458A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Stator for a magnet motor

Assignee: Mitsubishi Electric Corp
•
Filing: 1984-06-28
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Granted: —
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Expires: 2004-06-28
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Abstract

Abstract A stator for a magnetic motor comprising a cylindrical yoke (2), at least one pair of main magnetic poles (14) formed of permanent magnets fixed to the inner peripheral surface of the yoke (2), at least one pair of auxiliary magnetic poles (15) made of a soft iron material each placed at a side portion of each of the main magnetic poles (14), wherein an air gap (rm) between the inner peripheral surface of each of the main magnetic poles (14) and the outer peripheral surface of an armature (6) rotatably arranged in the axial center of the yoke (2) is greater than an air gap (rp) between the inner peripheral surface of each of the auxiliary magnetic poles (15) and the outer peripheral surface of the armature (6).

Inventors

  • 👤 Akira Morishita
  • 👤 Kyoichi Okamoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 13:17
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/02; H02K23/04

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 129 words
A stator for a magnetic motor comprising a cylindrical yoke (2), at least one pair of main magnetic poles (14) formed of permanent magnets fixed to the inner peripheral surface of said yoke, at least one pair of auxiliary magnetic poles (15) made of a soft iron material each placed at a side portion of each of said main magnetic poles, characterized in that an air gap (rm) between the inner peripheral surface of each of said main magnetic poles (14) and the outer peripheral surface of an armature (6) rotatably arranged in the axial center of said yoke (2) is greater than an air gap (rp) between the inner peripheral surface of each of said auxiliary magnetic poles (15) and the outer peripheral surface of said armature (6).
Claim 2
Dependent Claim 129 words
A stator for a magnetic motor comprising a cylindrical yoke (2), at least one pair of main magnetic poles (14) formed of permanent magnets fixed to the inner peripheral surface of said yoke, at least one pair of auxiliary magnetic poles (15) made of a soft iron material each placed at a side portion of each of said main magnetic poles, characterized in that an air gap (rm) between the inner peripheral surface of each of said main magnetic poles (14) and the outer peripheral surface of an armature (6) rotatably arranged in the axial center of said yoke (2) is greater than an air gap (rp) between the inner peripheral surface of each of said auxiliary magnetic poles (15) and the outer peripheral surface of said armature (6).
Claim 3
Dependent Claim 21 words
The stator according to Claim 1, characterized in that said main magnetic poles (14) are constituted by ferritic permanent magnet material.
Claim 4
Dependent Claim 69 words
The stator according to Claim 1 or 2, characterized in that said air gap (rm) between the inner peripheral surface of said main magnetic pole (14) and the outer peripheral surface of said armature (6) and said air gap (rp) between the inner peripheral surface of said auxiliary magnetic pole (15) and the outer peripheral surface of said armature (6) follow the relationship rm - rp ≤ 0,3 mm.
Claim 5
Dependent Claim 45 words
The stator according to one of the preceeding Claims, characterized in that each of said auxiliary magnetic poles (15) is placed at the rear end side of each of said main magnetic poles (14) with respect to the direction of revolution of said armature (6).

References Cited (Backward Citations)

GB1277876A Cited
FR2268377A1 Cited
EP0096868A1 Cited

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