JP2008092702A5 - - Google Patents

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Publication number
JP2008092702A5
JP2008092702A5 JP2006271942A JP2006271942A JP2008092702A5 JP 2008092702 A5 JP2008092702 A5 JP 2008092702A5 JP 2006271942 A JP2006271942 A JP 2006271942A JP 2006271942 A JP2006271942 A JP 2006271942A JP 2008092702 A5 JP2008092702 A5 JP 2008092702A5
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Japan
Prior art keywords
ring
magnet
sintered magnet
type sintered
thickness
Prior art date
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Pending
Application number
JP2006271942A
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Japanese (ja)
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JP2008092702A (en
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Priority to JP2006271942A priority Critical patent/JP2008092702A/en
Priority claimed from JP2006271942A external-priority patent/JP2008092702A/en
Publication of JP2008092702A publication Critical patent/JP2008092702A/en
Publication of JP2008092702A5 publication Critical patent/JP2008092702A5/ja
Pending legal-status Critical Current

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Claims (13)

リング軸に垂直な断面において、リング外周は円形状に形成されるとともに、リング内周はその周方向に凹部及び凸部が周期的に形成され、
リング周方向にN極及びS極の磁極が交互に形成されており、上記磁極の境界が磁石厚さの薄い上記凹部の領域に形成され、上記凹部の領域は、周方向所定の長さにわたり、磁石厚さが略一定であることを特徴とするリング型焼結磁石。
In the cross section perpendicular to the ring axis, the outer periphery of the ring is formed in a circular shape, and the inner periphery of the ring is periodically formed with recesses and protrusions in the circumferential direction,
N-pole and S-pole magnetic poles are alternately formed in the circumferential direction of the ring, and the boundary between the magnetic poles is formed in the concave portion having a thin magnet thickness . The concave portion extends over a predetermined length in the circumferential direction. A ring-type sintered magnet characterized in that the magnet thickness is substantially constant .
磁石厚さの厚い上記凸部の領域において、リング内周が凸状の曲線により形成され、磁極の中心が上記凸部の最大磁石厚さ部分に配置されていることを特徴とする請求項1に記載のリング型焼結磁石。 In the region of the thick the convex portion of the magnet thickness, ring inner periphery is formed by convex curve, claims center of the magnetic pole is characterized in that it is arranged in the maximum magnet thickness portion of the convex portion 1 The ring-type sintered magnet described in 1. 磁石の厚さの厚い上記凸部の領域において、磁石厚さが次式のLm(θ)に従うことを特徴とする請求項2に記載のリング型焼結磁石。
Lm(θ)≒a/(1/(k・sinθ)−1)
ここで、Lm(θ):リング型焼結磁石の中心と、凹部の周方向略中心位置とを結ぶ を基準とした回転角度θにおける磁石厚さ
a:磁石の最大厚さに対する磁石外周とステータ間のエアギャップの間隔
k:磁石厚さ最大の領域での、磁束量と起磁力の比例定数
k=Lm max・vm/((Lm max+a)/μ0)
Lm max:磁石最大厚さ
vm:磁石の単位長さあたりの起磁力
μ0:透磁率
3. The ring-type sintered magnet according to claim 2 , wherein the magnet thickness conforms to the following formula Lm (θ) in the region of the convex portion where the magnet is thick.
Lm (θ) ≈a / (1 / (k · sin θ) −1)
Here, Lm (θ): magnet thickness at a rotation angle θ with reference to a line connecting the center of the ring-type sintered magnet and the substantially center position in the circumferential direction of the recess.
a: Spacing of the air gap between the magnet outer circumference and the stator with respect to the maximum magnet thickness
k: Proportional constant between the amount of magnetic flux and magnetomotive force in the maximum magnet thickness region
k = Lm max · vm / ((Lm max + a) / μ0)
Lm max: Maximum magnet thickness
vm: Magnetomotive force per unit length of magnet
μ0: Permeability
磁石厚さの厚い上記凸部の領域において、リング内周が凸角形状に形成され、磁極の中心が上記凸部の最大磁石厚さ部分に配置されていることを特徴とする請求項1に記載のリング型焼結磁石。 In the region of the thick the convex portion of the magnet thickness, ring inner periphery is formed in a convex angle shape in claim 1 in which the center of the magnetic pole is characterized in that it is arranged in the maximum magnet thickness portion of the convex portion The ring-type sintered magnet described. リング軸に垂直な断面において、リング外周は円形状に形成されるとともに、リング内周はその周方向にS字曲線状の凸部及び凹部が周期的に形成され、リング周方向にN極及びS極の磁極が交互に形成されており、上記磁極の境界が磁石厚さの薄い上記凹部の領域に形成されており、磁石厚さが連続的に変化したリング型焼結磁石。 In the cross section perpendicular to the ring axis, the outer periphery of the ring is formed in a circular shape, and the inner periphery of the ring is periodically formed with S-curved convex portions and concave portions in the circumferential direction, and N poles and A ring-type sintered magnet in which the magnetic poles of S poles are alternately formed, the boundary of the magnetic poles is formed in the region of the recess having a thin magnet thickness, and the magnet thickness is continuously changed . リング軸に垂直な断面において、リング外周は円形状に形成されるとともに、リング内周はその周方向に2次曲線状の凸部及び凹部が周期的に形成され、リング周方向にN極及びS極の磁極が交互に形成されており、上記磁極の境界が磁石厚さの薄い上記凹部の領域に形成されており、上記凹部は上記2次曲線の交わる部分で形成されたものであるリング型焼結磁石。 In the cross section perpendicular to the ring axis, the outer periphery of the ring is formed in a circular shape, and the inner periphery of the ring is periodically formed with convex and concave portions of a quadratic curve in the circumferential direction, and the N pole and A ring in which S poles are alternately formed, a boundary between the poles is formed in a region of the recess having a small magnet thickness, and the recess is formed at a portion where the quadratic curve intersects. Mold sintered magnet. 磁石の厚さが薄い上記凹部の領域において、磁極の境界がリング軸方向に傾斜して形成されていることを特徴とする請求項1に記載のリング型焼結磁石。 2. The ring-type sintered magnet according to claim 1 , wherein the boundary of the magnetic pole is formed to be inclined in the ring axis direction in the region of the concave portion where the magnet is thin. 磁極の境界が、リング軸方向にS字状に傾斜して形成されていることを特徴とする請求項7に記載のリング型焼結磁石。 The ring-type sintered magnet according to claim 7 , wherein the boundary of the magnetic pole is formed to be inclined in an S shape in the ring axis direction. 請求項1から請求項8のいずれか1項に記載のリング型焼結磁石と、上記リング型焼結磁石の内周の上記凹部及び凸部に概ね沿うような凸部及び凹部がその外周に形成され、上記リング型焼結磁石の内周部に固定される鉄心と、上記鉄心が固定されたシャフトとから構成されるロータ。 The ring-type sintered magnet according to any one of claims 1 to 8 , and a convex portion and a concave portion that are substantially along the concave portion and the convex portion of the inner periphery of the ring-type sintered magnet. A rotor formed of an iron core formed and fixed to an inner peripheral portion of the ring-type sintered magnet, and a shaft to which the iron core is fixed. 上記リング焼結磁石の磁石厚さの薄い凹部の領域における上記鉄心とのギャップを、上記リング焼結磁石の磁石厚さの厚い凸部の領域における上記鉄心とのギャップより、広くしたことを特徴とする請求項9に記載のロータ。 The gap between the ring sintered magnet and the iron core in the thin concave region is wider than the gap between the ring sintered magnet and the thick core. The rotor according to claim 9 . 上記リング型焼結磁石の磁石厚さが薄い凹部の領域に対応する位置の上記鉄心に凹部を設けたことを特徴とする請求項9に記載のロータ。 The rotor according to claim 9 , wherein a concave portion is provided in the iron core at a position corresponding to a concave region where the magnet thickness of the ring-type sintered magnet is thin. 上記鉄心の凹部が、リング軸方向に対して傾斜して形成されていることを特徴とする請求項11に記載のロータ。 The rotor according to claim 11 , wherein the concave portion of the iron core is formed to be inclined with respect to the ring axis direction. 請求項9から請求項12のいずれか1項に記載のロータと、上記ロータの外周に配置されたステータを備え、上記ロータが上記ステータに対して回転可能に支持されている回転機。 A rotating machine comprising: the rotor according to any one of claims 9 to 12 ; and a stator disposed on an outer periphery of the rotor, wherein the rotor is rotatably supported with respect to the stator.
JP2006271942A 2006-10-03 2006-10-03 Ring-type sintered magnet, rotor, and dynamo-electric machine Pending JP2008092702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006271942A JP2008092702A (en) 2006-10-03 2006-10-03 Ring-type sintered magnet, rotor, and dynamo-electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006271942A JP2008092702A (en) 2006-10-03 2006-10-03 Ring-type sintered magnet, rotor, and dynamo-electric machine

Publications (2)

Publication Number Publication Date
JP2008092702A JP2008092702A (en) 2008-04-17
JP2008092702A5 true JP2008092702A5 (en) 2009-01-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012010571A (en) * 2010-05-28 2012-01-12 Nisca Corp Magnet rotor for rotary electric machine, manufacturing method of the same, and inner rotor type motor
CN103368293A (en) * 2012-03-26 2013-10-23 珠海格力电器股份有限公司 Motor rotor structure and motor with same
DE102013206787A1 (en) * 2013-04-16 2014-10-16 Efficient Energy Gmbh Rotor and method of manufacturing a rotor
CN103904851A (en) * 2014-03-28 2014-07-02 湖北立锐机电有限公司 Magnetic ring structure, shaft and permanent magnet synchronous motor with magnetic ring structure and shaft
CN108565993A (en) * 2018-06-11 2018-09-21 成都银河磁体股份有限公司 A kind of magnet

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0576147A (en) * 1991-09-10 1993-03-26 Fuji Elelctrochem Co Ltd Rotor for motor
JPH07222385A (en) * 1994-01-31 1995-08-18 Fuji Electric Co Ltd Reverse salient cylindrical magnet synchronous motor
JPH0956092A (en) * 1995-08-10 1997-02-25 Daido Steel Co Ltd Permanent-magnet rotor
JPH11308795A (en) * 1998-04-20 1999-11-05 Mitsubishi Electric Corp Permanent magnet type synchronous motor
JP2004248378A (en) * 2003-02-12 2004-09-02 Toyoda Mach Works Ltd Ring magnet, rotating electric machine with this ring magnet, and rotor for rotating electric machine
EP1648073B1 (en) * 2003-07-22 2018-11-07 Aichi Steel Corporation Ltd. Thin hybrid magnetization type ring magnet, yoke-equipped thin hybrid magnetization type ring magnet, and brush-less motor
JP2006230099A (en) * 2005-02-17 2006-08-31 Mitsubishi Electric Corp Ring magnet and apparatus and method for manufacturing ring magnet

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