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1. WO2021039763 - MOTOR, DRIVE SYSTEM, CLEANER, UNMANNED AERIAL VEHICLE, AND ELECTRIC AIRCRAFT

Publication Number WO/2021/039763
Publication Date 04.03.2021
International Application No. PCT/JP2020/031958
International Filing Date 25.08.2020
IPC
H02K 1/27 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
1Details of the magnetic circuit
06characterised by the shape, form or construction
22Rotating parts of the magnetic circuit
27Rotor cores with permanent magnets
B22F 3/00 2021.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
B22F 3/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
24After-treatment of workpieces or articles
C22C 28/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
28Alloys based on a metal not provided for in groups C22C5/-C22C27/103
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
H01F 1/057 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
047Alloys characterised by their composition
053containing rare earth metals
055and magnetic transition metals, e.g. SmCo5
057and IIIa elements, e.g. Nd2Fe14B
CPC
B22F 3/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
B22F 3/24
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
24After-treatment of workpieces or articles
C22C 28/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
28Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
H01F 1/057
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
047Alloys characterised by their composition
053containing rare earth metals
055and magnetic transition metals, e.g. SmCo5
057and IIIa elements, e.g. Nd2Fe14B
H02K 1/17
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
1Details of the magnetic circuit
06characterised by the shape, form or construction
12Stationary parts of the magnetic circuit
17Stator cores with permanent magnets
Applicants
  • 日本電産株式会社 NIDEC CORPORATION [JP]/[JP]
Inventors
  • 福▲崎▼ 智数 FUKUZAKI, Tomokazu
  • 吉田 昇平 YOSHIDA, Shohei
  • 田村 隆治 TAMURA, Ryuji
Priority Data
2019-15370426.08.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) MOTOR, DRIVE SYSTEM, CLEANER, UNMANNED AERIAL VEHICLE, AND ELECTRIC AIRCRAFT
(FR) MOTEUR, SYSTÈME D'ENTRAÎNEMENT, DISPOSITIF DE NETTOYAGE, VÉHICULE AÉRIEN SANS PILOTE ET AÉRONEF ÉLECTRIQUE
(JA) モータ、駆動システム、掃除機、無人飛行体、電動航空機
Abstract
(EN)
This motor comprises a stator and a rotor capable of rotating around the central axis of the stator. The rotor or stator comprises a neodymium magnet. The neodymium magnet has a material structure including a main phase having a composition represented by Nd-Fe-B and a grain boundary phase having a higher Nd concentration than the main phase. The grain boundary phase essentially comprises an alloy of Nd and an additive element M1. The additive element M1 is an element other than Fe and B. The electrical resistivity of the neodymium magnet is greater than or equal to 1.5 μΩm.
(FR)
L'invention concerne un moteur qui comprend un stator et un rotor apte à tourner autour de l'axe central du stator. Le rotor ou le stator comprend un aimant au néodyme. L'aimant au néodyme présente une structure de matériau qui comprend une phase principale ayant une composition représentée par Nd-Fe-B et une phase de limite de grain ayant une concentration en Nd supérieure à celle de la phase principale. La phase de limite de grain comprend essentiellement un alliage de Nd et un élément additif M1. L'élément additif M1 est un élément autre que Fe et B. La résistivité électrique de l'aimant au néodyme est supérieure ou égale à 1,5 μΩm.
(JA)
ステータと、ステータに対して中心軸回りに回転可能なロータとを備え、ロータまたはステータにネオジム磁石を備えるモータであって、ネオジム磁石は、組成式:Nd-Fe-Bで表される組成を有する主相と、主相よりも高いNd濃度を有する粒界相とを含む材料組織を有し、粒界相は、実質的に、Ndと添加元素M1との合金からなり、添加元素M1は、FeおよびB以外の元素であり、ネオジム磁石の電気抵抗率が1.5[μΩm]以上である、モータ。
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