EP 0303703 A4 19890621 - ROTOR STRUCTURE OF MOTOR HAVING PERMANENT MAGNET.
Title (en)
ROTOR STRUCTURE OF MOTOR HAVING PERMANENT MAGNET.
Title (de)
ROTOR EINES MOTORS MIT DAUERMAGNET.
Title (fr)
ROTOR DE MOTEUR A AIMANT PERMANENT.
Publication
Application
Priority
JP 3156087 A 19870216
Abstract (en)
[origin: WO8806374A1] Rotor structure of a motor. Yokes (13) each equipped with a permanent magnet (14) fixed to its outer circumference are disposed and fixed around the outer circumference of a rotor core (12) with predetermined gaps between them in such a manner as to form recesses (20) between the yokes (13). The air layer of this recess (20) act as a large magnetic resistance to a main path (24) of the magnetic flux generated from the side of a stator (30). Therefore, the drop in permeability ($g(m)) of each of the rotor core (12), the yoke (13) and the stator core (36) can be restricted and the output torque of the motor can be increased while minimizing the magnetic resistance in the main path (22) of the main magnetic flux generated from the permanent magnet (14).
IPC 1-7
IPC 8 full level
B30B 15/30 (2006.01); B65H 7/12 (2006.01); H02K 1/27 (2006.01)
CPC (source: EP KR US)
B30B 15/30 (2013.01 - KR); B65H 7/12 (2013.01 - EP KR US)
Citation (search report)
- [XP] EP 0212552 A2 19870304 - KOLLMORGEN TECH CORP [US]
- [X] DE 1060028 B 19590625 - ERNST MASSAR DR ING
- [A] FR 2538182 A1 19840622 - KOLLMORGEN TECH CORP [US]
- [A] EP 0193611 A1 19860910 - FANUC LTD [JP]
- See references of WO 8806374A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8806374 A1 19880825; EP 0303703 A1 19890222; EP 0303703 A4 19890621; JP S63202247 A 19880822; KR 880701178 A 19880726; KR 930007668 B1 19930818
DOCDB simple family (application)
JP 8800150 W 19880216; EP 88901645 A 19880216; JP 3156087 A 19870216; KR 870701021 A 19871106