EP 1540794 A2 20050615 - PERMANENT MAGNET MACHINE
Title (en)
PERMANENT MAGNET MACHINE
Title (de)
PERMANENTMAGNETMASCHINE
Title (fr)
MACHINE A AIMANTS PERMANENTS
Publication
Application
Priority
- US 0327162 W 20030827
- US 22950602 A 20020828
- US 22971902 A 20020828
Abstract (en)
[origin: WO2004021551A2] A machine includes a rotor defining at least two adjacent magnet retention slots and a plurality of interior permanent magnets. The rotor's radial thickness above a magnet retention slot transitions from a first thickness to a bridge region having a lesser, second thickness. The transition occurs within a defined angular expanse. Low permeability areas are positioned below the bridge region between the magnets. There are no direct linear paths between the ends of the magnets and no direct linear paths that extend radially from the outer rotor portion to the interior of the rotor, between the magnets, that do not pass through a low permeability area. A machine includes a stator defining stator poles, a rotor with interior permanent magnets. In one embodiment, at least two impedance reduction slits are positioned radially outward of the magnets, and at least a portion of each slit is within a defined region.
IPC 1-7
IPC 8 full level
H02K 1/27 (2006.01); H02K 21/16 (2006.01)
CPC (source: EP)
H02K 1/276 (2013.01); H02K 21/16 (2013.01)
Citation (search report)
See references of WO 2004021551A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004021551 A2 20040311; WO 2004021551 A3 20040701; AU 2003278743 A1 20040319; AU 2003278743 A8 20040319; EP 1540794 A2 20050615
DOCDB simple family (application)
US 0327162 W 20030827; AU 2003278743 A 20030827; EP 03770267 A 20030827