EP 0795229 A1 19970917 - COMMUTATORLESS POLYPHASE AC ELECTRIC MACHINE
Title (en)
COMMUTATORLESS POLYPHASE AC ELECTRIC MACHINE
Title (de)
BURSTENLOSEN MEHRPHASIGEN WECHSELSTROMMOTOR
Title (fr)
MACHINE ELECTRIQUE A COURANT ALTERNATIF POLYPHASE SANS COLLECTEUR
Publication
Application
Priority
- CA 9500651 W 19951115
- US 35324194 A 19941202
Abstract (en)
[origin: WO9617429A1] A commutatorless polyphase AC electric machine including a rotor core with a surface having alternating parallel projections and slots. Each slot has an opening at the stator surface which is substantially as wide as the widest portion of the corresponding slot. The machine further includes a rotor core with a surface provided with magnets having respective surface sections facing the slots and projections. All the surface sections of the magnets generate a magnetic flux density with an average amplitude component Br( THETA ) that is perpendicular to the corresponding stator surface and substantially defined by equation (I), wherein La( THETA ) is defined by equation (II), where theta is an angular position in radians relative to a reference position on the rotor core; Br( theta ) is an average amplitude component in angular position theta ; Lv( theta ) is the spacing between the projections and the rotor core surface in angular position theta ; Mr( theta ) is a residual magnet induction component in angular position theta , Mr( theta ) being perpendicular to the corresponding stator surface and alternating with a period corresponding to 4 pi /K; K is an even number representing all the surface sections; and C is an arbitrary constant. A method for operating said commutatorless polyphase AC electric machine is also disclosed.
IPC 1-7
IPC 8 full level
H02K 21/22 (2006.01); H02K 1/27 (2006.01); H02K 21/12 (2006.01); H02K 29/03 (2006.01)
CPC (source: EP US)
H02K 1/165 (2013.01 - EP US); H02K 1/27915 (2022.01 - EP US); H02K 21/12 (2013.01 - EP US); H02K 29/03 (2013.01 - EP US)
Citation (search report)
See references of WO 9617429A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9617429 A1 19960606; AR 000493 A1 19970710; AU 3865695 A 19960619; BR 9508702 A 19970812; CA 2191128 A1 19960606; CN 1157675 A 19970820; EP 0795229 A1 19970917; JP H11500897 A 19990119; MX 9700858 A 19970430; TR 199501515 A2 19960721; TW 280964 B 19960711; US 5753991 A 19980519
DOCDB simple family (application)
CA 9500651 W 19951115; AR 33440895 A 19951128; AU 3865695 A 19951115; BR 9508702 A 19951115; CA 2191128 A 19951115; CN 95194993 A 19951115; EP 95937737 A 19951115; JP 51797496 A 19951115; MX 9700858 A 19951115; TR 9501515 A 19951130; TW 84111781 A 19951107; US 35324194 A 19941202