Title:
A ROTOR SEGMENT FOR A ROTOR OF A PERMANENT MAGNET ELECTRICAL MACHINE
Document Type and Number:
WIPO Patent Application WO/2011/051555
Kind Code:
A3
Abstract:
Magnetic poles of a permanent magnet rotor composed of rotor segments (101- 04) are positioned in a manner that a tangential interval between magnetic axes (114, 116) of adjacent magnetic poles belonging to neighboring rotor segments (101, 104) is greater than an average of tangential intervals between magnetic axes (114, 117) of adjacent magnetic poles belonging to a same rotor segment (101). Therefore, the tangential distance from the flanks (107, 108) of the segments to closest permanent magnets can be increased and more room can be provided for arrangements (121, 122) for fastening the rotor segments together. The above-described positioning of the magnetic poles decreases the magnetic coupling between the permanent magnet rotor and the stator windings but, on the other hand, cogging may torque also be decreased.
Inventors:
KURRONEN PANU (FI)
Application Number:
PCT/FI2010/050817
Publication Date:
November 17, 2011
Filing Date:
October 20, 2010
Export Citation:
Assignee:
SWITCH DRIVE SYSTEMS OY (FI)
KURRONEN PANU (FI)
KURRONEN PANU (FI)
International Classes:
H02K1/27; H02K21/22; H02K29/03
Domestic Patent References:
| WO2008146437A1 | 2008-12-04 |
Foreign References:
| JP2007252079A | 2007-09-27 | |||
| US20090134627A1 | 2009-05-28 |
Attorney, Agent or Firm:
BERGGREN OY AB (P.O. Box 16, Helsinki, FI)
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