Title:
ARMATURE CORE OF ELECTRIC MOTOR
Document Type and Number:
Japanese Patent JP2002305862
Kind Code:
A
Abstract:
To prevent frictional torque from being fluctuated by synchronization of knurl portions 6a where magnetic strain is produced with permanent magnets 3 where magnetic flux varies when, in the armature core 4 of an electric motor for electric power steering, whirl stop for the armature core 4 against a core shaft 6 is implemented by fitting the knurls 6a formed on the core shaft 6 into grooves 4b formed in the armature core 4.
If there are four permanent magnets 3, the three knurls 6a are formed at equal pitch angles of 120° to prevent the above-mentioned synchronization.
Inventors:
IIJIMA MASAKI
ABE HIDEAKI
ABE HIDEAKI
Application Number:
JP2001101117A
Publication Date:
October 18, 2002
Filing Date:
March 30, 2001
Export Citation:
Assignee:
MITSUBA CORP
International Classes:
H02K1/28; H02K23/40; (IPC1-7): H02K23/40; H02K1/28
Attorney, Agent or Firm:
Tetsuo Hirose