Title:
ROTARY ELECTRIC MACHINE
Document Type and Number:
Japanese Patent JP2021122163
Kind Code:
A
Abstract:
To provide a rotary electric machine that can suppress the demagnetization of a permanent magnet.SOLUTION: A rotor core (12) comprises: first magnet insertion holes (13a) into each of which a first permanent magnet (14a) having an arc cross section is inserted; and second magnet insertion holes (13b and 13c), extending from the inside to outside of a rotor (3) in the radial direction, into which second permanent magnets (14b and 14c), each having a rectangular cross section and extending from the inside to outside in the radial direction, are inserted. Each magnetic pole of the rotor (3) is configured of one first permanent magnet (14a) and two second permanent magnets (14b and 14c) arranged in line symmetry to the radial direction of the rotor (3). The second magnet insertion holes (13b and 13c) have air gap portions (20b and 20c) at the outside end of the rotor (3) in the radial direction.SELECTED DRAWING: Figure 4
Inventors:
TAKAHATA RYOICHI
Application Number:
JP2020014598A
Publication Date:
August 26, 2021
Filing Date:
January 31, 2020
Export Citation:
Assignee:
HITACHI METALS LTD
International Classes:
H02K1/27
Attorney, Agent or Firm:
Polaire Patent Business Corporation