US 12,080,458 B2
Magnetic composite material and rotating electric machine
Tomohiro Suetsuna, Kawasaki (JP); Hiroaki Kinouchi, Shinagawa (JP); and Takahiro Kawamoto, Kawasaki (JP)
Assigned to Kabushiki Kaisha Toshiba, Minato-ku (JP)
Filed by Kabushiki Kaisha Toshiba, Minato-ku (JP)
Filed on Mar. 4, 2019, as Appl. No. 16/291,100.
Claims priority of application No. 2018-170946 (JP), filed on Sep. 12, 2018.
Prior Publication US 2020/0082963 A1, Mar. 12, 2020
Int. Cl. H01F 1/24 (2006.01); B22F 1/068 (2022.01); B22F 1/08 (2022.01); B22F 1/102 (2022.01); B22F 1/16 (2022.01); B22F 3/02 (2006.01); B22F 3/24 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/52 (2006.01); C22C 38/10 (2006.01); H01F 1/147 (2006.01); H01F 1/28 (2006.01)
CPC H01F 1/24 (2013.01) [B22F 1/068 (2022.01); B22F 1/08 (2022.01); B22F 1/102 (2022.01); B22F 1/16 (2022.01); H01F 1/14741 (2013.01); B22F 3/02 (2013.01); B22F 3/24 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0247 (2013.01); C21D 9/52 (2013.01); C22C 38/10 (2013.01); H01F 1/28 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rotating electric machine, comprising:
a magnetic composite material comprising: (i) a plurality of flaky magnetic metal particles; and (ii) an intercalated phase; and
a plate-shaped reinforcing material,
wherein the magnetic composite material has a longitudinal direction along a longest dimension, a first plane parallel to the longitudinal direction, and the first plane is in contact with the plate-shaped reinforcing material,
wherein each of the flaky magnetic metal particles includes a flat surface and a magnetic metal phase containing at least one first element selected from the group consisting of iron (Fe), cobalt (Co), and nickel (Ni),
wherein the flaky magnetic metal particles have an average thickness in a range of from 10 nm to 100 μm,
wherein an average value of a ratio of an average length in the flat surface to a thickness in the flaky magnetic metal particles is in a range of from 5 to 10,000,
wherein the flat surfaces are oriented and are approximately perpendicular to the plate-shaped reinforcing material,
wherein the intercalated phase exists between the flaky magnetic metal particles and contains at least one second element selected from the group consisting of oxygen (O), carbon (C), nitrogen (N), and fluorine (F),
wherein the flat surfaces are disposed to be approximately perpendicular to a gap surface between a stator and a rotor of the rotating electric machine, and
wherein a plurality of the flat surfaces of the flaky magnetic metal particles are in a range of 40° or less.