US 12,451,788 B2
Magnetic geared rotating machine and power generation system
Takeshi Ikemi, Tokyo (JP); Takatoshi Matsushita, Tokyo (JP); Mikito Sasaki, Tokyo (JP); and Ryoji Okabe, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 18/279,518
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
PCT Filed Feb. 22, 2022, PCT No. PCT/JP2022/007120
§ 371(c)(1), (2) Date Aug. 30, 2023,
PCT Pub. No. WO2022/202050, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 2021-047372 (JP), filed on Mar. 22, 2021.
Prior Publication US 2024/0154510 A1, May 9, 2024
Int. Cl. H02K 49/10 (2006.01)
CPC H02K 49/102 (2013.01) 7 Claims
OG exemplary drawing
 
1. A magnetic geared rotating machine, comprising:
a stator which includes a plurality of stator magnets arranged so as to be aligned in a circumferential direction;
a rotor which includes a plurality of rotor magnets arranged so as to be aligned in the circumferential direction, and in which a number of magnetic poles of the plurality of rotor magnets is less than the number of magnetic poles of the plurality of stator magnets; and
a magnetic pole piece rotor which includes a plurality of magnetic pole pieces arranged so as to be aligned in the circumferential direction, wherein
each of the magnetic pole pieces has:
a first face opposed to the rotor in a radial direction; and
a second face opposed to the stator in the radial direction and having a circumferential length longer than a circumferential length of the first face,
the magnetic pole piece rotor includes a plurality of non-magnetic holders arranged in the circumferential direction alternately with the plurality of magnetic pole pieces,
each of the non-magnetic holders includes a holder surface extending in a direction approaching a circumferential midpoint of the non-magnetic holder as the holder surface goes inward in the radial direction,
each of the magnetic pole pieces has:
a third face opposed to and in contact with the holder surface; and
a fourth face located opposite to the third face in the circumferential direction,
a length in the circumferential direction from the third face to the fourth face is longer than the circumferential length of the second face,
θA≤0.67θB, where
θA is an angle defined as a value obtained by dividing an area of a region surrounded by an outer contour of the magnetic pole pieces in a radial cross section of the magnetic pole pieces by a length of the magnetic pole pieces in the radial direction and a length from a rotation center to a midpoint of the magnetic pole pieces in the radial direction, and
θB is an angle defined, in regard to each of the two magnetic pole pieces adjacent in the circumferential direction, as a positive difference value of an angular position of each of the two magnetic pole pieces with respect to the rotation center.