US 12,442,664 B2
Rotation detector and rotation detection method
Masaki Tanaka, Nara (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 18/561,315
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Apr. 19, 2022, PCT No. PCT/JP2022/018112
§ 371(c)(1), (2) Date Nov. 16, 2023,
PCT Pub. No. WO2022/249795, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2021-088894 (JP), filed on May 27, 2021.
Prior Publication US 2024/0344852 A1, Oct. 17, 2024
Int. Cl. G01D 5/14 (2006.01)
CPC G01D 5/145 (2013.01) [G01D 2205/24 (2021.05)] 11 Claims
OG exemplary drawing
 
1. A rotation detector comprising:
a magnet that rotates together with a rotary shaft;
a plurality of power generation elements that generate power according to a change in a magnetic field due to rotation of the magnet together with the rotary shaft;
a plurality of magnetic sensors each provided to a corresponding one of the plurality of power generation elements;
an information processor that determines a rotational position of the rotary shaft by using the plurality of magnetic sensors; and a generated power supply unit that supplies power generated by each of the plurality of power generation elements only to the corresponding one of the plurality of magnetic sensors.