ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,423, issued on Jan. 27, was assigned to HITACHI ASTEMO LTD. (Hitachinaka, Japan).
"Calibration method for rotation angle sensor" was invented by Huajun Liu (Hitachinaka, Japan) and Masaki Kashima (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A motor shaft is rotated to a predetermined rotation stop position by excitation of two-phase coils out of three-phase coils of a stator coil, and a detection value of a rotation angle sensor at the rotation stop position is acquired. Further, a sensor-error correction parameter for correcting a detection value of the rotation angle sensor in drive control of an electric motor is generated f...